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The Hippo Pathway Effector TAZ Regulates Ferroptosis in Renal Cell Carcinoma.
Cell Reports ( IF 7.5 ) Pub Date : 2019-09-03 , DOI: 10.1016/j.celrep.2019.07.107
Wen-Hsuan Yang 1 , Chien-Kuang Cornelia Ding 2 , Tianai Sun 2 , Gabrielle Rupprecht 3 , Chao-Chieh Lin 2 , David Hsu 3 , Jen-Tsan Chi 2
Affiliation  

Despite recent advances, the poor outcomes in renal cell carcinoma (RCC) suggest novel therapeutics are needed. Ferroptosis is a form of regulated cell death, which may have therapeutic potential toward RCC; however, much remains unknown about the determinants of ferroptosis susceptibility. We found that ferroptosis susceptibility is highly influenced by cell density and confluency. Because cell density regulates the Hippo-YAP/TAZ pathway, we investigated the roles of the Hippo pathway effectors in ferroptosis. TAZ is abundantly expressed in RCC and undergoes density-dependent nuclear or cytosolic translocation. TAZ removal confers ferroptosis resistance, whereas overexpression of TAZS89A sensitizes cells to ferroptosis. Furthermore, TAZ regulates the expression of Epithelial Membrane Protein 1 (EMP1), which, in turn, induces the expression of nicotinamide adenine dinucleotide phosphate (NADPH) Oxidase 4 (NOX4), a renal-enriched reactive oxygen species (ROS)-generating enzyme essential for ferroptosis. These findings reveal that cell density-regulated ferroptosis is mediated by TAZ through the regulation of EMP1-NOX4, suggesting its therapeutic potential for RCC and other TAZ-activated tumors.

中文翻译:

Hippo 通路效应器 TAZ 调节肾细胞癌中的铁死亡。

尽管最近取得了进展,但肾细胞癌(RCC)的不良预后表明需要新的治疗方法。铁死亡是一种受调节的细胞死亡形式,可能对肾细胞癌具有治疗潜力;然而,关于铁死亡易感性的决定因素仍然有很多未知之处。我们发现铁死亡的易感性很大程度上受细胞密度和汇合度的影响。由于细胞密度调节 Hippo-YAP/TAZ 通路,我们研究了 Hippo 通路效应子在铁死亡中的作用。TAZ 在 RCC 中大量表达,并经历密度依赖性核或胞质易位。TAZ 去除赋予细胞对铁死亡的抵抗力,而 TAZS89A 的过度表达则使细胞对铁死亡敏感。此外,TAZ 调节上皮膜蛋白 1 (EMP1) 的表达,进而诱导烟酰胺腺嘌呤二核苷酸磷酸 (NADPH) 氧化酶 4 (NOX4) 的表达,这是一种肾脏富集的活性氧 (ROS) 生成酶对于铁死亡至关重要。这些发现表明,细胞密度调节的铁死亡是由 TAZ 通过调节 EMP1-NOX4 介导的,表明其对 RCC 和其他 TAZ 激活的肿瘤的治疗潜力。
更新日期:2019-09-03
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