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  • Title: Antiangiogenic effects and mechanisms of trans-ethyl p-methoxycinnamate from Kaempferia galanga L.
    Author: He ZH, Yue GG, Lau CB, Ge W, But PP.
    Journal: J Agric Food Chem; 2012 Nov 14; 60(45):11309-17. PubMed ID: 23106130.
    Abstract:
    Kaempferia galanga L. (Zingiberaceae) is an aromatic herb and a popular spice used as a condiment in Asian cuisine. The ethanol extract of the dried plant and its successive four subfractions were investigated on zebrafish model by quantitative endogenous alkaline phosphatase assay. Both n-hexane and ethyl acetate fractions had antiangiogenic activity, and two major active components (trans-ethyl p-methoxycinnamate and kaempferol) showed potent antiangiogenic effects on wild-type zebrafish. Because of its much stronger effect and no antiangiogenic activity reported, trans-ethyl p-methoxycinnamate was further investigated for its action mechanism. It dose dependently inhibited vessel formation on both wild- and Tg(fli1a:EGFP)y1-type zebrafish embryos. The semiquantitative reverse transcription polymerase chain reaction assay suggested that trans-ethyl p-methoxycinnamate affects multiple molecular targets related to angiogenesis. In vitro, it specifically inhibited the migration and tube formation of human umbilical vein endothelial cells. In vivo, it could block bFGF-induced vessel formation on Matrigel plug assay.
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