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Mutations in KEOPS-complex genes cause nephrotic syndrome with primary microcephaly

2017; Nature Portfolio; Volume: 49; Issue: 10 Linguagem: Inglês

10.1038/ng.3933

1546-1718

Daniela A. Braun, Jia Rao, Géraldine Mollet, David Schapiro, Marie-Claire Daugeron, Weizhen Tan, Olivier Gribouval, Olivia Boyer, Patrick Revy, Tilman Jobst‐Schwan, Johanna Magdalena Schmidt, Jennifer A. Lawson, Denny Schanze, Shazia Ashraf, Jeremy F.P. Ullmann, Charlotte A. Hoogstraten, Nathalie Boddaert, Bruno Collinet, Gaëlle Martin, Dominique Liger, Svjetlana Lovric, Mónica Furlano, Ida Chiara Guerrera, Oraly Sanchez-Ferras, Jennifer Hu, Anne‐Claire Boschat, Sylvia Sanquer, Björn Menten, Sarah Vergult, Nina De Rocker, Merlin Airik, Tobias Hermle, Shirlee Shril, Eugen Widmeier, Heon Yung Gee, Won‐Il Choi, Carolin E. Sadowski, Werner L. Pabst, Jillian K. Warejko, Ankana Daga, Tamara Basta, Verena Matejas, Karin Scharmann, Sandra D. Kienast, Babak Behnam, Brendan Beeson, Amber Begtrup, M. Bruce, Gaik-Siew Ch’ng, Shuan‐Pei Lin, Jui-Hsing Chang, Chao‐Huei Chen, Megan T. Cho, Patrick M. Gaffney, Patrick Gipson, Chyong-Hsin Hsu, Jameela A. Kari, Yu-Yuan Ke, Cathy Kiraly‐Borri, Wai-ming Lai, Emmanuelle Lemyre, Rebecca O. Littlejohn, Amira Masri, Mastaneh Moghtaderi, Kazuyuki Nakamura, Fatih Özaltın, Marleen Praet, Chitra Prasad, Agnieszka Prytula-Ebels, Elizabeth Roeder, Patrick Rump, Rhonda E. Schnur, Takashi Shiihara, Manish D. Sinha, Neveen A. Soliman, Kenza Soulami, David A. Sweetser, Wen‐Hui Tsai, Jeng-Daw Tsai, Rezan Topaloĝlu, Udo Vester, David H. Viskochil, Nithiwat Vatanavicharn, Jessica L. Waxler, Klaas J. Wierenga, Matthias T. F. Wolf, Sik-Nin Wong, Sebastian A. Leidel, Gessica Truglio, Peter C. Dedon, Annapurna Poduri, Shrikant Mane, Richard P. Lifton, Maxime Bouchard, Pekka Kannus, David Chitayat, Daniella Magen, Bert Callewaert, Herman van Tilbeurgh, Martin Zenker, Corinne Antignac, Friedhelm Hildebrandt,

Genetic and Kidney Cyst Diseases

Martin Zenker, Corinne Antignac, Friedhelm Hildebrandt and colleagues report that mutations in OSGEP, TP53RK, TPRKB and LAGE3, genes encoding KEOPS-complex subunits, cause Galloway–Mowat syndrome, a recessive disease characterized by early-onset steroid-resistant nephrotic syndrome and microcephaly. Functional studies suggest that the phenotypes result from impaired protein translation, thus leading to endoplasmic reticulum stress and apoptosis. Galloway–Mowat syndrome (GAMOS) is an autosomal-recessive disease characterized by the combination of early-onset nephrotic syndrome (SRNS) and microcephaly with brain anomalies. Here we identified recessive mutations in OSGEP, TP53RK, TPRKB, and LAGE3, genes encoding the four subunits of the KEOPS complex, in 37 individuals from 32 families with GAMOS. CRISPR–Cas9 knockout in zebrafish and mice recapitulated the human phenotype of primary microcephaly and resulted in early lethality. Knockdown of OSGEP, TP53RK, or TPRKB inhibited cell proliferation, which human mutations did not rescue. Furthermore, knockdown of these genes impaired protein translation, caused endoplasmic reticulum stress, activated DNA-damage-response signaling, and ultimately induced apoptosis. Knockdown of OSGEP or TP53RK induced defects in the actin cytoskeleton and decreased the migration rate of human podocytes, an established intermediate phenotype of SRNS. We thus identified four new monogenic causes of GAMOS, describe a link between KEOPS function and human disease, and delineate potential pathogenic mechanisms.