Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect
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.
基金:
National Natural Science Foundation of China [81600965, 82071246]
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
通讯作者:
推荐引用方式(GB/T 7714):
Chen Xuhui,Li Zuofan,Zhang Bo,et al.Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect[J].NEUROCHEMISTRY INTERNATIONAL.2022,154:doi:10.1016/j.neuint.2022.105291.
APA:
Chen, Xuhui,Li, Zuofan,Zhang, Bo,Liu, Tongtong,Yao, Wenlong...&Zhang, Yue.(2022).Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect.NEUROCHEMISTRY INTERNATIONAL,154,
MLA:
Chen, Xuhui,et al."Antinociception role of 14,15-epoxyeicosatrienoic acid in a central post-stroke pain model in rats mediated by anti-inflammation and anti-apoptosis effect".NEUROCHEMISTRY INTERNATIONAL 154.(2022)