title: Role of ADH in ethylketocyclazocine-induced diuresis: studies in the Brattleboro rat.
abstract: Kappa opioids produce diuresis presumably through ADH. We investigated further the role of ADH in kappa-induced diuresis by utilizing the Brattleboro rat, a strain lacking endogenous ADH. Ethylketocyclazocine (EKC), a kappa opioid prototype, increased urine formation in Sprague-Dawley, but not in Brattleboro rats. Furthermore, EKC pretreatment abolished the antidiuretic response to ADH administered exogenously to Brattleboro rats. Our study suggests that, in addition to a fall in plasma ADH reported previously, kappa opioids have direct effects on the renal response to ADH.
mesh_terms: D000818:Animals; D003496:Cyclazocine / Q000031:analogs & derivatives* / Q000494:pharmacology; D003919:Diabetes Insipidus / Q000503:physiopathology; D004231:Diuresis / Q000187:drug effects*; D016314:Ethylketocyclazocine; D051381:Rats; D011910:Rats, Brattleboro / Q000502:physiology; D011919:Rats, Inbred Strains; D011957:Receptors, Opioid / Q000187:drug effects; D017473:Receptors, Opioid, kappa; D014667:Vasopressins / Q000172:deficiency / Q000494:pharmacology* / Q000502:physiology
chemical_list: D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D014667:Vasopressins; D016314:Ethylketocyclazocine; D003496:Cyclazocine