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Cardiovascular Effects of GLP-1 Receptor Activation

Primary Purpose

Obesity, PreDiabetes

Status
Completed
Phase
Phase 4
Locations
United States
Study Type
Interventional
Intervention
Liraglutide
Sitagliptin
hypocaloric diet
Placebos
Exendin (9-39)
Sponsored by
Vanderbilt University Medical Center
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional basic science trial for Obesity

Eligibility Criteria

18 Years - 65 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  1. Men and women,
  2. Age 18 to 65 years, and
  3. FPG (100-125 mg/dL) or, IGT (two-hour plasma glucose 140-199 mg/dL) or, HbA1C 5.7-6.4%
  4. BMI≥30 kg/M2
  5. The ability to provide informed consent before any trial-related activities.

Exclusion Criteria:

  1. Diabetes type 1 or type 2, as defined by a FPG of 126 mg/dL or greater, a two-hour plasma glucose of 200 mg/dL or greater, or the use of anti-diabetic medication
  2. Resistant hypertension, defined as hypertension requiring the administration of more than three anti-hypertensive agents including a diuretic to achieve control
  3. Use of spironolactone
  4. Known or suspected allergy to trial medications, excipients, or related products.
  5. Family or personal history of multiple endocrine neoplasia type 2 (MEN2) or familial medullary thyroid carcinoma
  6. Personal history of non-familial medullary thyroid carcinoma
  7. History of pancreatitis
  8. Contraindications to study medications, worded specifically as stated in the product's prescribing information
  9. Pregnancy or breast-feeding. Women of child-bearing potential will be required to have undergone tubal ligation or to be using an oral contraceptive or barrier methods of birth control
  10. Subjects who have participated in a weight-reduction program during the last six month or whose weight has increased or decreased more than two kg over the preceding six months
  11. Cardiovascular disease such as myocardial infarction within six months prior to enrollment, presence of angina pectoris, significant arrhythmia, congestive heart failure (left ventricular hypertrophy acceptable), deep vein thrombosis, pulmonary embolism, second or third degree heart block, mitral valve stenosis, aortic stenosis or hypertrophic cardiomyopathy
  12. Treatment with anticoagulants
  13. History of serious neurologic disease such as cerebral hemorrhage, stroke, or transient ischemic attack
  14. History or presence of immunological or hematological disorders
  15. Diagnosis of asthma requiring regular inhaler use
  16. Clinically significant gastrointestinal impairment that could interfere with drug absorption
  17. Impaired hepatic function (aspartate amino transaminase [AST] and/or alanine amino transaminase [ALT] >3.0 x upper limit of normal range)
  18. Individuals with an eGFR<30 mL/min/1.73 m2 or with a UACR >1000µg/mg, where eGFR is determined by the four-variable Modification of Diet in Renal Disease (MDRD) equation, where serum creatinine is expressed in mg/dL and age in years: eGFR (mL/min/1.73m2)=186 • Scr-1.154 • age-0.203 • (1.212 if black) • (0.742 if female)
  19. Hematocrit <35%
  20. Any underlying or acute disease requiring regular medication which could possibly pose a threat to the subject or make implementation of the protocol or interpretation of the study results difficult
  21. Treatment with chronic systemic glucocorticoid therapy (more than 7 consecutive days in 1 month)
  22. Treatment with lithium salts
  23. History of alcohol or drug abuse
  24. Treatment with any investigational drug in the one month preceding the study
  25. Previous randomization in this trial
  26. Mental conditions rendering a subject unable to understand the nature, scope and possible consequences of the study
  27. Inability to comply with the protocol, e.g., uncooperative attitude, inability to return for follow-up visits, and unlikelihood of completing the study

Sites / Locations

  • Vanderbilt University Medical Center

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm Type

Experimental

Active Comparator

Active Comparator

Arm Label

liraglutide

sitagliptin

hypocaloric diet

Arm Description

Subjects in the liraglutide group will receive subcutaneous liraglutide (0.6 mg/d for one week, 1.2 mg/d for one week, and then 1.8 mg/d for 12 weeks) and oral placebo.

Subjects in the sitagliptin group will receive subcutaneous placebo daily and sitagliptin 100 mg/d orally for 14 weeks.

Subjects in the hypocaloric diet group will be given a caloric goal designed to achieve a weight loss similar to that expected in the liraglutide treatment arm based on his or her resting energy expenditure. Subjects will be provided counseling and written instructions on how to achieve their daily caloric goal, including use of their own mobile phone applications to monitor caloric intake. To assure compliance with the prescribed caloric goal, subjects will meet with the study dietitian every other week for problem solving and review of diet intake logs.

Outcomes

Primary Outcome Measures

Change in Flow-mediated Dilation
Brachial artery diameter is measured under basal conditions and during reactive hyperemia (Flow Mediated Dilation as %)
Urine Albumin-to-creatinine Ratio
Ratio of urine albumin to creatinine in a spot urine collected after overnight rest
Change in Plasminogen Activator Inhibitor-1
Plasma plasminogen activator inhibitor-1 antigen

Secondary Outcome Measures

Blood Pressure
The mean of three systolic blood pressure measurements one minute apart using a oscillometric recording device with patient in supine position
Heart Rate
The mean of three measurements with the patient in the supine position
Fasting Glucose
Blood glucose collected after overnight fast
Fasting Insulin
Plasma insulin collected after overnight fast

Full Information

First Posted
March 27, 2017
Last Updated
September 25, 2022
Sponsor
Vanderbilt University Medical Center
Collaborators
American Heart Association
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1. Study Identification

Unique Protocol Identification Number
NCT03101930
Brief Title
Cardiovascular Effects of GLP-1 Receptor Activation
Official Title
Cardiovascular Effects of GLP-1 Receptor Activation
Study Type
Interventional

2. Study Status

Record Verification Date
September 2022
Overall Recruitment Status
Completed
Study Start Date
May 1, 2017 (Actual)
Primary Completion Date
June 24, 2021 (Actual)
Study Completion Date
June 24, 2021 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
Vanderbilt University Medical Center
Collaborators
American Heart Association

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Product Manufactured in and Exported from the U.S.
Yes
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This project tests the principle hypothesis that stable glucagon like peptide-1 (GLP-1) analogues have specific GLP1R-dependent beneficial effects on vascular endothelial function, fibrinolysis and inflammation in obesity that exceed the benefits of weight loss, and that genetic or other individual factors that modulate GLP1R sensitivity can modify the effect of these analogues on cardiovascular risk.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Obesity, PreDiabetes

7. Study Design

Primary Purpose
Basic Science
Study Phase
Phase 4
Interventional Study Model
Parallel Assignment
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Masking Description
Treatment with liraglutide or sitagliptin will be masked using matching placebo.
Allocation
Randomized
Enrollment
329 (Actual)

8. Arms, Groups, and Interventions

Arm Title
liraglutide
Arm Type
Experimental
Arm Description
Subjects in the liraglutide group will receive subcutaneous liraglutide (0.6 mg/d for one week, 1.2 mg/d for one week, and then 1.8 mg/d for 12 weeks) and oral placebo.
Arm Title
sitagliptin
Arm Type
Active Comparator
Arm Description
Subjects in the sitagliptin group will receive subcutaneous placebo daily and sitagliptin 100 mg/d orally for 14 weeks.
Arm Title
hypocaloric diet
Arm Type
Active Comparator
Arm Description
Subjects in the hypocaloric diet group will be given a caloric goal designed to achieve a weight loss similar to that expected in the liraglutide treatment arm based on his or her resting energy expenditure. Subjects will be provided counseling and written instructions on how to achieve their daily caloric goal, including use of their own mobile phone applications to monitor caloric intake. To assure compliance with the prescribed caloric goal, subjects will meet with the study dietitian every other week for problem solving and review of diet intake logs.
Intervention Type
Drug
Intervention Name(s)
Liraglutide
Intervention Description
subcutaneous liraglutide daily
Intervention Type
Drug
Intervention Name(s)
Sitagliptin
Intervention Description
oral sitagliptin daily
Intervention Type
Other
Intervention Name(s)
hypocaloric diet
Intervention Description
Reduced calorie intake to achieve weight loss.
Intervention Type
Drug
Intervention Name(s)
Placebos
Intervention Description
Subjects in the liraglutide arm will receive a placebo for sitagliptin. Those in the sitagliptin arm will receive a placebo for liraglutide. All subjects will receive a placebo for Exendin 9-39.
Intervention Type
Drug
Intervention Name(s)
Exendin (9-39)
Intervention Description
All subjects will receive Exendin (9-39) or matching placebo in crossover fashion during study days on the first and third days of the second week after randomization and again on the 5th and 7th days of the 14th week of treatment.
Primary Outcome Measure Information:
Title
Change in Flow-mediated Dilation
Description
Brachial artery diameter is measured under basal conditions and during reactive hyperemia (Flow Mediated Dilation as %)
Time Frame
Baseline to 2 and 14 weeks
Title
Urine Albumin-to-creatinine Ratio
Description
Ratio of urine albumin to creatinine in a spot urine collected after overnight rest
Time Frame
Baseline to 13 weeks
Title
Change in Plasminogen Activator Inhibitor-1
Description
Plasma plasminogen activator inhibitor-1 antigen
Time Frame
Baseline to 2 and 14 weeks
Secondary Outcome Measure Information:
Title
Blood Pressure
Description
The mean of three systolic blood pressure measurements one minute apart using a oscillometric recording device with patient in supine position
Time Frame
Baseline, and after 2 weeks and 14 weeks of treatment
Title
Heart Rate
Description
The mean of three measurements with the patient in the supine position
Time Frame
Baseline, and after 2 weeks and 14 weeks of treatment
Title
Fasting Glucose
Description
Blood glucose collected after overnight fast
Time Frame
Baseline, and after 2 weeks and 14 weeks of treatment
Title
Fasting Insulin
Description
Plasma insulin collected after overnight fast
Time Frame
Baseline, and after 2 weeks and 14 weeks of treatment
Other Pre-specified Outcome Measures:
Title
Change in Weight
Description
Weight measured in light clothing without shoes
Time Frame
Change from baseline to 14 weeks

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
65 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Men and women, Age 18 to 65 years, and FPG (100-125 mg/dL) or, IGT (two-hour plasma glucose 140-199 mg/dL) or, HbA1C 5.7-6.4% BMI≥30 kg/M2 The ability to provide informed consent before any trial-related activities. Exclusion Criteria: Diabetes type 1 or type 2, as defined by a FPG of 126 mg/dL or greater, a two-hour plasma glucose of 200 mg/dL or greater, or the use of anti-diabetic medication Resistant hypertension, defined as hypertension requiring the administration of more than three anti-hypertensive agents including a diuretic to achieve control Use of spironolactone Known or suspected allergy to trial medications, excipients, or related products. Family or personal history of multiple endocrine neoplasia type 2 (MEN2) or familial medullary thyroid carcinoma Personal history of non-familial medullary thyroid carcinoma History of pancreatitis Contraindications to study medications, worded specifically as stated in the product's prescribing information Pregnancy or breast-feeding. Women of child-bearing potential will be required to have undergone tubal ligation or to be using an oral contraceptive or barrier methods of birth control Subjects who have participated in a weight-reduction program during the last six month or whose weight has increased or decreased more than two kg over the preceding six months Cardiovascular disease such as myocardial infarction within six months prior to enrollment, presence of angina pectoris, significant arrhythmia, congestive heart failure (left ventricular hypertrophy acceptable), deep vein thrombosis, pulmonary embolism, second or third degree heart block, mitral valve stenosis, aortic stenosis or hypertrophic cardiomyopathy Treatment with anticoagulants History of serious neurologic disease such as cerebral hemorrhage, stroke, or transient ischemic attack History or presence of immunological or hematological disorders Diagnosis of asthma requiring regular inhaler use Clinically significant gastrointestinal impairment that could interfere with drug absorption Impaired hepatic function (aspartate amino transaminase [AST] and/or alanine amino transaminase [ALT] >3.0 x upper limit of normal range) Individuals with an eGFR<30 mL/min/1.73 m2 or with a UACR >1000µg/mg, where eGFR is determined by the four-variable Modification of Diet in Renal Disease (MDRD) equation, where serum creatinine is expressed in mg/dL and age in years: eGFR (mL/min/1.73m2)=186 • Scr-1.154 • age-0.203 • (1.212 if black) • (0.742 if female) Hematocrit <35% Any underlying or acute disease requiring regular medication which could possibly pose a threat to the subject or make implementation of the protocol or interpretation of the study results difficult Treatment with chronic systemic glucocorticoid therapy (more than 7 consecutive days in 1 month) Treatment with lithium salts History of alcohol or drug abuse Treatment with any investigational drug in the one month preceding the study Previous randomization in this trial Mental conditions rendering a subject unable to understand the nature, scope and possible consequences of the study Inability to comply with the protocol, e.g., uncooperative attitude, inability to return for follow-up visits, and unlikelihood of completing the study
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
James M. Luther, M.D.
Organizational Affiliation
Vanderbilt University Medical Center
Official's Role
Principal Investigator
Facility Information:
Facility Name
Vanderbilt University Medical Center
City
Nashville
State/Province
Tennessee
ZIP/Postal Code
37232
Country
United States

12. IPD Sharing Statement

Plan to Share IPD
Yes
IPD Sharing Plan Description
Data will be made available to researchers who provide a methodologically sound proposal that has been approved by the Vanderbilt Institutional Review Board and the study executive committee.
IPD Sharing Time Frame
The data will become available 3 months following publication of outcomes and will remain available for at least 5 years.
Links:
URL
https://www.medrxiv.org/content/10.1101/2022.02.23.22271434v1
Description
Study Pre-print on medRxiv

Learn more about this trial

Cardiovascular Effects of GLP-1 Receptor Activation

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