Loss of C2orf69 defines a fatal autoinflammatory syndrome in humans and zebrafish that evokes a glycogen-storage-associated mitochondriopathy

Human C2orf69 is an evolutionarily conserved gene whose function is unknown. Here, we report eight unrelated families from which 20 children presented with a fatal syndrome consisting of severe autoinflammation and progredient leukoencephalopathy with recurrent seizures; 12 of these subjects, whose...

Full description

Saved in:

Bibliographic Details
Published in:	American journal of human genetics 2021-07, Vol.108 (7), p.1301-1317
Main Authors:	Wong, Hui Hui, Seet, Sze Hwee, Maier, Michael, Gurel, Ayse, Traspas, Ricardo Moreno, Lee, Cheryl, Zhang, Shan, Talim, Beril, Loh, Abigail Y.T., Chia, Crystal Y., Teoh, Tze Shin, Sng, Danielle, Rensvold, Jarred, Unal, Sule, Shishkova, Evgenia, Cepni, Ece, Nathan, Fatima M., Sirota, Fernanda L., Liang, Chao, Yarali, Nese, Simsek-Kiper, Pelin O., Mitani, Tadahiro, Ceylaner, Serdar, Arman-Bilir, Ozlem, Mbarek, Hamdi, Gumruk, Fatma, Efthymiou, Stephanie, Uğurlu Çi̇men, Deniz, Georgiadou, Danai, Sotiropoulou, Kortessa, Houlden, Henry, Paul, Franziska, Pehlivan, Davut, Lainé, Candice, Chai, Guoliang, Ali, Nur Ain, Choo, Siew Chin, Keng, Soh Sok, Boisson, Bertrand, Yılmaz, Elanur, Xue, Shifeng, Coon, Joshua J., Ly, Thanh Thao Nguyen, Gilani, Naser, Hasbini, Dana, Kayserili, Hulya, Zaki, Maha S., Isfort, Robert J., Ordonez, Natalia, Tripolszki, Kornelia, Bauer, Peter, Rezaei, Nima, Seyedpour, Simin, Khotaei, Ghamar Taj, Bascom, Charles C., Maroofian, Reza, Chaabouni, Myriam, Alsubhi, Afaf, Eyaid, Wafaa, Işıkay, Sedat, Gleeson, Joseph G., Lupski, James R., Casanova, Jean-Laurent, Pagliarini, David J., Akarsu, Nurten A., Maurer-Stroh, Sebastian, Cetinkaya, Arda, Bertoli-Avella, Aida, Mathuru, Ajay S., Ho, Lena, Bard, Frederic A., Reversade, Bruno
Format:	Article
Language:	eng
Subjects:	Animals Biological Evolution C2ORF69, mitochondriopathy, inflammation, GBE1, encephalopathy, zebrafish, Elbracht-Işikay syndrome, lipase, glycogen, Mendelian genetics Cell Line CRISPR-Cas Systems Encephalitis - genetics Encephalitis - mortality Female Genes, Recessive Glycogen - metabolism Humans Inflammation - genetics Male Membrane Proteins - genetics Mitochondrial Diseases - genetics Mitochondrial Diseases - mortality Pedigree Seizures - genetics Seizures - mortality Zebrafish - genetics
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Human C2orf69 is an evolutionarily conserved gene whose function is unknown. Here, we report eight unrelated families from which 20 children presented with a fatal syndrome consisting of severe autoinflammation and progredient leukoencephalopathy with recurrent seizures; 12 of these subjects, whose DNA was available, segregated homozygous loss-of-function C2orf69 variants. C2ORF69 bears homology to esterase enzymes, and orthologs can be found in most eukaryotic genomes, including that of unicellular phytoplankton. We found that endogenous C2ORF69 (1) is loosely bound to mitochondria, (2) affects mitochondrial membrane potential and oxidative respiration in cultured neurons, and (3) controls the levels of the glycogen branching enzyme 1 (GBE1) consistent with a glycogen-storage-associated mitochondriopathy. We show that CRISPR-Cas9-mediated inactivation of zebrafish C2orf69 results in lethality by 8 months of age due to spontaneous epileptic seizures, which is preceded by persistent brain inflammation. Collectively, our results delineate an autoinflammatory Mendelian disorder of C2orf69 deficiency that disrupts the development/homeostasis of the immune and central nervous systems.
ISSN:	0002-9297 1537-6605