科研之友
微信
新浪微博
Facebook
分享链接
摘要
Objective: In the present study, we investigated the relationship between the single-nucleotide polymorphism (SNP) of caspase-3 rs1049216 (C > T), a miRNA target site, and the risk and progression of cervical cancer. Materials and Methods: Using polymerase chain reactionYrestriction fragment length polymorphism, we evaluated the genotype and distribution of caspase-3 rs1049216 in 515 patients with cervical squamous cell cancer and 415 controls. In additional experiments, we transfected luciferase reporter plasmids carrying Tor C allele and/or miRNA mimics into the human cervical cell lines (HeLa and C-33A) to analyze its roles in the regulation of caspase3 expression. By immunohistochemistry, the protein level of caspase-3 expression was examined in tumor tissues from 515 patients with cervical squamous cell cancer. Results: We found that the TT genotype of caspase-3 rs1049216 conferred a significantly decreased risk of cervical cancer (adjusted odds ratio, 0.35; 95% confidence interval, 0.154Y0.581) and may be associated with the progression of this cancer. Although the expression of caspase-3 in the TT genotypewas higher than that in CC/CT genotype in peripheral blood mononuclear cells and tumor tissues. Additional luciferase analysis showed that the rs1049216 variant T allelewas associatedwith significantly higher luciferase activity, comparedwith the C allele in the transfected cells, andwhen cotransfected with miRNAs, miRNA-181a could downregulate the luciferase activity in the cells that transfected the construct containing C allele, compared with T allele, which had not happened in the presence of other miRNAs selected. Conclusions: These data indicate that through upregulating the expression of caspase-3, the TT genotype of caspase-3 rs1049216 can be associated with not only the risk of cervical cancer but also the progression of this cancer.
- 出版日期2017-2
- 单位河北医科大学; 河北省人民医院
