PMID- 2894314 OWN - NLM STAT- MEDLINE DCOM- 19880418 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 144 IP - 3 DP - 1987 Dec 15 TI - Excessive grooming induced by somatostatin or its analog SMS 201-995. PG - 277-85 AB - Intracerebroventricular (i.c.v.) administration of somatostatin or SMS 201-995 induces excessive grooming behavior in rats. The grooming inducing effect of somatostatin is rather weak, as doses of 300 ng or less did not result in increased total grooming scores. In contrast a dose of 10 ng SMS 201-995 already significantly increased the total grooming scores. However, doses of 100 ng and more did not further increase the total grooming scores reached with a 50 ng dose of this peptide. Systemic administration of SMS 201-995 in doses up to 900 micrograms did not result in excessive grooming behavior. The patterns of excessive grooming induced by i.c.v. SMS 201-995 and somatostatin were characterized by a predominant display of scratching. Since peptide-induced scratching is mainly due to activation of opiate receptor systems it is suggested that opiate receptors are involved in the behavioral response to SMS 201-995 and somatostatin administration. This suggestion is further supported by the suppressive effect of naloxone on excessive grooming induced by these peptides. Haloperidol and neurotensin also suppress the excessive grooming induced by somatostatin but not that induced by SMS 201-995. Finally, tolerance developed to the grooming-inducing effect of SMS 201-995 and somatostatin. In addition there was cross tolerance between somatostatin and SMS 201-995. FAU - Van Wimersma Greidanus, T B AU - Van Wimersma Greidanus TB AD - Rudolf Magnus Institute for Pharmacology, Medical Faculty, University of Utrecht, The Netherlands. FAU - Maigret, C AU - Maigret C FAU - Krechting, B AU - Krechting B LA - eng PT - Journal Article PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Receptors, Opioid) RN - 36B82AMQ7N (Naloxone) RN - 39379-15-2 (Neurotensin) RN - 51110-01-1 (Somatostatin) RN - J6292F8L3D (Haloperidol) RN - RWM8CCW8GP (Octreotide) SB - IM MH - Animals MH - Dose-Response Relationship, Drug MH - Drug Tolerance MH - Grooming/*drug effects/physiology MH - Haloperidol/pharmacology MH - Injections, Intraventricular MH - Male MH - Naloxone/pharmacology MH - Neurotensin/pharmacology MH - Octreotide MH - Rats MH - Rats, Inbred Strains MH - Receptors, Opioid/drug effects/physiology MH - Somatostatin/administration & dosage/*analogs & derivatives/*pharmacology EDAT- 1987/12/15 00:00 MHDA- 1987/12/15 00:01 CRDT- 1987/12/15 00:00 PHST- 1987/12/15 00:00 [pubmed] PHST- 1987/12/15 00:01 [medline] PHST- 1987/12/15 00:00 [entrez] AID - 0014-2999(87)90380-3 [pii] AID - 10.1016/0014-2999(87)90380-3 [doi] PST - ppublish SO - Eur J Pharmacol. 1987 Dec 15;144(3):277-85. doi: 10.1016/0014-2999(87)90380-3.