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Clinical severity of Alzheimer's disease is associated with PIB uptake in PET

  • Technical University of Munich
  • W. Psychiatric Institute and Clinic
  • University of Pittsburgh School of Medicine

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

Background: The positron emission tomography (PET) tracer [11C]-Pittsburgh Compound-B ([11C]PIB) allows the in vivo assessment of amyloid plaque burden in the brain. In a cross-sectional study we examined the association between the severity of dementia assessed using the Clinical Dementia Rating scale sum of boxes (CDR-SOB) and [11C]PIB-PET in patients with Alzheimer's disease (AD). Methods: Patients with probable AD who had an AD-typical [18F]FDG-PET scan were included. Linear regression analysis in anatomically defined regions-of-interest (ROIs) and correlation analysis using statistical parametric mapping (SPM) were used to determine the association between CDR-SOB and [11C]PIB uptake. Results: The linear regression analyses showed that the CDR-SOB explained approximately 11-22% of the variance of [11C]PIB uptake. The association attained statistical significance in both frontal, in both anterior cingulate cortices, and in both putamina. The SPM analysis showed a significant association in more widespread regions of the brain, with maxima located in similar areas as in the ROI-analysis. Conclusion: The CDR-SOB score is significantly associated with [11C]PIB uptake in patients with AD. Thus [11C]PIB is a potential surrogate marker of dementia severity.

Original languageEnglish
Pages (from-to)1902-1909
Number of pages8
JournalNeurobiology of Aging
Volume30
Issue number12
DOIs
StatePublished - Dec 2009

Keywords

  • Alzheimer's disease
  • Amyloid plaques
  • Clinical Dementia Rating
  • Dementia
  • Imaging
  • Pittsburgh Compound B
  • Positron emission tomography
  • [11C]PIB
  • [18F]FDG

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