腹腔大动脉动脉瘤患者的血红分化巨细胞中CD163-HO-1通路的功能和调节
Bianca Hamann1, Sönke Weinert2, Jenniffer Mittag1
1Division of Vascular and Endovascular Surgery, Department of Visceral, Thoracic and Vascular Surgery, University Hospital and Faculty of Medicine Carl Gustav Carus, TUD Dresden University of Technology, Germany.
Free radical biology & medicine
|January 6, 2026
概括
腹腔大动脉动脉瘤 (AAA) 中的血红蛋白刺激的巨细胞可能会提供保护. 这些细胞表现出CD163和血红素氧酶-1 (HO-1) 的复杂调节,截断的HO-1形式可能发挥新的调节作用.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 巨细胞生物学 巨细胞生物学
背景情况:
- 腹腔大动脉瘤 (AAA) 涉及新血管泄漏,导致红细胞扩散和血红素释放.
- 血红素分解产物可以导致氧化应激,而巨细胞 (通过CD163和血红素氧酶-1 (HO-1)) 解毒血红素.
- 黑在AAA晚期巨细胞中的作用尚不清楚.
研究的目的:
- 在晚期AAA中研究血红蛋白衍生的血红蛋白在巨上的功能和调节.
- 阐明AAA巨细胞中CD163,HO-1和血红蛋白之间的相互作用.
- 确定血膜刺激对巨细胞炎症反应的影响.
主要方法:
- 在AAA组织中分析CD163和红细胞含量.
- 在体外分化巨细胞从AAA患者与hemin.
- 评估HO-1和CD163表达 (mRNA和蛋白质) 和氧化应激标志物.
- 药理上抑制HO-1 (ZnPP) 和CRISPR-Cas9的淘汰作用.
- 对细胞因子释放的测量 (IL-10,TNF-α,IL-6).
主要成果:
- CD163阳性细胞与AAA组织中的红细胞丰度相反相关.
- 血红分化的AAA巨体显示HO-1和CD163mRNA增加,但CD163蛋白减少,没有氧化应激.
- HO-1 抑制 (ZnPP) 增加了GSH/GSSG比率,HO-1 蛋白,并降低了CD163 蛋白.
- HO-1淘汰赛取消了HO-1蛋白质,但没有取消CD163蛋白质.
- 在ZnPP治疗后出现了一个截断的HO-1形式 (t-HO-1),调节CD163和NQO1mRNA.
结论:
- 血红蛋白分化的巨细胞可能在晚期AAA中起着保护作用.
- 对于降低CD163,HO-1似乎是必要的,而t-HO-1可能会在HO-1抑制期间调节CD163反应.
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