Dextromethorphan Suppresses Lipopolysaccharide-Induced Epigenetic Histone Regulation in the Tumor Necrosis Factor-α Expression in Primary Rat Microglia

Dextromethorphan Suppresses Lipopolysaccharide-Induced Epigenetic Histone Regulation in the Tumor Necrosis Factor-α Expression in Primary Rat Microglia
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右美沙芬抑制脂多糖诱导的原代大鼠小胶质细胞肿瘤坏死因子-α 表达的表观遗传组蛋白调节

DOI:
10.1155/2020/9694012
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发表时间:
2020-12-05
影响因子:
4.6
通讯作者:
Yang SN
Yang SN
中科院分区:
医学3区
文献类型:
--
作者:
Yang YN;Yang YC;Wu PL;Yang CH;Kuo KC;Yang SN

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小胶质细胞的活化在导致炎症介导的神经退行性疾病的级联反应中起重要作用。精确的治疗需要找到预防小胶质细胞活化和预防炎症介导的神经元损伤的可行药物。据报道,右美沙芬(DM)在脂多糖(LPS)刺激的动物中具有神经保护作用;然而,目前尚不清楚小胶质细胞中的表观遗传调节机制是否参与DM介导的神经保护作用。在这项研究中,DM同时抑制LPS诱导的肿瘤坏死因子-(TNF-)α表达的激活和随后的caspase-3信号转导在原代小胶质细胞中与显著的形态学变化相关。DM的治疗作用部位还包括TNF-α基因启动子区H3 K4修饰的差异增强三甲基化。总之,DM可能通过小胶质细胞中TNF-α表达的差异表观遗传组蛋白修饰发挥神经保护和抗炎作用,因此可能为炎症引起的神经退行性疾病的试验性治疗策略提供潜在的有益作用。
The activation of microglial cells plays an important role in the cascade of events leading to inflammation-mediated neurodegenerative disorders. Precision therapeutics require that adjunctively feasible drugs be found to prevent microglial cell activation and prevent inflammation-mediated neuronal injury. Dextromethorphan (DM) has been reported to possess neuroprotective effects in lipopolysaccharide- (LPS-) stimulated animals; however, it remains unclear whether epigenetic regulatory mechanisms in microglial cells are involved in such DM-mediated neuroprotective effects. In this study, DM simultaneously suppressed LPS-induced activation of tumor necrosis factor- (TNF-) α expression and subsequent caspase-3 signaling in primary microglial cells associated with notable morphological changes. Furthermore, therapeutic action sites of DM involved differential enhanced trimethylation of H3K4 modifications in the promoter region of tnf-α gene locus in primary microglial cells. In summary, DM may exert neuroprotective and anti-inflammatory effects through differential epigenetic histone modifications of TNF-α expression in microglial cells and might therefore raise the possibility of providing an adjunctively beneficial role for a tentative therapeutic strategy in neurodegenerative diseases resulting from inflammation.
含有含二含胆碱磷脂的二十二碳六烯酸磷脂可在体外和小胶质细胞中调节LPS诱导的神经炎症。
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