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Long Noncoding RNA HITTERS Protects Oral Squamous Cell Carcinoma Cells from Endoplasmic Reticulum Stress‐Induced Apoptosis via Promoting MRE11‐RAD50‐NBS1 Complex Formation
Advanced Science ( IF 14.3 ) Pub Date : 2020-10-04 , DOI: 10.1002/advs.202002747
Chenzhou Wu 1 , Wen Chen 1 , Fanyuan Yu 2 , Yihang Yuan 1 , Yafei Chen 1 , Douglas R Hurst 3 , Yi Li 1 , Longjiang Li 1 , Zhe Liu 1
Affiliation  

Recent studies have proven that long noncoding RNAs (lncRNAs) exhibit regulatory functions of both DNA damage response (DDR) and endoplasmic reticulum (ER) stress. Herein, ER stress‐induced lncRNA transcriptomic changes are reported in human oral squamous cell carcinoma (OSCC) cells and a novel lncRNA HITTERS (H ERPUD1 intronic transcript of ER stress) is identified as the most significantly upregulated lncRNA. It is shown that HITTERS is a nucleus‐located lncRNA including two transcript variants. HITTERS lacks an independent promoter but shares the same promoter with HERPUD1. HITTERS is transcriptionally regulated by Activating Transcription Factor (ATF) 6, ATF4, X‐Box Binding Protein 1 (XBP1), and DNA methylation. In human OSCC tissues, HITTERS is significantly correlated with OSCC clinicopathological features and prognosis. Gain‐ and loss‐of‐function studies reveal that HITTERS promotes OSCC proliferation and invasion via influencing the expression of growth factor receptors and the downstream pathways. Once ER stress is triggered, HITTERS significantly attenuates ER stress‐induced apoptosis both in vivo and in vitro. Mechanically, HITTERS functions as RNA scaffold to promote MRE11‐RAD50‐NBS1 complex formation in the repair of ER stress‐induced DNA damage. To sum up, this study presents a novel lncRNA, namely HITTERS, which links ER stress and DDR together in OSCC.

中文翻译:


长非编码 RNA HITTERS 通过促进 MRE11-RAD50-NBS1 复合物形成来保护口腔鳞状细胞癌细胞免受内质网应激诱导的细胞凋亡



最近的研究证明,长非编码RNA(lncRNA)表现出DNA损伤反应(DDR)和内质网(ER)应激的调节功能。在此,在人口腔鳞状细胞癌(OSCC)细胞中报道了内质网应激诱导的lncRNA转录组变化,并且一种新的lncRNA HITTERSER应激转录H ERPUD1 )被确定为最显着上调的lncRNA。结果表明, HITTERS是一种位于核内的 lncRNA,包含两个转录变体。 HITTERS缺乏独立的启动子,但与HERPUD1共享相同的启动子。 HITTERS激活转录因子 (ATF) 6ATF4X-Box 结合蛋白 1 (XBP1)和 DNA 甲基化的转录调节。在人类 OSCC 组织中, HITTERS与 OSCC 的临床病理特征和预后显着相关。功能获得和丧失研究表明, HITTERS通过影响生长因子受体的表达和下游途径来促进 OSCC 增殖和侵袭。一旦触发内质网应激, HITTERS就会在体内和体外显着减弱内质网应激诱导的细胞凋亡。从机械角度来看, HITTERS作为 RNA 支架,促进 MRE11-RAD50-NBS1 复合物形成,修复内质网应激诱导的 DNA 损伤。综上所述,本研究提出了一种新型 lncRNA,即HITTERS ,它将 OSCC 中的 ER 应激和 DDR 联系在一起。
更新日期:2020-11-19
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