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http://hdl.handle.net/2445/121061
Title: | Direct evidence of the presence of cross-linked Aβ dimers in the brains of Alzheimer's disease patients |
Author: | Vázquez de la Torre Cervera, Aurelio Gay i Marín, Marina Vilaprinyó Pascual, Sílvia Mazzucato, Roberta Serra Batiste, Montserrat Vilaseca Casas, Marta Carulla Casanovas, Natàlia |
Keywords: | Malaltia d'Alzheimer Marcadors bioquímics Alzheimer's disease Biochemical markers |
Issue Date: | 14-Mar-2018 |
Publisher: | American Chemical Society |
Abstract: | Brain-derived amyloid-β (Aβ) dimers are associated with Alzheimer´s disease (AD). However, their covalent nature remains controversial. This feature is relevant, as a covalent cross-link would make brain-derived dimers (brain dimers) more synaptotoxic than Aβ monomers and would make them suitable candidates for biomarker development. To resolve this controversy, we here present a three-step approach. First, we validated a type of synthetic cross-linked Aβ (CL Aβ) dimers, obtained by means of the photo-induced cross-linking of unmodified proteins (PICUP) reaction, as well-defined mimics of putative brain CL Aβ dimers. Second, we used these PICUP CL Aβ dimers as standards to improve the isolation of brain Aβ dimers and to develop state-of-the-art mass spectrometry (MS) strategies to allow their characterization. Third, we applied these MS methods to the analysis of brain Aβ dimer samples allowing the detection of the CL [Aβ(6-16)]2 peptide comprising a dityrosine cross-link. This result demonstrates the presence of CL Aβ dimers in the brains of patients with AD and opens up avenues for establishing new therapeutic targets and developing novel biomarkers for this disease. |
Note: | Versió postprint del document publicat a: http://dx.doi.org/10.1021/acs.analchem.7b04936 |
It is part of: | Analytical Chemistry, 2018 |
URI: | http://hdl.handle.net/2445/121061 |
Related resource: | http://dx.doi.org/10.1021/acs.analchem.7b04936 |
Appears in Collections: | Articles publicats en revistes (Institut de Recerca Biomèdica (IRB Barcelona)) |
Files in This Item:
File | Description | Size | Format | |
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1803_Ab_Native_CL_D_Anal_Chem.pdf | 3.13 MB | Adobe PDF | View/Open |
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