A Novel TP53 Gene Mutation Sustains Non-Small Cell Lung Cancer through Mitophagy.

A Novel TP53 Gene Mutation Sustains Non-Small Cell Lung Cancer through Mitophagy.
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DOI:
10.3390/cells11223587
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发表时间:
2022-11-13
期刊:
影响因子:
6
通讯作者:
--
中科院分区:
生物学2区
文献类型:
--
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肺癌是世界上癌症死亡的主要原因。特别是,非小细胞肺癌(NSCLC)代表了肺癌人群的大多数。DNA测序技术的进步为揭示基因突变的作用、功能和机制做出了重要贡献。然而,导致癌症及其病理的驱动突变仍有待探索。在这里,我们对314例中国NSCLC患者的肿瘤组织进行了下一代测序(NGS),并建立了NSCLC的突变景观。在656个突变中,我们确定TP 53-p.Glu358Val是肺癌中的驱动突变,并发现它激活线粒体自噬以维持癌细胞生长。为了支持这一发现,皮下植入表达TP 53-p.Glu358Val的NSCLC细胞的小鼠与野生型细胞相比产生了更大的肿瘤。自噬/线粒体自噬的药物抑制选择性地抑制了TP 53-缺失或TP 53-p. Glu 358 Val表达肺癌细胞的细胞增殖。总之,我们的研究描述了从中国肺癌患者中鉴定的一种新的TP 53突变,并揭示了其在调节线粒体自噬中的作用,为NSCLC治疗提供了新的见解。
Lung cancer is the leading cause of cancer death in the world. In particular, non-small-cell lung cancer (NSCLC) represents the majority of the lung cancer population. Advances in DNA sequencing technologies have significantly contributed to revealing the roles, functions and mechanisms of gene mutations. However, the driver mutations that cause cancers and their pathologies remain to be explored. Here, we performed next-generation sequencing (NGS) on tumor tissues isolated from 314 Chinese NSCLC patients and established the mutational landscape in NSCLC. Among 656 mutations, we identified TP53-p.Glu358Val as a driver mutation in lung cancer and found that it activates mitophagy to sustain cancer cell growth. In support of this finding, mice subcutaneously implanted with NSCLC cells expressing TP53-p.Glu358Val developed larger tumors compared to wild-type cells. The pharmaceutical inhibition of autophagy/mitophagy selectively suppresses the cell proliferation of TP53-null or TP53-p.Glu358Val-expressing lung cancer cells. Together, our study characterizes a new TP53 mutation identified from Chinese lung cancer patients and uncovers its roles in regulating mitophagy, providing a new insight into NSCLC treatment.
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