Our previous studies showed that the alcohol extract of the fruit of Brucea javanica (Fructus Bruceae) possessed significant cytotoxicity in pancreatic adenocarcinoma cell lines. A bioassay-guided fractionation and purification resulted in the isolation and characterization of seven quassinoids including brusatol, bruceine D, bruceine H, yadanzioside A, yadanzioside G, javanicoside C and bruceantinoside A. Among them, brusatol exhibited the most potent in vitro antipancreatic cancer action, with IC(50) values of 0.36 µm and 0.10 µm on PANC-1 and SW1990 cell lines, respectively. This is the first report on the antipancreatic adenocarcinoma activity of brusatol.
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