Fig. 4.
Neutralization of endogenous IL-10 during LPS priming completely ameliorates the ET-associated suppression of T-cell IFN-γ production but not the suppression of T-cell proliferation in response to different protein recall antigens.
PBMCs from 2 donors were cultured for the first 24 hours with (2 ng/mL) or without LPS in the presence of either a control murine IgG1 or anti-IL-10 MoAb and recultured with either 2.5 μg/mL candidin (Can), 0.08 IU/mL tetanus toxoid (TT), 5 PPD-S/mL tuberculin (Tbc), or without stimulation. (A) Cellular [5′-3H]thymidine incorporation after 3 days of antigen stimulation is given from experiments in triplicate assays (mean ± SEM). (B) IFN-γ production after 4 days of antigen stimulation was assessed by ELISA.