Relation of Diet to Heart Disease Risk Factors in Children

March 25, 2015 updated by: UCSF Benioff Children's Hospital Oakland
Metabolites of dietary phosphatidylcholine- choline and trimethylamine N-oxide (TMAO)- were recently identified as being associated with myocardial infarction in a case-control study. The latter TMAO is a gut-microflora-derived choline metabolite that has been shown to be a potent risk factor for cardiovascular disease (CVD). This pilot study seeks to use information derived from a dietary questionnaire in children to test the association of dietary choline intake to plasma levels of TMAO as well as the relationship between plasma choline levels and components of atherogenic dyslipidemia (increased triglycerides and small LDL, and reduced HDL cholesterol). An ancillary goal of this study is to build on existing programs of community outreach to local Oakland/Berkeley minority communities, and to develop an infrastructure for family-based and community participation in clinical research across the full age spectrum and among diverse populations. This pilot study will examine the association of dietary choline intake assessed by food frequency questionnaires to biomarkers of CVD risk in 40 children (> 7 years of age) and their parents as there is no information regarding this relationship in children. The results of this pilot study will form the basis for a proposal to carry out a randomized intervention trial to directly test the effects of dietary choline intake on plasma TMAO and lipoprotein levels. Ultimately, better understanding of the relationship between dietary choline intake and CVD risk factors may facilitate the formulation of appropriate dietary choline recommendations in children and adults.

Study Overview

Status

Completed

Conditions

Detailed Description

From interested participants (children and parents) we will obtain:

  1. Informed consent
  2. Anthropometric measurements - height, weight, waist and hip circumference, blood pressure, % body fat by bioimpedance (Tanita scale).
  3. Health History Questionnaire
  4. Food Frequency Questionnaire
  5. Fasting blood sample- We will collect a total of 40 ml of blood (less than 3 ml/kg for the entire study). The blood samples will be used to measure triglyceride, LDL-cholesterol, HDL-cholesterol, glucose, insulin, apoA1, apoB, C-reactive protein, lipoprotein subfraction analysis by ion mobility, DNA for inclusion in our DNA biobank, choline, TMAO and other metabolites related to heart disease risk.

Standard Blood sampling: Using standard blood collection procedures, blood samples will be collected from participants after a 12-14 hour fast. The blood will be collected in tubes containing the following preservative solution: 3.0 gms EDTA (dipotassium), 1.7 mg P-Pack, 0.15 gms gentamycin sulfate, 0.15 gms chloramphenicol, 5.96 mls aprotinin (Sigma A-6279), and 0.30 gms sodium azide all of which are diluted to 20mls with doubly deionized water. Plasma is separated by immediate centrifugation at 4°C. Lipid and lipoprotein measurements are performed and aliquots of plasma are frozen for future analyses.

Study Type

Observational

Enrollment (Actual)

92

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Oakland, California, United States, 94609
        • Children's Hospital & Research Center Oakland

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

7 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

The study population will consist of children (>7 years of age) and their parents who are generally healthy. Parents are not required to participant in the study. We will include all ethnicities.

Description

Inclusion Criteria:

  • Children >7 years of age and their parents

Exclusion Criteria:

  • Antibiotics
  • Pregnant or breastfeeding women

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Trimethylamine N-oxide (TMAO)
Time Frame: 1 time
1 time

Secondary Outcome Measures

Outcome Measure
Time Frame
Choline
Time Frame: 1 time
1 time
LDL subfractions
Time Frame: 1 time
1 time
HDL cholesterol
Time Frame: 1 time
1 time
Triglycerides
Time Frame: 1 time
1 time

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

UCSF Benioff Children's Hospital Oakland

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2011

Primary Completion (Actual)

April 1, 2012

Study Completion (Actual)

July 1, 2013

Study Registration Dates

First Submitted

August 15, 2011

First Submitted That Met QC Criteria

August 15, 2011

First Posted (Estimate)

August 17, 2011

Study Record Updates

Last Update Posted (Estimate)

March 26, 2015

Last Update Submitted That Met QC Criteria

March 25, 2015

Last Verified

March 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MM-3462

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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