基础科学和病原发生学
Altan Rentsendorj1, Dieu-Trang Fuchs2, Jean-Philippe Vit1
1Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-SInai Medical Center, Los Angeles, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
概括
阿尔茨海默病 (AD) 病理影响视网膜,导致突触损失和降低UCH-L1水平. 这些变化与认知衰退和大脑病理相关,这表明UCH-L1作为AD生物标志物的潜力.
科学领域:
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
- 生物化学 生物化学
背景情况:
- 阿尔茨海默病 (AD) 病理延伸到视网膜,影响神经感官功能.
- 乌比奎丁碳素终端化酶L1 (UCH-L1) 涉及AD脑病理,但其视网膜作用尚不清楚.
研究的目的:
- 调查视网膜中的UCH-L1表达及其与阿尔茨海默病中突触完整性和认知功能的关系.
- 探索视网膜作为AD生物标志物的潜在位置.
主要方法:
- 免疫组织化学和质谱学被用来分析死后视网膜,来自AD,轻度认知障碍 (MCI) 和对照个体.
- 视网膜突触完整性标记物和UCH-L1水平被量化并与大脑病理 (Braak,ABC分数) 和认知功能 (MMSE,CDR分数) 相相关.
- 基于人工智能的随机森林分析确定了疾病状况的关键预测因素.
主要成果:
- 在MCI和AD视网膜的内外形层中观察到显著的突触损失 (前和后突触标志物).
- 与膜相关的UCH-L1 (UCH-L1M) 的水平在MCI和AD视网膜中显著降低.
- 视网膜突触损失和UCH-L1M下降与粉样β (Aβ),酸化,认知障碍和AD脑病理有很强的相关性.
结论:
- 早期和实质性的突触损失和UCH-L1M下降发生在MCI和AD患者的视网膜中.
- UCH-L1M是陶氏病变进展和认知障碍的重要预测因素,表明其作为AD检测生物标志物的潜力.
- UCH-L1M也可能代表阿尔茨海默病的治疗点.
相关概念视频
01:20Infection
11.6K
When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
11.6K
01:25Urinary Tract Infection II: Pathophysiology
524
The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
524
01:23Cystic Fibrosis: Pathogenesis
676
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
676
01:29Pneumonia II: Pathophysiology
2.5K
The pathophysiology of pneumonia involves the following steps:
2.5K
01:26Stages of Infection
64.7K
Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
64.7K
01:31Defense Against Bacterial Pathogens
2.6K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
2.6K