在低氧下促进血管生成时,miR-574-3p和HIF-1α之间存在正反循环
Renwen Zhang1, Zeyu Miao1, Yan Liu1
1Department of Pathogenobiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
Microvascular research
|July 22, 2023
概括
微RNA-574-3p通过调节HIF-1α和VEGF的升高来促进胃癌中的血管生成. 在低氧条件下,miR-574-3p和HIF-1α之间的正反循环驱动了这个过程.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 细胞生物学 细胞生物学
背景情况:
- 胃癌 (GC) 是一个重要的全球健康问题.
- 之前的研究表明,miR-574-3p在GC中降低了cullin 2 (CUL2) 的作用.
- 在GC内血管生成中miR-574-3p的作用需要进一步阐明.
研究的目的:
- 确认miR-574-3p和CUL2 3'UTR之间的直接相互作用.
- 研究涉及miR-574-3p,HIF-1α和VEGF在血管生成中的新途径.
- 在低氧条件下阐明miR-574-3p和HIF-1α之间的反循环.
主要方法:
- 在体外实验证实了miR-574-3p和CUL2 3'UTR相互作用.
- 在GC细胞中对miR-574-3p的过度表达研究.
- 在体内小鼠模型中评估血管生成和内皮细胞招募.
- 在细胞系和动物模型中分析miR-574-3p和HIF-1α水平.
- 路西法酶记者测定证实HIF-1α与miR-574促进体结合.
主要成果:
- miR-574-3p直接准了CUL2 3'UTR,抑制了CUL2的表达.
- 在GC细胞中,miR-574-3p的过度表达可提高HIF-1α和VEGF的调节.
- miR-574-3p增强了GC细胞的增殖,迁移,入侵和HUVEC管的形成.
- miR-574-3p在体内促进内皮细胞的招募.
- 一个积极的反循环存在于HIF-1α通过促进体结合上调 miR-574-3p.
结论:
- miR-574-3p在促进胃癌的血管生成中起着至关重要的作用.
- miR-574-3p/HIF-1α/VEGF轴是GC血管生成中的一个关键途径.
- 在miR-574-3p和HIF-1α之间的正反循环在缺氧下增强了血管生成.
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