In:
Frontiers in Pharmacology, Frontiers Media SA, Vol. 11 ( 2021-1-27)
Abstract:
Cynandione A, an acetophenone isolated from Cynanchum Wilfordii Radix, exhibits antineuropathic pain effect. This study further explored the target molecule and signaling mechanisms underlying cynandione-A-induced antineuropathic pain. Intrathecal injection of cynandione A significantly attenuated mechanical allodynia in neuropathic rats and substantially increased spinal expression of IL-10 and β-endorphin but not dynorphin A. Cynandione A treatment also enhanced expression of IL-10 and β-endorphin but not α7 nicotinic acetylcholine receptors (nAChRs) in cultured microglia. The IL-10 antibody attenuated cynandione-A-induced spinal or microglial gene expression of β-endorphin and mechanical allodynia, whereas the β-endorphin antiserum blocked cynandione-A-induced mechanical antiallodynia but not spinal or microglial IL-10 gene expression. The α7 nAChR antagonist methyllycaconitine significantly reduced cynandione-A-induced mechanical antiallodynia and spinal or microglial expression of IL-10 and β-endorphin. Furthermore, cynandione A stimulated microglial phosphorylation of PKA, p38, and CREB in an α7-nAChR-dependent manner, and treatment with their inhibitors attenuated cynandione-A-induced mechanical antiallodynia and spinal or microglial expression of IL-10 and β-endorphin. In addition, cynandione A stimulated spinal phosphorylation of the transcription factor STAT3, which was inhibited by methyllycaconitine, the PKA activation inhibitor or IL-10 antibody. The STAT3 inhibitor NSC74859 also abolished cynandione-A-induced mechanical antiallodynia and spinal expression of β-endorphin. These findings suggest that cynandione A suppresses neuropathic pain through α7-nAChR-dependent IL-10/β-endorphin signaling pathway in spinal microglia.
Type of Medium:
Online Resource
ISSN:
1663-9812
DOI:
10.3389/fphar.2020.614450
DOI:
10.3389/fphar.2020.614450.s001
DOI:
10.3389/fphar.2020.614450.s002
DOI:
10.3389/fphar.2020.614450.s003
DOI:
10.3389/fphar.2020.614450.s004
DOI:
10.3389/fphar.2020.614450.s005
DOI:
10.3389/fphar.2020.614450.s006
DOI:
10.3389/fphar.2020.614450.s007
DOI:
10.3389/fphar.2020.614450.s008
DOI:
10.3389/fphar.2020.614450.s009
DOI:
10.3389/fphar.2020.614450.s010
DOI:
10.3389/fphar.2020.614450.s011
DOI:
10.3389/fphar.2020.614450.s012
DOI:
10.3389/fphar.2020.614450.s013
DOI:
10.3389/fphar.2020.614450.s014
DOI:
10.3389/fphar.2020.614450.s015
DOI:
10.3389/fphar.2020.614450.s016
DOI:
10.3389/fphar.2020.614450.s017
DOI:
10.3389/fphar.2020.614450.s018
DOI:
10.3389/fphar.2020.614450.s019
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2587355-6
SSG:
15,3
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