title: Interaction of cyclic AMP derivatives with the angiotensin II receptor.
abstract: The effect of cyclic AMP and of its derivatives was studied on 125I-angiotensin II and 125I-(Sar1,Ala8)-angiotensin II binding to rat adrenal membrane receptors. Dibutyryl cyclic AMP, 8-bromo-cyclic AMP and cyclic AMP inhibited both agonist and antagonist binding in a specific and dose-dependent way, with Ki of 1.3 mM, 6.8 mM and about 30 mM, respectively. Scatchard analysis of binding data indicated that the nucleotides interacted directly with the membrane receptor for angiotensin II. These results suggest that cyclic AMP may act extracellularly and affect receptor-mediated events.
mesh_terms: D015124:8-Bromo Cyclic Adenosine Monophosphate / Q000494:pharmacology; D000311:Adrenal Glands / Q000187:drug effects / Q000378:metabolism; D000804:Angiotensin II / Q000378:metabolism*; D000818:Animals; D003994:Bucladesine / Q000494:pharmacology; D000242:Cyclic AMP / Q000494:pharmacology*; D005260:Female; D066298:In Vitro Techniques; D051381:Rats; D011945:Receptors, Angiotensin / Q000187:drug effects / Q000378:metabolism*; D011956:Receptors, Cell Surface / Q000378:metabolism*; D014599:Uterus / Q000187:drug effects / Q000378:metabolism
chemical_list: D011945:Receptors, Angiotensin; D011956:Receptors, Cell Surface; D000804:Angiotensin II; D015124:8-Bromo Cyclic Adenosine Monophosphate; D003994:Bucladesine; D000242:Cyclic AMP