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Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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相关实验视频

Updated: May 7, 2026

Murine Spinotrapezius Model to Assess the Impact of Arteriolar Ligation on Microvascular Function and Remodeling
16:43

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CD44调节小鼠的动脉生成,并且在缺乏和良好的附带担保的患者中差异表达.

N van Royen1, M Voskuil, I Hoefer

  • 1Department of Cardiology, Room B2-114, Academic Medical Center, University of Amsterdam, Meibergdreef 9 1105 AZ, Amsterdam, The Netherlands. n.vanroyen@amc.uva.nl

Circulation
|March 17, 2004
PubMed
概括
此摘要是机器生成的。

CD44糖蛋白对于动脉发生,即附带动脉的生长至关重要. 它的缺乏严重损害了这一过程,在担保不良的患者中观察到表达较低.

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Last Updated: May 7, 2026

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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
  • 分子生物学分子生物学

背景情况:

  • 动脉生成,即副动脉的发展,是由提供生长因子的单细胞主导的.
  • CD44糖蛋白涉及白细胞扩散和生长因子信号传递.

研究的目的:

  • 为了研究CD44在动脉形成过程中的作用.

主要方法:

  • 利用小鼠后肢模型研究动脉形成.
  • 评估了CD44表达及其对白细胞贩运和生长因子水平的影响.
  • 分析了冠状动脉疾病患者单细胞中的CD44表达.

主要成果:

  • 在小鼠的附带动脉生长过程中,CD44表达显著增加.
  • 在CD44缺乏的小鼠中,动脉生成严重受损,白细胞招募和生长因子表达 (FGF-2,PDGF-B) 减少.
  • 在人类患者中,单细胞上最大CD44表达的减少与缺陷的附带动脉形成相关.

结论:

  • 这项研究表明CD44在动脉形成中的关键作用.
  • 缺少CD44显著阻碍了附带动脉的发展.
  • 单细胞上较低的CD44表达与冠状动脉疾病患者的担保不良相关.