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1. Longitudinal cerebral perfusion in presymptomatic genetic frontotemporal dementia:GENFI results

Author: Pasternak, Maurice, Mirza, Saira S., Luciw, Nicholas, Mutsaerts, Henri J.M.M., Petr, Jan, Thomas, David L., Cash, David, Bocchetta, Martina, Tartaglia, Maria Carmela, Mitchell, Sara B., Black, Sandra E., Freedman, Morris, Tang-Wai, David, Rogaeva, Ekaterina, Russell, Lucy L., Bouzigues, Arabella, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Laforce, Robert, Tiraboschi, Pietro, Borroni, Barbara, Galimberti, Daniela, Rowe, James B., Graff, Caroline, Finger, Elizabeth, Sorbi, Sandro, de Mendonça, Alexandre, Butler, Chris, Gerhard, Alex, Sanchez-Valle, Raquel, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Levin, Johannes, Otto, Markus, Santana, Isabel, Strafella, Antonio P., MacIntosh, Bradley J., Rohrer, Jonathan D., Masellis, Mario, Pasternak, Maurice, Mirza, Saira S., Luciw, Nicholas, Mutsaerts, Henri J.M.M., Petr, Jan, Thomas, David L., Cash, David, Bocchetta, Martina, Tartaglia, Maria Carmela, Mitchell, Sara B., Black, Sandra E., Freedman, Morris, Tang-Wai, David, Rogaeva, Ekaterina, Russell, Lucy L., Bouzigues, Arabella, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Laforce, Robert, Tiraboschi, Pietro, Borroni, Barbara, Galimberti, Daniela, Rowe, James B., Graff, Caroline, Finger, Elizabeth, Sorbi, Sandro, de Mendonça, Alexandre, Butler, Chris, Gerhard, Alex, Sanchez-Valle, Raquel, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Levin, Johannes, Otto, Markus, Santana, Isabel, Strafella, Antonio P., MacIntosh, Bradley J., Rohrer, Jonathan D., and Masellis, Mario
Abstract: INTRODUCTION: Effective longitudinal biomarkers that track disease progression are needed to characterize the presymptomatic phase of genetic frontotemporal dementia (FTD). We investigate the utility of cerebral perfusion as one such biomarker in presymptomatic FTD mutation carriers. METHODS: We investigated longitudinal profiles of cerebral perfusion using arterial spin labeling magnetic resonance imaging in 42 C9orf72, 70 GRN, and 31 MAPT presymptomatic carriers and 158 non-carrier controls. Linear mixed effects models assessed perfusion up to 5 years after baseline assessment. RESULTS: Perfusion decline was evident in all three presymptomatic groups in global gray matter. Each group also featured its own regional pattern of hypoperfusion over time, with the left thalamus common to all groups. Frontal lobe regions featured lower perfusion in those who symptomatically converted versus asymptomatic carriers past their expected age of disease onset. DISCUSSION: Cerebral perfusion is a potential biomarker for assessing genetic FTD and its genetic subgroups prior to symptom onset. Highlights: Gray matter perfusion declines in at-risk genetic frontotemporal dementia (FTD). Regional perfusion decline differs between at-risk genetic FTD subgroups. Hypoperfusion in the left thalamus is common across all presymptomatic groups. Converters exhibit greater right frontal hypoperfusion than non-converters past their expected conversion date. Cerebral hypoperfusion is a potential early biomarker of genetic FTD.
Published: 2024

2. Genome-wide analyses reveal a potential role for the MAPT, MOBP, and APOE loci in sporadic frontotemporal dementia

Author: Manzoni, Claudia, Kia, Demis A., Ferrari, Raffaele, Leonenko, Ganna, Costa, Beatrice, Saba, Valentina, Jabbari, Edwin, Tan, Manuela MX, Albani, Diego, Alvarez, Victoria, Alvarez, Ignacio, Andreassen, Ole A., Angiolillo, Antonella, Arighi, Andrea, Baker, Matt, Benussi, Luisa, Bessi, Valentina, Binetti, Giuliano, Blackburn, Daniel J., Boada, Merce, Boeve, Bradley F., Borrego-Ecija, Sergi, Borroni, Barbara, Bråthen, Geir, Brooks, William S., Bruni, Amalia C., Caroppo, Paola, Bandres-Ciga, Sara, Clarimon, Jordi, Colao, Rosanna, Cruchaga, Carlos, Danek, Adrian, de Boer, Sterre CM, de Rojas, Itziar, di Costanzo, Alfonso, Dickson, Dennis W., Diehl-Schmid, Janine, Dobson-Stone, Carol, Dols-Icardo, Oriol, Donizetti, Aldo, Dopper, Elise, Durante, Elisabetta, Ferrari, Camilla, Forloni, Gianluigi, Frangipane, Francesca, Fratiglioni, Laura, Kramberger, Milica G., Galimberti, Daniela, Gallucci, Maurizio, García-González, Pablo, Ghidoni, Roberta, Giaccone, Giorgio, Graff, Caroline, Graff-Radford, Neill R., Grafman, Jordan, Halliday, Glenda M., Hernandez, Dena G., Hjermind, Lena E., Hodges, John R., Holloway, Guy, Huey, Edward D., Illán-Gala, Ignacio, Josephs, Keith A., Knopman, David S., Kristiansen, Mark, Kwok, John B., Leber, Isabelle, Leonard, Hampton L., Libri, Ilenia, Lleo, Alberto, Mackenzie, Ian R., Madhan, Gaganjit K., Maletta, Raffaele, Marquié, Marta, Maver, Ales, Menendez-Gonzalez, Manuel, Milan, Graziella, Miller, Bruce L., Morris, Christopher M., Morris, Huw R., Nacmias, Benedetta, Newton, Judith, Nielsen, Jørgen E., Nilsson, Christer, Novelli, Valeria, Padovani, Alessandro, Pal, Suvankar, Pasquier, Florence, Pastor, Pau, Perneczky, Robert, Peterlin, Borut, Petersen, Ronald C., Piguet, Olivier, Pijnenburg, Yolande AL, Puca, Annibale A., Rademakers, Rosa, Rainero, Innocenzo, Reus, Lianne M., Richardson, Anna MT, Riemenschneider, Matthias, Rogaeva, Ekaterina, Rogelj, Boris, Rollinson, Sara, Rosen, Howard, Rossi, Giacomina, Rowe, James B., Rubino, Elisa, Ruiz, Agustin, Salvi, Erika, Sanchez-Valle, Raquel, Sando, Sigrid Botne, Santillo, Alexander F., Saxon, Jennifer A., Schlachetzki, Johannes CM, Scholz, Sonja W., Seelaar, Harro, Seeley, William W., Serpente, Maria, Sorbi, Sandro, Sordon, Sabrina, St George-Hyslop, Peter, Thompson, Jennifer C., Van Broeckhoven, Christine, Van Deerlin, Vivianna M., Van der Lee, Sven J., Van Swieten, John, Tagliavini, Fabrizio, van der Zee, Julie, Veronesi, Arianna, Vitale, Emilia, Waldo, Maria Landqvist, Yokoyama, Jennifer S., Nalls, Mike A., Momeni, Parastoo, Singleton, Andrew B., Hardy, John, Escott-Price, Valentina, Manzoni, Claudia, Kia, Demis A., Ferrari, Raffaele, Leonenko, Ganna, Costa, Beatrice, Saba, Valentina, Jabbari, Edwin, Tan, Manuela MX, Albani, Diego, Alvarez, Victoria, Alvarez, Ignacio, Andreassen, Ole A., Angiolillo, Antonella, Arighi, Andrea, Baker, Matt, Benussi, Luisa, Bessi, Valentina, Binetti, Giuliano, Blackburn, Daniel J., Boada, Merce, Boeve, Bradley F., Borrego-Ecija, Sergi, Borroni, Barbara, Bråthen, Geir, Brooks, William S., Bruni, Amalia C., Caroppo, Paola, Bandres-Ciga, Sara, Clarimon, Jordi, Colao, Rosanna, Cruchaga, Carlos, Danek, Adrian, de Boer, Sterre CM, de Rojas, Itziar, di Costanzo, Alfonso, Dickson, Dennis W., Diehl-Schmid, Janine, Dobson-Stone, Carol, Dols-Icardo, Oriol, Donizetti, Aldo, Dopper, Elise, Durante, Elisabetta, Ferrari, Camilla, Forloni, Gianluigi, Frangipane, Francesca, Fratiglioni, Laura, Kramberger, Milica G., Galimberti, Daniela, Gallucci, Maurizio, García-González, Pablo, Ghidoni, Roberta, Giaccone, Giorgio, Graff, Caroline, Graff-Radford, Neill R., Grafman, Jordan, Halliday, Glenda M., Hernandez, Dena G., Hjermind, Lena E., Hodges, John R., Holloway, Guy, Huey, Edward D., Illán-Gala, Ignacio, Josephs, Keith A., Knopman, David S., Kristiansen, Mark, Kwok, John B., Leber, Isabelle, Leonard, Hampton L., Libri, Ilenia, Lleo, Alberto, Mackenzie, Ian R., Madhan, Gaganjit K., Maletta, Raffaele, Marquié, Marta, Maver, Ales, Menendez-Gonzalez, Manuel, Milan, Graziella, Miller, Bruce L., Morris, Christopher M., Morris, Huw R., Nacmias, Benedetta, Newton, Judith, Nielsen, Jørgen E., Nilsson, Christer, Novelli, Valeria, Padovani, Alessandro, Pal, Suvankar, Pasquier, Florence, Pastor, Pau, Perneczky, Robert, Peterlin, Borut, Petersen, Ronald C., Piguet, Olivier, Pijnenburg, Yolande AL, Puca, Annibale A., Rademakers, Rosa, Rainero, Innocenzo, Reus, Lianne M., Richardson, Anna MT, Riemenschneider, Matthias, Rogaeva, Ekaterina, Rogelj, Boris, Rollinson, Sara, Rosen, Howard, Rossi, Giacomina, Rowe, James B., Rubino, Elisa, Ruiz, Agustin, Salvi, Erika, Sanchez-Valle, Raquel, Sando, Sigrid Botne, Santillo, Alexander F., Saxon, Jennifer A., Schlachetzki, Johannes CM, Scholz, Sonja W., Seelaar, Harro, Seeley, William W., Serpente, Maria, Sorbi, Sandro, Sordon, Sabrina, St George-Hyslop, Peter, Thompson, Jennifer C., Van Broeckhoven, Christine, Van Deerlin, Vivianna M., Van der Lee, Sven J., Van Swieten, John, Tagliavini, Fabrizio, van der Zee, Julie, Veronesi, Arianna, Vitale, Emilia, Waldo, Maria Landqvist, Yokoyama, Jennifer S., Nalls, Mike A., Momeni, Parastoo, Singleton, Andrew B., Hardy, John, and Escott-Price, Valentina
Abstract: Frontotemporal dementia (FTD) is the second most common cause of early-onset dementia after Alzheimer disease (AD). Efforts in the field mainly focus on familial forms of disease (fFTDs), while studies of the genetic etiology of sporadic FTD (sFTD) have been less common. In the current work, we analyzed 4,685 sFTD cases and 15,308 controls looking for common genetic determinants for sFTD. We found a cluster of variants at the MAPT (rs199443; p = 2.5 × 10−12, OR = 1.27) and APOE (rs6857; p = 1.31 × 10−12, OR = 1.27) loci and a candidate locus on chromosome 3 (rs1009966; p = 2.41 × 10−8, OR = 1.16) in the intergenic region between RPSA and MOBP, contributing to increased risk for sFTD through effects on expression and/or splicing in brain cortex of functionally relevant in-cis genes at the MAPT and RPSA-MOBP loci. The association with the MAPT (H1c clade) and RPSA-MOBP loci may suggest common genetic pleiotropy across FTD and progressive supranuclear palsy (PSP) (MAPT and RPSA-MOBP loci) and across FTD, AD, Parkinson disease (PD), and cortico-basal degeneration (CBD) (MAPT locus). Our data also suggest population specificity of the risk signals, with MAPT and APOE loci associations mainly driven by Central/Nordic and Mediterranean Europeans, respectively. This study lays the foundations for future work aimed at further characterizing population-specific features of potential FTD-discriminant APOE haplotype(s) and the functional involvement and contribution of the MAPT H1c haplotype and RPSA-MOBP loci to pathogenesis of sporadic forms of FTD in brain cortex.
Published: 2024

3. Diagnostic accuracy of research criteria for prodromal frontotemporal dementia

Author: Benussi, Alberto, Premi, Enrico, Grassi, Mario, Alberici, Antonella, Cantoni, Valentina, Gazzina, Stefano, Archetti, Silvana, Gasparotti, Roberto, Fumagalli, Giorgio G., Bouzigues, Arabella, Russell, Lucy L., Samra, Kiran, Cash, David M., Bocchetta, Martina, Todd, Emily G., Convery, Rhian S., Swift, Imogen, Sogorb-Esteve, Aitana, Heller, Carolin, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert Jr, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, Mendonça, Alexandre, Tiraboschi, Pietro, Butler, Chris R., Santana, Isabel, Gerhard, Alexander, Le Ber, Isabelle, Pasquier, Florence, Ducharme, Simon, Levin, Johannes, Sorbi, Sandro, Otto, Markus, Padovani, Alessandro, Rohrer, Jonathan D., Borroni, Barbara, Benussi, Alberto, Premi, Enrico, Grassi, Mario, Alberici, Antonella, Cantoni, Valentina, Gazzina, Stefano, Archetti, Silvana, Gasparotti, Roberto, Fumagalli, Giorgio G., Bouzigues, Arabella, Russell, Lucy L., Samra, Kiran, Cash, David M., Bocchetta, Martina, Todd, Emily G., Convery, Rhian S., Swift, Imogen, Sogorb-Esteve, Aitana, Heller, Carolin, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert Jr, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, Mendonça, Alexandre, Tiraboschi, Pietro, Butler, Chris R., Santana, Isabel, Gerhard, Alexander, Le Ber, Isabelle, Pasquier, Florence, Ducharme, Simon, Levin, Johannes, Sorbi, Sandro, Otto, Markus, Padovani, Alessandro, Rohrer, Jonathan D., and Borroni, Barbara
Abstract: Background: The Genetic Frontotemporal Initiative Staging Group has proposed clinical criteria for the diagnosis of prodromal frontotemporal dementia (FTD), termed mild cognitive and/or behavioral and/or motor impairment (MCBMI). The objective of the study was to validate the proposed research criteria for MCBMI-FTD in a cohort of genetically confirmed FTD cases against healthy controls. Methods: A total of 398 participants were enrolled, 117 of whom were carriers of an FTD pathogenic variant with mild clinical symptoms, while 281 were non-carrier family members (healthy controls (HC)). A subgroup of patients underwent blood neurofilament light (NfL) levels and anterior cingulate atrophy assessment. Results: The core clinical criteria correctly classified MCBMI vs HC with an AUC of 0.79 (p < 0.001), while the addition of either blood NfL or anterior cingulate atrophy significantly increased the AUC to 0.84 and 0.82, respectively (p < 0.001). The addition of both markers further increased the AUC to 0.90 (p < 0.001). Conclusions: The proposed MCBMI criteria showed very good classification accuracy for identifying the prodromal stage of FTD.
Published: 2024

4. Extending the phenotypic spectrum assessed by the CDR plus NACC FTLD in genetic frontotemporal dementia

Author: Samra, Kiran, Peakman, Georgia, MacDougall, Amy M., Bouzigues, Arabella, Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Ber, Isabelle Le, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Bocchetta, Martina, Cash, David, Thomas, David L., Cope, Thomas, Rittman, Timothy, Benussi, Alberto, Premi, Enrico, Gasparotti, Roberto, Archetti, Silvana, Gazzina, Stefano, Cantoni, Valentina, Arighi, Andrea, Fenoglio, Chiara, Scarpini, Elio, Fumagalli, Giorgio, Borracci, Vittoria, Rossi, Giacomina, Giaccone, Giorgio, Fede, Giuseppe Di, Caroppo, Paola, Prioni, Sara, Redaelli, Veronica, Tang-Wai, David, Rogaeva, Ekaterina, Castelo-Branco, Miguel, Freedman, Morris, Keren, Ron, Black, Sandra, Mitchell, Sara, Shoesmith, Christen, Bartha, Robart, Rademakers, Rosa, Poos, Jackie, Papma, Janne M., Giannini, Lucia, van Minkelen, Rick, Pijnenburg, Yolande, Nacmias, Benedetta, Ferrari, Camilla, Polito, Cristina, Lombardi, Gemma, Bessi, Valentina, Veldsman, Michele, Andersson, Christin, Thonberg, Hakan, Öijerstedt, Linn, Jelic, Vesna, Thompson, Paul, Langheinrich, Tobias, Lladó, Albert, Antonell, Anna, Olives, Jaume, Balasa, Mircea, Bargalló, Nuria, Borrego-Ecija, Sergi, Verdelho, Ana, Maruta, Carolina, Ferreira, Catarina B., Miltenberger, Gabriel, do Couto, Frederico Simões, Gabilondo, Alazne, Gorostidi, Ana, Villanua, Jorge, Cañada, Marta, Tainta, Mikel, Zulaica, Miren, Barandiaran, Myriam, Alves, Patricia, Bender, Benjamin, Wilke, Carlo, Graf, Lisa, Vogels, Annick, Vandenbulcke, Mathieu, Van Damme, Philip, Bruffaerts, Rose, Poesen, Koen, Rosa-Neto, Pedro, Gauthier, Serge, Camuzat, Agnès, Brice, Alexis, Bertrand, Anne, Funkiewiez, Aurélie, Rinaldi, Daisy, Saracino, Dario, Colliot, Olivier, Sayah, Sabrina, Prix, Catharina, Wlasich, Elisabeth, Wagemann, Olivia, Loosli, Sandra, Schönecker, Sonja, Hoegen, Tobias, Lombardi, Jolina, Anderl-Straub, Sarah, Rollin, Adeline, Kuchcinski, Gregory, Bertoux, Maxime, Lebouvier, Thibaud, Deramecourt, Vincent, Santiago, Beatriz, Duro, Diana, Leitão, Maria João, Almeida, Maria Rosario, Tábuas-Pereira, Miguel, Afonso, Sónia, Samra, Kiran, Peakman, Georgia, MacDougall, Amy M., Bouzigues, Arabella, Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Ber, Isabelle Le, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Bocchetta, Martina, Cash, David, Thomas, David L., Cope, Thomas, Rittman, Timothy, Benussi, Alberto, Premi, Enrico, Gasparotti, Roberto, Archetti, Silvana, Gazzina, Stefano, Cantoni, Valentina, Arighi, Andrea, Fenoglio, Chiara, Scarpini, Elio, Fumagalli, Giorgio, Borracci, Vittoria, Rossi, Giacomina, Giaccone, Giorgio, Fede, Giuseppe Di, Caroppo, Paola, Prioni, Sara, Redaelli, Veronica, Tang-Wai, David, Rogaeva, Ekaterina, Castelo-Branco, Miguel, Freedman, Morris, Keren, Ron, Black, Sandra, Mitchell, Sara, Shoesmith, Christen, Bartha, Robart, Rademakers, Rosa, Poos, Jackie, Papma, Janne M., Giannini, Lucia, van Minkelen, Rick, Pijnenburg, Yolande, Nacmias, Benedetta, Ferrari, Camilla, Polito, Cristina, Lombardi, Gemma, Bessi, Valentina, Veldsman, Michele, Andersson, Christin, Thonberg, Hakan, Öijerstedt, Linn, Jelic, Vesna, Thompson, Paul, Langheinrich, Tobias, Lladó, Albert, Antonell, Anna, Olives, Jaume, Balasa, Mircea, Bargalló, Nuria, Borrego-Ecija, Sergi, Verdelho, Ana, Maruta, Carolina, Ferreira, Catarina B., Miltenberger, Gabriel, do Couto, Frederico Simões, Gabilondo, Alazne, Gorostidi, Ana, Villanua, Jorge, Cañada, Marta, Tainta, Mikel, Zulaica, Miren, Barandiaran, Myriam, Alves, Patricia, Bender, Benjamin, Wilke, Carlo, Graf, Lisa, Vogels, Annick, Vandenbulcke, Mathieu, Van Damme, Philip, Bruffaerts, Rose, Poesen, Koen, Rosa-Neto, Pedro, Gauthier, Serge, Camuzat, Agnès, Brice, Alexis, Bertrand, Anne, Funkiewiez, Aurélie, Rinaldi, Daisy, Saracino, Dario, Colliot, Olivier, Sayah, Sabrina, Prix, Catharina, Wlasich, Elisabeth, Wagemann, Olivia, Loosli, Sandra, Schönecker, Sonja, Hoegen, Tobias, Lombardi, Jolina, Anderl-Straub, Sarah, Rollin, Adeline, Kuchcinski, Gregory, Bertoux, Maxime, Lebouvier, Thibaud, Deramecourt, Vincent, Santiago, Beatriz, Duro, Diana, Leitão, Maria João, Almeida, Maria Rosario, Tábuas-Pereira, Miguel, and Afonso, Sónia
Abstract: INTRODUCTION: We aimed to expand the range of the frontotemporal dementia (FTD) phenotypes assessed by the Clinical Dementia Rating Dementia Staging Instrument plus National Alzheimer's Coordinating Center Behavior and Language Domains (CDR plus NACC FTLD). METHODS: Neuropsychiatric and motor domains were added to the standard CDR plus NACC FTLD generating a new CDR plus NACC FTLD-NM scale. This was assessed in 522 mutation carriers and 310 mutation-negative controls from the Genetic Frontotemporal dementia Initiative (GENFI). RESULTS: The new scale led to higher global severity scores than the CDR plus NACC FTLD: 1.4% of participants were now considered prodromal rather than asymptomatic, while 1.3% were now considered symptomatic rather than asymptomatic or prodromal. No participants with a clinical diagnosis of an FTD spectrum disorder were classified as asymptomatic using the new scales. DISCUSSION: Adding new domains to the CDR plus NACC FTLD leads to a scale that encompasses the wider phenotypic spectrum of FTD with further work needed to validate its use more widely. Highlights: The new Clinical Dementia Rating Dementia Staging Instrument plus National Alzheimer's Coordinating Center Behavior and Language Domains neuropsychiatric and motor (CDR plus NACC FTLD-NM) rating scale was significantly positively correlated with the original CDR plus NACC FTLD and negatively correlated with the FTD Rating Scale (FRS). No participants with a clinical diagnosis in the frontotemporal dementia spectrum were classified as asymptomatic with the new CDR plus NACC FTLD-NM rating scale. Individuals had higher global severity scores with the addition of the neuropsychiatric and motor domains. A receiver operating characteristic analysis of symptomatic diagnosis showed nominally higher areas under the curve for the new scales.
Published: 2024

5. Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Author: Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., Mignot, Emmanuel, Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., and Mignot, Emmanuel
Abstract: Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1* 04:07, and intermediary with HLA-DRB1* 04:01 and HLA- DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased A beta 42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.
Published: 2023
Full Text: View/download PDF

6. Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Author: Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., Mignot, Emmanuel, Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., and Mignot, Emmanuel
Abstract: Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1* 04:07, and intermediary with HLA-DRB1* 04:01 and HLA- DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased A beta 42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.
Published: 2023
Full Text: View/download PDF

7. Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Author: Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., Mignot, Emmanuel, Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., and Mignot, Emmanuel
Abstract: Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1* 04:07, and intermediary with HLA-DRB1* 04:01 and HLA- DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased A beta 42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.
Published: 2023
Full Text: View/download PDF

8. Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Author: Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., Mignot, Emmanuel, Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., and Mignot, Emmanuel
Abstract: Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1* 04:07, and intermediary with HLA-DRB1* 04:01 and HLA- DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased A beta 42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.
Published: 2023
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9. Neurodevelopmental effects of genetic frontotemporal dementia in young adult mutation carriers

Author: Finger, Elizabeth, Malik, Rubina, Bocchetta, Martina, Coleman, Kristy, Graff, Caroline, Borroni, Barbara, Masellis, Mario, Laforce, Robert, Greaves, Caroline V., Russell, Lucy L., Convery, Rhian S., Bouzigues, Arabella, Cash, David M., Otto, Markus, Synofzik, Matthis, Rowe, James B., Galimberti, Daniela, Tiraboschi, Pietro, Bartha, Robert, Shoesmith, Christen, Tartaglia, Maria Carmela, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize C., Sorbi, Sandro, Butler, Chris R., Gerhard, Alexander, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Vandenberghe, Rik, Le Ber, Isabelle, Levin, Johannes, Pasquier, Florence, Santana, Isabel, Rohrer, Jonathan D., Ducharme, Simon, Finger, Elizabeth, Malik, Rubina, Bocchetta, Martina, Coleman, Kristy, Graff, Caroline, Borroni, Barbara, Masellis, Mario, Laforce, Robert, Greaves, Caroline V., Russell, Lucy L., Convery, Rhian S., Bouzigues, Arabella, Cash, David M., Otto, Markus, Synofzik, Matthis, Rowe, James B., Galimberti, Daniela, Tiraboschi, Pietro, Bartha, Robert, Shoesmith, Christen, Tartaglia, Maria Carmela, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize C., Sorbi, Sandro, Butler, Chris R., Gerhard, Alexander, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Vandenberghe, Rik, Le Ber, Isabelle, Levin, Johannes, Pasquier, Florence, Santana, Isabel, Rohrer, Jonathan D., and Ducharme, Simon
Abstract: While frontotemporal dementia has been considered a neurodegenerative disease that starts in mid-life or later, it is now clearly established that cortical and subcortical volume loss is observed more than a decade prior to symptom onset and progresses with ageing. To test the hypothesis that genetic mutations causing frontotemporal dementia have neurodevelopmental consequences, we examined the youngest adults in the GENFI cohort of pre-symptomatic frontotemporal dementia mutation carriers who are between 19 and 30 years of age. Structural brain differences and improved performance on some cognitive tests were found for MAPT and GRN mutation carriers relative to familial non-carriers, while smaller volumes were observed in C9orf72 repeat expansion carriers at a mean age of 26 years. The detection of such early differences supports potential advantageous neurodevelopmental consequences of some frontotemporal dementia-causing genetic mutations. These results have implications for the design of therapeutic interventions for frontotemporal dementia. Future studies at younger ages are needed to identify specific early pathophysiologic or compensatory processes that occur during the neurodevelopmental period.
Published: 2023

10. Genetic Associations Between Modifiable Risk Factors and Alzheimer Disease

Author: Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Frikke-Schmidt, Ruth, Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, and Frikke-Schmidt, Ruth
Abstract: IMPORTANCE An estimated 40% of dementia is potentially preventable by modifying 12 risk factors throughout the life course. However, robust evidence for most of these risk factors is lacking. Effective interventions should target risk factors in the causal pathway to dementia. OBJECTIVE To comprehensively disentangle potentially causal aspects of modifiable risk factors for Alzheimer disease (AD) to inspire new drug targeting and improved prevention. DESIGN, SETTING, AND PARTICIPANTS This genetic association study was conducted using 2-sample univariable and multivariable mendelian randomization. Independent genetic variants associated with modifiable risk factors were selected as instrumental variables from genomic consortia. Outcome data for AD were obtained from the European Alzheimer & Dementia Biobank (EADB), generated on August 31, 2021. Main analyses were conducted using the EADB clinically diagnosed end point data. All analyses were performed between April 12 and October 27, 2022. EXPOSURES Genetically determined modifiable risk factors. MAIN OUTCOMES AND MEASURES Odds ratios (ORs) and 95% CIs for AD were calculated per 1-unit change of genetically determined risk factors. RESULTS The EADB-diagnosed cohort included 39106 participants with clinically diagnosed AD and 401577 control participants without AD. The mean age ranged from 72 to 83 years for participants with AD and 51 to 80 years for control participants. Among participants with AD, 54% to 75% were female, and among control participants, 48% to 60% were female. Genetically determined high-density lipoprotein (HDL) cholesterol concentrations were associated with increased odds of AD (OR per 1-SD increase, 1.10 [95% CI, 1.05-1.16]). Genetically determined high systolic blood pressure was associated with increased risk of AD after adjusting for diastolic blood pressure (OR per 10-mm Hg increase, 1.22 [95% CI, 1.02-1.46]). In a second analysis to minimize bias due to sample overlap, the entire UK Bio
Published: 2023
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11. Genetic Associations Between Modifiable Risk Factors and Alzheimer Disease

Author: Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Frikke-Schmidt, Ruth, Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, and Frikke-Schmidt, Ruth
Abstract: IMPORTANCE An estimated 40% of dementia is potentially preventable by modifying 12 risk factors throughout the life course. However, robust evidence for most of these risk factors is lacking. Effective interventions should target risk factors in the causal pathway to dementia. OBJECTIVE To comprehensively disentangle potentially causal aspects of modifiable risk factors for Alzheimer disease (AD) to inspire new drug targeting and improved prevention. DESIGN, SETTING, AND PARTICIPANTS This genetic association study was conducted using 2-sample univariable and multivariable mendelian randomization. Independent genetic variants associated with modifiable risk factors were selected as instrumental variables from genomic consortia. Outcome data for AD were obtained from the European Alzheimer & Dementia Biobank (EADB), generated on August 31, 2021. Main analyses were conducted using the EADB clinically diagnosed end point data. All analyses were performed between April 12 and October 27, 2022. EXPOSURES Genetically determined modifiable risk factors. MAIN OUTCOMES AND MEASURES Odds ratios (ORs) and 95% CIs for AD were calculated per 1-unit change of genetically determined risk factors. RESULTS The EADB-diagnosed cohort included 39106 participants with clinically diagnosed AD and 401577 control participants without AD. The mean age ranged from 72 to 83 years for participants with AD and 51 to 80 years for control participants. Among participants with AD, 54% to 75% were female, and among control participants, 48% to 60% were female. Genetically determined high-density lipoprotein (HDL) cholesterol concentrations were associated with increased odds of AD (OR per 1-SD increase, 1.10 [95% CI, 1.05-1.16]). Genetically determined high systolic blood pressure was associated with increased risk of AD after adjusting for diastolic blood pressure (OR per 10-mm Hg increase, 1.22 [95% CI, 1.02-1.46]). In a second analysis to minimize bias due to sample overlap, the entire UK Bio
Published: 2023
Full Text: View/download PDF

12. Genetic Associations Between Modifiable Risk Factors and Alzheimer Disease

Author: Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Frikke-Schmidt, Ruth, Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, and Frikke-Schmidt, Ruth
Abstract: IMPORTANCE An estimated 40% of dementia is potentially preventable by modifying 12 risk factors throughout the life course. However, robust evidence for most of these risk factors is lacking. Effective interventions should target risk factors in the causal pathway to dementia. OBJECTIVE To comprehensively disentangle potentially causal aspects of modifiable risk factors for Alzheimer disease (AD) to inspire new drug targeting and improved prevention. DESIGN, SETTING, AND PARTICIPANTS This genetic association study was conducted using 2-sample univariable and multivariable mendelian randomization. Independent genetic variants associated with modifiable risk factors were selected as instrumental variables from genomic consortia. Outcome data for AD were obtained from the European Alzheimer & Dementia Biobank (EADB), generated on August 31, 2021. Main analyses were conducted using the EADB clinically diagnosed end point data. All analyses were performed between April 12 and October 27, 2022. EXPOSURES Genetically determined modifiable risk factors. MAIN OUTCOMES AND MEASURES Odds ratios (ORs) and 95% CIs for AD were calculated per 1-unit change of genetically determined risk factors. RESULTS The EADB-diagnosed cohort included 39106 participants with clinically diagnosed AD and 401577 control participants without AD. The mean age ranged from 72 to 83 years for participants with AD and 51 to 80 years for control participants. Among participants with AD, 54% to 75% were female, and among control participants, 48% to 60% were female. Genetically determined high-density lipoprotein (HDL) cholesterol concentrations were associated with increased odds of AD (OR per 1-SD increase, 1.10 [95% CI, 1.05-1.16]). Genetically determined high systolic blood pressure was associated with increased risk of AD after adjusting for diastolic blood pressure (OR per 10-mm Hg increase, 1.22 [95% CI, 1.02-1.46]). In a second analysis to minimize bias due to sample overlap, the entire UK Bio
Published: 2023
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13. Network structure and transcriptomic vulnerability shape atrophy in frontotemporal dementia.

Author: Shafiei, Golia, Shafiei, Golia, Bazinet, Vincent, Dadar, Mahsa, Manera, Ana L, Collins, D Louis, Dagher, Alain, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris, Gerhard, Alex, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Jiskoot, Lize C, Seelaar, Harro, van Swieten, John C, Rohrer, Jonathan D, Misic, Bratislav, Ducharme, Simon, Frontotemporal Lobar Degeneration Neuroimaging Initiative (FTLDNI), GENetic Frontotemporal dementia Initiative (GENFI), Shafiei, Golia, Shafiei, Golia, Bazinet, Vincent, Dadar, Mahsa, Manera, Ana L, Collins, D Louis, Dagher, Alain, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris, Gerhard, Alex, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Jiskoot, Lize C, Seelaar, Harro, van Swieten, John C, Rohrer, Jonathan D, Misic, Bratislav, Ducharme, Simon, Frontotemporal Lobar Degeneration Neuroimaging Initiative (FTLDNI), and GENetic Frontotemporal dementia Initiative (GENFI)
Abstract: Connections among brain regions allow pathological perturbations to spread from a single source region to multiple regions. Patterns of neurodegeneration in multiple diseases, including behavioural variant of frontotemporal dementia (bvFTD), resemble the large-scale functional systems, but how bvFTD-related atrophy patterns relate to structural network organization remains unknown. Here we investigate whether neurodegeneration patterns in sporadic and genetic bvFTD are conditioned by connectome architecture. Regional atrophy patterns were estimated in both genetic bvFTD (75 patients, 247 controls) and sporadic bvFTD (70 patients, 123 controls). First, we identified distributed atrophy patterns in bvFTD, mainly targeting areas associated with the limbic intrinsic network and insular cytoarchitectonic class. Regional atrophy was significantly correlated with atrophy of structurally- and functionally-connected neighbours, demonstrating that network structure shapes atrophy patterns. The anterior insula was identified as the predominant group epicentre of brain atrophy using data-driven and simulation-based methods, with some secondary regions in frontal ventromedial and antero-medial temporal areas. We found that FTD-related genes, namely C9orf72 and TARDBP, confer local transcriptomic vulnerability to the disease, modulating the propagation of pathology through the connectome. Collectively, our results demonstrate that atrophy patterns in sporadic and genetic bvFTD are jointly shaped by global connectome architecture and local transcriptomic vulnerability, providing an explanation as to how heterogenous pathological entities can lead to the same clinical syndrome.
Published: 2023

14. Genetic Associations Between Modifiable Risk Factors and Alzheimer Disease

Author: Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Frikke-Schmidt, Ruth, Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, and Frikke-Schmidt, Ruth
Abstract: IMPORTANCE An estimated 40% of dementia is potentially preventable by modifying 12 risk factors throughout the life course. However, robust evidence for most of these risk factors is lacking. Effective interventions should target risk factors in the causal pathway to dementia. OBJECTIVE To comprehensively disentangle potentially causal aspects of modifiable risk factors for Alzheimer disease (AD) to inspire new drug targeting and improved prevention. DESIGN, SETTING, AND PARTICIPANTS This genetic association study was conducted using 2-sample univariable and multivariable mendelian randomization. Independent genetic variants associated with modifiable risk factors were selected as instrumental variables from genomic consortia. Outcome data for AD were obtained from the European Alzheimer & Dementia Biobank (EADB), generated on August 31, 2021. Main analyses were conducted using the EADB clinically diagnosed end point data. All analyses were performed between April 12 and October 27, 2022. EXPOSURES Genetically determined modifiable risk factors. MAIN OUTCOMES AND MEASURES Odds ratios (ORs) and 95% CIs for AD were calculated per 1-unit change of genetically determined risk factors. RESULTS The EADB-diagnosed cohort included 39106 participants with clinically diagnosed AD and 401577 control participants without AD. The mean age ranged from 72 to 83 years for participants with AD and 51 to 80 years for control participants. Among participants with AD, 54% to 75% were female, and among control participants, 48% to 60% were female. Genetically determined high-density lipoprotein (HDL) cholesterol concentrations were associated with increased odds of AD (OR per 1-SD increase, 1.10 [95% CI, 1.05-1.16]). Genetically determined high systolic blood pressure was associated with increased risk of AD after adjusting for diastolic blood pressure (OR per 10-mm Hg increase, 1.22 [95% CI, 1.02-1.46]). In a second analysis to minimize bias due to sample overlap, the entire UK Bio
Published: 2023
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15. Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes

Author: Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., Mignot, Emmanuel, Le Guen, Yann, Luo, Guo, Ambati, Aditya, Damotte, Vincent, Jansen, Iris, Yu, Eric, Nicolas, Aude, de Rojasj, Itziar, Leal, Thiago Peixoto, Miyashita, Akinori, Bellenguez, Celine, Lian, Michelle Mulan, Parveen, Kayenat, Morizono, Takashi, Park, Hyeonseul, Grenier-Boley, Benjamin, Naito, Tatsuhiko, Kucukali, Fahri, Talyansky, Seth D., Yogeshwar, Selina Maria, Sempere, Vicente, Satake, Wataru, Alvarez, Victoria, Arosio, Beatrice, Belloy, Michael E., Benussi, Luisa, Boland, Anne, Borroni, Barbara, Bullido, Maria J., Caffarra, Paolo, Clarimon, Jordi, Daniele, Antonio, Darling, Daniel, Debette, Stephanie, Deleuze, Jean-Francois, Dichgans, Martin, Dufouil, Carole, During, Emmanuel, Duzel, Emrah, Galimberti, Daniela, Garcia-Ribas, Guillermo, Maria Garcia-Alberca, Jose, Garcia-Gonzalez, Pablo, Giedraitis, Vilmantas, Goldhardt, Oliver, Graff, Caroline, Grunblatt, Edna, Hanon, Olivier, Hausner, Lucrezia, Heilmann-Heimbach, Stefanie, Holstege, Henne, Hort, Jakub, Jung, Yoo Jin, Jurgen, Deckert, Kern, Silke, Kuulasmaa, Teemu, Lee, Kun Ho, Lin, Ling, Masullo, Carlo, Mecocci, Patrizia, Mehrabian, Shima, de Mendonca, Alexandre, Boada, Merce, Mir, Pablo, Moebus, Susanne, Moreno, Fermin, Nacmias, Benedetta, Nicolas, Gael, Niida, Shumpei, Nordestgaard, Borge G., Papenberg, Goran, Papma, Janne, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peters, Oliver, Pijnenburg, Yolande A. L., Pinol-Ripoll, Gerard, Popp, Julius, Porcel, Laura Molina, Jordi Perez-Tur, Raquel Puertaj, Rainero, Innocenzo, Ramakers, Inez, Real, Luis M., Riedel-Heller, Steffi, Rodriguez-Rodriguez, Eloy, Ross, Owen A., Royo, Jose Luis, Rujescu, Dan, Scarmeas, Nikolaos, Scheltens, Philip, Scherbaum, Norbert, Schneider, Anja, Seripa, Davide, Skoog, Ingmar, Solfrizzi, Vincenzo, Spalletta, Gianfranco, Squassina, Alessio, van Swieten, John, Sanchez-Valle, Raquel, Tan, Eng-King, Tegos, Thomas, Teunissen, Charlotte, Thomassen, Jesper Qvist, Tremolizzo, Lucio, Vyhnalek, Martin, Verhey, Frans, Waern, Margda, Wiltfang, Jens, Zhangc, Jing, Zetterberg, Henrik, Blennow, Kaj, He, Zihuai, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick G., Andreassen, Ole A., Van Duin, Cornelia, Tsolaki, Magda, Sanchez-Juan, Pascual, Frikke-Schmidt, Ruth, Sleegers, Kristel, Todau, Tatsushi, Zettergren, Anna, Ingelsson, Martin, Okada, Yukinori, Rossi, Giacomina, Hiltunen, Mikko, Gim, Jungsoo, Ozaki, Kouichi, Sims, Rebecca, Foo, Jia Nee, van der Fliere, Wiesje, Ikeuchi, Takeshi, Ramirez, Alfredo, Mata, Ignacio, Ruiz, Agustin, Gan-Or, Ziv, Lambert, Jean-Charles, Greicius, Michael D., and Mignot, Emmanuel
Abstract: Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1* 04:07, and intermediary with HLA-DRB1* 04:01 and HLA- DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased A beta 42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.
Published: 2023
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16. Altered plasma protein profiles in genetic FTD – a GENFI study

Author: Ullgren, Abbe, Öijerstedt, Linn, Olofsson, Jennie, Bergström, Sofia, Remnestål, Julia, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tirabosch, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Chris R., Gerhard, Alexander, Otto, Markus, Bouzigues, Arabella, Russell, Lucy, Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Rohrer, Jonathan D., Månberg, Anna, Nilsson, Peter, Graff, Caroline, Ullgren, Abbe, Öijerstedt, Linn, Olofsson, Jennie, Bergström, Sofia, Remnestål, Julia, van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tirabosch, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Chris R., Gerhard, Alexander, Otto, Markus, Bouzigues, Arabella, Russell, Lucy, Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Rohrer, Jonathan D., Månberg, Anna, Nilsson, Peter, and Graff, Caroline
Abstract: Background: Plasma biomarkers reflecting the pathology of frontotemporal dementia would add significant value to clinical practice, to the design and implementation of treatment trials as well as our understanding of disease mechanisms. The aim of this study was to explore the levels of multiple plasma proteins in individuals from families with genetic frontotemporal dementia. Methods: Blood samples from 693 participants in the GENetic Frontotemporal Dementia Initiative study were analysed using a multiplexed antibody array targeting 158 proteins. Results: We found 13 elevated proteins in symptomatic mutation carriers, when comparing plasma levels from people diagnosed with genetic FTD to healthy non-mutation controls and 10 proteins that were elevated compared to presymptomatic mutation carriers. Conclusion: We identified plasma proteins with altered levels in symptomatic mutation carriers compared to non-carrier controls as well as to presymptomatic mutation carriers. Further investigations are needed to elucidate their potential as fluid biomarkers of the disease process.
Published: 2023

17. Motor symptoms in genetic frontotemporal dementia:developing a new module for clinical rating scales

Author: MacDougall, Amy M., Samra, Kiran, Peakman, Georgia, Bouzigues, Arabella, Bocchetta, Martina, Cash, David, Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Poos, Jackie, Papma, Janne M., Giannini, Lucia, van Minkelen, Rick, MacDougall, Amy M., Samra, Kiran, Peakman, Georgia, Bouzigues, Arabella, Bocchetta, Martina, Cash, David, Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Poos, Jackie, Papma, Janne M., Giannini, Lucia, and van Minkelen, Rick
Abstract: Objective: To investigate the optimal method of adding motor features to a clinical rating scale for frontotemporal dementia (FTD). Methods: Eight hundred and thirty-two participants from the international multicentre Genetic FTD Initiative (GENFI) study were recruited: 522 mutation carriers (with C9orf72, GRN and MAPT mutations) and 310 mutation-negative controls. A standardised clinical questionnaire was used to assess eight motor symptoms (dysarthria, dysphagia, tremor, slowness, weakness, gait disorder, falls and functional difficulties using hands). Frequency and severity of each motor symptom was assessed, and a principal component analysis (PCA) was performed to identify how the different motor symptoms loaded together. Finally, addition of a motor component to the CDR® plus NACC FTLD was investigated (CDR® plus NACC FTLD-M). Results: 24.3% of mutation carriers had motor symptoms (31.7% C9orf72, 18.8% GRN, 19.3% MAPT) compared to 6.8% of controls. Slowness and gait disorder were the commonest in all genetic groups while tremor and falls were the least frequent. Symptom severity scores were similar to equivalent physical motor examination scores. PCA revealed that all motor symptoms loaded together so a single additional motor component was added to the CDR® plus NACC FTLD to form the CDR® plus NACC FTLD-M. Individual global scores were more severe with the CDR® plus NACC FTLD-M, and no patients with a clinically diagnosed motor disorder (ALS/FTD-ALS or parkinsonism) were classified anymore as asymptomatic (unlike the CDR® plus NACC FTLD alone). Conclusions: Motor features are present in mutation carriers at all disease stages across all three genetic groups. Inclusion of motor symptoms in a rating scale that can be used in future clinical trials will not only ensure a more accurate severity measure is recorded but that a wider spectrum of FTD phenotypes can be included in the same trial.
Published: 2023

18. Prodromal language impairment in genetic frontotemporal dementia within the GENFI cohort

Author: Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alex, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Jiskoot, Lize, Seelaar, Harro, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alex, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., and Russell, Lucy L.
Abstract: Objective: To identify whether language impairment exists presymptomatically in genetic frontotemporal dementia (FTD), and if so, the key differences between the main genetic mutation groups. Methods: 682 participants from the international multicentre Genetic FTD Initiative (GENFI) study were recruited: 290 asymptomatic and 82 prodromal mutation carriers (with C9orf72, GRN, and MAPT mutations) as well as 310 mutation-negative controls. Language was assessed using items from the Progressive Aphasia Severity Scale, as well as the Boston Naming Test (BNT), modified Camel and Cactus Test (mCCT) and a category fluency task. Participants also underwent a 3 T volumetric T1-weighted MRI from which regional brain volumes within the language network were derived and compared between the groups. Results: 3% of asymptomatic (4% C9orf72, 4% GRN, 2% MAPT) and 48% of prodromal (46% C9orf72, 42% GRN, 64% MAPT) mutation carriers had impairment in at least one language symptom compared with 13% of controls. In prodromal mutation carriers significantly impaired word retrieval was seen in all three genetic groups whilst significantly impaired grammar/syntax and decreased fluency was seen only in C9orf72 and GRN mutation carriers, and impaired articulation only in the C9orf72 group. Prodromal MAPT mutation carriers had significant impairment on the category fluency task and the BNT whilst prodromal C9orf72 mutation carriers were impaired on the category fluency task only. Atrophy in the dominant perisylvian language regions differed between groups, with earlier, more widespread volume loss in C9orf72, and later focal atrophy in the temporal lobe in MAPT mutation carriers. Conclusions: Language deficits exist in the prodromal but not asymptomatic stages of genetic FTD across all three genetic groups. Improved understanding of the language phenotype prior to phenoconversion to fully symptomatic FTD will help develop outcome measures for future presymptomatic trials.
Published: 2023

19. Positron emission tomography and magnetic resonance imaging methods and datasets within the dominantly inherited Alzheimer network (DIAN)

Author: McKay, Nicole S., Gordon, Brian A., Hornbeck, Russ C., Dincer, Aylin, Flores, Shaney, Keefe, Sarah J., Joseph-Mathurin, Nelly, Jack, Clifford R., Koeppe, Robert, Millar, Peter R., Ances, Beau M., Chen, Charles D., Daniels, Alisha, Hobbs, Diana A., Jackson, Kelley, Koudelis, Deborah, Massoumzadeh, Parinaz, McCullough, Austin, Nickels, Michael L., Rahmani, Farzaneh, Swisher, Laura, Wang, Qing, Allegri, Ricardo F., Berman, Sarah B., Brickman, Adam M., Brooks, William S., Cash, David M., Chhatwal, Jasmeer P., Day, Gregory S., Farlow, Martin R., la Fougère, Christian, Fox, Nick C., Fulham, Michael, Ghetti, Bernardino, Graff-Radford, Neill, Ikeuchi, Takeshi, Klunk, William, Lee, Jae-Hong, Levin, Johannes, Martins, Ralph, Masters, Colin L., McConathy, Jonathan, Mori, Hiroshi, Noble, James M., Reischl, Gerald, Rowe, Christopher, Salloway, Stephen, Sanchez-Valle, Raquel, Schofield, Peter R., Shimada, Hiroyuki, Shoji, Mikio, Su, Yi, Suzuki, Kazushi, Vöglein, Jonathan, Yakushev, Igor, Cruchaga, Carlos, Hassenstab, Jason, Karch, Celeste, McDade, Eric, Perrin, Richard J., Xiong, Chengjie, Morris, John C., Bateman, Randall J., Benzinger, Tammie L. S., Dominantly Inherited Alzheimer Network, McKay, Nicole S., Gordon, Brian A., Hornbeck, Russ C., Dincer, Aylin, Flores, Shaney, Keefe, Sarah J., Joseph-Mathurin, Nelly, Jack, Clifford R., Koeppe, Robert, Millar, Peter R., Ances, Beau M., Chen, Charles D., Daniels, Alisha, Hobbs, Diana A., Jackson, Kelley, Koudelis, Deborah, Massoumzadeh, Parinaz, McCullough, Austin, Nickels, Michael L., Rahmani, Farzaneh, Swisher, Laura, Wang, Qing, Allegri, Ricardo F., Berman, Sarah B., Brickman, Adam M., Brooks, William S., Cash, David M., Chhatwal, Jasmeer P., Day, Gregory S., Farlow, Martin R., la Fougère, Christian, Fox, Nick C., Fulham, Michael, Ghetti, Bernardino, Graff-Radford, Neill, Ikeuchi, Takeshi, Klunk, William, Lee, Jae-Hong, Levin, Johannes, Martins, Ralph, Masters, Colin L., McConathy, Jonathan, Mori, Hiroshi, Noble, James M., Reischl, Gerald, Rowe, Christopher, Salloway, Stephen, Sanchez-Valle, Raquel, Schofield, Peter R., Shimada, Hiroyuki, Shoji, Mikio, Su, Yi, Suzuki, Kazushi, Vöglein, Jonathan, Yakushev, Igor, Cruchaga, Carlos, Hassenstab, Jason, Karch, Celeste, McDade, Eric, Perrin, Richard J., Xiong, Chengjie, Morris, John C., Bateman, Randall J., Benzinger, Tammie L. S., and Dominantly Inherited Alzheimer Network
Abstract: The Dominantly Inherited Alzheimer Network (DIAN) is an international collaboration studying autosomal dominant Alzheimer disease (ADAD). ADAD arises from mutations occurring in three genes. Offspring from ADAD families have a 50% chance of inheriting their familial mutation, so non-carrier siblings can be recruited for comparisons in case–control studies. The age of onset in ADAD is highly predictable within families, allowing researchers to estimate an individual’s point in the disease trajectory. These characteristics allow candidate AD biomarker measurements to be reliably mapped during the preclinical phase. Although ADAD represents a small proportion of AD cases, understanding neuroimaging-based changes that occur during the preclinical period may provide insight into early disease stages of ‘sporadic’ AD also. Additionally, this study provides rich data for research in healthy aging through inclusion of the non-carrier controls. Here we introduce the neuroimaging dataset collected and describe how this resource can be used by a range of researchers.
Published: 2023

20. Network structure and transcriptomic vulnerability shape atrophy in frontotemporal dementia

Author: Shafiei, Golia, Bazinet, Vincent, Dadar, Mahsa, Manera, Ana L., Collins, D. Louis, Dagher, Alain, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris, Gerhard, Alex, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Jiskoot, Lize C., Seelaar, Harro, van Swieten, John C., Rohrer, Jonathan D., Misic, Bratislav, Ducharme, Simon, Shafiei, Golia, Bazinet, Vincent, Dadar, Mahsa, Manera, Ana L., Collins, D. Louis, Dagher, Alain, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris, Gerhard, Alex, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Jiskoot, Lize C., Seelaar, Harro, van Swieten, John C., Rohrer, Jonathan D., Misic, Bratislav, and Ducharme, Simon
Abstract: Connections among brain regions allow pathological perturbations to spread from a single source region to multiple regions. Patterns of neurodegeneration in multiple diseases, including behavioural variant of frontotemporal dementia (bvFTD), resemble the large-scale functional systems, but how bvFTD-related atrophy patterns relate to structural network organization remains unknown. Here we investigate whether neurodegeneration patterns in sporadic and genetic bvFTD are conditioned by connectome architecture. Regional atrophy patterns were estimated in both genetic bvFTD (75 patients, 247 controls) and sporadic bvFTD (70 patients, 123 controls). First, we identified distributed atrophy patterns in bvFTD, mainly targeting areas associated with the limbic intrinsic network and insular cytoarchitectonic class. Regional atrophy was significantly correlated with atrophy of structurally- and functionally-connected neighbours, demonstrating that network structure shapes atrophy patterns. The anterior insula was identified as the predominant group epicentre of brain atrophy using data-driven and simulation-based methods, with some secondary regions in frontal ventromedial and antero-medial temporal areas. We found that FTD-related genes, namely C9orf72 and TARDBP, confer local transcriptomic vulnerability to the disease, modulating the propagation of pathology through the connectome. Collectively, our results demonstrate that atrophy patterns in sporadic and genetic bvFTD are jointly shaped by global connectome architecture and local transcriptomic vulnerability, providing an explanation as to how heterogenous pathological entities can lead to the same clinical syndrome.
Published: 2023

21. Genetic Associations Between Modifiable Risk Factors and Alzheimer Disease

Author: Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Frikke-Schmidt, Ruth, Luo, Jiao, Thomassen, Jesper Qvist, Bellenguez, Celine, Grenier-Boley, Benjamin, de Rojas, Itziar, Castillo, Atahualpa, Parveen, Kayenat, Kuecuekali, Fahri, Nicolas, Aude, Peters, Oliver, Schneider, Anja, Dichgans, Martin, Rujescu, Dan, Scherbaum, Norbert, Juergen, Deckert, Riedel-Heller, Steffi, Hausner, Lucrezia, Porcel, Laura Molina, Duezel, Emrah, Grimmer, Timo, Wiltfang, Jens, Heilmann-Heimbach, Stefanie, Moebus, Susanne, Tegos, Thomas, Scarmeas, Nikolaos, Clarimon, Jordi, Moreno, Fermin, Perez-Tur, Jordi, Bullido, Maria J., Pastor, Pau, Sanchez-Valle, Raquel, Alvarez, Victoria, Boada, Merce, Garcia-Gonzalez, Pablo, Puerta, Raquel, Mir, Pablo, Real, Luis M., Pinol-Ripoll, Gerard, Garcia-Alberca, Jose Maria, Royo, Jose Luis, Rodriguez-Rodriguez, Eloy, Soininen, Hilkka, Kuulasmaa, Teemu, de Mendonca, Alexandre, Mehrabian, Shima, Hort, Jakub, Vyhnalek, Martin, van der Lee, Sven, Graff, Caroline, Papenberg, Goran, Giedraitis, Vilmantas, Boland, Anne, Bacq-Daian, Delphine, Deleuze, Jean-Francois, Nicolas, Gael, Dufouil, Carole, Pasquier, Florence, Hanon, Olivier, Debette, Stephanie, Gruenblatt, Edna, Popp, Julius, Benussi, Luisa, Galimberti, Daniela, Arosio, Beatrice, Mecocci, Patrizia, Solfrizzi, Vincenzo, Parnetti, Lucilla, Squassina, Alessio, Tremolizzo, Lucio, Borroni, Barbara, Nacmias, Benedetta, Sorbi, Sandro, Caffarra, Paolo, Seripa, Davide, Rainero, Innocenzo, Daniele, Antonio, Masullo, Carlo, Spalletta, Gianfranco, Williams, Julie, Amouyel, Philippe, Jessen, Frank, Kehoe, Patrick, Magda, Tsolaki, Rossi, Giacomina, Sanchez-Juan, Pascual, Sleegers, Kristel, Ingelsson, Martin, Andreassen, Ole A., Hiltunen, Mikko, Van Duijn, Cornelia, Sims, Rebecca, van der Flier, Wiesje, Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, and Frikke-Schmidt, Ruth
Abstract: IMPORTANCE An estimated 40% of dementia is potentially preventable by modifying 12 risk factors throughout the life course. However, robust evidence for most of these risk factors is lacking. Effective interventions should target risk factors in the causal pathway to dementia. OBJECTIVE To comprehensively disentangle potentially causal aspects of modifiable risk factors for Alzheimer disease (AD) to inspire new drug targeting and improved prevention. DESIGN, SETTING, AND PARTICIPANTS This genetic association study was conducted using 2-sample univariable and multivariable mendelian randomization. Independent genetic variants associated with modifiable risk factors were selected as instrumental variables from genomic consortia. Outcome data for AD were obtained from the European Alzheimer & Dementia Biobank (EADB), generated on August 31, 2021. Main analyses were conducted using the EADB clinically diagnosed end point data. All analyses were performed between April 12 and October 27, 2022. EXPOSURES Genetically determined modifiable risk factors. MAIN OUTCOMES AND MEASURES Odds ratios (ORs) and 95% CIs for AD were calculated per 1-unit change of genetically determined risk factors. RESULTS The EADB-diagnosed cohort included 39106 participants with clinically diagnosed AD and 401577 control participants without AD. The mean age ranged from 72 to 83 years for participants with AD and 51 to 80 years for control participants. Among participants with AD, 54% to 75% were female, and among control participants, 48% to 60% were female. Genetically determined high-density lipoprotein (HDL) cholesterol concentrations were associated with increased odds of AD (OR per 1-SD increase, 1.10 [95% CI, 1.05-1.16]). Genetically determined high systolic blood pressure was associated with increased risk of AD after adjusting for diastolic blood pressure (OR per 10-mm Hg increase, 1.22 [95% CI, 1.02-1.46]). In a second analysis to minimize bias due to sample overlap, the entire UK Bio
Published: 2023
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22. Structural MRI predicts clinical progression in presymptomatic genetic frontotemporal dementia:Findings from the GENetic Frontotemporal dementia Initiative cohort

Author: Bocchetta, Martina, Todd, Emily G., Bouzigues, Arabella, Cash, David M., Nicholas, Jennifer M., Convery, Rhian S., Russell, Lucy L., Thomas, David L., Malone, Ian B., Iglesias, Juan Eugenio, Van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, De Mendonca, Alexandre, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, Rohrer, Jonathan D., Bocchetta, Martina, Todd, Emily G., Bouzigues, Arabella, Cash, David M., Nicholas, Jennifer M., Convery, Rhian S., Russell, Lucy L., Thomas, David L., Malone, Ian B., Iglesias, Juan Eugenio, Van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, De Mendonca, Alexandre, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, and Rohrer, Jonathan D.
Abstract: Biomarkers that can predict disease progression in individuals with genetic frontotemporal dementia are urgently needed. We aimed to identify whether baseline MRI-based grey and white matter abnormalities are associated with different clinical progression profiles in presymptomatic mutation carriers in the GENetic Frontotemporal dementia Initiative. Three hundred eighty-seven mutation carriers were included (160 GRN, 160 C9orf72, 67 MAPT), together with 240 non-carrier cognitively normal controls. Cortical and subcortical grey matter volumes were generated using automated parcellation methods on volumetric 3T T1-weighted MRI scans, while white matter characteristics were estimated using diffusion tensor imaging. Mutation carriers were divided into two disease stages based on their global CDR®+NACC-FTLD score: presymptomatic (0 or 0.5) and fully symptomatic (1 or greater). The w-scores in each grey matter volumes and white matter diffusion measures were computed to quantify the degree of abnormality compared to controls for each presymptomatic carrier, adjusting for their age, sex, total intracranial volume, and scanner type. Presymptomatic carriers were classified as 'normal' or 'abnormal' based on whether their grey matter volume and white matter diffusion measure w-scores were above or below the cut point corresponding to the 10th percentile of the controls. We then compared the change in disease severity between baseline and one year later in both the 'normal' and 'abnormal' groups within each genetic subtype, as measured by the CDR®+NACC-FTLD sum-of-boxes score and revised Cambridge Behavioural Inventory total score. Overall, presymptomatic carriers with normal regional w-scores at baseline did not progress clinically as much as those with abnormal regional w-scores. Having abnormal grey or white matter measures at baseline was associated with a statistically significant increase in the CDR®+NACC-FTLD of up to 4 points in C9orf72 expansion carriers, and 5 poi
Published: 2023

23. Genetic forms of primary progressive aphasia within the GENetic Frontotemporal dementia Initiative (GENFI) cohort:Comparison with sporadic primary progressive aphasia

Author: Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., Hardy, Chris, Van Swieten, John C., Seelaar, Harro, Jiskoot, Lize C., Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, De Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Warren, Jason D., Rohrer, Jonathan D., Russell, Lucy L., Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., Hardy, Chris, Van Swieten, John C., Seelaar, Harro, Jiskoot, Lize C., Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, De Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Warren, Jason D., Rohrer, Jonathan D., and Russell, Lucy L.
Abstract: Primary progressive aphasia is most commonly a sporadic disorder, but in some cases, it can be genetic. This study aimed to understand the clinical, cognitive and imaging phenotype of the genetic forms of primary progressive aphasia in comparison to the canonical nonfluent, semantic and logopenic subtypes seen in sporadic disease. Participants with genetic primary progressive aphasia were recruited from the international multicentre GENetic Frontotemporal dementia Initiative study and compared with healthy controls as well as a cohort of people with sporadic primary progressive aphasia. Symptoms were assessed using the GENetic Frontotemporal dementia Initiative language, behavioural, neuropsychiatric and motor scales. Participants also underwent a cognitive assessment and 3T volumetric T1-weighted MRI. One C9orf72 (2%), 1 MAPT (6%) and 17 GRN (44%) symptomatic mutation carriers had a diagnosis of primary progressive aphasia. In the GRN cohort, 47% had a diagnosis of nonfluent variant primary progressive aphasia, and 53% had a primary progressive aphasia syndrome that did not fit diagnostic criteria for any of the three subtypes, called primary progressive aphasia-not otherwise specified here. The phenotype of the genetic nonfluent variant primary progressive aphasia group largely overlapped with that of sporadic nonfluent variant primary progressive aphasia, although the presence of an associated atypical parkinsonian syndrome was characteristic of sporadic and not genetic disease. The primary progressive aphasia-not otherwise specified group however was distinct from the sporadic subtypes with impaired grammar/syntax in the presence of relatively intact articulation, alongside other linguistic deficits. The pattern of atrophy seen on MRI in the genetic nonfluent variant primary progressive aphasia group overlapped with that of the sporadic nonfluent variant primary progressive aphasia cohort, although with more posterior cortical involvement, whilst the primary
Published: 2023

24. Cerebellar and subcortical atrophy contribute to psychiatric symptoms in frontotemporal dementia

Author: Bussy, Aurélie, Levy, Jake P., Best, Tristin, Patel, Raihaan, Cupo, Lani, Van Langenhove, Tim, Nielsen, Jørgen E., Pijnenburg, Yolande, Waldö, Maria Landqvist, Remes, Anne M., Schroeter, Matthias L., Santana, Isabel, Pasquier, Florence, Otto, Markus, Danek, Adrian, Levin, Johannes, Le Ber, Isabelle, Vandenberghe, Rik, Synofzik, Matthis, Moreno, Fermin, de Mendonça, Alexandre, Sanchez-Valle, Raquel, Laforce, Robert, Langheinrich, Tobias, Gerhard, Alexander, Graff, Caroline, Butler, Chris R., Sorbi, Sandro, Jiskoot, Lize, Seelaar, Harro, van Swieten, John C., Finger, Elizabeth, Tartaglia, Maria Carmela, Masellis, Mario, Tiraboschi, Pietro, Galimberti, Daniela, Borroni, Barbara, Rowe, James B., Bocchetta, Martina, Rohrer, Jonathan D., Devenyi, Gabriel A., Chakravarty, M. Mallar, Ducharme, Simon, Esteve, Aitana Sogorb, Nelson, Annabel, Bouzigues, Arabella, Poos, Jackie, Papma, Janne M., Giannini, Lucia, van Minkelen, Rick, Bussy, Aurélie, Levy, Jake P., Best, Tristin, Patel, Raihaan, Cupo, Lani, Van Langenhove, Tim, Nielsen, Jørgen E., Pijnenburg, Yolande, Waldö, Maria Landqvist, Remes, Anne M., Schroeter, Matthias L., Santana, Isabel, Pasquier, Florence, Otto, Markus, Danek, Adrian, Levin, Johannes, Le Ber, Isabelle, Vandenberghe, Rik, Synofzik, Matthis, Moreno, Fermin, de Mendonça, Alexandre, Sanchez-Valle, Raquel, Laforce, Robert, Langheinrich, Tobias, Gerhard, Alexander, Graff, Caroline, Butler, Chris R., Sorbi, Sandro, Jiskoot, Lize, Seelaar, Harro, van Swieten, John C., Finger, Elizabeth, Tartaglia, Maria Carmela, Masellis, Mario, Tiraboschi, Pietro, Galimberti, Daniela, Borroni, Barbara, Rowe, James B., Bocchetta, Martina, Rohrer, Jonathan D., Devenyi, Gabriel A., Chakravarty, M. Mallar, Ducharme, Simon, Esteve, Aitana Sogorb, Nelson, Annabel, Bouzigues, Arabella, Poos, Jackie, Papma, Janne M., Giannini, Lucia, and van Minkelen, Rick
Abstract: Recent studies have reported early cerebellar and subcortical impact in the disease progression of genetic frontotemporal dementia (FTD) due to microtubule-associated protein tau (MAPT), progranulin (GRN) and chromosome 9 open reading frame 72 (C9orf72). However, the cerebello-subcortical circuitry in FTD has been understudied despite its essential role in cognition and behaviors related to FTD symptomatology. The present study aims to investigate the association between cerebellar and subcortical atrophy, and neuropsychiatric symptoms across genetic mutations. Our study included 983 participants from the Genetic Frontotemporal dementia Initiative including mutation carriers and noncarrier first-degree relatives of known symptomatic carriers. Voxel-wise analysis of the thalamus, striatum, globus pallidus, amygdala, and the cerebellum was performed, and partial least squares analyses (PLS) were used to link morphometry and behavior. In presymptomatic C9orf72 expansion carriers, thalamic atrophy was found compared to noncarriers, suggesting the importance of this structure in FTD prodromes. PLS analyses demonstrated that the cerebello-subcortical circuitry is related to neuropsychiatric symptoms, with significant overlap in brain/behavior patterns, but also specificity for each genetic mutation group. The largest differences were in the cerebellar atrophy (larger extent in C9orf72 expansion group) and more prominent amygdalar volume reduction in the MAPT group. Brain scores in the C9orf72 expansion carriers and MAPT carriers demonstrated covariation patterns concordant with atrophy patterns detectable up to 20 years before expected symptom onset. Overall, these results demonstrated the important role of the subcortical structures in genetic FTD symptom expression, particularly the cerebellum in C9orf72 and the amygdala in MAPT carriers.
Published: 2023

25. Language impairment in the genetic forms of behavioural variant frontotemporal dementia

Author: Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Christopher R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Russell, Lucy L., Samra, Kiran, MacDougall, Amy M., Bouzigues, Arabella, Bocchetta, Martina, Cash, David M., Greaves, Caroline V., Convery, Rhian S., van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Christopher R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Tiraboschi, Pietro, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., and Russell, Lucy L.
Abstract: Background: Behavioural variant fronto-temporal dementia (bvFTD) is characterised by a progressive change in personality in association with atrophy of the frontal and temporal lobes. Whilst language impairment has been described in people with bvFTD, little is currently known about the extent or type of linguistic difficulties that occur, particularly in the genetic forms. Methods: Participants with genetic bvFTD along with healthy controls were recruited from the international multicentre Genetic FTD Initiative (GENFI). Linguistic symptoms were assessed using items from the Progressive Aphasia Severity Scale (PASS). Additionally, participants undertook the Boston Naming Test (BNT), modified Camel and Cactus Test (mCCT) and a category fluency test. Participants underwent a 3T volumetric T1-weighted MRI, with language network regional brain volumes measured and compared between the genetic groups and controls. Results: 76% of the genetic bvFTD cohort had impairment in at least one language symptom: 83% C9orf72, 80% MAPT and 56% GRN mutation carriers. All three genetic groups had significantly impaired functional communication, decreased fluency, and impaired sentence comprehension. C9orf72 mutation carriers also had significantly impaired articulation and word retrieval as well as dysgraphia whilst the MAPT mutation group also had impaired word retrieval and single word comprehension. All three groups had difficulties with naming, semantic knowledge and verbal fluency. Atrophy in key left perisylvian language regions differed between the groups, with generalised involvement in the C9orf72 group and more focal temporal and insula involvement in the other groups. Correlates of language symptoms and test scores also differed between the groups. Conclusions: Language deficits exist in a substantial proportion of people with familial bvFTD across all three genetic groups. Significant atrophy is seen in the dominant perisylvian language areas and correlates with langua
Published: 2023

26. Early neurotransmitters changes in prodromal frontotemporal dementia:A GENFI study

Author: Premi, Enrico, Pengo, Marta, Mattioli, Irene, Cantoni, Valentina, Dukart, Juergen, Gasparotti, Roberto, Buratti, Emanuele, Padovani, Alessandro, Bocchetta, Martina, Todd, Emily G., Bouzigues, Arabella, Cash, David M., Convery, Rhian S., Russell, Lucy L., Thomas, David L., van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Tsvetanov, Kamen A., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, de Mendonça, Alexandre, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, Rohrer, Jonathan D., Borroni, Barbara, Premi, Enrico, Pengo, Marta, Mattioli, Irene, Cantoni, Valentina, Dukart, Juergen, Gasparotti, Roberto, Buratti, Emanuele, Padovani, Alessandro, Bocchetta, Martina, Todd, Emily G., Bouzigues, Arabella, Cash, David M., Convery, Rhian S., Russell, Lucy L., Thomas, David L., van Swieten, John C., Jiskoot, Lize C., Seelaar, Harro, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Tsvetanov, Kamen A., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, de Mendonça, Alexandre, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, Rohrer, Jonathan D., and Borroni, Barbara
Abstract: Background: Neurotransmitters deficits in Frontotemporal Dementia (FTD) are still poorly understood. Better knowledge of neurotransmitters impairment, especially in prodromal disease stages, might tailor symptomatic treatment approaches. Methods: In the present study, we applied JuSpace toolbox, which allowed for cross-modal correlation of Magnetic Resonance Imaging (MRI)-based measures with nuclear imaging derived estimates covering various neurotransmitter systems including dopaminergic, serotonergic, noradrenergic, GABAergic and glutamatergic neurotransmission. We included 392 mutation carriers (157 GRN, 164 C9orf72, 71 MAPT), together with 276 non-carrier cognitively healthy controls (HC). We tested if the spatial patterns of grey matter volume (GMV) alterations in mutation carriers (relative to HC) are correlated with specific neurotransmitter systems in prodromal (CDR® plus NACC FTLD = 0.5) and in symptomatic (CDR® plus NACC FTLD≥1) FTD. Results: In prodromal stages of C9orf72 disease, voxel-based brain changes were significantly associated with spatial distribution of dopamine and acetylcholine pathways; in prodromal MAPT disease with dopamine and serotonin pathways, while in prodromal GRN disease no significant findings were reported (p < 0.05, Family Wise Error corrected). In symptomatic FTD, a widespread involvement of dopamine, serotonin, glutamate and acetylcholine pathways across all genetic subtypes was found. Social cognition scores, loss of empathy and poor response to emotional cues were found to correlate with the strength of GMV colocalization of dopamine and serotonin pathways (all p < 0.01). Conclusions: This study, indirectly assessing neurotransmitter deficits in monogenic FTD, provides novel insight into disease mechanisms and might suggest potential therapeutic targets to counteract disease-related symptoms.
Published: 2023

27. Temporal dynamics predict symptom onset and cognitive decline in familial frontotemporal dementia

Author: Whiteside, David J., Malpetti, Maura, Jones, P. Simon, Ghosh, Boyd C.P., Coyle-Gilchrist, Ian, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Butler, Chris R., Santana, Isabel, Ber, Isabelle Le, Gerhard, Alexander, Ducharme, Simon, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Pasquier, Florence, Bouzigues, Arabella, Russell, Lucy L., Rohrer, Jonathan D., Rowe, James B., Rittman, Timothy, Whiteside, David J., Malpetti, Maura, Jones, P. Simon, Ghosh, Boyd C.P., Coyle-Gilchrist, Ian, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Butler, Chris R., Santana, Isabel, Ber, Isabelle Le, Gerhard, Alexander, Ducharme, Simon, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Pasquier, Florence, Bouzigues, Arabella, Russell, Lucy L., Rohrer, Jonathan D., Rowe, James B., and Rittman, Timothy
Abstract: Introduction: We tested whether changes in functional networks predict cognitive decline and conversion from the presymptomatic prodrome to symptomatic disease in familial frontotemporal dementia (FTD). Methods: For hypothesis generation, 36 participants with behavioral variant FTD (bvFTD) and 34 controls were recruited from one site. For hypothesis testing, we studied 198 symptomatic FTD mutation carriers, 341 presymptomatic mutation carriers, and 329 family members without mutations. We compared functional network dynamics between groups, with clinical severity and with longitudinal clinical progression. Results: We identified a characteristic pattern of dynamic network changes in FTD, which correlated with neuropsychological impairment. Among presymptomatic mutation carriers, this pattern of network dynamics was found to a greater extent in those who subsequently converted to the symptomatic phase. Baseline network dynamic changes predicted future cognitive decline in symptomatic participants and older presymptomatic participants. Discussion: Dynamic network abnormalities in FTD predict cognitive decline and symptomatic conversion. Highlights: We investigated brain network predictors of dementia symptom onset Frontotemporal dementia results in characteristic dynamic network patterns Alterations in network dynamics are associated with neuropsychological impairment Network dynamic changes predict symptomatic conversion in presymptomatic carriers Network dynamic changes are associated with longitudinal cognitive decline.
Published: 2023

28. Patterns and implications of neurological examination findings in autosomal dominant Alzheimer disease

Author: Vöglein, Jonathan, Franzmeier, Nicolai, Morris, John C., Dieterich, Marianne, McDade, Eric, Simons, Mikael, Preische, Oliver, Hofmann, Anna, Hassenstab, Jason, Benzinger, Tammie L., Fagan, Anne, Noble, James M., Berman, Sarah B., Graff-Radford, Neill R., Ghetti, Bernardino, Farlow, Martin R., Chhatwal, Jasmeer P., Salloway, Stephen, Xiong, Chengjie, Karch, Celeste M., Cairns, Nigel, Perrin, Richard J., Day, Gregory, Martins, Ralph, Sanchez-Valle, Raquel, Mori, Hiroshi, Shimada, Hiroyuki, Ikeuchi, Takeshi, Suzuki, Kazushi, Schofield, Peter R., Masters, Colin L., Goate, Alison, Buckles, Virginia, Fox, Nick C., Chrem, Patricio, Allegri, Ricardo, Ringman, John M., Yakushev, Igor, Laske, Christoph, Jucker, Mathias, Höglinger, Günter, Bateman, Randall L., Danek, Adrian, Levin, Johannes, Dominantly Inherited Alzheimer Network, Vöglein, Jonathan, Franzmeier, Nicolai, Morris, John C., Dieterich, Marianne, McDade, Eric, Simons, Mikael, Preische, Oliver, Hofmann, Anna, Hassenstab, Jason, Benzinger, Tammie L., Fagan, Anne, Noble, James M., Berman, Sarah B., Graff-Radford, Neill R., Ghetti, Bernardino, Farlow, Martin R., Chhatwal, Jasmeer P., Salloway, Stephen, Xiong, Chengjie, Karch, Celeste M., Cairns, Nigel, Perrin, Richard J., Day, Gregory, Martins, Ralph, Sanchez-Valle, Raquel, Mori, Hiroshi, Shimada, Hiroyuki, Ikeuchi, Takeshi, Suzuki, Kazushi, Schofield, Peter R., Masters, Colin L., Goate, Alison, Buckles, Virginia, Fox, Nick C., Chrem, Patricio, Allegri, Ricardo, Ringman, John M., Yakushev, Igor, Laske, Christoph, Jucker, Mathias, Höglinger, Günter, Bateman, Randall L., Danek, Adrian, Levin, Johannes, and Dominantly Inherited Alzheimer Network
Abstract: Introduction: As knowledge about neurological examination findings in autosomal dominant Alzheimer disease (ADAD) is incomplete, we aimed to determine the frequency and significance of neurological examination findings in ADAD. Methods: Frequencies of neurological examination findings were compared between symptomatic mutation carriers and non mutation carriers from the Dominantly Inherited Alzheimer Network (DIAN) to define AD neurological examination findings. AD neurological examination findings were analyzed regarding frequency, association with and predictive value regarding cognitive decline, and association with brain atrophy in symptomatic mutation carriers. Results: AD neurological examination findings included abnormal deep tendon reflexes, gait disturbance, pathological cranial nerve examination findings, tremor, abnormal finger to nose and heel to shin testing, and compromised motor strength. The frequency of AD neurological examination findings was 65.1 %. Cross-sectionally, mutation carriers with AD neurological examination findings showed a more than two-fold faster cognitive decline and had greater parieto-temporal atrophy, including hippocampal atrophy. Longitudinally, AD neurological examination findings predicted a significantly greater decline over time. Discussion: ADAD features a distinct pattern of neurological examination findings that is useful to estimate prognosis and may inform clinical care and therapeutic trial designs.
Published: 2023

29. An Automated Toolbox to Predict Single Subject Atrophy in Presymptomatic Granulin Mutation Carriers

Author: Premi, Enrico, Costa, Tommaso, Gazzina, Stefano, Benussi, Alberto, Cauda, Franco, Gasparotti, Roberto, Archetti, Silvana, Alberici, Antonella, Van Swieten, John C., Sanchez-Valle, Raquel, Moreno, Fermin, Santana, Isabel, Laforce, Robert, Ducharme, Simon, Graff, Caroline, Galimberti, Daniela, Masellis, Mario, Tartaglia, Carmela, Rowe, James B., Finger, Elizabeth, Tagliavini, Fabrizio, De Mendonça, Alexandre, Vandenberghe, Rik, Gerhard, Alexander, Butler, Chris R., Danek, Adrian, Synofzik, Matthis, Levin, Johannes, Otto, Markus, Ghidoni, Roberta, Frisoni, Giovanni, Sorbi, Sandro, Peakman, Georgia, Todd, Emily, Bocchetta, Martina, Rohrer, Johnathan D., Borroni, Barbara, Premi, Enrico, Costa, Tommaso, Gazzina, Stefano, Benussi, Alberto, Cauda, Franco, Gasparotti, Roberto, Archetti, Silvana, Alberici, Antonella, Van Swieten, John C., Sanchez-Valle, Raquel, Moreno, Fermin, Santana, Isabel, Laforce, Robert, Ducharme, Simon, Graff, Caroline, Galimberti, Daniela, Masellis, Mario, Tartaglia, Carmela, Rowe, James B., Finger, Elizabeth, Tagliavini, Fabrizio, De Mendonça, Alexandre, Vandenberghe, Rik, Gerhard, Alexander, Butler, Chris R., Danek, Adrian, Synofzik, Matthis, Levin, Johannes, Otto, Markus, Ghidoni, Roberta, Frisoni, Giovanni, Sorbi, Sandro, Peakman, Georgia, Todd, Emily, Bocchetta, Martina, Rohrer, Johnathan D., and Borroni, Barbara
Abstract: Background: Magnetic resonance imaging (MRI) measures may be used as outcome markers in frontotemporal dementia (FTD). Objectives: To predict MRI cortical thickness (CT) at follow-up at the single subject level, using brain MRI acquired at baseline in preclinical FTD. Methods: 84 presymptomatic subjects carrying Granulin mutations underwent MRI scans at baseline and at follow-up (31.2±16.5 months). Multivariate nonlinear mixed-effects model was used for estimating individualized CT at follow-up based on baseline MRI data. The automated user-friendly preGRN-MRI script was coded. Results: Prediction accuracy was high for each considered brain region (i.e., prefrontal region, real CT at follow-up versus predicted CT at follow-up, mean error ≤1.87%). The sample size required to detect a reduction in decline in a 1-year clinical trial was equal to 52 subjects (power=0.80, alpha=0.05). Conclusion: The preGRN-MRI tool, using baseline MRI measures, was able to predict the expected MRI atrophy at follow-up in presymptomatic subjects carrying GRN mutations with good performances. This tool could be useful in clinical trials, where deviation of CT from the predicted model may be considered an effect of the intervention itself.
Published: 2022

30. A modified Camel and Cactus Test detects presymptomatic semantic impairment in genetic frontotemporal dementia within the GENFI cohort

Author: Moore, Katrina, Convery, Rhian, Bocchetta, Martina, Neason, Mollie, Cash, David M., Greaves, Caroline, Russell, Lucy L., Clarke, Mica T. M., Peakman, Georgia, van Swieten, John, Jiskoot, Lize, Moreno, Fermin, Barandiaran, Myriam, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Dore, Marie-Claire, Masellis, Mario, Tartaglia, Maria Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Karnath, Hans-Otto, Vandenberghe, Rik, de Mendonca, Alexandre, Maruta, Carolina, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris, Gerhard, Alex, Levin, Johannes, Danek, Adrian, Otto, Markus, Warren, Jason D., Rohrer, Jonathan D., Rossor, Martin N., Fox, Nick C., Woollacott, Ione O. C., Shafei, Rachelle, Heller, Carolin, Guerreiro, Rita, Bras, Jose, Thomas, David L., Nicholas, Jennifer, Mead, Simon, Meeter, Lieke, Panman, Jessica, Papma, Janne, van Minkelen, Rick, Pijnenburg, Yolande, Indakoetxea, Begona, Gabilondo, Alazne, Tainta, Mikel, de Arriba, Maria, Gorostidi, Ana, Zulaica, Miren, Villanua, Jorge, Diaz, Zigor, Borrego-Ecija, Sergi, Olives, Jaume, Llado, Albert, Balasa, Mircea, Antonell, Anna, Bargallo, Nuria, Premi, Enrico, Cosseddu, Maura, Gazzina, Stefano, Padovani, Alessandro, Gasparotti, Roberto, Archetti, Silvana, Black, Sandra, Mitchell, Sara, Rogaeva, Ekaterina, Freedman, Morris, Keren, Ron, Tang-Wa, David, Oijerstedt, Linn, Andersson, Christin, Jelic, Vesna, Thonberg, Hakan, Arighi, Andrea, Fenoglio, Chiara, Scarpini, Elio, Fumagalli, Giorgio, Cope, Thomas, Timberlake, Carolyn, Rittman, Timothy, Shoesmith, Christen, Bartha, Robart, Rademakers, Rosa, Wilke, Carlo, Bender, Benjamin, Bruffaerts, Rose, Van Damme, Philip, Vandenbulcke, Mathieu, Ferreira, Catarina B., Miltenberger, Gabriel, Verdelho, Ana, Afonso, Sonia, Taipa, Ricardo, Caroppo, Paola, Di Fede, Giuseppe, Giaccone, Giorgio, Prioni, Sara, Redaelli, Veronica, Rossi, Giacomina, Tiraboschi, Pietro, Duro, Diana, Almeida, Maria Rosario, Castelo-Branco, Miguel, Leitao, Maria Joao, Tabuas-Pereira, Miguel, Santiago, Beatriz, Gauthier, Serge, Rosa-Neto, Pedro, Veldsman, Michele, Flanagan, Toby, Prix, Catharina, Hoegen, Tobias, Wlasich, Elisabeth, Loosli, Sandra, Schonecker, Sonja, Semler, Elisa, Anderl-Straub, Sarah, Moore, Katrina, Convery, Rhian, Bocchetta, Martina, Neason, Mollie, Cash, David M., Greaves, Caroline, Russell, Lucy L., Clarke, Mica T. M., Peakman, Georgia, van Swieten, John, Jiskoot, Lize, Moreno, Fermin, Barandiaran, Myriam, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Dore, Marie-Claire, Masellis, Mario, Tartaglia, Maria Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Karnath, Hans-Otto, Vandenberghe, Rik, de Mendonca, Alexandre, Maruta, Carolina, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris, Gerhard, Alex, Levin, Johannes, Danek, Adrian, Otto, Markus, Warren, Jason D., Rohrer, Jonathan D., Rossor, Martin N., Fox, Nick C., Woollacott, Ione O. C., Shafei, Rachelle, Heller, Carolin, Guerreiro, Rita, Bras, Jose, Thomas, David L., Nicholas, Jennifer, Mead, Simon, Meeter, Lieke, Panman, Jessica, Papma, Janne, van Minkelen, Rick, Pijnenburg, Yolande, Indakoetxea, Begona, Gabilondo, Alazne, Tainta, Mikel, de Arriba, Maria, Gorostidi, Ana, Zulaica, Miren, Villanua, Jorge, Diaz, Zigor, Borrego-Ecija, Sergi, Olives, Jaume, Llado, Albert, Balasa, Mircea, Antonell, Anna, Bargallo, Nuria, Premi, Enrico, Cosseddu, Maura, Gazzina, Stefano, Padovani, Alessandro, Gasparotti, Roberto, Archetti, Silvana, Black, Sandra, Mitchell, Sara, Rogaeva, Ekaterina, Freedman, Morris, Keren, Ron, Tang-Wa, David, Oijerstedt, Linn, Andersson, Christin, Jelic, Vesna, Thonberg, Hakan, Arighi, Andrea, Fenoglio, Chiara, Scarpini, Elio, Fumagalli, Giorgio, Cope, Thomas, Timberlake, Carolyn, Rittman, Timothy, Shoesmith, Christen, Bartha, Robart, Rademakers, Rosa, Wilke, Carlo, Bender, Benjamin, Bruffaerts, Rose, Van Damme, Philip, Vandenbulcke, Mathieu, Ferreira, Catarina B., Miltenberger, Gabriel, Verdelho, Ana, Afonso, Sonia, Taipa, Ricardo, Caroppo, Paola, Di Fede, Giuseppe, Giaccone, Giorgio, Prioni, Sara, Redaelli, Veronica, Rossi, Giacomina, Tiraboschi, Pietro, Duro, Diana, Almeida, Maria Rosario, Castelo-Branco, Miguel, Leitao, Maria Joao, Tabuas-Pereira, Miguel, Santiago, Beatriz, Gauthier, Serge, Rosa-Neto, Pedro, Veldsman, Michele, Flanagan, Toby, Prix, Catharina, Hoegen, Tobias, Wlasich, Elisabeth, Loosli, Sandra, Schonecker, Sonja, Semler, Elisa, and Anderl-Straub, Sarah
Abstract: Impaired semantic knowledge is a characteristic feature of some forms of frontotemporal dementia (FTD), particularly the sporadic disorder semantic dementia. Less is known about semantic cognition in the genetic forms of FTD caused by mutations in the genes MAPT, C9orf72, and GRN. We developed a modified version of the Camel and Cactus Test (mCCT) to investigate the presence of semantic difficulties in a large genetic FTD cohort from the Genetic FTD Initiative (GENFI) study. Six-hundred-forty-four participants were tested with the mCCT including 67 MAPT mutation carriers (15 symptomatic, and 52 in the presymptomatic period), 165 GRN mutation carriers (33 symptomatic, 132 presymptomatic), and 164 C9orf72 mutation carriers (56 symptomatic, 108 presymptomatic) and 248 mutation-negative members of FTD families who acted as a control group. The presymptomatic mutation carriers were further split into those early and late in the presymptomatic period (more than vs. within 10 years of expected symptom onset). Groups were compared using a linear regression model, adjusting for age and education, with bootstrapping. Performance on the mCCT had a weak negative correlation with age (rho = -0.20) and a weak positive correlation with education (rho = 0.13), with an overall abnormal score (below the 5th percentile of the control population) being below 27 out of a total of 32. All three of the symptomatic mutation groups scored significantly lower than controls: MAPT mean 22.3 (standard deviation 8.0), GRN 24.4 (7.2), C9orf72 23.6 (6.5) and controls 30.2 (1.6). However, in the presymptomatic groups, only the late MAPT and late C9orf72 mutation groups scored lower than controls (28.8 (2.2) and 28.9 (2.5) respectively). Performance on the mCCT correlated strongly with temporal lobe volume in the symptomatic MAPT mutation group (rho > 0.80). In the C9orf72 group, mCCT score correlated with both bilateral temporal lobe volume (rho > 0.31) and bilateral frontal lobe volume (rho
Published: 2022

31. New insights into the genetic etiology of Alzheimer's disease and related dementias

Author: Bellenguez, Celine, Kucukali, Fahri, Jansen, Iris E., Kleineidam, Luca, Moreno-Grau, Sonia, Amin, Najaf, Naj, Adam C., Campos-Martin, Rafael, Grenier-Boley, Benjamin, Andrade, Victor, Holmans, Peter A., Boland, Anne, Damotte, Vincent, van der Lee, Sven J., Costa, Marcos R., Kuulasmaa, Teemu, Yang, Qiong, De Rojas, Itziar, Bis, Joshua C., Yaqub, Amber, Prokic, Ivana, Chapuis, Julien, Ahmad, Shahzad, Giedraitis, Vilmantas, Aarsland, Dag, Garcia-Gonzalez, Pablo, Abdelnour, Carla, Alarcon-Martin, Emilio, Alcolea, Daniel, Alegret, Montserrat, Alvarez, Ignacio, Alvarez, Victoria, Armstrong, Nicola J., Tsolaki, Anthoula, Antunez, Carmen, Appollonio, Ildebrando, Arcaro, Marina, Archetti, Silvana, Arias Pastor, Alfonso, Arosio, Beatrice, Athanasiu, Lavinia, Bailly, Henri, Banaj, Nerisa, Baquero, Miquel, Barral, Sandra, Beiser, Alexa, Pastor, Ana Belen, Below, Jennifer E., Benchek, Penelope, Benussi, Luisa, Berr, Claudine, Besse, Celine, Bessi, Valentina, Binetti, Giuliano, Bizarro, Alessandra, Blesa, Rafael, Boada, Merce, Boerwinkle, Eric, Borroni, Barbara, Boschi, Silvia, Bossu, Paola, Brathen, Geir, Bressler, Jan, Bresner, Catherine, Brodaty, Henry, Brookes, Keeley J., Ignacio Brusco, Luis, Buiza-Rueda, Dolores, Burger, Katharina, Burholt, Vanessa, Bush, William S., Calero, Miguel, Cantwell, Laura B., Chene, Genevieve, Chung, Jaeyoon, Cuccaro, Michael L., Cecchetti, Roberta, Cervera-Carles, Laura, Charbonnier, Camille, Chen, Hung-Hsin, Chillotti, Caterina, Ciccone, Simona, Claassen, Jurgen A. H. R., Clark, Christopher, Conti, Elisa, Corma-Gomez, Anais, Costantini, Emanuele, Custodero, Carlo, Daian, Delphine, Dalmasso, Maria Carolina, Daniele, Antonio, Dardiotis, Efthimios, Dartigues, Jean-Francois, de Deyn, Peter Paul, Lopes, Katia de Paiva, De Witte, Lot D., Debette, Stephanie, Deckert, Jurgen, del Ser, Teodoro, Denning, Nicola, Destefano, Anita, Dichgans, Martin, Diehl-Schmid, Janine, Diez-Fairen, Monica, Rossi, Paolo Dionigi, Djurovic, Srdjan, Duron, Emmanuelle, Duzel, Emrah, Dufouil, Carole, Eiriksdottir, Gudny, Engelborghs, Sebastiaan, Escott-Price, Valentina, Espinosa, Ana, Ewers, Michael, Faber, Kelley M., Fabrizio, Tagliavini, Nielsen, Sune Fallgaard, Fardo, David W., Farotti, Lucia, Fenoglio, Chiara, Fernandez-Fuertes, Marta, Ferrari, Raffaele, Ferreira, Catarina B., Ferri, Evelyn, Fin, Bertrand, Fischer, Peter, Fladby, Tormod, Fliessbach, Klaus, Fongang, Bernard, Fornage, Myriam, Fortea, Juan, Foroud, Tatiana M., Fostinelli, Silvia, Fox, Nick C., Franco-Macias, Emlio, Bullido, Maria J., Frank-Garcia, Ana, Froelich, Lutz, Fulton-Howard, Brian, Galimberti, Daniela, Maria Garcia-Alberca, Jose, Garcia-Madrona, Sebastian, Garcia-Ribas, Guillermo, Ghidoni, Roberta, Giegling, Ina, Giorgio, Giaccone, Goate, Alison M., Goldhardt, Oliver, Gomez-Fonseca, Duber, Gonzalez-Perez, Antonio, Graff, Caroline, Grande, Giulia, Green, Emma, Grimmer, Timo, Grunblatt, Edna, Grunin, Michelle, Gudnason, Vilmundur, Guetta-Baranes, Tamar, Haapasalo, Annakaisa, Hadjigeorgiou, Georgios, Haines, Jonathan L., Hamilton-Nelson, Kara L., Hampel, Harald, Hanon, Olivier, Hardy, John, Hartmann, Annette M., Hausner, Lucrezia, Harwood, Janet, Heilmann-Heimbach, Stefanie, Helisalmi, Seppo, Heneka, Michael T., Hernandez, Isabel, Herrmann, Martin J., Hoffmann, Per, Holmes, Clive, Holstege, Henne, Huerto Vilas, Raquel, Hulsman, Marc, Humphrey, Jack, Biessels, Geert Jan, Jian, Xueqiu, Johansson, Charlotte, Jun, Gyungah R., Kastumata, Yuriko, Kauwe, John, Kehoe, Patrick G., Kilander, Lena, Stahlbom, Anne Kinhult, Kivipelto, Miia, Koivisto, Anne, Kornhuber, Johannes, Kosmidis, Mary H., Kukull, Walter A., Kuksa, Pavel P., Kunkle, Brian W., Kuzma, Amanda B., Lage, Carmen, Laukka, Erika J., Launer, Lenore, Lauria, Alessandra, Lee, Chien-Yueh, Lehtisalo, Jenni, Lerch, Ondrej, Lleo, Alberto, Longstreth, William, Jr., Lopez, Oscar, Lopez de Munain, Adolfo, Love, Seth, Lowemark, Malin, Luckcuck, Lauren, Lunetta, Kathryn L., Ma, Yiyi, Macias, Juan, Macleod, Catherine A., Maier, Wolfgang, Mangialasche, Francesca, Spallazzi, Marco, Marquie, Marta, Marshall, Rachel, Martin, Eden R., Martin Montes, Angel, Martinez Rodriguez, Carmen, Masullo, Carlo, Mayeux, Richard, Mead, Simon, Mecocci, Patrizia, Medina, Miguel, Meggy, Alun, Mehrabian, Shima, Mendoza, Silvia, Menendez-Gonzalez, Manuel, Mir, Pablo, Moebus, Susanne, Mol, Merel, Molina-Porcel, Laura, Montrreal, Laura, Morelli, Laura, Moreno, Fermin, Morgan, Kevin, Mosley, Thomas, Nothen, Markus M., Muchnik, Carolina, Mukherjee, Shubhabrata, Nacmias, Benedetta, Ngandu, Tiia, Nicolas, Gael, Nordestgaard, Borge G., Olaso, Robert, Orellana, Adelina, Orsini, Michela, Ortega, Gemma, Padovani, Alessandro, Paolo, Caffarra, Papenberg, Goran, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peloso, Gina, Perez-Cordon, Alba, Perez-Tur, Jordi, Pericard, Pierre, Peters, Oliver, Pijnenburg, Yolande A. L., Pineda, Juan A., Pinol-Ripoll, Gerard, Pisanu, Laudia, Polak, Thomas, Popp, Julius, Posthuma, Danielle, Priller, Josef, Puerta, Raquel, Quenez, Olivier, Quintela, Ines, Thomassen, Jesper Qvist, Rabano, Alberto, Rainero, Innocenzo, Rajabli, Farid, Ramakers, Inez, Real, Luis M., Reinders, Marcel J. T., Reitz, Christiane, Reyes-Dumeyer, Dolly, Ridge, Perry, Riedel-Heller, Steffi, Riederer, Peter, Roberto, Natalia, Rodriguez-Rodriguez, Eloy, Rongve, Arvid, Rosas Allende, Irene, Rosende-Roca, Maitee, Luis Royo, Jose, Rubino, Elisa, Rujescu, Dan, Eugenia Saez, Maria, Sakka, Paraskevi, Saltvedt, Ingvild, Bernal Sanchez-Arjona, Maria, Sanchez-Garcia, Florentino, Sanchez Juan, Pascual, Sanchez-Valle, Raquel, Sando, Sigrid B., Sarnowski, Chloe, Satizabal, Claudia L., Scamosci, Michela, Scarmeas, Nikolaos, Scarpini, Elio, Scheltens, Philip, Scherbaum, Norbert, Scherer, Martin, Schmid, Matthias, Schneider, Anja, Schott, Jonathan M., Selbaek, Geir, Seripa, Davide, Serrano, Manuel, Sha, Jin, Shadrin, Alexey A., Skrobot, Olivia, Slifer, Susan, Snijders, Gijsje J. L., Soininen, Hilkka, Solfrizzi, Vincenzo, Solomon, Alina, Song, Yeunjoo, Sorbi, Sandro, Sotolongo-Grau, Oscar, Spalletta, Gianfranco, Spottke, Annika, Squassina, Alessio, Stordal, Eystein, Pablo Tartan, Juan, Tarraga, Lluis, Tesi, Niccolo, Thalamuthu, Anbupalam, Thomas, Tegos, Tosto, Giuseppe, Traykov, Latchezar, Tremolizzo, Lucio, Tybjaerg-Hansen, Anne, Uitterlinden, Andre, Ullgren, Abbe, Ulstein, Ingun, Valero, Sergi, Valladares, Otto, Van Broeckhoven, Christine, Vance, Jeffery, Vardarajan, Badri N., van der Lugt, Aad, Van Dongen, Jasper, van Rooij, Jeroen, van Swieten, John, Vandenberghe, Rik, Verhey, Frans, Vidal, Jean-Sebastien, Vogelgsang, Jonathan, Vyhnalek, Martin, Wagner, Michael, Wallon, David, Wang, Li-San, Wang, Ruiqi, Weinhold, Leonie, Wiltfang, Jens, Windle, Gill, Woods, Bob, Yannakoulia, Mary, Zare, Habil, Zhao, Yi, Zhang, Xiaoling, Zhu, Congcong, Zulaica, Miren, Farrer, Lindsay A., Psaty, Bruce M., Ghanbari, Mohsen, Raj, Towfique, Sachdev, Perminder, Mather, Karen, Jessen, Frank, Ikram, M. Arfan, de Mendonca, Alexandre, Hort, Jakub, Tsolaki, Magda, Pericak-Vance, Margaret A., Amouyel, Philippe, Williams, Julie, Frikke-Schmidt, Ruth, Clarimon, Jordi, Deleuze, Jean-Francois, Rossi, Giacomina, Seshadri, Sudha, Andreassen, Ole A., Ingelsson, Martin, Hiltunen, Mikko, Sleegers, Kristel, Schellenberg, Gerard D., van Duijn, Cornelia M., Sims, Rebecca, van der Flier, Wiesje M., Ruiz, Agustin, Ramirez, Alfredo, Lambert, Jean-Charles, Bellenguez, Celine, Kucukali, Fahri, Jansen, Iris E., Kleineidam, Luca, Moreno-Grau, Sonia, Amin, Najaf, Naj, Adam C., Campos-Martin, Rafael, Grenier-Boley, Benjamin, Andrade, Victor, Holmans, Peter A., Boland, Anne, Damotte, Vincent, van der Lee, Sven J., Costa, Marcos R., Kuulasmaa, Teemu, Yang, Qiong, De Rojas, Itziar, Bis, Joshua C., Yaqub, Amber, Prokic, Ivana, Chapuis, Julien, Ahmad, Shahzad, Giedraitis, Vilmantas, Aarsland, Dag, Garcia-Gonzalez, Pablo, Abdelnour, Carla, Alarcon-Martin, Emilio, Alcolea, Daniel, Alegret, Montserrat, Alvarez, Ignacio, Alvarez, Victoria, Armstrong, Nicola J., Tsolaki, Anthoula, Antunez, Carmen, Appollonio, Ildebrando, Arcaro, Marina, Archetti, Silvana, Arias Pastor, Alfonso, Arosio, Beatrice, Athanasiu, Lavinia, Bailly, Henri, Banaj, Nerisa, Baquero, Miquel, Barral, Sandra, Beiser, Alexa, Pastor, Ana Belen, Below, Jennifer E., Benchek, Penelope, Benussi, Luisa, Berr, Claudine, Besse, Celine, Bessi, Valentina, Binetti, Giuliano, Bizarro, Alessandra, Blesa, Rafael, Boada, Merce, Boerwinkle, Eric, Borroni, Barbara, Boschi, Silvia, Bossu, Paola, Brathen, Geir, Bressler, Jan, Bresner, Catherine, Brodaty, Henry, Brookes, Keeley J., Ignacio Brusco, Luis, Buiza-Rueda, Dolores, Burger, Katharina, Burholt, Vanessa, Bush, William S., Calero, Miguel, Cantwell, Laura B., Chene, Genevieve, Chung, Jaeyoon, Cuccaro, Michael L., Cecchetti, Roberta, Cervera-Carles, Laura, Charbonnier, Camille, Chen, Hung-Hsin, Chillotti, Caterina, Ciccone, Simona, Claassen, Jurgen A. H. R., Clark, Christopher, Conti, Elisa, Corma-Gomez, Anais, Costantini, Emanuele, Custodero, Carlo, Daian, Delphine, Dalmasso, Maria Carolina, Daniele, Antonio, Dardiotis, Efthimios, Dartigues, Jean-Francois, de Deyn, Peter Paul, Lopes, Katia de Paiva, De Witte, Lot D., Debette, Stephanie, Deckert, Jurgen, del Ser, Teodoro, Denning, Nicola, Destefano, Anita, Dichgans, Martin, Diehl-Schmid, Janine, Diez-Fairen, Monica, Rossi, Paolo Dionigi, Djurovic, Srdjan, Duron, Emmanuelle, Duzel, Emrah, Dufouil, Carole, Eiriksdottir, Gudny, Engelborghs, Sebastiaan, Escott-Price, Valentina, Espinosa, Ana, Ewers, Michael, Faber, Kelley M., Fabrizio, Tagliavini, Nielsen, Sune Fallgaard, Fardo, David W., Farotti, Lucia, Fenoglio, Chiara, Fernandez-Fuertes, Marta, Ferrari, Raffaele, Ferreira, Catarina B., Ferri, Evelyn, Fin, Bertrand, Fischer, Peter, Fladby, Tormod, Fliessbach, Klaus, Fongang, Bernard, Fornage, Myriam, Fortea, Juan, Foroud, Tatiana M., Fostinelli, Silvia, Fox, Nick C., Franco-Macias, Emlio, Bullido, Maria J., Frank-Garcia, Ana, Froelich, Lutz, Fulton-Howard, Brian, Galimberti, Daniela, Maria Garcia-Alberca, Jose, Garcia-Madrona, Sebastian, Garcia-Ribas, Guillermo, Ghidoni, Roberta, Giegling, Ina, Giorgio, Giaccone, Goate, Alison M., Goldhardt, Oliver, Gomez-Fonseca, Duber, Gonzalez-Perez, Antonio, Graff, Caroline, Grande, Giulia, Green, Emma, Grimmer, Timo, Grunblatt, Edna, Grunin, Michelle, Gudnason, Vilmundur, Guetta-Baranes, Tamar, Haapasalo, Annakaisa, Hadjigeorgiou, Georgios, Haines, Jonathan L., Hamilton-Nelson, Kara L., Hampel, Harald, Hanon, Olivier, Hardy, John, Hartmann, Annette M., Hausner, Lucrezia, Harwood, Janet, Heilmann-Heimbach, Stefanie, Helisalmi, Seppo, Heneka, Michael T., Hernandez, Isabel, Herrmann, Martin J., Hoffmann, Per, Holmes, Clive, Holstege, Henne, Huerto Vilas, Raquel, Hulsman, Marc, Humphrey, Jack, Biessels, Geert Jan, Jian, Xueqiu, Johansson, Charlotte, Jun, Gyungah R., Kastumata, Yuriko, Kauwe, John, Kehoe, Patrick G., Kilander, Lena, Stahlbom, Anne Kinhult, Kivipelto, Miia, Koivisto, Anne, Kornhuber, Johannes, Kosmidis, Mary H., Kukull, Walter A., Kuksa, Pavel P., Kunkle, Brian W., Kuzma, Amanda B., Lage, Carmen, Laukka, Erika J., Launer, Lenore, Lauria, Alessandra, Lee, Chien-Yueh, Lehtisalo, Jenni, Lerch, Ondrej, Lleo, Alberto, Longstreth, William, Jr., Lopez, Oscar, Lopez de Munain, Adolfo, Love, Seth, Lowemark, Malin, Luckcuck, Lauren, Lunetta, Kathryn L., Ma, Yiyi, Macias, Juan, Macleod, Catherine A., Maier, Wolfgang, Mangialasche, Francesca, Spallazzi, Marco, Marquie, Marta, Marshall, Rachel, Martin, Eden R., Martin Montes, Angel, Martinez Rodriguez, Carmen, Masullo, Carlo, Mayeux, Richard, Mead, Simon, Mecocci, Patrizia, Medina, Miguel, Meggy, Alun, Mehrabian, Shima, Mendoza, Silvia, Menendez-Gonzalez, Manuel, Mir, Pablo, Moebus, Susanne, Mol, Merel, Molina-Porcel, Laura, Montrreal, Laura, Morelli, Laura, Moreno, Fermin, Morgan, Kevin, Mosley, Thomas, Nothen, Markus M., Muchnik, Carolina, Mukherjee, Shubhabrata, Nacmias, Benedetta, Ngandu, Tiia, Nicolas, Gael, Nordestgaard, Borge G., Olaso, Robert, Orellana, Adelina, Orsini, Michela, Ortega, Gemma, Padovani, Alessandro, Paolo, Caffarra, Papenberg, Goran, Parnetti, Lucilla, Pasquier, Florence, Pastor, Pau, Peloso, Gina, Perez-Cordon, Alba, Perez-Tur, Jordi, Pericard, Pierre, Peters, Oliver, Pijnenburg, Yolande A. L., Pineda, Juan A., Pinol-Ripoll, Gerard, Pisanu, Laudia, Polak, Thomas, Popp, Julius, Posthuma, Danielle, Priller, Josef, Puerta, Raquel, Quenez, Olivier, Quintela, Ines, Thomassen, Jesper Qvist, Rabano, Alberto, Rainero, Innocenzo, Rajabli, Farid, Ramakers, Inez, Real, Luis M., Reinders, Marcel J. T., Reitz, Christiane, Reyes-Dumeyer, Dolly, Ridge, Perry, Riedel-Heller, Steffi, Riederer, Peter, Roberto, Natalia, Rodriguez-Rodriguez, Eloy, Rongve, Arvid, Rosas Allende, Irene, Rosende-Roca, Maitee, Luis Royo, Jose, Rubino, Elisa, Rujescu, Dan, Eugenia Saez, Maria, Sakka, Paraskevi, Saltvedt, Ingvild, Bernal Sanchez-Arjona, Maria, Sanchez-Garcia, Florentino, Sanchez Juan, Pascual, Sanchez-Valle, Raquel, Sando, Sigrid B., Sarnowski, Chloe, Satizabal, Claudia L., Scamosci, Michela, Scarmeas, Nikolaos, Scarpini, Elio, Scheltens, Philip, Scherbaum, Norbert, Scherer, Martin, Schmid, Matthias, Schneider, Anja, Schott, Jonathan M., Selbaek, Geir, Seripa, Davide, Serrano, Manuel, Sha, Jin, Shadrin, Alexey A., Skrobot, Olivia, Slifer, Susan, Snijders, Gijsje J. L., Soininen, Hilkka, Solfrizzi, Vincenzo, Solomon, Alina, Song, Yeunjoo, Sorbi, Sandro, Sotolongo-Grau, Oscar, Spalletta, Gianfranco, Spottke, Annika, Squassina, Alessio, Stordal, Eystein, Pablo Tartan, Juan, Tarraga, Lluis, Tesi, Niccolo, Thalamuthu, Anbupalam, Thomas, Tegos, Tosto, Giuseppe, Traykov, Latchezar, Tremolizzo, Lucio, Tybjaerg-Hansen, Anne, Uitterlinden, Andre, Ullgren, Abbe, Ulstein, Ingun, Valero, Sergi, Valladares, Otto, Van Broeckhoven, Christine, Vance, Jeffery, Vardarajan, Badri N., van der Lugt, Aad, Van Dongen, Jasper, van Rooij, Jeroen, van Swieten, John, Vandenberghe, Rik, Verhey, Frans, Vidal, Jean-Sebastien, Vogelgsang, Jonathan, Vyhnalek, Martin, Wagner, Michael, Wallon, David, Wang, Li-San, Wang, Ruiqi, Weinhold, Leonie, Wiltfang, Jens, Windle, Gill, Woods, Bob, Yannakoulia, Mary, Zare, Habil, Zhao, Yi, Zhang, Xiaoling, Zhu, Congcong, Zulaica, Miren, Farrer, Lindsay A., Psaty, Bruce M., Ghanbari, Mohsen, Raj, Towfique, Sachdev, Perminder, Mather, Karen, Jessen, Frank, Ikram, M. Arfan, de Mendonca, Alexandre, Hort, Jakub, Tsolaki, Magda, Pericak-Vance, Margaret A., Amouyel, Philippe, Williams, Julie, Frikke-Schmidt, Ruth, Clarimon, Jordi, Deleuze, Jean-Francois, Rossi, Giacomina, Seshadri, Sudha, Andreassen, Ole A., Ingelsson, Martin, Hiltunen, Mikko, Sleegers, Kristel, Schellenberg, Gerard D., van Duijn, Cornelia M., Sims, Rebecca, van der Flier, Wiesje M., Ruiz, Agustin, Ramirez, Alfredo, and Lambert, Jean-Charles
Abstract: Characterization of the genetic landscape of Alzheimer's disease (AD) and related dementias (ADD) provides a unique opportunity for a better understanding of the associated pathophysiological processes. We performed a two-stage genome-wide association study totaling 111,326 clinically diagnosed/'proxy' AD cases and 677,663 controls. We found 75 risk loci, of which 42 were new at the time of analysis. Pathway enrichment analyses confirmed the involvement of amyloid/tau pathways and highlighted microglia implication. Gene prioritization in the new loci identified 31 genes that were suggestive of new genetically associated processes, including the tumor necrosis factor alpha pathway through the linear ubiquitin chain assembly complex. We also built a new genetic risk score associated with the risk of future AD/dementia or progression from mild cognitive impairment to AD/dementia. The improvement in prediction led to a 1.6- to 1.9-fold increase in AD risk from the lowest to the highest decile, in addition to effects of age and the APOE epsilon 4 allele. Meta-analysis of genome-wide association studies on Alzheimer's disease and related dementias identifies new loci and enables generation of a new genetic risk score associated with the risk of future Alzheimer's disease and dementia.
Published: 2022

32. The CBI-R detects early behavioural impairment in genetic frontotemporal dementia

Author: Nelson, Annabel, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., Bouzigues, Arabella, Greaves, Caroline V., Bocchetta, Martina, Cash, David M., van Swieten, John C., Jiskoot, Lize, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Nelson, Annabel, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., Bouzigues, Arabella, Greaves, Caroline V., Bocchetta, Martina, Cash, David M., van Swieten, John C., Jiskoot, Lize, Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, de Mendonça, Alexandre, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Le Ber, Isabelle, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Otto, Markus, Sorbi, Sandro, and Rohrer, Jonathan D.
Abstract: Introduction: Behavioural dysfunction is a key feature of genetic frontotemporal dementia (FTD) but validated clinical scales measuring behaviour are lacking at present. Methods: We assessed behaviour using the revised version of the Cambridge Behavioural Inventory (CBI-R) in 733 participants from the Genetic FTD Initiative study: 466 mutation carriers (195 C9orf72, 76 MAPT, 195 GRN) and 267 non-mutation carriers (controls). All mutation carriers were stratified according to their global CDR plus NACC FTLD score into three groups: asymptomatic (CDR = 0), prodromal (CDR = 0.5) and symptomatic (CDR = 1+). Mixed-effects models adjusted for age, education, sex and family clustering were used to compare between the groups. Neuroanatomical correlates of the individual domains were assessed within each genetic group. Results: CBI-R total scores were significantly higher in all CDR 1+ mutation carrier groups compared with controls [C9orf72 mean 70.5 (standard deviation 27.8), GRN 56.2 (33.5), MAPT 62.1 (36.9)] as well as their respective CDR 0.5 groups [C9orf72 13.5 (14.4), GRN 13.3 (13.5), MAPT 9.4 (10.4)] and CDR 0 groups [C9orf72 6.0 (7.9), GRN 3.6 (6.0), MAPT 8.5 (13.3)]. The C9orf72 and GRN 0.5 groups scored significantly higher than the controls. The greatest impairment was seen in the Motivation domain for the C9orf72 and GRN symptomatic groups, whilst in the symptomatic MAPTgroup, the highest-scoring domains were Stereotypic and Motor Behaviours and Memory and Orientation. Neural correlates of each CBI-R domain largely overlapped across the different mutation carrier groups. Conclusions: The CBI-R detects early behavioural change in genetic FTD, suggesting that it could be a useful measure within future clinical trials.
Published: 2022

33. Practice effects in genetic frontotemporal dementia and at-risk individuals:a GENFI study

Author: Oijerstedt, Linn, Andersson, Christin, Jelic, Vesna, van Swieten, John Cornelis, Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Synofzik, Matthis, Galimberti, Daniela, Rowe, James Benedict, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonca, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Christopher R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Frisoni, Giovanni, Ghidoni, Roberta, Sorbi, Sandro, Rohrer, Jonathan Daniel, Graff, Caroline, Oijerstedt, Linn, Andersson, Christin, Jelic, Vesna, van Swieten, John Cornelis, Jiskoot, Lize C., Seelaar, Harro, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Synofzik, Matthis, Galimberti, Daniela, Rowe, James Benedict, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, de Mendonca, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Christopher R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Frisoni, Giovanni, Ghidoni, Roberta, Sorbi, Sandro, Rohrer, Jonathan Daniel, and Graff, Caroline
Published: 2022

34. A data-driven disease progression model of fluid biomarkers in genetic frontotemporal dementia

Author: van der Ende, Emma L., Bron, Esther E., Poos, Jackie M., Jiskoot, Lize C., Panman, Jessica L., Papma, Janne M., Meeter, Lieke H., Dopper, Elise G.P., Wilke, Carlo, Synofzik, Matthis, Heller, Carolin, Swift, Imogen J., Sogorb-Esteve, Aitana, Bouzigues, Arabella, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Graff, Caroline, Laforce, Robert, Galimberti, Daniela, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, Rowe, James B., de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Christopher R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Pijnenburg, Yolande A.L., Sorbi, Sandro, Zetterberg, Henrik, Niessen, Wiro J., Rohrer, Jonathan D., Klein, Stefan, van Swieten, John C., Venkatraghavan, Vikram, Seelaar, Harro, van der Ende, Emma L., Bron, Esther E., Poos, Jackie M., Jiskoot, Lize C., Panman, Jessica L., Papma, Janne M., Meeter, Lieke H., Dopper, Elise G.P., Wilke, Carlo, Synofzik, Matthis, Heller, Carolin, Swift, Imogen J., Sogorb-Esteve, Aitana, Bouzigues, Arabella, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Graff, Caroline, Laforce, Robert, Galimberti, Daniela, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, Vandenberghe, Rik, Rowe, James B., de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Christopher R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Pijnenburg, Yolande A.L., Sorbi, Sandro, Zetterberg, Henrik, Niessen, Wiro J., Rohrer, Jonathan D., Klein, Stefan, van Swieten, John C., Venkatraghavan, Vikram, and Seelaar, Harro
Abstract: Several CSF and blood biomarkers for genetic frontotemporal dementia have been proposed, including those reflecting neuroaxonal loss (neurofilament light chain and phosphorylated neurofilament heavy chain), synapse dysfunction [neuronal pentraxin 2 (NPTX2)], astrogliosis (glial fibrillary acidic protein) and complement activation (C1q, C3b). Determining the sequence in which biomarkers become abnormal over the course of disease could facilitate disease staging and help identify mutation carriers with prodromal or early-stage frontotemporal dementia, which is especially important as pharmaceutical trials emerge. We aimed to model the sequence of biomarker abnormalities in presymptomatic and symptomatic genetic frontotemporal dementia using cross-sectional data from the Genetic Frontotemporal dementia Initiative (GENFI), a longitudinal cohort study. Two-hundred and seventy-five presymptomatic and 127 symptomatic carriers of mutations in GRN, C9orf72 or MAPT, as well as 247 non-carriers, were selected from the GENFI cohort based on availability of one or more of the aforementioned biomarkers. Nine presymptomatic carriers developed symptoms within 18 months of sample collection ('converters'). Sequences of biomarker abnormalities were modelled for the entire group using discriminative event-based modelling (DEBM) and for each genetic subgroup using co-initialized DEBM. These models estimate probabilistic biomarker abnormalities in a data-driven way and do not rely on previous diagnostic information or biomarker cut-off points. Using cross-validation, subjects were subsequently assigned a disease stage based on their position along the disease progression timeline. CSF NPTX2 was the first biomarker to become abnormal, followed by blood and CSF neurofilament light chain, blood phosphorylated neurofilament heavy chain, blood glial fibrillary acidic protein and finally CSF C3b and C1q. Biomarker orderings did not differ significantly between genetic subgroups, but more u
Published: 2022

35. Conceptual framework for the definition of preclinical and prodromal frontotemporal dementia

Author: Benussi, Alberto, Alberici, Antonella, Samra, Kiran, Russell, Lucy L., Greaves, Caroline V., Bocchetta, Martina, Ducharme, Simon, Finger, Elizabeth, Fumagalli, Giorgio, Galimberti, Daniela, Jiskoot, Lize C., Le Ber, Isabelle, Masellis, Mario, Nacmias, Benedetta, Rowe, James B., Sanchez-Valle, Raquel, Seelaar, Harro, Synofzik, Matthis, Rohrer, Jonathan D., Borroni, Barbara, Afonso, Sónia, Almeida, Maria Rosario, Anderl-Straub, Sarah, Andersson, Christin, Antonell, Anna, Archetti, Silvana, Arighi, Andrea, Balasa, Mircea, Barandiaran, Myriam, Bargalló, Nuria, Bartha, Robart, Bender, Benjamin, Bertoux, Maxime, Bertrand, Anne, Bessi, Valentina, Black, Sandra, Borrego-Ecija, Sergi, Bouzigues, Arabella, Bras, Jose, Brice, Alexis, Bruffaerts, Rose, Butler, Chris R., Camuzat, Agnès, Cañada, Marta, Cantoni, Valentina, Meeter, Lieke, van Minkelen, Rick, Panman, Jessica, Papma, Janne M., van Swieten, John C., Benussi, Alberto, Alberici, Antonella, Samra, Kiran, Russell, Lucy L., Greaves, Caroline V., Bocchetta, Martina, Ducharme, Simon, Finger, Elizabeth, Fumagalli, Giorgio, Galimberti, Daniela, Jiskoot, Lize C., Le Ber, Isabelle, Masellis, Mario, Nacmias, Benedetta, Rowe, James B., Sanchez-Valle, Raquel, Seelaar, Harro, Synofzik, Matthis, Rohrer, Jonathan D., Borroni, Barbara, Afonso, Sónia, Almeida, Maria Rosario, Anderl-Straub, Sarah, Andersson, Christin, Antonell, Anna, Archetti, Silvana, Arighi, Andrea, Balasa, Mircea, Barandiaran, Myriam, Bargalló, Nuria, Bartha, Robart, Bender, Benjamin, Bertoux, Maxime, Bertrand, Anne, Bessi, Valentina, Black, Sandra, Borrego-Ecija, Sergi, Bouzigues, Arabella, Bras, Jose, Brice, Alexis, Bruffaerts, Rose, Butler, Chris R., Camuzat, Agnès, Cañada, Marta, Cantoni, Valentina, Meeter, Lieke, van Minkelen, Rick, Panman, Jessica, Papma, Janne M., and van Swieten, John C.
Abstract: The presymptomatic stages of frontotemporal dementia (FTD) are still poorly defined and encompass a long accrual of progressive biological (preclinical) and then clinical (prodromal) changes, antedating the onset of dementia. The heterogeneity of clinical presentations and the different neuropathological phenotypes have prevented a prior clear description of either preclinical or prodromal FTD. Recent advances in therapeutic approaches, at least in monogenic disease, demand a proper definition of these predementia stages. It has become clear that a consensus lexicon is needed to comprehensively describe the stages that anticipate dementia. The goal of the present work is to review existing literature on the preclinical and prodromal phases of FTD, providing recommendations to address the unmet questions, therefore laying out a strategy for operationalizing and better characterizing these presymptomatic disease stages.
Published: 2022

36. Longitudinal Cognitive Changes in Genetic Frontotemporal Dementia Within the GENFI Cohort

Author: Poos, Jackie M., Macdougall, Amy, Van Den Berg, Esther, Jiskoot, Lize C., Papma, Janne M., Van Der Ende, Emma L., Seelaar, Harro, Russell, Lucy L., Peakman, Georgia, Convery, Rhian, Pijnenburg, Yolande A.L., Moreno, Fermin, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Dore, Marie Claire, Masellis, Mario, Tartaglia, Maria Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Vandenberghe, Rik, Mendonca, Alexandre, Tiraboschi, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Christopher, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Le Ber, Isabelle, Pasquier, Florence, Van Swieten, John, Rohrer, Jonathan D., Poos, Jackie M., Macdougall, Amy, Van Den Berg, Esther, Jiskoot, Lize C., Papma, Janne M., Van Der Ende, Emma L., Seelaar, Harro, Russell, Lucy L., Peakman, Georgia, Convery, Rhian, Pijnenburg, Yolande A.L., Moreno, Fermin, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Dore, Marie Claire, Masellis, Mario, Tartaglia, Maria Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Vandenberghe, Rik, Mendonca, Alexandre, Tiraboschi, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Christopher, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Le Ber, Isabelle, Pasquier, Florence, Van Swieten, John, and Rohrer, Jonathan D.
Abstract: Background and Objectives Disease-modifying therapeutic trials for genetic frontotemporal dementia (FTD) are underway, but sensitive cognitive outcome measures are lacking. The aim of this study was to identify such cognitive tests in early stage FTD by investigating cognitive decline in a large cohort of genetic FTD pathogenic variant carriers and by investigating whether gene-specific differences are moderated by disease stage (asymptomatic, prodromal, and symptomatic). Methods C9orf72, GRN, and MAPT pathogenic variant carriers as well as controls underwent a yearly neuropsychological assessment covering 8 cognitive domains as part of the Genetic FTD Initiative, a prospective multicenter cohort study. Pathogenic variant carriers were stratified according to disease stage using the global Clinical Dementia Rating (CDR) plus National Alzheimer's Coordinating Center (NACC) FTLD score (0, 0.5, or >= 1). Linear mixed-effects models were used to investigate differences between genetic groups and disease stages as well as the 3-way interaction between time, genetic group, and disease stage. Results A total of 207 C9orf72, 206 GRN, and 86 MAPT pathogenic variant carriers and 255 controls were included. C9orf72 pathogenic variant carriers performed lower on attention, executive function, and verbal fluency from CDR plus NACC FTLD 0 onwards, with relatively minimal decline over time regardless of the CDR plus NACC FTLD score (i.e., disease progression). The cognitive profile in MAPT pathogenic variant carriers was characterized by lower memory performance at CDR plus NACC FTLD 0.5, with decline over time in language from the CDR plus NACC FTLD 0.5 stage onwards, and executive dysfunction rapidly developing at CDR plus NACC FTLD >= 1. GRN pathogenic variant carriers declined on verbal fluency and visuoconstruction in the CDR plus NACC FTLD 0.5 stage, with progressive decline in other cognitive domains starting at CDR plus NACC FTLD >= 1. D
Published: 2022

37. Development of a sensitive trial-ready poly(GP) CSF biomarker assay for C9orf72-associated frontotemporal dementia and amyotrophic lateral sclerosis

Author: Wilson, Katherine M., Katona, Eszter, Glaria, Idoia, Carcolé, Mireia, Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Bouzigues, Arabella, Heslegrave, Amanda J., Keshavan, Ashvini, Knowles, Kathryn, Patil, Saurabh, Mohapatra, Susovan, Liu, Yuanjing, Goyal, Jaya, Sanchez-Valle, Raquel, Laforce, Robert Jr, Synofzik, Matthis, Rowe, James B., Finger, Elizabeth, Vandenberghe, Rik, Butler, Christopher R., Gerhard, Alexander, Van Swieten, John C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, De Mendonça, Alexandre, Masellis, Mario, Tartaglia, M. Carmela, Otto, Markus, Graff, Caroline, Ducharme, Simon, Schott, Jonathan M., Malaspina, Andrea, Zetterberg, Henrik, Boyanapalli, Ramakrishna, Rohrer, Jonathan D., Isaacs, Adrian M., Wilson, Katherine M., Katona, Eszter, Glaria, Idoia, Carcolé, Mireia, Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Bouzigues, Arabella, Heslegrave, Amanda J., Keshavan, Ashvini, Knowles, Kathryn, Patil, Saurabh, Mohapatra, Susovan, Liu, Yuanjing, Goyal, Jaya, Sanchez-Valle, Raquel, Laforce, Robert Jr, Synofzik, Matthis, Rowe, James B., Finger, Elizabeth, Vandenberghe, Rik, Butler, Christopher R., Gerhard, Alexander, Van Swieten, John C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, De Mendonça, Alexandre, Masellis, Mario, Tartaglia, M. Carmela, Otto, Markus, Graff, Caroline, Ducharme, Simon, Schott, Jonathan M., Malaspina, Andrea, Zetterberg, Henrik, Boyanapalli, Ramakrishna, Rohrer, Jonathan D., and Isaacs, Adrian M.
Abstract: Objective A GGGGCC repeat expansion in the C9orf72 gene is the most common cause of genetic frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS). As potential therapies targeting the repeat expansion are now entering clinical trials, sensitive biomarker assays of target engagement are urgently required. Our objective was to develop such an assay. Methods We used the single molecule array (Simoa) platform to develop an immunoassay for measuring poly(GP) dipeptide repeat proteins (DPRs) generated by the C9orf72 repeat expansion in cerebrospinal fluid (CSF) of people with C9orf72-associated FTD/ALS. Results and conclusions We show the assay to be highly sensitive and robust, passing extensive qualification criteria including low intraplate and interplate variability, a high precision and accuracy in measuring both calibrators and samples, dilutional parallelism, tolerance to sample and standard freeze-thaw and no haemoglobin interference. We used this assay to measure poly(GP) in CSF samples collected through the Genetic FTD Initiative (N=40 C9orf72 and 15 controls). We found it had 100% specificity and 100% sensitivity and a large window for detecting target engagement, as the C9orf72 CSF sample with the lowest poly(GP) signal had eightfold higher signal than controls and on average values from C9orf72 samples were 38-fold higher than controls, which all fell below the lower limit of quantification of the assay. These data indicate that a Simoa-based poly(GP) DPR assay is suitable for use in clinical trials to determine target engagement of therapeutics aimed at reducing C9orf72 repeat-containing transcripts.
Published: 2022

38. Anomia is present pre-symptomatically in frontotemporal dementia due to MAPT mutations

Author: Bouzigues, Arabella, Russell, Lucy L., Peakman, Georgia, Bocchetta, Martina, Greaves, Caroline V., Convery, Rhian S., Todd, Emily, Rowe, James B., Borroni, Barbara, Galimberti, Daniela, Tiraboschi, Pietro, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Sorbi, Sandro, Butler, Chris R., Graff, Caroline, Gerhard, Alexander, Langheinrich, Tobias, Laforce, Robert, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Le Ber, Isabelle, Levin, Johannes, Danek, Adrian, Otto, Markus, Pasquier, Florence, Santana, Isabel, Rohrer, Jonathan D., Bouzigues, Arabella, Russell, Lucy L., Peakman, Georgia, Bocchetta, Martina, Greaves, Caroline V., Convery, Rhian S., Todd, Emily, Rowe, James B., Borroni, Barbara, Galimberti, Daniela, Tiraboschi, Pietro, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Sorbi, Sandro, Butler, Chris R., Graff, Caroline, Gerhard, Alexander, Langheinrich, Tobias, Laforce, Robert, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Le Ber, Isabelle, Levin, Johannes, Danek, Adrian, Otto, Markus, Pasquier, Florence, Santana, Isabel, and Rohrer, Jonathan D.
Abstract: INTRODUCTION: A third of frontotemporal dementia (FTD) is caused by an autosomal-dominant genetic mutation in one of three genes: microtubule-associated protein tau (MAPT), chromosome 9 open reading frame 72 (C9orf72) and progranulin (GRN). Prior studies of prodromal FTD have identified impaired executive function and social cognition early in the disease but few have studied naming in detail. METHODS: We investigated performance on the Boston Naming Test (BNT) in the GENetic Frontotemporal dementia Initiative cohort of 499 mutation carriers and 248 mutation-negative controls divided across three genetic groups: C9orf72, MAPT and GRN. Mutation carriers were further divided into 3 groups according to their global CDR plus NACC FTLD score: 0 (asymptomatic), 0.5 (prodromal) and 1 + (fully symptomatic). Groups were compared using a bootstrapped linear regression model, adjusting for age, sex, language and education. Finally, we identified neural correlates of anomia within carriers of each genetic group using a voxel-based morphometry analysis. RESULTS: All symptomatic groups performed worse on the BNT than controls with the MAPT symptomatic group scoring the worst. Furthermore, MAPT asymptomatic and prodromal groups performed significantly worse than controls. Correlates of anomia in MAPT mutation carriers included bilateral anterior temporal lobe regions and the anterior insula. Similar bilateral anterior temporal lobe involvement was seen in C9orf72 mutation carriers as well as more widespread left frontal atrophy. In GRN mutation carriers, neural correlates were limited to the left hemisphere, and involved frontal, temporal, insula and striatal regions. CONCLUSION: This study suggests the development of early anomia in MAPT mutation carriers, likely to be associated with impaired semantic knowledge. Clinical trials focused on the prodromal period within individuals with MAPT mutations should use language tasks, such as the BNT for patient stratification and as ou
Published: 2022

39. Frequency and Longitudinal Course of Motor Signs in Genetic Frontotemporal Dementia

Author: Schoenecker, Sonja, Martinez-Murcia, Francisco J., Rauchmann, Boris-Stephan, Franzmeier, Nicolai, Prix, Catharina, Wlasich, Elisabeth, Loosli, Sandra V., Bochmann, Katja, Gorriz Saez, Juan-Manuel, Laforce, Robert, Ducharme, Simon, Tartaglia, Maria Carmela, Finger, Elizabeth, de Mendonca, Alexandre, Santana, Isabel, Sanchez-Valle, Raquel, Moreno, Fermin, Sorbi, Sandro, Tagliavini, Fabrizio, Borroni, Barbara, Otto, Markus, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, van Swieten, John, Butler, Christopher, Gerhard, Alexander, Graff, Caroline, Danek, Adrian, Rohrer, Jonathan D., Masellis, Mario, Rowe, James, Levin, Johannes, Schoenecker, Sonja, Martinez-Murcia, Francisco J., Rauchmann, Boris-Stephan, Franzmeier, Nicolai, Prix, Catharina, Wlasich, Elisabeth, Loosli, Sandra V., Bochmann, Katja, Gorriz Saez, Juan-Manuel, Laforce, Robert, Ducharme, Simon, Tartaglia, Maria Carmela, Finger, Elizabeth, de Mendonca, Alexandre, Santana, Isabel, Sanchez-Valle, Raquel, Moreno, Fermin, Sorbi, Sandro, Tagliavini, Fabrizio, Borroni, Barbara, Otto, Markus, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, van Swieten, John, Butler, Christopher, Gerhard, Alexander, Graff, Caroline, Danek, Adrian, Rohrer, Jonathan D., Masellis, Mario, Rowe, James, and Levin, Johannes
Abstract: Background and Objectives Frontotemporal dementia (FTD) is a highly heritable disorder. The majority of genetic cases are caused by autosomal dominant pathogenic variants in the chromosome 9 open reading frame 72 (c9orf72), progranulin (GRN), and microtubule-associated protein tau (MAPT) gene. As motor disorders are increasingly recognized as part of the clinical spectrum, the current study aimed to describe motor phenotypes caused by genetic FTD, quantify their temporal association, and investigate their regional association with brain atrophy. Methods We analyzed baseline visit data of known carriers of a pathogenic variant in the c9orf72, GRN, or MAPT gene from the Genetic Frontotemporal Dementia Initiative cohort study. Principal component analysis with varimax rotation was performed to identify motor sign clusters that were compared with respect to frequency and severity between groups. Associations with cross-sectional atrophy patterns were determined using voxel-wise regression. We applied linear mixed effects models to assess whether groups differed in the association between motor signs and estimated time to symptom onset. Results A total of 322 pathogenic variant carriers were included in the analysis: 122 c9orf72 (79 presymptomatic), 143 GRN (112 presymptomatic), and 57 MAPT (43 presymptomatic) pathogenic variant carriers. Principal component analysis revealed 5 motor clusters, which we call progressive supranuclear palsy (PSP)-like, bulbar amyotrophic lateral sclerosis (ALS)-like, mixed/ALS-like, Parkinson disease (PD) like, and corticobasal syndrome-like motor phenotypes. There was no significant group difference in the frequency of signs of different motor phenotypes. However, mixed/ALS-like motor signs were most frequent, followed by PD-like motor signs. Although the PSP-like phenotype was associated with mesencephalic atrophy, the mixed/ALS-like phenotype was assoc
Published: 2022

40. Differential impairment of cerebrospinal fluid synaptic biomarkers in the genetic forms of frontotemporal dementia

Author: Sogorb-Esteve, Aitana, Nilsson, Johanna, Swift, Imogen J., Heller, Carolin, Bocchetta, Martina, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., van Swieten, John C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, Gobom, Johan, Brinkmalm, Ann, Blennow, Kaj, Zetterberg, Henrik, Rohrer, Jonathan D., Sogorb-Esteve, Aitana, Nilsson, Johanna, Swift, Imogen J., Heller, Carolin, Bocchetta, Martina, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., van Swieten, John C., Seelaar, Harro, Borroni, Barbara, Galimberti, Daniela, Sanchez-Valle, Raquel, Laforce, Robert, Moreno, Fermin, Synofzik, Matthis, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Vandenberghe, Rik, Finger, Elizabeth, Tagliavini, Fabrizio, Santana, Isabel, Butler, Chris R., Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Otto, Markus, Sorbi, Sandro, Le Ber, Isabelle, Pasquier, Florence, Gobom, Johan, Brinkmalm, Ann, Blennow, Kaj, Zetterberg, Henrik, and Rohrer, Jonathan D.
Abstract: Background: Approximately a third of frontotemporal dementia (FTD) is genetic with mutations in three genes accounting for most of the inheritance: C9orf72, GRN, and MAPT. Impaired synaptic health is a common mechanism in all three genetic variants, so developing fluid biomarkers of this process could be useful as a readout of cellular dysfunction within therapeutic trials. Methods: A total of 193 cerebrospinal fluid (CSF) samples from the GENetic FTD Initiative including 77 presymptomatic (31 C9orf72, 23 GRN, 23 MAPT) and 55 symptomatic (26 C9orf72, 17 GRN, 12 MAPT) mutation carriers as well as 61 mutation-negative controls were measured using a microflow LC PRM-MS set-up targeting 15 synaptic proteins: AP-2 complex subunit beta, complexin-2, beta-synuclein, gamma-synuclein, 14–3-3 proteins (eta, epsilon, zeta/delta), neurogranin, Rab GDP dissociation inhibitor alpha (Rab GDI alpha), syntaxin-1B, syntaxin-7, phosphatidylethanolamine-binding protein 1 (PEBP-1), neuronal pentraxin receptor (NPTXR), neuronal pentraxin 1 (NPTX1), and neuronal pentraxin 2 (NPTX2). Mutation carrier groups were compared to each other and to controls using a bootstrapped linear regression model, adjusting for age and sex. Results: CSF levels of eight proteins were increased only in symptomatic MAPT mutation carriers (compared with controls) and not in symptomatic C9orf72 or GRN mutation carriers: beta-synuclein, gamma-synuclein, 14–3-3-eta, neurogranin, Rab GDI alpha, syntaxin-1B, syntaxin-7, and PEBP-1, with three other proteins increased in MAPT mutation carriers compared with the other genetic groups (AP-2 complex subunit beta, complexin-2, and 14–3-3 zeta/delta). In contrast, CSF NPTX1 and NPTX2 levels were affected in all three genetic groups (decreased compared with controls), with NPTXR concentrations being affected in C9orf72 and GRN mutation carriers only (decreased compared with controls). No changes were seen in the CSF levels of these proteins in presymptomatic mutation carr
Published: 2022

41. Elevated CSF and plasma complement proteins in genetic frontotemporal dementia:results from the GENFI study

Author: van der Ende, Emma L., Heller, Carolin, Sogorb-Esteve, Aitana, Swift, Imogen J., McFall, David, Peakman, Georgia, Bouzigues, Arabella, Poos, Jackie M., Jiskoot, Lize C., Panman, Jessica L., Papma, Janne M., Meeter, Lieke H., Dopper, Elise G.P., Bocchetta, Martina, Todd, Emily, Cash, David, Graff, Caroline, Synofzik, Matthis, Moreno, Fermin, Finger, Elizabeth, Sanchez-Valle, Raquel, Vandenberghe, Rik, Laforce, Robert, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Butler, Chris, Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Pijnenburg, Yolande A.L., Otto, Markus, Borroni, Barbara, Tagliavini, Fabrizio, de Mendonça, Alexandre, Santana, Isabel, Galimberti, Daniela, Sorbi, Sandro, Zetterberg, Henrik, Huang, Eric, van Swieten, John C., Rohrer, Jonathan D., Seelaar, Harro, van der Ende, Emma L., Heller, Carolin, Sogorb-Esteve, Aitana, Swift, Imogen J., McFall, David, Peakman, Georgia, Bouzigues, Arabella, Poos, Jackie M., Jiskoot, Lize C., Panman, Jessica L., Papma, Janne M., Meeter, Lieke H., Dopper, Elise G.P., Bocchetta, Martina, Todd, Emily, Cash, David, Graff, Caroline, Synofzik, Matthis, Moreno, Fermin, Finger, Elizabeth, Sanchez-Valle, Raquel, Vandenberghe, Rik, Laforce, Robert, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Butler, Chris, Ducharme, Simon, Gerhard, Alexander, Danek, Adrian, Levin, Johannes, Pijnenburg, Yolande A.L., Otto, Markus, Borroni, Barbara, Tagliavini, Fabrizio, de Mendonça, Alexandre, Santana, Isabel, Galimberti, Daniela, Sorbi, Sandro, Zetterberg, Henrik, Huang, Eric, van Swieten, John C., Rohrer, Jonathan D., and Seelaar, Harro
Abstract: BACKGROUND: Neuroinflammation is emerging as an important pathological process in frontotemporal dementia (FTD), but biomarkers are lacking. We aimed to determine the value of complement proteins, which are key components of innate immunity, as biomarkers in cerebrospinal fluid (CSF) and plasma of presymptomatic and symptomatic genetic FTD mutation carriers. METHODS: We measured the complement proteins C1q and C3b in CSF by ELISAs in 224 presymptomatic and symptomatic GRN, C9orf72 or MAPT mutation carriers and non-carriers participating in the Genetic Frontotemporal Dementia Initiative (GENFI), a multicentre cohort study. Next, we used multiplex immunoassays to measure a panel of 14 complement proteins in plasma of 431 GENFI participants. We correlated complement protein levels with corresponding clinical and neuroimaging data, neurofilament light chain (NfL) and glial fibrillary acidic protein (GFAP). RESULTS: CSF C1q and C3b, as well as plasma C2 and C3, were elevated in symptomatic mutation carriers compared to presymptomatic carriers and non-carriers. In genetic subgroup analyses, these differences remained statistically significant for C9orf72 mutation carriers. In presymptomatic carriers, several complement proteins correlated negatively with grey matter volume of FTD-related regions and positively with NfL and GFAP. In symptomatic carriers, correlations were additionally observed with disease duration and with Mini Mental State Examination and Clinical Dementia Rating scale® plus NACC Frontotemporal lobar degeneration sum of boxes scores. CONCLUSIONS: Elevated levels of CSF C1q and C3b, as well as plasma C2 and C3, demonstrate the presence of complement activation in the symptomatic stage of genetic FTD. Intriguingly, correlations with several disease measures in presymptomatic carriers suggest that complement protein levels might increase before symptom onset. Although the overlap between groups precludes their use as diagnosti
Published: 2022

42. CSF glial markers are elevated in a subset of patients with genetic frontotemporal dementia

Author: Woollacott, Ione O.C., Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Knowles, Kathryn, Bouzigues, Arabella, Russell, Lucy L., Peakman, Georgia, Greaves, Caroline V., Convery, Rhian, Heslegrave, Amanda, Rowe, James B., Borroni, Barbara, Galimberti, Daniela, Tiraboschi, Pietro, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Sorbi, Sandro, Butler, Chris R., Graff, Caroline, Gerhard, Alexander, Laforce, Robert, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Ber, Isabelle Le, Levin, Johannes, Otto, Markus, Pasquier, Florence, Santana, Isabel, Zetterberg, Henrik, Rohrer, Jonathan D., Woollacott, Ione O.C., Swift, Imogen J., Sogorb-Esteve, Aitana, Heller, Carolin, Knowles, Kathryn, Bouzigues, Arabella, Russell, Lucy L., Peakman, Georgia, Greaves, Caroline V., Convery, Rhian, Heslegrave, Amanda, Rowe, James B., Borroni, Barbara, Galimberti, Daniela, Tiraboschi, Pietro, Masellis, Mario, Tartaglia, Maria Carmela, Finger, Elizabeth, van Swieten, John C., Seelaar, Harro, Jiskoot, Lize, Sorbi, Sandro, Butler, Chris R., Graff, Caroline, Gerhard, Alexander, Laforce, Robert, Sanchez-Valle, Raquel, de Mendonça, Alexandre, Moreno, Fermin, Synofzik, Matthis, Vandenberghe, Rik, Ducharme, Simon, Ber, Isabelle Le, Levin, Johannes, Otto, Markus, Pasquier, Florence, Santana, Isabel, Zetterberg, Henrik, and Rohrer, Jonathan D.
Abstract: Background: Neuroinflammation has been shown to be an important pathophysiological disease mechanism in frontotemporal dementia (FTD). This includes activation of microglia, a process that can be measured in life through assaying different glia-derived biomarkers in cerebrospinal fluid. However, only a few studies so far have taken place in FTD, and even fewer focusing on the genetic forms of FTD. Methods: We investigated the cerebrospinal fluid concentrations of TREM2, YKL-40 and chitotriosidase using immunoassays in 183 participants from the Genetic FTD Initiative (GENFI) study: 49 C9orf72 (36 presymptomatic, 13 symptomatic), 49 GRN (37 presymptomatic, 12 symptomatic) and 23 MAPT (16 presymptomatic, 7 symptomatic) mutation carriers and 62 mutation-negative controls. Concentrations were compared between groups using a linear regression model adjusting for age and sex, with 95% bias-corrected bootstrapped confidence intervals. Concentrations in each group were correlated with the Mini-Mental State Examination (MMSE) score using non-parametric partial correlations adjusting for age. Age-adjusted z-scores were also created for the concentration of markers in each participant, investigating how many had a value above the 95th percentile of controls. Results: Only chitotriosidase in symptomatic GRN mutation carriers had a concentration significantly higher than controls. No group had higher TREM2 or YKL-40 concentrations than controls after adjusting for age and sex. There was a significant negative correlation of chitotriosidase concentration with MMSE in presymptomatic GRN mutation carriers. In the symptomatic groups, for TREM2 31% of C9orf72, 25% of GRN, and 14% of MAPT mutation carriers had a concentration above the 95th percentile of controls. For YKL-40 this was 8% C9orf72, 8% GRN and 0% MAPT mutation carriers, whilst for chitotriosidase it was 23% C9orf72, 50% GRN, and 29% MAPT mutation carriers. Conclusions: Although chitotriosidase concentrations
Published: 2022

43. Comparison of clinical rating scales in genetic frontotemporal dementia within the GENFI cohort

Author: Peakman, Georgia, Russell, Lucy L., Convery, Rhian S., Nicholas, Jennifer M., Van Swieten, John C., Jiskoot, Lize C., Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, De Mendonca, Alexandre, Butler, Chris R., Gerhard, Alex, Ducharme, Simon, Le Ber, Isabelle, Tagliavini, Fabrizio, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Rohrer, Jonathan D., Peakman, Georgia, Russell, Lucy L., Convery, Rhian S., Nicholas, Jennifer M., Van Swieten, John C., Jiskoot, Lize C., Moreno, Fermin, Sanchez-Valle, Raquel, Laforce, Robert, Graff, Caroline, Masellis, Mario, Tartaglia, Maria Carmela, Rowe, James B., Borroni, Barbara, Finger, Elizabeth, Synofzik, Matthis, Galimberti, Daniela, Vandenberghe, Rik, De Mendonca, Alexandre, Butler, Chris R., Gerhard, Alex, Ducharme, Simon, Le Ber, Isabelle, Tagliavini, Fabrizio, Santana, Isabel, Pasquier, Florence, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, and Rohrer, Jonathan D.
Abstract: Background Therapeutic trials are now underway in genetic forms of frontotemporal dementia (FTD) but clinical outcome measures are limited. The two most commonly used measures, the Clinical Dementia Rating (CDR)+National Alzheimer's Disease Coordinating Center (NACC) Frontotemporal Lobar Degeneration (FTLD) and the FTD Rating Scale (FRS), have yet to be compared in detail in the genetic forms of FTD. Methods The CDR+NACC FTLD and FRS were assessed cross-sectionally in 725 consecutively recruited participants from the Genetic FTD Initiative: 457 mutation carriers (77 microtubule-Associated protein tau (MAPT), 187 GRN, 193 C9orf72) and 268 family members without mutations (non-carrier control group). 231 mutation carriers (51 MAPT, 92 GRN, 88 C9orf72) and 145 non-carriers had available longitudinal data at a follow-up time point. Results Cross-sectionally, the mean FRS score was lower in all genetic groups compared with controls: GRN mutation carriers mean 83.4 (SD 27.0), MAPT mutation carriers 78.2 (28.8), C9orf72 mutation carriers 71.0 (34.0), controls 96.2 (7.7), p<0.001 for all comparisons, while the mean CDR+NACC FTLD Sum of Boxes was significantly higher in all genetic groups: GRN mutation carriers mean 2.6 (5.2), MAPT mutation carriers 3.2 (5.6), C9orf72 mutation carriers 4.2 (6.2), controls 0.2 (0.6), p<0.001 for all comparisons. Mean FRS score decreased and CDR+NACC FTLD Sum of Boxes increased with increasing disease severity within each individual genetic group. FRS and CDR+NACC FTLD Sum of Boxes scores were strongly negatively correlated across all mutation carriers (r s =-0.77, p<0.001) and within each genetic group (r s =-0.67 to-0.81, p<0.001 in each group). Nonetheless, discrepancies in disease staging were seen between the scales, and with each scale and clinician-judged symptomatic status. Longitudinally, annualised change in both FRS and CDR+NACC FTLD Sum of Boxes scores initially increased with disease severity level before decreasing
Published: 2022

44. Cognitive composites for genetic frontotemporal dementia:GENFI-Cog

Author: Moore, Katrina M., Poos, Jackie M., Nicholas, Jennifer, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., Jiskoot, Lize C., van der Ende, Emma, van den Berg, Esther, Papma, Janne M., Seelaar, Harro, Pijnenburg, Yolande A.L., Moreno, Fermin, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Masellis, Mario, Tartaglia, Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Vandenberghe, Rik, de Mendonça, Alexandre, Tiraboschi, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Chris, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Le Ber, Isabel, Pasquier, Florence, van Swieten, John C., Rohrer, Jonathan D., Moore, Katrina M., Poos, Jackie M., Nicholas, Jennifer, Russell, Lucy L., Peakman, Georgia, Convery, Rhian S., Jiskoot, Lize C., van der Ende, Emma, van den Berg, Esther, Papma, Janne M., Seelaar, Harro, Pijnenburg, Yolande A.L., Moreno, Fermin, Sanchez-Valle, Raquel, Borroni, Barbara, Laforce, Robert, Masellis, Mario, Tartaglia, Carmela, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Finger, Elizabeth, Synofzik, Matthis, Vandenberghe, Rik, de Mendonça, Alexandre, Tiraboschi, Pietro, Santana, Isabel, Ducharme, Simon, Butler, Chris, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Le Ber, Isabel, Pasquier, Florence, van Swieten, John C., and Rohrer, Jonathan D.
Abstract: Background: Clinical endpoints for upcoming therapeutic trials in frontotemporal dementia (FTD) are increasingly urgent. Cognitive composite scores are often used as endpoints but are lacking in genetic FTD. We aimed to create cognitive composite scores for genetic frontotemporal dementia (FTD) as well as recommendations for recruitment and duration in clinical trial design. Methods: A standardized neuropsychological test battery covering six cognitive domains was completed by 69 C9orf72, 41 GRN, and 28 MAPT mutation carriers with CDR® plus NACC-FTLD ≥ 0.5 and 275 controls. Logistic regression was used to identify the combination of tests that distinguished best between each mutation carrier group and controls. The composite scores were calculated from the weighted averages of test scores in the models based on the regression coefficients. Sample size estimates were calculated for individual cognitive tests and composites in a theoretical trial aimed at preventing progression from a prodromal stage (CDR® plus NACC-FTLD 0.5) to a fully symptomatic stage (CDR® plus NACC-FTLD ≥ 1). Time-to-event analysis was performed to determine how quickly mutation carriers progressed from CDR® plus NACC-FTLD = 0.5 to ≥ 1 (and therefore how long a trial would need to be). Results: The results from the logistic regression analyses resulted in different composite scores for each mutation carrier group (i.e. C9orf72, GRN, and MAPT). The estimated sample size to detect a treatment effect was lower for composite scores than for most individual tests. A Kaplan-Meier curve showed that after 3 years, ~ 50% of individuals had converted from CDR® plus NACC-FTLD 0.5 to ≥ 1, which means that the estimated effect size needs to be halved in sample size calculations as only half of the mutation carriers would be expected to progress from CDR® plus NACC FTLD 0.5 to ≥ 1 without treatment over that time period. Discussion: We created gene-specific cognitive composite scores for C9orf72, GRN, and M
Published: 2022

45. Stratifying the Presymptomatic Phase of Genetic Frontotemporal Dementia by Serum NfL and pNfH:A Longitudinal Multicentre Study

Author: Wilke, Carlo, Reich, Selina, van Swieten, John C., Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria C., Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Frisoni, Giovanni, Ghidoni, Roberta, Sorbi, Sandro, Bocchetta, Martina, Todd, Emily, Kuhle, Jens, Barro, Christian, Afonso, Sónia, Almeida, Maria Rosario, Anderl-Straub, Sarah, Andersson, Christin, Antonell, Anna, Archetti, Silvana, Arighi, Andrea, Balasa, Mircea, Barandiaran, Myriam, Bargalló, Nuria, Bartha, Robart, Bender, Benjamin, Benussi, Alberto, Benussi, Luisa, Rohrer, Jonathan D., Synofzik, Matthis, Wilke, Carlo, Reich, Selina, van Swieten, John C., Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Galimberti, Daniela, Rowe, James B., Masellis, Mario, Tartaglia, Maria C., Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R., Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Frisoni, Giovanni, Ghidoni, Roberta, Sorbi, Sandro, Bocchetta, Martina, Todd, Emily, Kuhle, Jens, Barro, Christian, Afonso, Sónia, Almeida, Maria Rosario, Anderl-Straub, Sarah, Andersson, Christin, Antonell, Anna, Archetti, Silvana, Arighi, Andrea, Balasa, Mircea, Barandiaran, Myriam, Bargalló, Nuria, Bartha, Robart, Bender, Benjamin, Benussi, Alberto, Benussi, Luisa, Rohrer, Jonathan D., and Synofzik, Matthis
Abstract: Objective: Although the presymptomatic stages of frontotemporal dementia (FTD) provide a unique chance to delay or even prevent neurodegeneration by early intervention, they remain poorly defined. Leveraging a large multicenter cohort of genetic FTD mutation carriers, we provide a biomarker-based stratification and biomarker cascade of the likely most treatment-relevant stage within the presymptomatic phase: the conversion stage. Methods: We longitudinally assessed serum levels of neurofilament light (NfL) and phosphorylated neurofilament heavy (pNfH) in the Genetic FTD Initiative (GENFI) cohort (n = 444), using single-molecule array technique. Subjects comprised 91 symptomatic and 179 presymptomatic subjects with mutations in the FTD genes C9orf72, GRN, or MAPT, and 174 mutation-negative within-family controls. Results: In a biomarker cascade, NfL increase preceded the hypothetical clinical onset by 15 years and concurred with brain atrophy onset, whereas pNfH increase started close to clinical onset. The conversion stage was marked by increased NfL, but still normal pNfH levels, while both were increased at the symptomatic stage. Intra-individual change rates were increased for NfL at the conversion stage and for pNfH at the symptomatic stage, highlighting their respective potential as stage-dependent dynamic biomarkers within the biomarker cascade. Increased NfL levels and NfL change rates allowed identification of presymptomatic subjects converting to symptomatic disease and capture of proximity-to-onset. We estimate stage-dependent sample sizes for trials aiming to decrease neurofilament levels or change rates. Interpretation: Blood NfL and pNfH provide dynamic stage-dependent stratification and, potentially, treatment response biomarkers in presymptomatic FTD, allowing demarcation of the conversion stage. The proposed biomarker cascade might pave the way towards a biomarker-based precision medicine approach to genetic FTD. ANN NEUROL 2022;91:33–47.
Published: 2022

46. Plasma Neurofilament Light for Prediction of Disease Progression in Familial Frontotemporal Lobar Degeneration.

Author: Rojas, Julio C, Rojas, Julio C, Wang, Ping, Staffaroni, Adam M, Heller, Carolin, Cobigo, Yann, Wolf, Amy, Goh, Sheng-Yang M, Ljubenkov, Peter A, Heuer, Hilary W, Fong, Jamie C, Taylor, Joanne B, Veras, Eliseo, Song, Linan, Jeromin, Andreas, Hanlon, David, Yu, Lili, Khinikar, Arvind, Sivasankaran, Rajeev, Kieloch, Agnieszka, Valentin, Marie-Anne, Karydas, Anna M, Mitic, Laura L, Pearlman, Rodney, Kornak, John, Kramer, Joel H, Miller, Bruce L, Kantarci, Kejal, Knopman, David S, Graff-Radford, Neill, Petrucelli, Leonard, Rademakers, Rosa, Irwin, David J, Grossman, Murray, Ramos, Eliana Marisa, Coppola, Giovanni, Mendez, Mario F, Bordelon, Yvette, Dickerson, Bradford C, Ghoshal, Nupur, Huey, Edward D, Mackenzie, Ian R, Appleby, Brian S, Domoto-Reilly, Kimiko, Hsiung, Ging-Yuek R, Toga, Arthur W, Weintraub, Sandra, Kaufer, Daniel I, Kerwin, Diana, Litvan, Irene, Onyike, Chiadikaobi U, Pantelyat, Alexander, Roberson, Erik D, Tartaglia, Maria C, Foroud, Tatiana, Chen, Weiping, Czerkowicz, Julie, Graham, Danielle L, van Swieten, John C, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Cash, David M, Convery, Rhian S, Bocchetta, Martina, Foiani, Martha, Greaves, Caroline V, Peakman, Georgia, Russell, Lucy, Swift, Imogen, Todd, Emily, Rohrer, Jonathan D, Boeve, Bradley F, Rosen, Howard J, Boxer, Adam L, ALLFTD and GENFI consortia, Rojas, Julio C, Rojas, Julio C, Wang, Ping, Staffaroni, Adam M, Heller, Carolin, Cobigo, Yann, Wolf, Amy, Goh, Sheng-Yang M, Ljubenkov, Peter A, Heuer, Hilary W, Fong, Jamie C, Taylor, Joanne B, Veras, Eliseo, Song, Linan, Jeromin, Andreas, Hanlon, David, Yu, Lili, Khinikar, Arvind, Sivasankaran, Rajeev, Kieloch, Agnieszka, Valentin, Marie-Anne, Karydas, Anna M, Mitic, Laura L, Pearlman, Rodney, Kornak, John, Kramer, Joel H, Miller, Bruce L, Kantarci, Kejal, Knopman, David S, Graff-Radford, Neill, Petrucelli, Leonard, Rademakers, Rosa, Irwin, David J, Grossman, Murray, Ramos, Eliana Marisa, Coppola, Giovanni, Mendez, Mario F, Bordelon, Yvette, Dickerson, Bradford C, Ghoshal, Nupur, Huey, Edward D, Mackenzie, Ian R, Appleby, Brian S, Domoto-Reilly, Kimiko, Hsiung, Ging-Yuek R, Toga, Arthur W, Weintraub, Sandra, Kaufer, Daniel I, Kerwin, Diana, Litvan, Irene, Onyike, Chiadikaobi U, Pantelyat, Alexander, Roberson, Erik D, Tartaglia, Maria C, Foroud, Tatiana, Chen, Weiping, Czerkowicz, Julie, Graham, Danielle L, van Swieten, John C, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Cash, David M, Convery, Rhian S, Bocchetta, Martina, Foiani, Martha, Greaves, Caroline V, Peakman, Georgia, Russell, Lucy, Swift, Imogen, Todd, Emily, Rohrer, Jonathan D, Boeve, Bradley F, Rosen, Howard J, Boxer, Adam L, and ALLFTD and GENFI consortia
Abstract: ObjectiveWe tested the hypothesis that plasma neurofilament light chain (NfL) identifies asymptomatic carriers of familial frontotemporal lobar degeneration (FTLD)-causing mutations at risk of disease progression.MethodsBaseline plasma NfL concentrations were measured with single-molecule array in original (n = 277) and validation (n = 297) cohorts. C9orf72, GRN, and MAPT mutation carriers and noncarriers from the same families were classified by disease severity (asymptomatic, prodromal, and full phenotype) using the CDR Dementia Staging Instrument plus behavior and language domains from the National Alzheimer's Disease Coordinating Center FTLD module (CDR+NACC-FTLD). Linear mixed-effect models related NfL to clinical variables.ResultsIn both cohorts, baseline NfL was higher in asymptomatic mutation carriers who showed phenoconversion or disease progression compared to nonprogressors (original: 11.4 ± 7 pg/mL vs 6.7 ± 5 pg/mL, p = 0.002; validation: 14.1 ± 12 pg/mL vs 8.7 ± 6 pg/mL, p = 0.035). Plasma NfL discriminated symptomatic from asymptomatic mutation carriers or those with prodromal disease (original cutoff: 13.6 pg/mL, 87.5% sensitivity, 82.7% specificity; validation cutoff: 19.8 pg/mL, 87.4% sensitivity, 84.3% specificity). Higher baseline NfL correlated with worse longitudinal CDR+NACC-FTLD sum of boxes scores, neuropsychological function, and atrophy, regardless of genotype or disease severity, including asymptomatic mutation carriers.ConclusionsPlasma NfL identifies asymptomatic carriers of FTLD-causing mutations at short-term risk of disease progression and is a potential tool to select participants for prevention clinical trials.Trial registration informationClinicalTrials.gov Identifier: NCT02372773 and NCT02365922.Classification of evidenceThis study provides Class I evidence that in carriers of FTLD-causing mutations, elevation of plasma NfL predicts short-term risk of clinical progression.
Published: 2021

47. Common variants in Alzheimer's disease and risk stratification by polygenic risk scores

Author: de Rojas, Itziar, Moreno-Grau, Sonia, Tesi, Niccolo, Grenier-Boley, Benjamin, Andrade, Victor, Jansen, Iris E., Pedersen, Nancy L., Stringa, Najada, Zettergren, Anna, Hernandez, Isabel, Montrreal, Laura, Antunez, Carmen, Antonell, Anna, Tankard, Rick M., Bis, Joshua C., Sims, Rebecca, Bellenguez, Celine, Quintela, Ines, Gonzalez-Perez, Antonio, Calero, Miguel, Franco-Macias, Emilio, Macias, Juan, Blesa, Rafael, Cervera-Carles, Laura, Menendez-Gonzalez, Manuel, Frank-Garcia, Ana, Luis Royo, Jose, Moreno, Fermin, Huerto Vilas, Raquel, Baquero, Miquel, Diez-Fairen, Monica, Lage, Carmen, Garcia-Madrona, Sebastian, Garcia-Gonzalez, Pablo, Alarcon-Martin, Emilio, Valero, Sergi, Sotolongo-Grau, Oscar, Ullgren, Abbe, Naj, Adam C., Lemstra, Afina W., Benaque, Alba, Perez-Cordon, Alba, Benussi, Alberto, Rabano, Alberto, Padovani, Alessandro, Squassina, Alessio, de Mendonca, Alexandre, Arias Pastor, Alfonso, Kok, Almar A. L., Meggy, Alun, Belen Pastor, Ana, Espinosa, Ana, Corma-Gomez, Anais, Martin Montes, Angel, Sanabria, Angela, DeStefano, Anita L., Schneider, Anja, Haapasalo, Annakaisa, Stahlbom, Anne Kinhult, Tybjaerg-Hansen, Anne, Hartmann, Annette M., Spottke, Annika, Corbaton-Anchuelo, Arturo, Rongve, Arvid, Borroni, Barbara, Arosio, Beatrice, Nacmias, Benedetta, Nordestgaard, Borge G., Kunkle, Brian W., Charbonnier, Camille, Abdelnour, Carla, Masullo, Carlo, Martinez Rodriguez, Carmen, Munoz-Fernandez, Carmen, Dufouil, Carole, Graff, Caroline, Ferreira, Catarina B., Chillotti, Caterina, Reynolds, Chandra A., Fenoglio, Chiara, Van Broeckhoven, Christine, Clark, Christopher, Pisanu, Claudia, Satizabal, Claudia L., Holmes, Clive, Buiza-Rueda, Dolores, Aarsland, Dag, Rujescu, Dan, Alcolea, Daniel, Galimberti, Daniela, Wallon, David, Seripa, Davide, Gruenblatt, Edna, Dardiotis, Efthimios, Duezel, Emrah, Scarpini, Elio, Conti, Elisa, Rubino, Elisa, Gelpi, Ellen, Rodriguez-Rodriguez, Eloy, Duron, Emmanuelle, Boerwinkle, Eric, Ferri, Evelyn, Tagliavini, Fabrizio, Kucukali, Fahri, Pasquier, Florence, Sanchez-Garcia, Florentino, Mangialasche, Francesca, Jessen, Frank, Nicolas, Gael, Selbaek, Geir, Ortega, Gemma, Chene, Genevieve, Hadjigeorgiou, Georgios, Rossi, Giacomina, Spalletta, Gianfranco, Giaccone, Giorgio, Grande, Giulia, Binetti, Giuliano, Papenberg, Goran, Hampel, Harald, Bailly, Henri, Zetterberg, Henrik, Soininen, Hilkka, Karlsson, Ida K., Alvarez, Ignacio, Appollonio, Ildebrando, Giegling, Ina, Skoog, Ingmar, Saltvedt, Ingvild, Rainero, Innocenzo, Allende, Irene Rosas, Hort, Jakub, Diehl-Schmid, Janine, Van Dongen, Jasper, Vidal, Jean-Sebastien, Lehtisalo, Jenni, Wiltfang, Jens, Thomassen, Jesper Qvist, Kornhuber, Johannes, Haines, Jonathan L., Vogelgsang, Jonathan, Pineda, Juan A., Fortea, Juan, Popp, Julius, Deckert, Juergen, Buerger, Katharina, Morgan, Kevin, Fliessbach, Klaus, Sleegers, Kristel, Molina-Porcel, Laura, Kilander, Lena, Weinhold, Leonie, Farrer, Lindsay A., Wang, Li-San, Kleineidam, Luca, Farotti, Lucia, Parnetti, Lucilla, Tremolizzo, Lucio, Hausner, Lucrezia, Benussi, Luisa, Froelich, Lutz, Ikram, M. Arfan, Deniz-Naranjo, M. Candida, Tsolaki, Magda, Rosende-Roca, Maitee, Lowenmark, Malin, Hulsman, Marc, Spallazzi, Marco, Pericak-Vance, Margaret A., Esiri, Margaret, Sanchez-Arjona, Maria Bernal, Carolina Dalmasso, Maria, Teresa Martinez-Larrad, Maria, Arcaro, Marina, Noethen, Markus M., Fernandez-Fuertes, Marta, Dichgans, Martin, Ingelsson, Martin, Herrmann, Martin J., Scherer, Martin, Vyhnalek, Martin, Kosmidis, Mary H., Yannakoulia, Mary, Schmid, Matthias, Ewers, Michael, Heneka, Michael T., Wagner, Michael, Scamosci, Michela, Kivipelto, Miia, Hiltunen, Mikko, Zulaica, Miren, Alegret, Montserrat, Fornage, Myriam, Roberto, Natalia, van Schoor, Natasja M., Seidu, Nazib M., Banaj, Nerisa, Armstrong, Nicola J., Scarmeas, Nikolaos, Scherbaum, Norbert, Goldhardt, Oliver, Hanon, Oliver, Peters, Oliver, Skrobot, Olivia Anna, Quenez, Olivier, Lerch, Ondrej, Bossu, Paola, Caffarra, Paolo, Rossi, Paolo Dionigi, Sakka, Paraskevi, Hoffmann, Per, Holmans, Peter A., Fischer, Peter, Riederer, Peter, Yang, Qiong, Marshall, Rachel, Kalaria, Rajesh N., Mayeux, Richard, Vandenberghe, Rik, Cecchetti, Roberta, Ghidoni, Roberta, Frikke-Schmidt, Ruth, Sorbi, Sandro, Hagg, Sara, Engelborghs, Sebastiaan, Helisalmi, Seppo, Sando, Sigrid Botne, Kern, Silke, Archetti, Silvana, Boschi, Silvia, Fostinelli, Silvia, Gil, Silvia, Mendoza, Silvia, Mead, Simon, Ciccone, Simona, Djurovic, Srdjan, Heilmann-Heimbach, Stefanie, Riedel-Heller, Steffi, Kuulasmaa, Teemu, del Ser, Teodoro, Lebouvier, Thibaud, Polak, Thomas, Ngandu, Tiia, Grimmer, Timo, Bessi, Valentina, Escott-Price, Valentina, Giedraitis, Vilmantas, Deramecourt, Vincent, Maier, Wolfgang, Jian, Xueqiu, Pijnenburg, Yolande A. L., Smith, A. David, Abdelnour, C., Adarmes-Gomez, A. D., Macleod, C., Kehoe, Patrick Gavin, Garcia-Ribas, Guillermo, Sanchez-Juan, Pascual, Pastor, Pau, Perez-Tur, Jordi, Pinol-Ripoll, Gerard, de Munain, Adolfo Lopez, Maria Garcia-Alberca, Jose, Bullido, Maria J., Alvarez, Victoria, Lleo, Alberto, Real, Luis M., Mir, Pablo, Medina, Miguel, Scheltens, Philip, Holstege, Henne, Marquie, Marta, Eugenia Saez, Maria, Carracedo, Angel, Amouyel, Philippe, Schellenberg, Gerard D., Williams, Julie, Seshadri, Sudha, van Duijn, Cornelia M., Mather, Karen A., Sanchez-Valle, Raquel, Serrano-Rios, Manuel, Orellana, Adelina, Tarraga, Lluis, Blennow, Kaj, Huisman, Martijn, Andreassen, Ole A., Posthuma, Danielle, Clarimon, Jordi, Boada, Merce, van der Flier, Wiesje M., Ramirez, Alfredo, Lambert, Jean-Charles, van der Lee, Sven J., Ruiz, Agustin, de Rojas, Itziar, Moreno-Grau, Sonia, Tesi, Niccolo, Grenier-Boley, Benjamin, Andrade, Victor, Jansen, Iris E., Pedersen, Nancy L., Stringa, Najada, Zettergren, Anna, Hernandez, Isabel, Montrreal, Laura, Antunez, Carmen, Antonell, Anna, Tankard, Rick M., Bis, Joshua C., Sims, Rebecca, Bellenguez, Celine, Quintela, Ines, Gonzalez-Perez, Antonio, Calero, Miguel, Franco-Macias, Emilio, Macias, Juan, Blesa, Rafael, Cervera-Carles, Laura, Menendez-Gonzalez, Manuel, Frank-Garcia, Ana, Luis Royo, Jose, Moreno, Fermin, Huerto Vilas, Raquel, Baquero, Miquel, Diez-Fairen, Monica, Lage, Carmen, Garcia-Madrona, Sebastian, Garcia-Gonzalez, Pablo, Alarcon-Martin, Emilio, Valero, Sergi, Sotolongo-Grau, Oscar, Ullgren, Abbe, Naj, Adam C., Lemstra, Afina W., Benaque, Alba, Perez-Cordon, Alba, Benussi, Alberto, Rabano, Alberto, Padovani, Alessandro, Squassina, Alessio, de Mendonca, Alexandre, Arias Pastor, Alfonso, Kok, Almar A. L., Meggy, Alun, Belen Pastor, Ana, Espinosa, Ana, Corma-Gomez, Anais, Martin Montes, Angel, Sanabria, Angela, DeStefano, Anita L., Schneider, Anja, Haapasalo, Annakaisa, Stahlbom, Anne Kinhult, Tybjaerg-Hansen, Anne, Hartmann, Annette M., Spottke, Annika, Corbaton-Anchuelo, Arturo, Rongve, Arvid, Borroni, Barbara, Arosio, Beatrice, Nacmias, Benedetta, Nordestgaard, Borge G., Kunkle, Brian W., Charbonnier, Camille, Abdelnour, Carla, Masullo, Carlo, Martinez Rodriguez, Carmen, Munoz-Fernandez, Carmen, Dufouil, Carole, Graff, Caroline, Ferreira, Catarina B., Chillotti, Caterina, Reynolds, Chandra A., Fenoglio, Chiara, Van Broeckhoven, Christine, Clark, Christopher, Pisanu, Claudia, Satizabal, Claudia L., Holmes, Clive, Buiza-Rueda, Dolores, Aarsland, Dag, Rujescu, Dan, Alcolea, Daniel, Galimberti, Daniela, Wallon, David, Seripa, Davide, Gruenblatt, Edna, Dardiotis, Efthimios, Duezel, Emrah, Scarpini, Elio, Conti, Elisa, Rubino, Elisa, Gelpi, Ellen, Rodriguez-Rodriguez, Eloy, Duron, Emmanuelle, Boerwinkle, Eric, Ferri, Evelyn, Tagliavini, Fabrizio, Kucukali, Fahri, Pasquier, Florence, Sanchez-Garcia, Florentino, Mangialasche, Francesca, Jessen, Frank, Nicolas, Gael, Selbaek, Geir, Ortega, Gemma, Chene, Genevieve, Hadjigeorgiou, Georgios, Rossi, Giacomina, Spalletta, Gianfranco, Giaccone, Giorgio, Grande, Giulia, Binetti, Giuliano, Papenberg, Goran, Hampel, Harald, Bailly, Henri, Zetterberg, Henrik, Soininen, Hilkka, Karlsson, Ida K., Alvarez, Ignacio, Appollonio, Ildebrando, Giegling, Ina, Skoog, Ingmar, Saltvedt, Ingvild, Rainero, Innocenzo, Allende, Irene Rosas, Hort, Jakub, Diehl-Schmid, Janine, Van Dongen, Jasper, Vidal, Jean-Sebastien, Lehtisalo, Jenni, Wiltfang, Jens, Thomassen, Jesper Qvist, Kornhuber, Johannes, Haines, Jonathan L., Vogelgsang, Jonathan, Pineda, Juan A., Fortea, Juan, Popp, Julius, Deckert, Juergen, Buerger, Katharina, Morgan, Kevin, Fliessbach, Klaus, Sleegers, Kristel, Molina-Porcel, Laura, Kilander, Lena, Weinhold, Leonie, Farrer, Lindsay A., Wang, Li-San, Kleineidam, Luca, Farotti, Lucia, Parnetti, Lucilla, Tremolizzo, Lucio, Hausner, Lucrezia, Benussi, Luisa, Froelich, Lutz, Ikram, M. Arfan, Deniz-Naranjo, M. Candida, Tsolaki, Magda, Rosende-Roca, Maitee, Lowenmark, Malin, Hulsman, Marc, Spallazzi, Marco, Pericak-Vance, Margaret A., Esiri, Margaret, Sanchez-Arjona, Maria Bernal, Carolina Dalmasso, Maria, Teresa Martinez-Larrad, Maria, Arcaro, Marina, Noethen, Markus M., Fernandez-Fuertes, Marta, Dichgans, Martin, Ingelsson, Martin, Herrmann, Martin J., Scherer, Martin, Vyhnalek, Martin, Kosmidis, Mary H., Yannakoulia, Mary, Schmid, Matthias, Ewers, Michael, Heneka, Michael T., Wagner, Michael, Scamosci, Michela, Kivipelto, Miia, Hiltunen, Mikko, Zulaica, Miren, Alegret, Montserrat, Fornage, Myriam, Roberto, Natalia, van Schoor, Natasja M., Seidu, Nazib M., Banaj, Nerisa, Armstrong, Nicola J., Scarmeas, Nikolaos, Scherbaum, Norbert, Goldhardt, Oliver, Hanon, Oliver, Peters, Oliver, Skrobot, Olivia Anna, Quenez, Olivier, Lerch, Ondrej, Bossu, Paola, Caffarra, Paolo, Rossi, Paolo Dionigi, Sakka, Paraskevi, Hoffmann, Per, Holmans, Peter A., Fischer, Peter, Riederer, Peter, Yang, Qiong, Marshall, Rachel, Kalaria, Rajesh N., Mayeux, Richard, Vandenberghe, Rik, Cecchetti, Roberta, Ghidoni, Roberta, Frikke-Schmidt, Ruth, Sorbi, Sandro, Hagg, Sara, Engelborghs, Sebastiaan, Helisalmi, Seppo, Sando, Sigrid Botne, Kern, Silke, Archetti, Silvana, Boschi, Silvia, Fostinelli, Silvia, Gil, Silvia, Mendoza, Silvia, Mead, Simon, Ciccone, Simona, Djurovic, Srdjan, Heilmann-Heimbach, Stefanie, Riedel-Heller, Steffi, Kuulasmaa, Teemu, del Ser, Teodoro, Lebouvier, Thibaud, Polak, Thomas, Ngandu, Tiia, Grimmer, Timo, Bessi, Valentina, Escott-Price, Valentina, Giedraitis, Vilmantas, Deramecourt, Vincent, Maier, Wolfgang, Jian, Xueqiu, Pijnenburg, Yolande A. L., Smith, A. David, Abdelnour, C., Adarmes-Gomez, A. D., Macleod, C., Kehoe, Patrick Gavin, Garcia-Ribas, Guillermo, Sanchez-Juan, Pascual, Pastor, Pau, Perez-Tur, Jordi, Pinol-Ripoll, Gerard, de Munain, Adolfo Lopez, Maria Garcia-Alberca, Jose, Bullido, Maria J., Alvarez, Victoria, Lleo, Alberto, Real, Luis M., Mir, Pablo, Medina, Miguel, Scheltens, Philip, Holstege, Henne, Marquie, Marta, Eugenia Saez, Maria, Carracedo, Angel, Amouyel, Philippe, Schellenberg, Gerard D., Williams, Julie, Seshadri, Sudha, van Duijn, Cornelia M., Mather, Karen A., Sanchez-Valle, Raquel, Serrano-Rios, Manuel, Orellana, Adelina, Tarraga, Lluis, Blennow, Kaj, Huisman, Martijn, Andreassen, Ole A., Posthuma, Danielle, Clarimon, Jordi, Boada, Merce, van der Flier, Wiesje M., Ramirez, Alfredo, Lambert, Jean-Charles, van der Lee, Sven J., and Ruiz, Agustin
Abstract: Genetic discoveries of Alzheimer's disease are the drivers of our understanding, and together with polygenetic risk stratification can contribute towards planning of feasible and efficient preventive and curative clinical trials. We first perform a large genetic association study by merging all available case-control datasets and by-proxy study results (discovery n=409,435 and validation size n=58,190). Here, we add six variants associated with Alzheimer's disease risk (near APP, CHRNE, PRKD3/NDUFAF7, PLCG2 and two exonic variants in the SHARPIN gene). Assessment of the polygenic risk score and stratifying by APOE reveal a 4 to 5.5 years difference in median age at onset of Alzheimer's disease patients in APOE 4 carriers. Because of this study, the underlying mechanisms of APP can be studied to refine the amyloid cascade and the polygenic risk score provides a tool to select individuals at high risk of Alzheimer's disease. Known genetic loci account for only a fraction of the genetic contribution to Alzheimer's disease. Here, the authors have performed a large genome-wide meta-analysis comprising 409,435 individuals to discover 6 new loci and demonstrate the efficacy of an Alzheimer's disease polygenic risk score.
Published: 2021

48. A panel of CSF proteins separates genetic frontotemporal dementia from presymptomatic mutation carriers : a GENFI study

Author: Bergström, Sofia, Oijerstedt, Linn, Remnestål, Julia, Olofsson, Jennie, Ullgren, Abbe, Seelaar, Harro, van Swieten, John C., Synofzik, Matthis, Sanchez-Valle, Raquel, Moreno, Fermin, Finger, Elizabeth, Masellis, Mario, Tartaglia, Carmela, Vandenberghe, Rik, Laforce, Robert, Galimberti, Daniela, Borroni, Barbara, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Rohrer, Jonathan D., Manberg, Anna, Graff, Caroline, Nilsson, Peter, Bergström, Sofia, Oijerstedt, Linn, Remnestål, Julia, Olofsson, Jennie, Ullgren, Abbe, Seelaar, Harro, van Swieten, John C., Synofzik, Matthis, Sanchez-Valle, Raquel, Moreno, Fermin, Finger, Elizabeth, Masellis, Mario, Tartaglia, Carmela, Vandenberghe, Rik, Laforce, Robert, Galimberti, Daniela, Borroni, Barbara, Butler, Chris R., Gerhard, Alexander, Ducharme, Simon, Rohrer, Jonathan D., Manberg, Anna, Graff, Caroline, and Nilsson, Peter
Abstract: Background A detailed understanding of the pathological processes involved in genetic frontotemporal dementia is critical in order to provide the patients with an optimal future treatment. Protein levels in CSF have the potential to reflect different pathophysiological processes in the brain. We aimed to identify and evaluate panels of CSF proteins with potential to separate symptomatic individuals from individuals without clinical symptoms (unaffected), as well as presymptomatic individuals from mutation non-carriers. Methods A multiplexed antibody-based suspension bead array was used to analyse levels of 111 proteins in CSF samples from 221 individuals from families with genetic frontotemporal dementia. The data was explored using LASSO and Random forest. Results When comparing affected individuals with unaffected individuals, 14 proteins were identified as potentially important for the separation. Among these, four were identified as most important, namely neurofilament medium polypeptide (NEFM), neuronal pentraxin 2 (NPTX2), neurosecretory protein VGF (VGF) and aquaporin 4 (AQP4). The combined profile of these four proteins successfully separated the two groups, with higher levels of NEFM and AQP4 and lower levels of NPTX2 in affected compared to unaffected individuals. VGF contributed to the models, but the levels were not significantly lower in affected individuals. Next, when comparing presymptomatic GRN and C9orf72 mutation carriers in proximity to symptom onset with mutation non-carriers, six proteins were identified with a potential to contribute to a separation, including progranulin (GRN). Conclusion In conclusion, we have identified several proteins with the combined potential to separate affected individuals from unaffected individuals, as well as proteins with potential to contribute to the separation between presymptomatic individuals and mutation non-carriers. Further studies are needed to continue the investigation of these proteins and their poten, QC 20211217
Published: 2021
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49. Plasma Neurofilament Light for Prediction of Disease Progression in Familial Frontotemporal Lobar Degeneration.

Author: Rojas, Julio C, Rojas, Julio C, Wang, Ping, Staffaroni, Adam M, Heller, Carolin, Cobigo, Yann, Wolf, Amy, Goh, Sheng-Yang M, Ljubenkov, Peter A, Heuer, Hilary W, Fong, Jamie C, Taylor, Joanne B, Veras, Eliseo, Song, Linan, Jeromin, Andreas, Hanlon, David, Yu, Lili, Khinikar, Arvind, Sivasankaran, Rajeev, Kieloch, Agnieszka, Valentin, Marie-Anne, Karydas, Anna M, Mitic, Laura L, Pearlman, Rodney, Kornak, John, Kramer, Joel H, Miller, Bruce L, Kantarci, Kejal, Knopman, David S, Graff-Radford, Neill, Petrucelli, Leonard, Rademakers, Rosa, Irwin, David J, Grossman, Murray, Ramos, Eliana Marisa, Coppola, Giovanni, Mendez, Mario F, Bordelon, Yvette, Dickerson, Bradford C, Ghoshal, Nupur, Huey, Edward D, Mackenzie, Ian R, Appleby, Brian S, Domoto-Reilly, Kimiko, Hsiung, Ging-Yuek R, Toga, Arthur W, Weintraub, Sandra, Kaufer, Daniel I, Kerwin, Diana, Litvan, Irene, Onyike, Chiadikaobi U, Pantelyat, Alexander, Roberson, Erik D, Tartaglia, Maria C, Foroud, Tatiana, Chen, Weiping, Czerkowicz, Julie, Graham, Danielle L, van Swieten, John C, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Cash, David M, Convery, Rhian S, Bocchetta, Martina, Foiani, Martha, Greaves, Caroline V, Peakman, Georgia, Russell, Lucy, Swift, Imogen, Todd, Emily, Rohrer, Jonathan D, Boeve, Bradley F, Rosen, Howard J, Boxer, Adam L, ALLFTD and GENFI consortia, Rojas, Julio C, Rojas, Julio C, Wang, Ping, Staffaroni, Adam M, Heller, Carolin, Cobigo, Yann, Wolf, Amy, Goh, Sheng-Yang M, Ljubenkov, Peter A, Heuer, Hilary W, Fong, Jamie C, Taylor, Joanne B, Veras, Eliseo, Song, Linan, Jeromin, Andreas, Hanlon, David, Yu, Lili, Khinikar, Arvind, Sivasankaran, Rajeev, Kieloch, Agnieszka, Valentin, Marie-Anne, Karydas, Anna M, Mitic, Laura L, Pearlman, Rodney, Kornak, John, Kramer, Joel H, Miller, Bruce L, Kantarci, Kejal, Knopman, David S, Graff-Radford, Neill, Petrucelli, Leonard, Rademakers, Rosa, Irwin, David J, Grossman, Murray, Ramos, Eliana Marisa, Coppola, Giovanni, Mendez, Mario F, Bordelon, Yvette, Dickerson, Bradford C, Ghoshal, Nupur, Huey, Edward D, Mackenzie, Ian R, Appleby, Brian S, Domoto-Reilly, Kimiko, Hsiung, Ging-Yuek R, Toga, Arthur W, Weintraub, Sandra, Kaufer, Daniel I, Kerwin, Diana, Litvan, Irene, Onyike, Chiadikaobi U, Pantelyat, Alexander, Roberson, Erik D, Tartaglia, Maria C, Foroud, Tatiana, Chen, Weiping, Czerkowicz, Julie, Graham, Danielle L, van Swieten, John C, Borroni, Barbara, Sanchez-Valle, Raquel, Moreno, Fermin, Laforce, Robert, Graff, Caroline, Synofzik, Matthis, Galimberti, Daniela, Rowe, James B, Masellis, Mario, Finger, Elizabeth, Vandenberghe, Rik, de Mendonça, Alexandre, Tagliavini, Fabrizio, Santana, Isabel, Ducharme, Simon, Butler, Chris R, Gerhard, Alexander, Levin, Johannes, Danek, Adrian, Otto, Markus, Sorbi, Sandro, Cash, David M, Convery, Rhian S, Bocchetta, Martina, Foiani, Martha, Greaves, Caroline V, Peakman, Georgia, Russell, Lucy, Swift, Imogen, Todd, Emily, Rohrer, Jonathan D, Boeve, Bradley F, Rosen, Howard J, Boxer, Adam L, and ALLFTD and GENFI consortia
Abstract: ObjectiveWe tested the hypothesis that plasma neurofilament light chain (NfL) identifies asymptomatic carriers of familial frontotemporal lobar degeneration (FTLD)-causing mutations at risk of disease progression.MethodsBaseline plasma NfL concentrations were measured with single-molecule array in original (n = 277) and validation (n = 297) cohorts. C9orf72, GRN, and MAPT mutation carriers and noncarriers from the same families were classified by disease severity (asymptomatic, prodromal, and full phenotype) using the CDR Dementia Staging Instrument plus behavior and language domains from the National Alzheimer's Disease Coordinating Center FTLD module (CDR+NACC-FTLD). Linear mixed-effect models related NfL to clinical variables.ResultsIn both cohorts, baseline NfL was higher in asymptomatic mutation carriers who showed phenoconversion or disease progression compared to nonprogressors (original: 11.4 ± 7 pg/mL vs 6.7 ± 5 pg/mL, p = 0.002; validation: 14.1 ± 12 pg/mL vs 8.7 ± 6 pg/mL, p = 0.035). Plasma NfL discriminated symptomatic from asymptomatic mutation carriers or those with prodromal disease (original cutoff: 13.6 pg/mL, 87.5% sensitivity, 82.7% specificity; validation cutoff: 19.8 pg/mL, 87.4% sensitivity, 84.3% specificity). Higher baseline NfL correlated with worse longitudinal CDR+NACC-FTLD sum of boxes scores, neuropsychological function, and atrophy, regardless of genotype or disease severity, including asymptomatic mutation carriers.ConclusionsPlasma NfL identifies asymptomatic carriers of FTLD-causing mutations at short-term risk of disease progression and is a potential tool to select participants for prevention clinical trials.Trial registration informationClinicalTrials.gov Identifier: NCT02372773 and NCT02365922.Classification of evidenceThis study provides Class I evidence that in carriers of FTLD-causing mutations, elevation of plasma NfL predicts short-term risk of clinical progression.
Published: 2021

50. Multi‐cohort profiling reveals elevated CSF levels of brain‐enriched proteins in Alzheimer’s disease

Author: Bergström, Sofia, Remnestål, Julia, Yousef, Jamil, Olofsson, Jennie, Markaki, Ioanna, Carvalho, Stephanie, Corvol, Jean‐Christophe, Kultima, Kim, Kilander, Lena, Löwenmark, Malin, Ingelsson, Martin, Blennow, Kaj, Zetterberg, Henrik, Nellgård, Bengt, Brosseron, Frederic, Heneka, Michael T., Bosch, Beatriz, Sanchez‐Valle, Raquel, Månberg, Anna, Svenningsson, Per, Nilsson, Peter, Bergström, Sofia, Remnestål, Julia, Yousef, Jamil, Olofsson, Jennie, Markaki, Ioanna, Carvalho, Stephanie, Corvol, Jean‐Christophe, Kultima, Kim, Kilander, Lena, Löwenmark, Malin, Ingelsson, Martin, Blennow, Kaj, Zetterberg, Henrik, Nellgård, Bengt, Brosseron, Frederic, Heneka, Michael T., Bosch, Beatriz, Sanchez‐Valle, Raquel, Månberg, Anna, Svenningsson, Per, and Nilsson, Peter
Abstract: Objective: Decreased amyloid beta (Ab) 42 together with increased tau and phospho-tau in cerebrospinal fluid (CSF) is indicative of Alzheimer’s disease (AD). However, the molecular pathophysiology underlying the slowly progressive cognitive decline observed in AD is not fully understood and it is not known what other CSF biomarkers may be altered in early disease stages. Methods: We utilized an antibody-based suspension bead array to analyze levels of 216 proteins in CSF from AD patients, patients with mild cognitive impairment (MCI), and controls from two independent cohorts collected within the AETIONOMY consortium. Two additional cohorts from Sweden were used for biological verification. Results: Six proteins, amphiphysin (AMPH), aquaporin 4 (AQP4), cAMP-regulated phosphoprotein 21 (ARPP21), growth-associated protein 43 (GAP43), neurofilament medium polypeptide (NEFM), and synuclein beta (SNCB) were found at increased levels in CSF from AD patients compared with controls. Next, we used CSF levels of Ab42 and tau for the stratification of the MCI patients and observed increased levels of AMPH, AQP4, ARPP21, GAP43, and SNCB in the MCI subgroups with abnormal tau levels compared with controls. Further characterization revealed strong to moderate correlations between these five proteins and tau concentrations. Interpretation: In conclusion, we report six extensively replicated candidate biomarkers with the potential to reflect disease development. Continued evaluation of these proteins will determine to what extent they can aid in the discrimination of MCI patients with and without an underlying AD etiology, and if they have the potential to contribute to a better understanding of the AD continuum., QC 20211116
Published: 2021
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