Figure 3.
Peptide 3 inhibition of HIV infectivity in vitro. (a) HIV (IIIb) replication in cultures of Jurkat T-cells was estimated by measuring the supernatant reverse transcriptase activity two weeks after infection. Peptide 3 was at 100 μM final concentration and SDF-1α was added at 100 ng/ml final concentration 1 hour prior to exposure to virus. Values are mean ± SEM from 12 wells, expressed as the percentage of the reverse transcriptase activity in the supernatant from the control wells. The experiment shown is typical of six separate experiments. (b) HIV (IIIb) infectivity of Jurkat T-cells was estimated by staining cells treated identically to those in (a) for p24gag expression. Values are mean ± S.D. percentage of cells stained for p24gag averaged from 12 fields of view from each of two separate wells. (c) HIV (MN) infectivity of THP-1 cells measured as in (b). MIP1α and SDF1α were used at 100 ng/ml final concentration.