Silencing of spinal Trpv1 attenuates neuropathic pain in rats by inhibiting CAMKII expression and ERK2 phosphorylation

Scientific Reports
Shao-Hui GuoYong-Xing Yao

Abstract

Accumulating evidence suggests a potential role of transient receptor potential vanilloid 1 (TRPV1) channels in inflammatory and cancer-related pain. However, the role of TRPV1 in the maintenance of neuropathic pain remains elusive. The current study investigated the effects of transient Trpv1 gene silencing using a small interference RNA (siRNA) on neuropathic pain induced by chronic constriction injury (CCI) of the sciatic nerve in rats. Seven days after CCI, the TRPV1 siRNA was intrathecally administered (5 µg/15 µl, once daily for 2 days). TRPV1 and Ca2+/calmodulin-dependent protein kinase II (CAMKII) expression and extracellular signal-regulated kinase (ERK) phosphorylation in the spinal cord were detected using western blotting. The thresholds to mechanical and thermal stimuli were determined before and after intrathecal TRPV1 siRNA administration. TRPV1 and CAMKII expression and ERK2 phosphorylation in the spinal cord were upregulated after CCI. Intrathecal administration of the TRPV1 siRNA not only attenuated behavioural hyperalgesia but also reduced the expression of TRPV1 and CAMKII, as well as ERK2 phosphorylation. Based on these results, silencing of the TRPV1 gene in the spinal cord attenuates the maintenance of ne...Continue Reading

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Citations

Sep 24, 2020·Pharmacology Research & Perspectives·Geovanna Nallely Quiñonez-BastidasAndrés Navarrete
Oct 11, 2020·International Journal of Molecular Sciences·Marta BrykKatarzyna Starowicz
Feb 4, 2021·Stem Cells International·Xiaofeng BaiXia Zhang
May 1, 2021·Animals : an Open Access Journal From MDPI·Alison SmallIan Colditz

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Methods Mentioned

BETA
transfection
protein assay

Software Mentioned

SPSS
Quantity One

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