Protein Information

Name CB1 receptor
Synonyms Brain cannabinoid receptor 1; CNR1; CANN 6; CANN6; CB R; CB1; CB1 receptor; CB1A…

Compound Information

Name chlorpyrifos
CAS

Reference List

PubMed Abstract RScore(About this table)
12243867 Quistad GB, Nomura DK, Sparks SE, Segall Y, Casida JE: Cannabinoid CB1 receptor as a target for chlorpyrifos oxon and other organophosphorus pesticides. Toxicol Lett. 2002 Sep 5;135(1-2):89-93.
195(2,3,3,5) Details
16310817 Quistad GB, Klintenberg R, Caboni P, Liang SN, Casida JE: Monoacylglycerol lipase inhibition by organophosphorus compounds leads to elevation of brain 2-arachidonoylglycerol and the associated hypomotility in mice. Toxicol Appl Pharmacol. 2006 Feb 15;211(1):78-83. Epub 2005 Nov 28.

Three components of the cannabinoid system are sensitive to selected organophosphorus (OP) compounds: monoacylglycerol (MAG) lipase that hydrolyzes the major endogenous agonist 2-arachidonoylglycerol (2-AG); fatty acid amide hydrolase (FAAH) that cleaves the agonist anandamide present in smaller amounts; the CB1 receptor itself.
Remarkably high potency and low selectivity is observed with three O-alkyl (C1, C2, C3) alkylphosphonofluoridates (C8, C12) (IC50 0.60-3.0 nM), five S-alkyl (C5, C7, C9) and alkyl (C10, C12) benzodioxaphosphorin oxides (IC50 0.15-5.7 nM) and one OP insecticide metabolite (chlorpyrifos oxon, IC50 34-40 nM).
2(0,0,0,2) Details
16243304 Casida JE, Quistad GB: Serine hydrolase targets of organophosphorus toxicants. Chem Biol Interact. 2005 Dec 15;157-158:277-83. Epub 2005 Oct 21.

The toxicological relevance of known secondary OP targets is established mainly from observations with humans (butyrylcholinesterase and neuropathy target esterase-lysophospholipase) and studies with mice (cannabinoid CB1 receptor, carboxylesterase, lysophospholipase and platelet activating factor acetylhydrolase) and hen eggs (arylformamidase or kynurenine formamidase).
Pesticides most commonly shown to inhibit these targets in experimental vertebrates are chlorpyrifos and tribufos.
1(0,0,0,1) Details