PMID- 2933125 OWN - NLM STAT- MEDLINE DCOM- 19860122 LR - 20190614 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 348 IP - 1 DP - 1985 Nov 25 TI - The action of centrally administered arginine vasopressin on blood pressure in the conscious rabbit. PG - 137-45 AB - In addition to its peripheral endocrine actions, arginine vasopressin (AVP) has been implicated in the central control of blood pressure. Intracerebroventricular (i.c.v.) injections (0.01-1.0 nmol) of AVP or arginine vasotocin (AVT), but not oxytocin (OXY), into unanesthetized rabbits caused a rapid, dose related rise in blood pressure as well as increases in heart rate. The lowest centrally administered dose of AVP and AVT (0.01 nmol) had no effect on blood pressure when given intravenously. In search of tissue locus for the pressor effect of AVP microinjection of AVP and OXY into the posterior hypothalamus and septum of conscious rabbits was without effect. However, microinjection (0.01-0.04 nmol) of AVP into the nucleus tractus solitarius of anesthetized rabbits caused a rise in blood pressure similar to the response seen after i.c.v. injection. Comparable volumes of the vehicle into the ventricle or the tissue sites had no effect on resting blood pressure. The pressor response after AVP given i.c.v. was significantly reduced up to 3 h after administration of the ganglionic blocker, chlorisondamine HCl. The central antagonist, d(CH2)5Tyr (Me) vasopressin, eliminated the usual increase in blood pressure after administration of AVP in half the animals tested. The results indicate that AVP acts centrally to mediate cardiovascular responses in unanesthetized as well as anesthetized rabbits. FAU - Martin, S M AU - Martin SM FAU - Malkinson, T J AU - Malkinson TJ FAU - Veale, W L AU - Veale WL FAU - Pittman, Q J AU - Pittman QJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Receptors, Angiotensin) RN - 0 (Receptors, Vasopressin) RN - 113-79-1 (Arginine Vasopressin) RN - 50-56-6 (Oxytocin) RN - W6S6URY8OF (Vasotocin) SB - IM MH - Animals MH - Arginine Vasopressin/*pharmacology MH - Blood Pressure/*drug effects MH - Brain/*drug effects MH - Brain Mapping MH - Hypothalamus, Posterior/drug effects MH - Male MH - Medulla Oblongata/drug effects MH - Oxytocin/*pharmacology MH - Rabbits MH - Receptors, Angiotensin/drug effects MH - Receptors, Vasopressin MH - Septum Pellucidum/drug effects MH - Vasotocin/*pharmacology EDAT- 1985/11/25 00:00 MHDA- 1985/11/25 00:01 CRDT- 1985/11/25 00:00 PHST- 1985/11/25 00:00 [pubmed] PHST- 1985/11/25 00:01 [medline] PHST- 1985/11/25 00:00 [entrez] AID - 0006-8993(85)90369-5 [pii] AID - 10.1016/0006-8993(85)90369-5 [doi] PST - ppublish SO - Brain Res. 1985 Nov 25;348(1):137-45. doi: 10.1016/0006-8993(85)90369-5.