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Aim:The cytotoxic activities of a series of bis-aziridinylnaphthoquinone,AZ1 toAZ4,on human lung carcinoma cell lines,H460,and normal lung cells fibroblastcell line,MRC-5,and the mechanisms of H460 cells induced by AZ4 wereinvestigated.Methods:The MTT assay was used to determine the cellproliferation.Cell cycle was analysed by FACS.The activity of caspase 3,8 and 9was determined by cell-permeable fluorogenic detection system.Western blotassay was used to evaluate the regulation of cyclin B,Cdc-2,p53,p21,and the Bcl-2 protein.Results:AZ1 to AZ4 displayed various cytotoxicity activities againstH460 and MRC-5 cells.Compared to those compounds,AZ4 was with the mosteffective agent among the 5 tested analogues at reducing H460 cell viability with anIC_(50) value of 1.23 μmol/L;it also exhibited weak cytotoxicity against MRC-5 cells withan IC_(50) value of 12.7 μmol/L.The results show that growth arrest on the G_2-M phaseof H460 cells induced by AZ4 for 24 h was discovered,and this might be alteredwith the reduced Cdc-2 protein expression of 47% at 2.0 μmol/L AZ4,but not withcyclin B protein expression.The AZ4 treated cells were then led to apoptosis after48 h.This was associated with the activation of apoptotic enzyme caspase 3 andmediated by caspase 8,but not caspase 9 at various concentrations of AZ4 afterbeing cultured for 48 h and 30 h,respectively.The anti-apoptotic protein (Bcl-2)expression in H460 cells altered by 39% with downregulation,and the p53 proteinby 25% with upregulation after being cultured with 2.0 μmol/L AZ4 for 48 h.In atime-dependent wanrer,the expression of the p53 and p21 proteins were increasedto the maximum at 24 h,and then decreased at 48.Conclusion:AZ4 represents anovel antitumor aziridinylnaphthoquinone with therapeutic potential against thenon-small cell lung cancer cells.
Aim: The cytotoxic activities of a series of bis-aziridinylnaphthoquinone, AZ1 to AZ4, on human lung carcinoma cell lines, H460, and normal lung cells fibroblast cell line, MRC-5, and the mechanisms of H460 cells induced by AZ4 were investigated. The MTT assay was used to determine the cell proliferation assay. Cell cycle was analyzed by FACS. The activity of caspase 3, 8 and 9 was determined by cell-permeable fluorogenic detection system. Western blot assay was used to evaluate the regulation of cyclin B, Cdc-2, p53, p21, and the Bcl-2 protein. Results: AZ1 to AZ4 displayed various cytotoxicity activities against H460 and MRC-5 cells. Compared to these compounds, AZ4 was with the mosteffective agent among the five tested analogues at reducing H460 cell viability with an IC_ (50) value of 1.23 μmol / L; it also showed weak cytotoxicity against MRC-5 cells withan IC 50 value of 12.7 μmol / L.The results show that growth arrest on the G_2-M phase of H460 cells induced by AZ4 for 24 h was discovered, and this might be alteredwith the reduced Cdc-2 protein expression of 47% at 2.0 μmol / L AZ4, but not with cyclin B protein expression. The AZ4 treated cells were then led to apoptosis after 48 h. This was associated with the activation of apoptotic enzyme caspase 3 and mediated by caspase 8, but not caspase 9 at various concentrations of AZ4 after beating cultured for 48 h and 30 h, respectively. The anti-apoptotic protein (Bcl-2) expression in H460 cells altered by 39% with downregulation, and the p53 protein by 25% with upregulation after being cultured with 2.0 μmol / L AZ4 for 48 h. In a time-dependent wanrer, the expression of the p53 and p21 proteins were increased to the maximum at 24 h, and then decreased at 48. Conlusion: AZ4 represents an ovel antitumor aziridinylnaphthoquinone with therapeutic potential against thenon-small cell lung cancer cells.