ERas Enhances Resistance to Cisplatin-Induced Apoptosis by Suppressing Autophagy in Gastric Cancer Cell

ERas Enhances Resistance to Cisplatin-Induced Apoptosis by Suppressing Autophagy in Gastric Cancer Cell
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ERas 通过抑制胃癌细胞的自噬增强对顺铂诱导的细胞凋亡的抵抗力

DOI:
10.3389/fcell.2019.00375
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发表时间:
2020-01
影响因子:
5.5
通讯作者:
Zhou Qinghua
Zhou Qinghua
中科院分区:
生物学2区
文献类型:
--
作者:
Tian Huajian;Wang Wenjun;Meng Xiao;Wang Miaomiao;Tan Junyang;Jia Wenjuan;Li Peining;Li Jianshuang;Zhou Qinghua

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胃癌(GC)是一种常见的恶性肿瘤,仍然是全球第五大最常见的癌症诊断和第三大癌症相关死亡原因。尽管GC的治疗取得了进展,但预后仍然很差。胚胎干细胞表达的RAS(ERAS)是RAS蛋白家族中的一个新成员,最近被确定为参与胚胎干细胞肿瘤生长的癌基因。最近的一项研究报道,ERAS在大多数GC细胞系和GC标本中都有表达,它通过诱导上皮间充质转化(EMT)和激活PI3K/AKT通路促进GC的致瘤性。在这里,我们发现ERAS阻断了BGC-823和AGS GC细胞的自噬通量,这可能是通过激活AKT/mTOR信号通路而发生的。此外,ERAS过表达抑制了顺铂诱导的细胞凋亡,雷帕霉素处理显著减弱了ERAS介导的顺铂耐药。这些数据表明ERAS可能是一个潜在的治疗靶点,通过调节自噬过程来改善GC患者的预后。
Gastric cancer (GC), a common type of malignant cancer, remains the fifth most frequently diagnosed cancer and the third leading cause of cancer-related deaths worldwide. Despite developments in the treatment of GC, the prognosis remains poor. Embryonic stem cell-expressed Ras (ERas), a novel member of the Ras protein family, has recently been identified as an oncogene involved in the tumorigenic growth of embryonic stem cells. A recent study reported that ERas is expressed in most GC cell lines and GC specimens, and it promotes tumorigenicity in GC through induction of the epithelial mesenchymal transition (EMT) and activation of the PI3K/AKT pathway. Here, we found that ERas blocked autophagy flux in BGC-823 and AGS GC cells, which may occur through activation of the AKT/mTOR signaling pathway. Moreover, ERas overexpression suppressed cisplatin-induced apoptosis, and rapamycin treatment significantly attenuated ERas-mediated cisplatin resistance in GC cells. These data suggest that ERas may be a potential therapeutic target to improve the outcomes of GC patients by regulating the autophagy process.
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