Mass spectrometry as an efficient tool for the characterization of amyloid ß peptide 25-35 self-assembly species in aggregation and inhibition studies.
Eur J Mass Spectrom (Chichester)
; 19(6): 483-90, 2013.
Article
em En
| MEDLINE
| ID: mdl-24378466
ABSTRACT
Amyloid beta 25-35 [Aß (25-35)], as a peptide model for full-length Aß in structural and functional investigations, has been chosen for aggregation studies. The complexity of the Aß (25-35) aggregation process required a multi-methodological analytical approach to obtain reliable and reproducible results. Here, we describe the results obtained by the use of mass spectrometry (MS) for the structural characterization of the self-assembly species during the aggregation process and for the definition of the self-assembly kinetics and myricetin inhibition patterns, comparing the results with those obtained by using the well-established spectroscopic method based on thioflavin T fluorescence. Flow injection electrospray ionization-ion trap-mass spectrometry (ESI-IT-MS) was applied to monitor the disappearance of the monomer specie in the first steps, whereas matrix-assisted laser desorption/ionization-time of flight-mass spectrometry (MALDI-ToF-MS) was used to follow monomer and small oligomer self-assembly trends in the early stages of the nucleating process.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Peptídeos beta-Amiloides
/
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
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Modelos Químicos
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article