Alzheimer Disease Clinical Trial
Official title:
Amyloid Brain Positron Emission Tomography (PET) Imaging With 11C-PIB and Tau PET Imaging With 18F-MK-6240 in the Diabetes Prevention Program Outcomes Study.
This is a cross-sectional pilot study of Alzheimer's disease (AD) brain imaging biomarkers in Diabetes Prevention Program (DPP) outcomes study (DPPOS) participants from the New York City sites (Columbia and Einstein), comparing 10 persons originally randomized to metformin and 10 persons randomized to placebo in DPP. All study procedures will be conducted at Columbia University Irving Medical Center. Eligible participants will receive a PET scans and a brain MRI, which may be conducted in one, two, or three separate visits.
Hyperinsulinemia is believed to increase the risk of Alzheimer's dementia through both cerebrovascular and A related mechanisms, and this hypothesis has prompted testing strategies related to hyperinsulinemia and diabetes in the prevention and treatment of Alzheimer's dementia.These strategies usually entail improving insulin sensitivity to lower insulin and glucose levels, such as lifestyle (diet and exercise) and metformin, which were effective strategies for preventing diabetes in the DPPOS. There are conflicting data relating metformin with increased AD risk, and this needs to be clarified in DPPOS. Several laboratory and human studies have suggested that metformin increases the risk of Alzheimer's dementia, but this is countered by other studies indicating that it is beneficial. Preliminary data in humans and animals support the beneficial effects of metformin on Alzheimer's dementia risk. ;
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