Sh. Park et al., Costunolide, a sesquiterpene from the stem bark of Magnolia sieboldii, inhibits the RAS-farnesyl-proteintransferase, PLANTA MED, 67(4), 2001, pp. 358-359
Costunolide, a germacrane sesquiterpene lactone isolated from the stem bark
of Magnolia sieboldii demonstrated a significant inhibition upon the farne
sylation process of human lamin-B by farnesyl-proteintransferase (FPTase),
in a dose dependent manner in vitro (IC50 value was calculated as 20 muM).
It was also found to exhibit an inhibition upon the proliferation of cultur
ed human tumor cells, i.e., A549 (non small cell lung), SK-OV-3 (ovary), SK
-MEL-2 (melanoma), XF498 (central nerve system) and HCT-15 (colon), in vitr
o.