Inhibitory effect of glycosides like saponin from soybean on the infectivity of HIV in vitro

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Abstract
Soybean saponins isolated from soybean seeds were investigated for their antiviral activity on HIV in vitro, using an HTLV-I-carrying cell line, MT-4. Saponin B1 completely inhibited HIV-induced cytopathic effects and virus-specific antigen expression 6 days after infection at concentrations greater than 0.5 mg/ml. Saponin B2 also inhibited HIV infection, although less potently. Both saponin B1 and B2 had no direct effect on the reverse transcriptase activity of HIV. Saponin B1 also inhibited HIV-induced cell fusion in the MOLT-4 cell system. The results of this study suggest that soybean saponins, especially saponin B1, have inhibitory activity against HIV infection.

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