Article abstract
Nature Genetics
Published online: 2 March 2008 | doidoidoi:10.1038/ng.102
Newly identified genetic risk variants for celiac disease related to the immune response
Karen A Hunt
1, Alexandra Zhernakova
2, Graham Turner
3, Graham A R Heap
1, Lude Franke
2, Marcel Bruinenberg
4, Jihane Romanos
4, Lotte C Dinesen
5, Anthony W Ryan
3, Davinder Panesar
1, Rhian Gwilliam
6, Fumihiko Takeuchi
6, William M McLaren
6, Geoffrey K T Holmes
7, Peter D Howdle
8, Julian R F Walters
9, David S Sanders
10, Raymond J Playford
1, Gosia Trynka
4, Chris J J Mulder
11, M Luisa Mearin
12,
13, Wieke H M Verbeek
11, Valerie Trimble
3, Fiona M Stevens
14, Colm O'Morain
3, Nicholas P Kennedy
3, Dermot Kelleher
3, Daniel J Pennington
1, David P Strachan
15, Wendy L McArdle
16, Charles A Mein
17, Martin C Wapenaar
4, Panos Deloukas
6, Ralph McGinnis
6, Ross McManus
3,
18, Cisca Wijmenga
2,
4,
18 & David A van Heel
1,
18 Abstract
Our genome-wide association study of celiac disease previously identified risk variants in the IL2-IL21 region. To identify additional risk variants, we genotyped 1,020 of the most strongly associated non-HLA markers in an additional 1,643 cases and 3,406 controls. Through joint analysis including the genome-wide association study data (767 cases, 1,422 controls), we identified seven previously unknown risk regions (P < 5
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10-7). Six regions harbor genes controlling immune responses, including CCR3, IL12A, IL18RAP, RGS1, SH2B3 (nsSNP rs3184504) and TAGAP. Whole-blood IL18RAP mRNA expression correlated with IL18RAP genotype. Type 1 diabetes and celiac disease share HLA-DQ, IL2-IL21, CCR3 and SH2B3 risk regions. Thus, this extensive genome-wide association follow-up study has identified additional celiac disease risk variants in relevant biological pathways.