Dose-dependent effect of natural and synthetic compounds on uninfected and HIV-1 chronically infected cell viability. Promonocytic (U937 and U1) and lymphocytic cells (H9 and H9+) were treated with different concentrations of each compound for 48 h and cell viability was determined by measuring the exclusion of Trypan blue. Results were expressed as the percentage of total number of viable cells in the presence of the tested compound with respect to untreated cells. Data represent means ± SD from three separate experiments.
