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Objective:To investigate the expressions of p53,RB1,Fas,c-fos,Ras,EGFR mRNA in human cervical cancer (HeLa) cell in response to the trichostatin A (TSA).Methods:We took count of HeLa cells in different incubation times with TSA (0.2 IJm/L).The result indicated that HeLa cells changed evidently when HeLa cells were incubated for 36 h.Then,we investigated the genes expression (mRNA levels) of HeLa cells after treatment for 36 h using SYBR green real-time PCR.Results:We demonstrated that trichostatin A (TSA) could make human cervical cancer (HeLa) cell morphological change and induce HeLa cell apoptosis.Furthermore,the data suggest that TSA-induced down-regulation of p53,RB1,Fas,but upregulated c-fos gene expression after treatment for 36 h,and Ras,EGFR did not show obvious response to TSA treatments.Conclusion:TSA has different effects on gene expression.