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Comparing Biological Markers Of Alzheimer's Disease Across Blood Fraction And Platforms: Comparing Apples To Oranges, Sid E. O'Bryant, Simone Lista, Robert A. Rissman, Melissa Edwards, Fan Zhang, James Hall, Herik Zetterberg, Simon Lovestone, Veer Bular Gupta, Neill Graff-Radford, Ralph N. Martins, Andreas Jeromin, Stephen Waring, Esther Oh, Mitchel Kling, Laura D. Baker, Harald Hampel
Comparing Biological Markers Of Alzheimer's Disease Across Blood Fraction And Platforms: Comparing Apples To Oranges, Sid E. O'Bryant, Simone Lista, Robert A. Rissman, Melissa Edwards, Fan Zhang, James Hall, Herik Zetterberg, Simon Lovestone, Veer Bular Gupta, Neill Graff-Radford, Ralph N. Martins, Andreas Jeromin, Stephen Waring, Esther Oh, Mitchel Kling, Laura D. Baker, Harald Hampel
Research outputs 2014 to 2021
Introduction:
This study investigated the comparability of potential Alzheimer's disease (AD) biomarkers across blood fractions and assay platforms.
Methods:
Nonfasting serum and plasma samples from 300 participants (150 AD patients and 150 controls) were analyzed. Proteomic markers were obtained via electrochemiluminescence or Luminex technology. Comparisons were conducted via Pearson correlations. The relative importance of proteins within an AD diagnostic profile was examined using random forest importance plots.
Results:
On the Meso Scale Discovery multiplex platform, 10 of the 21 markers shared > 50% of the variance across blood fractions (serum amyloid A R2 = 0.99, interleukin (IL)10 R2 = 0.95, fatty …