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Abstract Title:

Antiallodynic Effect of Intrathecal Korean Red Ginseng in Cisplatin-Induced Neuropathic Pain Rats.

Abstract Source:

Pharmacology. 2019 Oct 2:1-8. Epub 2019 Oct 2. PMID: 31578020

Abstract Author(s):

Yeo Ok Kim, Ji A Song, Woong Mo Kim, Myung Ha Yoon

Article Affiliation:

Yeo Ok Kim

Abstract:

BACKGROUND: Chemotherapy-induced neuropathic pain (CINP) is a serious side effect of chemotherapy. Korean Red Ginseng (KRG) is a popular herbal medicine in Asian countries. We examined the therapeutic potential of intrathecally administered KRG for CINP and clarified the mechanisms of action with regard to 5-hydroxytryptamine (5-HT)7 receptor at the spinal level.

METHODS: CINP was evoked by intraperitoneal injection of cisplatin in male Sprague-Dawley rats. After examining the effects of intrathecally administered KRG on CINP, 5-HT receptor antagonist (dihydroergocristine [DHE]) was pretreated to determine the involvement of 5-HT receptor. In addition, intrathecal 5-HT7 receptor antagonist (SB269970) was administered to define the role of 5-HT7 receptor on the effect of KRG. 5-HT7 receptor mRNA expression levels and 5-HT concentrations were examined in the spinal cord.

RESULTS: Intrathecally administered KRG produced a limited, but a dose-dependent, antiallodynic effect. Intrathecally administered DHE antagonized the antiallodynia caused by KRG. Furthermore, intrathecal SB269970 also reversed the effect of KRG. No changes in 5-HT7 receptor mRNA expression were seen in the dorsal horn of the spinal cord after cisplatin injection. After injecting cisplatin, 5-HT levels were decreased in the spinal cord, whereas those of 5-HT were increased by intrathecal KRG.

CONCLUSIONS: Intrathecally administered KRG decreased CINP. In addition, spinal 5-HT7 receptors contributed to the antiallodynic effect of KRG.

Study Type : Animal Study

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