Bax protein, the proapoptotic member of Bcl-2 protein family, plays the key role in apoptosis pathway.
<bold>The aim of the study</bold> was to assess the expression of Bax protein in breast cancer cells.
<bold>Material and methods.</bold> Sixty-two breast cancer patients were included in the study. The control group encompassed 11 fibroadenoma patients. Single cells were isolated from defrosted samples and prepared for flow cytometry measurement.
<bold>Results.</bold> Median expression of Bax protein in study group was 7.9% (range: 0-49.4%) and was significantly lower than in control (median expression 15.8%; range 4.9-30.9%; p=0.034). Expression of Bax correlated with expression of p53 and caspase-3 proteins (p<0,01, rank Spearman test). In patients under 70 years old and with positive estrogen receptors status the expression of Bax protein was significantly higher (p=0.03 and p=0.01 respectively).
<bold>Conclusions.</bold> Lower expression of Bax protein in breast cancer cells may suggest the potential way of apoptosis avoidance of tumor cells. Correlations among Bax protein, p53 and caspase-3 are likely associated with active apoptotic mechanism in breast cancer cells expressing Bax protein. Further investigation with long time follow-up should be performed to establish the prognostic role of Bax protein expression in breast cancer patients.
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SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.