Vitamin D may help reduce the risk of cardiovascular and other chronic diseases. Large clinical trials are currently underway to formally determine whether vitamin D treatment will lower the risks of cardiovascular diseases, fractures, and cancer. Pending results of clinical trials, laboratory testing and treatment for vitamin D deficieny have become widespread in clinical practice. Limited data are available regarding which individuals are most likely to respond to vitamin D treatment, hindering clinical evaluation and limiting interpretation of ongoing trials. The goal of this application is to identify individual-lvel characteristics (genetic and biomarker) that inform the biologic response to vitamin D treatment. To accomplish the goal we will randomly assign 1,600 participants from the Multi-Ethnic Study of Atherosclerosis to 16-weeks of vitamin D3 (2000 IU daily) or matching placebo in a 3:1 ratio. We will determine whether the biological effects of vitamin D3 treatment are modified by genetic polymorphisms in vitamin D metabolic pathways and/or by novel biochemical measures of baseline vitamin D status. Findings from the studies proposed in this application could augment the interpretation of ongoing vitamin D clinical trials and catalyze a precision medicine approach aimed at maximizing the benefits of vitamin D therapy while potentially reducing harm and substantially decreasing costs.

Public Health Relevance

Vitamin D may help reduce the risk of cardiovascular and other chronic diseases. In this application we propose to conduct a vitamin D3 intervention study designed to identify individual-level characteristics that inform the biologic response to vitamin D treatment. Results could guide interpretation of ongoing vitamin D trials and catalyze a precision medicine approach aimed at maximizing the benefits of vitamin D therapy.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL096875-08
Application #
9701852
Study Section
Kidney, Nutrition, Obesity and Diabetes Study Section (KNOD)
Program Officer
Jaquish, Cashell E
Project Start
2010-06-01
Project End
2020-06-30
Budget Start
2019-07-01
Budget End
2020-06-30
Support Year
8
Fiscal Year
2019
Total Cost
Indirect Cost
Name
University of Washington
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
605799469
City
Seattle
State
WA
Country
United States
Zip Code
98195
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