Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect
Copyright © 2022. Published by Elsevier Ltd..
Central post stroke pain (CPSP) is an intractable neuropathic pain syndrome that occurs after the acute focal lesion of the central nervous system (CNS) due to a cerebrovascular cause. Epoxyeicosatrienoic acids (EETs) exert many pharmacological effects in vivo and in vitro, such as anti-apoptosis, anti-inflammatory, and anti-oxidative stress. Neuroinflammation and apoptosis are the potential pathophysiological mechanisms of neuropathic pain. This study aimed to investigate whether 14,15-EET has an antinociception effect on CPSP rats through its anti-inflammation and anti-apoptosis mechanisms. Rats were treated with type IV collagenase (CPSP group) or saline (Sham group) via injection with a Hamilton syringe into the ventral posterior lateral nucleus (VPL) according to the stereotaxic coordinates. We first tested the mechanical withdrawal threshold, as well as neuroinflammation- and apoptosis-related protein expressions in the per-lesion site of CPSP and Sham rats. Sprague-Dawley rats were randomly divided into five groups, as follows: vehicle; EET at 0.025, 0.05, and 0.1 μg; and EET (0.1 μg) + EEZE (3.25 ng). EET or and vehicle were administered into VPL nuclei three consecutive days after hemorrhagic stroke. Immunostaining, ELISA, and Western blot were performed to evaluate neuroinflammation and apoptosis. Hemorrhagic stroke induced mechanical allodynia, glial activation, neuroinflammation, and apoptosis-related protein upregulation. However, early treatment with 14,15-EET inhibited glial cell activation, decreased proinflammatory cytokines and apoptosis-related protein, and alleviated the pain behavior of CPSP rats. Our results provided strong evidence that antinociception produced by 14,15-EET is partly mediated by the inhibition of neuroinflammation and apoptosis.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:154 |
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| Enthalten in: |
Neurochemistry international - 154(2022) vom: 01. März, Seite 105291 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Chen, Xuhui [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 07.04.2022 Date Revised 07.04.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.neuint.2022.105291 |
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| Förderinstitution / Projekttitel: |
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| 245 | 1 | 0 | |a Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect |
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| 520 | |a Copyright © 2022. Published by Elsevier Ltd. | ||
| 520 | |a Central post stroke pain (CPSP) is an intractable neuropathic pain syndrome that occurs after the acute focal lesion of the central nervous system (CNS) due to a cerebrovascular cause. Epoxyeicosatrienoic acids (EETs) exert many pharmacological effects in vivo and in vitro, such as anti-apoptosis, anti-inflammatory, and anti-oxidative stress. Neuroinflammation and apoptosis are the potential pathophysiological mechanisms of neuropathic pain. This study aimed to investigate whether 14,15-EET has an antinociception effect on CPSP rats through its anti-inflammation and anti-apoptosis mechanisms. Rats were treated with type IV collagenase (CPSP group) or saline (Sham group) via injection with a Hamilton syringe into the ventral posterior lateral nucleus (VPL) according to the stereotaxic coordinates. We first tested the mechanical withdrawal threshold, as well as neuroinflammation- and apoptosis-related protein expressions in the per-lesion site of CPSP and Sham rats. Sprague-Dawley rats were randomly divided into five groups, as follows: vehicle; EET at 0.025, 0.05, and 0.1 μg; and EET (0.1 μg) + EEZE (3.25 ng). EET or and vehicle were administered into VPL nuclei three consecutive days after hemorrhagic stroke. Immunostaining, ELISA, and Western blot were performed to evaluate neuroinflammation and apoptosis. Hemorrhagic stroke induced mechanical allodynia, glial activation, neuroinflammation, and apoptosis-related protein upregulation. However, early treatment with 14,15-EET inhibited glial cell activation, decreased proinflammatory cytokines and apoptosis-related protein, and alleviated the pain behavior of CPSP rats. Our results provided strong evidence that antinociception produced by 14,15-EET is partly mediated by the inhibition of neuroinflammation and apoptosis | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a 14,15-Epoxyeicosatrienoic acid | |
| 650 | 4 | |a Anti-apoptosis effect | |
| 650 | 4 | |a Antiinflammation | |
| 650 | 4 | |a Antinociception | |
| 650 | 4 | |a Central post-stroke pain | |
| 650 | 7 | |a Anti-Inflammatory Agents |2 NLM | |
| 650 | 7 | |a 14,15-epoxy-5,8,11-eicosatrienoic acid |2 NLM | |
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| 650 | 7 | |a 8,11,14-Eicosatrienoic Acid |2 NLM | |
| 650 | 7 | |a FC398RK06S |2 NLM | |
| 700 | 1 | |a Li, Zuofan |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Bo |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Tongtong |e verfasserin |4 aut | |
| 700 | 1 | |a Yao, Wenlong |e verfasserin |4 aut | |
| 700 | 1 | |a Wan, Li |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Chuanhan |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yue |e verfasserin |4 aut | |
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