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  • Title: In vitro anti-HIV potency of stampidine alone and in combination with standard anti-HIV drugs.
    Author: Uckun FM, Qazi S, Venkatachalam TK.
    Journal: Arzneimittelforschung; 2005; 55(4):223-31. PubMed ID: 15901046.
    Abstract:
    The purpose of the present study was compare the in vitro anti-HIV potency stampidine (CAS 217178-62-6), a novel aryl phosphate derivative of stavudine (CAS 3056-17-5), and drug combinations containing stampidine to the anti-HIV tency of the standard drugs zidovudine (CAS 30516-87-1), stavudine, lamivudine (CAS 134678-17-4), nelfinavir (CAS 159989-65-8), and nevirapine (CAS 129618-40-2) as well as their combinations. Stampidine inhibited the laboratory HIV-1 strain HTLV(IIIB) (B-envelope subtype) as well as the primary clinical HIV-1 isolates BR/92/025 (C-envelope subtype) and BR/93/20 (F-envelope sub-type) with subnanomolar IC50 values. Stampidine was as effective as zidovudine against HTLV(IIIB) and BR/92/025 and 3-logs more effective than zidovudine against BR/93/20. Stampidine was more effective than stavudine, lamivudine, nelfinavir, and nevirapine against all three HIV-1 isolates. The combination of stampidine with zidovudine + lamivudine was more effective than the combination of nelfinavir or nevirapine with zidovudine lamivudine against all three HIV-1 isolates. The combination of stampidine with nelfinavir was more effective than zidovudine + lamivudine as well as the combination of zidovudine + lamivudine with nelfinavir. The combination of stampidine with lamivudine + nelfinavir was more effective than the combination of zidovudine with lamivudine + nelfinavir. The combination of stampidine with lamivudine + nevirapine was more effective than the combination of stavudine with lamivudine + nevirapine. These findings demonstrate that (a) stampidine, as well as its combinations with the standard anti-HIV drugs zidovudine, lamivudine, nelfinavir or nevirapine, are potent inhibitors of HIV-1 replication in human peripheral blood mononuclear cells, and (b) replacement of either zidcovudine, zidovudine+lamivudine or stavudine in 3-drug cocktails with stampidine resulted in greater anti-HIV potency in vitro.
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