Background: In the current study we aimed to find out the impact of cytokine-inducible Src homology 2 domain protein (CISH) gene polymorphisms on the risk of pulmonary tuberculosis (PTB) in a sample of Iranian population.
Materials and methods: Polymorphisms of CISH rs2239751, rs414171, and rs6768300 were determined in 200 PTB patients and 200 healthy subjects using T-ARMS-PCR or PCR-RFLP method.
Results: The results showed that rs414171 A>T genotypes significantly decreased the risk of PTB (OR=0.16, 95% CI=0.10-0.27, p<0.0001, AT vs AA; OR=0.31, 95% CI=0.14-0.68, p<0.0001, TT vs AA; OR=0.19, 95% CI=0.12-0.29, p<0.0001, AT+TT vs AA; OR=0.29, 95%CI=0.20-0.42, p<0.0001, T vs A). For rs6768300, the findings indicated that this variant decreased the risk of PTB (OR=0.52, 95% CI=0.33-0.82, p=0.005, CG vs GG; OR=0.57, 95% CI=0.38-0.87, p=0.012, C vs G). No significant association was observed between CISH rs2239751 polymorphism and risk/protection of PTB.
Conclusion: Our findings indicated that CISH rs414171 and rs6768300 variants might be associated with protection from PTB.
Keywords: CISH; Polymorphism; Tuberculosis.
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