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相关概念视频

Infection01:20

Infection

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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...
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Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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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...
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Cystic Fibrosis: Pathogenesis

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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.
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The pathophysiology of pneumonia involves the following steps:
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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...
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Defense Against Bacterial Pathogens

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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
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基础科学和病原发生学

Xuelin Gu1, Tim Distel1, Konrad Talbot1

  • 1Loma Linda University, Loma Linda, CA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
概括

大脑的胰岛素抵抗,标志着高的IRS-1pS616,随着年龄的增长和阿尔茨海默病痴呆症 (ADd) 的峰值. 这种病理与阿尔茨海默氏症的特征相关,表明它在疾病发展中的作用以及作为治疗生物标志物的潜力.

科学领域:

  • 神经科学是一个神经科学.
  • 病理学 病理学 病理学
  • 生物标志物发现发现

背景情况:

  • 阿尔茨海默氏病 (AD) 的发病包括β-粉样蛋白和tau,脑中的胰岛素抵抗也是一个共同特征.
  • 在AD痴呆症 (ADd) 神经元中发现素-616 (IRS-1 pS616) 酸化的胰岛素受体基质-1升高.
  • 一种抗糖尿病药物塞马格卢提德正在阿尔茨海默病的临床试验中,突出了针对胰岛素抵抗的治疗潜力.

研究的目的:

  • 在正常和ADD病例的海马神经元中量化IRS-1 pS616.
  • 调查IRS-1 pS616,AD病理和受试者的人口统计数据之间的相关性.
  • 探索IRS-1 pS616作为AD中大脑胰岛素抵抗的潜在生物标志物.

主要方法:

  • 从217个年龄和性别匹配的病例 (NCI,临床前,MCI,ADd) 的海马区切片上的免疫组织化学.
  • 使用基于AI的数字病理学 (U-Net神经网络) 来量化β-粉样蛋白,-和IRS-1 pS616.
  • 分析病理,年龄和ApoE基因型之间的相关性.

主要成果:

  • 在正常组织中,IRS-1 pS616密度随着年龄的增长而增加,但在ADd中升高并随着年龄的降低.
  • IRS-1 pS616病理与β-粉样蛋白,-和布拉克阶段正相关.

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  • 在ApoE基因型之间没有发现ADd病态的显著差异.

    • 结论:

    • 大脑的胰岛素耐药性,由IRS-1 pS616表示,随着年龄的增长,ADd达到顶峰,随着神经退行症而下降.
    • 细胞质IRS-1 pS616在神经元中的积累与AD病变发生有关.
    • IRS-1 pS616可以作为大脑胰岛素抵抗的生物标志物和AD治疗的目标.