Cited by 958Diabetes and associated disordersGenetic Associations and Epidemiologyinterferon and immune responses

Rare Variants of IFIH1 , a Gene Implicated in Antiviral Responses, Protect Against Type 1 Diabetes

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Nejentsev, Sergey, Walker, Neil, Riches, David, Egholm, Michael, Todd, John A.·2009·Science

Abstract

Genome-wide association studies (GWASs) are regularly used to map genomic regions contributing to common human diseases, but they often do not identify the precise causative genes and sequence variants. To identify causative type 1 diabetes (T1D) variants, we resequenced exons and splice sites of 10 candidate genes in pools of DNA from 480 patients and 480 controls and tested their disease association in over 30,000 participants. We discovered four rare variants that lowered T1D risk independently of each other (odds ratio = 0.51 to 0.74; P = 1.3 × 10 –3 to 2.1 × 10 –16 ) in IFIH1 ( interferon induced with helicase C domain 1 ), a gene located in a region previously associated with T1D by GWASs. These variants are predicted to alter the expression and structure of IFIH1 [MDA5 (melanoma differentiation-associated protein 5)], a cytoplasmic helicase that mediates induction of interferon response to viral RNA. This finding firmly establishes the role of IFIH1 in T1D and demonstrates that resequencing studies can pinpoint disease-causing genes in genomic regions initially identified by GWASs.

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  • An initial inflammatory bowel disease screen found rare-variant evidence for just one of 63 GWAS-identified genes.

    “only 1 of 63 genes in an initial screen for inflammatory bowel disease found evidence for rare variant effects (and these were protective114, but see also115)”

    From Rare and common variants: twenty arguments (2012) · cites this paper as [113]

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  1. [11]Todd JA Nat Genet 2007 39 857 17554260 PMC2492393
  2. [24]Hyoty H Taylor KW Diabetologia 2002 45 1353 12378375

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Authors
Nejentsev, S., Walker, N., Riches, D., Egholm, M., & Todd, J. A.
Affiliations
University of Cambridge (GB)
Corresponding author
Nejentsev, Sergey
Venue
Science
Published
2009-04-17
Volume
324
Issue
5925
Pages
387-389
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2020040634
Cited by
958
References
25
Citations by year
2026: 7 · 2025: 14 · 2024: 11 · 2023: 25 · 2022: 22 · 2021: 29 · 2020: 30 · 2019: 30 · 2018: 27 · 2017: 47 · 2016: 36 · 2015: 72 · 2014: 72 · 2013: 109 · 2012: 115
FWCI
82.79
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • Wellcome Trust (061858, 079895)
  • National Institute for Health and Care Research (NF-SI-0508-10275)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
Keywords
type 1 diabetes, MDA5, rare variants, antiviral response, interferon induction, viral RNA sensing, disease-associated genes, genetic risk
MeSH terms
Interferon-Induced Helicase, IFIH1, Base Sequence, Diabetes Mellitus, Type 1, Gene Frequency, Humans, Molecular Sequence Data, Risk, Risk Factors, Genetic Variation, Linkage Disequilibrium, Case-Control Studies, Sequence Analysis, DNA, Codon, Nonsense, Genetic Predisposition to Disease, Polymorphism, Single Nucleotide, RNA Splice Sites, DEAD-box RNA Helicases, Genome-Wide Association Study

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