Inhibitory effect of glycyrrhizin on the in vitro infectivity and cytopathic activity of the human immunodeficiency virus [HIV (HTLV-III/LAV)].


Glycyrrhizin (GL), one of the plant extracts, was investigated for its ...
Glycyrrhizin (GL), one of the plant extracts, was investigated for its antiviral action on the human immunodeficiency virus [HIV (HTLV-III/LAV)] in vitro, using cytopathic effect and plaque forming assay system in MT-4 cells (a HTLV-I-carrying cell line). Cloned Molt-4 cells (clone No. 8), which are sensitive to HIV and fuse to giant cells after infection, were also used as a parameter for cytopathic effect of HIV. GL completely inhibited HIV-induced plaque formation in MT-4 cells at a concentration of 0.6 mM, the 50% inhibitory dose being 0.15 mM. GL completely inhibited the cytopathic effect of HIV and the HIV-specific antigen expression in MT-4 cells at a concentration of 0.3 and 0.6 mM, respectively. Furthermore, GL inhibited giant cell formation of HIV-infected Molt-4 clone No. 8 cells. GL had no direct effect on the reverse transcriptase of HIV. Its mechanism of anti-HIV action remains to be elucidated.




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