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相关概念视频

Regulation of Angiogenesis and Blood Supply01:24

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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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Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
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相关实验视频

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Embryonic Stem Cell-Derived Endothelial Cells for Treatment of Hindlimb Ischemia
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由HUVECs衍生出来的外体会增加新血管化并减少后肢缺血中的四肢缩.

Muhamad T Ismail1, Dyah W Anggrahini1, Sofia M Haryana2

  • 1Department of Cardiology and Vascular Medicine, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia.

Narra J
|January 16, 2025
PubMed
概括
此摘要是机器生成的。

在后肢缺血模型中,人静脉内皮细胞 (HUVECs) 衍生的外体显著减少截肢和亡. 这些外体促进新血管化,为外周动脉疾病提供了有前途的治疗策略.

关键词:
异构体是什么? 异构体是什么? 外构体是什么?截肢是一种截肢.慢性四肢威胁性缺血症是什么后肢缺血 后肢缺血新血管化的新血管化.

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科学领域:

  • 再生医学是一种再生医学.
  • 血管生物学 血管生物学
  • 生物技术是生物技术.

背景情况:

  • 慢性肢体威胁性缺血症 (CLTI) 是一种严重的外周动脉疾病 (PAD),死亡率和截肢率高.
  • 目前的重血管化治疗对于许多CLTI患者来说是不够的,需要新的治疗方法.
  • 来自人类静脉内皮细胞 (HUVEC) 的外体正在研究其治疗潜力.

研究的目的:

  • 在小鼠后肢缺血模型中研究HUVECs衍生的外体在促进新血管化和减少亡方面的疗效.
  • 阐明外体介导治疗效果的潜在生物机制.

主要方法:

  • 在BALB/c小鼠中使用仅测试后的对照组设计进行的一项体内实验研究,后肢单侧双结.
  • 组包括HUVECs衍生的外体,条件介质,酸盐缓冲盐水 (PBS) 和假操作的对照.
  • 毛细血管密度的评估,动脉的亮度直径,临床和遗传病学的亡,microRNA概况,在分析,和VEGF mRNA表达.

主要成果:

  • 外体组没有截肢,而PBS组的截肢率为43%.
  • 显著增加的毛细血管密度和动脉的光线直径在外体组与PBS和假组相比观察到.
  • 与PBS组相比,外体组的临床和组织病理性亡得分有所降低.

结论:

  • 在后肢缺血模型中,HUVECs衍生出的外体有效地改善了新血管化,并减少了缩.
  • 潜在的机制包括能量调节,PI3K/AKT和TGF-β激活,全方位蛋白酶系统和氨酸激酶受体.
  • 外体构成一个有前途的无细胞治疗策略,用于管理CLTI和PAD.