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Tiny fat cell particles may reveal how obesity harms blood vessels

NCT ID NCT06776081

Knowledge-focused Sponsor: University of Colorado, Boulder 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tiny particles released from fat cells, called extracellular vesicles, and how they relate to blood vessel function in people with obesity. Researchers will compare normal-weight and obese adults, then have obese participants follow a 12-week weight loss diet. The goal is to see if weight loss reduces these particles and improves blood vessel health.

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 a new way to measure and understand how obesity harms blood vessels, potentially guiding future treatments.
What could go wrong
This is an early observational study, not a treatment trial. It may not prove cause and effect, and results may not apply to all people with obesity.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 84 people

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

Started

Jul 2024

Expected to finish

Jun 2027

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.

Ages

40 years and older

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: * Age ≥40 years * BMI \<25 kg/m2 and BMI \>25 kg/m2 for Phase 1 and BMI \>25 kg/m2 for Phase 2. Rationale for defining obesity as BMI \>25 kg/m2 Exclusion criteria: * Current smoker * Chronic overt medical condition (e.g., evidence of coronary artery disease on resting ECG, any history of myocardial infarction or stroke, or cancer, diabetes based on fasting blood glucose concentration) * Alcohol abuse or dependence defined as more than 14 standard drinks/week and no more than 4 standard drinks/day for men and 7 standard drinks/week and 3 standard drinks/day for women (a standard drink is defined as 12 ounces of beer, 5 ounces of wines, 1 ½ ounces of 80-proof distilled spirits) reported during the medical history/physical exam * Stage III hypertension (systolic blood pressure \>160 mmHg and/or diastolic blood pressure \>100 mmHg) * Regular vigorous aerobic/endurance exercise (\>3 bouts/week, \>30 minutes/bout at a workload \>6 METS) * Women who are pregnant or breastfeeding * History of anaphylaxis to betadine, lidocaine, iodine * Raynaud's disease * History of clotting disorders * Anyone taking blood thinners and clotting medications * Anyone taking statin medication * Planned pregnancy in coming 4-6 months

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder Weight Loss

As listed by the trial registrant

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

Obesity Weight loss

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

  • University of Colorado Boulder Clinical and Translational Research Center (CTRC)

    RECRUITING

    Boulder, Colorado, 80309, United States

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