Abstract
HIV-1 integration into cell genomes is a key step in the HIV-1 replicative cycle. We applied a gene therapy strategy designed to block HIV replication at this early stage. To do this, we used a single chain antibody (SFv) against the DNA-binding domain of HIV-1 integrase (IN). SV40-derived vectors were used for gene transfer to human T-lymphocytes because of their high transduction efficiency and durability of transgene expression. HIV-1 replication was measured by supernatant p24 antigen levels. Protection by the test vector, SV(Aw), compared with mock- and SV(HBS) transduced cells used as negative controls, was assessed during 3 successive rounds of HIV-1 NL4-3 challenge. HIV-1 infectious dose escalated from 400 infectious units (IU) to 4000 IU.
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