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Infection01:20

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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.
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Urinary Tract Infection II: Pathophysiology01:25

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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 (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 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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基礎科学と病態生理

Habbiburr Rehman1, Qiushan Tao2, Ting Fang Alvin Ang3,4

  • 1Biomedical Genetics, Department of Medicine, Boston University Medical School, Boston, MA, USA.

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PubMed
まとめ
この要約は機械生成です。

本研究は、軽度認知障害（MCI）および認知症と関連するMRIスキャンの特定の脳萎縮パターンを明らかにする。これらの変化は、認知機能低下およびアルツハイマー病のバイオマーカーと相関する。

キーワード:
脳萎縮MRIアルツハイマー病軽度認知障害認知機能低下バイオマーカー神経画像

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科学分野:

  • 神経画像
  • 神経学
  • バイオマーカー

背景:

  • アルツハイマー病（AD）認知症は、異常なタンパク質蓄積と脳細胞の喪失を伴います。
  • 脳萎縮の進行と認知症/認知機能障害との関連は不明なままです。

研究 の 目的:

  • 軽度認知障害（MCI）および認知症に関連する脳萎縮の縦断的変化を調査すること。
  • 認知機能低下を示す特定のMRI特徴および脳領域を特定すること。

主な方法:

  • フラミンガム心臓研究参加者（n=756）のMRIデータを利用しました。
  • 1126のMRI特徴を分析するために、線形混合効果モデルおよびANOVA同時成分分析（ALASCA）のための様々な線形関数を採用しました。
  • 認知正常、MCI、認知症群を含めました。

主要な成果:

  • MCIで52、認知症で143のMRI特徴を特定しました。
  • 主成分（PC）は、MCI/認知症群で対照群と比較して経時的に減少した明確な萎縮パターンを明らかにしました（M-PC1およびD-PC1）。
  • M-PC2およびD-PC2は、MCI群と認知症群の間で異なる傾向を示しました。
  • PCは、血漿バイオマーカー（p-tau181、t-tau）および認知機能（言語、記憶、実行機能、MMSE）と有意に関連していました。
  • 関与する主要な脳領域には、海馬、扁桃体、および視床枕が含まれます。

結論:

  • 海馬や扁桃体などの領域における脳萎縮の特定のパターンは、MCIおよび認知症と関連しています。
  • これらのMRI由来の特徴は、認知症の異質性および進行の理解に役立ちます。
  • 発見された脳領域およびバイオマーカーの役割が認知機能低下における役割を強調しています。