激活Nrf2/HO-1信号通路会加剧胆固醇性肝损伤
Yi Wang1,2, Xiaolong Fu1,2, Li Zeng1,2
1Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, China.
Communications biology
|May 23, 2024
概括
核因素红色素2相关因子-2 (Nrf2) 和血红氧酶-1 (HO-1) 的激活通过增加胆红素来加剧胆固醇性肝损伤. 抑制HO-1或改善胆红素运输可以保护肝脏免受损伤.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 氧化压力是一种氧化压力.
背景情况:
- 核因子红色素2相关因子-2 (Nrf2) 信号通常被认为是肝保护性.
- 它在胆固醇性肝损伤 (CLI) 中的作用不明,有相互矛盾的证据.
研究的目的:
- 调查Nrf2/heme氧化酶-1 (HO-1) 途径在胆固醇性肝损伤中的特定作用.
- 为了确定Nrf2/HO-1激活是否在CLI中具有保护性或有害性.
主要方法:
- 使用了具有或没有胆固醇性肝损伤的Nrf2淘汰赛小鼠模型.
- 研究了抑制HO-1和调节胆红素运输的作用.
- 评估了线粒体功能和氧化应激标志物.
- 在患者血清样本中分析了Nrf2和HO-1表达.
主要成果:
- 在CLI模型中,Nrf2/HO-1激活会加剧肝损伤,这与一般假设相反.
- 抑制HO-1或改善胆红素运输缓解了肝损伤.
- 在非CLI条件下,Nrf2淘汰对CLI有保护作用,但在非CLI条件下恶化肝损伤.
- 胆红素积累损害了线粒体功能,并相互上调了Nrf2/HO-1.
结论:
- Nrf2/HO-1信号在胆固醇性肝损伤中起着有害的作用,促进肝损伤.
- 针对HO-1或胆红素运输可能为CLI提供治疗策略.
- Nrf2信号的功能取决于上下文,在CLI中有害,但在其他环境中具有保护作用.
相关概念视频
Liver Regeneration
3.2K
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...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
3.2K
NF-κB-dependent Signaling Pathway
7.4K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
7.4K
Cholesterol: Significance and Regulation
538
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
538
Peroxisomes
12.1K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
12.1K
Interactions Between Signaling Pathways
6.3K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.3K


