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血小板RANTES引发单细胞招募的沉积需要P-选择素,并参与动脉损伤后的新密度形成.

Andreas Schober1, David Manka, Philipp von Hundelshausen

  • 1Department of Molecular Cardiovascular Research and Cardiology, Rheinisch-Westfälische Technische Hochschule Aachen, Germany.

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血小板P-selectin促进RANTES化学沉积,有助于在血管损伤中招募单细胞. 阻断RANTES受体减少了neointima的形成,为动脉样硬化和静脉缩提供了潜在的治疗点.

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科学领域:

  • 心血管生物学 心血管生物学
  • 免疫学 免疫学 免疫学
  • 血管炎症 血管炎症

背景情况:

  • 动脉样硬化内皮和血小板上的化学激素在动脉发生和复原过程中招募单细胞.
  • 已知P-selectin在这些过程中的作用,但其对血小板化学激素输送的要求尚不清楚.

研究的目的:

  • 为了调查血小板P-选择素是否调解化学激素的输送和单细胞的停止.
  • 为了确定血小板P-选择素在线索诱导的内增生症中的作用.

主要方法:

  • 免疫光和层状流量试验用于研究RANTES沉积和单细胞逮捕.
  • 使用了P-选择素抗体和缺乏P-选择素的小鼠.
  • 电线受伤的阿波利波蛋白E缺陷小鼠中的免疫组织化学和组织形态测量.

主要成果:

  • 血小板P-选择蛋白,而不是内皮P-选择蛋白,增强了RANTES沉积和单细胞停止.
  • 在apoE缺乏的小鼠中,RANTES在neointimal病变中被检测到,但在缺乏血小板P-selectin的小鼠中没有被检测到.
  • Met-RANTES治疗显著减少了新极端斑块区域和巨细胞透.

结论:

  • 血小板P-selectin促进RANTES沉积和单细胞停滞,导致内脏增生.
  • 阻断RANTES受体减弱了neointima的形成和巨细胞的透.
  • 这种途径对于新极端生长至关重要,并建议使用化学因受体对手作为治疗策略.