Expressions of steroid sulfatase in breast cancer tissues and normal breast tissues and its significance
10.3781/j.issn.1000-7431.2010.01.013
- VernacularTitle:类固醇硫酸酯酶在乳腺癌和正常乳腺组织中的表达及其意义
- Author:
Zhisong FAN
;
Hui ZHANG
;
Wei LIU
;
Zhonglin FAN
;
Yudong WANG
;
Yong CHEN
;
Cuizhi GENG
;
Haiping LI
;
Yunjiang LIU
;
Yueping LIU
;
Xiaoling WANG
- Publication Type:Journal Article
- Keywords:
Breast neoplasms;
Sulfatases;
Estrogens;
Immunohistochemistry;
Steroid sulfatase
- From:
Tumor
2010;(1):62-67
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the mRNA and protein expressions of steroid sulfatase (STS) in breast cancer tissues and normal breast tissues, and analyze its relationship with clinicopathologic characteristics. Methods:The mRNA and protein expressions of STS, in 40 cases of breast cancer tissues and corresponding paracancerous normal breast tissues, were examined by reverse transcription-polymerase chain reaction(RT-PCR)and immunohistochemistry. The correlation of STS expression level with clinicopathologic characteristics was analyzed. Results:STS protein was mainly expressed in the cytoplasm of breast carcinoma cells and epithelial cells in normal breast glands, but not in the stroma. It could be detected in the nucleus of carcinoma cells in 3 cases of breast cancer tissues, which was pathologically classified as invasive ductal carcinoma, invasive lobular carcinoma, and invasive micropapillary carcinoma. STS was not observed in interstitial tissues of breast glands. STS protein expression had positive correlation with its mRNA expressing level. The positivity of STS was 70.0% in breast cancer tissues, significantly higher than that of normal breast tissues (42.5%). The difference was significant (P =0.013). Stratified analysis showed that the positive rates of STS protein were significantly higher in premenopausal patients, the patients with lymph node metastasis, and those with advanced breast carcinoma than those in the matched normal breast tissues (P<0.05). Conclusion:Breast cancer tissues highly expressed STS protein to stimulate local estrogen production, thereby enhancing the progression and migration of breast cancer cells. In addition, as the tumor growth, locally biosynthesized estrogens may play more and more important roles.
