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Spliceosome malfunction causes neurodevelopmental disorders with overlapping features

2023; American Society for Clinical Investigation; Volume: 134; Issue: 1 Linguagem: Inglês

10.1172/jci171235

1558-8238

Dong Li, Qin Wang, Allan Bayat, Mark R. Battig, Yijing Zhou, Daniëlle G.M. Bosch, Gijs van Haaften, Leslie Granger, Andrea Petersen, Luis A. Pérez‐Jurado, Gemma Aznar-Laín, Anushree Aneja, Miroslava Hančárová, Šárka Bendová, Martin Schwarz, Radka Kremlíková Pourová, Zdeněk Sedláček, Beth Keena, Michael March, Cuiping Hou, Nora O’Connor, Elizabeth Bhoj, Margaret Harr, Gabrielle Lemire, Kym M. Boycott, Meghan C. Towne, Megan Li, Mark A. Tarnopolsky, Lauren Brady, Michael Parker, Hanna Faghfoury, Lea Kristin Parsley, Emanuele Agolini, Maria Lisa Dentici, Antonio Novelli, Meredith S. Wright, Rachel Palmquist, Khanh Lai, Marcello Scala, Pasquale Striano, Michele Iacomino, Federico Zara, Annina H. Cooper, Timothy J. Maarup, Melissa Byler, Robert Roger Lebel, Tuğçe B. Balcı, Raymond J. Louie, Michael J. Lyons, Jessica Douglas, C. Nowak, Alexandra Afenjar, Juliane Hoyer, Boris Keren, Saskia M. Maas, M. Mahdi Motazacker, Julián A. Martínez-Agosto, Ahna M. Rabani, Elizabeth M. McCormick, Marni J. Falk, Sarah M. Ruggiero, Ingo Helbig, Rikke S. Møller, Lino Tessarollo, Francesco Tomassoni‐Ardori, Mary Ellen Palko, Tzung‐Chien Hsieh, Peter Krawitz, Mythily Ganapathi, Bruce D. Gelb, Vaidehi Jobanputra, Ashley Wilson, John M. Greally, Sébastien Jacquemont, Khadijé Jizi, Ange‐Line Bruel, Chloé Quēlin, Vinod K. Misra, Erika Chick, Corrado Romano, Donatella Greco, Alessia Arena, Manuela Morleo, Vincenzo Nigro, Rie Seyama, Yuri Uchiyama, Naomichi Matsumoto, Ryoji Taira, Katsuya Tashiro, Yasunari Sakai, Gökhan Yigit, Bernd Wollnik, Michael Wagner, Barbara Kutsche, Anna Hurst, Michelle L. Thompson, Ryan Schmidt, Linda M. Randolph, Rebecca C. Spillmann, Vandana Shashi, Edward J. Higginbotham, Dawn Cordeiro, Amanda Carnevale, Gregory Costain, Tayyaba Khan, Benoît Funalot, Frédéric Tran Mau‐Them, Luis Fernandez Garcia Moya, Sixto García‐Miñaúr, Matthew Osmond, Lauren Chad, Nada Quercia, Diana Carrasco, Chumei Li, Amarilis Sanchez‐Valle, Meghan Kelley, Mathilde Nizon, Brynjar Ö. Jensson, Patrick Sulem, Kári Stéfansson, Svetlana Gorokhova, Tiffany Busa, Marlène Rio, Hamza Hadj Habdallah, Marion Lesieur‐Sebellin, Jeanne Amiel, Véronique Pingault, Sandra Mercier, Marie Vincent, Christophe Philippe, Clémence Fatus-Fauconnier, Kathryn Friend, Rebecca Halligan, Sunita Biswas, Jane Rosser, Cheryl Shoubridge, Mark Corbett, Christopher Barnett, Jozef Gécz, Kathleen A. Leppig, Anne Slavotinek, Carlo Marcelis, Rolph Pfundt, Bert B.A. de Vries, Marjon A. van Slegtenhorst, Alice S. Brooks, Benjamin Cogné, Thomas Rambaud, Zeynep Tümer, Elaine H. Zackai, Naiara Akizu, Yuanquan Song, Hákon Hákonarson,

Nuclear Structure and Function

Pre-mRNA splicing is a highly coordinated process. While its dysregulation has been linked to neurological deficits, our understanding of the underlying molecular and cellular mechanisms remains limited. We implicated pathogenic variants in U2AF2 and PRPF19, encoding spliceosome subunits in neurodevelopmental disorders (NDDs), by identifying 46 unrelated individuals with 23 de novo U2AF2 missense variants (including 7 recurrent variants in 30 individuals) and 6 individuals with de novo PRPF19 variants. Eight U2AF2 variants dysregulated splicing of a model substrate. Neuritogenesis was reduced in human neurons differentiated from human pluripotent stem cells carrying two U2AF2 hyper-recurrent variants. Neural loss of function (LoF) of the Drosophila orthologs U2af50 and Prp19 led to lethality, abnormal mushroom body (MB) patterning, and social deficits, which were differentially rescued by wild-type and mutant U2AF2 or PRPF19. Transcriptome profiling revealed splicing substrates or effectors (including Rbfox1, a third splicing factor), which rescued MB defects in U2af50-deficient flies. Upon reanalysis of negative clinical exomes followed by data sharing, we further identified 6 patients with NDD who carried RBFOX1 missense variants which, by in vitro testing, showed LoF. Our study implicates 3 splicing factors as NDD-causative genes and establishes a genetic network with hierarchy underlying human brain development and function.