Department of Human Anatomy and Embryology, Faculty of Medicine, Assiut University, Assiut, Egypt; Department of Anatomy, Unaizah College of Medicine, Qassim University, Unaizah Al Qassim Region, Saudi Arabia.
Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt.
Tissue Cell. 2019 Oct;60:1-13. doi: 10.1016/j.tice.2019.07.007. Epub 2019 Jul 23.
Coenzyme Q (CoQ) is a component of the mitochondrial electron transport chain and regarded as a strong anti-oxidant agent. In this study, we focused on the mechanistic insights involved in the hepato-protective effects of CoQ against hepatic ischemia reperfusion (IR) injury. Our results revealed that CoQ significantly improved hepatic dysfunctions and oxidative stress caused by IR injury. Interestingly, as compared to IR subjected rat, CoQ inhibited apoptosis by marked down-regulation of both Bax and PUMA genes while the level of Bcl-2 gene was significantly increased. Moreover, CoQ up-regulated PI3K, Akt and mTOR protein expressions while it inhibited the expression of both GSK-3β and β-catenin. Additionally, CoQ restored oxidant/antioxidant balance via marked activated Nrf-2 protein as well as up-regulation of both Sirt-1 and FOXO-3 genes. Moreover, CoQ strongly inhibited inflammatory response through down-regulation of NF-κB-p65 and decrease both JAK1 and STAT-3 protein expressions with a subsequent modulating circulating inflammatory cytokines. Furthermore, histopathological analysis showed that CoQ remarkably ameliorated the histopathological damage induced by IR injury. Taken together, our results suggested and proved that CoQ provided a hepato-protection against hepatic IR injury via inhibition of apoptosis, oxidative stress, inflammation and their closed related pathways.
辅酶 Q(CoQ)是线粒体电子传递链的组成部分,被认为是一种强大的抗氧化剂。在这项研究中,我们专注于 CoQ 对肝缺血再灌注(IR)损伤的肝保护作用所涉及的机制见解。我们的结果表明,CoQ 显著改善了由 IR 损伤引起的肝功能障碍和氧化应激。有趣的是,与 IR 处理的大鼠相比,CoQ 通过显著下调 Bax 和 PUMA 基因来抑制细胞凋亡,而 Bcl-2 基因的水平显著增加。此外,CoQ 上调了 PI3K、Akt 和 mTOR 蛋白的表达,同时抑制了 GSK-3β 和 β-catenin 的表达。此外,CoQ 通过明显激活 Nrf-2 蛋白以及上调 Sirt-1 和 FOXO-3 基因来恢复氧化还原平衡。此外,CoQ 通过下调 NF-κB-p65 和降低 JAK1 和 STAT-3 蛋白的表达以及随后调节循环炎症细胞因子来强烈抑制炎症反应。此外,组织病理学分析表明,CoQ 显著改善了由 IR 损伤引起的组织病理学损伤。总之,我们的研究结果表明并证实,CoQ 通过抑制细胞凋亡、氧化应激、炎症及其相关途径,为肝 IR 损伤提供了肝保护作用。
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