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J Korean Breast Cancer Soc. 1999 Dec;2(2):211-220. Korean. Original Article.
Kim WH , Yoon JH , Jaegal YJ , Park CS .
Department of Surgery, Chonnam Medical School, Kwang-Ju, Korea.

It is deirable to identify the tumoric factors anticipating the therapeutic failure in breast cancer patients received postoperative adjuvant chemotherapy. So, we studued the tumoric topoisomerase II alpha enzyme, c-erbB-2 oncoprotein, and Pgp expression in breast cancer tissues to identify the roles of these factors as the predictors of chemotherapeutic result. The results were as follows. 1) There wee no significant differences in the average value of topoisomerase II alpha enzyme, c-erb B-2 oncoportein overexpression, and Pgp expression according to stages. 2) CAF chemotherapy was suggested to be more effective than CMF chemotherapy in more advance stages. 3) There was a possible suggestion that the breast cancer with high topoisomerase II alpha enzyme activity might indicate the failure with CMF chemotherapy. 4) C-erbB-2 oncoportein overexperession suggested the possibility of therapeutic failure with CMF chemotherapy and the selection of CAF chemotherapy might improve the survival of advanced breast cancer patients with c-erbB-2 overexpression. In conclusion, it was suggested that c-erb-2 oncopotein overexpression and high topoisomerase II alpha activity might have a meaningful role in the selection of proper chemotherapeutic regimen in setting of adjuvant chemotherapy and predict the therapeutic failure of some chemotherapeutic agents for breast cancer. An expanded study for these factors is required to reveal the clinical significance in chemotherapy for breast cancer patients.

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