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- W2005756701 abstract "BACKGROUND The relative amounts of Bcl-2 and Bax proteins determine cell survival or death following an apoptotic stimulus. To clarify the molecular mechanism of cell death after radiotherapy or thermoradiotherapy and its relation to the response of AJCC/UICC Stage IIIB cervical carcinomas, the expression of Bax and Bcl-2 proteins was investigated both before and in the course of treatment given during this study. METHODS Thirty-seven patients with Stage IIIB carcinoma of the uterine cervix were treated with external beam irradiation to the pelvis combined with iridium-192 high-dose-rate intracavitary brachytherapy. All patients were randomized to one of the following two groups: the radiotherapy (RT) group of 19 patients who were given radiotherapy alone, and the thermoradiotherapy (TRT) group of 18 patients who were given 3 sessions of hyperthermia in addition to RT. Specimens of the cervical tumors were obtained by punch biopsy both before and in the course of the treatment (after a total dose of 10.8 grays [Gy] for the RT group or after 10.8 Gy plus 1 session of hyperthermia for the TRT group). The tumor sections were stained with anti-Bax and anti-Bcl-2 monoclonal antibody. On the basis of the percentage of immunopositive cells, both pretreatment and posttreatment samples were scored. Furthermore, relative changes in protein expression were determined by comparing the pretreatment scores with those in the course of treatment. In addition, treatment response was evaluated. RESULTS A complete response was achieved in 52.6% (10 of 19) of the RT group versus 83.3% (15 of 18) of the TRT group (P = 0.049). Better tumor control was accompanied by increased Bax expression, i.e., 10.5% (2 of 19) of the RT group versus 44.4% (8 of 18) of the TRT group (P = 0.02). The respective number of patients who partially responded (PR) or did not respond to treatment (NC) was 26.3% (5 of 19) and 21.1% (4 of 19) of the RT group versus 11.1% (2 of 18) and 5.6% (1 of 18) of the TRT group (P = 0.2 for both the PR and NC subgroups). CONCLUSIONS TRT was found to result in better treatment responses than RT for patients with Stage IIIB cervical carcinoma. An additive or synergistic antitumor effect of TRT is likely to occur through induction of apoptosis involving one of the bax pathways. Cancer 2000;88:132–8. © 2000 American Cancer Society." @default.
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- W2005756701 title "Bax and Bcl-2 protein expression following radiation therapy versus radiation plus thermoradiotherapy in stage IIIB cervical carcinoma" @default.
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- W2005756701 doi "https://doi.org/10.1002/(sici)1097-0142(20000101)88:1<132::aid-cncr18>3.0.co;2-h" @default.
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