PMID- 12361849 OWN - NLM STAT- MEDLINE DCOM- 20021129 LR - 20231213 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 331 IP - 2 DP - 2002 Oct 11 TI - Effects of nociceptin (13-17) in pain modulation at supraspinal level in mice. PG - 95-8 AB - This work was designed to observe the effects of nociceptin(13-17), one of the main metabolites of nociceptin (also termed orphanin FQ), in pain modulation at supraspinal level in mice. Intracerebroventricular (i.c.v.) administration of nociceptin/orphanin FQ(13-17) (N/OFQ(13-17)) (5, 0.5, 0.05, 0.005 nmol/mouse) dose-dependently induced potent hyperalgesic effects in the 48 degrees C warm-water tail-flick test in mice. I.c.v. pretreatment with N/OFQ(13-17) (5, 0.5, 0.05 nmol/mouse) potentiated the analgesic effects induced by morphine (i.p., 2 mg/kg) and reversed the hyperalgesic effects induced by N/OFQ (i.c.v., 5 nmol/mouse). The hyperalgesic effects induced by N/OFQ(13-17) could not be antagonized by [Nphe((1))]N/OFQ(1-13)NH((2)) or naloxone. These findings suggest that N/OFQ(13-17) may play important roles in pain modulation at supraspinal level in mice and elicits these effects through a novel mechanism independent of the N/OFQ receptor and the mu, delta and kappa opioid receptors. FAU - Chen, Li-Xiang AU - Chen LX AD - Department of Biochemistry and Molecular Biology, School of Life Science, Lanzhou University, 298 Tian Shui Road, 730000, Peoples Republic of, Lanzhou, China. FAU - Wang, Zhuan-Zi AU - Wang ZZ FAU - Wu, Hua AU - Wu H FAU - Fang, Quan AU - Fang Q FAU - Chen, Yong AU - Chen Y FAU - Wang, Rui AU - Wang R LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Analgesics, Opioid) RN - 0 (Opioid Peptides) RN - 0 (Peptide Fragments) RN - 0 (Vasodilator Agents) RN - 0 (nociceptin (1-13) amide) RN - 36B82AMQ7N (Naloxone) RN - 73674-85-8 (naloxazone) RN - 76I7G6D29C (Morphine) SB - IM MH - Analgesia MH - Analgesics, Opioid/administration & dosage/pharmacology MH - Animals MH - Dose-Response Relationship, Drug MH - Hot Temperature MH - Hyperalgesia/*chemically induced/physiopathology MH - Injections, Intraventricular MH - Male MH - Mice MH - Morphine/administration & dosage/pharmacology MH - Naloxone/administration & dosage/*analogs & derivatives/pharmacology MH - Opioid Peptides/administration & dosage/*pharmacology MH - Pain Measurement MH - Peptide Fragments/administration & dosage/*pharmacology MH - Vasodilator Agents/administration & dosage/*pharmacology MH - Nociceptin EDAT- 2002/10/04 04:00 MHDA- 2002/11/30 04:00 CRDT- 2002/10/04 04:00 PHST- 2002/10/04 04:00 [pubmed] PHST- 2002/11/30 04:00 [medline] PHST- 2002/10/04 04:00 [entrez] AID - S0304394002008443 [pii] AID - 10.1016/s0304-3940(02)00844-3 [doi] PST - ppublish SO - Neurosci Lett. 2002 Oct 11;331(2):95-8. doi: 10.1016/s0304-3940(02)00844-3.