相关实验视频
Updated: May 5, 2026
07:34
Preclinical Model of Hind Limb Ischemia in Diabetic Rabbits
Published on: June 2, 2019
9.4K
通过下肢缺血症的重血管化逆转血管生长因子上调的逆转
Paolo Porcu1, Costanza Emanueli, Maria Kapatsoris
1Institute of Internal Medicine, Medical University of Sassari, Sassari, Italy.
Circulation
|January 5, 2002
概括
在慢性外周血管疾病中,组织kallikrein (tK) 被上调,可能有助于血液流动. 血管内皮生长因子 (VEGF) 水平保持不变. 在重血管化手术后,tK水平正常化.
科学领域:
- 血管生物学 血管生物学
- 血管新生研究研究
- 生物标志物发现发现
背景情况:
- 组织卡利克莱因 (tK) 和血管内皮生长因子 (VEGF) 是已知的血管生成剂.
- 在急性缺血动物模型中观察到tK或VEGF的升调.
- 这些线粒原体在慢性外周血管功能不全中所起的作用尚不清楚.
研究的目的:
- 在患有症状的外周血管疾病的患者中研究循环tK和VEGF的表达.
- 为了确定tK和VEGF水平在手术重血管化前后是否发生变化.
- 探索tK水平与附带船舶形成之间的相关性.
主要方法:
- 在外科手术前后对36名患有外周血管疾病的患者进行循环tK和VEGF测量.
- 在6名患者的运动压力测试中测试的tK.
- 从缺血性四肢分析了tK水平的静脉排泄物,并与血管学数据相关联.
主要成果:
- VEGF水平处于正常范围内,在再血管化后没有变化.
- 与对照组相比,36名患者中34名患者的tK上调 (P<0.05).
- tK水平与附带血管数 (P<0.001) 和恢复血管后正常化 (P<0.01) 呈正相关性.
结论:
- tK诱导可能是慢性动脉衰竭的补偿机制,促进组织输液.
- 像tK和VEGF这样的生长因子的差异表达对治疗性血管生成有影响.
- tK 作为外周血管功能不充分和治疗反应的潜在生物标志物.
相关概念视频
01:10Mechanism of Angiogenesis
6.4K
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...
6.4K
01:24Regulation of Angiogenesis and Blood Supply
2.9K
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...
2.9K
01:23Peripheral Artery Disease V: Postoperative Nursing Management
630
During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
630