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The present study assessed the effect of a single subcutaneous injection of resiniferatoxin (RTX), an ultrapotent capsaicin analogue, on the activity of spinal cholecystokinin (CCK) systems, by using electrophysiological and in situ hybridization techniques. Subcutaneous RTX at 0.3 mg/kg, but not vehicle, produced marked thermal hypoalgesia in rats on the hot plate and tail flick tests. Partial recovery...
We have previously reported that we have observed chronic pain-like response to light mechanical stimuli (allodynia) in rats after severe spinal cord ischemia, which resembles some painful conditions in chronic spinally injured patients and is not relieved by a number of conventional analgesics used for treating chronic neuropathic pain. In the present study, we tested the effects of the non-selective...
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