LncRNA CRNDE Promotes ATG4B-Mediated Autophagy and Alleviates the Sensitivity of Sorafenib in Hepatocellular Carcinoma Cells.

LncRNA CRNDE Promotes ATG4B-Mediated Autophagy and Alleviates the Sensitivity of Sorafenib in Hepatocellular Carcinoma Cells.
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LncRNA CRNDE 促进 ATG4B 介导的自噬并减轻肝细胞癌细胞中索拉非尼的敏感性

DOI:
10.3389/fcell.2021.687524
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发表时间:
2021
影响因子:
5.5
通讯作者:
He F
He F
中科院分区:
生物学2区
文献类型:
--
作者:
Chen L;Sun L;Dai X;Li T;Yan X;Zhang Y;Xiao H;Shen X;Huang G;Xiang W;Zhang Y;Tan D;Yang S;Nie Y;Huang X;Lian J;He F

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自噬与肿瘤细胞的生长和耐药性密切相关,而自噬相关蛋白4 B(ATG 4 B)在自噬过程中起着至关重要的作用。长链非编码RNA(lncRNA)结肠直肠肿瘤差异表达(CRNDE)促进肝细胞癌(HCC)的进展,但CRNDE促癌作用是否与ATG 4 B和自噬调控有关尚不清楚。在此,我们首次证明CRNDE通过上调HCC细胞中的ATG 4 B触发自噬。从机制上讲,CRNDE通过螯合miR-543增强了ATG 4 B mRNA的稳定性,导致HCC细胞中ATG 4 B和自噬的升高。此外,索拉非尼诱导CRNDE和ATG 4 B以及自噬在HCC细胞中。CRNDE的敲低在体外和体内使HCC细胞对索拉非尼敏感。总的来说,这些结果表明,CRNDE驱动ATG 4 B介导的自噬,这减弱了索拉非尼在HCC细胞中的敏感性,这表明CRNDE/ATG 4 B/自噬途径可能是开发索拉非尼在HCC治疗中的增敏措施的新靶点。
Autophagy is closely related to the growth and drug resistance of cancer cells, and autophagy related 4B (ATG4B) performs a crucial role in the process of autophagy. The long non-coding RNA (lncRNA) colorectal neoplasia differentially expressed (CRNDE) promotes the progression of hepatocellular carcinoma (HCC), but it is unclear whether the tumor-promoting effect of CRNDE is associated with the regulation of ATG4B and autophagy. Herein, we for the first time demonstrated that CRNDE triggered autophagy via upregulating ATG4B in HCC cells. Mechanistically, CRNDE enhanced the stability of ATG4B mRNA by sequestrating miR-543, leading to the elevation of ATG4B and autophagy in HCC cells. Moreover, sorafenib induced CRNDE and ATG4B as well as autophagy in HCC cells. Knockdown of CRNDE sensitized HCC cells to sorafenib in vitro and in vivo. Collectively, these results reveal that CRNDE drives ATG4B-mediated autophagy, which attenuates the sensitivity of sorafenib in HCC cells, suggesting that the pathway CRNDE/ATG4B/autophagy may be a novel target to develop sensitizing measures of sorafenib in HCC treatment.
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