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1. Whole exome sequencing in childhood-onset lupus frequently detects single gene etiologies

Author

Irit Tirosh, Shiri Spielman, Ortal Barel, Reut Ram, Tali Stauber, Gideon Paret, Marina Rubinsthein, Itai M. Pessach, Maya Gerstein, Yair Anikster, Rachel Shukrun, Adi Dagan, Katerina Adler, Ben Pode-Shakked, Alexander Volkov, Marina Perelman, Shoshana Greenberger, Raz Somech, Einat Lahav, Amar J. Majmundar, Shai Padeh, Friedhelm Hildebrandt, and Asaf Vivante

Subjects
WES, SLE, Monogenic, Pediatrics, RJ1-570, Diseases of the musculoskeletal system, RC925-935
Abstract

Abstract Background Systemic lupus erythematosus (SLE) comprise a diverse range of clinical manifestations. To date, more than 30 single gene causes of lupus/lupus like syndromes in humans have been identified. In the clinical setting, identifying the underlying molecular diagnosis is challenging due to phenotypic and genetic heterogeneity. Methods We employed whole exome sequencing (WES) in patients presenting with childhood-onset lupus with severe and/or atypical presentations to identify cases that are explained by a single-gene (monogenic) cause. Results From January 2015 to June 2018 15 new cases of childhood-onset SLE were diagnosed in Edmond and Lily Safra Children’s Hospital. By WES we identified causative mutations in four subjects in five different genes: C1QC, SLC7A7, MAN2B1, PTEN and STAT1. No molecular diagnoses were established on clinical grounds prior to genetic testing. Conclusions We identified a significant fraction of monogenic SLE etiologies using WES and confirm the genetic locus heterogeneity in childhood-onset lupus. These results highlight the importance of establishing a genetic diagnosis for children with severe or atypical lupus by providing accurate and early etiology-based diagnoses and improving subsequent clinical management.

Published
2019
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2. Elevated IgM levels as a marker for a unique phenotype in patients with Ataxia telangiectasia

Author

Alexander Krauthammer, Avishay Lahad, Lior Goldberg, Ifat Sarouk, Batia Weiss, Raz Somech, Michalle Soudack, and Itai M. Pessach

Subjects
AT, Class switching, Complications, Elevated IgM, Immunoglobulins, Lung functions, Pediatrics, RJ1-570
Abstract

Abstract Background Ataxia telangiectasia (AT) is a rare, multi-systemic, genetic disorder. Mutations in the ATM gene cause dysfunction in cell-cycle, apoptosis and V (D) J recombination leading to neurodegeneration, cellular, humoral immunodeficiencies and predisposition to malignancies. Previous studies have suggested that a sub-group of AT patients with elevated IgM levels have a distinct and more severe phenotype. In the current study we aimed to better characterize this group of patients. Methods We performed a retrospective review of 46 patient records, followed from January 1986 to January 2015 at the Israeli National AT Center. Demographic, clinical, radiological, laboratory data was reviewed and compared between AT patients with elevated IgM levels (EIgM) and patients with normal IgM levels (NIgM). Results 15/46(32.6%) patients had significantly elevated IgM levels. This group had a unique phenotype characterized mainly by increased risk of infection and early mortality. Colonization of lower respiratory tract with Mycobacterium gordonae and Pseudomonas aeruginosa as well as viral skin infections were more frequent in EIgM patients. Patients with NIgM had a significantly longer survival as compared to patients with EIgM but had an increased incidence of fatty liver or cirrhosis. T-cell recombination excision circles and kappa-deleting element recombination circle levels were significantly lower in the EIgM group, suggesting an abnormal class switching in this group. Conclusions EIgM in AT patients are indicative of a more severe phenotype that probably results from a specific immune dysfunction. EIgM in AT should be considered a unique AT phenotype that may require different management.

Published
2018
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3. Abstracts from the 10th C1-inhibitor deficiency workshop

Author

Alvin H. Schmaier, Marco Cicardi, Avner Reshef, Dumitru Moldovan, Attila Mócsai, Margarita López-Trascasa, Alberto López Lera, Nancy J. Brown, Anastasios E. Germenis, Rafael Filippelli-Silva, Diego A. Duarte, Renan P. Martin, Camila L. Veronez, Michel Bouvier, Michael Bader, Claudio M. Costa-Neto, João Bosco Pesquero, Xavier Charest-Morin, François Marceau, Georges-É. Rivard, Arnaud Bonnefoy, Éric Wagner, Márta L. Debreczeni, Zsuzsanna Németh, Erika Kajdácsi, Endre Schwaner, László Cervenak, Gábor Oroszlán, András Szilágyi, Ráhel Dani, Péter Závodszky, Péter Gál, József Dobó, Jacques Hébert, Matthieu Vincent, Jean-Nicolas Boursiquot, Hugo Chapdeleine, Marylin Desjardins, Benoit Laramée, Rémi Gagnon, Nancy Payette, Oleksandra Lepeshkina, Delphine Charignon, Arije Ghannam, Denise Ponard, Christian Drouet, Kusumam Joseph, Baby G. Tholanikunnel, Daniel J. Sexton, Allen P. Kaplan, Stefania Loffredo, Maria Bova, Anne Lise Ferrara, Angelica Petraroli, Chiara Suffritti, Nóra Veszeli, Andrea Zanichelli, Henriette Farkas, Gianni Marone, Samuel Luyasu, Bertrand Favier, Ludovic Martin, Kinga Viktória Kőhalmi, György Temesszentandrási, Katalin Várnai, Lilian Varga, Bruce L. Zuraw, Annette Feussner, Michael A. Tortorici, Dipti Pawaskar, Huamin Henry Li, John Anderson, Jonathan A. Bernstein, Ying Zhang, Ingo Pragst, on behalf of COMPACT investigators, Emel Aygören-Pürsün, Kraig Jacobson, Jim Christensen, Arthur Van Leerberghe, Yi Wang, Jennifer Schranz, Inmaculada Martinez-Saguer, Daniel Soteres, Urs Steiner, Vesna Grivcheva Panovska, William Rae, Werner Aberer, Aarnoud Huissoon, Anette Bygum, Markus Magerl, Jochen Graff, Hilary Longhurst, Ramón Lleonart, Lei Fang, Melanie Cornpropst, Desiree Clemons, Amanda Mathis, Phil Collis, Sylvia Dobo, William P. Sheridan, Marcus Maurer, Marc A. Riedl, Timothy Craig, Aleena Banerji, Mustafa Shennak, William Yang, Jovanna Baptista, Paula Busse, Ira Kalfus, Andrew McDonald, Shawn Qian, Anthony Roberts, Con Panousis, Tim Green, Andreas Gille, Maria Zamanakou, Gedeon Loules, Dorottya Csuka, Fotis Psarros, Faidra Parsopoulou, Matthaios Speletas, Davide Firinu, Tiziana Maria Angela De Pasquale, Alessandra Zoli, Anna Radice, Stefano Pizzimenti, Emmanouil Manoussakis, George N. Konstantinou, Valeria Bafunno, Vincenzo Montinaro, Mauro Cancian, Maurizio Margaglione, Konrad Bork, Karin Wulff, Guenther Witzke, Jochen Hardt, Laurence Bouillet, Teresa Caballero, Anete S. Grumach, Christelle Pommie, Irmgard Andresen, Carmen Escuriola Ettingshausen, Zeynep Gutowski, Karin Andritschke, Richard Linde, Noémi Andrási, Tamás Szilágyi, Iris Leibovich-Nassi, Christine Symons, John Dempster, Isabelle Boccon-Gibod, Anne Pagnier, Audrey Lehmann, Kristian B. Kreiberg, Sandra A. Nieto, Raquel Martins, Renata Martins, Alejandra Menendez, Solange O. R. Valle, Margarita Olivares, Maria E. Hernandez-Landeros, Elma Nievas, Natalia Fili, Olga M. Barrera, René Bailleau, Ana Maria Gallardo-Olivos, Masumi Grau, Julian Rodriguez-Galindo, Marlon J. O. Carabantes, Edison Zapata-Venegas, Mario Martinez Alfonso, Maria Rosario-Grauert, Manuel Ratti, Daniel Vaszquez, Dario Josviack, Luis Fernando Landivar-Salinas, Oscar M. E. Calderón-Llosa, Rolando Campilay-Sarmiento, Pablo Raby, Jose Fabiani, William R. Lumry, Henrike Feuersenger, Douglas J. Watson, Thomas Machnig, on behalf of the Investigators of the COMPACT study, Donatella Lamacchia, Adriana Hernanz, Ana Alvez, Mariana Lluncor, Maria Pedrosa, Rosario Cabañas, Nieves Prior, Patrik Nordenfelt, Mats Nilsson, Anders Lindfors, Carl-Fredrik Wahlgren, Janne Björkander, Roman Hakl, Pavel Kuklínek, Irena Krčmová, Jana Hanzlíková, Martina Vachová, Radana Zachová, Marta Sobotková, Jana Strenková, Jiří Litzman, Maria Palasopoulou, Gerasimina Tsinti, Panagiota Gianni, Maria Kompoti, Sofia Garrido, Wojciech Dyga, Anna Bogdali, Aleksander Obtułowicz, Mikolajczyk Tomasz, Ewa Czarnobilska, Krystyna Obtulowicz, Teofila Książek, Anna Koncz, Dominik Gulyás, Maria Staevska, Milos Jesenak, Katarina Hrubiskova, L. Bellizzi, A. Relan, Maddalena A. Wu, Antonio Castelli, Riccardo Colombo, Gianmarco Podda, Marta Del Medico, Emanuele Catena, Francesco Casella, Francesca Perego, Nada Afifi Afifi, Eleonora Tobaldini, Nicola Montano, for the IOS Study Group, Marta Sánchez-Jareño, Marcin Stobiecki, Krystyna Obtułowicz, Irina Guryanova, Ekaterina Polyakova, Viktar Lebedz, Andrej Salivonchik, Svetlana Aleshkevich, Mikhail Belevtsev, Melanie Nordmann-Kleiner, Susanne Trainotti, Janina Hahn, Jens Greve, Liudmyla Zabrodska, Maria L. Oliva Alonso, Rosangela P. Tórtora, Alfeu T. França, Marcia G. Ribeiro, Lisa Fu, Amin Kanani, Gina Lacuesta, Susan Waserman, Stephen Betschel, Melissa I. Espinosa, Francisco A. Contreras, Martin Hrubisko, Ludmila Vavrova, Peter Banovcin, Maryam Ayazi, Mohammad Reza Fazlollahi, Shiva Saghafi, Sajedeh Mohammadian, Susan Nabilou Deshiry, Kiana Bidad, Raheleh Shokouhi Shoormasti, Iraj Mohammadzadeh, Mohammad Hassan Bemanian, Seyed Alireza Mahdaviani, Zahra Pourpak, Anna Valerieva, Mariela Vasileva, Tsvetelina Velikova, Elena Petkova, Vasil Dimitrov, Ruggero Di Maulo, on behalf of participating centers, Raz Somech, Hava Golander, Erika J. Sifuentes, Catherine Mansard, Anne Gompel, Bernard Floccard, Claire Blanchard-Delaunay, David Launay, Olivier Fain, Alain Sobel, Stéphane Gayet, Stéphanie Amarger, Guillaume Armengol, Yann Ollivier, Ariane Zélinsky-Gurung, Pierre-Yves Jeandel, Gisèle Kanny, Brigitte Coppéré, Marie Dubrel, Fabien Pelletier, Aurélie Du Thanh, Sébastien Trouiller, Jérôme Laurent, Claire De Moreuil, Christine Audouin Pajot, Alexandre Belot, Ana Rodríguez, Dasha Roa, Alicia Prieto, Maria Luisa Baeza, Borislava Krusheva, Stephanie K. A. Almeida, Rosemeire N. Constantino-Silva, Nyla Melo, Joanna Araujo Simoes, Sandra Mitie U. Palma, Jane da Silva, Bruna F. de Azevedo, Eli Mansour, Teresa González-Quevedo, Carmen Marcos, Teófilo Lobera, Blanca Sáenz de San Pedro, Ernie Avilla, Jacquie Badiou, Karen Binkley, Rozita Borici-Mazi, Linda Howlett, Paul K. Keith, Anne Rowe, Peter Waite, Aurore Billebeau, Isabelle Boccon-Gibbod, Kristina Lis, Yael Laitman, Eitan Friedman, N. M. Gokmen, O. Gulbahar, H. Onay, Z. P. Koc, and A. Z. Sin

Subjects
Immunologic diseases. Allergy, RC581-607
Published
2017
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4. Elevated IgM levels as a marker for a unique phenotype in patients with Ataxia telangiectasia

Author

Michalle Soudack, Avishay Lahad, Raz Somech, Alexander Krauthammer, Ifat Sarouk, Lior Goldberg, Batia Weiss, and Itai M. Pessach

Subjects
0301 basic medicine, Lung Diseases, Male, Elevated IgM, Cirrhosis, Complications, Adolescent, Class switching, Immunoglobulins, Mycobacterium gordonae, Infections, 03 medical and health sciences, Ataxia Telangiectasia, 0302 clinical medicine, Lung functions, Neoplasms, Medicine, Humans, Child, Retrospective Studies, biology, business.industry, Liver Diseases, Fatty liver, Genetic disorder, lcsh:RJ1-570, Infant, lcsh:Pediatrics, medicine.disease, biology.organism_classification, Prognosis, Phenotype, Survival Analysis, 030104 developmental biology, Immunoglobulin class switching, Immunoglobulin M, 030220 oncology & carcinogenesis, Child, Preschool, Pediatrics, Perinatology and Child Health, Immunology, Ataxia-telangiectasia, biology.protein, Female, AT, Antibody, business, Biomarkers, Research Article
Abstract

Background Ataxia telangiectasia (AT) is a rare, multi-systemic, genetic disorder. Mutations in the ATM gene cause dysfunction in cell-cycle, apoptosis and V (D) J recombination leading to neurodegeneration, cellular, humoral immunodeficiencies and predisposition to malignancies. Previous studies have suggested that a sub-group of AT patients with elevated IgM levels have a distinct and more severe phenotype. In the current study we aimed to better characterize this group of patients. Methods We performed a retrospective review of 46 patient records, followed from January 1986 to January 2015 at the Israeli National AT Center. Demographic, clinical, radiological, laboratory data was reviewed and compared between AT patients with elevated IgM levels (EIgM) and patients with normal IgM levels (NIgM). Results 15/46(32.6%) patients had significantly elevated IgM levels. This group had a unique phenotype characterized mainly by increased risk of infection and early mortality. Colonization of lower respiratory tract with Mycobacterium gordonae and Pseudomonas aeruginosa as well as viral skin infections were more frequent in EIgM patients. Patients with NIgM had a significantly longer survival as compared to patients with EIgM but had an increased incidence of fatty liver or cirrhosis. T-cell recombination excision circles and kappa-deleting element recombination circle levels were significantly lower in the EIgM group, suggesting an abnormal class switching in this group. Conclusions EIgM in AT patients are indicative of a more severe phenotype that probably results from a specific immune dysfunction. EIgM in AT should be considered a unique AT phenotype that may require different management. Electronic supplementary material The online version of this article (10.1186/s12887-018-1156-1) contains supplementary material, which is available to authorized users.

Published
2018

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