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Título: | Alterations in the balance of amyloid-β protein precursor species in the cerebrospinal fluid of Alzheimer's disease patients |
Autor: | López-Font, Inmaculada CSIC ORCID; Boix, Claudia P. CSIC; Zetterberg, Henrik; Blennow, Kaj; Sáez-Valero, Javier CSIC ORCID | Palabras clave: | AβPP Alzheimer’s disease Biomarker Cerebrospinal fluid KPI |
Fecha de publicación: | 2017 | Editor: | IOS Press | Citación: | Journal of Alzheimer's Disease 57(4): 1281-1291 (2017) | Resumen: | We recently demonstrated that soluble forms of the amyloid-β protein precursor (sAβPP) assemble into multimeric complexes in cerebrospinal fluid (CSF), which contributes to the underestimation of specific sAβPP species when assessed by ELISA. To circumvent this issue, we analyzed by SDS-PAGE large fragments of sAβPP and their variants in the CSF from Alzheimer's disease (AD; n = 20) and control (n = 20) subjects, probing with specific antibodies against particular domains. Similar levels of sAβPPα and sAβPPβ protein were found in CSF samples from AD and controls, yet there appeared to be a shift in the balance of the soluble full-length AβPP (sAβPPf) species in AD samples, with a decrease in the proportion of the lower (∼100 kDa) band relative to the upper (∼120 kDa) band. Similar differences were observed in the contribution of the major KPI-immunoreactive AβPP species. CSF samples also displayed differences in the correlations of AβPP species with classical AD biomarkers, particularly with respect to the Aβ42 peptide. The differences reveal alterations that probably reflect pathophysiological changes in the brain. | Versión del editor: | https://doi.org/10.3233/JAD-161275 | URI: | http://hdl.handle.net/10261/288567 | DOI: | 10.3233/JAD-161275 | E-ISSN: | 1875-8908 |
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