PMID- 9302091 OWN - NLM STAT- MEDLINE DCOM- 19971113 LR - 20190701 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 232 IP - 2 DP - 1997 Aug 29 TI - Centrally administered choline increases plasma prolactin levels in conscious rats. PG - 79-82 AB - Intracerebroventricular (i.c.v.) administration of choline, a precursor of acetylcholine (ACh) increased plasma prolactin levels in a time and dose-dependent manner in conscious rats. Pretreatment of rats with the cholinergic muscarinic antagonist, atropine (10 microg, i.c.v.), blocked the increase in plasma prolactin level. The increase was not influenced by pretreatment with the cholinergic nicotinic antagonist, mecamylamine (50 microg, i.c.v.). Pretreatment with hemicholinium-3 (HC-3; 20 microg, i.c.v.), a high affinity choline uptake inhibitor, attenuated the choline-induced increase of plasma prolactin levels. These results show that choline increases plasma prolactin levels by activating muscarinic receptors via presynaptic mechanisms. FAU - Gurun, M S AU - Gurun MS AD - Department of Pharmacology, Uludag University Medical Faculty, Bursa, Turkey. FAU - Savci, V AU - Savci V FAU - Ulus, I H AU - Ulus IH FAU - Kiran, B K AU - Kiran BK LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Cholinergic Agents) RN - 0 (Muscarinic Antagonists) RN - 0 (Nicotinic Antagonists) RN - 312-45-8 (Hemicholinium 3) RN - 6EE945D3OK (Mecamylamine) RN - 7C0697DR9I (Atropine) RN - 9002-62-4 (Prolactin) RN - N91BDP6H0X (Choline) SB - IM MH - Animals MH - Atropine/pharmacology MH - Choline/*administration & dosage MH - Cholinergic Agents/pharmacology MH - Dose-Response Relationship, Drug MH - Hemicholinium 3/pharmacology MH - Injections, Intraventricular MH - Male MH - Mecamylamine/pharmacology MH - Muscarinic Antagonists/pharmacology MH - Nicotinic Antagonists/pharmacology MH - Prolactin/*blood/drug effects MH - Rats MH - Rats, Wistar MH - Time Factors EDAT- 1997/08/29 00:00 MHDA- 1997/09/25 00:01 CRDT- 1997/08/29 00:00 PHST- 1997/08/29 00:00 [pubmed] PHST- 1997/09/25 00:01 [medline] PHST- 1997/08/29 00:00 [entrez] AID - S0304-3940(97)00580-6 [pii] AID - 10.1016/s0304-3940(97)00580-6 [doi] PST - ppublish SO - Neurosci Lett. 1997 Aug 29;232(2):79-82. doi: 10.1016/s0304-3940(97)00580-6.