1999 Volume 63 Issue 6 Pages 1130-1133
Phenylahistin is a new cell cycle inhibitor produced by Aspergillus ustus. Since phenylahistin was produced as a scalemic mixture of (-)-phenylahistin and its enantiomer, we separated each enantiomer and evaluated their antitumor activity in vitro. (-)-Phenylahistin exhibited antitumor activity against 8 tumor cell lines with IC50 values ranging from 1.8×10-7 to 3.7×10-6, while (+)-phenylahistin exhibited 33-100-fold less potent activity than (-)-phenylahistin did. (-)-Phenylahistin also showed antitumor activity against P388 leukemia and Lewis lung carcinoma cells in vivo.
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