循环单细胞粘附修复内皮脱皮损伤通过下游的激酶3介导内皮化
Zhi-Peng Song1, Lin Chen1, Qian-Wen Wang1
1National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China.
Biochimica et biophysica acta. Molecular basis of disease
|December 17, 2024
概括
血液单细胞通过粘附到受损部位,迅速修复内皮脱皮损伤. 这一过程由单细胞化学吸引蛋白1 (MCP1) 和DOK3信号介导,增强了内皮的完整性和功能.
科学领域:
- 血管生物学 血管生物学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 内皮单层完整性对于预防出血和血栓至关重要.
- 在严重的内皮脱皮损伤后,快速修复的机制尚未完全理解.
- 循环单细胞与内皮细胞具有共同的生物学特性,这表明在伤口愈合中可能发挥作用.
研究的目的:
- 为了研究血液单细胞在内皮层伤口愈合中的作用.
- 为了阐明底层的分子机制单细胞介导内皮细胞修复.
主要方法:
- 在小鼠中建立了一个体内常见动脉内皮脱皮 (CCAED) 模型.
- 使用免疫光和并行板流室评估单细胞粘附.
- 使用了基因酶3缺乏 (DOK3-/-) 和野生型 (WT) 老鼠,以及特定的抑制剂 (INCB3344,Bindarit).
主要成果:
- 与WT小鼠相比,在DOK3-/-小鼠中,单细胞介导内皮质化更有效.
- 单细胞化学吸引蛋白1 (MCP1) 通过DOK3和CC基因受体2B型 (CCR2B) 发出信号,促进单细胞粘附和细胞内Ca2+度.
- 附着单细胞表达了内皮标记物,并恢复了内皮依赖的血管松,在DOK3-/-小鼠中具有增强的效果.
结论:
- 循环单细胞粘附是修复内皮质脱皮损伤的关键机制.
- 在MCP1/DOK3/CCR2B/Ca2+信号通路中介于单细胞的招募和粘附以进行内皮修复.
- 单细胞衍生的内皮质化补偿内皮功能,并防止血栓形成.
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