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1. Characteristics of Patients with Hereditary Transthyretin Amyloidosis-Polyneuropathy (ATTRv-PN) in NEURO-TTRansform, an Open-label Phase 3 Study of Eplontersen

Author

Coelho, Teresa, Waddington Cruz, Márcia, Chao, Chi-Chao, Parman, Yeşim, Wixner, Jonas, Weiler, Markus, Barroso, Fabio A., Dasgupta, Noel R., Jung, Shiangtung W., Schneider, Eugene, Viney, Nicholas J., Dyck, P. James B., Ando, Yukio, Gillmore, Julian D., Khella, Sami, Gertz, Morie A., Obici, Laura, and Berk, John L.

Published
2023
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2. Utilidad de la identificación de anticuerpos en miopatías inflamatorias: revisión

Author

Pirra, Laura, Tillard, Belen, Zuberhbuler, Paz, Cisneros, Elisa, Bendersky, Mariana, León Cejas, Luciana, Aguirre, Florencia, Alvarez, Valeria, Barroso, Fabio, Berardo, Andrés, Bettini, Mariela, Borrelli, Mariano, Chaves, Marcelo, Chloca, Fernando, Crespo, José, di Egidio, Marianna, Dubrovsky, Alberto, Figueredo, María Alejandra, Gargiulo, Gisella, Jáuregui, Agustín, Landriscina, Paula, Lautre, Andrea, Martínez Perea, María del Carmen, Pivetta, Paola, Quarracino, Cecilia, Rattagan, María Lucía, Reisin, Ricardo, Rey, Roberto, Rodriguez, Alejandro, Rodriguez, Gabriel E., Rugiero, Marcelo, Salutto, Valeria L., and Conti, Eugenia

Published
2023
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3. Utilidad de los anticuerpos en las enfermedades de la unión neuromuscular: revisión

Author

Salutto, Valeria L., Bendersky, Mariana, Aguirre, Florencia, Alvarez, Valeria, Barroso, Fabio, Berardo, Andrés, Bettini, Mariela, Borrelli, Mariano M., Chaves, Marcelo, Cisneros, Elisa M., Conti, Eugenia, Crespo, José M., Di Egidio, Marianna, Dubrovsky, Alberto, Figueredo, María Alejandra, Gargiulo, Gisella, Jáuregui, Agustín, Landriscina, Paula, León Cejas, Luciana, Martínez Perea, María del Carmen, Pirra, Laura, Pivetta, Paola, Quarracino, Cecilia, Rattagan, María Lucía, Rodriguez, Alejandro, Rodriguez, Gabriel E., Rugiero, Marcelo, Tillard, Belen, Zuberhbuler, Paz, Reisin, Ricardo, and Rey, Roberto

Published
2022
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5. Temporal Trends of Wild-Type Transthyretin Amyloid Cardiomyopathy in the Transthyretin Amyloidosis Outcomes Survey

Author

Barroso, Fabio Adrian, Van Cleemput, Johan, Fine, Nowell, Schmidt, Hartmut, Gess, Burkhard, Moelgaard, Henning, Planté-Bordeneuve, Violaine, Adams, David, Inamo, Jocelyn, Vita, Giuseppe, Cirami, Calogero Lino, Luigetti, Marco, Emdin, Michele, Sekijima, Yoshiki, Yamashita, Taro, Jeon, Eun-Seok, Gonzalez Duarte Briseno, Maria Alejandra, Nienhuis, Hans, Azevedo, Olga, Campistol Plana, Josep Maria, Moreno, Juan Gonzalez, Costello, Jose Gonzalez, Wixner, Jonas, Parman, Yesim, Shah, Sanjiv, Quan, Dianna, Marburger, Tessa, Polydefkis, Michael, Gottlieb, Stephen, Ralph, Jeffrey, Sarswat, Nitasha, Luo, Jin, Murali, Srinivas, Cotts, William, Drachman, Brian, Steidley, David, Hummel, Scott, Slosky, David, Ventura, Hector, Jacoby, Daniel, Hoffman, James, Tauras, James, Zivkovic, Sasa, Tallaj, Jose, Lenihan, Daniel, Mueller, Christopher, Nativi-Nicolau, Jose, Siu, Alfonso, Dispenzieri, Angela, Maurer, Mathew S., Rapezzi, Claudio, Kristen, Arnt V., Garcia-Pavia, Pablo, LoRusso, Samantha, Waddington-Cruz, Márcia, Lairez, Olivier, Witteles, Ronald, Chapman, Doug, Amass, Leslie, and Grogan, Martha

Published
2021
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7. Predicting Outcome in Guillain-Barré Syndrome: International Validation of the Modified Erasmus GBS Outcome Score

Author

Doets, Alex Y, Lingsma, Hester F, Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Yamagishi, Yuko, Kusunoki, Susumu, Dimachkie, Mazen M, Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H, Chavada, Govindsinh, Willison, Hugh J, Casasnovas, Carlos, Bateman, Kathleen, Miller, James AL, van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E, Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A, Shahrizaila, Nortina, Galassi, Giuliana, Péréon, Yann, Bürmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P, Marchesoni, Cintia, Sedano Tous, María J, Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H, Lehmann, Helmar C, Granit, Volkan, Cavaletti, Guido, Gutiérrez-Gutiérrez, Gerardo, Barroso, Fabio A, Visser, Leo H, Katzberg, Hans D, Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J, Eftimov, Filip, Wirtz, Paul W, Samijn, Johnny PA, Gilhuis, H Jacobus, Hadden, Robert DM, Holt, James KL, Sheikh, Kazim A, Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E, Faber, Catharina G, Gijsbers, Cees J, Busby, Mark, Roberts, Rhys C, Silvestri, Nicholas J, Fazio, Raffaella, van Dijk, Gert W, Garssen, Marcel PJ, Straathof, Chiara SM, Gorson, Kenneth C, and Jacobs, Bart C

Published
2021
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9. Guillain–Barré Syndrome and COVID-19 Vaccine: A Multicenter Retrospective Study of 46 Cases

Author

Castiglione, Juan Ignacio, primary, Crespo, José Manuel, additional, Bendersky, Mariana, additional, Silveira, Facundo Oscar, additional, Lecchini, Lucila, additional, Luis, María Belén, additional, Zambrano, Francisco Caiza, additional, Cotti, Norberto, additional, Simison, Conrado J., additional, Aguirre, Florencia, additional, Piedrabuena, María Agustina, additional, Alonso, Ricardo Nicolás, additional, Azcona, Carolina Laura, additional, Sosa, Pablo Sebastian, additional, Maldonado, Evangelina, additional, Varela, Francisco, additional, Bettini, Mariela, additional, Rey, Roberto D., additional, Cejas, Luciana León, additional, Rugiero, Marcelo, additional, Reisin, Ricardo, additional, and Barroso, Fabio, additional

Published
2023
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10. Cerebrospinal Fluid Findings in Relation to Clinical Characteristics, Subtype, and Disease Course in Patients With Guillain-Barré Syndrome

Author

Al-Hakem, Helle, primary, Doets, Alex Y, additional, Stino, Amro Maher, additional, Zivkovic, Sasha A., additional, Andersen, Henning, additional, Willison, Hugh J, additional, Cornblath, David R, additional, Gorson, Kenneth C, additional, Islam, Zhahirul, additional, Mohammad, Quazi Deen, additional, Sindrup, Søren Hein, additional, Kusunoki, Susumu, additional, Davidson, Amy, additional, Casasnovas, Carlos, additional, Bateman, Kathleen, additional, Miller, James AL, additional, van den Berg, Bianca, additional, Verboon, Christine, additional, Roodbol, Joyce, additional, Leonhard, Sonja E, additional, Arends, Samuel, additional, Luijten, Linda W G, additional, Benedetti, Luana, additional, Kuwabara, Satoshi, additional, Van den Bergh, Peter, additional, Monges, Soledad, additional, Marfia, Girolama A, additional, Shahrizaila, Nortina, additional, Galassi, Giuliana, additional, Pereon, Yann, additional, Bürmann, Jan, additional, Kuitwaard, Krista, additional, Kleyweg, Ruud P, additional, Marchesoni, Cintia, additional, Sedano Tous, María J, additional, Querol, Luis, additional, Martín-Aguilar, Lorena, additional, Wang, Yuzhong, additional, Nobile-Orazio, Eduardo, additional, Rinaldi, Simon, additional, Schenone, Angelo, additional, Pardo, Julio, additional, Vermeij, Frederique H, additional, Waheed, Waqar, additional, Lehmann, Helmar C, additional, Granit, Volkan, additional, Stein, Beth, additional, Cavaletti, Guido, additional, Gutiérrez-Gutiérrez, Gerardo, additional, Barroso, Fabio A, additional, Visser, Leo H, additional, Katzberg, Hans D, additional, Dardiotis, Efthimios, additional, Attarian, Shahram, additional, van der Kooi, Anneke J, additional, Eftimov, Filip, additional, Wirtz, Paul W, additional, PA Samijn, Johnny, additional, Gilhuis, H Jacobus, additional, DM Hadden, Robert, additional, Holt, James KL, additional, Sheikh, Kazim A, additional, Kolb, Noah, additional, Karafiath, Summer, additional, Vytopil, Michal, additional, Antonini, Giovanni, additional, Feasby, Thomas E, additional, Faber, Catharina, additional, Kramers, Hans, additional, Busby, Mark, additional, Roberts, Rhys C, additional, Silvestri, Nicholas J, additional, Fazio, Raffaella, additional, van Dijk, Gert W, additional, Garssen, Marcel PJ, additional, Verschuuren, Jan, additional, Harbo, Thomas, additional, and Jacobs, Bart C, additional

Published
2023
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11. Eplontersen for Hereditary Transthyretin Amyloidosis With Polyneuropathy.

Author

Coelho, Teresa, Marques Jr, Wilson, Dasgupta, Noel R., Chao, Chi-Chao, Parman, Yeşim, França Jr, Marcondes Cavalcante, Guo, Yuh-Cherng, Wixner, Jonas, Ro, Long-Sun, Calandra, Cristian R., Kowacs, Pedro A., Berk, John L., Obici, Laura, Barroso, Fabio A., Weiler, Markus, Conceição, Isabel, Jung, Shiangtung W., Buchele, Gustavo, Brambatti, Michela, and Chen, Jersey

Subjects
TRANSTHYRETIN, POLYNEUROPATHIES, CLINICAL trials, AMYLOIDOSIS, CARDIAC amyloidosis, ARRHYTHMIA, CEREBRAL hemorrhage
Abstract

Key Points: Question: Is the antisense oligonucleotide eplontersen associated with changes in serum transthyretin concentration and improvement in neuropathy symptoms among adults with hereditary transthyretin (ATTRv) amyloidosis with polyneuropathy? Findings: In this open-label study that enrolled 168 patients (144 assigned to subcutaneous eplontersen) and included 60 historical placebo patients, the eplontersen treatment group demonstrated changes from baseline to week 65/66 consistent with significantly lower serum transthyretin concentration (−81.7% vs −11.2%), less neuropathy impairment, and better quality of life compared with the historical placebo group. Meaning: Among adults with ATTRv polyneuropathy, the eplontersen treatment group had lower serum transthyretin concentration, less neuropathy impairment, and better quality of life compared with a historical placebo. Importance: Transthyretin gene silencing is an emerging treatment strategy for hereditary transthyretin (ATTRv) amyloidosis. Objective: To evaluate eplontersen, an investigational ligand-conjugated antisense oligonucleotide, in ATTRv polyneuropathy. Design, Setting, and Participants: NEURO-TTRansform was an open-label, single-group, phase 3 trial conducted at 40 sites across 15 countries (December 2019-April 2023) in 168 adults with Coutinho stage 1 or 2 ATTRv polyneuropathy, Neuropathy Impairment Score 10-130, and a documented TTR variant. Patients treated with placebo from NEURO-TTR (NCT01737398; March 2013–November 2017), an inotersen trial with similar eligibility criteria and end points, served as a historical placebo ("placebo") group. Interventions: Subcutaneous eplontersen (45 mg every 4 weeks; n = 144); a small reference group received subcutaneous inotersen (300 mg weekly; n = 24); subcutaneous placebo weekly (in NEURO-TTR; n = 60). Main Outcomes and Measures: Primary efficacy end points at week 65/66 were changes from baseline in serum transthyretin concentration, modified Neuropathy Impairment Score +7 (mNIS+7) composite score (scoring range, –22.3 to 346.3; higher scores indicate poorer function), and Norfolk Quality of Life Questionnaire–Diabetic Neuropathy (Norfolk QoL-DN) total score (scoring range, –4 to 136; higher scores indicate poorer quality of life). Analyses of efficacy end points were based on a mixed-effects model with repeated measures adjusted by propensity score weights. Results: Among 144 eplontersen-treated patients (mean age, 53.0 years; 69% male), 136 (94.4%) completed week-66 follow-up; among 60 placebo patients (mean age, 59.5 years; 68% male), 52 (86.7%) completed week-66 follow-up. At week 65, adjusted mean percentage reduction in serum transthyretin was −81.7% with eplontersen and −11.2% with placebo (difference, −70.4% [95% CI, −75.2% to −65.7%]; P <.001). Adjusted mean change from baseline to week 66 was lower (better) with eplontersen vs placebo for mNIS+7 composite score (0.3 vs 25.1; difference, −24.8 [95% CI, −31.0 to −18.6; P <.001) and for Norfolk QoL-DN (−5.5 vs 14.2; difference, −19.7 [95% CI, −25.6 to −13.8]; P <.001). Adverse events by week 66 that led to study drug discontinuation occurred in 6 patients (4%) in the eplontersen group vs 2 (3%) in the placebo group. Through week 66, there were 2 deaths in the eplontersen group consistent with known disease-related sequelae (cardiac arrhythmia; intracerebral hemorrhage); there were no deaths in the placebo group. Conclusions and Relevance: In patients with ATTRv polyneuropathy, the eplontersen treatment group demonstrated changes consistent with significantly lowered serum transthyretin concentration, less neuropathy impairment, and better quality of life compared with a historical placebo. Trial Registration: ClinicalTrials.gov Identifier: NCT04136184; EU Clinical Trials Register: EudraCT 2019-001698-10 This open-label, single-group, phase 3 trial evaluates eplontersen, an investigational ligand-conjugated antisense oligonucleotide, in adults with hereditary amyloid transthyretin (ATTRv) polyneuropathy at 40 sites in 15 countries, compared with historical controls. [ABSTRACT FROM AUTHOR]

Published
2023
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12. Characteristics of Patients with Hereditary Transthyretin Amyloidosis-Polyneuropathy (ATTRv-PN) in NEURO-TTRansform, an Open-label Phase 3 Study of Eplontersen

Author

Coelho, Teresa, primary, Waddington Cruz, Márcia, additional, Chao, Chi-Chao, additional, Parman, Yeşim, additional, Wixner, Jonas, additional, Weiler, Markus, additional, Barroso, Fabio A., additional, Dasgupta, Noel R., additional, Jung, Shiangtung W., additional, Schneider, Eugene, additional, Viney, Nicholas J., additional, Dyck, P. James B., additional, Ando, Yukio, additional, Gillmore, Julian D., additional, Khella, Sami, additional, Gertz, Morie A., additional, Obici, Laura, additional, and Berk, John L., additional

Published
2022
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17. Characteristics of patients with autonomic dysfunction in the Transthyretin Amyloidosis Outcomes Survey (THAOS)

Author

Barroso, Fabio A., Coelho, Teresa, Dispenzieri, Angela, Conceição, Isabel, Waddington-Cruz, Marcia, Wixner, Jonas, Maurer, Mathew S., Rapezzi, Claudio, Planté-Bordeneuve, Violaine, Kristen, Arnt V., González-Duarte, Alejandra, Chapman, Doug, Stewart, Michelle, Amass, Leslie, Barroso, Fabio A., Coelho, Teresa, Dispenzieri, Angela, Conceição, Isabel, Waddington-Cruz, Marcia, Wixner, Jonas, Maurer, Mathew S., Rapezzi, Claudio, Planté-Bordeneuve, Violaine, Kristen, Arnt V., González-Duarte, Alejandra, Chapman, Doug, Stewart, Michelle, and Amass, Leslie

Abstract

Background: Autonomic dysfunction is common in transthyretin amyloidosis (ATTR amyloidosis), but its frequency, characteristics, and quality-of-life (QoL) impact are not well understood. Methods: The Transthyretin Amyloidosis Outcomes Survey (THAOS) is an ongoing, global, longitudinal survey of patients with ATTR amyloidosis, including patients with inherited (ATTRv) and wild-type (ATTRwt) disease and asymptomatic patients with TTR mutations (ClinicalTrials.gov: NCT00628745). In a descriptive analysis, characteristics and Norfolk QoL-DN total (TQoL) scores at enrolment were compared in patients with vs without autonomic dysfunction (analysis cut-off: 1 August 2020). Results: Autonomic dysfunction occurred in 1181/2922 (40.4%) symptomatic patients, and more commonly in ATTRv (1107/1181 [93.7%]) than ATTRwt (74/1181 [6.3%]) amyloidosis. Time (mean [SD]) from ATTR amyloidosis symptom onset to first autonomic dysfunction symptom was shorter in ATTRv (3.4 [5.7] years) than ATTRwt disease (9.7 [10.4]). In ATTRv disease, patients with vs without autonomic dysfunction had worse QoL (TQoL, 47.3 [33.2] vs 16.1 [18.1]); in ATTRwt disease, those with vs without autonomic dysfunction had similar QoL (23.0 [18.2] vs 19.9 [20.5]). Conclusions: Autonomic dysfunction was more common and presented earlier in symptomatic ATTRv than ATTRwt amyloidosis and adversely affected QoL in ATTRv disease. These THAOS findings may aid clinicians in diagnosing and treating patients with ATTR amyloidosis. Trial registration: ClinicalTrials.gov: NCT00628745.

Published
2022
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18. Electrodiagnosis of Guillain-Barre syndrome in the International GBS Outcome Study: Differences in methods and reference values.

Author

UCL - (SLuc) Centre de référence neuromusculaire, UCL - (SLuc) Service de neurologie, Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D M, Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C, Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H, Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M, Fulgenzi, Ernesto A, Galassi, Giuliana, Gutiérrez Gutiérrez, Gerardo, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C, Manganelli, Fiore, Marfia, Girolama A, Mataluni, Giorgia, Pardo, Julio, Péréon, Yann, Rajabally, Yusuf A, Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C, Cornblath, David R, IGOS consortium, UCL - (SLuc) Centre de référence neuromusculaire, UCL - (SLuc) Service de neurologie, Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D M, Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C, Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H, Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M, Fulgenzi, Ernesto A, Galassi, Giuliana, Gutiérrez Gutiérrez, Gerardo, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C, Manganelli, Fiore, Marfia, Girolama A, Mataluni, Giorgia, Pardo, Julio, Péréon, Yann, Rajabally, Yusuf A, Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C, Cornblath, David R, and IGOS consortium

Abstract

To describe the heterogeneity of electrodiagnostic (EDx) studies in Guillain-Barré syndrome (GBS) patients collected as part of the International GBS Outcome Study (IGOS). Prospectively collected clinical and EDx data were available in 957 IGOS patients from 115 centers. Only the first EDx study was included in the current analysis. Median timing of the EDx study was 7 days (interquartile range 4-11) from symptom onset. Methodology varied between centers, countries and regions. Reference values from the responding 103 centers were derived locally in 49%, from publications in 37% and from a combination of these in the remaining 15%. Amplitude measurement in the EDx studies (baseline-to-peak or peak-to-peak) differed from the way this was done in the reference values, in 22% of motor and 39% of sensory conduction. There was marked variability in both motor and sensory reference values, although only a few outliers accounted for this. Our study showed extensive variation in the clinical practice of EDx in GBS patients among IGOS centers across the regions. Besides EDx variation in GBS patients participating in IGOS, this diversity is likely to be present in other neuromuscular disorders and centers. This underlines the need for standardization of EDx in future multinational GBS studies.

Published
2022

19. Clinical and genetic profile of patients enrolled in the Transthyretin Amyloidosis Outcomes Survey (THAOS) : 14-year update

Author

Dispenzieri, Angela, Coelho, Teresa, Conceição, Isabel, Waddington-Cruz, Márcia, Wixner, Jonas, Kristen, Arnt V., Rapezzi, Claudio, Planté-Bordeneuve, Violaine, Gonzalez-Moreno, Juan, Maurer, Mathew S., Grogan, Martha, Chapman, Doug, Amass, Leslie, Pavia, Pablo Garcia, Tarnev, Ivaylo, Costello, Jose Gonzalez, Briseno, Maria Alejandra Gonzalez Duarte, Schmidt, Hartmut, Drachman, Brian, Barroso, Fabio Adrian, Yamashita, Taro, Lairez, Olivier, Sekijima, Yoshiki, Vita, Giuseppe, Jeon, Eun-Seok, Hanna, Mazen, Slosky, David, Luigetti, Marco, LoRusso, Samantha, Beamud, Francisco Munoz, Adams, David, Moelgaard, Henning, Press, Rayomand, Cirami, Calogero Lino, Nienhuis, Hans, Plana, Josep Maria Campistol, Inamo, Jocelyn, Jacoby, Daniel, Emdin, Michele, Quan, Dianna, Hummel, Scott, Witteles, Ronald, Dori, Amir, Shah, Sanjiv, Lenihan, Daniel, Azevedo, Olga, Murali, Srinivas, Zivkovic, Sasa, Low, Soon Chai, Nativi-Nicolau, Jose, Fine, Nowell, Tallaj, Jose, Tschoepe, Carsten, Torrón, Roberto Fernandéz, Polydefkis, Michael, Merlini, Giampaolo, Badelita, Sorina, Gottlieb, Stephen, Tauras, James, Correia, Edileide Barros, Ventura, Hector, Gess, Burkhard, Darstein, Felix, Oh, Jeeyoung, Marburger, Tessa, Van Cleemput, Johan, Salutto, Valeria Lujan, Parman, Yesim, Chao, Chi-Chao, Sarswat, Nitasha, Mueller, Christopher, Steidley, David, Ralph, Jeffrey, Warner, Alberta, Cotts, William, Hoffman, James, Rugiero, Marcelo, Misawa, Sonoko, Blanco, Jose Luis Munoz, Davila, Lucia Galan, Sadeh, Menachem, Luo, Jin, Kyriakides, Theodoros, Wang, Annabel, Kaufmann, Horacio, Dispenzieri, Angela, Coelho, Teresa, Conceição, Isabel, Waddington-Cruz, Márcia, Wixner, Jonas, Kristen, Arnt V., Rapezzi, Claudio, Planté-Bordeneuve, Violaine, Gonzalez-Moreno, Juan, Maurer, Mathew S., Grogan, Martha, Chapman, Doug, Amass, Leslie, Pavia, Pablo Garcia, Tarnev, Ivaylo, Costello, Jose Gonzalez, Briseno, Maria Alejandra Gonzalez Duarte, Schmidt, Hartmut, Drachman, Brian, Barroso, Fabio Adrian, Yamashita, Taro, Lairez, Olivier, Sekijima, Yoshiki, Vita, Giuseppe, Jeon, Eun-Seok, Hanna, Mazen, Slosky, David, Luigetti, Marco, LoRusso, Samantha, Beamud, Francisco Munoz, Adams, David, Moelgaard, Henning, Press, Rayomand, Cirami, Calogero Lino, Nienhuis, Hans, Plana, Josep Maria Campistol, Inamo, Jocelyn, Jacoby, Daniel, Emdin, Michele, Quan, Dianna, Hummel, Scott, Witteles, Ronald, Dori, Amir, Shah, Sanjiv, Lenihan, Daniel, Azevedo, Olga, Murali, Srinivas, Zivkovic, Sasa, Low, Soon Chai, Nativi-Nicolau, Jose, Fine, Nowell, Tallaj, Jose, Tschoepe, Carsten, Torrón, Roberto Fernandéz, Polydefkis, Michael, Merlini, Giampaolo, Badelita, Sorina, Gottlieb, Stephen, Tauras, James, Correia, Edileide Barros, Ventura, Hector, Gess, Burkhard, Darstein, Felix, Oh, Jeeyoung, Marburger, Tessa, Van Cleemput, Johan, Salutto, Valeria Lujan, Parman, Yesim, Chao, Chi-Chao, Sarswat, Nitasha, Mueller, Christopher, Steidley, David, Ralph, Jeffrey, Warner, Alberta, Cotts, William, Hoffman, James, Rugiero, Marcelo, Misawa, Sonoko, Blanco, Jose Luis Munoz, Davila, Lucia Galan, Sadeh, Menachem, Luo, Jin, Kyriakides, Theodoros, Wang, Annabel, and Kaufmann, Horacio

Abstract

Background: Transthyretin amyloidosis (ATTR amyloidosis) is a rare, life-threatening disease caused by the accumulation of variant or wild-type (ATTRwt amyloidosis) transthyretin amyloid fibrils in the heart, peripheral nerves, and other tissues and organs. Methods: Established in 2007, the Transthyretin Amyloidosis Outcomes Survey (THAOS) is the largest ongoing, global, longitudinal observational study of patients with ATTR amyloidosis, including both inherited and wild-type disease, and asymptomatic carriers of pathogenic TTR mutations. This descriptive analysis examines baseline characteristics of symptomatic patients and asymptomatic gene carriers enrolled in THAOS since its inception in 2007 (data cutoff: August 1, 2021). Results: This analysis included 3779 symptomatic patients and 1830 asymptomatic gene carriers. Symptomatic patients were predominantly male (71.4%) and had a mean (standard deviation [SD]) age of symptom onset of 56.3 (17.8) years. Val30Met was the most common genotype in symptomatic patients in South America (80.9%), Europe (55.4%), and Asia (50.5%), and more patients had early- versus late-onset disease in these regions. The majority of symptomatic patients in North America (58.8%) had ATTRwt amyloidosis. The overall distribution of phenotypes in symptomatic patients was predominantly cardiac (40.7%), predominantly neurologic (40.1%), mixed (16.6%), and no phenotype (2.5%). In asymptomatic gene carriers, mean (SD) age at enrollment was 42.4 (15.7) years, 42.4% were male, and 73.2% carried the Val30Met mutation. Conclusions: This 14-year global overview of THAOS in over 5000 patients represents the largest analysis of ATTR amyloidosis to date and highlights the genotypic and phenotypic heterogeneity of the disease. ClinicalTrials.gov Identifier: NCT00628745.

Published
2022
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20. An International Perspective on Preceding Infections in Guillain-Barre Syndrome The IGOS-1000 Cohort

Author

Leonhard, Sonja E., van der Eijk, Annemiek A., Andersen, Henning, Antonini, Giovanni, Arends, Samuel, Attarian, Shahram, Barroso, Fabio A., Bateman, Kathleen J., Batstra, Manou R., Benedetti, Luana, van den Berg, Bianca, Van den Bergh, Peter, Burmann, Jan, Busby, Mark, Casasnovas, Carlos, Cornblath, David R., Davidson, Amy, Doets, Alex Y., van Doorn, Pieter A., de la Cour, Charlotte Dornonville, Feasby, Thomas E., Fehmi, Janev, Garcia-Sobrino, Tania, Goldstein, Jonathan M., Gorson, Kenneth C., Granit, Volkan, Hadden, Robert D. M., Harbo, Thomas, Hartung, Hans-Peter, Hasan, Imran, Holbech, Jakob, V, Holt, James K. L., Jahan, Israt, Islam, Zhahirul, Karafiath, Summer, Katzberg, Hans D., Kleyweg, Ruud P., Kolb, Noah, Kuitwaard, Krista, Kuwahara, Motoi, Kusunoki, Susumu, Luijten, Linda W. G., Kuwabara, Satoshi, Pan, Edward Lee, Lehmann, Helmar C., Maas, Marijke, Martin-Aguilar, Lorena, Al Miller, James, Mohammad, Quazi Deen, Monges, Soledad, Nedkova-Hristova, Velina, Nobile-Orazio, Eduardo, Pardo, Julio, Pereon, Yann, Querol, Luis, Reisin, Ricardo, Van Rijs, Wouter, Rinaldi, Simon, Roberts, Rhys C., Roodbol, Joyce, Shahrizaila, Nortina, Sindrup, Soren Hein, Stein, Beth, Cheng-Yin, Tan, Tankisi, Hatice, Tio-Gillen, Anne P., Tous, Maria J. Sedano, Verboon, Christine, Vermeij, Frederique H., Visser, Leo H., Huizinga, Ruth, Willison, Hugh J., Jacobs, Bart C., Leonhard, Sonja E., van der Eijk, Annemiek A., Andersen, Henning, Antonini, Giovanni, Arends, Samuel, Attarian, Shahram, Barroso, Fabio A., Bateman, Kathleen J., Batstra, Manou R., Benedetti, Luana, van den Berg, Bianca, Van den Bergh, Peter, Burmann, Jan, Busby, Mark, Casasnovas, Carlos, Cornblath, David R., Davidson, Amy, Doets, Alex Y., van Doorn, Pieter A., de la Cour, Charlotte Dornonville, Feasby, Thomas E., Fehmi, Janev, Garcia-Sobrino, Tania, Goldstein, Jonathan M., Gorson, Kenneth C., Granit, Volkan, Hadden, Robert D. M., Harbo, Thomas, Hartung, Hans-Peter, Hasan, Imran, Holbech, Jakob, V, Holt, James K. L., Jahan, Israt, Islam, Zhahirul, Karafiath, Summer, Katzberg, Hans D., Kleyweg, Ruud P., Kolb, Noah, Kuitwaard, Krista, Kuwahara, Motoi, Kusunoki, Susumu, Luijten, Linda W. G., Kuwabara, Satoshi, Pan, Edward Lee, Lehmann, Helmar C., Maas, Marijke, Martin-Aguilar, Lorena, Al Miller, James, Mohammad, Quazi Deen, Monges, Soledad, Nedkova-Hristova, Velina, Nobile-Orazio, Eduardo, Pardo, Julio, Pereon, Yann, Querol, Luis, Reisin, Ricardo, Van Rijs, Wouter, Rinaldi, Simon, Roberts, Rhys C., Roodbol, Joyce, Shahrizaila, Nortina, Sindrup, Soren Hein, Stein, Beth, Cheng-Yin, Tan, Tankisi, Hatice, Tio-Gillen, Anne P., Tous, Maria J. Sedano, Verboon, Christine, Vermeij, Frederique H., Visser, Leo H., Huizinga, Ruth, Willison, Hugh J., and Jacobs, Bart C.

Abstract

Background and Objectives Infections play a key role in the development of Guillain-Barre syndrome (GBS) and have been associated with specific clinical features and disease severity. The clinical variation of GBS across geographical regions has been suggested to be related to differences in the distribution of preceding infections, but this has not been studied on a large scale. Methods We analyzed the first 1,000 patients included in the International GBS Outcome Study with available biosamples (n = 768) for the presence of a recent infection with Campylobacter jejuni, hepatitis E virus, Mycoplasma pneumoniae, cytomegalovirus, and Epstein-Barr virus. Results Serologic evidence of a recent infection with C. jejuni was found in 228 (30%), M. pneumoniae in 77 (10%), hepatitis E virus in 23 (3%), cytomegalovirus in 30 (4%), and Epstein-Barr virus in 7 (1%) patients. Evidence of more than 1 recent infection was found in 49 (6%) of these patients. Symptoms of antecedent infections were reported in 556 patients (72%), and this proportion did not significantly differ between those testing positive or negative for a recent infection. The proportions of infections were similar across continents. The sensorimotor variant and the demyelinating electrophysiologic subtype were most frequent across all infection groups, although proportions were significantly higher in patients with a cytomegalovirus and significantly lower in those with a C. jejuni infection. C. jejuni-positive patients were more severely affected, indicated by a lower Medical Research Council sum score at nadir (p = 0.004) and a longer time to regain the ability to walk independently (p = 0.005). The pure motor variant and axonal electrophysiologic subtype were more frequent in Asian compared with American or European C. jejuni-positive patients (p < 0.001, resp. p = 0.001). Time to nadir was longer in the cytomegalovirus-positive patients (p = 0.004). Discussion Across geographical regions, the distribution o

Published
2022

21. Predicting Outcome in Guillain-Barre Syndrome International Validation of the Modified Erasmus GBS Outcome Score

Author

Doets, Alex Y., Lingsma, Hester F., Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Kusunoki, Susumu, Dimachkie, Mazen M., Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H., Chavada, Govindsinh, Willison, Hugh J., Casasnovas, Carlos, Bateman, Kathleen, Miller, James A. L., van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E., Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A., Shahrizaila, Nortina, Galassi, Giuliana, Pereon, Yann, Burmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P., Marchesoni, Cintia, Tous, Maria J. Sedano, Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H., Lehmann, Helmar C., Granit, Volkan, Cavaletti, Guido, Gutierrez-Gutierrez, Gerardo, Barroso, Fabio A., Visser, Leo H., Katzberg, Hans D., Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J., Eftimov, Filip, Wirtz, Paul W., Samijn, Johnny P. A., Gilhuis, H. Jacobus, Hadden, Robert D. M., Holt, James K. L., Sheikh, Kazim A., Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E., Faber, Catharina G., Gijsbers, Cees J., Busby, Mark, Roberts, Rhys C., Silvestri, Nicholas J., Fazio, Raffaella, van Dijk, Gert W., Garssen, Marcel P. J., Straathof, Chiara S. M., Gorson, Kenneth C., Jacobs, Bart C., Doets, Alex Y., Lingsma, Hester F., Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Kusunoki, Susumu, Dimachkie, Mazen M., Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H., Chavada, Govindsinh, Willison, Hugh J., Casasnovas, Carlos, Bateman, Kathleen, Miller, James A. L., van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E., Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A., Shahrizaila, Nortina, Galassi, Giuliana, Pereon, Yann, Burmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P., Marchesoni, Cintia, Tous, Maria J. Sedano, Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H., Lehmann, Helmar C., Granit, Volkan, Cavaletti, Guido, Gutierrez-Gutierrez, Gerardo, Barroso, Fabio A., Visser, Leo H., Katzberg, Hans D., Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J., Eftimov, Filip, Wirtz, Paul W., Samijn, Johnny P. A., Gilhuis, H. Jacobus, Hadden, Robert D. M., Holt, James K. L., Sheikh, Kazim A., Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E., Faber, Catharina G., Gijsbers, Cees J., Busby, Mark, Roberts, Rhys C., Silvestri, Nicholas J., Fazio, Raffaella, van Dijk, Gert W., Garssen, Marcel P. J., Straathof, Chiara S. M., Gorson, Kenneth C., and Jacobs, Bart C.

Abstract

Background and Objectives The clinical course and outcome of the Guillain-Barre syndrome (GBS) are diverse and vary among regions. The modified Erasmus GBS Outcome Score (mEGOS), developed with data from Dutch patients, is a clinical model that predicts the risk of walking inability in patients with GBS. The study objective was to validate the mEGOS in the International GBS Outcome Study (IGOS) cohort and to improve its performance and region specificity. Methods We used prospective data from the first 1,500 patients included in IGOS, aged >= 6 years and unable to walk independently. We evaluated whether the mEGOS at entry and week 1 could predict the inability to walk unaided at 4 and 26 weeks in the full cohort and in regional subgroups, using 2 measures for model performance: (1) discrimination: area under the receiver operating characteristic curve (AUC) and (2) calibration: observed vs predicted probability of being unable to walk independently. To improve the model predictions, we recalibrated the model containing the overall mEGOS score, without changing the individual predictive factors. Finally, we assessed the predictive ability of the individual factors. Results For validation of mEGOS at entry, 809 patients were eligible (Europe/North America [n = 677], Asia [n = 76], other [n = 56]), and 671 for validation of mEGOS at week 1 (Europe/North America [n = 563], Asia [n = 65], other [n = 43]). AUC values were >0.7 in all regional subgroups. In the Europe/North America subgroup, observed outcomes were worse than predicted; in Asia, observed outcomes were better than predicted. Recalibration improved model accuracy and enabled the development of a region-specific version for Europe/North America (mEGOS-Eu/NA). Similar to the original mEGOS, severe limb weakness and higher age were the predominant predictors of poor outcome in the IGOS cohort. Discussion mEGOS is a validated tool to predict the inability to walk unaided at 4 and 26 weeks in patients with GBS, a

Published
2022

22. Electrodiagnosis of Guillain-Barre syndrome in the International GBS Outcome Study: Differences in methods and reference values

Author

Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D. M., Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C., Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H., Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M., Fulgenzi, Ernesto A., Galassi, Giuliana, Gutierrez, Gerardo Gutierrez, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C., Manganelli, Fiore, Marfia, Girolama A., Mataluni, Giorgia, Pardo, Julio, Pereon, Yann, Rajabally, Yusuf A., Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C., Cornblath, David R., Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D. M., Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C., Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H., Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M., Fulgenzi, Ernesto A., Galassi, Giuliana, Gutierrez, Gerardo Gutierrez, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C., Manganelli, Fiore, Marfia, Girolama A., Mataluni, Giorgia, Pardo, Julio, Pereon, Yann, Rajabally, Yusuf A., Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C., and Cornblath, David R.

Abstract

Objective: To describe the heterogeneity of electrodiagnostic (EDx) studies in Guillain-Barre syndrome (GBS) patients collected as part of the International GBS Outcome Study (IGOS).Methods: Prospectively collected clinical and EDx data were available in 957 IGOS patients from 115 centers. Only the first EDx study was included in the current analysis.Results: Median timing of the EDx study was 7 days (interquartile range 4-11) from symptom onset. Methodology varied between centers, countries and regions. Reference values from the responding 103 centers were derived locally in 49%, from publications in 37% and from a combination of these in the remaining 15%. Amplitude measurement in the EDx studies (baseline-to-peak or peak-to-peak) differed from the way this was done in the reference values, in 22% of motor and 39% of sensory conduction. There was marked variability in both motor and sensory reference values, although only a few outliers accounted for this.Conclusions: Our study showed extensive variation in the clinical practice of EDx in GBS patients among IGOS centers across the regions. Significance: Besides EDx variation in GBS patients participating in IGOS, this diversity is likely to be present in other neuromuscular disorders and centers. This underlines the need for standardization of EDx in future multinational GBS studies.(c) 2022 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Published
2022

23. Electrodiagnosis of Guillain-Barre syndrome in the International GBS Outcome Study:Differences in methods and reference values

Author

Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D M, Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C, Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H, Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M, Fulgenzi, Ernesto A, Galassi, Giuliana, Gutiérrez Gutiérrez, Gerardo, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C, Manganelli, Fiore, Marfia, Girolama A, Mataluni, Giorgia, Pardo, Julio, Péréon, Yann, Rajabally, Yusuf A, Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C, Cornblath, David R, Arends, Samuel, Drenthen, Judith, van den Bergh, Peter, Franssen, Hessel, Hadden, Robert D M, Islam, Badrul, Kuwabara, Satoshi, Reisin, Ricardo C, Shahrizaila, Nortina, Amino, Hiroshi, Antonini, Giovanni, Attarian, Shahram, Balducci, Claudia, Barroso, Fabio, Bertorini, Tulio, Binda, Davide, Brannagan, Thomas H, Buermann, Jan, Casasnovas, Carlos, Cavaletti, Guido, Chao, Chi-Chao, Dimachkie, Mazen M, Fulgenzi, Ernesto A, Galassi, Giuliana, Gutiérrez Gutiérrez, Gerardo, Harbo, Thomas, Hartung, Hans-Peter, Hsieh, Sung-Tsang, Kiers, Lynette, Lehmann, Helmar C, Manganelli, Fiore, Marfia, Girolama A, Mataluni, Giorgia, Pardo, Julio, Péréon, Yann, Rajabally, Yusuf A, Santoro, Lucio, Sekiguchi, Yukari, Stein, Beth, Stettner, Mark, Uncini, Antonino, Verboon, Christine, Verhamme, Camiel, Vytopil, Michal, Waheed, Waqar, Wang, Min, Zivkovic, Sasha, Jacobs, Bart C, and Cornblath, David R

Abstract

OBJECTIVE: To describe the heterogeneity of electrodiagnostic (EDx) studies in Guillain-Barré syndrome (GBS) patients collected as part of the International GBS Outcome Study (IGOS).METHODS: Prospectively collected clinical and EDx data were available in 957 IGOS patients from 115 centers. Only the first EDx study was included in the current analysis.RESULTS: Median timing of the EDx study was 7 days (interquartile range 4-11) from symptom onset. Methodology varied between centers, countries and regions. Reference values from the responding 103 centers were derived locally in 49%, from publications in 37% and from a combination of these in the remaining 15%. Amplitude measurement in the EDx studies (baseline-to-peak or peak-to-peak) differed from the way this was done in the reference values, in 22% of motor and 39% of sensory conduction. There was marked variability in both motor and sensory reference values, although only a few outliers accounted for this.CONCLUSIONS: Our study showed extensive variation in the clinical practice of EDx in GBS patients among IGOS centers across the regions.SIGNIFICANCE: Besides EDx variation in GBS patients participating in IGOS, this diversity is likely to be present in other neuromuscular disorders and centers. This underlines the need for standardization of EDx in future multinational GBS studies.

Published
2022

24. Predicting Outcome in Guillain-Barré Syndrome: International Validation of the Modified Erasmus GBS Outcome Score

Author

Doets, A, Lingsma, H, Walgaard, C, Islam, B, Papri, N, Davidson, A, Yamagishi, Y, Kusunoki, S, Dimachkie, M, Waheed, W, Kolb, N, Islam, Z, Mohammad, Q, Harbo, T, Sindrup, S, Chavada, G, Willison, H, Casasnovas, C, Bateman, K, Miller, J, van den Berg, B, Verboon, C, Roodbol, J, Leonhard, S, Benedetti, L, Kuwabara, S, Van den Bergh, P, Monges, S, Marfia, G, Shahrizaila, N, Galassi, G, Péréon, Y, Bürmann, J, Kuitwaard, K, Kleyweg, R, Marchesoni, C, Sedano Tous, M, Querol, L, Illa, I, Wang, Y, Nobile-Orazio, E, Rinaldi, S, Schenone, A, Pardo, J, Vermeij, F, Lehmann, H, Granit, V, Cavaletti, G, Gutiérrez-Gutiérrez, G, Barroso, F, Visser, L, Katzberg, H, Dardiotis, E, Attarian, S, van der Kooi, A, Eftimov, F, Wirtz, P, Samijn, J, Gilhuis, H, Hadden, R, Holt, J, Sheikh, K, Karafiath, S, Vytopil, M, Antonini, G, Feasby, T, Faber, C, Gijsbers, C, Busby, M, Roberts, R, Silvestri, N, Fazio, R, van Dijk, G, Garssen, M, Straathof, C, Gorson, K, Jacobs, B, Doets, Alex Y, Lingsma, Hester F, Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Yamagishi, Yuko, Kusunoki, Susumu, Dimachkie, Mazen M, Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H, Chavada, Govindsinh, Willison, Hugh J, Casasnovas, Carlos, Bateman, Kathleen, Miller, James A L, van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E, Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A, Shahrizaila, Nortina, Galassi, Giuliana, Péréon, Yann, Bürmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P, Marchesoni, Cintia, Sedano Tous, María J, Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H, Lehmann, Helmar C, Granit, Volkan, Cavaletti, Guido, Gutiérrez-Gutiérrez, Gerardo, Barroso, Fabio A, Visser, Leo H, Katzberg, Hans D, Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J, Eftimov, Filip, Wirtz, Paul W, Samijn, Johnny P A, Gilhuis, H Jacobus, Hadden, Robert D M, Holt, James K L, Sheikh, Kazim A, Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E, Faber, Catharina G, Gijsbers, Cees J, Busby, Mark, Roberts, Rhys C, Silvestri, Nicholas J, Fazio, Raffaella, van Dijk, Gert W, Garssen, Marcel P J, Straathof, Chiara S M, Gorson, Kenneth C, Jacobs, Bart C, Doets, A, Lingsma, H, Walgaard, C, Islam, B, Papri, N, Davidson, A, Yamagishi, Y, Kusunoki, S, Dimachkie, M, Waheed, W, Kolb, N, Islam, Z, Mohammad, Q, Harbo, T, Sindrup, S, Chavada, G, Willison, H, Casasnovas, C, Bateman, K, Miller, J, van den Berg, B, Verboon, C, Roodbol, J, Leonhard, S, Benedetti, L, Kuwabara, S, Van den Bergh, P, Monges, S, Marfia, G, Shahrizaila, N, Galassi, G, Péréon, Y, Bürmann, J, Kuitwaard, K, Kleyweg, R, Marchesoni, C, Sedano Tous, M, Querol, L, Illa, I, Wang, Y, Nobile-Orazio, E, Rinaldi, S, Schenone, A, Pardo, J, Vermeij, F, Lehmann, H, Granit, V, Cavaletti, G, Gutiérrez-Gutiérrez, G, Barroso, F, Visser, L, Katzberg, H, Dardiotis, E, Attarian, S, van der Kooi, A, Eftimov, F, Wirtz, P, Samijn, J, Gilhuis, H, Hadden, R, Holt, J, Sheikh, K, Karafiath, S, Vytopil, M, Antonini, G, Feasby, T, Faber, C, Gijsbers, C, Busby, M, Roberts, R, Silvestri, N, Fazio, R, van Dijk, G, Garssen, M, Straathof, C, Gorson, K, Jacobs, B, Doets, Alex Y, Lingsma, Hester F, Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Yamagishi, Yuko, Kusunoki, Susumu, Dimachkie, Mazen M, Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H, Chavada, Govindsinh, Willison, Hugh J, Casasnovas, Carlos, Bateman, Kathleen, Miller, James A L, van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E, Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A, Shahrizaila, Nortina, Galassi, Giuliana, Péréon, Yann, Bürmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P, Marchesoni, Cintia, Sedano Tous, María J, Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H, Lehmann, Helmar C, Granit, Volkan, Cavaletti, Guido, Gutiérrez-Gutiérrez, Gerardo, Barroso, Fabio A, Visser, Leo H, Katzberg, Hans D, Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J, Eftimov, Filip, Wirtz, Paul W, Samijn, Johnny P A, Gilhuis, H Jacobus, Hadden, Robert D M, Holt, James K L, Sheikh, Kazim A, Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E, Faber, Catharina G, Gijsbers, Cees J, Busby, Mark, Roberts, Rhys C, Silvestri, Nicholas J, Fazio, Raffaella, van Dijk, Gert W, Garssen, Marcel P J, Straathof, Chiara S M, Gorson, Kenneth C, and Jacobs, Bart C

Abstract

Background and objectives: The clinical course and outcome of the Guillain-Barré syndrome (GBS) are diverse and vary among regions. The modified Erasmus GBS Outcome Score (mEGOS), developed with data from Dutch patients, is a clinical model that predicts the risk of walking inability in patients with GBS. The study objective was to validate the mEGOS in the International GBS Outcome Study (IGOS) cohort and to improve its performance and region specificity. Methods: We used prospective data from the first 1,500 patients included in IGOS, aged ≥6 years and unable to walk independently. We evaluated whether the mEGOS at entry and week 1 could predict the inability to walk unaided at 4 and 26 weeks in the full cohort and in regional subgroups, using 2 measures for model performance: (1) discrimination: area under the receiver operating characteristic curve (AUC) and (2) calibration: observed vs predicted probability of being unable to walk independently. To improve the model predictions, we recalibrated the model containing the overall mEGOS score, without changing the individual predictive factors. Finally, we assessed the predictive ability of the individual factors. Results: For validation of mEGOS at entry, 809 patients were eligible (Europe/North America [n = 677], Asia [n = 76], other [n = 56]), and 671 for validation of mEGOS at week 1 (Europe/North America [n = 563], Asia [n = 65], other [n = 43]). AUC values were >0.7 in all regional subgroups. In the Europe/North America subgroup, observed outcomes were worse than predicted; in Asia, observed outcomes were better than predicted. Recalibration improved model accuracy and enabled the development of a region-specific version for Europe/North America (mEGOS-Eu/NA). Similar to the original mEGOS, severe limb weakness and higher age were the predominant predictors of poor outcome in the IGOS cohort. Discussion: mEGOS is a validated tool to predict the inability to walk unaided at 4 and 26 weeks in patients with

Published
2022

25. Neuralgic amyotrophy detected by magnetic resonance neurography: subclinical, bilateral, and multifocal brachial plexus involvement.

Author

Cejas, Claudia, Pastor Rueda, José M., Hernández Pinzón, Jairo, Stefanoff, Nadia, and Barroso, Fabio

Subjects
MAGNETIC resonance neurography, BRACHIAL plexus neuropathies, BRACHIAL plexus, PERIPHERAL nervous system, ELECTRONIC health records
Abstract

Neuralgic amyotrophy (NA) is a painful non-traumatic peripheral nervous system condition affecting the brachial plexus. Signal abnormalities in nerves and muscles have been detected in these patients using magnetic resonance neurography (MRN). Electronic medical records and MRN images obtained in a 3 T scanner, in 14 adult patients diagnosed with NA at our Neurological institution (Neuromuscular Disorders Section), between December 2015 and December 2019 were retrospectively reviewed. The study was first approved by our Institutional Ethics Committee. Subclinical, multifocal, and bilateral nerve signal anomalies were recorded in the brachial plexus of these patients. We identified four different types of nerve constriction without entrapment, which we categorized as follows: incomplete focal (type I), complete focal or hourglass (type II), multifocal or string of pearls (type III) and segmental (type IV). Given that MRN is an accurate diagnostic tool to detect nerve damage, we believe abnormal findings could improve early detection of NA patients. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Clinical and genetic profile of patients enrolled in the Transthyretin Amyloidosis Outcomes Survey (THAOS)

Author

Dispenzieri, Angela, Coelho, Teresa, Conceição, Isabel, Waddington-Cruz, Márcia, Wixner, Jonas, Kristen, Arnt V., Rapezzi, Claudio, Planté-Bordeneuve, Violaine, Gonzalez-Moreno, Juan, Maurer, Mathew S., Grogan, Martha, Chapman, Doug, Amass, Leslie, Pavia, Pablo Garcia, Tarnev, Ivaylo, Costello, Jose Gonzalez, Briseno, Maria Alejandra Gonzalez Duarte, Schmidt, Hartmut, Drachman, Brian, Barroso, Fabio Adrian, Yamashita, Taro, Lairez, Olivier, Sekijima, Yoshiki, Vita, Giuseppe, Jeon, Eun-Seok, Hanna, Mazen, Slosky, David, Luigetti, Marco, LoRusso, Samantha, Beamud, Francisco Munoz, Adams, David, Moelgaard, Henning, Press, Rayomand, Cirami, Calogero Lino, Nienhuis, Hans, Plana, Josep Maria Campistol, Inamo, Jocelyn, Jacoby, Daniel, Emdin, Michele, Quan, Dianna, Hummel, Scott, Witteles, Ronald, Dori, Amir, Shah, Sanjiv, Lenihan, Daniel, Azevedo, Olga, Murali, Srinivas, Zivkovic, Sasa, Low, Soon Chai, Nativi-Nicolau, Jose, Fine, Nowell, Tallaj, Jose, Tschoepe, Carsten, Torrón, Roberto Fernandéz, Polydefkis, Michael, Merlini, Giampaolo, Badelita, Sorina, Gottlieb, Stephen, Tauras, James, Correia, Edileide Barros, Ventura, Hector, Gess, Burkhard, Darstein, Felix, Oh, Jeeyoung, Marburger, Tessa, Van Cleemput, Johan, Salutto, Valeria Lujan, Parman, Yesim, Chao, Chi-Chao, Sarswat, Nitasha, Mueller, Christopher, Steidley, David, Ralph, Jeffrey, Warner, Alberta, Cotts, William, Hoffman, James, Rugiero, Marcelo, Misawa, Sonoko, Blanco, Jose Luis Munoz, Davila, Lucia Galan, Sadeh, Menachem, Luo, Jin, Kyriakides, Theodoros, Wang, Annabel, and Kaufmann, Horacio

Subjects
Male, Amyloid Neuropathies, Familial, Registry, Neurologi, Cardiomyopathy, General Medicine, Amyloidosis, Genetic Profile, Amyloid Neuropathies, Transthyretin, Phenotype, Familial, Neurology, Surveys and Questionnaires, Polyneuropathy, Humans, Prealbumin, Pharmacology (medical), Female, Genetics (clinical)
Abstract

Background Transthyretin amyloidosis (ATTR amyloidosis) is a rare, life-threatening disease caused by the accumulation of variant or wild-type (ATTRwt amyloidosis) transthyretin amyloid fibrils in the heart, peripheral nerves, and other tissues and organs. Methods Established in 2007, the Transthyretin Amyloidosis Outcomes Survey (THAOS) is the largest ongoing, global, longitudinal observational study of patients with ATTR amyloidosis, including both inherited and wild-type disease, and asymptomatic carriers of pathogenic TTR mutations. This descriptive analysis examines baseline characteristics of symptomatic patients and asymptomatic gene carriers enrolled in THAOS since its inception in 2007 (data cutoff: August 1, 2021). Results This analysis included 3779 symptomatic patients and 1830 asymptomatic gene carriers. Symptomatic patients were predominantly male (71.4%) and had a mean (standard deviation [SD]) age of symptom onset of 56.3 (17.8) years. Val30Met was the most common genotype in symptomatic patients in South America (80.9%), Europe (55.4%), and Asia (50.5%), and more patients had early- versus late-onset disease in these regions. The majority of symptomatic patients in North America (58.8%) had ATTRwt amyloidosis. The overall distribution of phenotypes in symptomatic patients was predominantly cardiac (40.7%), predominantly neurologic (40.1%), mixed (16.6%), and no phenotype (2.5%). In asymptomatic gene carriers, mean (SD) age at enrollment was 42.4 (15.7) years, 42.4% were male, and 73.2% carried the Val30Met mutation. Conclusions This 14-year global overview of THAOS in over 5000 patients represents the largest analysis of ATTR amyloidosis to date and highlights the genotypic and phenotypic heterogeneity of the disease. ClinicalTrials.gov Identifier: NCT00628745.

Published
2022

28. Utilidad de los anticuerpos en las enfermedades de la unión neuromuscular: revisión

Author

Salutto, Valeria L., primary, Bendersky, Mariana, additional, Aguirre, Florencia, additional, Alvarez, Valeria, additional, Barroso, Fabio, additional, Berardo, Andrés, additional, Bettini, Mariela, additional, Borrelli, Mariano M., additional, Chaves, Marcelo, additional, Cisneros, Elisa M., additional, Conti, Eugenia, additional, Crespo, José M., additional, Di Egidio, Marianna, additional, Dubrovsky, Alberto, additional, Figueredo, María Alejandra, additional, Gargiulo, Gisella, additional, Jáuregui, Agustín, additional, Landriscina, Paula, additional, León Cejas, Luciana, additional, Martínez Perea, María del Carmen, additional, Pirra, Laura, additional, Pivetta, Paola, additional, Quarracino, Cecilia, additional, Rattagan, María Lucía, additional, Rodriguez, Alejandro, additional, Rodriguez, Gabriel E., additional, Rugiero, Marcelo, additional, Tillard, Belen, additional, Zuberhbuler, Paz, additional, Reisin, Ricardo, additional, and Rey, Roberto, additional

Published
2021
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29. Temporal Trends of Wild-Type Transthyretin Amyloid Cardiomyopathy in the Transthyretin Amyloidosis Outcomes Survey

Author

Nativi-Nicolau, Jose, primary, Siu, Alfonso, additional, Dispenzieri, Angela, additional, Maurer, Mathew S., additional, Rapezzi, Claudio, additional, Kristen, Arnt V., additional, Garcia-Pavia, Pablo, additional, LoRusso, Samantha, additional, Waddington-Cruz, Márcia, additional, Lairez, Olivier, additional, Witteles, Ronald, additional, Chapman, Doug, additional, Amass, Leslie, additional, Grogan, Martha, additional, Barroso, Fabio Adrian, additional, Van Cleemput, Johan, additional, Fine, Nowell, additional, Schmidt, Hartmut, additional, Gess, Burkhard, additional, Moelgaard, Henning, additional, Planté-Bordeneuve, Violaine, additional, Adams, David, additional, Inamo, Jocelyn, additional, Vita, Giuseppe, additional, Cirami, Calogero Lino, additional, Luigetti, Marco, additional, Emdin, Michele, additional, Sekijima, Yoshiki, additional, Yamashita, Taro, additional, Jeon, Eun-Seok, additional, Gonzalez Duarte Briseno, Maria Alejandra, additional, Nienhuis, Hans, additional, Azevedo, Olga, additional, Campistol Plana, Josep Maria, additional, Moreno, Juan Gonzalez, additional, Costello, Jose Gonzalez, additional, Wixner, Jonas, additional, Parman, Yesim, additional, Shah, Sanjiv, additional, Quan, Dianna, additional, Marburger, Tessa, additional, Polydefkis, Michael, additional, Gottlieb, Stephen, additional, Ralph, Jeffrey, additional, Sarswat, Nitasha, additional, Luo, Jin, additional, Murali, Srinivas, additional, Cotts, William, additional, Drachman, Brian, additional, Steidley, David, additional, Hummel, Scott, additional, Slosky, David, additional, Ventura, Hector, additional, Jacoby, Daniel, additional, Hoffman, James, additional, Tauras, James, additional, Zivkovic, Sasa, additional, Tallaj, Jose, additional, Lenihan, Daniel, additional, and Mueller, Christopher, additional

Published
2021
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30. An International Perspective on Preceding Infections in Guillain-Barré Syndrome

Author

Leonhard, Sonja E., van der Eijk, Annemiek A., Andersen, Henning, Antonini, Giovanni, Arends, Samuel, Attarian, Shahram, Barroso, Fabio A., Bateman, Kathleen J., Batstra, Manou R., Benedetti, Luana, van den Berg, Bianca, Van den Bergh, Peter, Bürmann, Jan, Busby, Mark, Casasnovas, Carlos, Cornblath, David R., Davidson, Amy, Doets, Alex Y., van Doorn, Pieter A., Dornonville de la Cour, Charlotte, Feasby, Thomas E., Fehmi, Janev, Garcia-Sobrino, Tania, Goldstein, Jonathan M., Gorson, Kenneth C., Granit, Volkan, Hadden, Robert D.M., Harbo, Thomas, Hartung, Hans-Peter, Hasan, Imran, Holbech, Jakob V., Holt, James K.L., Jahan, Israt, Islam, Zhahirul, Karafiath, Summer, Katzberg, Hans D., Kleyweg, Ruud P., Kolb, Noah, Kuitwaard, Krista, Kuwahara, Motoi, Kusunoki, Susumu, Luijten, Linda W.G., Kuwabara, Satoshi, Lee Pan, Edward, Lehmann, Helmar C., Maas, Marijke, Martín-Aguilar, Lorena, Miller, James A.L., Mohammad, Quazi Deen, Monges, Soledad, Nedkova-Hristova, Velina, Nobile-Orazio, Eduardo, Pardo, Julio, Pereon, Yann, Querol, Luis, Reisin, Ricardo, Van Rijs, Wouter, Rinaldi, Simon, Roberts, Rhys C., Roodbol, Joyce, Shahrizaila, Nortina, Sindrup, Søren Hein, Stein, Beth, Cheng-Yin, Tan, Tankisi, Hatice, Tio-Gillen, Anne P., Sedano Tous, María J., Verboon, Christine, Vermeij, Frederique H., Visser, Leo H., Huizinga, Ruth, Willison, Hugh J., and Jacobs, Bart C.

Published
2022
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31. Phenotypic Differences of Glu89Gln Genotype in ATTR Amyloidosis From Endemic Loci: Update From THAOS.

Author

Gentile, Luca, Tournev, Ivailo, Amass, Leslie, Chapman, Doug, Mazzeo, Anna, the THAOS investigators, Barroso, Fabio, van Cleemput, Johan, Schmidt, Hartmut, Gess, Burkhard, Garcia Pavia, Pablo, Blanco, José Luis Muñoz, Rapezzi, Claudio, Vita, Giuseppe, Merlini, Giampaolo, Luigetti, Marco, Parman, Yesim, Maurer, Mathew, and LoRusso, Samantha

Published
2021
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32. Characteristics of Patients with Late- vs. Early-Onset Val30Met Transthyretin Amyloidosis from the Transthyretin Amyloidosis Outcomes Survey (THAOS).

Author

Waddington-Cruz, Márcia, Wixner, Jonas, Amass, Leslie, Kiszko, Jan, Chapman, Doug, Ando, Yukio, the THAOS investigators, Barroso, Fabio Adrian, Rugiero, Marcelo, Van Cleemput, Johan, Tarnev, Ivaylo, Kyriakides, Theodoros, Kristen, Arnt, Schmidt, Hartmut, Darstein, Felix, Gess, Burkhard, Plana, Josep Maria Campistol, Moreno, Juan Gonzalez, Costello, Jose Gonzalez, and Pavia, Pablo Garcia

Published
2021
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33. Eculizumab in refractory generalized myasthenia gravis previously treated with rituximab: subgroup analysis of REGAIN and its extension study.

Author

Siddiqi, Zaeem A., Nowak, Richard J., Mozaffar, Tahseen, O'Brien, Fanny, Yountz, Marcus, Patti, Francesco, Mazia, Claudio Gabriel, Wilken, Miguel, Barroso, Fabio, Saba, Juliet, Rugiero, Marcelo, Bettini, Mariela, Chaves, Marcelo, Vidal, Gonzalo, Garcia, Alejandra Dalila, De Bleecker, Jan, Van den Abeele, Guy, de Koning, Kathy, De Mey, Katrien, and Mercelis, Rudy

Abstract

Introduction/Aims: Individuals with refractory generalized myasthenia gravis (gMG) who have a history of rituximab use and experience persistent symptoms represent a population with unmet treatment needs. The aim of this analysis was to evaluate the efficacy and safety of eculizumab in patients with refractory anti‐acetylcholine receptor antibody‐positive (AChR+) gMG previously treated with rituximab. Methods: This post hoc subgroup analysis of the phase 3 REGAIN study (NCT01997229) and its open‐label extension (OLE; NCT02301624) compared baseline characteristics, safety, and response to eculizumab in participants who had previously received rituximab with those who had not. Rituximab use was not permitted within the 6 months before screening or during REGAIN/OLE. Results: Of 125 REGAIN participants, 14 had received rituximab previously (7 received placebo and 7 received eculizumab). In the previous‐rituximab group, 57% had used at least four other immunosuppressants compared with 16% in the no‐previous‐rituximab group. Myasthenia Gravis Activities of Daily Living total scores from eculizumab baseline to week 130 of eculizumab treatment improved in both the previous‐rituximab and no‐previous‐rituximab groups (least‐squares mean −4.4, standard error of the mean [SEM] 1.0 [n = 9] and least‐squares mean −4.6, SEM 0.3 [n = 67], respectively; difference = 0.2, 95% confidence interval −1.88 to 2.22). In addition, in both groups, most patients who were treated with eculizumab for 130 weeks achieved a Myasthenia Gravis Foundation of America post‐intervention status of minimal manifestations (66.7% and 65.0%, respectively). The eculizumab safety profile was similar between groups and consistent with its established profile. Discussion: Eculizumab is an effective therapy for patients with refractory AChR+ gMG, irrespective of whether they had received rituximab treatment previously. [ABSTRACT FROM AUTHOR]

Published
2021
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34. Intravenous immunoglobulin treatment for mild Guillain-Barré syndrome: an international observational study.

Author

Verboon, Christine, Harbo, Thomas, Cornblath, David R., Hughes, Richard A. C., van Doorn, Pieter A., Lunn, Michael P., Gorson, Kenneth C., Barroso, Fabio, Satoshi Kuwabara, Galassi, Giuliana, Lehmann, Helmar C., Susumu Kusunoki, Reisin, Ricardo C., Binda, Davide, Cavaletti, Guido, Jacobs, Bart C., Kuwabara, Satoshi, Kusunoki, Susumu, IGOS consortium, and GOS consortium

Subjects
GUILLAIN-Barre syndrome, INTRAVENOUS immunoglobulins, CONFIDENCE intervals, SCIENTIFIC observation, MUSCLE strength, THERAPEUTIC use of immunoglobulins, RESEARCH, RESEARCH methodology, DISABILITY evaluation, MEDICAL cooperation, EVALUATION research, TREATMENT effectiveness, COMPARATIVE studies
Abstract

Objective: To compare the disease course in patients with mild Guillain-Barré syndrome (GBS) who were treated with intravenous immunoglobulin (IVIg) or supportive care only.Methods: We selected patients from the prospective observational International GBS Outcome Study (IGOS) who were able to walk independently at study entry (mild GBS), treated with one IVIg course or supportive care. The primary endpoint was the GBS disability score four weeks after study entry, assessed by multivariable ordinal regression analysis.Results: Of 188 eligible patients, 148 (79%) were treated with IVIg and 40 (21%) with supportive care. The IVIg group was more disabled at baseline. IVIg treatment was not associated with lower GBS disability scores at 4 weeks (adjusted OR (aOR) 1.62, 95% CI 0.63 to 4.13). Nearly all secondary endpoints showed no benefit from IVIg, although the time to regain full muscle strength was shorter (28 vs 56 days, p=0.03) and reported pain at 26 weeks was lower (n=26/121, 22% vs n=12/30, 40%, p=0.04) in the IVIg treated patients. In the subanalysis with persistent mild GBS in the first 2 weeks, the aOR for a lower GBS disability score at 4 weeks was 2.32 (95% CI 0.76 to 7.13). At 1 year, 40% of all patients had residual symptoms.Conclusion: In patients with mild GBS, one course of IVIg did not improve the overall disease course. The certainty of this conclusion is limited by confounding factors, selection bias and wide confidence limits. Residual symptoms were often present after one year, indicating the need for better treatments in mild GBS. [ABSTRACT FROM AUTHOR]

Published
2021
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35. Predicting Outcome in Guillain-Barré Syndrome

Author

Doets, Alex Y., Lingsma, Hester F., Walgaard, Christa, Islam, Badrul, Papri, Nowshin, Davidson, Amy, Yamagishi, Yuko, Kusunoki, Susumu, Dimachkie, Mazen M., Waheed, Waqar, Kolb, Noah, Islam, Zhahirul, Mohammad, Quazi Deen, Harbo, Thomas, Sindrup, Soren H., Chavada, Govindsinh, Willison, Hugh J., Casasnovas, Carlos, Bateman, Kathleen, Miller, James A.L., van den Berg, Bianca, Verboon, Christine, Roodbol, Joyce, Leonhard, Sonja E., Benedetti, Luana, Kuwabara, Satoshi, Van den Bergh, Peter, Monges, Soledad, Marfia, Girolama A., Shahrizaila, Nortina, Galassi, Giuliana, Péréon, Yann, Bürmann, Jan, Kuitwaard, Krista, Kleyweg, Ruud P., Marchesoni, Cintia, Sedano Tous, María J., Querol, Luis, Illa, Isabel, Wang, Yuzhong, Nobile-Orazio, Eduardo, Rinaldi, Simon, Schenone, Angelo, Pardo, Julio, Vermeij, Frederique H., Lehmann, Helmar C., Granit, Volkan, Cavaletti, Guido, Gutiérrez-Gutiérrez, Gerardo, Barroso, Fabio A., Visser, Leo H., Katzberg, Hans D., Dardiotis, Efthimios, Attarian, Shahram, van der Kooi, Anneke J., Eftimov, Filip, Wirtz, Paul W., Samijn, Johnny P.A., Gilhuis, H. Jacobus, Hadden, Robert D.M., Holt, James K.L., Sheikh, Kazim A., Karafiath, Summer, Vytopil, Michal, Antonini, Giovanni, Feasby, Thomas E., Faber, Catharina G., Gijsbers, Cees J., Busby, Mark, Roberts, Rhys C., Silvestri, Nicholas J., Fazio, Raffaella, van Dijk, Gert W., Garssen, Marcel P.J., Straathof, Chiara S.M., Gorson, Kenneth C., Jacobs, Bart C., Hughes, R.A.C., Cornblath, D.R., Hartung, H.P., van Doorn, P.A., de Koning, L.C., van Woerkom, M., Mandarakas, M., MPhty, BHIthSci(Hons), Reisin, R.C., Reddel, S.W., Ripellino, P., Hsieh, S.T., Addington, J.M., Ajroud-Driss, S., Andersen, H., Badrising, U.A., Bella, I.R., Bertorini, T.E., Bhavaraju-Sanka, R., Bianco, M., Brannagan, T.H., Briani, Chiara, Butterworth, S., Chao, C.C., Chen, S., Claeys, K.G., Conti, M.E., Cosgrove, J.S., Dalakas, M.C., Dornonville de la Cour, C., Echaniz-Laguna, A., Fehmi, J., Fokke, C., Fujioka, T., Fulgenzi, E.A., García-Sobrino, T., Gilchrist, J.M., Goldstein, J.M., Goyal, N.A., Grisanti, S.G., Gutman, L., Holbech, J.V., Homedes, C., Htut, M., Jellema, K., Pascual, I. Jericó, JimenoMontero, M.C., Kaida, K., Khoshnoodi, M., Kiers, L., Kimpinski, K., Köhler, A.A., Kokubun, N., Kuwahara, M., Kwan, J.Y., Ladha, S.S., Lassen, L. Landschoff, Lawson, V., Pan, E.B. Lee, Cejas, L. Léon, Lunn, M.P.T., Magot, A., Manji, H., Infante, C. Márquez, Martín-Aguilar, L., Hernandez, E. Martinez, Mataluni, G., Mattiazzi, M.G., McDermott, C.J., Meekins, G.D., Morís de la Tassa, G., Nascimbene, C., Nowak, R.J., Osei-Bonsu, M., Pascuzzi, R.M., Prada, V., Rojas-Marcos, I., Rudnicki, S.A., Sachs, G.M., Samukawa, M., Santoro, L., Savransky, A.G., Schwindling, L., Sekiguchi, Y., Sommer, C.L., Spyropoulos, A., Stein, B., Stino, A.M., Tan, C.Y., Tankisi, H., Twydell, P.T., van Damme, P., van der Ree, T., van Koningsveld, R., Varrato, J.D., Xing, C., Zhou, L., and Zivkovic, S.

Published
2022
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36. CSF Findings in Relation to Clinical Characteristics, Subtype, and Disease Course in Patients With Guillain-Barré Syndrome.

Author

Al-Hakem H, Doets AY, Stino AM, Zivkovic SA, Andersen H, Willison HJ, Cornblath DR, Gorson KC, Islam Z, Mohammad QD, Sindrup SH, Kusunoki S, Davidson A, Casasnovas C, Bateman K, Miller JAL, van den Berg B, Verboon C, Roodbol J, Leonhard SE, Arends S, Luijten LWG, Benedetti L, Kuwabara S, Van den Bergh P, Monges S, Marfia GA, Shahrizaila N, Galassi G, Pereon Y, Bürmann J, Kuitwaard K, Kleyweg RP, Marchesoni C, Sedano Tous MJ, Querol L, Martín-Aguilar L, Wang Y, Nobile-Orazio E, Rinaldi S, Schenone A, Pardo J, Vermeij FH, Waheed W, Lehmann HC, Granit V, Stein B, Cavaletti G, Gutiérrez-Gutiérrez G, Barroso FA, Visser LH, Katzberg HD, Dardiotis E, Attarian S, van der Kooi AJ, Eftimov F, Wirtz PW, Samijn JPA, Gilhuis HJ, Hadden RDM, Holt JKL, Sheikh KA, Kolb N, Karafiath S, Vytopil M, Antonini G, Feasby TE, Faber C, Kramers H, Busby M, Roberts RC, Silvestri NJ, Fazio R, van Dijk GW, Garssen MPJ, Verschuuren J, Harbo T, and Jacobs BC

Subjects
Adult, Female, Humans, Male, Middle Aged, Cell Count, Cerebrospinal Fluid cytology, Cohort Studies, Disease Progression, Internationality, Miller Fisher Syndrome cerebrospinal fluid, Miller Fisher Syndrome diagnosis, Miller Fisher Syndrome pathology, Miller Fisher Syndrome physiopathology, Prognosis, Treatment Outcome, Guillain-Barre Syndrome cerebrospinal fluid, Guillain-Barre Syndrome diagnosis, Guillain-Barre Syndrome pathology, Guillain-Barre Syndrome physiopathology
Abstract

Background and Objectives: To investigate CSF findings in relation to clinical and electrodiagnostic subtypes, severity, and outcome of Guillain-Barré syndrome (GBS) based on 1,500 patients in the International GBS Outcome Study., Methods: Albuminocytologic dissociation (ACD) was defined as an increased protein level (>0.45 g/L) in the absence of elevated white cell count (<50 cells/μL). We excluded 124 (8%) patients because of other diagnoses, protocol violation, or insufficient data. The CSF was examined in 1,231 patients (89%)., Results: In 846 (70%) patients, CSF examination showed ACD, which increased with time from weakness onset: ≤4 days 57%, >4 days 84%. High CSF protein levels were associated with a demyelinating subtype, proximal or global muscle weakness, and a reduced likelihood of being able to run at week 2 (odds ratio [OR] 0.42, 95% CI 0.25-0.70; p = 0.001) and week 4 (OR 0.44, 95% CI 0.27-0.72; p = 0.001). Patients with the Miller Fisher syndrome, distal predominant weakness, and normal or equivocal nerve conduction studies were more likely to have lower CSF protein levels. CSF cell count was <5 cells/μL in 1,005 patients (83%), 5-49 cells/μL in 200 patients (16%), and ≥50 cells/μL in 13 patients (1%)., Discussion: ACD is a common finding in GBS, but normal protein levels do not exclude this diagnosis. High CSF protein level is associated with an early severe disease course and a demyelinating subtype. Elevated CSF cell count, rarely ≥50 cells/μL, is compatible with GBS after a thorough exclusion of alternative diagnoses., Classification of Evidence: This study provides Class IV evidence that CSF ACD (defined by the Brighton Collaboration) is common in patients with GBS., (© 2023 American Academy of Neurology.)

Published
2023
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37. Characteristics of patients with autonomic dysfunction in the Transthyretin Amyloidosis Outcomes Survey (THAOS).

Author

Barroso FA, Coelho T, Dispenzieri A, Conceição I, Waddington-Cruz M, Wixner J, Maurer MS, Rapezzi C, Planté-Bordeneuve V, Kristen AV, González-Duarte A, Chapman D, Stewart M, and Amass L

Subjects
Humans, Quality of Life, Surveys and Questionnaires, Amyloid Neuropathies, Familial complications, Amyloid Neuropathies, Familial genetics, Primary Dysautonomias
Abstract

Background: Autonomic dysfunction is common in transthyretin amyloidosis (ATTR amyloidosis), but its frequency, characteristics, and quality-of-life (QoL) impact are not well understood., Methods: The Transthyretin Amyloidosis Outcomes Survey (THAOS) is an ongoing, global, longitudinal survey of patients with ATTR amyloidosis, including patients with inherited (ATTRv) and wild-type (ATTRwt) disease and asymptomatic patients with TTR mutations (ClinicalTrials.gov: NCT00628745). In a descriptive analysis, characteristics and Norfolk QoL-DN total (TQoL) scores at enrolment were compared in patients with vs without autonomic dysfunction (analysis cut-off: 1 August 2020)., Results: Autonomic dysfunction occurred in 1181/2922 (40.4%) symptomatic patients, and more commonly in ATTRv (1107/1181 [93.7%]) than ATTRwt (74/1181 [6.3%]) amyloidosis. Time (mean [SD]) from ATTR amyloidosis symptom onset to first autonomic dysfunction symptom was shorter in ATTRv (3.4 [5.7] years) than ATTRwt disease (9.7 [10.4]). In ATTRv disease, patients with vs without autonomic dysfunction had worse QoL (TQoL, 47.3 [33.2] vs 16.1 [18.1]); in ATTRwt disease, those with vs without autonomic dysfunction had similar QoL (23.0 [18.2] vs 19.9 [20.5])., Conclusions: Autonomic dysfunction was more common and presented earlier in symptomatic ATTRv than ATTRwt amyloidosis and adversely affected QoL in ATTRv disease. These THAOS findings may aid clinicians in diagnosing and treating patients with ATTR amyloidosis. Trial registration: ClinicalTrials.gov: NCT00628745.

Published
2022
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38. Electrodiagnosis of Guillain-Barre syndrome in the International GBS Outcome Study: Differences in methods and reference values.

Author

Arends S, Drenthen J, van den Bergh P, Franssen H, Hadden RDM, Islam B, Kuwabara S, Reisin RC, Shahrizaila N, Amino H, Antonini G, Attarian S, Balducci C, Barroso F, Bertorini T, Binda D, Brannagan TH, Buermann J, Casasnovas C, Cavaletti G, Chao CC, Dimachkie MM, Fulgenzi EA, Galassi G, Gutiérrez Gutiérrez G, Harbo T, Hartung HP, Hsieh ST, Kiers L, Lehmann HC, Manganelli F, Marfia GA, Mataluni G, Pardo J, Péréon Y, Rajabally YA, Santoro L, Sekiguchi Y, Stein B, Stettner M, Uncini A, Verboon C, Verhamme C, Vytopil M, Waheed W, Wang M, Zivkovic S, Jacobs BC, and Cornblath DR

Subjects
Electrodiagnosis methods, Humans, Outcome Assessment, Health Care, Reference Values, Guillain-Barre Syndrome diagnosis, Neural Conduction physiology
Abstract

Objective: To describe the heterogeneity of electrodiagnostic (EDx) studies in Guillain-Barré syndrome (GBS) patients collected as part of the International GBS Outcome Study (IGOS)., Methods: Prospectively collected clinical and EDx data were available in 957 IGOS patients from 115 centers. Only the first EDx study was included in the current analysis., Results: Median timing of the EDx study was 7 days (interquartile range 4-11) from symptom onset. Methodology varied between centers, countries and regions. Reference values from the responding 103 centers were derived locally in 49%, from publications in 37% and from a combination of these in the remaining 15%. Amplitude measurement in the EDx studies (baseline-to-peak or peak-to-peak) differed from the way this was done in the reference values, in 22% of motor and 39% of sensory conduction. There was marked variability in both motor and sensory reference values, although only a few outliers accounted for this., Conclusions: Our study showed extensive variation in the clinical practice of EDx in GBS patients among IGOS centers across the regions., Significance: Besides EDx variation in GBS patients participating in IGOS, this diversity is likely to be present in other neuromuscular disorders and centers. This underlines the need for standardization of EDx in future multinational GBS studies., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. All rights reserved.)

Published
2022
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