Weight-Loss surgery may rewire immune cells linked to cancer

NCT ID NCT06059651

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
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Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time

Summary

Researchers are studying how metabolic and bariatric surgery changes fat metabolism and a type of immune cell called myeloid-derived suppressor cells in women with obesity. The study compares blood and tissue samples from women before and after surgery to see if these changes relate to insulin resistance and cancer-related biology. The goal is to understand whether weight-loss surgery alters immune and metabolic factors that may influence cancer risk.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Metabolic and bariatric surgery, including gastric bypass and sleeve gastrectomy
What this could lead to
If the surgery changes immune cells and fat metabolism in ways that lower cancer risk, this could point to new ways to assess or reduce cancer risk in people with obesity.
What could go wrong
This is a small observational study of 11 women, so it cannot prove cause and effect. The findings may not apply to men, other racial groups, or people with different types of weight-loss surgery.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

11 people

The number who actually took part.

Started

Jan 2024

Finished

Apr 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

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

Ages

35 to 60 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Pennington Biomedical Resarch Center

    Baton Rouge, Louisiana, 70808, United States

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