PMID- 10218903 OWN - NLM STAT- MEDLINE DCOM- 19990607 LR - 20210223 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 263 IP - 1 DP - 1999 Mar 19 TI - Differential cholera-toxin sensitivity of supraspinal antinociception induced by the cannabinoid agonists delta9-THC, WIN 55,212-2 and anandamide in mice. PG - 29-32 AB - Intracerebroventricular (i.c.v.) administration to mice of delta9-tetrahydrocannabinol (delta9-THC), WIN 55,212-2 or the endogenous cannabinoid anandamide induced dose-related antinociception in the 55 degrees C warm-water tail-flick test. Pretreatment (24 h, i.c.v.) with pertussis toxin dose-dependently reduced the antinociceptive effect of delta9-THC (955 nmol), WIN 55,212-2 (30 nmol) and anandamide (135 nmol) (IC50 = 0.13, 5.5, and 0.32 nmol, respectively). In contrast, pretreatment (24 h, i.c.v.) with cholera toxin (0.1-3.0 mg) reduced the antinociception of WIN 55,212-2, had minimal effect on delta9-THC, and dose-dependently increased the antinociception of anandamide (ED50 = 0.50 nmol). These data suggest differences in the receptor-effector coupling of delta9-THC, WIN 55,212-2 and anandamide in supraspinal-induced antinociception in mice. FAU - Raffa, R B AU - Raffa RB AD - Temple University School of Pharmacy, Philadelphia, PA 19140-5104, USA. FAU - Stone, D J Jr AU - Stone DJ Jr FAU - Hipp, S J AU - Hipp SJ LA - eng PT - Journal Article PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Analgesics) RN - 0 (Arachidonic Acids) RN - 0 (Benzoxazines) RN - 0 (Cannabinoids) RN - 0 (Endocannabinoids) RN - 0 (Morpholines) RN - 0 (Naphthalenes) RN - 0 (Polyunsaturated Alkamides) RN - 5H31GI9502 ((3R)-((2,3-dihydro-5-methyl-3-((4-morpholinyl)methyl)pyrrolo-(1,2,3-de)-1,4-benzoxazin-6-yl)(1-naphthalenyl))methanone) RN - 9012-63-9 (Cholera Toxin) RN - UR5G69TJKH (anandamide) SB - IM MH - Analgesics/administration & dosage/*pharmacology MH - Animals MH - Arachidonic Acids/administration & dosage/*pharmacology MH - Benzoxazines MH - Cannabinoids/administration & dosage/*pharmacology MH - Cerebral Ventricles/drug effects/*physiology MH - Cholera Toxin/administration & dosage/*pharmacology MH - Endocannabinoids MH - Injections, Intraventricular MH - Male MH - Mice MH - Mice, Inbred ICR MH - Morpholines/administration & dosage/*pharmacology MH - Naphthalenes/administration & dosage/*pharmacology MH - Pain/*physiopathology/prevention & control MH - Polyunsaturated Alkamides MH - Spinal Cord/drug effects/*physiology/physiopathology EDAT- 1999/04/28 02:03 MHDA- 2001/03/28 10:01 CRDT- 1999/04/28 02:03 PHST- 1999/04/28 02:03 [pubmed] PHST- 2001/03/28 10:01 [medline] PHST- 1999/04/28 02:03 [entrez] AID - S0304-3940(99)00096-8 [pii] AID - 10.1016/s0304-3940(99)00096-8 [doi] PST - ppublish SO - Neurosci Lett. 1999 Mar 19;263(1):29-32. doi: 10.1016/s0304-3940(99)00096-8.