A to Z Study Follow-up: Collection of DNA Data From Buccal Swabs

March 19, 2009 updated by: Interleukin Genetics, Inc.
The goal of this study is to determine the association between genotypes and diet. The weight and weight loss data are already available from the previously completed study called: A to Z Study - Benefits and Risks of Alternative Weight Loss Strategies - A Clinical Trial, which was performed from 2003-2005 at Stanford University. In the present study, Interleukin Genetics will obtain DNA samples from the previously enrolled study subjects to investigate genetic influence of the response to macronutrient compositions of low caloric diets to weight loss.

Study Overview

Status

Unknown

Conditions

Detailed Description

Interleukin Genetics has derived, through an extensive search of the scientific literature, a genetic test panel in the area of Weight Management (WM), which includes the genes that have been shown to affect body weight. These genes have been associated with elevated risk for obesity.

Study Type

Observational

Enrollment (Anticipated)

150

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
      • Stanford, California, United States, 94305-5401
        • Stanford University

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

25 years to 50 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Sampling Method

Probability Sample

Study Population

The study population for the A to Z study are premenopausal women who are overweight (BMI 27-40 kg/m2) but in otherwise good general health. Overweight participants with potentially confounding health conditions are excluded (eg., hypertension, diabetes, heart disease, cancer). Children were not included in this study. The participants were asked to agree to a random assignment to dietary plans.

Description

Inclusion Criteria:

  • BMI (body mass index): 27-40 kg/m2
  • Gender: Women only
  • Age: 25-50
  • Menopausal status: pre-menopausal
  • Weight stable for last 2-months
  • Not on a weight loss plan
  • No ethnic restrictions
  • No plans to move from the area over the next 6-months
  • Willing to accept random assignment
  • Possess English speaking and reading skills to understand and complete forms such as informed consent and study evaluation

Exclusion Criteria:

  • Hypertension
  • Diabetes (type 1 or 2) or history of gestational diabetes
  • Heart disease diagnosis
  • Renal or lever disease
  • Active neoplasms
  • Pregnant, lactating, within 6-months of birth, or planning to become pregnant in the next 6-months
  • Hyperthyroidism, unless treated and under control
  • Medications known to affect weight / energy expenditure
  • Excessive alcohol intake (self-reported, > 3 drinks/day)
  • Postmenopausal, including surgical menopause
  • Currently under psychiatric care, or severely clinically depressed (>17 on Beck Inventory)

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

Cohorts and Interventions

Group / Cohort
1
Previously enrolled subjects in the "Benefits and Risks of Alternative Weight Loss Strategies - a Clinical Trial", which was run at Stanford 2003-2005. (A to Z Study)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
The PRIMARY objective of this study is to identify genotype-diet interaction on weight, body fat, and BMI.
Time Frame: 1 year
1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
The SECONDARY objective is to explore the association of single nucleotide polymorphisms (SNPs) with other metabolic parameters, such as blood lipid profile, insulin level, and other cardiovascular risk factors.
Time Frame: 1 year
1 year

Collaborators and Investigators

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

Sponsor

Interleukin Genetics, Inc.

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

August 1, 2008

Primary Completion (Anticipated)

June 1, 2009

Study Completion (Anticipated)

September 1, 2009

Study Registration Dates

First Submitted

March 19, 2009

First Submitted That Met QC Criteria

March 19, 2009

First Posted (Estimate)

March 20, 2009

Study Record Updates

Last Update Posted (Estimate)

March 20, 2009

Last Update Submitted That Met QC Criteria

March 19, 2009

Last Verified

March 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ILI-08-108WMGTP
  • 14895

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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