Artículos de revistas
ANTI-TRYPANOSOMAL ACTIVITY OF 1,2,3,4,6-PENTA-O-GALLOYL-beta-D-GLUCOSE ISOLATED FROM Plectranthus barbatus Andrews (Lamiaceae)
Fecha
2012Registro en:
QUIMICA NOVA, SAO PAULO, v. 35, n. 11, pp. 2229-2232, JUL-AUG, 2012
0100-4042
10.1590/S0100-40422012001100025
Autor
Santos, Roberta T. dos
Hiramoto, Liliane L.
Lago, Joao Henrique G.
Sartorelli, Patricia
Tempone, Andre G.
Pinto, Erika G.
Lorenzi, Harri
Institución
Resumen
MeOH extract from the leaves of Plectranthus barbatus Andrews (Lamiaceae), showed in vitro anti-trypanosomal activity. The bioassay-guided fractionation resulted in the isolation of a gallic acid derivative, identified as 1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG), after thorough NMR and MS spectral analysis. Finally, this compound was tested against trypomastigote forms of T. cruzi and displayed an EC50 value of 67 mu M, at least 6.6-fold more effective than the standard drug benznidazole. This is the first occurrence of PGG in the Plectranthus genus and the first anti-parasitic activity described for PGG in the literature.