通过调节补充体系统激活,C-反应蛋白减弱了CCl4诱导的急性肝损伤
Zhao-Ming Tang1, Ping Yuan2, Ning Gao3
1School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; Department of Nephrology, Nephrology & Critical Care Medicine of Xi'an International Science and Technology Cooperation Base, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
Molecular immunology
|February 26, 2025
概括
通过调节补充系统,C-反应蛋白 (CRP) 保护肝脏免受损伤. 缺乏CRP会使肝损伤恶化,而使用CRP会改善动物模型的结果,突出其治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 肝病学 肝病学是一种肝病学.
- 生物化学 生物化学
背景情况:
- 急性肝损伤 (ALI) 是一种肝功能障碍,没有先前存在的疾病.
- C-反应蛋白 (CRP) 是一种急性阶段蛋白质和炎症标志物.
- 碳四化物 (CCl4) 诱导的ALI中CRP的作用尚不清楚.
研究的目的:
- 调查CRP在CCl4诱导的ALI中的保护作用.
- 阐明CRP影响ALI的机制.
主要方法:
- 使用CRP淘汰和野生型小鼠和大鼠暴露于CCl4.
- 将外源性CRP给CRP淘汰的小鼠.
- 研究了补充系统组件 (H因子,C3) 和CRP受体 (FcγR2b) 的作用.
主要成果:
- CRP淘汰赛加剧了CCl4诱导的ALI,增加了组织损伤和减少了生存率.
- 外源性CRP给药在淘汰赛小鼠中挽救了ALI表型.
- CRP的保护包括通过FcγR2b独立的H因子招募来抑制终端补体通路的过度激活.
- 在补充C3淘汰赛小鼠中,CRP的保护作用丧失了.
结论:
- 通过CRP,可以防止CCl4引起的ALI.
- 通过调节补充激活,特别是通过抑制终端补充通路过度激活,CRP可以减轻ALI.
- CRP代表了管理ALI严重性的潜在治疗标.
相关概念视频
Liver 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...
Inflammatory Response
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Complement System
The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...
Acute Inflammation II: Local and Systemic Effects
Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
Cirrhosis II: Pathophysiology
Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...


