Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
Department of Urology, Jinling Hospital, Medical School, Nanjing University, Nanjing, China.
Cell Death Dis. 2021 Jul 3;12(7):672. doi: 10.1038/s41419-021-03958-4.
Over the last decade, more than 10 independent SNPs have been discovered to be associated with the risk of renal cell carcinoma among different populations. However, the biological functions of them remain poorly understood. In this study, we performed eQTL analysis, ChIP-PCR, luciferase reporter assay, and Cox regression analysis to identify the functional role and underlying mechanism of rs67311347 in RCC. The ENCORI database, which contains the lncRNA-miRNA-mRNA interactions, was used to explore the possible target miRNA of ENTPD3-AS1. The results showed that the G > A mutation of rs67311347 created a binding motif of ZNF8 and subsequently upregulated ENTPD3-AS1 expression by acting as an enhancer. The TCGA-KIRC and our cohorts both confirmed the downregulation of ENTPD3-AS1 in RCC tissues and demonstrated that increased ENTPD3-AS1 expression was associated with good OS and PFS. Furthermore, ENTPD3-AS1 interacted with miR-155-5p and activated the expression of HIF-1α, which was an important tumor suppressor gene in the development of RCC. The functional experiments revealed that overexpression of ENTPD3-AS1 inhibited cell proliferation in RCC cell lines and the effect could be rescued by knocking down HIF-1α. Our findings reveal that SNP-mediated lncRNA-ENTPD3-AS1 upregulation suppresses renal cell carcinoma via miR-155/HIF-1α signaling.
在过去的十年中,已经发现了 10 多个独立的单核苷酸多态性(SNP)与不同人群的肾细胞癌风险相关。然而,它们的生物学功能仍知之甚少。在这项研究中,我们进行了 eQTL 分析、ChIP-PCR、荧光素酶报告基因检测和 Cox 回归分析,以确定 rs67311347 在肾细胞癌中的功能作用和潜在机制。ENCORI 数据库包含 lncRNA-miRNA-mRNA 相互作用,用于探索 ENTPD3-AS1 的可能靶 miRNA。结果表明,rs67311347 的 G>A 突变创造了 ZNF8 的结合基序,并通过充当增强子来上调 ENTPD3-AS1 的表达。TCGA-KIRC 和我们的队列都证实了 ENTPD3-AS1 在肾细胞癌组织中的下调,并表明 ENTPD3-AS1 表达的增加与良好的 OS 和 PFS 相关。此外,ENTPD3-AS1 与 miR-155-5p 相互作用并激活 HIF-1α 的表达,HIF-1α 是肾细胞癌发生的重要肿瘤抑制基因。功能实验表明,ENTPD3-AS1 的过表达抑制肾癌细胞系中的细胞增殖,并且通过敲低 HIF-1α可以挽救这种作用。我们的研究结果表明,SNP 介导的 lncRNA-ENTPD3-AS1 上调通过 miR-155/HIF-1α 信号通路抑制肾细胞癌。