Abstract
Purpose
To investigate the association between IL-6 gene polymorphism and cervical cancer risk, and the impact of multiple gene–gene interaction on cervical cancer risk based on a Chinese Han population.
Methods
A total of 1088 women were selected, including 360 cervical cancer patients and 728 control subjects. Logistic regression model was used to examine the association between SNPs within IL-6 and cervical cancer risk. Odds ratio (OR) and 95 % confident interval (95 % CI) were calculated. Generalized multifactor dimensionality reduction (GMDR) was employed to analyze the gene–gene interaction.
Results
Cervical cancer risks were significantly higher in carriers of C allele of rs1800795 polymorphism than those with GG genotype (GC+CC versus GG), adjusted OR (95 % CI) 1.60 (1.24–2.19), and also significantly higher in carriers of G allele of rs2069837 polymorphism than those with AA (AG+GG versus AA), adjusted OR (95 % CI) 1.49 (1.19–2.07). GMDR analysis found a significant gene–gene interaction between rs1800795 and rs2069837 (p = 0.0010). Overall, the two-locus models had a cross-validation consistency of 10 of 10, and had the testing accuracy of 61.72 %. We also calculated the odds ratios and 95 % CI for this interaction, and we found that subjects with GC or CC of rs1800795 and AG or GG of rs2069837 genotype have the highest cervical cancer risk, compared to subjects with GG of rs1800795 and AA of rs2069837 genotype, OR (95 % CI) 3.35 (2.01–4.78).
Conclusions
Minor allele of rs1800795 and rs2069837 and its interaction were associated with increased cervical cancer risk.
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Acknowledgments
The writing of this paper was supported by Shanghai First Maternity, Infant Hospital and Shanghai First Maternity and Infant Hospital and Shanghai Key Laboratory of Gynecologic Oncology. We thank all the partners and staffs who help us in the process of this study. Xiaowen Pu and Zhuowei Gu contributed equally to this work.
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All authors declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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X. Pu and Z. Gu contributed equally to this work.
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Pu, X., Gu, Z. & Wang, X. Polymorphisms of the interleukin 6 gene and additional gene–gene interaction contribute to cervical cancer susceptibility in Eastern Chinese women. Arch Gynecol Obstet 294, 1305–1310 (2016). https://doi.org/10.1007/s00404-016-4175-x
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DOI: https://doi.org/10.1007/s00404-016-4175-x