Abstract
Purpose
Long-term human papillomavirus (HPV) infection is a prerequisite for cervical cancer. IL-1β and IL-1Ra expression levels play an important role in cervical carcinogenesis. Several functional genetic variants in IL1B and IL-RN have been reported to be associated with IL-1β expression and cancer susceptibility. In the current study, we hypothesized that plasma IL-1β levels, IL-1B and IL-RN polymorphisms were candidate biomarkers for cervical cancer.
Methods
We measured plasma IL-1β levels and genotyped IL-1B and IL-RN polymorphisms in a case–control study of 404 cervical cancer cases and 404 controls in Chinese women.
Results
The mean plasma IL-1β levels in cervical cancer cases (42.19 ± 31.55 pg/ml) was significantly higher than those in controls (34.86 ± 22.68 pg/ml, P = 0.0002), and plasma IL-1β levels above the 75% quartiles in controls (IL-1β ≥ 46.94 pg/ml) were associated with a 1.74-fold significantly increased risk of cervical cancer [95% confidence interval (CI), 1.28–2.36], compared with those of lowest quartile. Multivariate logistic regression analyses revealed that the variant genotypes, IL-1B T-31C TC/CC and C-511T CT/TT, were associated with a significantly increased risk of cervical cancer [adjusted odds ratio (OR), 1.60; 95% CI, 1.16–2.21 for −31TC/CC, and adjusted OR, 1.52; 95% CI, 1.10–2.09 for −511CT/TT, respectively), especially among subjects having higher levels of IL-1β. However, IL-RN VNTR polymorphism was not associated with cervical cancer risk in the current study. Furthermore, the significant differences of IL-1β concentration between cervical cancer cases and controls were observed only among subjects carrying T-31C or C-511T variant genotypes.
Conclusion
Functional IL-1B genotypes may modify plasma IL-1β concentrations to contribute to the etiology of cervical cancer in Chinese women; however, further perspective studies are warranted to test the causal effects of IL-1β concentration in cervical carcinogenesis.
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Abbreviations
- CI:
-
Confidence interval
- HPV:
-
Human papillomavirus
- IL-1β:
-
Interleukin-1β
- LD:
-
Linkage disequilibrium
- OR:
-
Odds ratio
- RFLP:
-
Restriction fragment length polymorphism
- SNPs:
-
Single nucleotide polymorphisms
- VNTR:
-
Number of tandem repeats
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Acknowledgments
This work was supported in part by Program for Changjiang Scholars and Innovative Research Team in University (IRT0631); Key Development Program of Nanjing Medical University (07NMUZ011) and Natural Science Basic Research Program of Jiangsu Colleges (08KJB330002).
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The authors disclose no potential conflict of interest.
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N. Qian, X. Chen contributed equally.
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Qian, N., Chen, X., Han, S. et al. Circulating IL-1β levels, polymorphisms of IL-1B, and risk of cervical cancer in Chinese women. J Cancer Res Clin Oncol 136, 709–716 (2010). https://doi.org/10.1007/s00432-009-0710-5
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DOI: https://doi.org/10.1007/s00432-009-0710-5