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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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单位: [1]Huazhong Univ Sci & Technol,Tongji Hosp,Tongji Med Coll,Dept Anaesthesiol & Pain Med,Jiefang Ave 1095,Wuhan 430030,Hubei,Peoples R China [2]Huazhong Univ Sci & Technol,Tongji Hosp,Tongji Med Coll,Dept Ophthalmol,Wuhan 430030,Peoples R China [3]Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Anaesthesiol, Wuhan 430022, Peoples R China
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关键词: Antinociception 14 15-Epoxyeicosatrienoic acid Central post-stroke pain Antiinflammation Anti-apoptosis effect

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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 neuro inflammation-and apoptosis-related protein expressions in the per-lesion site of CPSP and Sham rats. SpragueDawley rats were randomly divided into five groups, as follows: vehicle; EET at 0.025, 0.05, and 0.1 mu g; and EET (0.1 mu g) + 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.

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出版当年[2021]版:
大类 | 3 区 医学
小类 | 3 区 生化与分子生物学 3 区 神经科学
最新[2025]版:
大类 | 3 区 医学
小类 | 2 区 生化与分子生物学 3 区 神经科学
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出版当年[2020]版:
Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Q2 NEUROSCIENCES
最新[2023]版:
Q1 NEUROSCIENCES Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

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第一作者单位: [1]Huazhong Univ Sci & Technol,Tongji Hosp,Tongji Med Coll,Dept Anaesthesiol & Pain Med,Jiefang Ave 1095,Wuhan 430030,Hubei,Peoples R China [2]Huazhong Univ Sci & Technol,Tongji Hosp,Tongji Med Coll,Dept Ophthalmol,Wuhan 430030,Peoples R China
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