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Alzheimer's Disease: Overview01:26

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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.
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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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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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阿尔茨海默氏症成像联盟

Manpreet Singh1,2,3,4, Kimia Shafighi5, Flavie E Detcheverry1,2,3,4

  • 1University of Montreal, Montreal, QC, Canada.

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概括
此摘要是机器生成的。

白质超强度 (WMHs) 受多种组织的系统因素的影响,包括中枢神经系统,肝脏,心血管系统和脏. WMHs和阿尔茨海默病 (AD) 之间的遗传联系涉及血管内皮功能障碍.

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科学领域:

  • 神经成像遗传学 神经成像遗传学
  • 系统生物学 系统生物学
  • 阿尔茨海默氏症疾病研究研究

背景情况:

  • 白质超强度 (WMHs) 与衰老常见,在阿尔茨海默氏症 (AD) 中普遍存在,与血管机制和遗传性有关.
  • WMHs与AD共享遗传通路,这表明了重叠的遗传基础.
  • 整个大脑-身体轴对WMHs的系统影响及其与AD的遗传重叠尚未完全理解.

研究的目的:

  • 研究WMHs的遗传结构及其在脑体轴上与AD的重叠.
  • 确定导致WMH和AD的特定基因和生物学途径.
  • 建立遗传变异和与WMH相关的成像表型之间的因果关系.

主要方法:

  • 使用分层链接不平衡得分回归 (sLDSC) 进行分区遗传分析,并对组织和细胞进行特定注释.
  • 基于基因的关联分析 (MAGMA,FUSION) 与基因表达数据 (人类蛋白质图谱) 结合.
  • 使用定向非循环图 (MACAW) 的因果建模,将WMH相关的SNP与成像衍生的表型 (IDP) 联系起来.

主要成果:

  • 与WMH相关的SNP在中枢神经系统,肝脏,心血管系统和脏中得到丰富;与AD相关的SNP在中枢神经系统,结合性骨,肝脏和免疫组织中得到丰富.
  • 血管内皮细胞被确定为一种主要的细胞类型,富含WMH相关组织.
  • 因果分析将WMH相关的SNP与172个IDP联系起来,包括WM低敏度和区域大脑体积.

结论:

  • WMHs具有系统性,多组织的遗传贡献,涉及中枢神经系统,肝脏,心血管系统和脏.
  • 血管内皮功能障碍和与AD共享的基因是WMHs的关键驱动因素.
  • 整个身体的遗传变异可以影响与WMH和AD相关的脑成像表型.