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Exenatide and Brown Adipose Tissue (exe01)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03002675
Recruitment Status : Unknown
Verified December 2016 by Ingrid Jazet, Leiden University Medical Center.
Recruitment status was:  Recruiting
First Posted : December 26, 2016
Last Update Posted : December 26, 2016
Information provided by (Responsible Party):
Ingrid Jazet, Leiden University Medical Center

Brief Summary:

The obesity epidemic has led to a enormous increase in the prevalence of type 2 diabetes mellitus (T2D), dyslipidemia and cardiovascular events. Particularly South Asians, who comprise 1/5 of the world population, are at increased risk of developing a disadvantageous metabolic phenotype and these diseases. Moreover, T2D occurs at a younger age and at a lower BMI when compared to white Caucasians. Recent research has shown that South Asians not only have a lower energy expenditure than their Caucasian counterparts, but also less active brown adipose tissue (BAT).

For some time, it has been known that adult humans have active BAT. This metabolic tissue produces heat by combusting triglycerides, in contrast to white adipose tissue, which stores this form of energy. It has been shown that activation of BAT has a positive effect on whole body metabolism, via increasing energy expenditure and improving glucose- and lipid metabolism. For this matter, BAT has been proposed as a major key player in energy homeostasis, which may be implemented in the current combat against the obesity epidemic. Aside from cold exposure, more research focuses on pharmacological activation of BAT.

Glucagon-like peptide 1 (GLP-1) is an incretin hormone which is produced by intestinal L-cells and upon food intake stimulates insulin secretion by pancreatic beta cells. The GLP-1 analogue Exenatide is a currently much used antidiabetic drug to reduce hyperglycemia via this aforementioned mechanism. Beyond its blood glucose-improving effects, Exenatide has also shown to lower body weight and improve dyslipidemia in T2D patients. Elucidation of the underlying mechanism of these beneficial effects is highly relevant.

Recent preclinical research in our group has shown that central activation of the GLP-1 receptor through exenatide increases BAT activity and thereby contributes to weight loss and improvement of dyslipidemia. The aim of this research project is to investigate whether exenatide is also able to activate BAT and increase resting energy expenditure, thereby improving glucose- and lipid metabolism and reducing fat mass and body weight in humans. Moreover, the investigators aim to validate the MRI scan as a novel way to measure BAT activity. The investigators hope that these forthcoming findings lead to the discovery of new treatment strategies against obesity.

Condition or disease Intervention/treatment Phase
Obesity Drug: Bydureon Phase 4

Detailed Description:
The current study is an open-label single arm prospective design, including 24 healthy young lean males (BMI between 18 and 25 kg/m2), of whom 12 Dutch South Asians and 12 Dutch Caucasians. After a medical screening, included subjects will receive 12 weeks of treatment with the GLP-1 analogue exenatide (Bydureon; 2 mg s.c. 1x/wk). Study subjects will visit the LUMC weekly. Before and after treatment there will be a study day, in which BAT (by means of 18F-FDG PET-CT scan and MRI scan), resting energy expenditure (measured by indirect calorimetry) and fat mass (by bio-impedance analysis) will be measured. Moreover, blood will be drawn to investigate the effects of exenatide on lipid- and glucose metabolism.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 24 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: The Effect of Exenatide on Brown Adipose Tissue Activity and Energy Expenditure in Healthy Young Men
Study Start Date : August 2016
Estimated Primary Completion Date : June 2018

Resource links provided by the National Library of Medicine

Drug Information available for: Exenatide

Arm Intervention/treatment
Experimental: exenatide
Participants will receive exenatide (Bydureon, 2mg s.c. 1x/wk, AstraZeneca) during 12 weeks
Drug: Bydureon
exenatide (Bydureon) 2mg s.c. 1x/wk
Other Name: exenatide

Primary Outcome Measures :
  1. The effect of exenatide on BAT activity and energy expenditure in healthy young South Asian compared to white Caucasian men [ Time Frame: End of the study, up to 21 months ]

Secondary Outcome Measures :
  1. Visualisation of BAT as measured with MRI scan compared to FDG-PET CT [ Time Frame: End of the study, up to 21 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Dutch South Asian or white Caucasian male, 20-30 years
  • BMI ≥ 18 and ≤ 25 kg/m2
  • Good general health

Exclusion Criteria:

  • BMI > 25 kg/m2 or < 18 kg/m2
  • Use of medication known to influence glucose and/or lipid metabolism or brown fat activity (e.g. beta blockers)
  • Any significant chronic disease
  • Renal, hepatic or endocrine disease
  • Smoking
  • Participation in an intensive weight-loss program or vigorous exercise program during the last year before the start of the study
  • Recent participation in other research projects (within the last 3 months), participation in 2 or more projects in one year
  • Contraindications for undergoing an MRI scan:
  • Presence of non-MR safe metal implants or objects in the body.
  • Pacemaker, neurostimulator, hydrocephalus pump, drug pump, non-removable hearing aid, large recent tattoos.
  • Claustrophobia
  • Tinnitus or hyperacusis

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03002675

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Contact: Ingrid Jazet Jazet, MD

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Leiden University Medical Center Recruiting
Leiden, Zuid-Holland, Netherlands, 2333 ZA
Contact: Ingrid Jazet, MD, PhD    +33-715268161   
Contact: Mariëtte Boon, PhD    +31-715265462   
Sponsors and Collaborators
Ingrid Jazet
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Principal Investigator: Ingrid Jazet, MD Leiden University Medical Center
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Ingrid Jazet, Dr, Leiden University Medical Center Identifier: NCT03002675    
Other Study ID Numbers: P16.078
First Posted: December 26, 2016    Key Record Dates
Last Update Posted: December 26, 2016
Last Verified: December 2016
Keywords provided by Ingrid Jazet, Leiden University Medical Center:
Adipose tissue
Type 2 diabetes
Additional relevant MeSH terms:
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Hypoglycemic Agents
Physiological Effects of Drugs
Anti-Obesity Agents
Hormones, Hormone Substitutes, and Hormone Antagonists