Document Report Card

ID: ALA1155607

Journal: J Nat Prod

Title: Antigiardial activity of isoflavones from Dalbergia frutescens bark.

Authors: Khan IA, Avery MA, Burandt CL, Goins DK, Mikell JR, Nash TE, Azadegan A, Walker LA.

Abstract: Several isoflavones [formononetin (1), castanin (5), odoratin (6), glycitein (7), pseudobaptogenin (8), fujikinetin (9), and cuneatin (10)] were isolated from Dalbergia frutescens, and their antiprotozoal activities were determined against Giardia intestinalis. Among these compounds, formononetin (1) was the most potent antigiardial agent, with an IC(50) value of 30 ng/mL (approximately 0.1 microM), as compared to the value for metronidazole, the current drug of choice, of 100 ng/mL (approximately 0.6 microM). Three isoflavones closely related to formononetin [daidzein (2), biochanin A (3) and genistein (4)] were also evaluated, but they were at least 100 times less active than 1. Formononetin (1) may thus be an interesting lead for development of new antigiardial agents or as a probe for a new mechanistic target.

CiteXplore: 11076565

DOI: 10.1021/np000010d