TGFβ巨细胞重编程:巨细胞可塑性的新维度
Mary A Oliver1, Xenia D Davis2, Julia K Bohannon1,2
1Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, 1161 21st Avenue South, Nashville, TN, 37232.
Journal of leukocyte biology
|January 10, 2024
概括
转化生长因子β (TGF-β) 改变了巨细胞的新陈代谢,将葡萄糖分解与炎症分离,并促进了凝血. 这挑战了M1/M2分类,并建议TGF-β作为败血症和COVID-19的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 细胞生物学 细胞生物学
背景情况:
- 传统的M1/M2巨细胞分类可能过于简化了复杂的体内功能.
- 转化生长因子β (TGF-β) 通常被视为抗炎药物,但其对巨细胞的代谢作用尚未完全理解.
- 失调的凝血是严重败血症和COVID-19的标志.
研究的目的:
- 研究TGF-β对巨细胞代谢和功能的影响,挑战M1/M2模式.
- 确定TGF-β影响巨细胞表型的分子机制.
- 探索TGF-β介导免疫代谢在败血症和COVID-19中的作用.
主要方法:
- 用TGF-β培养和刺激巨细胞.
- 分析糖溶性酶表达和活性,包括果酸酶,肝脏类型 (PFKL).
- 评估细胞因子的产生,凝血因子的表达和表观遗传修饰 (例如,Smad3激活).
- 在体内研究中,使用过血症的小鼠模型.
- 来自COVID-19患者的基因表达数据的生物信息分析.
主要成果:
- 经TGF-β处理的巨体呈现出增加的葡萄糖分解,抑制的促炎细胞因子,以及增强的凝血因子表达 (F13A1).
- mTOR-c-MYC通路在TGF-β的影响下调节PFKL活动.
- 表观遗传变化,包括Smad3激活,有助于TGF-β诱导的表型.
- 在体内,TGF-β加剧了凝血,并降低了败血症模型中的存活率.
- 经TGF-β处理的巨细胞的代谢概况与SARS-CoV-2 E蛋白暴露细胞相似,在TGFβR1,PFKL和F13A1表达和COVID-19严重程度之间发现了相关性.
结论:
- TGF-β显著改变了巨细胞的免疫代谢,将葡萄糖分解与炎症分离,并促进了前凝血状态.
- 这项研究挑战了简单的M1/M2巨细胞分类,突出了TGF-β复杂的调节作用.
- TGF-β成为败血症和COVID-19的潜在治疗标,特别是在管理失调的凝血方面.
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