Clinical trial Recruiting at 1 site Interventional Ages 18 to 65

Effects of weight loss on insulin regulation after bariatric surgery

Official title: Long-term, Substantial Weight Loss and Insulin Regulation of Lipolysis

Run by Mayo Clinic · NCT03868592 · Data updated 2026-11-12

This study tests if losing a lot of weight after bariatric surgery helps people with severe obesity improve their insulin function and reduce inflammation over a year.

More Obesity, Morbid trials

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment30 (estimated)
SponsorMayo Clinic
Academic / other
Locations1 site (Rochester, Minnesota)
StatusRecruiting
StartedAugust 1, 2019
Main results expectedMay 2027
Study endsMay 2027
Registry record updatedMarch 3, 2026
Trial IDNCT03868592 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are individuals with a BMI between 40 and 50 kg/m2 who do not have active physical illnesses that would interfere with mobility or weight loss.

Probably not a fit

Patients with Type 1 or Type 2 diabetes, active coronary artery disease, or those who smoke may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates how substantial weight loss through bariatric surgery, specifically sleeve gastrectomy, affects insulin regulation of lipolysis in individuals with Class III obesity. Researchers will analyze the relationship between adipose inflammatory cells, cytokine content, and insulin resistance before and after the surgery. The goal is to determine if sustained weight loss leads to reduced inflammation and improved insulin function over a one-year period.

Why it matters

Potential benefit: If successful, this study could provide insights into how weight loss can improve insulin regulation and potentially reduce obesity-related complications.

How similar studies have gone: Other studies have shown promising results regarding the effects of bariatric surgery on insulin regulation and weight loss, indicating that this approach is supported by existing research.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* BMI 40 - 50 kg/m2.
* Mo active physical illness that would interfere with mobility or weight loss after bariatric surgery

Exclusion Criteria:

* Type 1 or Type 2 Diabetes diagnosis or fasting plasma glucose ≥126 mg/dL
* Active coronary artery disease
* Participation in structured exercise (\>2 times per week for 30 minutes or longer)
* Smoking
* Medications known to affect adipose tissue metabolism (e.g., beta blockers, corticosteroids)
* Renal insufficiency (serum creatinine \> 1.5mg/dl)
* Chronic active liver disease (Bilirubin \> 17mmol/L, AST \> 144 IU/L, or ALT\>165IU/L)
* Pregnancy or breastfeeding.

Where it's running

  • Mayo Clinic
    Rochester, Minnesota, United States
    Recruiting

Study contacts

  • Principal investigator: Michael D Jensen, MD — Mayo Clinic

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.