Protein Information

Name M2 muscarinic acetylcholine receptor
Synonyms CHRM 2; CHRM2; HM2; M2 muscarinic acetylcholine receptor; Muscarinic M2 receptor; Muscarinic acetylcholine receptor M2; M2 muscarinic acetylcholine receptors; Muscarinic M2 receptors…

Compound Information

Name chlorpyrifos
CAS

Reference List

PubMed Abstract RScore(About this table)
18800293 Udarbe Zamora EM, Liu J, Pope CN: Effects of chlorpyrifos oxon on M2 muscarinic receptor internalization in different cell types. J Toxicol Environ Health A. 2008;71(21):1440-7.

The muscarinic M2 receptor is a member of the G protein-coupled receptor (GPCR) superfamily.
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12937891 Abou-Donia MB, Abdel-Rahman A, Goldstein LB, Dechkovskaia AM, Shah DU, Bullman SL, Khan WA: Sensorimotor deficits and increased brain nicotinic acetylcholine receptors following exposure to chlorpyrifos and/or nicotine in rats. Arch Toxicol. 2003 Aug;77(8):452-8. Epub 2003 Apr 26.

This was further augmented with combined exposure, which caused a modest but significant increase in m2 muscarinic acetylcholine receptors (m2-mAChR) ligand binding in the cortex.
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11275418 Bomser JA, Casida JE: Diethylphosphorylation of rat cardiac M2 muscarinic receptor by chlorpyrifos oxon in vitro. Toxicol Lett. 2001 Feb 3;119(1):21-6.

As a secondary effect, CPO is known to compete with agonist binding to the M2 muscarinic acetylcholine receptor (mAChR).
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16256208 Slotkin TA, Tate CA, Cousins MM, Seidler FJ: Imbalances emerge in cardiac autonomic cell signaling after neonatal exposure to terbutaline or chlorpyrifos, alone or in combination. Brain Res Dev Brain Res. 2005 Dec 7;160(2):219-30. Epub 2005 Oct 26.

Terbutaline also reduced expression of m2 muscarinic acetylcholine receptors and suppressed their ability to inhibit AC.
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