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1. De novo monoallelic Reelin missense variants cause dominant neuronal migration disorders via a dominant-negative mechanism

Author

Riva, Martina, Ferreira, Sofia, Hayashi, Kotaro, Saillour, Yoann, Medvedeva, Vera P., Honda, Takao, Hayashi, Kanehiro, Altersitz, Claire, Albadri, Shahad, Rosello, Marion, Dang, Julie, Serafini, Malo, Causeret, Frederic, Henry, Olivia J., Roux, Charles-Joris, Bellesme, Celine, Freri, Elena, Josifova, Dragana, Parrini, Elena, Guerrini, Renzo, Del Bene, Filippo, Nakajima, Kazunori, Bahi-Buisson, Nadia, and Pierani, Alessandra

Subjects
Nervous system diseases -- Diagnosis -- Care and treatment -- Genetic aspects, Cell migration -- Health aspects -- Genetic aspects, Genetic variation -- Health aspects
Abstract

Reelin (RELN) is a secreted glycoprotein essential for cerebral cortex development. In humans, recessive RELN variants cause cortical and cerebellar malformations, while heterozygous variants were associated with epilepsy, autism, and mild cortical abnormalities. However, the functional effects of RELN variants remain unknown. We identified inherited and de novo RELN missense variants in heterozygous patients with neuronal migration disorders (NMDs) as diverse as pachygyria and polymicrogyria. We investigated in culture and in the developing mouse cerebral cortex how different variants impacted RELN function. Polymicrogyria-associated variants behaved as gain-of-function, showing an enhanced ability to induce neuronal aggregation, while those linked to pachygyria behaved as loss-of-function, leading to defective neuronal aggregation/migration. The pachygyria-associated de novo heterozygous RELN variants acted as dominant-negative by preventing WT RELN secretion in culture, animal models, and patients, thereby causing dominant NMDs. We demonstrated how mutant RELN proteins in vitro and in vivo predict cortical malformation phenotypes, providing valuable insights into the pathogenesis of such disorders., Introduction The neocortex is composed of 6 layers that are built during embryonic development through highly orchestrated processes of successive generation of cohorts of glutamatergic neurons in the proliferative zones [...]

Published
2024
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3. De novo missense variants in phosphatidylinositol kinase PIP5KIγ underlie a neurodevelopmental syndrome associated with altered phosphoinositide signaling

Author

Acosta, Maria T., Adam, Margaret, Adams, David R., Alvarez, Raquel L., Alvey, Justin, Amendola, Laura, Andrews, Ashley, Ashley, Euan A., Bacino, Carlos A., Bademci, Guney, Balasubramanyam, Ashok, Baldridge, Dustin, Bale, Jim, Bamshad, Michael, Barbouth, Deborah, Bayrak-Toydemir, Pinar, Beck, Anita, Beggs, Alan H., Behrens, Edward, Bejerano, Gill, Bellen, Hugo J., Bennett, Jimmy, Berg-Rood, Beverly, Bernstein, Jonathan A., Berry, Gerard T., Bican, Anna, Bivona, Stephanie, Blue, Elizabeth, Bohnsack, John, Bonner, Devon, Botto, Lorenzo, Boyd, Brenna, Briere, Lauren C., Brown, Gabrielle, Burke, Elizabeth A., Burrage, Lindsay C., Butte, Manish J., Byers, Peter, Byrd, William E., Carey, John, Carrasquillo, Olveen, Cassini, Thomas, Chang, Ta Chen Peter, Chanprasert, Sirisak, Chao, Hsiao-Tuan, Clark, Gary D., Coakley, Terra R., Cobban, Laurel A., Cogan, Joy D., Coggins, Matthew, Cole, F. Sessions, Colley, Heather A., Cooper, Cynthia M., Cope, Heidi, Corona, Rosario, Craigen, William J., Crouse, Andrew B., Cunningham, Michael, D’Souza, Precilla, Dai, Hongzheng, Dasari, Surendra, Davis, Joie, Dayal, Jyoti G., Dell'Angelica, Esteban C., Dipple, Katrina, Doherty, Daniel, Dorrani, Naghmeh, Doss, Argenia L., Douine, Emilie D., Earl, Dawn, Eckstein, David J., Emrick, Lisa T., Eng, Christine M., Falk, Marni, Fieg, Elizabeth L., Fisher, Paul G., Fogel, Brent L., Forghani, Irman, Gahl, William A., Glass, Ian, Gochuico, Bernadette, Goddard, Page C., Godfrey, Rena A., Golden-Grant, Katie, Grajewski, Alana, Hadley, Don, Hahn, Sihoun, Halley, Meghan C., Hamid, Rizwan, Hassey, Kelly, Hayes, Nichole, High, Frances, Hing, Anne, Hisama, Fuki M., Holm, Ingrid A., Hom, Jason, Horike-Pyne, Martha, Huang, Alden, Hutchison, Sarah, Introne, Wendy, Isasi, Rosario, Izumi, Kosuke, Jamal, Fariha, Jarvik, Gail P., Jarvik, Jeffrey, Jayadev, Suman, Jean-Marie, Orpa, Jobanputra, Vaidehi, Karaviti, Lefkothea, Ketkar, Shamika, Kiley, Dana, Kilich, Gonench, Kobren, Shilpa N., Kohane, Isaac S., Kohler, Jennefer N., Korrick, Susan, Kozuira, Mary, Krakow, Deborah, Krasnewich, Donna M., Kravets, Elijah, Lalani, Seema R., Lam, Byron, Lam, Christina, Lanpher, Brendan C., Lanza, Ian R., LeBlanc, Kimberly, Lee, Brendan H., Levitt, Roy, Lewis, Richard A., Liu, Pengfei, Liu, Xue Zhong, Longo, Nicola, Loo, Sandra K., Loscalzo, Joseph, Maas, Richard L., Macnamara, Ellen F., MacRae, Calum A., Maduro, Valerie V., Maghiro, AudreyStephannie, Mahoney, Rachel, Malicdan, May Christine V., Mamounas, Laura A., Manolio, Teri A., Mao, Rong, Maravilla, Kenneth, Marom, Ronit, Marth, Gabor, Martin, Beth A., Martin, Martin G., Martínez-Agosto, Julian A., Marwaha, Shruti, McCauley, Jacob, McConkie-Rosell, Allyn, McCray, Alexa T., McGee, Elisabeth, Mefford, Heather, Merritt, J. Lawrence, Might, Matthew, Mirzaa, Ghayda, Morava, Eva, Moretti, Paolo, Mulvihill, John, Nakano-Okuno, Mariko, Nelson, Stanley F., Newman, John H., Nicholas, Sarah K., Nickerson, Deborah, Nieves-Rodriguez, Shirley, Novacic, Donna, Oglesbee, Devin, Orengo, James P., Pace, Laura, Pak, Stephen, Pallais, J. Carl, Palmer, Christina G.S., Papp, Jeanette C., Parker, Neil H., Phillips III, John A., Posey, Jennifer E., Potocki, Lorraine, Pusey Swerdzewski, Barbara N., Quinlan, Aaron, Rao, Deepak A., Raper, Anna, Raskind, Wendy, Renteria, Genecee, Reuter, Chloe M., Rives, Lynette, Robertson, Amy K., Rodan, Lance H., Rosenfeld, Jill A., Rosenwasser, Natalie, Rossignol, Francis, Ruzhnikov, Maura, Sacco, Ralph, Sampson, Jacinda B., Saporta, Mario, Schaechter, Judy, Schedl, Timothy, Schoch, Kelly, Scott, Daryl A., Scott, C. Ron, Shashi, Vandana, Shin, Jimann, Silverman, Edwin K., Sinsheimer, Janet S., Sisco, Kathy, Smith, Edward C., Smith, Kevin S., Solnica-Krezel, Lilianna, Solomon, Ben, Spillmann, Rebecca C., Stoler, Joan M., Sullivan, Kathleen, Sullivan, Jennifer A., Sun, Angela, Sutton, Shirley, Sweetser, David A., Sybert, Virginia, Tabor, Holly K., Tan, Queenie K.-G., Tan, Amelia L.M., Tekin, Mustafa, Telischi, Fred, Thorson, Willa, Tifft, Cynthia J., Toro, Camilo, Tran, Alyssa A., Ungar, Rachel A., Urv, Tiina K., Vanderver, Adeline, Velinder, Matt, Viskochil, Dave, Vogel, Tiphanie P., Wahl, Colleen E., Walker, Melissa, Wallace, Stephanie, Walley, Nicole M., Wambach, Jennifer, Wan, Jijun, Wang, Lee-kai, Wangler, Michael F., Ward, Patricia A., Wegner, Daniel, Weisz Hubshman, Monika, Wener, Mark, Wenger, Tara, Westerfield, Monte, Wheeler, Matthew T., Whitlock, Jordan, Wolfe, Lynne A., Worley, Kim, Xiao, Changrui, Yamamoto, Shinya, Yang, John, Zhang, Zhe, Zuchner, Stephan, Nigro, Vincenzo, Torella, Annalaura, Morleo, Manuela, Spampanato, Carmine, Pinelli, Michele, Banfi, Sandro, Varavallo, Alessandra, Selicorni, Angelo, Mariani, Milena, Massimello, Marta, Daolio, Cecilia, Capra, Valeria, Accogli, Andrea, Scala, Marcello, Leuzzi, Vincenzo, Nardecchia, Francesca, Galosi, Serena, Mastrangelo, Mario, Milani, Donatella, Vitiello, Giuseppina, Piluso, Giulio, Romano, Corrado, Failla, Pinella, Greco, Donatella, Pantaleoni, Chiara, Ciaccio, Claudia, D’Arrigo, Stefano, Brunetti Pierri, Nicola, Parenti, Giancarlo, Coppola, Antonietta, Mattina, Teresa, Zollino, Marcella, Amenta, Simona, Tummolo, Albina, Santoro, Claudia, Grandone, Anna, De Brasi, Daniele, Varone, Antonio, Garavelli, Livia, Marini, Carla, Bigoni, Stefania, Piscopo, Carmelo, Trabacca, Antonio, De Rinaldis, Marta, Peron, Angela, Venditti, Rossella, Theodorou, Evangelos, Rosello, Marion, Tirozzi, Alfonsina, Tammaro, Roberta, Al-Badri, Nour, High, Frances A., Shi, Jiahai, Putti, Elena, Ferrante, Luigi, Cetrangolo, Viviana, Walker, Melissa A., Tenconi, Romano, Iascone, Maria, Mei, Davide, Guerrini, Renzo, van der Smagt, Jasper, Kroes, Hester Y., van Gassen, Koen L.I., Bilal, Muhammad, Umair, Muhammad, Pingault, Veronica, Attie-Bitach, Tania, Amiel, Jeannine, Ejaz, Resham, Rodan, Lance, Agrawal, Pankaj B., Del Bene, Filippo, and Franco, Brunella

Published
2023
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5. Base-editing-mediated dissection of a γ-globin cis-regulatory element for the therapeutic reactivation of fetal hemoglobin expression

Author

Antoniou, Panagiotis, Hardouin, Giulia, Martinucci, Pierre, Frati, Giacomo, Felix, Tristan, Chalumeau, Anne, Fontana, Letizia, Martin, Jeanne, Masson, Cecile, Brusson, Megane, Maule, Giulia, Rosello, Marion, Giovannangeli, Carine, Abramowski, Vincent, de Villartay, Jean-Pierre, Concordet, Jean-Paul, Del Bene, Filippo, El Nemer, Wassim, Amendola, Mario, Cavazzana, Marina, Cereseto, Anna, Romano, Oriana, and Miccio, Annarita

Published
2022
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7. De novo missense variants in phosphatidylinositol kinase PIP5KIγ underlie a neurodevelopmental syndrome associated with altered phosphoinositide signaling

Author

Morleo, Manuela, primary, Venditti, Rossella, additional, Theodorou, Evangelos, additional, Briere, Lauren C., additional, Rosello, Marion, additional, Tirozzi, Alfonsina, additional, Tammaro, Roberta, additional, Al-Badri, Nour, additional, High, Frances A., additional, Shi, Jiahai, additional, Putti, Elena, additional, Ferrante, Luigi, additional, Cetrangolo, Viviana, additional, Torella, Annalaura, additional, Walker, Melissa A., additional, Tenconi, Romano, additional, Iascone, Maria, additional, Mei, Davide, additional, Guerrini, Renzo, additional, van der Smagt, Jasper, additional, Kroes, Hester Y., additional, van Gassen, Koen L.I., additional, Bilal, Muhammad, additional, Umair, Muhammad, additional, Pingault, Veronica, additional, Attie-Bitach, Tania, additional, Amiel, Jeannine, additional, Ejaz, Resham, additional, Rodan, Lance, additional, Zollino, Marcella, additional, Agrawal, Pankaj B., additional, Del Bene, Filippo, additional, Nigro, Vincenzo, additional, Sweetser, David A., additional, Franco, Brunella, additional, Acosta, Maria T., additional, Adam, Margaret, additional, Adams, David R., additional, Alvarez, Raquel L., additional, Alvey, Justin, additional, Amendola, Laura, additional, Andrews, Ashley, additional, Ashley, Euan A., additional, Bacino, Carlos A., additional, Bademci, Guney, additional, Balasubramanyam, Ashok, additional, Baldridge, Dustin, additional, Bale, Jim, additional, Bamshad, Michael, additional, Barbouth, Deborah, additional, Bayrak-Toydemir, Pinar, additional, Beck, Anita, additional, Beggs, Alan H., additional, Behrens, Edward, additional, Bejerano, Gill, additional, Bellen, Hugo J., additional, Bennett, Jimmy, additional, Berg-Rood, Beverly, additional, Bernstein, Jonathan A., additional, Berry, Gerard T., additional, Bican, Anna, additional, Bivona, Stephanie, additional, Blue, Elizabeth, additional, Bohnsack, John, additional, Bonner, Devon, additional, Botto, Lorenzo, additional, Boyd, Brenna, additional, Brown, Gabrielle, additional, Burke, Elizabeth A., additional, Burrage, Lindsay C., additional, Butte, Manish J., additional, Byers, Peter, additional, Byrd, William E., additional, Carey, John, additional, Carrasquillo, Olveen, additional, Cassini, Thomas, additional, Chang, Ta Chen Peter, additional, Chanprasert, Sirisak, additional, Chao, Hsiao-Tuan, additional, Clark, Gary D., additional, Coakley, Terra R., additional, Cobban, Laurel A., additional, Cogan, Joy D., additional, Coggins, Matthew, additional, Cole, F. Sessions, additional, Colley, Heather A., additional, Cooper, Cynthia M., additional, Cope, Heidi, additional, Corona, Rosario, additional, Craigen, William J., additional, Crouse, Andrew B., additional, Cunningham, Michael, additional, D’Souza, Precilla, additional, Dai, Hongzheng, additional, Dasari, Surendra, additional, Davis, Joie, additional, Dayal, Jyoti G., additional, Dell'Angelica, Esteban C., additional, Dipple, Katrina, additional, Doherty, Daniel, additional, Dorrani, Naghmeh, additional, Doss, Argenia L., additional, Douine, Emilie D., additional, Earl, Dawn, additional, Eckstein, David J., additional, Emrick, Lisa T., additional, Eng, Christine M., additional, Falk, Marni, additional, Fieg, Elizabeth L., additional, Fisher, Paul G., additional, Fogel, Brent L., additional, Forghani, Irman, additional, Gahl, William A., additional, Glass, Ian, additional, Gochuico, Bernadette, additional, Goddard, Page C., additional, Godfrey, Rena A., additional, Golden-Grant, Katie, additional, Grajewski, Alana, additional, Hadley, Don, additional, Hahn, Sihoun, additional, Halley, Meghan C., additional, Hamid, Rizwan, additional, Hassey, Kelly, additional, Hayes, Nichole, additional, High, Frances, additional, Hing, Anne, additional, Hisama, Fuki M., additional, Holm, Ingrid A., additional, Hom, Jason, additional, Horike-Pyne, Martha, additional, Huang, Alden, additional, Hutchison, Sarah, additional, Introne, Wendy, additional, Isasi, Rosario, additional, Izumi, Kosuke, additional, Jamal, Fariha, additional, Jarvik, Gail P., additional, Jarvik, Jeffrey, additional, Jayadev, Suman, additional, Jean-Marie, Orpa, additional, Jobanputra, Vaidehi, additional, Karaviti, Lefkothea, additional, Ketkar, Shamika, additional, Kiley, Dana, additional, Kilich, Gonench, additional, Kobren, Shilpa N., additional, Kohane, Isaac S., additional, Kohler, Jennefer N., additional, Korrick, Susan, additional, Kozuira, Mary, additional, Krakow, Deborah, additional, Krasnewich, Donna M., additional, Kravets, Elijah, additional, Lalani, Seema R., additional, Lam, Byron, additional, Lam, Christina, additional, Lanpher, Brendan C., additional, Lanza, Ian R., additional, LeBlanc, Kimberly, additional, Lee, Brendan H., additional, Levitt, Roy, additional, Lewis, Richard A., additional, Liu, Pengfei, additional, Liu, Xue Zhong, additional, Longo, Nicola, additional, Loo, Sandra K., additional, Loscalzo, Joseph, additional, Maas, Richard L., additional, Macnamara, Ellen F., additional, MacRae, Calum A., additional, Maduro, Valerie V., additional, Maghiro, AudreyStephannie, additional, Mahoney, Rachel, additional, Malicdan, May Christine V., additional, Mamounas, Laura A., additional, Manolio, Teri A., additional, Mao, Rong, additional, Maravilla, Kenneth, additional, Marom, Ronit, additional, Marth, Gabor, additional, Martin, Beth A., additional, Martin, Martin G., additional, Martínez-Agosto, Julian A., additional, Marwaha, Shruti, additional, McCauley, Jacob, additional, McConkie-Rosell, Allyn, additional, McCray, Alexa T., additional, McGee, Elisabeth, additional, Mefford, Heather, additional, Merritt, J. Lawrence, additional, Might, Matthew, additional, Mirzaa, Ghayda, additional, Morava, Eva, additional, Moretti, Paolo, additional, Mulvihill, John, additional, Nakano-Okuno, Mariko, additional, Nelson, Stanley F., additional, Newman, John H., additional, Nicholas, Sarah K., additional, Nickerson, Deborah, additional, Nieves-Rodriguez, Shirley, additional, Novacic, Donna, additional, Oglesbee, Devin, additional, Orengo, James P., additional, Pace, Laura, additional, Pak, Stephen, additional, Pallais, J. Carl, additional, Palmer, Christina G.S., additional, Papp, Jeanette C., additional, Parker, Neil H., additional, Phillips III, John A., additional, Posey, Jennifer E., additional, Potocki, Lorraine, additional, Pusey Swerdzewski, Barbara N., additional, Quinlan, Aaron, additional, Rao, Deepak A., additional, Raper, Anna, additional, Raskind, Wendy, additional, Renteria, Genecee, additional, Reuter, Chloe M., additional, Rives, Lynette, additional, Robertson, Amy K., additional, Rodan, Lance H., additional, Rosenfeld, Jill A., additional, Rosenwasser, Natalie, additional, Rossignol, Francis, additional, Ruzhnikov, Maura, additional, Sacco, Ralph, additional, Sampson, Jacinda B., additional, Saporta, Mario, additional, Schaechter, Judy, additional, Schedl, Timothy, additional, Schoch, Kelly, additional, Scott, Daryl A., additional, Scott, C. Ron, additional, Shashi, Vandana, additional, Shin, Jimann, additional, Silverman, Edwin K., additional, Sinsheimer, Janet S., additional, Sisco, Kathy, additional, Smith, Edward C., additional, Smith, Kevin S., additional, Solnica-Krezel, Lilianna, additional, Solomon, Ben, additional, Spillmann, Rebecca C., additional, Stoler, Joan M., additional, Sullivan, Kathleen, additional, Sullivan, Jennifer A., additional, Sun, Angela, additional, Sutton, Shirley, additional, Sybert, Virginia, additional, Tabor, Holly K., additional, Tan, Queenie K.-G., additional, Tan, Amelia L.M., additional, Tekin, Mustafa, additional, Telischi, Fred, additional, Thorson, Willa, additional, Tifft, Cynthia J., additional, Toro, Camilo, additional, Tran, Alyssa A., additional, Ungar, Rachel A., additional, Urv, Tiina K., additional, Vanderver, Adeline, additional, Velinder, Matt, additional, Viskochil, Dave, additional, Vogel, Tiphanie P., additional, Wahl, Colleen E., additional, Walker, Melissa, additional, Wallace, Stephanie, additional, Walley, Nicole M., additional, Wambach, Jennifer, additional, Wan, Jijun, additional, Wang, Lee-kai, additional, Wangler, Michael F., additional, Ward, Patricia A., additional, Wegner, Daniel, additional, Weisz Hubshman, Monika, additional, Wener, Mark, additional, Wenger, Tara, additional, Westerfield, Monte, additional, Wheeler, Matthew T., additional, Whitlock, Jordan, additional, Wolfe, Lynne A., additional, Worley, Kim, additional, Xiao, Changrui, additional, Yamamoto, Shinya, additional, Yang, John, additional, Zhang, Zhe, additional, Zuchner, Stephan, additional, Morleo, Manuela, additional, Spampanato, Carmine, additional, Pinelli, Michele, additional, Banfi, Sandro, additional, Varavallo, Alessandra, additional, Selicorni, Angelo, additional, Mariani, Milena, additional, Massimello, Marta, additional, Daolio, Cecilia, additional, Capra, Valeria, additional, Accogli, Andrea, additional, Scala, Marcello, additional, Leuzzi, Vincenzo, additional, Nardecchia, Francesca, additional, Galosi, Serena, additional, Mastrangelo, Mario, additional, Milani, Donatella, additional, Vitiello, Giuseppina, additional, Piluso, Giulio, additional, Romano, Corrado, additional, Failla, Pinella, additional, Greco, Donatella, additional, Pantaleoni, Chiara, additional, Ciaccio, Claudia, additional, D’Arrigo, Stefano, additional, Brunetti Pierri, Nicola, additional, Parenti, Giancarlo, additional, Coppola, Antonietta, additional, Mattina, Teresa, additional, Amenta, Simona, additional, Tummolo, Albina, additional, Santoro, Claudia, additional, Grandone, Anna, additional, De Brasi, Daniele, additional, Varone, Antonio, additional, Garavelli, Livia, additional, Marini, Carla, additional, Bigoni, Stefania, additional, Piscopo, Carmelo, additional, Trabacca, Antonio, additional, De Rinaldis, Marta, additional, and Peron, Angela, additional

Published
2023
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8. De novo missense variants in phosphatidylinositol kinase PIP5KIγ underlie a neurodevelopmental syndrome associated with altered phosphoinositide signaling

Author

Morleo, Manuela, Venditti, Rossella, Theodorou, Evangelos, Briere, Lauren C, Rosello, Marion, Tirozzi, Alfonsina, Tammaro, Roberta, Al-Badri, Nour, High, Frances A, Shi, Jiahai, Putti, Elena, Ferrante, Luigi, Cetrangolo, Viviana, Torella, Annalaura, Walker, Melissa A, Tenconi, Romano, Iascone, Maria, Mei, Davide, Guerrini, Renzo, van der Smagt, Jasper, Kroes, Hester Y, van Gassen, Koen L I, Bilal, Muhammad, Umair, Muhammad, Pingault, Veronica, Attie-Bitach, Tania, Amiel, Jeannine, Ejaz, Resham, Rodan, Lance, Zollino, Marcella, Agrawal, Pankaj B, Del Bene, Filippo, Nigro, Vincenzo, Sweetser, David A, Franco, Brunella, Morleo, Manuela, Venditti, Rossella, Theodorou, Evangelo, Briere, Lauren C, Rosello, Marion, Tirozzi, Alfonsina, Tammaro, Roberta, Al-Badri, Nour, High, Frances A, Shi, Jiahai, Putti, Elena, Ferrante, Luigi, Cetrangolo, Viviana, Torella, Annalaura, Walker, Melissa A, Tenconi, Romano, Iascone, Maria, Mei, Davide, Guerrini, Renzo, van der Smagt, Jasper, Kroes, Hester Y, van Gassen, Koen L I, Bilal, Muhammad, Umair, Muhammad, Pingault, Veronica, Attie-Bitach, Tania, Amiel, Jeannine, Ejaz, Resham, Rodan, Lance, Zollino, Marcella, Agrawal, Pankaj B, Del Bene, Filippo, Nigro, Vincenzo, Sweetser, David A, and Franco, Brunella

Subjects
PIP5K1C, developmental delay, intellectual disability, phosphatidylinositol 4,5 bisphosphate (PI(4,5)P(2)), de novo gain-of-function variant, zebrafish, endosome, phosphoinositide
Abstract

Phosphoinositides (PIs) are membrane phospholipids produced through the local activity of PI kinases and phosphatases that selectively add or remove phosphate groups from the inositol head group. PIs control membrane composition and play key roles in many cellular processes including actin dynamics, endosomal trafficking, autophagy, and nuclear functions. Mutations in phosphatidylinositol 4,5 bisphosphate [PI(4,5)P2] phosphatases cause a broad spectrum of neurodevelopmental disorders such as Lowe and Joubert syndromes and congenital muscular dystrophy with cataracts and intellectual disability, which are thus associated with increased levels of PI(4,5)P2. Here, we describe a neurodevelopmental disorder associated with an increase in the production of PI(4,5)P2 and with PI-signaling dysfunction. We identified three de novo heterozygous missense variants in PIP5K1C, which encodes an isoform of the phosphatidylinositol 4-phosphate 5-kinase (PIP5KIγ), in nine unrelated children exhibiting intellectual disability, developmental delay, acquired microcephaly, seizures, visual abnormalities, and dysmorphic features. We provide evidence that the PIP5K1C variants result in an increase of the endosomal PI(4,5)P2 pool, giving rise to ectopic recruitment of filamentous actin at early endosomes (EEs) that in turn causes dysfunction in EE trafficking. In addition, we generated an invivo zebrafish model that recapitulates the disorder we describe with developmental defects affecting the forebrain, including the eyes, as well as craniofacial abnormalities, further demonstrating the pathogenic effect of the PIP5K1C variants.

Published
2023

10. Dominantly acting KIF5B variants with pleiotropic cellular consequences cause variable clinical phenotypes

Author

Flex, Elisabetta, primary, Albadri, Shahad, additional, Radio, Francesca Clementina, additional, Cecchetti, Serena, additional, Lauri, Antonella, additional, Priolo, Manuela, additional, Kissopoulos, Marta, additional, Carpentieri, Giovanna, additional, Fasano, Giulia, additional, Venditti, Martina, additional, Magliocca, Valentina, additional, Bellacchio, Emanuele, additional, Welch, Carrie L, additional, Colombo, Paolo C, additional, Kochav, Stephanie M, additional, Chang, Richard, additional, Barrick, Rebekah, additional, Trivisano, Marina, additional, Micalizzi, Alessia, additional, Borghi, Rossella, additional, Messina, Elena, additional, Mancini, Cecilia, additional, Pizzi, Simone, additional, De Santis, Flavia, additional, Rosello, Marion, additional, Specchio, Nicola, additional, Compagnucci, Claudia, additional, McWalter, Kirsty, additional, Chung, Wendy K, additional, Del Bene, Filippo, additional, and Tartaglia, Marco, additional

Published
2022
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11. Cover Image

Author

Krasovec, Gabriel, primary, Pottin, Karen, additional, Rosello, Marion, additional, Quéinnec, Éric, additional, and Chambon, Jean‐Philippe, additional

Published
2021
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12. Base Editing-Mediated Dissection of the -200 Region of the γ-Globin Promoters to Induce Fetal Hemoglobin and Rescue Sickle Cell Disease and β-Thalassemia

Author

Antoniou, Panagiotis, primary, Hardouin, Giulia, additional, Martinucci, Pierre, additional, Felix, Tristan, additional, Fontana, Letizia, additional, Martin, Jeanne, additional, Frati, Giacomo, additional, Brusson, Megane, additional, Rosello, Marion, additional, Maule, Giulia, additional, Del Bene, Filippo, additional, Cereseto, Anna, additional, El Nemer, Wassim, additional, Concordet, Jean-Paul, additional, and Miccio, Annarita, additional

Published
2021
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13. Myosin-1b interacts with UNC45A and controls intestinal epithelial morphogenesis

Author

Revenu des Courtils, Céline, primary, Parlato, Marianna, additional, Rosello, Marion, additional, Duroure, Karine, additional, Duclaux-Loras, Rémi, additional, Nicolle, Ophélie, additional, Prospéri, Marie-Thérèse, additional, Stoufflet, Julie, additional, Vougny, Juliette, additional, Lebreton, Corinne, additional, Lépine, Priscilla, additional, Michaux, Grégoire, additional, Cerf-Benssusan, Nadine, additional, Coudrier, Evelyne, additional, and Del Bene, Filippo, additional

Published
2021
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19. Editing the LRF Repressor Binding Site in the γ-Globin Promoters Induces Therapeutically Relevant Fetal Hemoglobin Levels for the Treatment of β-Hemoglobinopathies

Author

Frati, Giacomo, primary, Antoniou, Panagiotis, additional, Hardouin, Giulia, additional, Mlaya, Bochra, additional, Weber, Leslie, additional, Felix, Tristan, additional, Casini, Antonio, additional, Rosello, Marion, additional, Chalumeau, Anne, additional, Amendola, Mario, additional, Thrasher, Adrian J., additional, Turchiano, Giandomenico, additional, Del Bene, Filippo, additional, El Nemer, Wassim, additional, Cereseto, Anna, additional, Concordet, Jean-Paul, additional, Giovannangeli, Carine, additional, Cavazzana, Marina, additional, and Miccio, Annarita, additional

Published
2020
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20. Apoptosis and cell proliferation during metamorphosis of the planula larva of Clytia hemisphaerica (Hydrozoa, Cnidaria).

Author

Krasovec, Gabriel, Pottin, Karen, Rosello, Marion, Quéinnec, Éric, and Chambon, Jean‐Philippe

Subjects
METAMORPHOSIS, CELL proliferation, HYDROZOA, LARVAE, CNIDARIA, CELL cycle
Abstract

Background: Metamorphosis in marine species is characterized by profound changes at the ecophysiological, morphological, and cellular levels. The cnidarian Clytia hemisphaerica exhibits a triphasic life cycle that includes a planula larva, a colonial polyp, and a sexually reproductive medusa. Most studies so far have focused on the embryogenesis of this species, whereas its metamorphosis has been only partially studied. Results: We investigated the main morphological changes of the planula larva of Clytia during the metamorphosis, and the associated cell proliferation and apoptosis. Based on our observations of planulae at successive times following artificial metamorphosis induction using GLWamide, we subdivided the Clytia's metamorphosis into a series of eight morphological stages occurring during a pre‐settlement phase (from metamorphosis induction to planula ready for settlement) and the post‐settlement phase (from planula settlement to primary polyp). Drastic morphological changes prior to definitive adhesion to the substrate were accompanied by specific patterns of stem‐cell proliferation as well as apoptosis in both ectoderm and endoderm. Further waves of apoptosis occurring once the larva has settled were associated with morphogenesis of the primary polyp. Conclusion: Clytia larval metamorphosis is characterized by distinct patterns of apoptosis and cell proliferation during the pre‐settlement phase and the settled planula‐to‐polyp transformation. Key Findings: Here, we described for the first time the dynamics process of the larva metamorphosis of the well‐established model of cnidarian Clytia hemisphaerica at the morphological and cellular scale.This fundamental descriptive work brought out that metamorphosis start before the settlement, in opposite with the usually accepted view in marine animals.At the cellular level we characterized apoptosis, proliferation and migration implicated in major transformations. One of them is the adhesive structure offset laterally, an unexpected characteristic in a cnidarian. [ABSTRACT FROM AUTHOR]

Published
2021
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23. Dominantly acting KIF5B variants with pleiotropic cellular consequences cause variable clinical phenotypes.

Author

Flex E, Albadri S, Radio FC, Cecchetti S, Lauri A, Priolo M, Kissopoulos M, Carpentieri G, Fasano G, Venditti M, Magliocca V, Bellacchio E, Welch CL, Colombo PC, Kochav SM, Chang R, Barrick R, Trivisano M, Micalizzi A, Borghi R, Messina E, Mancini C, Pizzi S, De Santis F, Rosello M, Specchio N, Compagnucci C, McWalter K, Chung WK, Del Bene F, and Tartaglia M

Subjects
Animals, Humans, Mammals metabolism, Muscle Hypotonia, Neurons metabolism, Phenotype, Zebrafish genetics, Zebrafish metabolism, Kinesins genetics, Kinesins metabolism
Abstract

Kinesins are motor proteins involved in microtubule (MT)-mediated intracellular transport. They contribute to key cellular processes, including intracellular trafficking, organelle dynamics and cell division. Pathogenic variants in kinesin-encoding genes underlie several human diseases characterized by an extremely variable clinical phenotype, ranging from isolated neurodevelopmental/neurodegenerative disorders to syndromic phenotypes belonging to a family of conditions collectively termed as 'ciliopathies.' Among kinesins, kinesin-1 is the most abundant MT motor for transport of cargoes towards the plus end of MTs. Three kinesin-1 heavy chain isoforms exist in mammals. Different from KIF5A and KIF5C, which are specifically expressed in neurons and established to cause neurological diseases when mutated, KIF5B is an ubiquitous protein. Three de novo missense KIF5B variants were recently described in four subjects with a syndromic skeletal disorder characterized by kyphomelic dysplasia, hypotonia and DD/ID. Here, we report three dominantly acting KIF5B variants (p.Asn255del, p.Leu498Pro and p.Leu537Pro) resulting in a clinically wide phenotypic spectrum, ranging from dilated cardiomyopathy with adult-onset ophthalmoplegia and progressive skeletal myopathy to a neurodevelopmental condition characterized by severe hypotonia with or without seizures. In vitro and in vivo analyses provide evidence that the identified disease-associated KIF5B variants disrupt lysosomal, autophagosome and mitochondrial organization, and impact cilium biogenesis. All variants, and one of the previously reported missense changes, were shown to affect multiple developmental processes in zebrafish. These findings document pleiotropic consequences of aberrant KIF5B function on development and cell homeostasis, and expand the phenotypic spectrum resulting from altered kinesin-mediated processes., (© The Author(s) 2022. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)

Published
2023
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