Interleukin-2 gene polymorphisms and prognosis of breast cancer.
2013
Breast cancer is the most common malignancy in women. Interleukin-2 (IL-2) plays a key role in the proliferation of T cells and natural killer cells. It has been reported that polymorphisms in the IL-2 gene are associated with various cancers. The aim of this study was to examine the effect of polymorphisms in the IL-2 gene on the development of breast cancer in the Chinese population. IL-2-330T/G and +114T/G polymorphisms were assessed in 638 breast cancer cases and 682 age-matched healthy controls. Data were analyzed using the chi-square test. Results showed that individuals with −330TG genotype and −330GG genotype had significantly increased susceptibility to breast cancer (Odds ratio [OR]=1.42, 95% confidence interval [CI]: 1.10–1.79, p=0.0021 and OR=2.26, 95%CI: 1.53–3.30, p<0.0001). The +114T/G polymorphism did not show any correlation with breast cancer. In addition, when analyzing the survival time of breast cancer patients with IL-2-330T/G polymorphism, cases with a −330G allele had significantly...
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