Objective:To investigate cytotoxicity of breast cancer cell line MCF-7 cells induced by trichostatin A and its possible transcription regulation. Methods:The proliferative activity of MCF-7 cells upon different trichostatin A concentration was accessed by MTT assay, cell apoptosis followed was identified by Annexin-V/PI double staining; cycle alteration was examined by cell cycle analysis in different time, expression status of ERα, myc-c, P21, cyclin-D and Bcl-2 genes was analyzed by RT-PCR. Results:A time and dose dependent inhibition was detected in MCF-7 cells treated with trichostain A. At 48 h treatment, Annexin-V/PI double staining analysis indicated that cell apoptosis rate increased as trichostatin A rose, at 0.5 -滋mol/L treatment, apoptosis rate was 33.82%; Cell cycle analysis showed MCF-7 cells were arrested in cycles after trichostatin A treatment, while almost no apoptosis was evidenced. RT-PCR revealed that except P21 gene,ERα,myc-c,cyclin-D and Bcl-2 were all down regulated,and all made it to proliferative inhibition, cell arrest and apoptosis. Conclusion:Trichostatin A could induce cytotoxicity in MCF-7 cells, and may correlate with transcription regulation.
ZHU Yi-bao,PAN Mei,WEI Qin-jun,CAO Xin.A study on transcription regulation induced by trichostatin A during cytotoxicity on MCF-7 cells[J].,2007,(6):546-549.