Prostratin induction of HIV-1 expression from U1 cells.

U1 cells were treated with 0.1, 0.3, 0.9, and 2.7 μM PMA or prostratin. Culture media was removed from days 1 through 4 after treatment and assessed for the levels of p24 antigen by ELISA. Each point represents the mean of 2 trials ± 1 SD.