PMID- 2266778 OWN - NLM STAT- MEDLINE DCOM- 19910208 LR - 20190701 IS - 0024-3205 (Print) IS - 0024-3205 (Linking) VI - 47 IP - 21 DP - 1990 TI - The effect of cholinergic manipulations on the analgesic response to cobrotoxin in mice. PG - 1949-54 AB - Intracerebroventricular (i.c.v.) injection of cobrotoxin (CT), a neurotoxin isolated from the venom of Naja naja atra, produced an antinociceptive response in mice as measured by the tail-flick test. This effect of CT was blocked by systemic administration of atropine, but not by methylatropine or naloxone. Depletion of central acetylcholine (ACh) by hemicholinium-3 (HC-3) blocked the antinociceptive action of cobrotoxin. These results suggest that central cholinergic neurons are important for the mediation of the antinociceptive properties of cobrotoxin. FAU - Chen, R Z AU - Chen RZ AD - Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0613. FAU - Robinson, S E AU - Robinson SE LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Life Sci JT - Life sciences JID - 0375521 RN - 0 (Atropine Derivatives) RN - 0 (Cobra Neurotoxin Proteins) RN - 0 (Parasympatholytics) RN - 7C0697DR9I (Atropine) RN - 80719I460H (methylatropine) RN - N9YNS0M02X (Acetylcholine) SB - IM MH - Acetylcholine/*physiology MH - Analgesia MH - Animals MH - Atropine/pharmacology MH - Atropine Derivatives/pharmacology MH - Cholinergic Fibers/drug effects/physiology MH - Cobra Neurotoxin Proteins/administration & dosage/*pharmacology MH - Injections, Intraventricular MH - Male MH - Mice MH - Mice, Inbred ICR MH - Neurons/drug effects/physiology MH - Nociceptors/drug effects/physiology MH - Pain Measurement/methods MH - Parasympatholytics/pharmacology EDAT- 1990/01/01 00:00 MHDA- 1990/01/01 00:01 CRDT- 1990/01/01 00:00 PHST- 1990/01/01 00:00 [pubmed] PHST- 1990/01/01 00:01 [medline] PHST- 1990/01/01 00:00 [entrez] AID - 0024-3205(90)90407-I [pii] AID - 10.1016/0024-3205(90)90407-i [doi] PST - ppublish SO - Life Sci. 1990;47(21):1949-54. doi: 10.1016/0024-3205(90)90407-i.