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阿尔茨海默氏症成像联盟

Cecilia Boccalini1, Ines Hristovska2, Débora E Peretti3

  • 1University of Geneva, Geneva, Switzerland, Switzerland.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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概括

阿尔茨海默病 (AD) 蛋白质沉积和神经退行症在区域上有所不同. 图像转录学揭示了与粉样蛋白,蛋白和神经退行相关的独特基因表达模式,解释了疾病的进展和脆弱性.

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科学领域:

  • 神经科学是一个神经科学.
  • 遗传学 是一个遗传学.
  • 生物标志物 生物标志物

背景情况:

  • 阿尔茨海默病 (AD) 的特点是空间和时间上不同的蛋白质沉积和神经退行.
  • 了解AD中区域大脑脆弱性的分子基础至关重要.

研究的目的:

  • 研究阿尔茨海默病中amyloid,tau和神经退行症的神经成像表型中区域变异的基础生物和分子性质.
  • 为了将区域基因表达与AD病理的体内成像标志物相关联.

主要方法:

  • 利用图像转录组学,将阿尔茨海默病患者和对照组的PET/MRI数据与来自艾伦人类大脑图谱的区域基因表达数据结合起来.
  • 采用基因与生物标志物关联的假设驱动分析和数据驱动的过度表示分析 (ORA) 和基因组丰富分析 (GSEA) 来识别分子途径.

主要成果:

  • 粉样蛋白负载在额叶和叶最高; tau在中间叶和叶区域;神经退行在叶区域.
  • 与蛋白质合成,免疫调节和与粉样蛋白负载相关的神经炎症相关的基因.
  • 参与突触组织,传播和功能的基因与粉样蛋白,蛋白和神经退行症的严重程度有关.

结论:

  • 差异性基因表达解释了AD中粉样蛋白,蛋白和神经退行症的空间和时间脱.
  • 共享的分子机制将粉样蛋白积累与下游的病理和神经元损失联系起来.
  • 特定的AD脆弱性与不同的基因表达特征和分子特性有关.