基础科学和病原发生学
Luciana Bertholim Nasciben1, Derek Van Booven2, Wanying Xu3
1University of Miami Miller School of Medicine, Miami, FL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
阿尔茨海默病 (AD) 的保护性等位基因与APOE基因相互作用. 这种相互作用涉及到一个独特的VNTR区域,为AD提供潜在的治疗点.
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.
- 人类遗传学 人类遗传学
背景情况:
- 一个特定的等位基因 (rs10423769 A) 在APOEε4同胞体中降低了高达75%的阿尔茨海默病 (AD) 风险.
- 了解这种保护变异的机制可能会导致APOEε4载体的新疗法.
- 围绕保护变异的基因组区域复杂,具有细分重复 (SD) 和结构变异 (SV).
研究的目的:
- 使用先进技术研究保护性rs10423769 A等位基因和APOE基因之间的基因组区域.
- 为了阐明这种变体所赋予的潜在的AD保护机制.
- 分析复杂的基因组景观,包括SD和SV.
主要方法:
- 在9个样本上进行了高覆盖率PacBio HiFi全基因组测序.
- 基因组组装和比较分析使用hifiasm,minigraph和bandage进行.
- 使用Hi-C测序和内部生物信息学工具 (eHiCA) 来识别潜在的染色体相互作用.
主要成果:
- 长读数测序确定了一个扩展的VNTR与MEF2D转录因子结合位在保护性单元型.
- 在Rs10423769 A亚型组周围的SD区域检测到更多的SVs.
- eHiCA揭示了rs10423769位点,APOE促进体和包括ZNF基因在内的干预区域之间的长距离物理相互作用的证据.
结论:
- 非洲起源的保护性哈普洛型表现出与APOE促进体和其他chr19区域的长距离物理相互作用.
- 这种保护性单元型含有扩展的VNTR,具有多个转录因子结合位.
- 这些发现提供了对AD风险降低背后的基因组机制的见解.
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


