1-Oleoyl-2-acetylglycerol promotes immunoglobulin production independent of cell proliferation in human peripheral blood mononuclear cells.

1-Oleoyl-2-acetylglycerol (OAG) stimulated IgG and IgM production in a dose-dependent manner in human peripheral blood mononuclear cells (PBM) but not PBM proliferation. 12-O-Tetradecanoyl phorbol-13-acetate (TPA) did not stimulate Ig production. OAG did not stimulate an increase in IL-2 generation or IL-2 receptor expression. H-7, a protein kinase C blocker completely inhibited OAG-stimulated Ig production. The results suggest that OAG stimulation of Ig production is independent of cell proliferation; a generalized increase in T-cell activation does not appear to be necessary in the OAG stimulation of Ig production. Finally, PBMs respond differently to OAG and TPA although both are protein kinase C activators.