Agreement of amyloid PET and CSF biomarkers for Alzheimer's disease on Lumipulse
Objective To determine the cutoffs that optimized the agreement between F-18-Florbetapir positron emission tomography (PET) and A beta 1-42, A beta 1-40, tTau, pTau and their ratios measured in cerebrospinal fluid (CSF) on the LUMIPULSE G600II instrument, we quantified the levels of these four bioma...
| Autores: | , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau) |
| Repositorio: | r-IIB SANT PAU. Repositorio Institucional de Producción Científica del Instituto de Investigación Biomédica Sant Pau |
| OAI Identifier: | oai:iibsantpau.fundanetsuite.com:p2492 |
| Acceso en línea: | https://iibsantpau.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=2492 http://ddd.uab.cat/record/226601 |
| Access Level: | acceso abierto |
| Sumario: | Objective To determine the cutoffs that optimized the agreement between F-18-Florbetapir positron emission tomography (PET) and A beta 1-42, A beta 1-40, tTau, pTau and their ratios measured in cerebrospinal fluid (CSF) on the LUMIPULSE G600II instrument, we quantified the levels of these four biomarkers in 94 CSF samples from participants of the Sant Pau Initiative on Neurodegeneration (SPIN cohort) using the Lumipulse G System with available F-18-Florbetapir imaging. Methods Participants had mild cognitive impairment (n = 35), AD dementia (n = 12), other dementias or neurodegenerative diseases (n = 41), or were cognitively normal controls (n = 6). Levels of A beta 1-42 were standardized to certified reference material. Amyloid scans were assessed visually and through automated quantification. We determined the cutoffs of CSF biomarkers that optimized their agreement with F-18-Florbetapir PET and evaluated concordance between markers of the amyloid category. Results A beta 1-42, tTau and pTau (but not A beta 1-40) and the ratios with A beta 1-42 had good diagnostic agreement with F-18-Florbetapir PET. As a marker of amyloid pathology, the A beta 1-42/A beta 1-40 ratio had higher agreement and better correlation with amyloid PET than A beta 1-42 alone. Interpretation CSF biomarkers measured with the Lumipulse G System show good agreement with amyloid imaging in a clinical setting with heterogeneous presentations of neurological disorders. Combination of A beta 1-42 with A beta 1-40 increases the agreement between markers of amyloid pathology. |
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