Cardiovascular disease is the leading cause of death for Americans, and advancing age confers major risk despite control of traditional risk factors. Age-related increases in vascular arterial stiffness and endothelial dysfunction precede clinical disease and are early independent predictors of atherosclerosis, hypertension, and cardiovascular events. Interactions between these age-related increases and other lifestyle risk factors likely exacerbate vascular aging and cardiovascular disease development. Habitual diet is a lifestyle factor that influences cardiovascular risk, and numerous studies have reported that foods and dietary patterns affect arterial stiffness and endothelial dysfunction. However, the extent to which habitual diet moderates the effect of age on these measures of vascular health is unknown.
The aim of this research is to examine the effect of diet quality, as defined by public health recommendations, on arterial stiffness and endothelial dysfunction in a large cross-sectional sample of adults from the Framingham Heart Study. We will also investigate whether diet quality moderates the effect of age on vascular health. Arterial stiffness, endothelial dysfunction, and habitual diet were previously assessed in approximately 7000 participants of the Framingham Offspring Cohort and the Third Generation Cohort. Carotid-femoral pulse wave velocity and brachial flow-mediated dilation were used to index arterial stiffness and endothelial dysfunction, respectively. Habitual diet was determined via food frequency questionnaires, and diet quality will be quantified using the Dietary Guidelines Adherence Index. Multiple regression will be used to evaluate the association between diet quality and the age-diet quality interaction with arterial stiffness and endothelial dysfunction, independent of potential clinical confounds (e.g. sex, body mass index, blood pressure, smoking, other medical conditions). Exploratory analyses will seek to determine which components of the Dietary Guidelines are associated with the greatest protection from age- related arterial stiffness and endothelial dysfunction. The findings from the current proposal may suggest a link between diet quality, arterial stiffness, and endothelial dysfunction, and as such will be useful for designing interventions to treat or prevent age-related vascular decline.

Public Health Relevance

Cardiovascular disease is the leading cause of death for Americans, and age-related vascular decline is an independent predictor of cardiovascular events. There is evidence that foods or dietary patterns can affect vascular measures of arterial stiffness and endothelial dysfunction;however, the influence of habitual diet quality, as defined by public health recommendations, is unknown. This research will examine how diet quality affects age-related arterial stiffness and endothelial dysfunction, and will seek to identify a potential intervention to slow or reverse age-related increases in cardiovascular risk.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Predoctoral Individual National Research Service Award (F31)
Project #
1F31AG043224-01
Application #
8395994
Study Section
Special Emphasis Panel (ZRG1-F16-B (20))
Program Officer
Zieman, Susan
Project Start
2012-08-01
Project End
2014-07-31
Budget Start
2012-08-01
Budget End
2013-07-31
Support Year
1
Fiscal Year
2012
Total Cost
$38,221
Indirect Cost
Name
Pennsylvania State University
Department
Psychology
Type
Schools of Allied Health Profes
DUNS #
003403953
City
University Park
State
PA
Country
United States
Zip Code
16802
Sauder, Katherine A; Pokorney, Paige E; McCrea, Cindy E et al. (2015) Noninvasive assessment of hemodynamics: a comparative analysis of fingertip pulse contour analysis and impedance cardiography. Blood Press Monit 20:209-14
Sauder, Katherine A; Proctor, David N; Chow, Mosuk et al. (2015) Endothelial function, arterial stiffness and adherence to the 2010 Dietary Guidelines for Americans: a cross-sectional analysis. Br J Nutr 113:1773-81
Sauder, Katherine A; McCrea, Cindy E; Ulbrecht, Jan S et al. (2015) Effects of pistachios on the lipid/lipoprotein profile, glycemic control, inflammation, and endothelial function in type 2 diabetes: A randomized trial. Metabolism 64:1521-9
Sauder, Katherine A; West, Sheila G; McCrea, Cindy E et al. (2014) Test-retest reliability of peripheral arterial tonometry in the metabolic syndrome. Diab Vasc Dis Res 11:201-7
Sauder, Katherine A; McCrea, Cindy E; Ulbrecht, Jan S et al. (2014) Pistachio nut consumption modifies systemic hemodynamics, increases heart rate variability, and reduces ambulatory blood pressure in well-controlled type 2 diabetes: a randomized trial. J Am Heart Assoc 3:
Sauder, Katherine A; Skulas-Ray, Ann C; Campbell, Tavis S et al. (2013) Effects of omega-3 fatty acid supplementation on heart rate variability at rest and during acute stress in adults with moderate hypertriglyceridemia. Psychosom Med 75:382-9