IL10 neutralization does not impair the actions of adiponectin in human macrophages stimulated with TNFα or IL6. A, cells were incubated with (lanes 3–6) or without (lanes 1 and 2) 10 μg/ml adiponectin for 18 h in the presence of anti-IL10 antibody (lane 5) or control IgG (lane 6) and subsequently stimulated with 50 ng/ml TNFα or left unstimulated for 10 min. Whole-cell lysates were fractionated by SDS-PAGE and immunoblotted with antibodies to phospho-IκB (top), phospho-JNK (middle), or phospho-p38 (bottom). Actin, total JNK, and total p38 served as loading controls, respectively. B, cells were incubated with (lanes 3–6) or without (lanes 1 and 2) 10 μg/ml adiponectin for 18 h in the presence of anti-IL10 antibody (lane 5) or control IgG (lane 6) and subsequently stimulated with 5 ng/ml IL6 or left unstimulated for 40 min. Whole-cell lysates were fractionated by SDS-PAGE and immunoblotted with antibodies to phospho-STAT3. Total STAT3 served as loading control.