Fig. 4. Transient interference with the expression of CTCF mRNA reverses the HIV-1 resistant phenotype in HRF(+) cells.
HRF(+) and HRF(-) cells were transfected by CTCF or control Litmus siRNA fragments then challenged with NL4-3 HIV-1 at concentration of 0.5pg/cell. Replication of HIV-1 was tested by RT-PCR of the single-spliced vif transcript (A); detection of the p24 core antigen (B); biological activity of cell culture supernatants was tested by RSA (C). Data presented in this figure show one of the three separate experiments.