Asymptomatic Alzheimer's Disease: A Prodrome or a State of Resilience?
Abstract:Neuritic plaques and neurofibrillary tangles, the neuropathological hallmarks of AD, are not limited to individuals with dementia. These pathologic changes can also be present in the brains of cognitively normal older adults - a condition we defined as Asymptomatic AD (ASYMAD). Although it remains unclear whether these individuals would remain clinically normal with longer survival, they seem to be able to compensate for or delay the appearance of dementia symptoms. Here, we provide a historical background and highlight the combined clinical, pathologic and morphometric evidence related to ASYMAD. Understanding the nature of changes during this apparently asymptomatic state may shed light on the mechanisms that forestall the progression of the disease and allow for maintenance of cognitive health, an important area of research that has been understudied relative to the identification of risks and pathways to negative health outcomes.
Keywords: AD; Hypertrophy; MCI; Normal aging; asymptomatic AD; autopsy series; beta-amyloid; cerebral regions; dopaminergic nigral neurons; neuronal hypertrophy; neuropathology; ventromedial mesencephalic tegmentum
Document Type: Research Article
Publication date: 2011-06-01
- Current Alzheimer Research publishes peer-reviewed frontier review and research articles on all areas of Alzheimer's disease. This multidisciplinary journal will help in understanding the neurobiology, genetics, pathogenesis, and treatment strategies of Alzheimer's disease. The journal publishes objective reviews written by experts and leaders actively engaged in research using cellular, molecular, and animal models. The journal also covers original articles on recent research in fast emerging areas of molecular diagnostics, brain imaging, drug development and discovery, and clinical aspects of Alzheimer's disease. Manuscripts are encouraged that relate to the synergistic mechanism of Alzheimer's disease with other dementia and neurodegenerative disorders. Book reviews, meeting reports and letters-to-the-editor are also published. The journal is essential reading for researchers, educators and physicians with interest in age-related dementia and Alzheimer's disease. Current Alzheimer Research provides a comprehensive 'bird's-eye view' of the current state of Alzheimer's research for neuroscientists, clinicians, health science planners, granting, caregivers and families of this devastating disease.