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Investigation of the Effect of Dietary Nitrate Treatment on Endothelial Function and Platelet Reactivity in Hypercholesterolemics.

NCT01493752 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 69

Last updated 2014-04-09

No results posted yet for this study

Summary

Diets rich in fruit and vegetables reduce the risk of strokes and heart attacks, however the exact cause of this beneficial effect is uncertain. Evidence suggests that certain vegetables, including beetroot and the green leafy vegetables, possess high inorganic nitrate concentrations. The investigators recent evidence suggests that inorganic nitrate provides a source of gas called nitric oxide in the body that exerts a number of beneficial effects upon the heart and blood vessels . The investigators have previously shown that beetroot juice ingestion improves blood vessel (vascular endothelial) and platelet function in healthy volunteers. Studies by the investigators show that these effects are due to conversion of nitrate to nitrite by symbiotic (helpful) bacteria (located on the tongue) and subsequent conversion of nitrite to nitric oxide in blood vessels. The investigators now wish to explore whether dietary nitrate, via its beneficial effects on platelets and blood vessels, might improve indices of atherosclerotic disease progression in high risk individuals (hypercholesterolemics). Recruits will have high cholesterol and no known atherosclerosis and will not yet be on any anti-cholesterol medications. Volunteers will consume a daily dose of beetroot juice or placebo nitrate-free juice for six weeks. Vascular function will be assessed using non-invasive techniques at the beginning and at the end of the study using ultrasound measurement of flow mediated dilatation (FMD) of the brachial artery in the arm and pulse wave analysis (PWA) and pulse wave velocity (PWV) to measure arterial compliance. To assess impact on platelet function, blood samples will also be taken at the start and at the end of the study.

Conditions

Interventions

DIETARY_SUPPLEMENT

beetroot juice

250mls daily beetroot juice

Sponsors & Collaborators

  • British Heart Foundation

    collaborator OTHER

  • Queen Mary University of London

    lead OTHER

Study Design

Allocation
RANDOMIZED
Masking
QUADRUPLE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2011-08-31
Primary Completion
2013-05-31
Completion
2013-05-31

Countries

  • United Kingdom

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01493752 on ClinicalTrials.gov