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CompletedNCT00856609Updated Jun 4, 2019Results posted

The Effects of Exenatide (Byetta ) on Energy Expenditure and Weight Loss in Nondiabetic Obese Subjects

A Phase 3 interventional study of Byetta (exenatide) and Weight loss in Weight Loss and Obesity, sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Completed at 1 site in United States. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-06-04.

Sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
150
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

Exenatide is an incretin-like drug that has been approved for treatment of type 2 diabetes; it improves glycemia by increasing insulin and decreasing glucagon secretion by pancreatic islet cells and delaying gastric emptying. This randomized, placebo-controlled study is to evaluate whether exenatide over a 5 week period in non-diabetic obese subjects may lead to weight loss. To control for variability in individual response to weight loss treatment, this study will assess the role of exenatide in changing food intake and energy expenditure as possible sources of weight loss. This study will also evaluate the safety profile of exenatide in non-diabetic obese people. Additional assessments will evaluate changes in body fat and hormones involved in the sensations of hunger and fullness.

Read the detailed description

Obesity can lead to a number of health problems including diabetes, heart disease, stroke, low back pain, fatty liver disease, and osteoarthritis. The medical treatments currently available for obesity are limited. Exenatide is an injectable medication approved for treatment of type 2 diabetes that causes weight loss in some diabetic subjects. The reasons exenatide is thought to cause weight loss include decreased food intake, increased feelings of fullness and nausea. Because levels of a human gut hormone (glucagon like peptide 1) that is similar to exenatide have been shown to be related to resting energy expenditure, it is also possible that exenatide may have effects on a person s metabolism, a.k.a. energy expenditure, but any effect of exenatide on energy expenditure has yet to be evaluated. Even though exenatide is used to treat diabetes, administration of exenatide to non-diabetic lean individuals did not cause frankly low blood sugars.

The primary goal of this study is to investigate the way in which exenatide given twice a day to obese (BMI >= 30 kg/m\^2) people without diabetes might lead to weight loss. Because response to weight loss treatment can be highly variable between individuals, we will look at the role of exenatide in changing food intake and energy expenditure as possible explanations for weight loss. We will also assess the safety profile of exenatide in non-diabetic obese people.

This study will involve the use of exenatide or placebo, determined randomly, in obese individuals without diabetes over a 5 week period. The primary measurements will include effects of exenatide on energy expenditure and food intake. We will also look at changes in body fat and the levels of hormones involved in the sensations of hunger and fullness. We will assess if any exenatide-induced changes can predict which individuals lose weight over the 5 weeks. The safety and side effects of exenatide in non-diabetic individuals during this time will also be determined. Findings from this study would help to determine how exenatide works to cause weight loss in people without diabetes, who might benefit most, and would help to improve understanding of why some people respond better to weight loss treatment than others.

02

Conditions studied

  • Weight Loss
  • Obesity

Keywords

  • Weight Loss
  • Byetta (Exenatide)
  • Energy Expenditure
  • Food Intake
  • Obesity
03

In context

Body Weight

1,223 studies on the registry are indexed under Body Weight; 131 are open to participants now.

This study's enrollment of 150 is above the median of 64 across 947 interventional studies indexed under Body Weight.

Browse Body Weight studies →

Lead sponsor

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) is the lead sponsor of 529 studies on the registry; 54 are open to participants now.

Of its 79 completed or terminated interventional studies of FDA-regulated products, 50 (63%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Premenopausal women and men \< 55 years of age
  • BMI >30 kg/m(2)
  • Expressed desire for weight loss
  • Stable weight (variation \< 2.3 kg within past 6 months)
  • Ability to provide informed consent
  • Ability to follow verbal and written instructions
  • Nonsmoker
  • Ability to commute to study site on a regular basis for short outpatient visits over 5 weeks
  • For females, use of a medically approved form of contraception. For oral contraceptives, subjects will need to be on an established dose for at least 3 months to ensure stable weight and will be asked not to switch contraceptive methods during study participation.

Exclusion criteria

EXCLUSION CRITERIA:

  • Age \< 18 years
  • Use of other medications to treat obesity including medications obtained over the counter or internet, orlistat (Xenical, Alli), sibutramine (Meridia), topiramate (with or without phentermine (Qsymia), phentermine (Adipex P) or lorcaserin (Belviq) within the past 6 months
  • History of an eating disorder including anorexia or bulimia
  • History of surgery for the treatment of obesity (gastric banding, gastric bypass)
  • Diagnosis of type 1 or type 2 diabetes mellitus according to American Diabetes Association guidelines
  • Previous exposure to exenatide
  • Uncontrolled hypertension as defined by a blood pressure of 150/90 on two or more occasions or use of antihypertensive medications which may affect energy expenditure including alpha blockers, beta blockers, angiotensin receptor blockers or inhibitors of angiotensin converting enzyme
  • Current use of tobacco products, marijuana, amphetamines, cocaine or intravenous drug use
  • Chronic ethanol use (> 3 drinks /day)
  • Endocrine disorders including hypo or hyperthyroidism (including subclinical disease), Cushing s disease, growth hormone deficiency or other pituitary diseases
  • History of pancreatitis
  • Personal or family history of multiple endocrine neoplasia (MEN)-2 or medullary thyroid cancer
  • History of unresolved gallstones
  • Hyperamylasemia
  • Fasting triglyceride level greater than or equal to 500
  • Gastroparesis
  • Inflammatory bowel disease or malabsorption disorders
  • Malignancy treated with chemotherapy or radiation within the past 5 years
  • Current clinical depression, diagnosis of psychosis or recent use of psychotropic medication
  • Pregnancy within past 6 months
  • Breastfeeding
  • Failure to use medically approved contraceptive methods if subject is female
  • Liver function abnormalities (transaminases greater than twice normal)
  • Renal insufficiency (creatinine clearance \< 50 ml/min)
  • History of chronic infection including tuberculosis, coccidiomycoses, lyme disease or HIV infection
  • Pulmonary disorders, including chronic obstructive pulmonary disease, which would limit ability to follow the protocol (investigator judgment)
  • Cardiovascular disease including history of myocardial infarction, unstable angina or heart failure
  • Central nervous system disease, including history of cerebrovascular accidents, dementia, and neurodegenerative disorders
  • Weight \<450 pounds (maximum weight of the DXA machine as per manufacturer s manual)
  • Sensitivity to exenatide or any inert components in its formulation
  • Sensitivity to acetaminophen
  • Conditions not specifically mentioned above may serve as criteria for exclusion at the discretion of the investigators
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
150 participants (actual)

Study arms

  • Active comparator
    Exenatide

    10 micrograms subcutaneously twice

    Drug: Byetta (exenatide) · Behavioral: Weight loss

  • Placebo comparator
    Placebo

    Twice daily

    Other: Metabolic Chamber · Drug: Placebo

Interventions

  • DrugByetta (exenatide)

    Exenatide is an injectable medication

  • BehavioralWeight loss

    Because response to weight loss

  • OtherMetabolic Chamber

    The subject stays in the small room

  • DrugPlacebo
06

What researchers measure

Primary outcomes

  1. Energy Intake

    Mean of 3-day food intake change between 3 days (Day 6-7-8) at baseline assessment and 3 days (Day 12-13-14) during the intervention period between the exenatide and placebo groups

    Time frame: Day 6-7-8 (at baseline) and Day 12-13-14 (3 days after starting study intervention)

  2. Twenty-four-hour Energy Expenditure

    Change of twenty-four-hour energy expenditure between at Day 5 at baseline assessment and at Day 11 two days after starting study medication between the exenatide and placebo groups

    Time frame: Day 5 and Day 11

Secondary outcomes

  1. Body Weight

    Mean decrease between pre- and post-randomization in 5 Weeks between the exenatide and placebo groups.

    Time frame: 5 weeks

07

Results

Posted Jan 12, 2018

Participant flow

Participant flow — Overall Study
MilestoneExenatidePlacebo
Started4139
Completed4039
Not completed10
Withdrew: Adverse event10

Outcome measures

PrimaryEnergy Intake

Mean of 3-day food intake change between 3 days (Day 6-7-8) at baseline assessment and 3 days (Day 12-13-14) during the intervention period between the exenatide and placebo groups

Time frame:
Day 6-7-8 (at baseline) and Day 12-13-14 (3 days after starting study intervention)
Reported as:
Mean · kcal/day
Energy Intake
kcal/dayExenatidePlacebo
Energy Intake1016.1 ± 724.5245.1 ± 710.5
Statistical analysis
  • Exenatide vs Placebo · ANCOVA · p = 0.01 · Slope: -624.8 · 95% CI -901.8 to -347.8
PrimaryTwenty-four-hour Energy Expenditure

Change of twenty-four-hour energy expenditure between at Day 5 at baseline assessment and at Day 11 two days after starting study medication between the exenatide and placebo groups

Time frame:
Day 5 and Day 11
Reported as:
Mean · kcal/day
Twenty-four-hour Energy Expenditure
kcal/dayExenatidePlacebo
Twenty-four-hour Energy Expenditure51.6 ± 157.228.9 ± 119.7
Statistical analysis
  • Exenatide vs Placebo · ANCOVA · p = 0.01 · Slope: -24 · 95% CI -89.7 to 41.4
SecondaryBody Weight

Mean decrease between pre- and post-randomization in 5 Weeks between the exenatide and placebo groups.

Time frame:
5 weeks
Reported as:
Mean · kg
Body Weight
kgExenatidePlacebo
Body Weight1.6 ± 3.150.27 ± 2.96
Statistical analysis
  • Exenatide vs Placebo · ANCOVA · p = 0.05 · Slope: -1.48 · 95% CI -3.02 to 0.05

Adverse events

Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Exenatide0/40 (0%)0/40 (0%)39/40 (97.5%)
Placebo0/39 (0%)0/39 (0%)39/39 (100%)
Most frequent other events
Showing 10 of 12
Most frequent other events
EventExenatidePlacebo
hunger decreaseMetabolism and nutrition disorders39/404/39
NauseaGastrointestinal disorders24/4019/39
HeadacheGeneral disorders23/4021/39
DiarrheaGastrointestinal disorders16/4016/39
Gastroesophageal refluxGastrointestinal disorders13/4015/39
ConstipationGastrointestinal disorders14/409/39
Injection site reactionProduct Issues13/405/39
ItchinessSkin and subcutaneous tissue disorders12/404/39
VomitingGastrointestinal disorders11/408/39
hypoglycemiaEndocrine disorders10/403/39

Baseline characteristics

Age, Continuous
Age, Continuous(years)ExenatidePlaceboTotal
Mean35.1 ± 8.433.7 ± 9.034.4 ± 8.7
Sex: Female, Male
Sex: Female, Male(Participants)ExenatidePlaceboTotal
Female232346
Male171633
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)ExenatidePlaceboTotal
African American1910
White111021
Hispanic4610
Native American221436
Other202
Body weight
Body weight(kg)ExenatidePlaceboTotal
Mean105.5 ± 19.2108.8 ± 20.7107.1 ± 19.9
Body Mass Index
Body Mass Index(kg/m^2)ExenatidePlaceboTotal
Mean38.0 ± 6.638.2 ± 6.838.1 ± 6.7
Fat free mass
Fat free mass(Kg)ExenatidePlaceboTotal
Mean34.6 ± 11.537.9 ± 8.736.3 ± 12.8
Fat mass
Fat mass(Kg)ExenatidePlaceboTotal
Mean27.9 ± 8.830.8 ± 8.729.4 ± 8.8
Body fat
Body fat(percent)ExenatidePlaceboTotal
Mean44.0 ± 6.944.4 ± 8.744.2 ± 7.8

15 further baseline measures are reported on the registry.

08

Study locations

1 site
  • NIDDK, Phoenix
    Phoenix, Arizona 85014, United States
09

References and documents

Publications

  • Buse JB, Klonoff DC, Nielsen LL, Guan X, Bowlus CL, Holcombe JH, Maggs DG, Wintle ME. Metabolic effects of two years of exenatide treatment on diabetes, obesity, and hepatic biomarkers in patients with type 2 diabetes: an interim analysis of data from the open-label, uncontrolled extension of three double-blind, placebo-controlled trials. Clin Ther. 2007 Jan;29(1):139-53. doi: 10.1016/j.clinthera.2007.01.015. PubMed 17379054 ↗
  • Buse JB, Henry RR, Han J, Kim DD, Fineman MS, Baron AD; Exenatide-113 Clinical Study Group. Effects of exenatide (exendin-4) on glycemic control over 30 weeks in sulfonylurea-treated patients with type 2 diabetes. Diabetes Care. 2004 Nov;27(11):2628-35. doi: 10.2337/diacare.27.11.2628. PubMed 15504997 ↗
  • Amori RE, Lau J, Pittas AG. Efficacy and safety of incretin therapy in type 2 diabetes: systematic review and meta-analysis. JAMA. 2007 Jul 11;298(2):194-206. doi: 10.1001/jama.298.2.194. PubMed 17622601 ↗
  • Hollstein T, Basolo A, Ando T, Votruba SB, Krakoff J, Piaggi P. Urinary Norepinephrine Is a Metabolic Determinant of 24-Hour Energy Expenditure and Sleeping Metabolic Rate in Adult Humans. J Clin Endocrinol Metab. 2020 Apr 1;105(4):1145-56. doi: 10.1210/clinem/dgaa047. PubMed 32002540 ↗
  • Stinson EJ, Graham AL, Thearle MS, Gluck ME, Krakoff J, Piaggi P. Cognitive dietary restraint, disinhibition, and hunger are associated with 24-h energy expenditure. Int J Obes (Lond). 2019 Jul;43(7):1456-1465. doi: 10.1038/s41366-018-0305-9. Epub 2019 Jan 16. PubMed 30651576 ↗
  • Basolo A, Burkholder J, Osgood K, Graham A, Bundrick S, Frankl J, Piaggi P, Thearle MS, Krakoff J. Exenatide has a pronounced effect on energy intake but not energy expenditure in non-diabetic subjects with obesity: A randomized, double-blind, placebo-controlled trial. Metabolism. 2018 Aug;85:116-125. doi: 10.1016/j.metabol.2018.03.017. Epub 2018 Mar 26. PubMed 29596853 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 4, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00856609
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Responsible party
Sponsor
First posted
Mar 6, 2009
Start date
Mar 3, 2009
Primary completion
Sep 19, 2016
Completion
Sep 19, 2016
Results posted
Jan 12, 2018
Last update
Jun 4, 2019

Study contacts

Jonathan Krakoff, M.D.
principal investigator · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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