Effect of lymphokines on beta-adrenoceptor stimulation of human PBMC.

The effect of IL-2, IL-3, IL-4 and GM-CSF on beta-adrenoceptor function of human peripheral blood mononuclear cells (PBMC) was studied. After a 2 h pre-incubation period of PBMC with each of the lymphokines (1-100 units/ml), the isoprenaline stimulated cAMP production in these cells was not altered. However, IL-2 and GM-CSF induced a concentration dependent decrease of the beta-adrenoceptor agonist stimulated cAMP production after a 20 h pre-incubation period.