来自预先怀孕患者的AT1受体激动性抗体刺激NADPH氧化酶
Ralf Dechend1, Christiane Viedt, Dominik N Müller
1HELIOS Klinikum-Berlin, Franz Volhard Clinic and the Max Delbrück Center for Molecular Medicine, Humboldt University of Berlin, Germany.
Circulation
|April 2, 2003
概括
抗胰岛素AT1受体 (AT1-AA) 的抗原性自身抗体增加反应性氧物种 (ROS) 和激活核因子-kappaB (NF-kappaB) 在产前. 这表明AT1-AA通过NADPH氧化酶激活促进炎症.
科学领域:
- 心血管研究研究心血管研究
- 生殖生物学 生殖生物学
- 免疫学 免疫学 免疫学
背景情况:
- 在孕前症中已经确定了对血管素AT1受体 (AT1-AA) 的激动性自身抗体.
- 需要进一步研究AT1-AA在产前病原发生的精确作用.
研究的目的:
- 阐明AT1-AA对反应性氧物种 (ROS) 生产,NADPH氧化酶表达和先兆子中核因子-kappaB (NF-kappaB) 激活的影响.
主要方法:
- 研究了人类血管光滑肌细胞 (VSMC),热囊细胞和胎盘.
- 从孕产前妇女血清中分离出AT1-AA.
- 使用了西式涂抹,NF-kappaB激活试验和遗传淘汰模型 (p47phox-/-小鼠).
主要成果:
- AT1-AA和 ангиотензин II (Ang II) 增加了ROS的产生和NADPH氧化酶组成部分 (p22,p47,p67 phox).
- AT1-AA激活了NF-kappaB,并在VSMC和热囊细胞中降低了抑制剂-kappaBalpha (I-kappaBalpha) 的表达.
- 增加的p22,p47,和p67狐的表达,以及NF-kappaB的激活,观察到胎盘从先孕患者.
结论:
- NADPH氧化酶是ROS的重要来源,在孕前症中对NF-kappaB进行上调.
- 通过NADPH氧化酶激活,AT1-AA可能会通过NADPH氧化酶激活促进ROS产生和预先怀孕的炎症反应.
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