title: Age and beta adrenoceptor-mediated function.
abstract: Beta adrenoceptor-mediated responsiveness to isoproterenol was compared in young and old subjects using the production of cyclic adenosine monophosphate (cyclic AMP) by lymphocytes as an index. The mean log dose-response curve for the elderly group was displaced to the right and the mean maximum response was less than that for the young subjects. The results corroborate evidence of a decreased response to isoproterenol-induced increases in heart rate in the elderly and raise the possibility of a generalized decrease in beta adrenoceptor-mediated functions in old age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D001665:Binding Sites; D000242:Cyclic AMP / Q000096:biosynthesis; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D007958:Leukocyte Count; D008214:Lymphocytes / Q000378:metabolism; D008297:Male; D011941:Receptors, Adrenergic / Q000502:physiology*; D011943:Receptors, Adrenergic, beta / Q000502:physiology*
chemical_list: D011941:Receptors, Adrenergic; D011943:Receptors, Adrenergic, beta; D000242:Cyclic AMP; D007545:Isoproterenol