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Glycine receptor reduction within segmental gray matter in a rat model of neuropathic pain
Authors:Jr. Richard Simpson  Wen Huang
Affiliation:Department of Neurosurgery, Baylor College of Medicine, Houston, TX, USA
Abstract:Abstract

Glycine is an amino acid neurotransmitter found in the spinal cord and is closely associated with interneurons that modulate afferent activity. We have previously shown that low segmental glycine concentrations or blockade of normal glycinergic activity lowers the threshold for pain thresholds. In addition, intrathecal glycine infusion increases the pain threshold in animal models of neuropathic pain. However, the role of the glycine receptor in neuropathic pain is not clear and is the basis for the current study. Using a unilateral sciatic nerve constriction injury model of neuropathic pain, the strychnine sensitive glycine receptor population was studied using immunohistochemical techniques. Glycine receptors are reduced in number in the dorsal horn bilaterally in injured animals. Glycine and related compounds are potentially valuable agents for treating chronic pain conditions in humans. A better understanding of glycine-receptor interactions should prove valuable as these compounds are studied in greater depth. [Neural Res 1998; 20: 161–168]
Keywords:Glycine receptor  Neuropathic pain
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