Molecular Mechanisms of Nerve Injury and Neuropathic Pain

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Neurobiology and Clinical Neuroscience".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 2089

Special Issue Editors


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Guest Editor
Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea
Interests: brain; neuropathic pain; astrocyte; insular cortex; MEMRI

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Co-Guest Editor
Department of Physical Therapy, Korea University College of Health Science, Seoul 02841, Korea
Interests: brain; neuropathic pain

Special Issue Information

Dear Colleague,

Neuropathic pain is caused by lesions or diseases of the somatosensory system and is a major public health issue in the world. It is characterized by increased responses to nociceptive stimuli (hyperalgesia), unpleasant and abnormal sensations (dysesthesia), and pain in response to light tactile stimuli (allodynia). Studies show that neuropathic pain involves a series of pathophysiologic events when the nerve is damaged, including neuronal hyperexcitability, changes in perineuronal homeostasis, and neurogenic inflammation. Although the treatment for neuropathic pain remains a great challenge, progress has been made in identifying key molecules and their roles in pain modulation and processing.

The purpose of this topic is to gather original research articles, reviews, and perspectives to advance our understanding of novel neuropathic pain-related molecules and signaling pathways that can be used as therapeutic targets for the treatment of pain. Subtopics of this topic include but are not limited to:

  1. Novel molecules and their roles in neuropathic pain modulation and processing;
  2. Transcriptional factors, membrane proteins, and ion channels, which are implicated in the pathological changes in somatosensory system;
  3. Identification of potential therapeutic targets and pathological mechanisms of neuropathic pain.

Neuropathic pain includes cancer pain, diabetic neuropathic pain, chemotherapy-induced pain, chronic postoperative pain, postherpetic neuralgia, etc. Both animal models and human studies are welcome.

Dr. Myeounghoon Cha
Dr. Junesun Kim
Guest Editors

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Keywords

  • neuropathic pain
  • hyperalgesia
  • allodynia
  • dysesthesia
  • doral root ganglia
  • spinal cord
  • brain

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Published Papers (1 paper)

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Research

11 pages, 1546 KiB  
Article
Metabotropic Glutamate Receptor 5 in the Dysgranular Zone of Primary Somatosensory Cortex Mediates Neuropathic Pain in Rats
by Geehoon Chung, Yeong-Chan Yun, Chae Young Kim, Sun Kwang Kim and Sang Jeong Kim
Biomedicines 2022, 10(7), 1633; https://doi.org/10.3390/biomedicines10071633 - 7 Jul 2022
Cited by 2 | Viewed by 1757
Abstract
The primary somatosensory cortex (S1) plays a key role in the discrimination of somatic sensations. Among subdivisions in S1, the dysgranular zone of rodent S1 (S1DZ) is homologous to Brodmann’s area 3a of primate S1, which is involved in the processing of noxious [...] Read more.
The primary somatosensory cortex (S1) plays a key role in the discrimination of somatic sensations. Among subdivisions in S1, the dysgranular zone of rodent S1 (S1DZ) is homologous to Brodmann’s area 3a of primate S1, which is involved in the processing of noxious signals from the body. However, molecular changes in this region and their role in the pathological pain state have never been studied. In this study, we identified molecular alteration of the S1DZ in a rat model of neuropathic pain induced by right L5 spinal nerve ligation (SNL) surgery and investigated its functional role in pain symptoms. Brain images acquired from SNL group and control group in our previous study were analyzed, and behaviors were measured using the von Frey test, acetone test, and conditioned place preference test. We found that metabotropic glutamate receptor 5 (mGluR5) levels were significantly upregulated in the S1DZ contralateral to the nerve injury in the SNL group compared to the sham group. Pharmacological deactivation of mGluR5 in S1DZ ameliorated symptoms of neuropathic allodynia, which was shown by a significant increase in the mechanical paw withdrawal threshold and a decrease in the behavioral response to cold stimuli. We further confirmed that this treatment induced relief from the tonic-aversive state of chronic neuropathic pain, as a place preference memory associated with the treatment-paired chamber was formed in rats with neuropathic pain. Our data provide evidence that mGluR5 in the S1DZ is involved in the manifestation of abnormal pain sensations in the neuropathic pain state. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Nerve Injury and Neuropathic Pain)
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