Triplication of the interferon receptor locus contributes to hallmarks of Down syndrome in a mouse model
- PMID: 37277650
- PMCID: PMC10260402
- DOI: 10.1038/s41588-023-01399-7
Triplication of the interferon receptor locus contributes to hallmarks of Down syndrome in a mouse model
Abstract
Down syndrome (DS), the genetic condition caused by trisomy 21, is characterized by variable cognitive impairment, immune dysregulation, dysmorphogenesis and increased prevalence of diverse co-occurring conditions. The mechanisms by which trisomy 21 causes these effects remain largely unknown. We demonstrate that triplication of the interferon receptor (IFNR) gene cluster on chromosome 21 is necessary for multiple phenotypes in a mouse model of DS. Whole-blood transcriptome analysis demonstrated that IFNR overexpression associates with chronic interferon hyperactivity and inflammation in people with DS. To define the contribution of this locus to DS phenotypes, we used genome editing to correct its copy number in a mouse model of DS, which normalized antiviral responses, prevented heart malformations, ameliorated developmental delays, improved cognition and attenuated craniofacial anomalies. Triplication of the Ifnr locus modulates hallmarks of DS in mice, suggesting that trisomy 21 elicits an interferonopathy potentially amenable to therapeutic intervention.
© 2023. The Author(s).
Conflict of interest statement
J.M.E. has provided consulting services for Eli Lilly Co. and Gilead Sciences Inc. and serves in the advisory board of Perha Pharmaceuticals. The remaining authors declare no competing interests.
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Comment in
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Genes with immune functions modulate key traits associated with Down syndrome in mice.Nat Genet. 2023 Jun;55(6):910-911. doi: 10.1038/s41588-023-01400-3. Nat Genet. 2023. PMID: 37277651 No abstract available.
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