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在古典激活的小鼠巨细胞中细胞内甲基酸的积累是由HIF-1α介导的
Daniel Prantner1, Stefanie N Vogel1
1Department of Microbiology and Immunology, University of Maryland School of Medicine, 685 West Baltimore St., Suite 380, Baltimore, MD 21201, USA.
缺氧诱导因子-1α (HIF-1α) 在败血症期间促进了巨细胞的炎症和甲基氧 (MG) 积累. 准HIF-1α可能会限制MG积累,并提供败血症治疗.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 细胞炎症是一种细胞炎症.
背景情况:
- 败血症涉及巨细胞中显著的代谢和炎症变化.
- 甲基醇 (MG) 是一种反应性代谢物,在巨细胞激活过程中积累.
- 缺氧诱导因子-1α (HIF-1α) 是糖解和炎症的关键调节剂.
研究的目的:
- 研究HIF-1α和糖解在巨细胞炎症和MG积累中的作用.
- 为了确定HIF-1α是否调节炎性基因表达和MG adducts.
- 探索针对败血症中HIF-1α的治疗潜力.
主要方法:
- 与野生类型与HIF1a缺陷巨细胞中的基因表达和MG adducts相关的HIF-1α稳定.
- 使用LPS和IFN-γ刺激,化 (低氧模仿) 和不同度的葡萄糖.
- 评估了甲基醇抗剂 (aminoguanidine) 对细胞因子表达的影响.
主要成果:
- 缺少HIF-1α可减少MG积累和促炎性基因表达 (Tnf,Il1b).
- 增加的葡萄糖水平增强了内源性MG添加物和细胞因子表达.
- 氨基瓜尼丁治疗降低了小鼠和人类巨细胞中的Tnf和Il1b表达.
结论:
- 在经典激活的巨细胞中,HIF-1α稳定是MG积累的上游.
- MG可能调节细胞因子的表达,这表明代谢和炎症之间存在联系.
- 向巨细胞中的HIF-1α活性可能是通过降低MG水平来治疗败血症的治疗策略.
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