Genetic sharing and heritability of paediatric age of onset autoimmune diseases

Yun R Li, Sihai D Zhao, Jin Li, Jonathan P Bradfield, Maede Mohebnasab, Laura Steel, Julie Kobie, Debra J Abrams, Frank D Mentch, Joseph T Glessner, Yiran Guo, Zhi Wei, John J Connolly, Christopher J Cardinale, Marina Bakay, Dong Li, S Melkorka Maggadottir, Kelly A Thomas, Haijun Qui, Rosetta M ChiavacciCecilia E Kim, Fengxiang Wang, James Snyder, Berit Flatø, Øystein Førre, Lee A Denson, Susan D Thompson, Mara L Becker, Stephen L Guthery, Anna Latiano, Elena Perez, Elena Resnick, Caterina Strisciuglio, Annamaria Staiano, Erasmo Miele, Mark S Silverberg, Benedicte A Lie, Marilynn Punaro, Richard K Russell, David C Wilson, Marla C Dubinsky, Dimitri S Monos, Vito Annese, Jane E Munro, Carol Wise, Helen Chapel, Charlotte Cunningham-Rundles, Jordan S Orange, Edward M Behrens, Kathleen E Sullivan, Subra Kugathasan, Anne M Griffiths, Jack Satsangi, Struan F A Grant, Patrick M A Sleiman, Terri H Finkel, Constantin Polychronakos, Robert N Baldassano, Eline T Luning Prak, Justine A Ellis, Hongzhe Li, Brendan J Keating, Hakon Hakonarson

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Autoimmune diseases (AIDs) are polygenic diseases affecting 7-10% of the population in the Western Hemisphere with few effective therapies. Here, we quantify the heritability of paediatric AIDs (pAIDs), including JIA, SLE, CEL, T1D, UC, CD, PS, SPA and CVID, attributable to common genomic variations (SNP-h(2)). SNP-h(2) estimates are most significant for T1D (0.863±s.e. 0.07) and JIA (0.727±s.e. 0.037), more modest for UC (0.386±s.e. 0.04) and CD (0.454±0.025), largely consistent with population estimates and are generally greater than that previously reported by adult GWAS. On pairwise analysis, we observed that the diseases UC-CD (0.69±s.e. 0.07) and JIA-CVID (0.343±s.e. 0.13) are the most strongly correlated. Variations across the MHC strongly contribute to SNP-h(2) in T1D and JIA, but does not significantly contribute to the pairwise rG. Together, our results partition contributions of shared versus disease-specific genomic variations to pAID heritability, identifying pAIDs with unexpected risk sharing, while recapitulating known associations between autoimmune diseases previously reported in adult cohorts.

Original languageEnglish
Pages (from-to)8442
JournalNature Communications
Publication statusPublished - 9 Oct 2015


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