The main objective of this study is to determine if omega 3 polyunsaturated fatty acids (pufas) can slow the accumulation of brain MRI derived white matter hyperintensities (WMH) over 3 years in a population at risk for dementia by advanced age, evidence of WMH and lower pufa status. This pilot trial is designed to collect preliminary data on pufa effects on total WMH progression, plasma biomarkers of endothelial function and rate of cognitive change over time. The study is a randomized, double-blind, placebo-controlled trial. Non- demented elders age 80 and older with WMH burden and lower plasma pufas will be enrolled. One hundred and fifty subjects will be randomized, half to pufa supplementation, and half to placebo over a 3 year term.
Aim 1 will assess the effects of this nutritional therapy on WMH progression. Our hypothesis is that those randomized to pufas will appreciate less WMH progression.
Aim 2 will assess the pufa effects on biomarkers of endothelial function as a potential modulator of the effects on total WMH and cognitive change. We hypothesize that pufas improve biomarkers of endothelial function.
Aim 3 will collect preliminary data on the change in executive function and processing skills to inform the more definitive prevention trials in the future. We hypothesize that pufas slow vascular pathology mediated cognitive aging.

Public Health Relevance

This study will evaluate the ability of a fish oil extract in preventing vascular related risk factors for mental and thinking ability decline in a non-demented cohort of older adults. Because there are no current therapies that prevent age-related cognitive decline, including Alzheimer's disease and more vascular mediated cognitive impairment, it is imperative to scientifically evaluate this therapy as a promising preventative strategy to promote healthy cognitive aging.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
1R01AG043398-01A1
Application #
8579391
Study Section
Special Emphasis Panel (ZRG1-BBBP-V (55))
Program Officer
Wagster, Molly V
Project Start
2013-09-01
Project End
2018-05-31
Budget Start
2013-09-01
Budget End
2014-05-31
Support Year
1
Fiscal Year
2013
Total Cost
$578,501
Indirect Cost
$168,511
Name
Oregon Health and Science University
Department
Neurology
Type
Schools of Medicine
DUNS #
096997515
City
Portland
State
OR
Country
United States
Zip Code
97239
Harrison, Fiona E; Bowman, Gene L; Polidori, Maria Cristina (2014) Ascorbic acid and the brain: rationale for the use against cognitive decline. Nutrients 6:1752-81