摘要
阿尔茨海默病(AD)的生物标志物的发现是疾病治疗策略的关键。至目前为止,AD生物标志物的研究主要集中在脑成像和脑脊液(CSF)β-淀粉样蛋白(Aβ)肽和Tou蛋白的变化。通过纳入新的生物标志物优化其敏感性和特异性可以提高该组系列的可靠的程度。在这项研究中,我们确定在AD的进展中脑脊液神经生长因子(NGF)前体蛋白proNGF的水平是否升高,在临床诊断有轻度认知障碍(MCI)或AD的死者的脑组织样本的水平里反映有上调。紧急宗教团体研究中的参与者,临终前临床诊断为无认知功能障碍(NCI)、遗忘型MCI(aMCI、假定的AD先兆阶段)或轻/中度AD,从死者采集脑室脑脊液,运用免疫印迹分析进行测定。与NCI相比,aMCI 的proNGF水平增高55 %,AD 增高70%。脑脊液proNGF水平的升高与认知障碍测试的分数相关。在补充的研究中,我们发现与临床痴呆评定CDR = 0的患者相比,临床痴呆评定(CDR)= 0.5或1的患者的腰椎脑脊液CSF样本的proNGF水平显著增加 30%。值得注意的是,与对照组CDR= 0相比,CDR= 0.5或1的proNGF/Aβ1-42水平增高了50%。相比之下,aMCI和NCI患者脑脊液脑源性神经营养因子(BDNF)的ELISA测量值没有区别。总之,这些结果表明,proNGF蛋白水平可能增加目前用脑脊液的生物标志物面板有助诊断的的准确率。
关键词: 阿尔茨海默病,淀粉样蛋白,生物标志物,脑脊液,轻度认知功能障碍,神经生长因子前体,tau蛋白。
Current Alzheimer Research
Title:Cerebrospinal Fluid proNGF: A Putative Biomarker for Early Alzheimer’s Disease
Volume: 13 Issue: 7
Author(s): Scott E. Counts, Bin He, John G. Prout, Bernadeta Michalski, Lucia Farotti, Margaret Fahnestock, Elliott J. Mufson
Affiliation:
关键词: 阿尔茨海默病,淀粉样蛋白,生物标志物,脑脊液,轻度认知功能障碍,神经生长因子前体,tau蛋白。
摘要: The discovery of biomarkers for the onset of Alzheimer’s disease (AD) is essential for disease modification strategies. To date, AD biomarker studies have focused on brain imaging and cerebrospinal fluid (CSF) changes in amyloid- β (Aβ) peptide and tau proteins. While reliable to an extent, this panel could be improved by the inclusion of novel biomarkers that optimize sensitivity and specificity. In this study, we determined whether CSF levels of the nerve growth factor (NGF) precursor protein, proNGF, increased during the progression of AD, mirroring its up regulation in postmortem brain samples of people who died with a clinical diagnosis of mild cognitive impairment (MCI) or AD. Immunoblot analysis was performed on ventricular CSF harvested from participants in the Rush Religious Orders Study with an antemortem clinical diagnosis of no cognitive impairment (NCI), amnestic MCI (aMCI, a putative prodromal AD stage), or mild/moderate AD. ProNGF levels were increased 55% in aMCI and 70% in AD compared to NCI. Increasing CSF proNGF levels correlated with impairment on cognitive test scores. In a complementary study, we found that proNGF was significantly increased by 30% in lumbar CSF samples derived from patients with a clinical dementia rating (CDR) of 0.5 or 1 compared to those with a CDR = 0. Notably, proNGF/Aβ1-42 levels were 50% higher in CDR 0.5 and CDR 1 compared to CDR 0 controls. By contrast, ELISA measurements of CSF brain-derived neurotrophic factor (BDNF) did not distinguish aMCI from NCI. Taken together, these results suggest that proNGF protein levels may augment the diagnostic accuracy of currently used CSF biomarker panels.
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Cite this article as:
Scott E. Counts, Bin He, John G. Prout, Bernadeta Michalski, Lucia Farotti, Margaret Fahnestock, Elliott J. Mufson , Cerebrospinal Fluid proNGF: A Putative Biomarker for Early Alzheimer’s Disease, Current Alzheimer Research 2016; 13 (7) . https://dx.doi.org/10.2174/1567205013666160129095649
DOI https://dx.doi.org/10.2174/1567205013666160129095649 |
Print ISSN 1567-2050 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5828 |
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