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  • Title: Antiplasmodial phenolic compounds from Piptadenia pervillei.
    Author: Ramanandraibe V, Grellier P, Martin MT, Deville A, Joyeau R, Ramanitrahasimbola D, Mouray E, Rasoanaivo P, Mambu L.
    Journal: Planta Med; 2008 Mar; 74(4):417-21. PubMed ID: 18484535.
    Abstract:
    Piptadenia pervillei Vatke (Fabaceae) was selected from a screening programme devoted to the search of naturally-occuring antimalarial compounds from plants of Madagascar. Bioassay-guided fractionation of the ethyl acetate extract of the leaves led to the isolation of four phenolic compounds, (+)-catechin ( 1), (+)-catechin 5-gallate ( 2), (+)-catechin 3-gallate ( 3) and ethyl gallate ( 4). Structures were determined by NMR and mass spectroscopy. Compounds 2 and 3 displayed the highest in vitro activity against the chloroquine-resistant strain FcB1 of Plasmodium falciparum with IC (50) values of 1.2 microM and 1.0 microM, respectively, and no significant cytotoxicity against the human embryonic lung cells MRC-5 was measured (IC (50) values > 75 microM). Five analogues ( 5 - 9) of (+)-catechin 5-gallate ( 2) were synthesized and evaluated for their antiplasmodial activity.
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