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Pubmed ID :11106004
Publication Date : //

A comparison of human immunodeficiency virus type-1 protease inhibition activities by the aqueous and methanol extracts of Chinese medicinal herbs.


The aqueous and methanol extracts of thirty-one herbs traditionally used as anti-fever remedies in China were screened for their in vitro inhibition on human immunodeficiency virus type-1 protease (HIV-1 PR). The activity of recombinant HIV-1 protease was determined by sequence-specific cleavage at the Tyr-Pro bond of the fluorogenic substrate (Arg-Glu(EDANS)-Ser-Gln-Asn-Tyr-Pro-Ile-Val-Gln-Lys(DABCYL)- Arg) or by HPLC anaylsis of the cleavage products after incubation of the enzyme with a synthetic peptide substrate (Acetyl-Ser-Gln-Asn-Tyr-Pro-Val-Val-amide). Among the herbal extracts examined, the aqueous extracts of Prunella vulgaris and Scutellaria baicalensis and the methanol extracts of Woodwardia unigemmata, Paeonica suffruticosa and Spatholobus suberectus elicited significant inhibition (>90%) at a concentration of 200 microg/ml.

Authors : Lam T L , Lam M L , Au T K , Ip D T , Ng T B , Fong W P , Wan D C ,

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