Biallelic variants in WARS1 cause a highly variable neurodevelopmental syndrome and implicate a critical exon for normal auditory function

2022-07-21 | journal article; research paper. A publication with affiliation to the University of Göttingen.

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​Lin, Sheng‐Jia, Barbara Vona, Hillary M. Porter, Mahmoud Izadi, Kevin Huang, Yves Lacassie, Jill A. Rosenfeld et al. "Biallelic variants in WARS1 cause a highly variable neurodevelopmental syndrome and implicate a critical exon for normal auditory function​." ​Human Mutation ​43, no. 10 (2022): ​1472​-1489​. ​https://doi.org/10.1002/humu.24435.

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Authors
Lin, Sheng‐Jia; Vona, Barbara; Porter, Hillary M.; Izadi, Mahmoud; Huang, Kevin; Lacassie, Yves; Rosenfeld, Jill A.; Khan, Saadullah; Petree, Cassidy; Ali, Tayyiba A.; Muhammad, Nazif; Khan, Sher A.; Muhammad, Noor; Liu, Pengfei; Haymon, Marie‐Louise; Rüschendorf, Franz; Kong, Il‐Keun; Schnapp, Linda; Shur, Natasha; Chorich, Lynn; Layman, Lawrence; Haaf, Thomas; Pourkarimi, Ehsan; Kim, Hyung‐Goo; Varshney, Gaurav K.
Abstract
Aminoacyl-tRNA synthetases (ARSs) are essential enzymes for faithful assignment of amino acids to their cognate tRNA. Variants in ARS genes are frequently associated with clinically heterogeneous phenotypes in humans and follow both autosomal dominant or recessive inheritance patterns in many instances. Variants in tryptophanyl-tRNA synthetase 1 (WARS1) cause autosomal dominantly inherited distal hereditary motor neuropathy and Charcot-Marie-Tooth disease. Presently, only one family with biallelic WARS1 variants has been described. We present three affected individuals from two families with biallelic variants (p.Met1? and p.(Asp419Asn)) in WARS1, showing varying severities of developmental delay and intellectual disability. Hearing impairment and microcephaly, as well as abnormalities of the brain, skeletal system, movement/gait, and behavior were variable features. Phenotyping of knocked down wars-1 in a Caenorhabditis elegans model showed depletion is associated with defects in germ cell development. A wars1 knockout vertebrate model recapitulates the human clinical phenotypes, confirms variant pathogenicity, and uncovers evidence implicating the p.Met1? variant as potentially impacting an exon critical for normal hearing. Together, our findings provide consolidating evidence for biallelic disruption of WARS1 as causal for an autosomal recessive neurodevelopmental syndrome and present a vertebrate model that recapitulates key phenotypes observed in patients.
Issue Date
21-July-2022
Journal
Human Mutation 
Project
EXC 2067: Multiscale Bioimaging 
Organization
Klinik für Hals-Nasen-Ohrenheilkunde ; Universitätsmedizin Göttingen 
Working Group
RG Wollnik 
External URL
https://mbexc.uni-goettingen.de/literature/publications/524
ISSN
1059-7794
eISSN
1098-1004
Language
English
Sponsor
Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
Qatar Foundation http://dx.doi.org/10.13039/100007458
National Research Foundation of Korea http://dx.doi.org/10.13039/501100003725
Oklahoma Medical Research Foundation http://dx.doi.org/10.13039/100008907
Presbyterian Health Foundation http://dx.doi.org/10.13039/100001298

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