Mean fluorescence intensity (MFI) or percentage staining using peripheral blood mononuclear cells from 3 groups of patients.

Each group consisted of 6 patients. Levels of HIV-1 receptors, costimulatory molecules CD28 and CTLA-4, DC markers, and CD91 are shown. The top graph shows the baseline, and the lower one follows incubation with Ba-L supernatant (R5 tropic HIV-1). DCs were defined as cocktail-negative (CD3, CD14, CD16, CD19), HLA-DR–positive cells.