P1–257: Cerebral glucose metabolism, pathology and behaviour in the 5XFAD mouse model of Alzheimer's disease

Macdonald, Ian R.; DeBay, Drew R.; Reid, Allison; Cash, Meghan K.; Jollymore, Courtney; Mawko, George; Burrell, Steve; Martin, Earl; Bowen, Chris R.; Brown, Richard; Darvesh, Sultan

doi:10.1016/j.jalz.2013.05.482

Cited by 1 publication

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“…The present cross sectional study examines both brain 18 FDG uptake and plaque deposition in 5XFAD mice at 2, 5 and 13 months of age, relative to controls. Portions of this work have been presented in abstract form [21]. …”

Section: Introductionmentioning

confidence: 99%

Early Detection of Cerebral Glucose Uptake Changes in the 5XFAD Mouse

Macdonald¹,

DeBay²,

Reid³

et al. 2014

CAR

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Brain glucose hypometabolism has been observed in Alzheimer’s disease (AD) patients, and is detected with 18F radiolabelled glucose, using positron emission tomography. A pathological hallmark of AD is deposition of brain β-amyloid plaques that may influence cerebral glucose metabolism. The five times familial AD (5XFAD) mouse is a model of brain amyloidosis exhibiting AD-like phenotypes. This study examines brain β-amyloid plaque deposition and 18FDG uptake, to search for an early biomarker distinguishing 5XFAD from wild-type mice. Thus, brain 18FDG uptake and plaque deposition was studied in these mice at age 2, 5 and 13 months. The 5XFAD mice demonstrated significantly reduced brain 18FDG uptake at 13 months relative to wild-type controls but not in younger mice, despite substantial β-amyloid plaque deposition. However, by comparing the ratio of uptake values for glucose in different regions in the same brain, 5XFAD mice could be distinguished from controls at age 2 months. This method of measuring altered glucose metabolism may represent an early biomarker for the progression of amyloid deposition in the brain. We conclude that brain 18FDG uptake can be a sensitive biomarker for early detection of abnormal metabolism in the 5XFAD mouse when alternative relative uptake values are utilized.

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Section: Introductionmentioning

confidence: 99%