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An IFIH1 gene polymorphism associated with risk for autoimmunity regulates canonical antiviral defence pathways in Coxsackievirus infected human pancreatic islets
Karolinska Univ Hosp, Karolinska Inst, Dept Med HS, Ctr Infect Med, S-14186 Stockholm, Sweden..
Karolinska Univ Hosp, Karolinska Inst, Dept Med HS, Ctr Infect Med, S-14186 Stockholm, Sweden..
Univ Turku, Turku Ctr Biotechnol, FIN-20520 Turku, Finland.;Abo Akad Univ, FIN-20520 Turku, Finland..
Karolinska Univ Hosp, Karolinska Inst, Dept Med HS, Ctr Infect Med, S-14186 Stockholm, Sweden.;Astra Zeneca AB R&D, Pepparedsleden 1, S-43150 Molndal, Sweden..
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2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, article id 39378Article in journal (Refereed) Published
Abstract [en]

The IFIH1 gene encodes the pattern recognition receptor MDA5. A common polymorphism in IFIH1 (rs1990760, A946T) confers increased risk for autoimmune disease, including type 1-diabetes (T1D). Coxsackievirus infections are linked to T1D and cause beta-cell damage in vitro. Here we demonstrate that the rs1990760 polymorphism regulates the interferon (IFN) signature expressed by human pancreatic islets following Coxsackievirus infection. A strong IFN signature was associated with high expression of IFN lambda 1 and IFN lambda 2, linking rs1990760 to the expression of type III IFNs. In the highresponding genotype, IRF-1 expression correlated with that of type III IFN, suggesting a positivefeedback on type III IFN transcription. In summary, our study uncovers an influence of rs1990760 on the canonical effector function of MDA5 in response to an acute infection of primary human parenchymal cells with a clinically relevant virus linked to human T1D. It also highlights a previously unrecognized connection between the rs1990760 polymorphism and the expression level of type III IFNs.

Place, publisher, year, edition, pages
2016. Vol. 6, article id 39378
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Immunology in the medical area
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URN: urn:nbn:se:uu:diva-313527DOI: 10.1038/srep39378ISI: 000390208500001OAI: oai:DiVA.org:uu-313527DiVA, id: diva2:1070990
Funder
EU, FP7, Seventh Framework Programme, 261441/PEVNETSwedish Child Diabetes FoundationSwedish Diabetes AssociationVINNOVAAvailable from: 2017-02-02 Created: 2017-01-20 Last updated: 2018-01-13Bibliographically approved

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