PMID- 3697728 OWN - NLM STAT- MEDLINE DCOM- 19860602 LR - 20190614 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 368 IP - 2 DP - 1986 Mar 19 TI - Oxytocin potently enhances novelty-induced grooming behavior in the rat. PG - 287-95 AB - Intracerebroventricular (i.c.v.) injection of oxytocin was followed by an enhancement of novelty-induced grooming in male and female rats. This effect was dose-dependent, in a dose range of 0.1-10 micrograms. Grooming activity of rats injected i.c.v. with 10 micrograms of oxytocin was 9-fold higher than that of saline-injected controls. The analysis of behavioral element composition revealed an increased occurrence of genital grooming in oxytocin-injected rats. A time-course study revealed a sustained increase in grooming activity of oxytocin-treated rats during 45 min of behavioral testing. Intraperitoneal (i.p.) injection of the dopamine antagonist, haloperidol, totally suppressed oxytocin-enhanced grooming. Furthermore, i.p. injection of the opiate receptor antagonist, naloxone, was followed by an attenuation but not a suppression of grooming enhanced by i.c.v. administration of oxytocin. In addition, a small but significant increase in grooming activity was observed after subcutaneous injection of oxytocin. These results suggest that oxytocin-enhanced grooming behavior involves central mechanisms, e.g. dopamine and opioid transmission in the brain. FAU - Drago, F AU - Drago F FAU - Pedersen, C A AU - Pedersen CA FAU - Caldwell, J D AU - Caldwell JD FAU - Prange, A J Jr AU - Prange AJ Jr LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 36B82AMQ7N (Naloxone) RN - 50-56-6 (Oxytocin) RN - J6292F8L3D (Haloperidol) SB - IM MH - Animals MH - Female MH - Grooming/*drug effects MH - Haloperidol/administration & dosage/pharmacology MH - Injections, Intraperitoneal MH - Injections, Intraventricular MH - Injections, Subcutaneous MH - Male MH - Naloxone/administration & dosage/pharmacology MH - Oxytocin/administration & dosage/*pharmacology MH - Rats MH - Rats, Inbred Strains MH - Sex Characteristics MH - Time Factors EDAT- 1986/03/19 00:00 MHDA- 2001/03/28 10:01 CRDT- 1986/03/19 00:00 PHST- 1986/03/19 00:00 [pubmed] PHST- 2001/03/28 10:01 [medline] PHST- 1986/03/19 00:00 [entrez] AID - 0006-8993(86)90573-1 [pii] AID - 10.1016/0006-8993(86)90573-1 [doi] PST - ppublish SO - Brain Res. 1986 Mar 19;368(2):287-95. doi: 10.1016/0006-8993(86)90573-1.