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© Research
Publication : Proceedings of the National Academy of Sciences of the United States of America

De novo germline mutation in the dual specificity phosphatase 10 gene accelerates autoimmune diabetes.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Proceedings of the National Academy of Sciences of the United States of America - 23 Nov 2021

Foray AP, Candon S, Hildebrand S, Marquet C, Valette F, Pecquet C, Lemoine S, Langa-Vives F, Dumas M, Hu P, Santamaria P, You S, Lyon S, Scott L, Bu CH, Wang T, Xu D, Moresco EMY, Scazzocchio C, Bach JF, Beutler B, Chatenoud L,

Link to Pubmed [PMID] – 34782469

Link to DOI – e211203211810.1073/pnas.2112032118

Proc Natl Acad Sci U S A 2021 11; 118(47):

Insulin-dependent or type 1 diabetes (T1D) is a polygenic autoimmune disease. In humans, more than 60 loci carrying common variants that confer disease susceptibility have been identified by genome-wide association studies, with a low individual risk contribution for most variants excepting those of the major histocompatibility complex (MHC) region (40 to 50% of risk); hence the importance of missing heritability due in part to rare variants. Nonobese diabetic (NOD) mice recapitulate major features of the human disease including genetic aspects with a key role for the MHC haplotype and a series of Idd loci. Here we mapped in NOD mice rare variants arising from genetic drift and significantly impacting disease risk. To that aim we established by selective breeding two sublines of NOD mice from our inbred NOD/Nck colony exhibiting a significant difference in T1D incidence. Whole-genome sequencing of high (H)- and low (L)-incidence sublines (NOD/NckH and NOD/NckL) revealed a limited number of subline-specific variants. Treating age of diabetes onset as a quantitative trait in automated meiotic mapping (AMM), enhanced susceptibility in NOD/NckH mice was unambiguously attributed to a recessive missense mutation of Dusp10, which encodes a dual specificity phosphatase. The causative effect of the mutation was verified by targeting Dusp10 with CRISPR-Cas9 in NOD/NckL mice, a manipulation that significantly increased disease incidence. The Dusp10 mutation resulted in islet cell down-regulation of type I interferon signature genes, which may exert protective effects against autoimmune aggression. De novo mutations akin to rare human susceptibility variants can alter the T1D phenotype.

https://pubmed.ncbi.nlm.nih.gov/34782469