Abstract
Four inhibitors of polyamine biosynthetic pathways were tested for their effect on HIV-1 replication in phytohemagglutinin-stimulated human peripheral blood mononuclear cells. Methyl acetylenic putrescine (MAP) and alpha-monofluoromethyldehydroornithine methyl ester, irreversible inhibitors of ornithine decarboxylase, inhibited the production of p24 antigen in phytohemagglutinin-stimulated peripheral blood mononuclear cells by clinical HIV-1 strains isolated from HIV-infected patients with IC(50) values of about 1-2 &mgr;M. 5'--5'-deoxyadenosine (MDL 73811), an enzyme-activated irreversible inhibitor of S-adenosyl-L-methionine (AdoMet) decarboxylase, also inhibited the production of p24 antigen by HIV-1 strains in peripheral blood mononuclear cells with IC(50) values of 1-2 &mgr;M. The least potent was 1-aminoxyethylamine which is another inhibitor of AdoMet decarboxylase. MAP showed the best therapeutic index of 500-1,000. Copyright 1996 S. Karger AG, Basel
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