• Neuroreport · Jan 2001

    Decrease in spinal CGRP and substance P is not related to neuropathic pain in a rat model.

    • H S Na, H J Kim, B Sung, S K Back, D Y Kim, J S Kim, and S K Hong.
    • Neuroscience Research Institute and Department of Physiology, Korea University College of Medicine, Seoul.
    • Neuroreport. 2001 Jan 22; 12 (1): 175-8.

    AbstractWe tested the hypothesis that the decrease in spinal levels of SP and CGRP after peripheral nerve injury is related to neuropathic pain. We compared two groups of rats, both of which were subjected to unilateral transection of the inferior and superior caudal trunks between the S1 and S2 spinal nerves. One group exhibited well-developed neuropathic signs after the nerve injury, whereas the other group showed poorly developed signs despite the same nerve injury. The decrease in immunoreactivity of CGRP and SP in the S1 dorsal horn (injured segment) was not significantly different between the two groups. These results suggest that the decrease in spinal levels of CGRP and SP after peripheral nerve injury is not related to neuropathic pain.

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