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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >An atmospheric-pressure cold plasma leads to apoptosis in Saccharomyces cerevisiae by accumulating intracellular reactive oxygen species and calcium
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An atmospheric-pressure cold plasma leads to apoptosis in Saccharomyces cerevisiae by accumulating intracellular reactive oxygen species and calcium

机译:大气压冷血浆通过积累细胞内活性氧和钙导致酿酒酵母细胞凋亡

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摘要

A non-thermal plasma is known to induce apoptosis of various cells but the mechanism is not yet clear. A eukaryotic model organism Saccharomyces cerevisiaewas used to investigate the cellular and biochemical regulations of cell apoptosis and cell cycle after an atmospheric-pressure cold plasma treatment. More importantly, intracellular calcium (Ca~(2+)) was first involved in monitoring the process of plasma-induced apoptosis in this study. We analysed the cell apoptosis and cell cycle by flow cytometry and observed the changes in intracellular reactive oxygen species (ROS) and Ca~(2+) concentration, cell mitochondrial membrane potential (Δψ_m) as well as nuclear DNA morphology via fluorescence staining assay. All experimental results indicated that plasma-generated ROS leads to the accumulation of intracellular ROS and Ca~(2+) that ultimately contribute to apoptosis associated with cell cycle arrest at G1 phase through depolarization of Δψ_m and fragmenting nuclear DNA. This work provides a novel insight into the physical and biological mechanism of apoptosis induced by a plasma which could benefit for promoting the development of plasmas applied to cancer therapy.
机译:已知非热等离子体诱导各种细胞的凋亡,但是其机制尚不清楚。真核生物模型酿酒酵母用于研究大气压冷等离子体处理后细胞凋亡和细胞周期的细胞和生化调控。更重要的是,在这项研究中,细胞内钙(Ca〜(2+))首先参与监测血浆诱导的细胞凋亡过程。我们通过流式细胞仪分析了细胞凋亡和细胞周期,并通过荧光染色法观察了细胞内活性氧(ROS)和Ca〜(2+)浓度,细胞线粒体膜电位(Δψ_m)以及核DNA形态的变化。所有实验结果表明,血浆产生的ROS导致细胞内ROS和Ca〜(2+)的积累,最终通过与去极化Δψ_m和使核DNA断裂而导致与细胞周期停滞在G1期有关的凋亡。这项工作提供了对血浆诱导的凋亡的物理和生物学机制的新颖见解,这可能有助于促进应用于癌症治疗的血浆的发展。

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