Back to Search
Start Over
Role of spinal glial cells in excitability of wide dynamic range neurons and the development of neuropathic pain with the L5 spinal nerve transection in the rats: Behavioral and electrophysiological study.
- Source :
-
Physiology & behavior [Physiol Behav] 2019 Oct 01; Vol. 209, pp. 112597. Date of Electronic Publication: 2019 Jul 02. - Publication Year :
- 2019
-
Abstract
- The activation of glial cells affects the neuronal excitability in the spinal cord. Therefore, in this study, we tried to find out the modulatory role of spinal glial cells in the excitability of wide dynamic range (WDR) neurons, induction of the long-term potentiation (LTP) and development of neuropathic pain by L5 spinal nerve transection model in the rats. Forty-eight adult male Wistar rats were used to measure the paw withdrawal threshold to mechanical stimuli and also, to carry out the spinal extracellular single unit recording experiments. In these experiments, spinal nerve ligation (SNL) and a daily injection of propentofylline (1 mg/kg, ip) as a glial cell inhibitor agent, 1 h following nerve ligation during 7-day post-SNL period, were performed. Our findings showed that the mechanical allodynia, and synaptically-evoked firing were caused LTP in the Aδ-fiber, C-fiber and lesser in the Aβ-fiber after high frequency stimulation. Daily injection of propentofylline considerably decreased LTP induction in the Aδ- and C-fibers (P < .001). It was concluded that glial cell activation mediates LTP induction in the spinal cord following peripheral nerve injury. It seems that pain modulatory role of glial cells is partly parallel to changes in neural excitability of the WDR neurons in the dorsal horn of spinal cord.<br /> (Copyright © 2019 Elsevier Inc. All rights reserved.)
- Subjects :
- Animals
Electrophysiological Phenomena
Hyperalgesia pathology
Ligation
Long-Term Potentiation
Male
Nerve Fibers, Myelinated pathology
Nerve Fibers, Unmyelinated pathology
Neuroprotective Agents pharmacology
Rats
Rats, Wistar
Synapses pathology
Xanthines pharmacology
Behavior, Animal
Neuralgia pathology
Neuralgia psychology
Neuroglia pathology
Neurons pathology
Spinal Cord pathology
Spinal Nerves injuries
Subjects
Details
- Language :
- English
- ISSN :
- 1873-507X
- Volume :
- 209
- Database :
- MEDLINE
- Journal :
- Physiology & behavior
- Publication Type :
- Academic Journal
- Accession number :
- 31271834
- Full Text :
- https://doi.org/10.1016/j.physbeh.2019.112597