A lzheim er’s D isease Prevention Initiative No Disease, No Symptoms Early Brain Changes, No Symptoms Mild Memory Loss Mild, Moderate and Severe Impairment Disease Progression Disease Progression Mild Cognitive Impairment Pre- symptomatic AD Norm al AD Prim ary Prevention Secondary Prevention Treatment
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Risk of Developing Alzheimer’s Disease in Persons with MCI Survival curve of persons characterized as having a mild cognitive impairment for 6 years.
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Alzheimer’s Disease Prevention Initiative
No Disease,No Symptoms
Early BrainChanges,
No Symptoms
Mild MemoryLoss
Mild, Moderate and Severe Impairment
Disease ProgressionDisease Progression
Mild Cognitive
Impairment
Pre-symptomatic
ADNormal AD
PrimaryPrevention
SecondaryPrevention Treatment
Risk of Developing Alzheimer’s Disease in Persons with MCI
Survival curve of persons characterized as having a mild cognitive impairment for 6 years. Approximately 80% have converted to dementia during this time.
Peterson RC, et al., Arch Neurol. 58:1985-1992, 2001.
Normal, 75 years old
Alzheimer’s disease, 75 years old
Volume of Hippocampus and Rate of Shrinkage Predicts Crossover from MCI to AD
Percent Annual Decline in Hippocampal Volume
0
0.5
1
1.5
2
2.5
3
3.5
4
Control MCI AD
StableDecliner
Jack CR, et al, Neurology 55: 484-489, 2000De Leon MJ, 1999
PET Imaging of Amyloid Deposits in Alzheimer’s Disease vs Normal Controls
Source: Klunk, et al. Ann Neurol 2004: 55:306-319.
PET imaging with a novel tracer, Pittsburgh Compound-B (PIB), can provide quantitative information on amyloid deposits in living subjects.
Current Drug Treatments for AD
• Acetylcholinesterase inhibitors for mild to moderate AD− Tacrine (Cognex)− Denepezil (Aricept)− Rivastigmine (Exelon)− Galantamine (Reminyl)
• Neuroprotective agent for moderate to severe AD− Memantine (Namenda)
Funded AD Prevention and Selected Treatment Trials