CLDN10 single nucleotide polymorphism rs1325774 alters the risk of breast cancer in south chinese women

Breast cancer is one of the most widespread malignancies in females, and the incidence rate has been increasing in recent years in the world. Genetic factors play an important role in the occurrence of breast cancer. Our study aimed to investigate the relationship between single nucleotide polymorphisms (SNPs) of claudin 10 (CLDN10) (rs1325774, rs7333503, rs3751334) and breast cancer and the clinical characteristics of patients. A total of 104 patients with breast cancer and 118 healthy controls were recruited in our study between 2013 and 2015. The SNPscan system was used for genotyping. Demographic information, health status, anthropometric parameters and clinical data were considered in analysis. Statistical analysis of the data was carried out using the Student t test, the Chi-square test (X2) or Fisher exact test and unconditional logistic regression analysis. The Gene Expression Profiling Interactive Analyses application (GEPIA) was used to analysis the expression of CLDN10 in breast cancer tissues and normal samples. The polymorphism of rs1325774 was significantly associated with an increased risk of breast cancer (T/G vs T/T: OR = 2.073, 95% CI = 1.095–3.927, P = .025). After adjusting for age, the association remained statically significant (T/G vs T/T: OR = 2.067, 95% CI = 1.070–3.867, P = .026). Furthermore, harbouring G allele in rs1325774 position was significantly associated with increased risk of breast cancer (OR = 1.993, 95% CI = 1.107–3.589, P = .022). However, no significant association among rs7333503, rs3751334, and breast cancer. The expression level of CLDN10 was reduced in breast cancer tissues compared with normal breast tissues according to the analysis of The Cancer Genome Atlas (TCGA) data through GEPIA. Our results suggest that the polymorphism of rs1325774 associate with increase the breast cancer risk. No significant relationship between rs1325774 polymorphism and clinical as well as pathological characteristics in patients.