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Zhongguo Yao Li Xue Bao. 1997 Sep; 18(5): 474-6.

[Somatostatin and electroacupuncture inhibited c-fos expression in spinal cord of arthritic rats]

Ruan HZ, Li XC, Li HD, Zhao BY.

Department of Physiology, Third Military Medical College, Chongqing, China.

AIM: To observer the effect of intrathecal injection of somatostatin (Som) associated with electroacupuncture (EA) at "Jiaji" points on c-fos protein expression of spinal cord in pain rats. METHODS: Rats with adjuvant arthritis were used as pain model and the c-fos-like immunoreactivity (FLI) was detected by immunohistochemistry. RESULTS: The c-fos protein expression induced by arthritis were found in all of the I-X laminae of ipsilateral spinal cord of rats, and most of the labeled cells were located in the laminae I-II and V-VI. Som and EA suppressed the c-fos expression and the lessening of FLI cells in the spinal cord. CONCLUSION: Pathological pain following arthritis activated pain sensitive neurons (PSN) and evoked c-fos expression in spinal cord, Som and EA suppressed activities of these PSN, producing the effect of analgesia.

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