Abstract:
OBJECTIVE:To determine whether the Alzheimer's disease dementia conversion-related pattern (ADCRP) on [18F]FDG PET can serve as a valid predictor for the development of Alzheimer's disease dementia, the individual expression of the ADCRP (subject score) and its prognostic value were examined in subjects with mild cognitive impairment and biologically defined Alzheimer's disease. METHODS:269 subjects with available [18F]FDG PET, [18F]AV-45 PET, phosphorylated and total tau in CSF, and neurofilament light chain in plasma were included. Following the AT(N) classification scheme, where Alzheimer's disease is defined biologically by in vivo biomarkers of Aβ deposition ("A") and pathological tau ("T"), subjects were categorized to the A-T-, A+T-, A+T+ (Alzheimer's disease), and A-T+ groups. RESULTS:The mean subject score of the ADCRP was significantly higher in the A+T+ group compared to each of the other group (all p < 0.05) but was similar among the latter (all p > 0.1). Within the A+T+ group, the subject score of ADCRP was a significant predictor of conversion to dementia (HR = 2.02 per z-score increase, p < 0.001), with higher predictive value than of alternative biomarkers of neurodegeneration (total tau and neurofilament light chain). Stratification of A+T+ subjects by the subject score of ADCRP yielded well-separated groups of high, medium, and low conversion risks. CONCLUSIONS:The ADCRP is a valuable biomarker of neurodegeneration in subjects with mild cognitive impairment and biologically defined Alzheimer's disease. It shows great potential for stratifying the risk and estimating the time to conversion to dementia in subjects with mild cognitive impairment and underlying Alzheimer's disease (A+T+). CLASSIFICATION OF EVIDENCE:This study provides Class I evidence that [18F]FDG PET predicts the development of AD dementia in individuals with MCI and underlying AD as defined by the AT(N) framework.
journal_name
Neurologyjournal_title
Neurologyauthors
Blazhenets G,Frings L,Ma Y,Sörensen A,Eidelberg D,Wiltfang J,Meyer PT,Alzheimer’s Disease Neuroimaging Initiative.doi
10.1212/WNL.0000000000011521subject
Has Abstractpub_date
2021-01-06 00:00:00eissn
0028-3878issn
1526-632Xpii
WNL.0000000000011521pub_type
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