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Onco Targets Ther. 2016 Mar 4;9:1151-8. doi: 10.2147/OTT.S96990. eCollection 2016.

Association between L55M polymorphism in Paraoxonase 1 and cancer risk: a meta-analysis based on 21 studies.

Author information

1
Department of Urology, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China.
2
Department of Urology, Anhui Medical University Graduate School, Hefei, Anhui, People's Republic of China.
3
Department of Urology, The Second Hospital of Lanzhou University, Lanzhou, People's Republic of China.
4
Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People's Republic of China.

Abstract

L55M polymorphism in Paraoxonase 1 (PON1) has been regarded as a risk factor for many cancer types. Nevertheless, the results remain controversial and inconclusive. We therefore performed a meta-analysis of all eligible case-control studies to evaluate the association between L55M polymorphism and cancer risk. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of the associations. Finally, a total of 5,627 cases and 6,390 controls, arising from 21 case-control studies, were enrolled in our study. Significant associations between PON1-L55M polymorphism and overall cancer risk were identified in all genetic models. In the stratified analyses by cancer type, PON1-L55M polymorphism was a risk factor for breast cancer in all genetic models, prostate cancer in the heterozygote model (ML vs LL: OR =1.304, 95% CI =1.049-1.620, P heterogeneity=0.067), and ovarian cancer in the recessive model (MM vs ML/LL: OR =1.526, 95% CI =1.110-2.097, P heterogeneity=0.464). Similarly, an increased risk was also identified for the Caucasian population in the heterozygote comparison and homozygote models, and hospital-based controls in all genetic models. To sum up, our study suggests that the PON1-L55M allele increased the risk of cancer. Future well-designed studies with larger sample sizes are warranted to further verify these findings.

KEYWORDS:

L55M; Paraoxonase 1; cancer; meta-analysis; polymorphism

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