New sequence variants in HLA Class II/III region associated with susceptibility to knee Osteoarthritis identified by genome-wide association study

Abstract

Osteoarthritis (OA) is a common disease that has a definite genetic component. Only a few OA susceptibility genes that have definite functional evidence and replication of association have been reported, however. Through a genome-wide association study and a replication using a total of ~4,800 Japanese subjects, we identified two single nucleotide polymorphisms (SNPs) (rs7775228 and rs10947262) associated with susceptibility to knee OA. The two SNPs were in a region containing HLA class II/III genes and their association reached genome-wide significance (combined P = 2.43×10-8 for rs7775228 and 6.73×10-8 for rs10947262). Our results suggest that immunologic mechanism is implicated in the etiology of OA. © 2010 Nakajima et al.