- 作者：Katharina Buerger ; Giovanni Frisoni ; Olga Uspenskaya ; Michael Ewers ; Henrik Zetterberg ; Cristina Geroldi ; Giuliano Binetti ; Peter Johannsen ; Paolo Maria Rossini ; Lars-Olof Wahlund ; Bruno Vellas ; Kaj B
- 关键词：Alzheimer’ ; s disease (AD) ; Mild cognitive impairment (MCI) ; Alzheimer’ ; s Disease Neuroimaging Initiative (ADNI) ; Biological marker ; Validation
- 刊名：Experimental Gerontology
- 出版年：2009
- 出版时间：September 2009
- 年：2009
- 卷：44
- 期：9
- 页码：579-585
- 全文大小：305 K
BackgroundAlzheimer’s Disease Neuroimaging Initiatives (“ADNI”) aim to validate neuroimaging and biochemical markers of Alzheimer’s disease (AD). Data of the pilot European-ADNI (E-ADNI) biological marker programme of cerebrospinal fluid (CSF) and plasma candidate biomarkers are reported.Methods
Six academic EADC centres recruited 49 subjects (healthy controls, subjects with mild cognitive impairment (MCI) and AD). We measured CSF β-amyloid 42 (CSF Aβ42), total tau-protein (t-tau), phosphorylated tau-proteins (P-tau181, P-tau231), plasma β-amyloid 40 and 42 (Aβ40/Aβ42). Immediate fresh shipment was compared to freezing and later shipment on dry ice.
Results
CSF T-tau (fresh samples) was increased in AD versus controls (p = 0.049), CSF Aβ42 (frozen samples) was decreased in MCI and AD (p = 0.02), as well as plasma Aβ40 (fresh and frozen samples) in AD (p = 0.049 and p = 0.016). Pooled values of neurochemical parameters and ratios thereof were different between centres (p < 0.005). Analysis of frozen samples yielded higher diagnostic accuracy than immediate fresh shipment with 100 % (fresh: 100 % ) correctly classified in control subjects, 100 % (78 % ) in MCI, 91 % (91 % ) in AD.
Conclusion
The use of frozen rather than fresh samples renders higher diagnostic accuracy within a multicentre context. We confirmed the feasibility of a multicentre AD biomarker programme for future clinical trials.