Blockade of soluble epoxide hydrolase attenuates post-ischemic neuronal hyperexcitation and confers resilience against stroke with TrkB activation

doi:10.1038/s41598-017-18558-6

中山醫學大學機構典藏 CSMUIR > 醫學院 > 醫學系 > 期刊論文 > Item 310902500/18992

Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/18992

Title:	Blockade of soluble epoxide hydrolase attenuates post-ischemic neuronal hyperexcitation and confers resilience against stroke with TrkB activation
Authors:	Chang, Li-Hsin Lin, Hui-Ching Huang, Shiang-Suo Chen, I-Chih Chu, Kai-Wen Chih, Chun-Lien Liang, Yao-Wen Lee, Yi-Chung Chen, You-Yin Lee, Yi-Hsuan Lee, I-Hui
Contributors:	中山醫學大學
Date:	2018-12-01
Issue Date:	2018-03-21T09:54:52Z (UTC)
ISSN:	20452322
Abstract:	Inhibition and deletion of soluble epoxide hydrolase (sEH) has been suggested to ameliorate infarction in experimental ischemic stroke possibly via vasoactive epoxyeicosatrienoic acids. However, it is unknown whether the neuroprotective mechanisms involve alteration of post-ischemic neuronal transmission and neurotrophic signaling. We used a permanent middle cerebral artery occlusion (MCAO) model in adult wild-type mice with the sEH inhibitor 12-(3-adamantan-1-yl-ureido)dodecanoic acid (AUDA) post-treatment and in sEH knockout (sEH KO) mice. We found that sensorimotor recovery was significantly enhanced after MCAO in both AUDA-treated and sEH KO mice, with decreased sEH activity and brain infarction. Decreased post-ischemic long-term potentiation (iLTP) was observed in an ex vivo hippocampal oxygen-glucose deprivation model. Tropomyosin receptor kinase B (TrkB) activation, rather than glutamate receptor alteration, was consistently found after the different manipulations. Immunohistochemistry further revealed peri-infarct neuronal TrkB activation and microvasculature augmentation in AUDA-treated and sEH KO mice, suggesting parallel neurovascular enhancement. Mechanistically, pretreatment with a selective TrkB antagonist ANA12 countered the effect of iLTP attenuation induced by sEH deletion ex vivo and abolished the infarct reduction in vivo. Together, the neuroprotective effects of sEH inhibition and gene deletion can both be mediated partially via enhancement of TrkB signaling which attenuated post-ischemic neuroexcitation and neurological deficits. © 2017 The Author(s).
URI:	https://www.doi.org/10.1038/s41598-017-18558-6 https://ir.csmu.edu.tw:8080/ir/handle/310902500/18992
Relation:	Scientific Reportsvolume 8, Article number: 118 (2018)
Appears in Collections:	[醫學系] 期刊論文

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