血小板驱动巨细胞的炎症激活 in vitro.
Anna Rizakou1,2, Annabelle Rosa2, Lukas Johannes Weiss2,3
1Rudolf Virchow Center for Integrative and Translational Bioimaging, Julius-Maximilians-Universität Würzburg, Josef Schneider Str. 2, 97080 Würzburg, Germany.
Journal of leukocyte biology
|August 12, 2025
概括
血小板与巨细胞相互作用,促进心脏损伤模型中的炎症反应. 这种血小板-巨细胞相互作用,在很大程度上依赖于接触,影响了缺血性心脏中的巨细胞激活和基因表达.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
背景情况:
- 巨细胞在组织愈合中起着双重作用,调解修复,但也损伤和纤维化.
- 血小板是关键的炎症媒介,与巨细胞相互作用,可能调节它们的表型.
- 血小板对巨细胞基因表达的确切影响,特别是在无菌损伤环境中,仍然不完全理解.
研究的目的:
- 为了研究血小板对巨细胞激活和基因表达的体外影响.
- 在无菌组织损伤模型中探索血小板-巨细胞相互作用,特别是实验性心肌梗塞 (MI).
- 为了确定血小板诱导的巨细胞前炎性偏振的接触依赖性.
主要方法:
- 利用散装RNA测序来分析与激活或静止血小板共培养的小鼠骨髓衍生的巨细胞中的基因表达变化.
- 使用光显微镜可视化实验性心肌梗塞小鼠模型中的直接血小板-巨细胞相互作用.
- 使用过井测试来评估血小板-巨细胞通信的接触依赖性.
主要成果:
- 与激活血小板共同培养诱导了巨细胞中广泛的促炎基因上调,包括炎症基因 (Il1b,Trem1,Tlr2,Cd14),血管生成 (Vegfa) 和缺氧反应 (Hif1a).
- 休息的血小板也引起了炎症基因表达,虽然比激活的血小板少.
- 血小板和血小板衍生的CXCL4对巨细胞中益菌性基因表达的影响很小.
- 血小板对巨细胞转录组的抗炎作用在很大程度上取决于直接的细胞接触.
结论:
- 血小板与缺血性心脏中的巨细胞直接相互作用.
- 血小板,特别是激活的血小板,在体外将巨细胞两极分化为一种促炎性表型.
- 这些发现表明,血小板 - 巨细胞相互作用在驱动心脏巨细胞炎症激活心肌梗塞后的过程中起着重要作用.
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