Genetic association between CD96 locus and immunogenicity to anti-TNF therapy in Crohn's disease.
Aterido A, Palau N, Domènech E et al.
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Abstract
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The production of antibodies to anti-tumor necrosis factor alpha (TNF) agents is one of the main causes of treatment failure in Crohn's disease (CD). To date, however, the contribution of genetics to anti-TNF immunogenicity in CD is still unknown. The objective of the present study was to identify genetic variation associated with anti-TNF immunogenicity in CD. We performed a two-stage genome-wide association study in a cohort of 96 and 123 adalimumab-treated patients, respectively. In the discovery stage, we identified a genome-wide significant association between the CD96 locus and the production of antibodies to anti-TNF treatment (P = 1.88e-09). This association was validated in the replication stage (P < 0.05). The risk allele for anti-TNF immunogenicity was found to be also associated with a lack of response to anti-TNF therapy (P = 0.019). These findings represent an important step toward the understanding of the immunogenicity-based mechanisms that underlie anti-TNF response in CD.
9 European ancestry cases, 53 European ancestry controls
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