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  1. Association between polymorphisms of interleukin-17A G197A and interleukin-17F A7488G and risk of colorectal cancer
    Samiei G, Yip WK, Leong PP, Jabar MF, Dusa NM, Mohtarrudin N, et al.
    J Cancer Res Ther, 2018 Jun;14(Supplement):S299-S305.
    PMID: 29970680 DOI: 10.4103/0973-1482.235345
    Background: Interleukin (IL)-17A and IL-17F are inflammatory cytokines mainly produced by T helper 17 cells. IL-17A is known to be protumorigenic while IL-17F has a protective role in cancer. A number of studies have been conducted to determine the association between polymorphisms of IL-17AG197A (rs2275913) and IL-17FA7488G (rs763780) and risk of cancers. No studies have yet to be conducted to genotype the IL-17AG197A polymorphism in colorectal cancer (CRC).

    Objective: To assess the association of IL-17AG197A and IL-17FA7488G polymorphisms with CRC risk.

    Materials and Methods: We performed the genotyping by polymerase chain reaction-restriction fragment length polymorphism method on blood samples from 80 healthy individuals and paraffin-embedded tumor tissues from 70 CRC patients.

    Results: Our study showed that IL-17A197AA genotype was significantly associated with an increased CRC risk with odds ratios of 6.08 (95% confidence interval [CI]: 2.25-16.42, P < 0.001) and 2.80 (95% CI: 1.23-6.35, P = 0.014), in comparison with GG and AG genotypes, respectively. However, IL-17FA7488G polymorphism was not significantly associated with CRC risk (P = 0.102). No significant association of IL-17AG197A and IL-17FA7488G polymorphisms with patient and tumor variables was found.

    Conclusion: This report from Malaysia shows the relationship of IL-17A197AA genotype with susceptibility to CRC.

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