Optimization protocol for amyloid-ß peptides detection in human cerebrospinal fluid using SELDI TOF MS.
Proteomics Clin Appl
; 4(3): 352-7, 2010 Mar.
Article
em En
| MEDLINE
| ID: mdl-21179888
ABSTRACT
PURPOSE:
The aim of the present work was to set up an optimized protocol for human cerebrospinal fluid amyloid-ß (Aß) profiling. EXPERIMENTALDESIGN:
We devised an immunoproteomic assay that employs monoclonal antibodies (mAbs) on Preactivated Surface (PS20) chip array followed by SELDI TOF MS. A comparison of a number of factors was performed, and the impact of these differences was noted. Each variable was tested using in parallel two different mAbs, 6E10 and 4G8. In addition, we tested whether the combined use of these two mAbs could improve the capture of N and C-terminally truncated Aß peptides and then the quality of spectra.RESULTS:
The best results were obtained using a mixture of Aß mAbs (0.125 µg/µL 6E10+4G8) 15 Aß peptides (including 3 N-terminally truncated forms) were detected. CONCLUSIONS AND CLINICAL RELEVANCE This approach has many potential advantages in speed, sensitivity and economy of reagents and could be helpful in order to define the role played by specific Aß truncated forms in cognitive decline.
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Base de dados:
MEDLINE
Assunto principal:
Imunoensaio
/
Peptídeos beta-Amiloides
/
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article