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LPS-induced downregulation of microRNA-204/211 upregulates and stabilizes Angiopoietin-1 mRNA in EA.hy926 endothelial cells

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机构: [1]Sun Yat Sen Univ, Canc Ctr, Collaborat Innovat Ctr Canc Med, State Key Lab Oncol South China, Guangzhou 510060, Guangdong, Peoples R China; [2]Sun Yat Sen Univ, Canc Ctr, Dept Pathol, Guangzhou 510060, Guangdong, Peoples R China; [3]Sun Yat Sen Univ, Canc Ctr, Dept Urol, 651 Dongfeng Rd East, Guangzhou 510060, Guangdong, Peoples R China
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关键词: angiopoietin-1 miR-204/211 lipopolysaccharide post-transcriptionally regulate

摘要:
Angiopoietin-1 (ANG-1), a ligand of the endothelial cell-specific TIE2 surface receptor, acts in a complementary and coordinated manner with vascular endothelial growth factor during the process of angiogenesis. ANG-1 can be used as a clinically informative biomarker of disease severity and outcome in severe sepsis. The epithelium-specific Ets transcription factor 1 can activate ANG-1 transcription in the setting of inflammation; however, relatively little is known about the regulation of ANG-1 by microRNAs (miRs). It was observed that lipopolysaccharide (LPS) significantly increased ANG-1 mRNA and protein expression in EA. hy926 cells. ANG-1 was identified as a potential target gene of miR-204 and miR-211. Overexpression of miR-204/211 partially reversed the LPS-induced ANG-1 expression in EA. hy926 cells. Furthermore, overexpression of miR-204/211 significantly reduced the activity of a luciferase reporter gene containing the wild-type ANG-1 3'-untranslated region (UTR), but did not influence the activity of a luciferase reporter gene containing the ANG-1 3'-UTR with a mutated miR-204/211 binding site, confirming that miR-204/211 can bind to the ANG-1 3'-UTR and post-transcriptionally regulate ANG-1. Additionally, LPS enhanced the stability of ANG-1 mRNA by reducing the abundance of miR-204/211. Overexpression of miR-204/211 reduced the migration of EA. hy926 cells in vitro. The present study demonstrated that ANG-1 is a novel direct target gene of miR-204 and miR-211; in addition, LPS was able to inhibit this effect by reducing the expression of miR-204 and miR-211.

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出版当年[2017]版:
大类 | 4 区 医学
小类 | 4 区 医学:研究与实验 4 区 肿瘤学
最新[2023]版:
大类 | 3 区 医学
小类 | 4 区 医学:研究与实验 4 区 肿瘤学
第一作者:
第一作者机构: [1]Sun Yat Sen Univ, Canc Ctr, Collaborat Innovat Ctr Canc Med, State Key Lab Oncol South China, Guangzhou 510060, Guangdong, Peoples R China; [2]Sun Yat Sen Univ, Canc Ctr, Dept Pathol, Guangzhou 510060, Guangdong, Peoples R China;
通讯作者:
通讯机构: [1]Sun Yat Sen Univ, Canc Ctr, Collaborat Innovat Ctr Canc Med, State Key Lab Oncol South China, Guangzhou 510060, Guangdong, Peoples R China; [3]Sun Yat Sen Univ, Canc Ctr, Dept Urol, 651 Dongfeng Rd East, Guangzhou 510060, Guangdong, Peoples R China
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