A HIF-1 target, ATIA, protects cells from apoptosis by modulating the mitochondrial thioredoxin, TRX2.

A HIF-1 target, ATIA, protects cells from apoptosis by modulating the mitochondrial thioredoxin, TRX2.
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DOI:
10.1016/j.molcel.2011.03.030
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发表时间:
2011-06-10
期刊:
影响因子:
16
通讯作者:
Liu ZG
Liu ZG
中科院分区:
生物学1区
文献类型:
--
作者:
Choksi S;Lin Y;Pobezinskaya Y;Chen L;Park C;Morgan M;Li T;Jitkaew S;Cao X;Kim YS;Kim HS;Levitt P;Shih G;Birre M;Deng CX;Liu ZG

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细胞凋亡的调节对于控制组织稳态和防止肿瘤形成和生长至关重要。活性氧(ROS)的产生在这种调节中起着关键作用。在这里,我们描述了 HIF-1 靶标 ATIA(抗 TNFα 诱导的细胞凋亡),它可以保护细胞免受 TNFα 和缺氧诱导的细胞凋亡。通过生成 ATIA 敲除小鼠,我们发现 ATIA 通过调节线粒体抗氧化剂、硫氧还蛋白-2 和 ROS 生成的功能来保护细胞免于凋亡。 ATIA 在人胶质母细胞瘤中高表达,胶质母细胞瘤细胞中 ATIA 敲低使它们对缺氧诱导的细胞凋亡敏感。因此,ATIA不仅是调节线粒体氧化还原途径的HIF-1靶点,而且是人类胶质母细胞瘤的潜在诊断标志物和治疗靶点。
The regulation of apoptosis is critical for controlling tissue homeostasis and preventing tumor formation and growth. Reactive Oxygen Species (ROS) generation plays a key role in such regulation. Here, we describe a HIF-1 target, ATIA (anti-TNFα-induced apoptosis), which protects cells against TNFα- and hypoxia-induced apoptosis. Through the generation of ATIA knockout mice, we show that ATIA protects cells from apoptosis through regulating the function of the mitochondrial antioxidant, thioredoxin-2, and ROS generation. ATIA is highly expressed in human glioblastoma and ATIA knockdown in glioblastoma cells renders them sensitive to hypoxia-induced apoptosis. Therefore, ATIA is not only a HIF-1 target that regulates mitochondrial redox pathways but a potentially diagnostic marker and therapeutic target in human glioblastoma.
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