Potent inhibition of replication of primary HIV type 1 isolates in peripheral blood lymphocytes by negatively charged human serum albumins

M. Groenink, P. J. Swart, S. Broersen, M. Kuipers, D. K. Meijer, H. Schuitemaker

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Abstract

We previously reported the antiviral capacity of human serum albumin (HSA), which was modified by the introduction of a single (Suc-HSA) or two carboxylic groups (Aco-HSA) per lysine residue, yielding strongly negatively charged polypeptides. Here we report the antiviral effect of these modified HSAs on replication of primary HIV-1 isolates that differed with respect to syncytium-inducing (SI) capacity and cell tropism. Both Suc-HSA and Aco-HSA potently inhibited replication of primary HIV-1 variants, independent of the SI capacity of the HIV-1 variant, with IC50 values in the range of 50 to 187 microg/ml. The inhibition of the formation of syncytia and the absence of proviral DNA products in cells inoculated with HIV-1 in the presence of Suc-HSA or Aco-HSA pointed to interference at an early level in the virus replication cycle. The inhibitory capacity of Suc-HSA and Aco-HSA on primary HIV-1 variants suggests that these agents are potential candidates for use in antiviral therapy in HIV-infected individuals
Original languageEnglish
Pages (from-to)179-185
JournalAIDS Research and Human Retroviruses
Volume13
Issue number2
DOIs
Publication statusPublished - 1997

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