在巨细胞中,TGF-β解离糖解和炎症,并在败血症期间控制存活率
Thierry Gauthier1, Chen Yao2, Tyrone Dowdy3
1Mucosal Immunology Section, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health, Bethesda, MD 20892, USA.
Science signaling
|August 8, 2023
概括
转化生长因子-β (TGF-β) 通过通过mTOR-c-MYC促进糖解,抑制炎症类细胞因子,改变巨细胞代谢. 这种代谢转变会损害败血症模型中的存活率,并且与严重的COVID-19相关,这表明TGF-β是治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 蜂信号传输是如何进行的
背景情况:
- 巨细胞激活对于免疫反应至关重要,需要代谢适应.
- 转化生长因子-β (TGF-β) 是一种关键的免疫调节细胞因子,在炎症和细胞存活中起着已知的作用.
研究的目的:
- 调查TGF-β在激活期间调节巨细胞代谢中的作用.
- 确定TGF-β介导的巨细胞代谢和炎症变化背后的分子机制.
- 评估TGF-β诱导的代谢变化对败血症结局的影响及其在人类疾病中的相关性.
主要方法:
- 使用了败血症和LPS诱导的内毒性病的小鼠模型.
- 研究了糖解酶的表达和活性,包括肝脏类型的果酸酶-1 (PFKL).
- 分析了涉及mTOR,c-MYC,SMAD3,AP-1,NF-κB和STAT1.1的信号通路.
- 检查了髓状细胞中的基因表达 (PFKL,TGFBRI,F13A1) 与COVID-19患者数据之间的相关性.
主要成果:
- TGF-β上调了PFKL的表达和活性,促进了巨细胞的葡萄糖分解,而不依赖于炎症性细胞因子的产生.
- 糖解酶增强是由一个依赖mTOR-c-MYC的途径介导的.
- 通过SMAD3激活和抑制AP-1,NF-κB和STAT1.1,TGF-β抑制了促炎性细胞因子的产生.
- 在接受TGF-β治疗的小鼠中,巨细胞糖解的增加导致败血症模型的存活率下降,这与血液凝固的增加有关.
- 骨髓细胞中PFKL,TGFBRI和F13A1的表达与患者队列中的COVID-19严重程度正相关.
结论:
- TGF-β通过促进糖解和通过独特的分子通路抑制炎症,对巨细胞代谢进行关键调节.
- 巨细胞中TGF-β诱导的代谢重编程会对败血症存活率产生负面影响,并与严重的COVID-19有关.
- 针对TGF-β介导的巨细胞代谢通路可能为败血症和相关炎症状况提供一种新的治疗策略.
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