Antimalarial activity of Tanzanian plants and their active constituents: the genus Uvaria.

Autor: Nkunya MH; Department of Chemistry, University of Dar es Salaam, Tanzania., Weenen H, Bray DH, Mgani QA, Mwasumbi LB
Jazyk: angličtina
Zdroj: Planta medica [Planta Med] 1991 Aug; Vol. 57 (4), pp. 341-3.
DOI: 10.1055/s-2006-960113
Abstrakt: Petroleum ether, dichloromethane, and methanol extracts of leaves, stem, and root bark of nine Uvaria species: U. dependens, U. faulknerae, U. kirkii, U. leptocladon, U. lucida ssp. lucida, Uvaria sp. (Pande)k U scheffleri, and U. tanzaniae were tested for their in vitro activity against the multidrug resistant K1 strain of Plasmodium falciparum. The IC50 values of the extracts varied between 5 and 500 micrograms/ml. The most active extracts were obtained from the stem and root bark of U. lucida ssp. lucida and Uvaria sp. (Pande) and the root bark of U. scheffleri, all of which had IC50 values between 5 and 9 micrograms/ml. Among the compounds isolated, uvaretin, diuvaretin, and (8',9'-dihydroxy)-3-farnesylindole were the most active (IC50 = 3.49, 4.20, and 2.86 micrograms/ml, respectively).
Databáze: MEDLINE