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Correlations of bcl-2 expression with clinicopathological features in breast cancer

 Hy De Lee  ;  Ja Yun Koo  ;  Woo Hee Jung 
 YONSEI MEDICAL JOURNAL, Vol.38(4) : 206-211, 1997 
Journal Title
Issue Date
Breast Neoplasms/metabolism* ; Breast Neoplasms/pathology* ; Carcinoma in Situ/metabolism* ; Carcinoma in Situ/pathology* ; Carcinoma, Ductal, Breast/metabolism* ; Carcinoma, Ductal, Breast/pathology* ; Female ; Humans ; Middle Aged ; Proto-Oncogene Proteins c-bcl-2/metabolism* ; Receptors, Estrogen/metabolism ; Receptors, Progesterone/metabolism
To evaluate the prognostic significance of bcl-2, we investigated the correlation of bcl-2 expression with the established indicators of prognosis and tumor behavior in breast cancer. This study included a patient group of 91 histologically diagnosed female breast carcinomas. To determine the bcl-2 immunoreactivity, we used a monoclonal antibody directed against the bcl-2 protein by immunohistochemistry from paraffin-embedded tissue in a series of 91 women with breast cancer. Interpretable DNA histograms were obtained from 84 patients. The median age at diagnosis was 45.5 years and the median follow-up time was 30.5 months. Forty-eight (52.7%) cancers showed the bcl-2 immunoreactivity in the cytoplasm. The nonneoplastic portion of ductal epithelial cells and normal lymphocytes were usually stained with bcl-2 antibody. Estrogen receptors (ER)(p < 0.001) and progesterone receptors (PR)(p < 0.001) showed strong positive correlation with bcl-2 immunoreactivity. The histologic grade (p < 0.05) and nuclear grade (p < 0.01) also showed positive relationships with bcl-2 positivity but tumor size (p > 0.05) and DNA ploidy (p > 0.05) were not related with it. The bcl-2 positive patients showed longer survival (p < 0.05) compared to bcl-2 negative tumors in univariate analysis (Kaplan-Meier life table analysis). Using multivariate analysis with Cox regression, bcl-2 (p > 0.05), nuclear grade (p > 0.05), ER status (p > 0.1) and PR status(p > 0.1) were not reliable indicators for overall survival except histologic grade (p < 0.05). Our results suggest that bcl-2 expression may be related to hormonal regulation and tumor differentiation in breast carcinoma. Larger patient study groups with a longer follow-up period will be helpful to clarify the prognostic significance of bcl-2.
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1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
Yonsei Authors
Jung, Woo Hee(정우희)
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