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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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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

Demetri Spyropoulos1, Dorea P Jenkins1, Steven L Carroll1

  • 1Medical University of South Carolina, Charleston, SC, USA.

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PubMed
まとめ
この要約は機械生成です。

ERBB4遺伝子の変異は、前頭側頭型認知症（FTD）および筋萎縮性側索硬化症（ALS）を引き起こす。変異マウスでは、空間学習および歩行におけるERBB4遺伝子量依存性の欠陥が観察され、ERBB4活性とこれらの神経変性疾患との関連が示唆される。

キーワード:
ERBB4前頭側頭型認知症筋萎縮性側索硬化症遺伝子量空間学習歩行マウスモデル神経変性疾患

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科学分野:

  • 神経科学;遺伝学;生化学

背景:

  • 前頭側頭型認知症（FTD）および前頭側頭葉変性症（FTLD）は、行動および実行機能を侵す進行性の神経変性によって特徴付けられる。;筋萎縮性側索硬化症（ALS）と併発することが多いFTLD-TDPは、TDP43封入体を伴う。;ERBB4遺伝子の常染色体優性変異は、家族性FTD/ALSまたはALSと関連付けられており、ERBB4活性の低下が観察されている。

研究 の 目的:

  • ERBB4変異に関連する神経病理を調査すること。;家族性ERBB4変異（p.I712Mおよびp.R927Q）を持つマウスモデルを生成および分析すること。;Erbb4変異マウスの行動、歩行、および体組成の変化を評価すること。

主な方法:

  • Erbb4ヘテロ接合体およびホモ接合体変異マウス（p.I712Mおよびp.R927Q）の作製。;空間学習のためのバーンズ迷路を用いた行動検査。;CatWalk-XTを用いた歩行および移動解析。;DXAスキャンによる体組成分析。

主要な成果:

  • Erbb4-R927Q変異体は、空間学習（バーンズ迷路）において遺伝子量依存的な欠陥を示した。;変異マウスは、後肢の足跡強度や着地パターンを含む歩行指標の変化を示した。;ホモ接合体では、体重、体脂肪率、骨塩量、骨ミネラル含有量の減少が観察された。

結論:

  • 初期の所見では、FTDおよびALSに関連する特徴を示すErbb4-R927Q変異体における遺伝子量依存的な異常が示唆される。;より広範なテスト、より多くの動物、およびErbb4-I712M変異を用いたさらなる研究が進行中である。;ErbB4発現介在ニューロンの喪失およびシナプス完全性を評価するための神経病理学的評価が進行中である。