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Evidence that gabapentin reduces neuropathic pain by inhibiting the spinal release of glutamate.
J Neurochem. 2005 Aug; 94(4):1131-9.JN

Abstract

Gabapentin is an anticonvulsant that successfully treats many neuropathic pain syndromes, although the mechanism of its antihyperalgesic action remains elusive. This study aims to help delineate gabapentin's antihyperalgesic mechanisms. We assessed the effectiveness of gabapentin at decreasing mechanical and cold hypersensitivity induced in a rat model of neuropathic pain. Thus, we compared the effectiveness of pre- or post-treatment with systemic or intrathecal (i.t.) gabapentin at reducing the development and maintenance of the neuropathic pain symptoms. Gabapentin successfully decreased mechanical and cold hypersensitivity, both as a pretreatment and post-treatment. Furthermore, both i.t. and systemic administration of gabapentin were effective in reducing the behavioral hypersensitivity; however, the i.t. administration was superior to the systemic. We also examined gabapentin's effects at inhibiting hindpaw formalin-induced release of excitatory amino acids (EAAs) in the spinal cord dorsal horn (SCDH) both in naïve rats and in rats with neuropathic pain. We present the first evidence that gabapentin reduces the formalin-induced release of both glutamate and aspartate in SCDH. Furthermore, i.t. gabapentin reduces the enhanced noxious stimulus-induced spinal release of glutamate seen in neuropathic rats. These data suggest that gabapentin reduces neuropathic pain symptoms by inhibiting the release of glutamate in the SCDH.

Authors+Show Affiliations

Departments of Anesthesia, Neurology and Neurosurgery and Psychology, McGill University, Montreal, Canada. terence.coderre@mcgill.caNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16092950

Citation

Coderre, Terence J., et al. "Evidence That Gabapentin Reduces Neuropathic Pain By Inhibiting the Spinal Release of Glutamate." Journal of Neurochemistry, vol. 94, no. 4, 2005, pp. 1131-9.
Coderre TJ, Kumar N, Lefebvre CD, et al. Evidence that gabapentin reduces neuropathic pain by inhibiting the spinal release of glutamate. J Neurochem. 2005;94(4):1131-9.
Coderre, T. J., Kumar, N., Lefebvre, C. D., & Yu, J. S. (2005). Evidence that gabapentin reduces neuropathic pain by inhibiting the spinal release of glutamate. Journal of Neurochemistry, 94(4), 1131-9.
Coderre TJ, et al. Evidence That Gabapentin Reduces Neuropathic Pain By Inhibiting the Spinal Release of Glutamate. J Neurochem. 2005;94(4):1131-9. PubMed PMID: 16092950.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evidence that gabapentin reduces neuropathic pain by inhibiting the spinal release of glutamate. AU - Coderre,Terence J, AU - Kumar,Naresh, AU - Lefebvre,Celeste D, AU - Yu,Jonathan S C, PY - 2005/8/12/pubmed PY - 2005/9/28/medline PY - 2005/8/12/entrez SP - 1131 EP - 9 JF - Journal of neurochemistry JO - J Neurochem VL - 94 IS - 4 N2 - Gabapentin is an anticonvulsant that successfully treats many neuropathic pain syndromes, although the mechanism of its antihyperalgesic action remains elusive. This study aims to help delineate gabapentin's antihyperalgesic mechanisms. We assessed the effectiveness of gabapentin at decreasing mechanical and cold hypersensitivity induced in a rat model of neuropathic pain. Thus, we compared the effectiveness of pre- or post-treatment with systemic or intrathecal (i.t.) gabapentin at reducing the development and maintenance of the neuropathic pain symptoms. Gabapentin successfully decreased mechanical and cold hypersensitivity, both as a pretreatment and post-treatment. Furthermore, both i.t. and systemic administration of gabapentin were effective in reducing the behavioral hypersensitivity; however, the i.t. administration was superior to the systemic. We also examined gabapentin's effects at inhibiting hindpaw formalin-induced release of excitatory amino acids (EAAs) in the spinal cord dorsal horn (SCDH) both in naïve rats and in rats with neuropathic pain. We present the first evidence that gabapentin reduces the formalin-induced release of both glutamate and aspartate in SCDH. Furthermore, i.t. gabapentin reduces the enhanced noxious stimulus-induced spinal release of glutamate seen in neuropathic rats. These data suggest that gabapentin reduces neuropathic pain symptoms by inhibiting the release of glutamate in the SCDH. SN - 0022-3042 UR - https://www.unboundmedicine.com/medline/citation/16092950/Evidence_that_gabapentin_reduces_neuropathic_pain_by_inhibiting_the_spinal_release_of_glutamate_ L2 - https://doi.org/10.1111/j.1471-4159.2005.03263.x DB - PRIME DP - Unbound Medicine ER -