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- W2391627900 abstract "Objective To investigate the mechanism of ursolic acid-induced apoptosis in human leukemia cells.Methods U937 cells were exposed to ursolic acid(UA) at various concentrations for 6 h and 12 h,or at 20 μmol/L for different time intervals.Cells were stained with Annexin V/PI,and their apoptosis was determined through flow cytometry.Total protein extracts were prepared and subjected to Western blot assay using antibodies against PARP,C-Caspase-3,C-Caspase-9,Mcl-1,Bcl-2,Bcl-xL,Bax,and Bad.Parallel studies were performed in human leukemia cell lines Jurkat and HL-60.Results Exposure of U937 cells to UA resulted in increase in apoptosis in dose and time-dependent manners.We found that UA-induced lethality was associated with Caspase activation and PARP cleavage,and that UA-induced apoptosis was proceeded by the downregulation of Mcl-1.Jurkat and HL-60 leukemia cells in parallel studies exhibited apoptosis after UA exposure similar to those observed in U937 cells,although HL-60 cells were less sensitive than U937 cells in UA-induced apoptosis,PARP degradation as well as Caspases activation.Conclusion UA induces apoptosis in human leukemia cells through a process that involves Mcl-1 downregulation,followed by Caspase activation and PARP degradation." @default.
- W2391627900 created "2016-06-24" @default.
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- W2391627900 date "2009-01-01" @default.
- W2391627900 modified "2023-09-22" @default.
- W2391627900 title "Mechanism of ursolic acid-induced apoptosis in human leukemia cells" @default.
- W2391627900 hasPublicationYear "2009" @default.
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