title: Immunologic studies of aging. VIII: no change in cyclic nucleotide concentration in T lymphocytes from old humans despite their depressed proliferative response.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D003208:Concanavalin A / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism*; D006152:Cyclic GMP / Q000378:metabolism*; D006801:Humans; D008213:Lymphocyte Activation; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism*
chemical_list: D003208:Concanavalin A; D000242:Cyclic AMP; D006152:Cyclic GMP