TY - JOUR
T1 - Soy-containing diet suppresses chronic neuropathic sensory disorders in rats
AU - Shir, Yoram
AU - Sheth, Rishi
AU - Campbell, James N.
AU - Raja, Srinivasa N.
AU - Seltzer, Ze'ev
PY - 2001
Y1 - 2001
N2 - Partial sciatic nerve ligation (PSL) in rodents produces chronic neuropathic sensory disorders resembling neuropathic pain in humans. We previously reported that levels of allodynia and hyperalgesia after PSL injury were markedly attenuated by consumption of soy-containing diets. Here we aimed to show that dietary effect on pain behavior is not specific to a certain laboratory. For this purpose, experiments were conducted in a different laboratory (Baltimore rather than Jerusalem) and a different rat strain (Wistar rather than Sabra), with additional and different testing methods (radiant heat from a lamp rather than a CO2 laser). Rats were fed two soy-free diets and a soy-containing one for 28 days. The sensitivity of rats to nonnoxious and noxious stimuli was determined before PSL injury, and levels of neuropathic sensory disorders were determined after it. We found that consuming the soy-containing diet prevented development of tactile and heat allodynia, but not mechanical hyperalgesia. This dietary effect was not correlated with calorie intake and weight gain or dietary concentration of fat and carbohydrates. We conclude that, regardless of experimental site, diet markedly affects chronic neuropathic sensory disorders in rats and should be standardized in animal models of pain.
AB - Partial sciatic nerve ligation (PSL) in rodents produces chronic neuropathic sensory disorders resembling neuropathic pain in humans. We previously reported that levels of allodynia and hyperalgesia after PSL injury were markedly attenuated by consumption of soy-containing diets. Here we aimed to show that dietary effect on pain behavior is not specific to a certain laboratory. For this purpose, experiments were conducted in a different laboratory (Baltimore rather than Jerusalem) and a different rat strain (Wistar rather than Sabra), with additional and different testing methods (radiant heat from a lamp rather than a CO2 laser). Rats were fed two soy-free diets and a soy-containing one for 28 days. The sensitivity of rats to nonnoxious and noxious stimuli was determined before PSL injury, and levels of neuropathic sensory disorders were determined after it. We found that consuming the soy-containing diet prevented development of tactile and heat allodynia, but not mechanical hyperalgesia. This dietary effect was not correlated with calorie intake and weight gain or dietary concentration of fat and carbohydrates. We conclude that, regardless of experimental site, diet markedly affects chronic neuropathic sensory disorders in rats and should be standardized in animal models of pain.
UR - http://www.scopus.com/inward/record.url?scp=0035076596&partnerID=8YFLogxK
U2 - 10.1097/00000539-200104000-00042
DO - 10.1097/00000539-200104000-00042
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C2 - 11273945
AN - SCOPUS:0035076596
SN - 0003-2999
VL - 92
SP - 1029
EP - 1034
JO - Anesthesia and Analgesia
JF - Anesthesia and Analgesia
IS - 4
ER -