BACKGROUND: Numerous studies show that the cerebrospinal fluid biomarkers total tau (T-tau), tau phosphorylated at threonine 181 (P-tau(181P)), and amyloid-β (1-42) (Aβ(1-42)) have high diagnostic accuracy for Alzheimer's disease. Variability in concentrations for Aβ(1-42), T-tau, and P-tau(181P) drives the need for standardization. METHODS: Key issues were identified and discussed before the first meeting of the members of the Alzheimer's Biomarkers Standardization Initiative (ABSI). Subsequent ABSI consensus meetings focused on preanalytical issues. RESULTS: Consensus was reached on preanalytical issues such as the effects of fasting, different tube types, centrifugation, time and temperature before storage, storage temperature, repeated freeze/thaw cycles, and length of storage on concentrations of Aβ(1-42), T-tau, and P-tau(181P) in cerebrospinal fluid. CONCLUSIONS: The consensus reached on preanalytical issues and the recommendations put forward during the ABSI consensus meetings are presented in this paper.
BACKGROUND: Numerous studies show that the cerebrospinal fluid biomarkers total tau (T-tau), tau phosphorylated at threonine 181 (P-tau(181P)), and amyloid-β (1-42) (Aβ(1-42)) have high diagnostic accuracy for Alzheimer's disease. Variability in concentrations for Aβ(1-42), T-tau, and P-tau(181P) drives the need for standardization. METHODS: Key issues were identified and discussed before the first meeting of the members of the Alzheimer's Biomarkers Standardization Initiative (ABSI). Subsequent ABSI consensus meetings focused on preanalytical issues. RESULTS: Consensus was reached on preanalytical issues such as the effects of fasting, different tube types, centrifugation, time and temperature before storage, storage temperature, repeated freeze/thaw cycles, and length of storage on concentrations of Aβ(1-42), T-tau, and P-tau(181P) in cerebrospinal fluid. CONCLUSIONS: The consensus reached on preanalytical issues and the recommendations put forward during the ABSI consensus meetings are presented in this paper.
Authors: Marta Cosín-Tomás; Anna Antonell; Albert Lladó; Daniel Alcolea; Juan Fortea; Mario Ezquerra; Albert Lleó; Maria José Martí; Mercè Pallàs; Raquel Sanchez-Valle; José Luís Molinuevo; Coral Sanfeliu; Perla Kaliman Journal: Mol Neurobiol Date: 2016-09-08 Impact factor: 5.590
Authors: Ann Hake; Paula T Trzepacz; Shufang Wang; Peng Yu; Michael Case; Helen Hochstetler; Michael M Witte; Elisabeth K Degenhardt; Robert A Dean Journal: Alzheimers Dement Date: 2015-04-24 Impact factor: 21.566
Authors: Susan M Landau; Ming Lu; Abhinay D Joshi; Michael Pontecorvo; Mark A Mintun; John Q Trojanowski; Leslie M Shaw; William J Jagust Journal: Ann Neurol Date: 2013-12 Impact factor: 10.422