Cell Death Dis︱刘朋飞团队合作发现COX7A1通过调节线粒体代谢增强人NSCLC细胞对胱氨酸缺失诱导的铁死亡敏感性
撰文︱徐嘉怡
责编︱王思珍,方以一
编辑︱杨彬薇
(图源:Feng YT, et al., Cell Death Dis, 2022)
综上所述,该研究发现COX7A1通过促进TCA循环和线粒体ETC中复合体IV的活性,增加了NSCLC细胞对CC缺失所致铁死亡的敏感性(图6)。此外,COX7A1通过阻断自噬流抑制线粒体动力学、线粒体合成和自噬。Rap是一种功能性自噬激活剂,在多种细胞系中均有发现。然而,与自噬相关的详细机制和准确的下游靶点尚不清楚。本研究表明了Rap的一种新功能,增强了NSCLC细胞对半胱氨酸缺失诱导铁死亡的敏感性。近年来,许多科学家逐渐揭示了线粒体裂变与融合、线粒体生物发生与线粒体自噬之间的复杂关系,但究竟哪一种机制在COX7A1调控线粒体活性和铁死亡方面发挥着重要作用,还有待进一步研究。
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