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Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451
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アルツハイマー病イメージングコンソーシアム

Manvir Lalia1, Stephan Wagner1, Selina Hummel1

  • 1LMU University Hospital, Munich, Germany.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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PubMed
まとめ
この要約は機械生成です。

アルツハイマー病(AD)マウスモデルでは、ミクログリアが脳領域間の代謝結合の増加を促進します。この研究により、ミクログリアがADにおける脳代謝の変化の主要な細胞源であることが特定されました。

キーワード:
アルツハイマー病ミクログリア代謝結合イメージングマウスモデル

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Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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Lesion Explorer: A Video-guided, Standardized Protocol for Accurate and Reliable MRI-derived Volumetrics in Alzheimer's Disease and Normal Elderly
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Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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科学分野:

  • 神経科学;分子イメージング;細胞生物学

背景:

  • 分子イメージングと結合解析は、神経変性疾患の病態生理に新たな洞察を提供します。;代謝結合は、ヒトおよび哺乳類の脳で変化したパターンを示しますが、細胞源は不明のままです。;この研究では、アルツハイマー病(AD)マウスモデルにおける代謝結合の細胞ドライバーを調査します。

研究 の 目的:

  • ADマウスモデルにおける代謝結合の変化の原因となる細胞源を特定すること。;ADマウスと野生型(WT)対照との間の細胞特異的なグルコース代謝を比較すること。

主な方法:

  • APP NL-G-FマウスとWT対照における代謝結合を評価するために、F-18-FDGを用いた陽電子放出断層撮影/磁気共鳴画像法(PET/MRI)を使用しました。;脳を解剖して、ミクログリア、アストロサイト、オリゴデンドロサイト、ニューロンを分離し、細胞特異的なF-18-FDG取り込みを測定しました。;代謝結合パターンを決定するために、地域間相関を計算しました。

主要な成果:

  • APP NL-G-Fマウスは、WTマウスと比較して、全体的なF-18-FDG取り込みが高く、前脳-後脳間の代謝結合が増加していました。;ミクログリアは、両方のモデルで最も高い単一細胞F-18-FDG取り込みを示しました。;ADマウスでは、ミクログリア、アストロサイト、オリゴデンドロサイトの取り込みが増加しましたが、ニューロンの取り込みは減少しました。ミクログリアの取り込みは、代謝結合と強く相関していました。

結論:

  • ミクログリアは、ADマウスモデルで観察された前脳-後脳間の代謝結合の増加の主な推進力です。;これらの発見は、ADの病態生理におけるミクログリア代謝の重要な役割を強調しています。;ミクログリアの遺伝子発現に関するさらなる研究は、神経変性における代謝結合の分子メカニズムを解明する可能性があります。