Long non-coding RNA SNHG20 promotes non-small cell lung cancer cell proliferation and migration by epigenetically silencing of P21 expression.

Long non-coding RNA SNHG20 promotes non-small cell lung cancer cell proliferation and migration by epigenetically silencing of P21 expression.
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长链非编码 RNA SNHG20 通过表观遗传沉默 P21 表达来促进非小细胞肺癌细胞增殖和迁移。

DOI:
10.1038/cddis.2017.484
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发表时间:
2017-10-05
影响因子:
9
通讯作者:
Wang Z
Wang Z
中科院分区:
生物学1区
文献类型:
--
作者:
Chen Z;Chen X;Chen P;Yu S;Nie F;Lu B;Zhang T;Zhou Y;Chen Q;Wei C;Wang W;Wang Z

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越来越多的证据表明,长链非编码rna (lncRNAs)是控制多种生物过程的新型转录本,其失调与多种类型癌症的发生和进展有关。小核仁RNA宿主基因20 (SNHG20)是一个2183 bp的lncRNA,其过表达预示着结直肠癌和肝细胞癌的不良预后。然而,SNHG20的临床相关性及其影响癌细胞表型的分子机制尚未见文献报道。本研究发现,与正常样本相比,SNHG20在非小细胞肺癌(NSCLC)组织中表达上调。较高的SNHG20表达与肿瘤、淋巴结和转移(TNM)分期和肿瘤大小以及较差的总生存期显著相关。此外,敲低SNHG20可抑制NSCLC细胞的增殖、迁移并诱导细胞凋亡。机制研究表明,SNHG20可以与EZH2 (zeste homolog 2的增强子)相互作用,从而抑制P21的表达。此外,救援实验表明,SNHG20部分通过抑制非小细胞肺癌细胞中的p21而发挥癌基因的作用。综上所述,我们的研究结果表明SNHG20是用于非小细胞肺癌诊断、预后和治疗的新候选基因。
Mounting evidence demonstrates that long non-coding RNAs (lncRNAs) are novel transcripts governing multiple biological processes, and their dysregulation is involved in the development and progression of multiple types of cancers. Small Nucleolar RNA Host Gene 20 (SNHG20) is a 2183 bp lncRNA, and its overexpression predicts poor prognosis in colorectal cancer and hepatocellular carcinoma. However, the clinical relevance of SNHG20 and its molecular mechanisms affecting cancer cell phenotype have not been documented. Here, we found that SNHG20 was upregulated in non-small cell lung cancer (NSCLC) tissues compared with normal samples. Higher SNHG20 expression was significantly associated with advanced tumor, lymph node and metastases (TNM) stage and tumor size, as well as poorer overall survival. Moreover, knockdown of SNHG20 repressed NSCLC cell proliferation, migration and induced cell apoptosis. Mechanistic investigations revealed that SNHG20 could interact with EZH2 (enhancer of zeste homolog 2), thereby repressing P21 expression. Furthermore, rescue experiments indicated that SNHG20 functioned as an oncogene partly via repressing p21 in NSCLC cells. Taken together, our findings demonstrate that SNHG20 is a new candidate for use in NSCLC diagnosis, prognosis and therapy.
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