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Treatment for Alzheimer's Disease (MITNEC C6 Trial)
Summary
The prevalence of both Alzheimer's Disease (AD) and stroke doubles each decade over 65 years old. Both are major causes of dementia, currently estimated to affect 46 million people worldwide. The current costs globally are $818 billion. Additionally, in population studies elders over 65 years, "covert" cerebral small vessel disease appears on MRI scans as silent lacunar infarcts in 25% as Microbleeds in 10%, and as focal or diffuse 'incidental' white matter disease (WMD) in 95%. WMD is extensive in 20%, with a clinical threshold effect around 10cc2. Small vessel disease is even more common in dementia, often coexisting with AD and independently contributing to cognitive decline and progression to dementia. Longitudinal imaging using cerebral amyloid labeling opens a new opportunity to understand the additive/interactive effects of small vessel disease and AD. The design of this study includes recruitment of two cohorts, including Mild Cognitive Impairment (MCI) and/or early Alzheimer Disease subjects from memory clinics and subjects with strokes/TIA from stroke prevention clinics. Inclusion criteria include the presence of moderate/extensive white matter disease, eg. Fazekas score of 2 (with confluent peri-ventricular hyperintensities) or Fazekas score of 3, as determined by previous MR or CT, \> 60 years of age, Mini-Mental Status Exam (MMSE) scores ≥ 20. Subjects will undergo 3T structural MRI (including T1, PD/T2, FLAIR, GRE, DTI, ASL, and resting state fMRI), glucose PET, amyloid PET (using AV-45 florbetapir) and neuropsychological testing, as well as blood sampling. Repeat MR and PET/CT imaging and neuropsychological testing will be conducted at 24 months. The follow up assessments can also be completed at either year 1 or year 3 or Year 4 depending on the availability of study participants. The imaging portion is designed to closely parallel the Alzheimer's Disease Neuroimaging Initiative (ADNI) in order to benefit from the availability of both cognitively normal controls (NC), MCI and Alzheimer's disease subjects with minimal WMD.
- Alzheimer's Disease
- Small Vessel Disease White Matter Hyperintensities
- Vascular Cognitive Impairment
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