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.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 30 (estimated) |
| Sponsor | Mayo Clinic Academic / other |
| Locations | 1 site (Rochester, Minnesota) |
| Status | Recruiting |
| Started | August 1, 2019 |
| Main results expected | May 2027 |
| Study ends | May 2027 |
| Registry record updated | March 3, 2026 |
| Trial ID | NCT03868592 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.
-
Glycemic variability after SASI versus Roux-en-Y gastric bypass
This trial tests whether SASI or Roux-en-Y gastric bypass leads to different glucose fluctuations in adults with severe obesity using continuous glucose monitoring.
-
Postoperative nausea, vomiting and pain after bariatric surgery in Sweden
This study looks at how often people have nausea, vomiting, and pain after bariatric surgery in Sweden and whether anesthesia type or regional blocks affect those outcomes.
-
Low-impact laparoscopy for sleeve gastrectomy in adults with obesity
This will see if low-pressure, small-incision laparoscopy reduces post-surgery pain and improves breathing after sleeve gastrectomy in adults with obesity.
-
Tranexamic acid to reduce bleeding in sleeve gastrectomy and mini gastric bypass
This trial will test whether giving tranexamic acid before laparoscopic sleeve gastrectomy or mini gastric bypass reduces bleeding in adults with morbid obesity.
-
Predicting Quality of Life After Bariatric Surgery from Pre-Surgery Profiles
This study tests whether pre-surgical patient traits can predict how quality of life changes after bariatric surgery for adults in the GEROM73 program.
-
Endoscopic treatment for overweight and mild obesity using Orbera365
This study is testing whether the Orbera365 intragastric balloon can help people who are overweight or mildly obese lose weight over a year.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.