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Sleep apnea may damage fat cells, raising heart risks

NCT ID NCT03307330

Knowledge-focused Sponsor: Mayo Clinic Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at how sleep apnea changes fat tissue in adults. Researchers will take small fat samples from the belly and thigh to check for signs of cell damage. They hope to understand why sleep apnea raises the risk of heart disease. The study is currently recruiting 120 participants at Mayo Clinic.

What this could mean

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

What this could lead to
If successful, this study could reveal how sleep apnea damages fat tissue, pointing to new ways to reduce heart disease risk in people with sleep apnea.
What could go wrong
This is an observational study, not a treatment trial. It will not directly test any therapy, and results may not lead to immediate clinical changes.

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

About 120 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2018

Expected to finish

Dec 2029

An estimate. End dates often move.

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

Subjects with obstructive sleep apnea and healthy subjects without chronic diseases and interested in participating will be enrolled in this study.

Ages

18 to 60 years

Sex

Anyone

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.

Inclusion Criteria * BMI ≤40 kg/m2 * Not a current smoker or tobacco user * Individuals with treated hypertension, prehypertension, and dyslipidemia will be allowed to participate in the study * On no prescription medications other than those medications used to treat asthma, seasonal or environmental allergies (such as Cetirizine, Fexofenadine, Desloratadine, Loratadine, etc), depression, acid reflux (such as antacids or proton pump inhibitors), topical skin treatment medications or shampoos, contraceptive pills, or intrauterine devices. Other medications may be allowed at the discretion of the study staff. * Not pregnant or breast feeding and not intending to become pregnant or breast feed * Ability to provide written informed consent * If a subject is on aspirin or any other anti-inflammatory medication but free of known vascular disease and depending on the indication, the study doctor may ask the subject to suspend aspirin or anti-inflammatory therapy for 7 days prior to participation in the study. In the event that the subject does not stop the aspirin or other anti-inflammatory medication, they will not be able to participate in the study because of the risk of bleeding during the fat biopsy. Exclusion Criteria * Vulnerable study population will be excluded * Presence of chronic kidney disease (creatinine \>2.5 mg/dL) and/or active cancers * Pregnancy * Anemic (hemoglobin \<12 g/dL for men and \<11 g/dL for women) * Smoking * Use of chronic medications (statins, anti-inflammatory drugs, angiotensin II receptor blockers (ARBs) and/or angiotensin-converting enzyme (ACE) inhibitors) * Blood or plasma donation during the past 2 months

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Conditions

The condition(s) this trial relates to.

obstructive sleep apnea syndrome

As listed by the trial registrant

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

Obstructive sleep apnea of adult

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Mayo Clinic

    RECRUITING

    Rochester, Minnesota, 55901, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.