Association of CYP2C19 Polymorphisms with Survival of Breast Cancer Patients Using Tamoxifen: Results of a Meta-analysis

作者：Bai, Lan; He, Juan; He, Gong Hao; He, Jian Chang; Xu, Fan; Xu, Gui Li^*

来源：Asian Pacific Journal of Cancer Prevention, 2014, 15(19): 8331-8335.

DOI：10.7314/APJCP.2014.15.19.XXXX

• Breast cancer
• CYP2C19*2
• CYP2C19*17
• survival
• tamoxifen
• meta-analysis

Background: Previous studies accessing the association of CYP2C19 with outcomes of patients using tamoxifen for breast cancer have yielded conflicting results. The aim of this meta-analysis is to obtain a more precise estimate of effects of CYP2C19 polymorphisms and to clarify their effects on survival of the breast cancer patients using tamoxifen. Materials and Methods: A systematic search of PubMed and Embase was performed, comparing patients with or without CYP2C19*2 and CYP2C19*17, relevant articles searched for. The following outcomes were included from the eligible studies: disease-free survival (DFS) and overall survival (OS), expressed by hazard ratios (HR) with corresponding 95% confidence interval (CI). Subgroup analysis by genotypes was also performed. Pooled estimates were calculated using random-effect model in accordance to the heterogeneity. Results: Six studies met the inclusion criteria. The integrated OR on the association between CYP2C19 and DFS, calculated by the random-effect model, was 0.54 (95% CI=0.34-0.84, p=0.013). Subgroup analysis showed that both CYP2C19*2 and CYP2C19*17 were associated with increased survival. The pooled results of two studies for OS were OR=0.46 (95% CI=0.21-1.01, p=0.233). Conclusions: This meta-analysis suggests that the CYP2C19*2 and CYP2C19*17 genotypes are associated with increased survival in breast cancer patients using tamoxifen.

• 出版日期2014
• 单位成都军区昆明总医院; 广西壮族自治区人民医院