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Pittsburgh compound B binding in poststroke dementia.

Vincent Mok1, Eric Yim Lung Leung, Winnie Chu

  • 1Department of Medicine and Therapeutics, The Chinese University of Hong Kong, China. vctmok@cuhk.edu.hk

Journal of the Neurological Sciences
|January 9, 2010
PubMed
Summary
This summary is machine-generated.

Pittsburgh compound B (PIB) is common in poststroke dementia (PSD), with PIB-positive patients showing faster cognitive decline. This pilot study found PIB positron emission tomography (PET) feasible for evaluating PSD.

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Area of Science:

  • Neurology
  • Nuclear Medicine
  • Neuroimaging

Background:

  • Poststroke dementia (PSD) is a significant cause of cognitive impairment.
  • The role of amyloid-beta deposition, detectable by Pittsburgh compound B (PIB) positron emission tomography (PET), in PSD is not well understood.
  • Understanding PIB binding in PSD is crucial for differentiating it from other dementia types like Alzheimer's disease (AD).

Purpose of the Study:

  • To investigate the prevalence of PIB binding in patients with poststroke dementia (PSD).
  • To assess whether PIB positivity is associated with a faster rate of cognitive decline in PSD.
  • To evaluate the feasibility of using PIB PET for PSD assessment.

Main Methods:

  • PIB PET imaging was performed on 17 subjects, including 10 PSD patients, 4 AD patients, and 3 healthy controls.
  • Mini-Mental State Examination (MMSE) scores were tracked to compare cognitive decline rates.
  • Comparison of MMSE change between PIB-positive and PIB-negative PSD patients.

Main Results:

  • AD-like PIB binding was detected in 40% of PSD patients, similar to AD patients.
  • PIB-positive PSD patients exhibited a higher global PIB retention standardized uptake value (SUV) compared to PIB-negative PSD patients.
  • Mean annual MMSE decline was 2.9 for PIB-positive PSD patients versus 1.0 for PIB-negative PSD patients.

Conclusions:

  • PIB binding appears to be common in PSD, suggesting amyloid pathology may contribute to cognitive decline in these patients.
  • PIB PET imaging is a feasible method for evaluating PSD.
  • Further research is needed to confirm if PIB binding is linked to more rapid cognitive decline in PSD.