title: The role of calcium in stimulation of activated T lymphocytes with interleukin 2.
abstract: In a study of the role of Ca++ in the stimulation of activated T lymphocytes with interleukin 2 (IL-2) it was found that IL-2-induced proliferation can occur independently of extracellular calcium. Further, there was no correlation between triggering of DNA synthesis and an increase in free cytoplasmic calcium. However, IL-2 induced an increased uptake of 45Ca++ from the extracellular medium. Since there is no increase in free cytoplasmic calcium, it must be assumed that this is caused by an increase in membrane-associated calcium. Further, the calcium channel-blocking agent, verapamil, and TMB-8, a putative inhibitor of mobilization of calcium from intracellular pools, both exerted a dose-dependent inhibition of IL-2-induced DNA synthesis in activated T lymphocytes. We conclude that calcium is not a second messenger in activated T lymphocytes stimulated by IL-2, but our results indicate that calcium may play a role at membrane level.
mesh_terms: D000001:Calcimycin / Q000494:pharmacology; D002118:Calcium / Q000032:analysis / Q000502:physiology*; D002478:Cells, Cultured; D004533:Egtazic Acid / Q000494:pharmacology; D005707:Gallic Acid / Q000031:analogs & derivatives / Q000494:pharmacology; D006801:Humans; D007376:Interleukin-2; D008213:Lymphocyte Activation; D010835:Phytohemagglutinins / Q000494:pharmacology; D013601:T-Lymphocytes / Q000276:immunology*; D014700:Verapamil / Q000494:pharmacology
chemical_list: D007376:Interleukin-2; D010835:Phytohemagglutinins; D000001:Calcimycin; D004533:Egtazic Acid; C006014:8-(N,N-diethylamino)octyl-3,4,5-trimethoxybenzoate; D005707:Gallic Acid; D014700:Verapamil; D002118:Calcium