Effects of Combined Dapagliflozin and Exenatide Versus Dapagliflozin and Placebo on Ectopic Lipids in Patients With Uncontrolled Type 2 Diabetes Mellitus. (EXENDA)

April 8, 2022 updated by: Alexandra Kautzky-Willer, Medical University of Vienna

A 24 Week Monocentric Prospective Randomized, Placebo-controlled Trial to Evaluate Efficacy of Combination of Exenatide and Dapagliflozin Compared to Dapagliflozin and Placebo and Its Effects on Hepatic, Myocardial and Pancreatic Fat Distribution in Patients With Uncontrolled Type 2 Diabetes Mellitus.

SGLT2 antagonists and GLP1 agonists are used since a relatively short period as second line therapy if indicated and are well tolerated by patients featuring low risk of hypoglycaemia in comparison to insulin or other oral glucose lowering drug. This new treatment options offer an effective modality to lower blood glucose, if first line therapeutics fail. According to national and international guidelines combination of oral glucose lowering drugs is possible in multiple ways, but is currently not recommended for GLP1 agonists and SGLT2 inhibitors yet, as evidence and supporting studies are missing proving efficacy and safety]. Thus studies under standardized conditions are urgently needed to answer these unsolved questions.

First results of a combination of a SGLT2 Inhibitor and a GLP1 agonist demonstrated huge potential regarding glucose and weight reduction and safety issues. However, further studies are necessary to elucidate potential mechanisms of combination therapy with SGLT2 inhibitors and GLP1 agonists and its effect on weight loss, glucose control, effects on incretins and adipokines, as well as further effects on ectopic lipid accumulation in liver and other tissues as myocard or pancreas in humans.

As both monotherapies have effects on weight and metabolism, changes in abdominal, subcutaneous, hepatic, myocardial or pancreatic lipid content might be speculated and are focus of interest in this study. Recently GLP1 agonists were shown to have effects on hepatic lipid reduction in humans with diabetes.

Hepatic lipid content and steatosis hepatis are widely discussed to have major effects on progression of diabetes and cardiovascular disease. Thus reduction of lipid accumulation in hepatic tissue might have an effect on diabetes progression.

Also higher myocardial lipid accumulation is seen in diabetic patients probably partly responsible for higher cardiovascular risk in diabetics. So far results combining these two drug classes show less weight loss as might have been expected using monotherapy, so that further investigation will definitely shed light on combination of therapeutic concepts.

Facing a multiple of positive side effects (weight loss, blood pressure lowering, potential protective cardiac effects) using a combination of SGLT2 and GLP1 seems to be a promising therapeutic option in diabetic subjects.

Study Overview

Study Type

Interventional

Enrollment (Actual)

34

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Wien, Austria, 1090
        • Abt. für Endokrinologie & Stoffwechsel, Univ. Klin f. Innere Medizin III

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 73 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

T2DM

  • Sex: male and female
  • HbA1c >=6.5 and <=11
  • Age >=18 and <=75 years
  • BMI>=25kg/m2
  • Metformin>=1000mg daily, 8 weeks stable dose Please note: Type 2 diabetes mellitus patients treated with less than 1000 mg metformin per day can only be included if the investigator considers the patient to be on the maximum tolerated dose and the investigator has documented the reason why uptitration to 1000 mg was not possible
  • able and willing to not change diet and physical activity during enrollment in study
  • consent and able to give informed consent.

Exclusion Criteria:

  • other diabetes diagnosis than T2DM
  • patients on other antidiabetic medication (Sulfonylurea, Glitazone, insulin for more than 2 weeks (see below), SGLT2 inhibitors, GLP1 agonist, nateglinide, repaglinide, acarbose, DPP4 inhibitors)
  • Subjects currently or previously treated with insulin (with the exception of emergency situations in which insulin was given for less than 14 consecutive days, but not within the last 3 months before screening)
  • known intolerance against study medication
  • Contraindications including hypersensitivity known to metformin according to the local label
  • recurrent urinary tract infections
  • GFR < 60
  • Liver enzymes above 3 fold normal range
  • Bilirubin higher 3 fold normal range
  • Any other clinical condition that would jeopardize patients safety while participating in this clinical trial
  • disease at screening (other than NAFLD) such as relevant cardiovascular, gastrointestinal, hepatic, neurologic, psychiatric, endocrine (i.e. pancreatic) except T2DM, hematologic, malignant, infection or other major systemic diseases making implementation of the protocol or interpretation of the study results difficult
  • history of pancreatitis
  • Known autoimmune disease or chronic inflammatory condition
  • Myocardial infarction or stroke within 6 months prior to screening
  • Blood dyscrasias or any disorders causing haemolysis or unstable Red Blood Cell (e.g.malaria, babesiosis, haemolytic anaemia)
  • Other liver disease including chronic viral hepatitis (B or C), alcohol abuse, hemochromatosis, alpha-1antitrypsin deficiency, autoimmune hepatitis, Wilson's disease, primary sclerosing cholangitis or primary biliary cirrhosis, or liver cirrhosis of any etiology
  • malignancy within the last 5 years before randomisation
  • medullary thyroid cancer
  • family history of multiple endocrine neoplasia syndrome
  • Alcohol or drug abuse within the 3 months prior to informed consent that would interfere with trial participation or any ongoing condition leading to a decreased compliance to study procedures or study drug intake
  • Presence of any absolute or relative contraindication for the conduct of an MRI investigation, such as cardiac pacemakers, ferromagnetic haemostatic clips in the central nervous system, metallic splinters in the eye, ferromagnetic or electronically operated active devices like automatic cardioverter defibrillators,cochlear implants, insulin pumps and nerve stimulators, prosthetic heart valves etc.
  • History of bariatric surgery
  • Treatment with anti-obesity drugs (e.g. sibutramine, orlistat) 3 months prior to informed consent or any other treatment at the time of screening (i.e. surgery, aggressive diet regimen, etc.) leading to unstable body weight
  • Subjects receiving antihypertensive medication and/or thyroid hormones, the dose(s) of which have not been stable for at least 6 weeks prior to baseline
  • Current treatment with systemic steroids at time of informed consent (Treatment with local and inhaled steroids is allowed)
  • Use of drugs potentially associated with NAFLD for more than 2 consecutive weeks in the 6 months prior to screening.
  • Use of anti-NASH drugs (thiazolidinediones, vitamin E, UDCA, SAM-e, betaine, milk thistle, anti-TNF therapies,) in the 3 months prior to randomization.
  • Donation of blood (> 400 mL) during the previous 3 months prior to the screening visit or during the duration of the study
  • Participation in another trial with an investigational drug within 30 days prior to informed consent.
  • Any subject who is the investigator or any coinvestigator, research assistant, pharmacist, study coordinator, other staff thereof, directly involved in the conduct of the protocol.
  • Pre-menopausal women (last menstruation ≤1 year prior to informed consent) who:
  • are nursing or pregnant or
  • are of child-bearing potential and are not practising an acceptable method of birth control, or do not plan to continue using this method throughout the study and do not agree to submit to periodic pregnancy testing during participation in the trial. Acceptable methods of birth control include tubal ligation, transdermal patch, intra uterine devices/systems (IUDs/IUSs), oral, implantable or injectable contraceptives,sexual abstinence,( if acceptable by local authorities) double barrier method and vasectomised partner.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Dapagliflozin & Exenatide
Dapagliflozin 10mg orally once daily & Exenatide 2mg subcutaneous once weekly
Exenatide will be combined with Dapagliflozin
Dapagliflozin, in both arms
Placebo Comparator: Dapagliflozin & Placebo
Dapagliflozin 10mg orally once daily & Exenatide matching Placebo 2mg subcutaneous once weekly
Dapagliflozin, in both arms
Exenatide matching Placebo will be combined with Dapagliflozin

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
change in hepatic lipid content measured with magnetic resonance spectroscopy in %
Time Frame: baseline - week 24
to investigate the effects on hepatic lipid content reduction of combination therapy with dapagliflozin (10mg daily) and exenatide (2mg weekly) compared to dapagliflozin (10mg daily) and placebo given for 24 weeks in patients with type 2 diabetes mellitus and insufficient glycaemic control despite oral therapy.
baseline - week 24

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
change in myocardial lipid content measured with magnetic resonance spectroscopy in %
Time Frame: baseline - week 24
to investigate the effects on myocardial lipid content reduction of combination therapy with dapagliflozin (10mg daily) and exenatide (2mg weekly) compared to dapagliflozin (10mg daily) and placebo given for 24 weeks in patients with type 2 diabetes mellitus and insufficient glycaemic control despite oral therapy.
baseline - week 24
change in pancreatic lipid content measured with magnetic resonance spectroscopy in %
Time Frame: baseline - week 24
to investigate the effects on pancreatic lipid content reduction of combination therapy with dapagliflozin (10mg daily) and exenatide (2mg weekly) compared to dapagliflozin (10mg daily) and placebo given for 24 weeks in patients with type 2 diabetes mellitus and insufficient glycaemic control despite oral therapy.
baseline - week 24
Number of participants with treatment-related adverse events as assessed by CTCAE v4.0
Time Frame: baseline- week 24
safety and tolerability from baseline to end by number of participants with treatment related AEs and SAEs
baseline- week 24
Quality of Life questionnaire
Time Frame: baseline - week 24
change from baseline in quality of live assessed by WHO Well Being Index
baseline - week 24
change in insulin resistance
Time Frame: baseline - week 24
change from baseline in insulin resistance assessed by HOMA IR Index
baseline - week 24
change in insulin sensitivity
Time Frame: baseline - week 24
change from baseline in insulin sensitivity assessed by OGIS
baseline - week 24
energy expenditure
Time Frame: baseline -week 24
change from baseline of energy expenditure assessed by indirect calorimetry
baseline -week 24
energy intake
Time Frame: baseline -week 24
change from baseline of energy intake assessed by 3 day eating protocols
baseline -week 24
blood pressure
Time Frame: baseline - week 24
To assess the effect of combination therapy with dapagliflozin and exenatide on blood pressure compared to dapagliflozin and placebo.
baseline - week 24
weight loss
Time Frame: baseline - week 24.
To assess the effect of combination therapy with dapagliflozin and exenatide on weight loss compared to dapagliflozin and placebo.
baseline - week 24.
change in glomerular filtration rate
Time Frame: baseline -week 24
change in GFR from baseline
baseline -week 24

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
weight
Time Frame: baseline - week 24
change in weight from baseline
baseline - week 24
hip circumference
Time Frame: baseline - week 24
change in hip circumference from baseline
baseline - week 24
waist circumference
Time Frame: baseline - week 24
change in waist circumference from baseline
baseline - week 24
fasting glucose
Time Frame: baseline - week 24
change in fasting plasma glucose from baseline
baseline - week 24
HbA1c reduction >= 0.5%
Time Frame: baseline - week 24
% of patient with HbA1c reduction of more than 0.5%
baseline - week 24
weight reduction >= 5%
Time Frame: baseline - week 24
% of patient with weight reduction of more than 5%
baseline - week 24
change in triglycerides
Time Frame: baseline - week 24
change in triglycerides from baseline
baseline - week 24
change in cholesterol
Time Frame: baseline - week 24
change in cholesterol from baseline
baseline - week 24

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Collaborators

Investigators

  • Principal Investigator: Alexandra Kautzky-Willer, Prof. Dr., Dep. of Medicine III, Div. of Endocrinology, Gender Medicine Unit

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 8, 2017

Primary Completion (Actual)

November 26, 2019

Study Completion (Actual)

January 16, 2020

Study Registration Dates

First Submitted

December 22, 2016

First Submitted That Met QC Criteria

December 28, 2016

First Posted (Estimate)

January 2, 2017

Study Record Updates

Last Update Posted (Actual)

April 15, 2022

Last Update Submitted That Met QC Criteria

April 8, 2022

Last Verified

April 1, 2022

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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