基础科学和病原发生学
Liyong Wang1, Wanying Xu2, Maria C Robayo1
1John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
欧洲血统显示出更强的APOE基因相互作用,这可能解释了阿尔茨海默氏症风险更高. 非洲祖先抑制了这些相互作用,揭示了阿尔茨海默病的祖先特异性调节机制.
科学领域:
- 基因组学就是基因组学.
- 神经科学是一个神经科学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- APOEε4等位基因是阿尔茨海默病 (AD) 的主要遗传风险因素.
- APOEε4的效应大小因祖先种群而异,非西班牙裔白人比非裔美国人更大.
- 在APOE周围的本地祖先 (LA) 影响遗传风险和基因表达,欧洲 (EU) LA与非洲 (AF) LA相比具有更高的风险和表达.
研究的目的:
- 为了研究不同祖先背景的APOE位点的3D基因组结构.
- 为了检查APOE中的染色质相互作用如何在欧洲和非洲当地祖先之间存在差异.
主要方法:
- 在额叶皮层和iPSC衍生的微质细胞 (iMGLs) 上利用了增强的Hi-C捕获分析 (eHiCA).
- 在APOE中分析了来自具有同卵性非洲 (AF) 和欧洲 (EU) LA的ε4/ε4载体的样本.
- 使用HiCorr和DeepLoop处理的Hi-C数据用于增强的染色体相互作用映射.
主要成果:
- 在前皮层的APOE位置和iMGL中观察到祖先偏差的染色体相互作用.
- 在EU LA中表现出显著的长距离染色体相互作用 (190 kb和440 kb的APOE下游),而不是在AF LA中.
- 在AFLA中,长距离相互作用被抑制,在两种祖先中只存在短距离相互作用.
结论:
- 与AF基因组相比,EU基因组在APOE表现出更强烈和更多的染色质相互作用.
- 这些相互作用与欧盟LA中染色质可访问性增加相关,这可能解释了欧盟大脑中APOEε4表达的增加.
- eHiCA确定了祖先偏见的染色体相互作用,提供了对AD调节机制和更广泛的AD调节格局的见解.
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


