지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2000.1
- 수록면
- 877 - 885 (9page)
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초록· 키워드
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Objective : The NOS inhibitors exhibit antinociceptive activity in rat model of neuropathic pain. NOS activity increases in the dorsal root ganglia(DRG) in neurop-athic pain. However, NOS activity decreases in the dorsal horn of spinal cord in the nerve injury models of neuropathic pain. To investigate whether the mechanism of decrease of NOS expression in the dorsal horn is related to a secondary effect resulting from increased NO production and likewise in the spinal DRG in the spinal nerve ligation model of neuropathic pain. Methods : We conducted behavioral tests for neuropathic pain, and nNOS immunohistochemistry and NADPH-diaphorase histochemistry after tight ligation of the 5th lumbar(L5) and 6th lumbar(L6) spinal nerves and L5 dorsal rhizotomy. Results : Typical neuropathic pain behaviors occurred 7 days after post-ligation in the neuropathic surgery group, but neuropathic pain behaviors in the dorsal rhizotomy group were absent or weak 7 days after post-operation. There was a decrease in the number of nNOS immunoreactive dorsal horn neurons on the both side(especially ipsilateral side) 7 days after post-ligation. The number of nNOS immunoreactive neurons in both side of the dorsal horn was not decreased 7 days after L5 dorsal rhizotomy. Conclusion : These data indicate that the changes in the injured DRG is essential for development and maintenance of neuropathic pain, and mechanism of decrease of nNOS expression in the dorsal horn is a secondary effect against the changes in the DRG including increased NO production in the spinal nerve ligation model of neuropathic pain.
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