Differential transcription of Bcl-2 and Bax through the cell cycle in prostate cancer cell line / 中华外科杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the differential expression of apoptosis associated gene Bcl-2 and Bax through cell cycle and its possible clinical meaning.</p><p><b>METHODS</b>The prostate cancer cell line PC-3 was synchronized in M, G1, S and G2 phase using modified thymine deoxyriboside blockage and high pressure N2O technique. The efficiency of synchronization was detected by flow-cytometry. RT-PCR and Western blot methods were used to examine the expression of Bcl-2 and Bax in mRNA and protein level.</p><p><b>RESULTS</b>The synchronized rate of M, G1, S and G2 phase were 92.1%, 87.0%, 80.2% and 75.9% respectively. Bcl-2 was constitutively expressed through the cell cycle, but both the mRNA and protein expression level of Bcl-2 were very high in the G1 phase, dramatically decreased in M, S and G2 phase. The expression level of Bax had no change through the cell cycle.</p><p><b>CONCLUSIONS</b>Cell cycle could influence the expression level of Bcl-2 significantly but not Bax, these might have some clinical relevance.</p>