Farnesyl protein transferase and tumor cell growth inhibitory activities of lipiferolide isolated fromLiriodendron tulipifera
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The methanolic extract of the leaves ofLiriodendron tulipifera was found to show inhibitory activity towards farnesyl protein transferase (FPTase). Bioassay-guided fractionation of the methanolic extract resulted in the isolation of lipiferolide, an inhibitor of FPTase. This compound inhibited the FPTase activity in a dose-dependent manner, and showed cell growth inhibitory activity against several tumor cells.