在Normothermic机器输液过程中脏代谢与体外条件大大不同
Baran Ogurlu1, L Annick van Furth1, You Zuo1
1Department of Surgery-Organ Donation and Transplantation, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
Transplantation
|December 3, 2025
概括
常温机器输液 (NMP) 改变了脏的新陈代谢,增加了氨基酸分解和降低了胺代谢. 这些代谢转变与在体外保存过程中增加的免疫反应和细胞死亡有关.
科学领域:
- 器官移植研究器官移植研究
- 生物医学工程 生物医学工程
- 脏生理学 脏生理学
背景情况:
- 常温机器输液 (NMP) 是评估已故捐赠者的活性的有前途的技术.
- 了解ex vivo代谢对于优化NMP至关重要.
- 热性缺血对ex vivo代谢的影响需要进一步研究.
研究的目的:
- 为了探索ex vivo和in vivo脏之间的代谢差异.
- 评估热性缺血对体新陈代谢的影响.
- 调查NMP期间代谢变化和细胞过程之间的联系.
主要方法:
- 应用到猪脏的多组学方法 (代谢学,转录学,蛋白学).
- 微小脏与75分钟热性缺血的比较.
- 在体内采集的组织分析,冷保存后和NMP后.
主要成果:
- NMP改变了脏的新陈代谢,增加了分支链氨基酸代谢和降低了pyrimidine的代谢.
- 观察到增强的葡萄糖分解,减少的葡萄糖生成,TCA循环受损和NAD+耗尽.
- 在NMP期间,代谢变化与增加的免疫反应和细胞死亡相关.
结论:
- 在体内和体外之间存在显著的代谢差异.
- NMP诱导了与潜在有害的细胞过程相关的代谢变化.
- 这些发现强调了需要策略来缓解ex vivo代谢变化.
相关概念视频
What Are Osmoregulation and Excretion?
Organisms must keep bodily fluids at a constant temperature and pH while maintaining specific solute concentrations in order to support life functions. Osmoregulation is the process that balances solute and water levels.
Body Temperature
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Mechanism of heat transfer
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
Factors Affecting Body Temperature
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
Requirements for Human Life
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Body Temperature
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...


