title: Adenosine 5'-triphosphate (ATP)-mediated stimulation and suppression of DNA synthesis in lymphoid cells. II. Suppressive effect of ATP on murine T-cell functions.
abstract: The suppressive effects of ATP on murine T-cell functions were studied. The suppressive effects of ATP as well as adenosine on the DNA synthesis of spleen cells are due to the presence of mature T-cells, because ATP has no suppressive effect on athymic nu/nu spleen cells. Further characterization of the cells which are responsible for ATP-mediated suppression of DNA synthesis revealed that the cells are nylon wool-adherent T-cells and PHA-reactive T-cells. In addition, the suppressive effects of ATP on both spontaneous and mitogen-induced proliferative responses are stronger than that of adenosine, and T-cells are more sensitive to ATP than B-cells. The observation that both ATP and adenosine have unique effects on T-cells compared to B-cells may contribute toward explaining why patients with severe combined immunodeficiency (SCID) associated with adenosine deaminase (ADA) deficiency have greater T-cell than B-cell abnormalities.
mesh_terms: D000241:Adenosine / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000375:Aging; D000818:Animals; D004247:DNA / Q000096:biosynthesis*; D006462:Hemolytic Plaque Technique; D007166:Immunosuppressive Agents; D066298:In Vitro Techniques; D008221:Lymphoid Tissue / Q000187:drug effects / Q000378:metabolism*; D051379:Mice; D008815:Mice, Inbred Strains; D008934:Mitogens / Q000494:pharmacology; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes / Q000187:drug effects
chemical_list: D007166:Immunosuppressive Agents; D008934:Mitogens; D000255:Adenosine Triphosphate; D004247:DNA; D000241:Adenosine