相关实验视频
Updated: Aug 12, 2026
05:53
Use of a Hanging-weight System for Liver Ischemia in Mice
Published on: August 7, 2012
15.9K
肝脏调节导致在体外低氧环境下更好的肺内皮细胞保存
Kentaro Noda1, Neha Atale1, Taylor Austin2
1Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center Health System, Pittsburgh, PA, USA.
The International journal of artificial organs
|January 31, 2025
概括
活体肺 perfusion (EVLP) 的肝脏条件 perfusate 保护肺内皮细胞免受缺氧损伤. 这种方法通过在延长EVLP时间内支持代谢活动来增强肺移植的保存.
科学领域:
- 移植免疫学 移植免疫学
- 器官保护科学 器官保护科学
- 内皮细胞生物学 内皮细胞生物学
背景情况:
- 延长ex vivo肺 perfusion (EVLP) 时间需要对肺功能进行代谢支持.
- 肝脏的支持,包括解毒和合成,可以在EVLP期间改善肺部的保存.
- 这项研究研究了通过RAGE-NF-κB信号传递对EVLP透物在肺内皮上的肝脏调节.
研究的目的:
- 为了证明 EVLP perfusate 对肺内皮的肝脏条件的影响.
- 调查RAGE-NF-κB信号在EVLP期间内皮损伤中的作用.
- 评估将肝功能纳入EVLP以改善肺部保存的潜力.
主要方法:
- 在体外实验中使用人类肺微血管内皮细胞 (HLMVEC) 和肝细胞.
- 四个实验组:新鲜的Steen溶液,EVLP'ed Steen对照,肝细胞条件的EVLP'ed Steen,以及EVLP'ed Steen中的RAGE抑制剂.
- 在24小时内,HLMVEC暴露于低氧 (1% O2) 状态,以评估NF-κB信号和内皮葡萄糖体损伤.
主要成果:
- 在 EVLP'ed Steen 中的缺氧显著提高了 NF-κB 信号的调节,并在 HLMVEC 中引起内皮损伤.
- 肝细胞调节溶液显著减弱NF-κB信号传递和内皮损伤.
- RAGE 抑制剂降低了 NF-κB 信号传递,但没有防止内皮糖核体损伤.
结论:
- 集成到EVLP中的肝功能在缺氧条件下改善了肺内皮细胞损伤.
- 将其他器官功能纳入 perfusion 平台可以增强肺移植的保存.
- 这项研究支持了EVLP多器官支持的概念,以改善结果.
相关概念视频
01:24Liver Regeneration
The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are large...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are large...
01:23Physiological Control of Respiration
Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
01:20Respiration and Gaseous Exchange
The intricate interplay between the cardiovascular and respiratory systems is crucial for efficiently transporting respiratory gases throughout the body. Let us explore the cardiovascular system's multifaceted functions, emphasizing its pivotal role in gas exchange.
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves the...
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves the...
01:24Factors Affecting Erythropoiesis
The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...
01:24External and Internal Respiration
External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...
01:30Liver Physiology
The liver, an essential organ in the human body, performs over 200 vital functions that can be broadly categorized into metabolic, hematological, endocrine regulation, and bile production.
Metabolic Regulation:
The liver is the central organ involved in regulating blood composition. It stabilizes blood glucose levels, maintaining them within the range of 70–110 mg/dL. When these levels drop, the liver breaks down glycogen reserves and releases glucose into the bloodstream. It can also...
Metabolic Regulation:
The liver is the central organ involved in regulating blood composition. It stabilizes blood glucose levels, maintaining them within the range of 70–110 mg/dL. When these levels drop, the liver breaks down glycogen reserves and releases glucose into the bloodstream. It can also...