Association of TNFα, IFNγ, and IL10 Gene Polymorphisms and the Risk of Non-small Cell Lung Cancer in the Population of the South Indian State of Telangana
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Background: Cytokine-mediated inflammation is important in the pathogenesis of non-small cell lung cancer (NSCLC). Genetic polymorphisms in cytokine genes and their association with lung cancer in the Indian population have not been reported.
Methods: For the first time, we analyzed genetic polymorphisms of TNFα , IFNγ , and IL10 genes in 246 NSCLC patients and 250 healthy controls in the South Indian population from Telangana using ARMS PCR.
Results: IFNγ A/T and IL10 G/G gene polymorphisms were found to be significantly associated with NSCLC with 1.56- and 1.68-fold disease risk, respectively. There was no association between the risk of NSCLC and TNFα polymorphism. Gene polymorphisms stratified according to smoking revealed that IFNγ A/T polymorphisms in smokers increased the disease risk by 2.91 fold. IL10 G/G polymorphisms showed 2-fold increased risk among patients who were smokers when compared to the controls. However, there was no association between TNFα, IFNγ, and IL10 gene polymorphism and the stage of the NSCLC patients. The overall risk associated with the combination of these polymorphisms indicated that the TNFα G/A + IFNγ A/T + IL10 G/G genotype increased the risk by 1.5 fold.
Conclusions: The results of our study indicate an association between cytokine gene polymorphisms and the risk of NSCLC in an Indian population.
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