
Mitochondria-derived ROS activate AMP-activated protein kinase (AMPK ...
2018年11月2日 · AMPK responds to the cellular ATP/AMP and ATP/ADP ratios by matching mitochondrial ATP production to demand. Previous reports proposed that AMPK activity also responds to ROS, by ROS acting on redox-sensitive cysteine residues (Cys-299/Cys-304) on the AMPK α subunit.
Mitochondria-derived ROS activate AMP-activated protein kinase (AMPK …
AMPK responds to the cellular ATP/AMP and ATP/ADP ratios by matching mitochondrial ATP production to demand. Previous reports proposed that AMPK activity also responds to ROS, by ROS acting on redox-sensitive cysteine residues (Cys-299/Cys-304) on the AMPK α subunit.
ROS signaling under metabolic stress: cross-talk between AMPK …
2017年4月13日 · Metabolic stress-induced ROS signaling lies in the hub between metabolic reprogramming and redox homeostasis. Here, we highlight the cross-talk between AMPK and AKT and their regulation on ROS production and elimination, which summarizes the mechanism of cancer cell adaptability under ROS stress and suggests potential options for cancer ...
AMPK Maintains Cellular Metabolic Homeostasis through Regulation …
2017年10月3日 · We demonstrate that mitochondrial ROS are a physiological activator of AMPK and that AMPK activation triggers a PGC-1α-dependent antioxidant response that limits mitochondrial ROS production. Cells lacking AMPK activity display increased mitochondrial ROS levels and undergo premature senescence.
将 ROS 水平与自噬联系起来:AMPK 的关键作用,Antioxidants - X …
2023年7月10日 · 在受 ROS 影响的蛋白质中,AMP 激活蛋白激酶 (AMPK) 被认为是细胞内能量状态的主要传感器,也是参与调节关键细胞过程(如自噬和溶酶体功能)的关键枢纽。 由于这些特性,AMPK 最近被证明能够感知与线粒体动力学变化相关的信号,并将其转导至溶酶体,影响自噬通量。 由于 ROS 的产生很大程度上依赖于线粒体活性,因此通过 AMPK 的调节,这些分子可能代表重要的信号传导剂,参与线粒体和溶酶体之间的串扰,从而协调这些细胞器的功能。 在这篇 …
北大肖瑞平团队揭示高糖抑制AMPK信号通路的分子机制 - 知乎
该研究发现,高糖对于AMPK的催化亚基AMPKα的蛋白水平和激酶活性具有双重的抑制作用。 首先,高糖刺激促进了细胞中 活性氧 (ROS)的生成。升高的ROS激活了AKT,使其磷酸化AMPKa的485/491号位的丝氨酸(在AMPKα1中是S485, 在AMPKα2中是S491)位点,而S485/491位点的磷酸化促进了AMPKα招募骨骼肌中高表达的E3泛素化连接酶MG53。 先前的研究表明,MG53在代谢综合征的病人和动物模型中表达水平增高,并参与 胰岛素信号通路 的负 …
Glucose restriction induces ROS-AMPK-mediated CTR1 …
2022年9月1日 · In the current study, we found that high levels of AMPK and CTR1 expression predicted better prognosis in LUAD and that in vitro glucose restriction in NSCLC cells significantly increased CTR1 expression through a ROS-AMPK signaling pathway.
线粒体衍生的 ROS 间接激活 AMP 活化蛋白激酶 (AMPK)。,Journal …
2018年9月19日 · AMPK 通过将线粒体 ATP 生产与需求相匹配来响应细胞 ATP/AMP 和 ATP/ADP 比率。 以前的报告提出 AMPK 活性也对 ROS 有反应,通过 ROS 作用于 AMPK α 亚基上的氧化还原敏感半胱氨酸残基 (Cys-299/Cys-304)。 这表明了一个吸引人的模型,其中线粒体通过腺嘌呤核苷酸依赖性机制和氧化还原信号微调 AMPK 活性。 在这里,我们评估了 ROS 的生理水平是否直接改变 AMPK 活性。 为此,我们将外源性过氧化氢 (H2O2) 添加到细胞中,并利用线粒体靶向 …
Ithasalsobeenproposedthatreactiveoxygenspecies(ROS) can directly regulate AMPK activity independently of changes in adenine nucleotides (12–18). Redox regulation typically occurs by the reversible oxidation of cysteine thiols, thereby altering the activity, cellular localization, or binding interac-tions of a protein (19–22).
ROS signaling under metabolic stress: cross-talk between AMPK …
2017年4月13日 · AMPK mediates metabolic change to resist the ROS accumulation, while AKT renders cells more susceptible to ROS mediated cell death. This review summarizes the cross-talk between these two kinases, mainly through antagonistic regulation on their downstream effectors, mTOR and FOXO.