Liang Li;Jing Tang;Baohua Zhang;Wen Yang;Miyang LiuGao;Ruoyu Wang;冶雄 谈;Jianling Fan;Yanxin Chang;Jing Fu;Feng Jiang;Caiyang Chen;Yingcheng Yang;Jin Gu;Dingming Wu;Linna Guo;Dan Cao;Hengyu Li;广文 曹;孟超 吴;Michael Q. Zhang;Lei Chen;红阳 王
Second Military Medical University;National Center for Liver Cancer;Tsinghua University;Shanghai Jiao Tong University
发表时间:2015-1-1
期 刊:Gut
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=84919733857&partnerID=8YFLogxK
Objective: Liver tumour-initiating cells (T-ICs) are critical for hepatocarcinogenesis. However, the underlying mechanism regulating the function of liver T-ICs remains unclear.
Methods: Tissue microarrays containing 242 hepatocellular carcinoma (HCC) samples were used for prognostic analysis. Magnetically activated cell sorting was used to isolate epithelial cell adhesion molecule (EPCAM)-positive cells. The gene expressions affected by miR-429 were determined by arrays. Co-immunoprecipitation was used to study interactions among retinoblastoma protein (RB1), Rb binding protein 4 (RBBP4) and E2F transcription factor 1 (E2F1). The DNA methylation status in CpG islands was detected by quantitative methylation analysis. miRNAs in microvesicles were isolated by a syringe filter system.
Results: The significant prognosis factor miR-429 was upregulated in HCC tissues and also in primary liver T-ICs isolated from clinical samples. The enrichment of miR-429 in EPCAM+T-ICs contributed to hepatocyte self-renewal, malignant proliferation, chemoresistance and tumorigenicity. A novel functional axis involving miR-429, RBBP4, E2F1 and POU class 5 homeobox 1 (POU5F1 or OCT4) governing the regulation of liver EPCAM+T-ICs was established in vitro and in vivo. The molecular mechanism regulating miR-429 expression, involving four abnormal hypomethylated sites upstream of the miR-200b/miR-200a/miR-429 cluster, was first defined in both EPCAM+ liver T-ICs and very early-stage HCC tissues. miR-429 secreted by high-expressing cells has the potential to become a proactive signalling molecule to mediate intercellular communication.
Conclusions: Epigenetic modification of miR-429 can manipulate liver T-ICs by targeting the RBBP4/E2F1/OCT4 axis. This miRNA might be targeted to inactivate T-ICs, thus providing a novel strategy for HCC prevention and treatment.
Scopus度量
年份 | CiteScore | SJR | SNIP |
---|---|---|---|
1996 | |||
1997 | |||
1998 | |||
1999 | 1.354 | 2.1 | |
2000 | 1.953 | 2.227 | |
2001 | 2.014 | 2.305 | |
2002 | 2.104 | 2.376 | |
2003 | 1.912 | 2.196 | |
2004 | 2.25 | 2.219 | |
2005 | 2.392 | 2.381 | |
2006 | 3.056 | 2.663 | |
2007 | 3.08 | 2.689 | |
2008 | 3.275 | 2.703 | |
2009 | 3.308 | 2.734 | |
2010 | 3.527 | 2.71 | |
2011 | 15.3 | 3.626 | 2.626 |
2012 | 16.8 | 4.066 | 2.75 |
2013 | 19.8 | 5.58 | 3.438 |
2014 | 23.2 | 6.104 | 3.829 |
2015 | 26.1 | 6.809 | 4.053 |
2016 | 27.7 | 7.074 | 4.083 |
2017 | 28.6 | 7.44 | 3.935 |
2018 | 29.1 | 7.085 | 3.997 |
2019 | 32.2 | 7.763 | 4.597 |
2020 | 35.2 | ||
2021 |
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