The Effects of Metabolic & Bariatric Surgery on Lipid Metabolism, Myeloid-Derived Suppressor Cells, and Cancer Cell Biology

September 14, 2026 updated by: Zubaidah Nor Hanipah, Pennington Biomedical Research Center
This study aims to determine the relationship between lipid metabolic alterations associated with insulin resistance changes, and blood immunosuppressive-type cells (MDSC) by metabolic and bariatric surgery in two patient cohorts matched on demographic and clinical factors

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.

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.
Observational

Enrollment (Actual)

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.
11

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Louisiana
      • Baton Rouge, Louisiana, United States, 70808
        • Pennington Biomedical Resarch Center

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

  • Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

The study population will include women with class III obesity who plan to undergo or have completed treatment with metabolic and bariatric surgery.

Description

For an eligible subject, all the following must be answered "yes":

  • Biological female sex
  • Age >=35 and <=60 years (including pre- and postmenopausal)
  • Self-reported white or black race
  • The study will enroll approximately 50% white and 50% black subjects
  • Body mass index >/=40 kg/m2
  • Planned to have bariatric surgery or post-bariatric surgery
  • Ability to provide written informed consent
  • Allow the collection and storage of biospecimens and data for future use
  • Not having yet started the pre-op liquid diet before the bariatric surgery

For an eligible subject, all the following must be answered "no":

  • Have type one diabetes
  • Use of anti-inflammatory medications, such as glucocorticoids or non-steroidal anti-inflammatory medications, within the past 15 days
  • History of cancer of any type
  • History of chronic conditions known to cause inflammation, such as tuberculosis, autoimmune disease, and human immunodeficiency virus
  • An acute history (within the past 60 days) or confirmed or suspected SARS-CoV-2 (COVID-19) infection
  • Currently pregnant, breastfeeding, or planning to become pregnant within the next 52 weeks
  • Currently participating in another study with competing outcomes
  • Any other situation that, in the opinion of the investigator, would negatively impact subject safety or successful compliance with the protocol

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

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
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.
Cohort 1
Cohort #1 (within-subject) will enroll up to 10 women with class III obesity who plan to undergo metabolic and bariatric surgery as a standard of obesity care. Subjects will complete study measures preoperatively
Procedure: Metabolic & Bariatric Surgery
Metabolic and Bariatric surgery such as Roux-en-Y gastric bypass and Sleeve gastrectomy
Cohort 2
Cohort #2 (between-subject) will enroll up to 10 women with a history of class III obesity who underwent metabolic and bariatric surgery as a standard of obesity care approximately one year before enrollment. Subjects in this cohort will be matched on demographic and clinical variables to those in Cohort #1.
Procedure: Metabolic & Bariatric Surgery
Metabolic and Bariatric surgery such as Roux-en-Y gastric bypass and Sleeve gastrectomy

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
Plasma Fatty Acid Concentration in Circulation After Bariatric Surgery and Bariatric Surgery
Time Frame: Pre Bariatric surgery (Cohort 1), 1 year Post Bariatric surgery (Cohort 2)
Fatty acid concentration in serum plasma (mean and SD) before bariatric surgery (cohort 1) and 1-year post bariatric surgery (cohort 2) were measured.
Pre Bariatric surgery (Cohort 1), 1 year Post Bariatric surgery (Cohort 2)

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
Metabolic, Inflammatory, and Immunologic Adaptations
Time Frame: Pre Bariatric surgery (Cohort 1), 1 year Post Bariatric surgery (Cohort 2)
To characterize and compare systemic and tissue-specific metabolic, inflammatory, and immunologic adaptations associated with metabolic and bariatric surgery by assessing a range of physiologic and molecular endpoints in Cohort #1 (pre-surgery) versus Cohort #2 (post-surgery)
Pre Bariatric surgery (Cohort 1), 1 year Post Bariatric surgery (Cohort 2)

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Adipose Tissue-derived Conditioned Media
Time Frame: Pre bariatric surgery (cohort 1) and post Bariatric surgery (cohort 2)

Obtain an adipose tissue biopsy (subcutaneous and/or visceral) to generate adipose tissue-derived conditioned media with and without induction of lipolysis for in vitro experiments.

Arm 1 (cohort 1) and Arm 2 (cohort 2)
Pre bariatric surgery (cohort 1) and post Bariatric surgery (cohort 2)

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.
Pennington Biomedical Research Center

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Louisiana State University Health Sciences Center in New Orleans

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: Justin Brown, Ph.D., Pennington Biomedical Research Center

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 (Actual)

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.
January 1, 2024

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.
March 1, 2026

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.
April 1, 2026

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).
September 22, 2023

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.
September 22, 2023

First Posted (Actual)

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.
September 28, 2023

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.
September 15, 2026

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.
September 14, 2026

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.
September 1, 2026

More Information

Terms related to this study

Keywords

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.
  • PBRC 2023-026

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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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