PMID- 2796602 OWN - NLM STAT- MEDLINE DCOM- 19891109 LR - 20190701 IS - 0024-3205 (Print) IS - 0024-3205 (Linking) VI - 45 IP - 13 DP - 1989 TI - Acetylcholine in the posterior hypothalamic nucleus is involved in the elevated blood pressure in the spontaneously hypertensive rat. PG - 1163-70 AB - Intravenous injection of physostigmine, 40 and 80 ug/kg, in unanesthetized normotensive rats increased systolic blood pressure (SBP) by 21 +/- 3 and 42 +/- 7 mmHg. This pressor response was 80% inhibited by intracerebroventricular (icv) injection of hemicholinium-3 (HC-3), 20 ug. Simultaneous icv injection of HC-3 and choline (365 ug) prevented the inhibition of the pressor response by HC-3. In spontaneously hypertensive rats, injection of HC-3 either icv (20 ug) or bilaterally into the posterior hypothalamic nuclei (1 ug) decreased SBP by about 40 mmHg. The effect of intrahypothalamic HC-3 was completely blocked by simultaneous injection of choline (24.3 ug) into the same site. The hypotensive effect of icv HC-3 was completely blocked by icv choline (243 ug) and was inhibited up to 60% by injections of choline (24.3 ug) into the posterior hypothalamic nuclei. FAU - Brezenoff, H E AU - Brezenoff HE AD - Department of Pharmacology, University of Medicine and Dentistry of New Jersey, Newark 07103. FAU - Xiao, Y F AU - Xiao YF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Life Sci JT - Life sciences JID - 0375521 RN - 312-45-8 (Hemicholinium 3) RN - 9U1VM840SP (Physostigmine) RN - N91BDP6H0X (Choline) RN - N9YNS0M02X (Acetylcholine) SB - IM MH - Acetylcholine/*physiology MH - Animals MH - Blood Pressure/drug effects/*physiology MH - Choline/administration & dosage/pharmacology MH - Hemicholinium 3/administration & dosage/pharmacology MH - Hypertension/*physiopathology MH - Hypothalamus/drug effects/*physiology MH - Injections, Intraventricular MH - Kinetics MH - Male MH - Physostigmine/administration & dosage/pharmacology MH - Rats MH - Rats, Inbred SHR MH - Rats, Inbred Strains EDAT- 1989/01/01 00:00 MHDA- 1989/01/01 00:01 CRDT- 1989/01/01 00:00 PHST- 1989/01/01 00:00 [pubmed] PHST- 1989/01/01 00:01 [medline] PHST- 1989/01/01 00:00 [entrez] AID - 0024-3205(89)90504-3 [pii] AID - 10.1016/0024-3205(89)90504-3 [doi] PST - ppublish SO - Life Sci. 1989;45(13):1163-70. doi: 10.1016/0024-3205(89)90504-3.