Screening of Traditional Medicines for their Inhibitory Activity Against HIV‐1 Protease

Aqueous extracts of 75 different traditional medicines, currently used for the treatment of various human diseases in China, Japan and Indonesia, were screened for possible inhibitory activity against HIV‐1 protease using fluorogenic assay. Forty extracts exhibited inhibitory activity at a concentration of 250 μg/mL, and 18 of them inhibited HIV‐1 protease activity by more than 70%. Among the extracts examined, Belamcanda chinensis, Magnolia fargesii, Paeonia suffruticosa, Phellodendron amurense and Terminalia chebula were also effective at a concentration of 25 μg/mL in the fluorogenic assay.