GS-KG9 Ameliorates Diabetic Neuropathic Pain Induced by Streptozotocin in Rats

Overview

Journal J Ginseng Res

Date 2019 Jan 22

PMID 30662294

Citations 11

Authors

Jee Youn Lee

Hae Young Choi

Chan Sol Park

Mi Kyung Pyo

Tae Young Yune

Go Woon Kim

Sung Hyun Chung

Affiliations

Soon will be listed here.

Abstract

Background: Diabetic neuropathy is one of the most devastating ailments of the peripheral nervous system. Neuropathic pain develops in ∼30% of diabetics. Here, we examined the suppressive effect of GS-KG9 on neuropathic pain induced by streptozotocin (STZ).

Methods: Hyperglycemia was induced by intraperitoneal injection of STZ. Rats showing blood glucose level > 250 mg/dL were divided into five groups, and treatment groups received oral saline containing GS-KG9 (50 mg/kg, 150 mg/kg, or 300 mg/kg) twice daily for 4 wk. The effects of GS-KG9 on pain behavior, microglia activation in the lumbar spinal cord and ventral posterolateral (VPL) nucleus of the thalamus, and c-Fos expression in the dorsal horn of the lumbar spinal cord were examined.

Results: The development of neuropathic pain began at Day 5 and peaked at Week 4 after STZ injection. Mechanical and thermal pains were both significantly attenuated in GS-KG9-treated groups from 10 d after STZ injection as compared to those in the STZ control. GS-KG9 also repressed microglia activation in L4 dorsal horn and VPL region of the thalamus. In addition, increase in c-Fos-positive cells within L4 dorsal horn lamina I and II of the STZ control group was markedly alleviated by GS-KG9.

Conclusion: These results suggest that GS-KG9 effectively relieves STZ-induced neuropathic pain by inhibiting microglial activation in the spinal cord dorsal horn and VPL region of the thalamus.

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