基础科学和病原发生学
Keith P Smith1, Taylor A Strope2,3, Brittany M Hauger3
13901 rainbow blvd, Kansas City, KS, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
线粒体功能障碍在与唐氏综合征相关的阿尔茨海默病 (DSAD) 中突出,大脑线粒体中的粉样蛋白前体蛋白 (APP) 增加. 这种病理反映在DSAD大脑器官模型中.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 阿尔茨海默病 (AD) 的特点是线粒体功能障碍和粉样β (Aβ) 积累.
- 这些特征在唐氏综合征相关的阿尔茨海默氏症 (DSAD) 的病理作用尚不清楚.
研究的目的:
- 为了研究线粒体功能,Aβ积累和DSAD中的APP局部化.
- 为了比较DSAD病理与零星AD (sAD) 和没有AD的唐氏综合征 (DS).
主要方法:
- 从DSAD,DS和非DS (ND) 个体中对死后脑组织的分析.
- 利用人类诱导的多能干细胞 (iPSC) 模型分化成大脑器官.
- 通过海马XF分析仪评估线粒体功能,通过西部血栓测试评估蛋白质水平,通过ELISA评估Aβ.
- 在大脑和线粒体样本上进行蛋白质组分析.
主要成果:
- DSAD脑组织显示线粒体功能显著降低,线粒体中全长APP增加.
- 在DSAD中,线粒体功能障碍比sAD更严重.
- 大脑器官模型重复了DSAD表型,包括线粒体APP增加和线粒体功能受损.
- 蛋白质组学揭示了DSAD中炎症和线粒体路径的差异表达.
结论:
- DSAD的特点是大脑中深层次的线粒体功能障碍,这种功能在脑器官模型中是可重现的.
- 在线粒体内增加APP积累是DSAD病理学的关键特征.
相关概念视频
Infection
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
Urinary 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
Cystic 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
Pneumonia II: Pathophysiology
2.5K
The pathophysiology of pneumonia involves the following steps:
2.5K
Stages 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
Defense 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


