HDL Lipidomic, Proteomic and Functional Changes in Women After Eating Eggs

January 22, 2019 updated by: University of California, Davis

HDL Lipidomic, Proteomic and Functional Changes in Response to Whole Egg Consumption in Overweight and Obese Women

The objective of this randomized, single blinded cross-over study is to investigate effects of daily egg versus yolk-free egg substitute consumption on High Density Lipoprotein (HDL) composition and function in a population of overweight and obese postmenopausal women.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The investigators hypothesize that after 4 weeks of daily consumption of whole egg versus yolk-free egg will result in differences in the HDL composition and profile of lipids and proteins (lipidome and proteome), which will be associated with changes in HDL functionality. It is further hypothesized that it will be possible to discriminate between responders and non-responders to eggs in terms of increasing both apolipoprotein A-1 (ApoA-I) content in the plasma, corresponding with more protective HDL particles; and increasing HDL functionality (cholesterol efflux and anti-oxidant capacity).

Subjects will consume an egg free diet during study protocols, except for the egg meal provided by the study. The study is comprised of two 4-week feeding periods with a 4-week washout between testing periods. While on the study, subjects will consume the equivalent of two eggs for breakfast, either whole egg or yolk-free egg. Following a 2-week low-egg lead-in period, subjects will be randomly selected to start on either arm and cross over to the other arm after the 4-week washout period.

Measured results will be compared between the baseline and the 4-week end point for each arm. Additional comparisons may be made between 4-week endpoints.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
20

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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
      • Davis, California, United States, 95616
        • University of California, Davis

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

45 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Female
  • 45-70 years old
  • Overweight or obese (BMI 25-35 kg/m2)
  • Post-menopausal (confirmed by clinical hormone levels assessed at screening if within one year of last menses)
  • Plasma HDL cholesterol greater than or equal to 50 mg/dL.

Exclusion Criteria:

  • Documented chronic diseases including diabetes, thyroid disease, metabolic syndrome, cancer (active), or previous cardiovascular events
  • Having 3 or more traits of Metabolic Syndrome
  • Egg allergy or multiple food allergies or food intolerances that would significantly limit food intake
  • Smoker
  • Current consumption more than 1 alcoholic drink/ day
  • Extreme dietary or exercise patterns
  • Recent weight fluctuations (greater than 10% in the last six months)
  • Anemia
  • Taking prescription lipid medications or other supplements known to alter lipoprotein metabolism such as isoflavones, red yeast rice, or > 1 g of fish oil/day.
  • Taking exogenous hormones (i.e. hormone replacement therapy)

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

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Whole egg
Subjects will be provided with a daily breakfast meal containing the equivalent of 2 whole eggs for 4 weeks.
Other: Whole egg
Subjects will be provided with the equivalent of 2 whole eggs daily.
Placebo Comparator: Yolk-free egg
Subjects will be provided with a daily breakfast meal containing the equivalent of 2 yolk-free eggs for 4 weeks.
Other: Yolk-free egg
Subjects will be provided with the equivalent of 2 yolk-free eggs daily.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change from baseline Apo A-1 concentration
Time Frame: 4 weeks
The concentration of HDL Apo A-1 will be measured at baseline and after 4 weeks of whole egg, and after 4 weeks of yolk-free egg consumption, in randomized order.
4 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change from baseline HDL function
Time Frame: 4 weeks
Parameters of HDL functionality (i.e. cholesterol efflux and anti-oxidant function) will be measured at baseline and after 4 weeks of whole egg, and after 4 weeks of yolk-free egg consumption, in randomized order.
4 weeks
Change from baseline HDL composition
Time Frame: 4 weeks
The lipidomic and proteomic profiles of HDL will be measured at baseline and after 4 weeks of whole egg and after 4 weeks of yolk-free egg consumption, in randomized order.
4 weeks

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of California, Davis

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Francene Steinberg, PhD, RD, University of California, Davis

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2015

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 6, 2017

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 6, 2017

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 11, 2015

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 12, 2015

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 15, 2015

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 24, 2019

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 22, 2019

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 693261

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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