TRIM2 选择性调节炎症驱动的病变性血管新生,而不会影响生理性缺氧媒介血管新生
Nathan K P Wong1,2,3, Emma L Solly1,4, Richard Le1,5
1Vascular Research Centre, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5000, Australia.
International journal of molecular sciences
|March 28, 2024
概括
三方基因含有蛋白2 (TRIM2) 通过影响巨细胞透和新血管生长,在炎症诱导的血管生成中发挥作用. 然而,TRIM2似乎不会在体内影响缺氧驱动的血管生成.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 血管生成的分子机制
背景情况:
- 血管新生对于缺血至关重要,但当由炎症驱动时,可能是病理性的.
- 之前已经发现三方基因含有蛋白2 (TRIM2) 在体外会损害内皮血管的血管功能.
- 在血管生成中TRIM2的体内作用和分子机制需要进一步研究.
研究的目的:
- 研究TRIM2在炎症和缺氧诱导的血管生成中的体内作用.
- 阐明TRIM2在血管生成中的功能背后的分子机制.
- 为了比较TRIM2在不同血管生成环境中的效果.
主要方法:
- 通过CRISPR/Cas9基因编辑生成Trim2淘汰赛小鼠.
- 炎症诱导血管生成的周动脉模型.
- 下肢缺血模型用于缺氧介导的血管生成.
- 在体外内皮细胞培养中,通过shRNA通过TRIM2敲除.
- 对巨细胞透,新血管增殖和分子媒介体 (HIF-1α, eNOS) 的分析.
主要成果:
- 在Trim2淘汰赛小鼠中,炎症模型中的巨细胞透和新血管化减少.
- 在体外,TRIM2 Knockdown 减弱了炎症诱导的血管性介质,如 HIF-1α 和 eNOS 酸化.
- 在Trim2淘汰赛和野生型小鼠之间的后肢缺血模型中,没有观察到血液流转流的显著差异.
- 在试验室中,TRIM2 Knockdown降低了缺氧诱导的HIF-1α,但没有影响其他血管性蛋白质.
结论:
- TRIM2与调节炎症诱导的血管生成有关,特别是关于巨细胞的招募和新血管的形成.
- 在血管生成中TRIM2的作用似乎取决于情境,对缺氧驱动的新血管化的影响有限.
- 这些发现有助于理解TRIM2在各种血管生成过程中的复杂作用.
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