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The anti-oxidant and pro-oxidant dichotomy of Bcl-2

机译:Bcl-2的抗氧化剂和促氧化剂二分法

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摘要

Across a wide spectrum of cellular redox status, there emerges a dichotomy of responses in terms of cell survival/proliferation and cell death. Of note, there is emerging evidence that the anti-apoptotic protein, Bcl-2, in addition to its conventional activity of titrating the pro-apoptotic effects of proteins such as Bax and Bak at the mitochondria, also impacts cell fate decisions via modulating cellular redox metabolism. In this regard, both pro- and anti-oxidant effects of Bcl-2 overexpression have been described under different conditions and cellular contexts. In this short review, we attempt to analyze existing observations and present a probable explanation for the seemingly conflicting redox regulating activity of Bcl-2 from the standpoint of its pro-survival function. The consequential effect(s) of the dual redox functions of Bcl-2 are also discussed, particularly from the viewpoint of developing novel therapeutic strategies against cancers rendered refractory due to the aberrant expression of Bcl-2.
机译:在广泛的细胞氧化还原状态中,在细胞存活/增殖和细胞死亡方面出现了两分反应。值得注意的是,新兴证据表明,抗凋亡蛋白Bcl-2除了具有传统的滴定线粒体Bax和Bak等蛋白促凋亡作用的常规活性外,还通过调节细胞凋亡来影响细胞命运的决定。氧化还原代谢。在这方面,已经在不同条件和细胞环境下描述了Bcl-2过表达的前氧化作用和抗氧化作用。在这篇简短的综述中,我们试图分析现有的观察结果,并从其生存功能的角度对Bcl-2似乎相互矛盾的氧化还原调节活性提出可能的解释。还讨论了Bcl-2双重氧化还原功能的相应作用,特别是从开发针对因Bcl-2异常表达而导致难治性癌症的新型治疗策略的角度出发。

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