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相关概念视频

Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

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 hydroxylase and factor...
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Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.

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相关实验视频

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Vascular Balloon Injury and Intraluminal Administration in Rat Carotid Artery
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在猪冠状动脉气球血管成形后,Ras farnesyltransferase抑制剂的短期局部递送可以在体内防止neointima的形成.

L M Work1, A R McPhaden, N J Pyne

  • 1Department of Physiology and Pharmacology, University of Strathclyde, Glasgow, Scotland, UK.

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|September 26, 2001
PubMed
概括
此摘要是机器生成的。

法尔尼西尔蛋白转移酶抑制剂III (FPTIII) 阻断了p21(ras) 途径,防止气球血管造形术后的复原. 在猪中局部输送的FPTIII抑制了neointima的形成,而不会影响冠状动脉功能.

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科学领域:

  • 心血管研究研究心血管研究
  • 分子生物学分子生物学
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 冠状动脉气球损伤部位的线粒体刺激通过p21(ras) 信号传递促进缩.
  • p21(ras) 是缓解性病变发生的关键媒介.
  • 准p21(ras) 处理是一种潜在的治疗策略,可以预防复.

研究的目的:

  • 为了生化证实farnesyl蛋白转移酶抑制剂III (FPTIII) 抑制了p21 (ras) 处理.
  • 在猪模型中评估局部FPTIII输送在预防冠状动脉气球损伤后新心脏形成的体内疗效.

主要方法:

  • 生物化学测试用于测量光滑肌肉细胞膜中的p21 (ras) 水平.
  • 评估p42/p44 MAPK激活和DNA合成对生长因子的反应.
  • 在体内局部给药FPTIII到气球受伤的猪冠状动脉.
  • 在4周内对neointima形成,蛋白质糖沉积和随机缩的组织学分析.
  • 冠状动脉收缩和内皮依赖放松的功能评估.

主要成果:

  • FPTIII显示了p21 (ras) 水平的度依赖的降低.
  • FPTIII抑制了血小板衍生生长因子诱导的p42/p44 MAPK激活和DNA合成.
  • 当地FPTIII应用防止了neointima的形成,减少了蛋白质糖体沉积,并抑制了冒险性缩.
  • 冠状动脉功能,包括收缩和放松,没有受到FPTIII治疗的影响.

结论:

  • 短期局部输送的FPTIII有效地抑制了p21{ras}-依赖的途径.
  • 这种方法在猪模型中成功地防止了气球血管造形术后的复缩.
  • 在不损害血管功能的情况下,FPTIII代表了一种有前途的治疗药物,用于管理血管形成术后的复原.