Epigenetic restoration of voltage-gated potassium channel Kv1.2 alleviates nerve injury-induced neuropathic pain.
Kv1.2
dorsal root ganglion
miRNA
neuropathic pain
spinal dorsal horn
Journal
Journal of neurochemistry
ISSN: 1471-4159
Titre abrégé: J Neurochem
Pays: England
ID NLM: 2985190R
Informations de publication
Date de publication:
02 2021
02 2021
Historique:
received:
17
04
2020
revised:
25
06
2020
accepted:
25
06
2020
pubmed:
6
7
2020
medline:
13
4
2021
entrez:
5
7
2020
Statut:
ppublish
Résumé
Voltage-gated potassium channels (Kv) are important regulators of neuronal excitability for its role of regulating resting membrane potential and repolarization. Recent studies show that Kv channels participate in neuropathic pain, but the detailed underlying mechanisms are far from being clear. In this study, we used siRNA, miR-137 agomir, and antagomir to regulate the expression of Kv1.2 in spinal cord and dorsal root ganglia (DRG) of naïve and chronic constriction injury (CCI) rats. Kv currents and neuron excitability in DRG neurons were examined by patch-clamp whole-cell recording to verify the change in Kv1.2 function. The results showed that Kv1.2 was down-regulated in DRG and spinal dorsal horn (SDH) by CCI. Knockdown of Kv1.2 by intrathecally injecting Kcna2 siRNA induced significant mechanical and thermal hypersensitivity in naïve rats. Concomitant with the down-regulation of Kv1.2 was an increase in the expression of the miR-137. The targeting and regulating of miR-137 on Kcna2 was verified by dual-luciferase reporter system and intrathecal injecting miR-137 agomir. Furthermore, rescuing the expression of Kv1.2 in CCI rats, achieved through inhibiting miR-137, restored the abnormal Kv currents and excitability in DRG neurons, and alleviated mechanical allodynia and thermal hyperalgesia. These results indicate that the miR-137-mediated Kv1.2 impairment is a crucial etiopathogenesis for the nerve injury-induced neuropathic pain and can be a novel potential therapeutic target for neuropathic pain management.
Substances chimiques
Kv1.2 Potassium Channel
0
MIRN137 microRNA, rat
0
MicroRNAs
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
367-378Commentaires et corrections
Type : ErratumIn
Informations de copyright
© 2020 International Society for Neurochemistry.
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