PMID- 16102736 OWN - NLM STAT- MEDLINE DCOM- 20051121 LR - 20191210 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 1056 IP - 1 DP - 2005 Sep 14 TI - Effects and mechanisms of supraspinal administration of rat/mouse hemokinin-1, a mammalian tachykinin peptide, on nociception in mice. PG - 51-8 AB - Rat/mouse hemokinin 1 (r/m HK-1) is a novel tachykinin peptide whose biological functions are not fully understood. This work was designed to observe the effects of r/m HK-1 in pain modulation at supraspinal level in mice using tail-flick test. Intracerebroventricular (i.c.v.) administration of r/m HK-1 (0.1, 0.3, 1, 3 nmol/mouse) dose-dependently induced potent analgesic effect (ED(50) = 0.2877 nmol/mouse). When r/m HK-1 co-injected (i.c.v.) with SR140333 (a selective NK(1) receptor antagonist), SR140333 could fully antagonize the analgesic effect of r/m HK-1. The maximal analgesic effect of r/m HK-1 (3 nmol/mouse) could also be reversed by naloxone (i.p., 2 mg/kg). However, i.c.v. low dose administration of r/m HK-1 (10, 3, 1 pmol/mouse) induced hyperalgesia with a "U" shape curve, which means that the maximal hyperalgesic effect appeared at 3 pmol/mouse, and this effect of r/m HK-1 could also be fully blocked by SR140333. Interestingly, [Nphe(1)]NC(1-13)NH(2), a selective opioid receptor like-1 (ORL-1) receptor antagonist, could fully reverse the maximal hyperalgesic effect of r/m HK-1 (3 pmol/mouse). In addition, when r/m HK-1 co-injected (i.c.v.) with SR48968 (a selective NK(2) receptor antagonist), SR48968 could hardly affect the nociceptive effects of r/m HK-1 either at nanomole concentration or at picomole concentration. These findings suggested that r/m HK-1 might play an important role in pain modulation at supraspinal level in mice and these effects were first elicited through the activation of NK(1) receptor, subsequently, whether activation of the classical opioid receptor or the ORL1 receptor depending on the dose of i.c.v. administration of r/m HK-1. FAU - Fu, Cai-Yun AU - Fu CY AD - Department of Biochemistry and Molecular Biology, School of Life Science, Lanzhou University, 222 Tian Shui South Road, Lanzhou 730000, People's Republic of China. FAU - Kong, Zi-Qing AU - Kong ZQ FAU - Wang, Kai-Rong AU - Wang KR FAU - Yang, Qi AU - Yang Q FAU - Zhai, Kui AU - Zhai K FAU - Chen, Qiang AU - Chen Q FAU - Wang, Rui AU - Wang R LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Benzamides) RN - 0 (GPI-Linked Proteins) RN - 0 (HJV protein, mouse) RN - 0 (Hemochromatosis Protein) RN - 0 (Membrane Proteins) RN - 0 (Narcotic Antagonists) RN - 0 (Piperidines) RN - 0 (Quinuclidines) RN - 0 (cyclo(N-benzylglycyl-phenylalanyl-tryptophyl-lysyl-threonyl-phenylalanyl)) RN - 153050-21-6 (SR 140333) RN - 36B82AMQ7N (Naloxone) RN - 51110-01-1 (Somatostatin) RN - 720U2QK8I5 (SR 48968) SB - IM MH - Analysis of Variance MH - Animals MH - Behavior, Animal MH - Benzamides/pharmacology MH - Dose-Response Relationship, Drug MH - Drug Administration Routes MH - GPI-Linked Proteins MH - Hemochromatosis MH - Hemochromatosis Protein MH - Injections, Spinal/methods MH - Male MH - Membrane Proteins/*administration & dosage/therapeutic use MH - Mice MH - Mice, Inbred Strains MH - Naloxone/pharmacology MH - Narcotic Antagonists/pharmacology MH - Pain/*drug therapy MH - Pain Measurement/methods MH - Piperidines/pharmacology MH - Quinuclidines/pharmacology MH - Rats MH - Somatostatin/analogs & derivatives/pharmacology MH - Time Factors EDAT- 2005/08/17 09:00 MHDA- 2005/12/13 09:00 CRDT- 2005/08/17 09:00 PHST- 2005/06/10 00:00 [received] PHST- 2005/07/13 00:00 [revised] PHST- 2005/07/13 00:00 [accepted] PHST- 2005/08/17 09:00 [pubmed] PHST- 2005/12/13 09:00 [medline] PHST- 2005/08/17 09:00 [entrez] AID - S0006-8993(05)01067-X [pii] AID - 10.1016/j.brainres.2005.07.020 [doi] PST - ppublish SO - Brain Res. 2005 Sep 14;1056(1):51-8. doi: 10.1016/j.brainres.2005.07.020.