孔形成结构的内皮细胞激活:互白素-1αα的关键作用
S Saadi1, R A Holzknecht, C P Patte
1Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA. saadi.soheyla@mayo.edu
Circulation
|April 19, 2000
概括
补充体的膜攻击复合体 (MAC) 通过IL-1alpha激活内皮细胞 (ECs),引发炎症. 这种机制与其他形成孔隙的分子共享,突出显示了细胞激活的共同途径.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 血管生物学 血管生物学
背景情况:
- 补充与内皮细胞 (ECs) 的相互作用驱动炎症和凝血.
- 在EC上,膜攻击复合体 (MAC) 通过IL-1alpha. upregulates组织因子和环氧化酶-2通过IL-1alpha.
- 这项研究调查了MAC是否通过这种机制在全球范围内激活EC,以及其他孔形成结构是否利用它.
研究的目的:
- 为了确定MAC是否在全球范围内激活猪大动脉和微血管EC.
- 确定MAC诱导的EC激活机制是否与其他孔形成结构共享.
- 阐明IL-1alpha在补充介导的EC激活中的作用.
主要方法:
- 这些EC被暴露在补充剂中,并且在6个小时内分析了基因表达 (E-selectin,ICAM-1,VCAM-1,Ikappa-Balpha,IL-1alpha,IL-1beta,IL-8,PAI-1).
- 使用IL-1受体对抗剂来评估基因表达是否是主要反应.
- 用抗IL-1alpha抗体来研究IL-1alpha的自身分泌作用.
- 用孔形成 (梅利丁,马斯托巴兰) 来研究它们对E-选择素诱导的影响.
主要成果:
- 补充剂诱导了EC中多个炎症和凝血相关基因的上调.
- 基因表达不是主要反应,因为IL-1受体对抗剂部分抑制了它.
- 补充介导的EC激活依赖于自身隐性IL-1alpha,由抗IL-1alpha抗体抑制.
- 形成毛孔的酸梅利丁和马斯托巴兰通过IL-1诱导了E-选择蛋白.
结论:
- 跨膜孔形成蛋白通过自身隐性IL-1α信号传递激活ECs.
- 这一途径是通过各种孔形成分子进行EC激活的常见机制.
- 研究结果表明,在血管炎症中,补充剂和其他毛孔形成的统一机制.
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