PMID- 11604250 OWN - NLM STAT- MEDLINE DCOM- 20011207 LR - 20190719 IS - 0361-9230 (Print) IS - 0361-9230 (Linking) VI - 56 IP - 1 DP - 2001 Sep 1 TI - Prostaglandins may participate in opioidergic and cholinergic control of the diurnal changes of tuberoinfundibular dopaminergic neuronal activity and serum prolactin level in ovariectomized, estrogen-treated rats. PG - 61-5 AB - The roles of prostaglandins (PGs) involved in opioidergic, cholinergic, and serotonergic regulation of the diurnal changes of tuberoinfundibular dopaminergic (TIDA) neuronal activities were investigated in ovariectomized, estrogen-treated rats. Treatment with naloxone [10 mg/kg, intraperitoneal (i.p.)], atropine (5 mg/kg, i.p.), or ketanserin (10 mg/kg, i.p.) at either 1200 or 1400 h prevented the afternoon decrease of TIDA neuronal activity and the prolactin (PRL) surge. Intracerebroventricular (i.c.v.) injection of PGE(1) (5 microg/3 microl/rat) at 1500 h significantly reversed the effects of naloxone and atropine, but not that of ketanserin. In ovariectomized, estrogen-primed rats pretreated with indomethacin, i.c.v. injection of either nicotine (10 ng/rat) or fentanyl (10 ng/rat) failed to suppress the TIDA neuronal activity and to stimulate the PRL secretion. These data suggest that PG may be involved in opioidergic and cholinergic control of the diurnal changes of TIDA neuronal activity and the PRL secretion in ovariectomized (OVX) + E(2) rats. FAU - Chu, Y C AU - Chu YC AD - Department of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan. FAU - Tsou, M Y AU - Tsou MY FAU - Pan, J T AU - Pan JT LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Brain Res Bull JT - Brain research bulletin JID - 7605818 RN - 0 (Analgesics, Opioid) RN - 0 (Estrogens) RN - 0 (Muscarinic Antagonists) RN - 0 (Narcotic Antagonists) RN - 0 (Opioid Peptides) RN - 0 (Prostaglandins) RN - 333DO1RDJY (Serotonin) RN - 36B82AMQ7N (Naloxone) RN - 9002-62-4 (Prolactin) RN - 97F9DE4CT4 (Ketanserin) RN - N9YNS0M02X (Acetylcholine) RN - VTD58H1Z2X (Dopamine) SB - IM MH - Acetylcholine/*metabolism MH - Analgesics, Opioid/pharmacology MH - Animals MH - Circadian Rhythm/drug effects/*physiology MH - Dopamine/*metabolism MH - Estrogens/metabolism/pharmacology MH - Female MH - Hypothalamo-Hypophyseal System/drug effects/metabolism MH - Ketanserin/pharmacology MH - Median Eminence/drug effects/*metabolism MH - Muscarinic Antagonists/pharmacology MH - Naloxone/pharmacology MH - Narcotic Antagonists/pharmacology MH - Neurons/drug effects/*metabolism MH - Opioid Peptides/*metabolism MH - Ovariectomy MH - Prolactin/*blood/metabolism MH - Prostaglandins/*metabolism/pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Serotonin/metabolism EDAT- 2001/10/18 10:00 MHDA- 2002/01/05 10:01 CRDT- 2001/10/18 10:00 PHST- 2001/10/18 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/10/18 10:00 [entrez] AID - S0361-9230(01)00605-0 [pii] AID - 10.1016/s0361-9230(01)00605-0 [doi] PST - ppublish SO - Brain Res Bull. 2001 Sep 1;56(1):61-5. doi: 10.1016/s0361-9230(01)00605-0.