Proteomic studies on the role of Apolipoprotein E and other amyloid associated proteins in AD

项目1-总结/摘要 在发病年龄、神经病理学和疾病进展率方面， 阿尔茨海默病（AD）患者。为什么有些病人特别容易发展成 AD还没有被理解。我们最近发现患有快速进展的阿尔茨海默病的人 （rpAD）的淀粉样斑块蛋白质组与典型散发性AD的淀粉样斑块蛋白质组显著不同。这些牌匾 AD亚型之间的蛋白质差异提供了对有助于斑块发展的因素的深入了解， 可能影响AD进展速度的因素。我们已经生成了初步数据， 表明在另一个AD患者亚组中也存在类似的斑块蛋白质组差异 易患AD;载脂蛋白E4携带者。载脂蛋白E4和载脂蛋白E3携带者的斑块蛋白质组比较 在rpAD中改变最多的斑块蛋白中发现了类似的蛋白差异， apoE 4携带者斑块相关星形胶质细胞蛋白水平降低。在这个项目中，我们将测试 假设apoE 4携带者将具有显著改变的淀粉样斑块蛋白质组， 脑淀粉样血管病（CAA）与apoE 3和apoE 2携带者相比。我们预计 apoE 4携带者中的蛋白质组差异将与在rpAD中观察到的相似。这项研究将确定 在特别易患AD的个体中，斑块和CAA中存在的蛋白质差异;特别是 比较由apoE 4、apoE 3和apoE 2表达引起的蛋白质差异。重要的是，我们将 确定apoE 2、3和4载体的蛋白质组组成，用于临床前AD的全谱 正常、轻度认知障碍和晚期AD。这些数据将用作比较人类数据集 用于项目1和2中提出的啮齿动物蛋白质组学研究。我们将识别和验证蛋白质差异， 是特别感兴趣的，代表潜在的新的治疗靶点和AD的生物标志物。的 具体目标是： 1)表征apoE 4、apoE 3和apoE 2携带者之间的斑块蛋白质组的差异， 临床前认知正常、MCI和晚期AD病例。 2)脑淀粉样血管病apoE 4、apoE 3蛋白质组的差异分析 在临床前认知正常、MCI和晚期AD患者中apoE 2携带者。 3)验证新型淀粉样蛋白相关蛋白在AD神经病理学病变中的蓄积 并确定这些蛋白质在驱动AD病理发展中的作用。

PROJECT 1- SUMMARY/ABSTRACT There is a large degree of heterogeneity in the age of onset, neuropathology and rate of disease progression in patients with Alzheimer's disease (AD). Why some patients are particularly vulnerable to the development of AD is still not yet understood. We recently showed that people with rapidly progressive Alzheimer's disease (rpAD) had a significantly different amyloid plaque proteome from those with typical sporadic AD. These plaque protein differences between AD subtypes offered insight into factors that contribute to plaque development and factors that may influence the rate of progression of AD. We have since generated preliminary data that suggests that similar plaque proteomic differences are also present in another subgroup of AD patients vulnerable to AD; apoE4 carriers. The comparison of the plaque proteome in apoE4 and apoE3 carriers identified similar protein differences in plaque proteins that were most altered in rpAD, as well as similarly decreased levels of plaque-associated astrocyte proteins in apoE4 carriers. In this project we will test the hypothesis that apoE4 carriers will have a significantly altered proteome of amyloid plaques and cerebral amyloid angiopathy (CAA) in comparison to apoE3 and apoE2 carriers. We expect that proteomic differences in apoE4 carriers will be similar to those observed in rpAD. This study will identify protein differences present in plaques and CAA in individuals particularly vulnerable to AD; specifically comparing the protein differences that result from apoE4, apoE3 and apoE2 expression. Importantly, we will determine the proteome composition of apoE2, 3 and 4 carriers for the full spectrum of AD from preclinical normal, mild cognitive impairment and late stage AD. This data will be used as a comparative human dataset for rodent proteomic studies proposed in projects 1 and 2. We will identify and validate protein differences that are of particular interest, which represent potential novel therapeutic targets and biomarkers of AD. The specific aims are: 1) Characterize the differences in the plaque proteome between apoE4, apoE3 and apoE2 carriers in preclinical cognitivenormal, MCI and late AD cases. 2) Characterize the differences in the cerebral amyloid angiopathy proteome between apoE4, apoE3 and apoE2 carriers in preclinical cognitive normal, M CI and late AD case s. 3) To validate the accumulation of novel amyloid associated proteins in AD neuropathological lesions and to determine the role of these proteins in driving AD pathology development.