University of Khartoum

Loss of Muscarinic M4 receptors in Spinal Cord of Arthritic Rats: Implications for A Role of M4 Receptors in Pain Response

Loss of Muscarinic M4 receptors in Spinal Cord of Arthritic Rats: Implications for A Role of M4 Receptors in Pain Response

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Title: Loss of Muscarinic M4 receptors in Spinal Cord of Arthritic Rats: Implications for A Role of M4 Receptors in Pain Response
Author: El-Bakr, Nahid; Mulugeta, Ezra; Elhassan, Adlan
Abstract: Changes in the levels of muscarinic M4 receptors in spinal cord of acute and chronic arthritic rats (animal models of pain) were studied by receptor autoradiography using muscarinic M4 receptor subtype selective ligand. Arthritis was induced in female Lewis rats by single intradermal injection of heat-killed Mycobacterium butyricum and sacrificed 12 days (acute group) and 30 days (chronic and control groups) after induction of arthritis. Our results demonstrate significant reduction in the level of M4 receptors in the spinal cord (Rexed laminae I–X) of acute and chronic arthritic rats compared to controls. These findings suggest that the muscarinic M4 receptor subtype may be involved in cholinergic mechanisms of analgesia
URI: http://khartoumspace.uofk.edu/123456789/17250
Date: 2015-11-19


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