PMID- 2991806 OWN - NLM STAT- MEDLINE DCOM- 19850919 LR - 20190912 IS - 0143-4179 (Print) IS - 0143-4179 (Linking) VI - 6 IP - 3 DP - 1985 Jun TI - The role of central dopaminergic systems in the behavioral effects of H-Phe-Ile-Tyr-His-Ser-Tyr-Lys-OH. PG - 183-90 AB - In the present study the role of the central dopaminergic systems in the behavioral action of H-Phe-Ile-Tyr-His-Ser-Tyr-Lys-OH was investigated. The heptapeptide inhibited the extinction of active avoidance behavior if the treatment was performed intracerebroventricularly (icv) in a dose of 1 microgram, but was ineffective in a dose of 0.1 micrograms. If the peptide was injected into the nucleus accumbens septi (NAS) in a dose of 1 microgram, 0.1 micrograms or 0.01 micrograms it inhibited the extinction, but in the latter dose its effect was only a short one. H-Phe-Ile-Tyr-His-Ser-Tyr-Lys-OH in a dose of 1 microgram, 10 micrograms or 20 micrograms (icv) did not influence the turning activity of unilateral substantia nigra (USN)-lesioned animals. These results suggest that the NAS plays an important role in the behavioral action of H-Phe-Ile-Tyr-His-Ser-Tyr-Lys-OH and the heptapeptide has no direct dopamine receptor stimulatory or dopamine-releasing effect in the striatum. FAU - Vecsei, L AU - Vecsei L FAU - Telegdy, G AU - Telegdy G FAU - Bollok, I AU - Bollok I FAU - Schally, A V AU - Schally AV LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Neuropeptides JT - Neuropeptides JID - 8103156 RN - 0 (Oligopeptides) RN - 78107-95-6 (H-phenylalanyl-isoleucyl-tyrosyl-histidyl-seryl-tyrosyl-lysine) RN - VTD58H1Z2X (Dopamine) SB - IM MH - Animals MH - Avoidance Learning/drug effects MH - Behavior, Animal/*drug effects MH - Brain/*drug effects MH - Corpus Striatum/drug effects MH - Dopamine/*physiology MH - Extinction, Psychological/drug effects MH - Male MH - Motor Activity/drug effects MH - Nucleus Accumbens/drug effects MH - Oligopeptides/*pharmacology MH - Rats MH - Rats, Inbred Strains MH - Rotation MH - Synaptic Transmission/*drug effects EDAT- 1985/06/01 00:00 MHDA- 1985/06/01 00:01 CRDT- 1985/06/01 00:00 PHST- 1985/06/01 00:00 [pubmed] PHST- 1985/06/01 00:01 [medline] PHST- 1985/06/01 00:00 [entrez] AID - 0143-4179(85)90089-7 [pii] AID - 10.1016/0143-4179(85)90089-7 [doi] PST - ppublish SO - Neuropeptides. 1985 Jun;6(3):183-90. doi: 10.1016/0143-4179(85)90089-7.