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NCT06416969 · Mayo Clinic

Regional Lipolysis and Adipocyte Lipolysis Protein Stimulation

What this study is about

Adults who gain most of their excess weight in the abdominal area typically do not respond to factors that "turn on" fat cells the same way as people who don't have excessive weight. Researchers are trying to understand why fat tissue responds differently in people with different body types.

View original scientific description

Adults who gain most of their excess weight in the abdominal area typically do not respond to factors that "turn on" fat cells the same way as people who don't have excessive weight. Researchers are trying to understand why fat tissue responds differently in people with different body types.

Interventions

DRUG

Somatostatin

Intravenous infusion 200 ug/hr for 2 hours, 100 ug/hr for 30 minutes

DRUG

Epinephrine

Intravenous infusion

Primary outcome measures

Free Fatty Acid (FFA) release from femoral, splanchnic and upper body subcutaneous adipose tissue

Time frame: approximately 3.5 hours

regional palmitate release rates (micromol/min) will be measured using a combination of leg and splanchnic blood flow combined with stable isotope tracer measurements of palmitate uptake and release across the leg and splanchnic bed. Upper body, non-splanchnic palmitate release will be calculated as: total palmitate release - (splanchnic palmitate release + (leg palmitate release x 2)). Release rates will be measured at baseline (overnight fasting) and in response to the infusion of somatostatin plus epinephrine. This will allow us to understand the factors that may limit maximum lipolysis stimulation in upper body obesity for leg, splanchnic and upper body non-splanchnic adipose tissue palmitate release.

stimulated FFA release in volunteers with and without obesity.

Time frame: approximately 3.5 hours

we will measure whether stimulated adipose tissue lipolysis from infusions of somatostatin and epinephrine is impaired in UBO and, if so, if this is related to regional differences in lipolysis and lipolysis-regulating proteins;

Who can participate

This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.

Inclusion criteria

  • Males and females between 18 and 65 years of age who are able to comprehend instructions, follow study procedures, willing to sign an informed consent form, and consume an isoenergetic diet eating all meals from Mayo Clinical Research and Trials Unit for at least 3 days prior to study.
  • Overweight/Obese volunteers will have a BMI 29.0 - 40.0 kg/m2 o Upper body/visceral obesity (UBO) in women will be defined as those with a waist-hip ratio (WHR) \> 0.85 and/or increased visceral fat by single slice CT scan, usually with \> 120 cm2 of visceral fat by CT scanning or a visceral fat/total fat ratio of \> 0.30, and/or biochemical evidence of metabolic syndrome as defined by adenosine triphosphate (ATP) III criteria (fasting plasma triglycerides ≥ 150 mg/dL, HDL-cholesterol \< 50 mg/dL for women and \< 40 mg/dL for men, fasting plasma glucose ≥ 100 mg/dL). Upper body obesity in men will be defined as a waist-hip ratio of \>0.95 and/or increased visceral fat (visceral fat area \> 120 cm2 or a visceral/total fat abdominal ratio by CT of \> 0.40) by single slice CT scan and/or biochemical evidence of metabolic syndrome as defined by ATP III criterial. These visceral fat values are based upon the data collected at Mayo Clinic using our methods, and are correlated with dyslipidemia and hyperinsulinemia.
  • Female subjects are eligible if they meet the following criteria:
  • Are not pregnant or nursing
  • All women of childbearing potential will have a negative urine pregnancy test at screening and a negative urine pregnancy test within 48 hours before administering study drug.
  • Recent or current research participation in a study that involves an investigational drug. Participants in other clinical trials that involve an investigational drug will not be able to participate in this study until 12 weeks after their participation in the other study is complete or \> than five half-lives of the compound, whichever is longer. If Yes look at consent form and f/u visits:
  • Current use of medications that alter fatty acid or adipose metabolism possibly given: if yes, exclude
  • Amount of blood drawn during the study (if our study plus this one draw ≥ 450 ml these should be separated by 8 weeks
  • Previous labs:
  • Fasting glucose \< 126 mg/dl for non-diabetic UBO
  • Hb ≥ 11.0 for women and ≥ 12 for men
  • platelets \> 100 000

Exclusion criteria

  • Individuals with a history of a disease process such as:
  • Ischemic heart disease
  • Atherosclerotic valvular disease
  • Persistent blood pressure greater than 160/95 despite antihypertensive medication
  • Peripheral artery disease
  • Any history of trans-ischemic attacks.
  • Coronary artery disease.
  • Liver cirrhosis
  • Significant renal impairment as documented in medical chart.
  • Diagnosis of Diabetes Mellitus.
  • Concomitant use of medications that can alter free fatty acid metabolism or pose a drug-drug interaction: statins (if yes hold for 4 weeks and receive primary care provider's approval); Niacin; Fibrates; thiazolidinedione; Beta-blockers; Oral or injected corticosteroids or anabolic steroids; Linezolid; Dihydroergotamine; Phenelzine; daily phosphodiesterase inhibitors
  • Allergy to lidocaine
  • Allergy to indocyanine green.

Where

  • Rochester, Minnesota

Collaborators

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Related conditions & keywords

Obesity

Frequently asked questions

What is a clinical trial?

A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.

Is it safe to participate?

Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.

Will I be compensated?

Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.

Will I receive a placebo instead of treatment?

When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.

Can I leave a trial if I change my mind?

Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.

How long does a clinical trial last?

Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.

Data: ClinicalTrials.gov · synced May 22, 2026 · Source of record for eligibility and locations

📊
1 of 24 participants interested
4% interest

See if this study fits

A short prescreen based on this study's listed criteria. A coordinator confirms eligibility — this is not a medical assessment.

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Study locations

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RECRUITING

Rochester

Minnesota

Location available

Express your interest

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Your information is protected and will only be shared with the research team.

What participation can include

  • Study-related care provided by the research team
  • Close monitoring by medical professionals
  • Possible compensation for time and travel*
  • The option to withdraw at any time
  • Contributing to medical research that may help future patients

*Compensation varies by study. Confirm details with coordinator.

Typical next steps

  1. 1.Submit this form
  2. 2.Phone screening
  3. 3.In-person assessment if eligible
  4. 4.Begin participation

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Obesity Treatment Options in Rochester, Minnesota

If you're searching for Obesity treatment in Rochester, participating in a clinical research study may provide access to innovative approaches under expert medical supervision. This study is actively recruiting participants in Rochester and surrounding areas.

Clinical trials offer participants the opportunity to receive cutting-edge treatments while contributing to medical research that may help future patients with Obesity. All study-related care is provided at no cost to participants.

Local Sites
1 locations in Minnesota
Now Enrolling
Up to 24 participants
Quick Start
Screening available now

Why Consider a Clinical Trial for Obesity?

Potential Benefits

  • Access to new treatment approaches before public availability
  • Close monitoring by experienced medical professionals
  • Study-related care provided at no cost
  • Contribute to medical research for Obesity

What to Expect

  • Initial screening to determine eligibility
  • Regular check-ups and monitoring visits
  • Possible compensation for time and travel
  • You can withdraw at any time

Frequently Asked Questions About This Obesity Study

Important Clinical Trial Information

This information is provided for educational purposes and does not constitute medical advice. Clinical trial participation involves potential risks and benefits. Eligibility requirements apply and will be assessed during the screening process.

Study identifier: NCT06416969. For complete study details, visit ClinicalTrials.gov. Always consult with your healthcare provider before making decisions about your medical care or participating in clinical research.