Fig. 3From: Interleukin 1 Induces HIV-1 Expression in Chronically Infected U1 Cells: Blockade by Interleukin 1 Receptor Antagonist and Tumor Necrosis Factor Binding Protein Type 1 IL-1Ra blocks IL-1-induced p24 antigen production Ul cells were cultured with different concentrations of IL-1Ra and then stimulated with 50 ng/ml IL-1α (◯) or IL-1β (●). p24 antigen is depicted as the mean ± SD of four samples. §p ≤ 0.001 when comparing U1 cells pretreated with IL-1Ra with cells not treated with IL-1Ra. p < 0.001 using analysis of variance.Back to article page