Neuropathic pain following partial nerve injury in rats is suppressed by dietary soy

Yoram Shir, Alexander Ratner, Srinivasa N. Raja, James N. Campbell, Ze'ev Seltzer

Research output: Contribution to journalArticlepeer-review

Abstract

Some humans with partial nerve injury present a syndrome of neuropathic sensory disorders which depend on the sympathetic activity (sympathetically- maintained pain, SMP). Several years ago we introduced a rat model for SMP, produced by tightly ligating 1/3-1/2 of the sciatic nerve, leading to a partial denervation of the hindpaw (Partial Sciatic Ligation, PSL model) [Seltzer, Z., Dubner, R. and Shir, Y., Pain, 43 (1990) 245-250]. After working with this model for several years we encountered difficulties in replicating it although rat strain, vendor, gender, age and weight, surgical approach and sensory testing procedures were not changed. We report here that this variability can be attributed, at least in part, to the diet the animals consumed. Rats fed perioperatively with soy-containing diets expressed significantly weaker neuropathic sensory disorders compared to rats fed on soy-free diets. We conclude that diet may greatly affect experimental outcome in the PSL model.

Original languageEnglish (US)
Pages (from-to)73-76
Number of pages4
JournalNeuroscience Letters
Volume240
Issue number2
DOIs
StatePublished - Jan 9 1998

Keywords

  • Allodynia
  • Diet
  • Hyperalgesia
  • Neuropathic pain
  • Pain modulation
  • Partial nerve injury
  • Phytoestrogens
  • Rat

ASJC Scopus subject areas

  • Neuroscience(all)

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