Journal
JOURNAL OF THE NEUROLOGICAL SCIENCES
Volume 319, Issue 1-2, Pages 124-129Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jns.2012.04.014
Keywords
Dementia; Cerebral hypoperfusion; Amyloid plaque; [F-18]AV-45 positron emission tomography; Carotid artery stenosis; Stroke
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Funding
- Chang Gung Memorial Hospital, Taiwan [CMRP370891, CMRPG380701, CMRPG290092]
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Animal studies have shown that cerebral hypoperfusion may be associated with amyloid plaque accumulation. Amyloid plaque is known to be associated with dementia and [F-18]AV-45 is a positron emission tomography (PET) ligand that binds to extracelluar plaques. We hypothesized that demented patients with cerebral hypoperfusion may have increased [F-18]AV-45 uptake. Five demented patients with cerebral hypoperfusion due to unilateral carotid artery stenosis (CAS) were examined with [F-18]AV-45 PET, and the results were compared with six elderly controls. The standard uptake value ratio (SUVR) of each region of interest (ROI) was created using whole cerebellum as the reference region. All subjects underwent magnetic resonance imaging (MRI) for obtaining structural information. Patients with dementia and unilateral CAS had a higher global [F-18]AV-45 SUVR (1.34 +/- 0.06) as compared with controls (1.10 +/- 0.04, p = 0.0043), especially over the frontal, temporal, precuneus, anterior cingulate and occipital regions. The statistical distribution maps revealed a significantly increased [F-18]AV-45 SUVR in the medial frontal, caudate, thalamus, posterior cingulate, occipital and middle and superior temporal regions ipsilateral to the side of CAS (p<0.01). The present study found that cerebral [F-18]AV-45 binding is increased in demented patients with CAS, and its distribution is lateralized to the CAS side, suggesting that amyloid-related dementia may occur under cerebral hypoperfusion. (C) 2012 Elsevier B.V. All rights reserved.
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