Galanin and spinal nociceptive mechanisms: Recent results from transgenic and knock-out models

Zsuzsanna Wiesenfeld-Hallin, Xiao Jun Xu, Jacqueline Crawley, Tomas Hökfelt

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Genetically modified mice with transgenic overexpression of galanin or depletion of genes for galanin or galanin receptors have become available, providing a new approach for analyzing the role of galanin in nociception. Mice overexpressing galanin had a moderate heat hypoalgesia, reduced spinal sensitization after repetitive C-fiber stimulation and reduced development of neuropathic pain-like behavior after sciatic nerve injury. On the other hand, mice lacking the GALR1 receptor (Galr1-/-) exhibited only slight increase in heat nociception in the hot plate, but not tail flick, test and showed no increase in spinal sensitization. The duration, but not magnitude, of neuropathic pain-like behaviors, was increased in Galr1-/- mice after nerve injury. These results support an inhibitory effect of galanin on nociception, but the physiological role played by galanin via GALR1 receptors needs to be further studied.

Original languageEnglish (US)
Pages (from-to)207-210
Number of pages4
JournalNeuropeptides
Volume39
Issue number3
DOIs
StatePublished - Jun 2005
Externally publishedYes

Keywords

  • Galanin overexpression
  • Heat
  • Nerve injury
  • Nociception
  • Pain

ASJC Scopus subject areas

  • Endocrinology
  • Clinical Neurology
  • Endocrinology, Diabetes and Metabolism
  • Cellular and Molecular Neuroscience
  • Neuroscience(all)
  • Biochemistry

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