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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: Pathogenesis01:23

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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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Stages of Infection01:26

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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 Pathogens01:31

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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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基礎科学と病態生理

Jia Shin1, Erica Brady1, Stephanie R Miller1

  • 1Gladstone Institute of Neurological Disease, University of California San Francisco, San Francisco, CA, USA.

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PubMed
まとめ
この要約は機械生成です。

ヒト化ApoE4とAppNL-F変異を組み合わせたマウスは、活動低下と神経炎症を引き起こした。これらのマウスにおけるAβプラークの減少は、種特異的な違いを強調し、アルツハイマー病におけるヒト化モデルの必要性を強調している。

キーワード:
アルツハイマー病ApoE4AppNL-Fマウスモデル神経炎症アミロイドβ種差

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科学分野:

  • 神経科学; 遺伝学; 分子生物学

背景:

  • ヒト化アポリポタンE4（ApoE4）は、後期発症アルツハイマー病（AD）の重要な遺伝的危険因子である。; ApoE4は、シナプス機能障害、神経炎症、およびアミロイドβ（Aβ）クリアランスの障害に関連している。; AppNL-Fノックインマウスモデルは、ネイティブな遺伝子調節を維持しながら、ヒトAβ病態生理を再現する。

主な方法:

  • ApoE4/AppNL-F（E4NLF）、ApoE4（E4）、AppNL-F（NLF）、および野生型（WT）の4つの遺伝子型を生成した。; 機械学習分析を用いたオープンフィールド行動試験を利用した。; 免疫組織化学によるAβプラークおよびミクログリア反応性を定量化した。; ELISAを用いた可溶性Aβ42/40レベルを測定し、snRNA-seqによる差次的発現遺伝子（DEG）を同定した。

結論:

  • ApoE4とAppNL-F変異の組み合わせは、神経炎症やグリア機能障害を含む、AD関連の異なる表現型を誘発する。; E4NLFマウスにおけるAβプラークの減少は、AβクリアランスおよびApoEアイソフォーム機能における種特異的な違いを強調する。; ADにおけるApoEの役割を研究するためには、ヒトApoE生物学をモデル化するマウスの限界により、ヒト化モデルが必要である。