PMID- 2907115 OWN - NLM STAT- MEDLINE DCOM- 19890502 LR - 20190726 IS - 0028-3908 (Print) IS - 0028-3908 (Linking) VI - 27 IP - 10 DP - 1988 Oct TI - Antagonism of dermorphin-induced catalepsy with naloxone, TRH-analog CG3703 and the benzodiazepine antagonist, Ro 15-1788. PG - 1007-12 AB - Intracerebroventricular (i.c.v.) administration of the highly selective opiate mu-receptor agonist, dermorphin, produced dose-dependent catalepsy in conscious rats. The cataleptic effect of dermorphin was abolished by pretreatment (intraperitoneal, i.p.) with the opiate-antagonist naloxone (5 mg/kg), thyrotropin-releasing hormone analog CG3703 (1 mg/kg) or the benzodiazepine-antagonist Ro 15-1788 (5 mg/kg) whereas pretreatment with the benzodiazepine alprazolam (1 mg/kg) potentiated the cataleptic effect of dermorphin. When given to cataleptic rats, naloxone and CG3703, but not Ro 15-1788, reversed the dermorphin-induced catalepsy. The data suggest an involvement of benzodiazepine receptors in the induction of catalepsy mediated by opioid mu-receptors. Other opioid-modulating neuronal systems, antagonized by CG3703, may be involved in maintaining the dermorphin-induced cataleptic state. FAU - Paakkari, P AU - Paakkari P AD - Department of Neurology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814. FAU - Feuerstein, G AU - Feuerstein G LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - England TA - Neuropharmacology JT - Neuropharmacology JID - 0236217 RN - 0 (Analgesics, Opioid) RN - 0 (Oligopeptides) RN - 0 (Opioid Peptides) RN - 2SEC01B703 (dermorphin) RN - 30MUJ6YYUY (montirelin) RN - 36B82AMQ7N (Naloxone) RN - 40P7XK9392 (Flumazenil) RN - 5Y5F15120W (Thyrotropin-Releasing Hormone) RN - YU55MQ3IZY (Alprazolam) SB - IM MH - Alprazolam/pharmacology MH - Analgesics, Opioid/*antagonists & inhibitors/toxicity MH - Animals MH - Catalepsy/*chemically induced MH - Flumazenil/*pharmacology MH - Injections, Intraventricular MH - Male MH - Naloxone/*pharmacology MH - Oligopeptides/administration & dosage/*antagonists & inhibitors/toxicity MH - Opioid Peptides MH - Rats MH - Rats, Inbred Strains MH - Thyrotropin-Releasing Hormone/*analogs & derivatives/pharmacology EDAT- 1988/10/01 00:00 MHDA- 1988/10/01 00:01 CRDT- 1988/10/01 00:00 PHST- 1988/10/01 00:00 [pubmed] PHST- 1988/10/01 00:01 [medline] PHST- 1988/10/01 00:00 [entrez] AID - 10.1016/0028-3908(88)90060-3 [doi] PST - ppublish SO - Neuropharmacology. 1988 Oct;27(10):1007-12. doi: 10.1016/0028-3908(88)90060-3.