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相关概念视频

Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

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Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
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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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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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相关实验视频

Updated: Jun 27, 2025

Evaluating Vascular Hyperpermeability-inducing Agents in the Skin with the Miles Assay
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血管新生和微血管透性

Ye Zeng1, Bingmei M Fu2

  • 1Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China.

Cold Spring Harbor perspectives in medicine
|May 1, 2024
PubMed
概括

血管新生,新血管的形成,对于组织的修复和生长至关重要. 本综述探讨了它在健康和疾病 (包括癌症和纤维化) 中的作用,重点介绍了葡萄糖的作用.

科学领域:

  • 生理学 生理学 生理学
  • 病理学 病理学 病理学
  • 生物医学工程 生物医学工程

背景情况:

  • 血管新生对于组织再生和修复至关重要,涉及微血管密度和透性.
  • 血管内皮生长因子 (VEGF) 是血管生成和微血管透性的关键调节者.
  • 葡萄糖在调节微血管透性和细胞相互作用方面发挥着重要作用.

研究的目的:

  • 审查血管新生在生理和病理过程中的多方面的作用.
  • 阐明血管生成的调节机制,重点关注VEGF和糖核.
  • 突出各种疾病中失调血管生成的病理影响.

主要方法:

  • 关于血管生成中的关键信号因子的文献综述.
  • 分析血管新生在组织生长和伤口愈合中的作用.
  • 在瘤发生和纤维性疾病中检查病态血管生成.

主要成果:

  • VEGF是血管生成和微血管透性的中央调节者.
  • 血管新生对于骨再生和伤口愈合至关重要.
  • 异常血管生成有助于瘤发生,转移和纤维状况.

结论:

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  • 血管新生是一个复杂的过程,在健康和疾病中起着关键作用.
  • 了解VEGF和葡萄糖相互作用是调节血管生成的关键.
  • 针对病理性血管生成为各种疾病提供治疗潜力.