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Evaluation of Toll-like receptors 3 (c.1377C/T) and 9 (G2848A) gene polymorphisms in cervical cancer susceptibility

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Abstract

Cervical cancer is emerging as a leading cause of morbidity and mortality in women worldwide. Toll-like Receptor (TLR) gene polymorphisms may contribute to subsequent inter-individual variability in cancer susceptibility. The present study aimed to identify the role of TLR 3 (c.1377C/T) [rs3775290] and TLR 9 (G2848A) [rs352140] gene polymorphisms in the risk of developing cervical cancer in North India. Peripheral blood samples were collected from 200 histopathologically confirmed cervical cancer patients from North India and 200 unrelated, cancer-free, age-matched healthy female controls of similar ethnicity. Genomic DNA was extracted using the salting-out method, and genotyped for TLR 3 and TLR 9 using polymerase chain reaction-based restriction fragment length polymorphism (PCR-RFLP). Our data demonstrated a lack of association between TLR 3 (c.1377C/T) and TLR 9 (G2848A) gene polymorphisms and the risk of developing cervical cancer. TLR 3 CT + TT was marginally associated (P = 0.061; age-adjusted OR = 1.46; 95% CI = 0.98–2.16) with cervical cancer susceptibility. The AA genotype of TLR 9 showed borderline significance (P = 0.053) conferring a marginal increased risk (OR = 2.63, 95%CI = 0.99–7.01) for advanced cancer stages (III + IV). Further, TLR 3 and 9 polymorphisms did not have a significant role in modulation of risk due to tobacco usage in cervical cancer patients. Our study suggests only marginal role of TLR 3 and 9 gene polymorphisms in cervical cancer susceptibility in North India; however, future studies in ethnically diverse populations may provide a more comprehensive involvement of innate immunity in cervical cancer etiology in women worldwide.

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Acknowledgements

Senior Research Fellowship awarded by Indian Council of Medical Research (ICMR), New Delhi to Saumya Pandey is highly acknowledged.

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The authors declare that they have no conflicts of interest.

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Correspondence to Rama Devi Mittal.

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Pandey, S., Mittal, B., Srivastava, M. et al. Evaluation of Toll-like receptors 3 (c.1377C/T) and 9 (G2848A) gene polymorphisms in cervical cancer susceptibility. Mol Biol Rep 38, 4715–4721 (2011). https://doi.org/10.1007/s11033-010-0607-z

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  • DOI: https://doi.org/10.1007/s11033-010-0607-z

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