LAUSR

OBJECTIVE Development of alloantibodies against coagulation factor VII (FVII) is the main therapeutic challenge in severe congenital FVII deficiency. About 7% of patients with severe congenital FVII deficiency develop an inhibitor against FVII. In this research, the relationship between interleukin (IL)-10 and tumor necrosis factor-alpha (TNF)-α gene variants and inhibitor development was evaluated for a group of Iranian patients with severe congenital factor VII deficiency. METHODS Patients with FVII deficiency were divided into 2 groups: 6 cases and 15 controls. Genotyping was performed using the amplification-refractory mutation system polymerase chain reaction. RESULTS We found that IL-10 rs1800896 A>G gene variant is associated with the risk of FVII inhibitor development (OR = 0.077, 95% CI = 0.016-0.380, P = .001), whereas the TNFα-rs1800629G>A variant has no relation with inhibitor development in severe FVII deficiency. CONCLUSION The results show that the IL-10 rs1800896 A>G variant increases the risk of developing an inhibitor in patients with severe congenital FVII deficiency.