- Alzheimer’s disease
- Cerebrospinal fluid
- Protein biochip
Amyloid-β peptides (Aβ) are major components of amyloid plaques in the Alzheimer’s disease (AD) brain and have been proposed as diagnostic markers in cerebrospinal fluid (CSF). Aβ derived from brain may be processed into fragments before emerging in CSF. Therefore, we determined mass profiles of Aβ peptides in CSF of patients with AD and age-matched healthy control subjects (CTR) by using protein biochip technology. Aβ peptides were captured on the chip surfaces (spots) by the specific monoclonal antibody 6E10 and were then analyzed by integrated surface-enhanced laser desorption and ionization time-of-flight mass spectrometry (SELDI-TOF-MS). We found Aβ species with mean molecular masses at 1,583.3 Da (corresponding to Aβ2–14), 2,068.5 Da (Aβ1–17), 2,166.4 Da (Aβ1–18), 3,676.6 Da (Aβ1–33), 3,789.4 Da (Aβ1–34), 4,076.9 Da (Aβ1–37), 4,134.0 Da (Aβ1–38), 4,233.3 Da (Aβ1–39), 4,332.4 Da (Aβ1–40) and 4,516.8 Da (Aβ1–42) in both AD (n = 24) and CTR (n = 24) subjects. Aβ1–38 appeared to be a major Aβ species in human CSF along with Aβ1–40. Quantitation revealed that CSF levels of Aβ1–38 were significantly decreased in AD as compared to CTR subjects. The CSF profile of Aβ peptides may be used for diagnostic and therapeutic purposes in clinical studies.
Copyright © 2004 S. Karger AG, Basel
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Christoph Hock, MD
Division of Psychiatry Research
Psychiatric University Hospital Zürich, Lenggstrasse 31
CH–8029 Zürich (Switzerland)
Tel. +41 44 384 2271, Fax +41 44 384 2275, E-Mail email@example.com
Number of Print Pages : 5
Number of Figures : 3, Number of Tables : 1, Number of References : 24
Vol. 1, No. 4-5, Year 2004 (Cover Date: Released November 2004)
Journal Editor: R.M. Nitsch, Zürich; C. Hock, Zürich
ISSN: 1660–2854 (print), 1660–2862 (Online)
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