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Abstract Title:

Nanoparticle-encapsulated emodin decreases diabetic neuropathic pain probably via a mechanism involving P2X3 receptor in the dorsal root ganglia.

Abstract Source:

Purinergic Signal. 2017 Aug 24. Epub 2017 Aug 24. PMID: 28840511

Abstract Author(s):

Lin Li, Xuan Sheng, Shanhong Zhao, Lifang Zou, Xinyao Han, Yingxin Gong, Huilong Yuan, Liran Shi, Lili Guo, Tianyu Jia, Shuangmei Liu, Bing Wu, Zhihua Yi, Hui Liu, Yun Gao, Guilin Li, Guodong Li, Chunping Zhang, Hong Xu, Shangdong Liang

Article Affiliation:

Lin Li

Abstract:

Diabetic peripheral neuropathy (DPN) is the most common complication of diabetes mellitus (DM). More than 90% of all cases of DM belong to type 2 diabetes mellitus (T2DM). Emodin is the main active component of Radix et rhizoma rhei and has anti-bacterial, anti-viral, anti-ulcerogenic, anti-inflammatory, and anti-cancer effects. Nanoparticle encapsulation of drugs is beneficial for drug targeting and bioavailability as well as for lowering drug toxicity side effects. The aim of this study was to investigate the effects of nanoparticle-encapsulated emodin (nano emodin) on diabetic neuropathic pain (DNP) mediated by the Purin 2X3 (P2X3) receptor in the dorsal root ganglia (DRG). Mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) values in T2DM rats were lower than those of control rats. MWT and TWL in T2DM rats treated with nano emodin were higher compared with those in T2DM rats. Expression levels of P2X3 protein and messenger RNA (mRNA) in the DRG of T2DM rats were higher than those of controls, while levels in T2DM rats treated with nano emodin were significantly lower than those of the T2DM rats. Phosphorylation and activation of ERK1/2 in the T2DM DRG were decreased by nano emodin treatment. Nano emodin significantly inhibited currents activated by the P2X3 agonistα,β-meATP in HEK293 cells transfected with the P2X3 receptor. Therefore, nano emodin treatment may relieve DNP by decreasing excitatory transmission mediated by the DRG P2X3 receptor in T2DM rats.

Study Type : Animal Study
Additional Links
Pharmacological Actions : Analgesics : CK(2569) : AC(470)

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