As the population continues to age, the incidence of dementia is dramatically increasing, resulting in an urgent need to identify risk factors for abnormal brain aging and dementia. Alterations in cardiac function influence systemic blood flow, which impacts cerebral blood flow homeostasis as demonstrated by animal models. Such changes in cerebral blood flow homeostasis may pose a risk for accelerating age-related brain injury. Our preliminary research suggests that cardiac function is related to markers of maladaptive brain aging. It is not yet clear if cardiac function accelerates neuroimaging or cognitive markers of cerebrovascular or Alzheimer's disease among aging individuals with mild cognitive impairment (MCI). Individuals with MCI are at increased risk for cognitive progression and susceptible to more rapid abnormal brain aging when concomitant vascular disease is present. Our proposed study will examine relations between cardiac function and maladaptive brain aging and provide important information for developing novel strategies to delay the progression from MCI to dementia. Using a prospective observational matched design, we will cross-sectionally and longitudinally relate cardiac function to neuroimaging and cognitive markers of early Alzheimer's disease and cerebrovascular changes among aging adults with MCI and age-, sex-, and race-matched cognitively normal adults. Clinical or subclinical cardiac dysfunction may be due to complex systemic mechanisms that are preventable or treatable, such as enhanced inflammatory markers and insulin resistance, or genetic factors, such as apolipoprotein E. Therefore, we will consider systemic and genetic factors as potential mediating mechanisms in relations between cardiac function and brain aging. The proposed study leverages an existing Alzheimer's Association funded study directed by the principal investigator, the participant registry of our NIA-funded Boston University Alzheimer's Disease Center, a recent American Recovery &Reinvestment Act supplement grant focused on African American recruitment and retention, and the unique resources afforded by our local Clinical and Translational Science Institute housing the General Clinical Research Unit.

Public Health Relevance

The incidence of dementia is dramatically increasing, and in the absence of effective therapies, there is an urgent need to identify risk factors and prevention strategies. Our preliminary data suggest cardiac function may be an unrecognized risk factor for maladaptive brain aging. The proposed project will generate evidence to support the development of novel strategies for delaying dementia onset and progression.

National Institute of Health (NIH)
National Institute on Aging (NIA)
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Silverberg, Nina B
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Vanderbilt University Medical Center
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Jefferson, Angela L; Cambronero, Francis E; Liu, Dandan et al. (2018) Higher Aortic Stiffness Is Related to Lower Cerebral Blood Flow and Preserved Cerebrovascular Reactivity in Older Adults. Circulation 138:1951-1962
Gifford, Katherine A; Liu, Dandan; Neal, Jacquelyn E et al. (2018) Validity and Normative Data for the Biber Figure Learning Test: A Visual Supraspan Memory Measure. Assessment :1073191118773870
Deming, Yuetiva; Dumitrescu, Logan; Barnes, Lisa L et al. (2018) Sex-specific genetic predictors of Alzheimer's disease biomarkers. Acta Neuropathol 136:857-872
Cambronero, Francis E; Liu, Dandan; Neal, Jacquelyn E et al. (2018) APOE genotype modifies the association between central arterial stiffening and cognition in older adults. Neurobiol Aging 67:120-127
Moore, Elizabeth E; Hohman, Timothy J; Badami, Faizan S et al. (2018) Neurofilament relates to white matter microstructure in older adults. Neurobiol Aging 70:233-241
Osborn, Katie E; Liu, Dandan; Samuels, Lauren R et al. (2018) Cerebrospinal fluid ?-amyloid42 and neurofilament light relate to white matter hyperintensities. Neurobiol Aging 68:18-25
Hohman, Timothy J; Dumitrescu, Logan; Cox, Nancy J et al. (2017) Genetic resilience to amyloid related cognitive decline. Brain Imaging Behav 11:401-409
Lane, Elizabeth M; Hohman, Timothy J; Jefferson, Angela L et al. (2017) Insulin-like growth factor binding protein-2 interactions with Alzheimer's disease biomarkers. Brain Imaging Behav 11:1779-1786
Bell, S P; Liu, D; Samuels, L R et al. (2017) Late-Life Body Mass Index, Rapid Weight Loss, Apolipoprotein E ?4 and the Risk of Cognitive Decline and Incident Dementia. J Nutr Health Aging 21:1259-1267
Jefferson, Angela L; Gifford, Katherine A; Acosta, Lealani Mae Y et al. (2016) The Vanderbilt Memory & Aging Project: Study Design and Baseline Cohort Overview. J Alzheimers Dis 52:539-59

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