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Sökning: WFRF:(Kornhuber J) > Konferensbidrag

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  • Blennow, K., et al. (författare)
  • EVOLUTION OF A beta 42 AND A beta 40 LEVELS AND A beta 42/A beta 40 RATIO IN PLASMA DURING PROGRESSION OF ALZHEIMER'S DISEASE: A MULTICENTER ASSESSMENT
  • 2009
  • Ingår i: Journal Of Nutrition Health & Aging. - 1279-7707. ; 13:3, s. 205-208
  • Konferensbidrag (refereegranskat)abstract
    • Objective: To better understand the seemingly contradictory plasma beta-amyloid (A beta) results in Alzheimer's disease (AD) patients by using a newly developed plasma A beta assay, the INNO-BIA plasma A beta forms, in a multicenter study. Methods: A combined retrospective analysis of plasma A beta isoforms on mild cognitive impairment (MCI) from three large cross-sectional studies involving 643 samples from the participating German and Swedish centers. Results: Detection modules based on two different amino (N)-terminal specific A beta monoclonal antibodies demonstrated that A beta in plasma could be reliable quantified using a sandwich immunoassay technology with high precision, even for low A beta 42 plasma concentrations. A beta 40 and A beta 42 concentrations varied consistently with the ApoE genotype, while the A beta 42/A beta 40 ratio did not. Irrespective of the decrease of the A beta 42/A beta 40 ratio with age and MMSE, this parameter was strongly associated with AD, as defined in this study by elevated hyperphosphorylated (P-tau181P) levels in cerebrospinal fluid (CSF). Conclusion: A highly robust assay for repeatedly measuring A beta forms in plasma such as INNO-BIA plasma A beta forms might be a useful tool in a future risk assessment of AD.
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