- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01845259
Does a GLP-1 Receptor Agonist Change Glucose Tolerance in Antipsychotic-treated Patients? (GREAT)
Does a GLP-1 Receptor Agonist Change Glucose Tolerance in Antipsychotic-treated Patients? A Randomized, Double-blinded, Placebo-controlled Clinical Trial
Study Overview
Status
Intervention / Treatment
Detailed Description
Statistical analyses:
Power calculation:
A sample size of 96 participants (48 in each group) was estimated, with two-sided t-testing, an α of 5% and a power of 90%. The power calculation was based on the primary outcome measurement: Change in glucose tolerance. The glucose tolerance was estimated by the total Area Under the Curve (AUC) following a 4-hour 75-g. Oral Glucose Tolerance Test (OGTT). The expected mean total AUC for the plasma glucose excursion following a 4-hour 75-g. OGTT was estimated as 1695 (SD 158) and 1800 (SD 158) after 16 weeks of treatment for the liraglutide and liraglutide placebo group, respectively. The difference in total AUC was based on unpublished data in individuals with and without Impaired Glucose Tolerance (IGT) following a 4-hour 75-g. OGTT at baseline from the study: "The Impact of Liraglutide on Glucose Tolerance and the Risk of Type 2 Diabetes in Women With Previous Pregnancy-induced Diabetes".(1)
Procedure:
All analyses will be carried out with the treatment groups still blinded and labeled as "treatment group A" and "treatment group B". Before dividing participants into group A and group B, the statistical plan was completed and uploaded on clinicaltrials.gov, and the data set was locked. The final unblinding of treatment groups (liraglutide or liraglutide placebo), will not be carried out until all statistical analyses are performed. All analyses will be performed using SAS 9.4, with α set at 0.05 and two-sided testing.
All efficacy analyses will be performed using a modified intention-to-treat principle. All participants who were randomized, received at least one dose of the trial compound (liraglutide or liraglutide placebo) and who had at least one assessment after baseline will be included in the efficacy analyses. All safety analyses will be performed in the intent-to-treat sample that includes all participants, who were randomized and received at least one dose of the trial compound (liraglutide or liraglutide placebo).
Primary endpoint:
The primary endpoint is the change in glucose tolerance following a 4-hour 75-g. OGTT from week 0 to week 16. During the 4-hour 75-g. OGTT, blood was sampled at fixed time points: -15, -10, 0, 5, 10, 15, 20, 30, 40, 50, 60, 90, 120, 150, 180, and 240 minutes. An analysis of covariance (ANCOVA) will be use to analyze change in glucose tolerance from week 0 to week 16 using mixed model analyses for the plasma glucose levels for the liraglutide and the liraglutide placebo group, respectively. In case of relevant baseline differences between the two groups, demographic, illness or treatment parameters will be included in the model as fixed effects together with the baseline value of the OGTTs as a covariate.
Secondary endpoints:
Blood was also sampled for analyses of C-peptide, glucagon and incretin hormones in response to the glucose load at the same fixed time points during the OGTT. Change in secretion of C-peptide, glucagon and incretin hormones from week 0 to week 16 will also be evaluated using mixed model ANCOVA analyses for the liraglutide and liraglutide placebo group, respectively. In case of relevant baseline differences between the two groups, demographic, illness or treatment parameters will be included in the model as fixed effects together with the baseline value of the relevant variable as a covariate.
Most secondary endpoints were repeated every 4 weeks. Few secondary endpoints were only repeated at week 0 and 16. For all repeated measurements a mixed model ANCOVA analyses will be use to analyze mean change in continuous outcomes from week 0 to week 16 for the liraglutide and the liraglutide placebo group, respectively. In case of relevant baseline differences between the two groups, demographic, illness or treatment parameters will be included in the model as fixed effects together with the baseline value of the relevant variable as a covariate. Change in categorical outcomes from week 0 to week 16 will be analyzed using mixed model logistic regression with the same fixed effects and covariates as described for the continuous outcomes.
For secondary endpoints without repeated measurements, missing data imputations will be made using Multiple Imputation of Chained Equations (MICE).
For continuous outcomes without repeated measurements, outcomes will be analyzed using ANCOVA to detect differences between the liraglutide and the liraglutide placebo group. In the model baseline demographic, illness or treatment parameters will be included. Categorical outcomes without repeated measurements will be analyzed using a multiple mixed effect logistic regression analysis model, where baseline demographic, illness or treatment parameters will be included.
Subgroup and sensitivity analyses:
Subgroup and sensitivity analyses will be performed to assess the robustness of the primary analyses. These analyses will be performed using regression analysis for continuous outcomes and logistic regression for categorical outcomes. The analyses will consider clinically or mechanistically relevant baseline and intra-treatment variables, including:
- Gender
- Smoking
- Antipsychotics (clozapine vs olanzapine; monopharmacy vs polypharmacy with other antipsychotic medications)
- Lipid profile
- Liver function
Different groups of dysglycaemia:
- HbA1c: 43 mmol/mol ≤ HbA1c ≤ 47 mmol/mol, vs
- Impaired fasting glucose (IFG): Fasting plasma glucose (FPG): 6.1 mmol/l ≤ FPG ≤ 6.9 mmol/l and HbA1c < 48 mmol/mol, vs
- Impaired glucose tolerance (IGT): two-hour plasma glucose after 75-g oral glucose tolerance test >7.8 mmol/l with a FPG < 7.0 mmol/l and HbA1c < 48 mmol/mol
- IGT < 11 mmol/l vs IGT >11 mmol/l
- Liraglutide treatment (1.2 mg vs 1.8 mg liraglutide)
- Weight
- Add-on psychotropic drugs/classes (antidepressants, anxiolytics etc. vs no add-on)
- Antihypertensive treatment vs no antihypertensive treatment
- Lipid lowering treatment vs no lipid lowering treatment
- Changes in antipsychotic medication (> 20 % change in dose vs < 20 % change in dose vs no changes in dose for clozapine or olanzapine, respectively)
- Inhalation steroid vs no inhalation steroid
- Body composition
- Insulin resistance
- Beta-cell function
- Incretin hormones
- Psychopathologic rating scales
- Alcohol consumption
- Length of disease
- Diagnosis (schizophrenia vs schizotypal disorder vs paranoid psychosis)
- Side effects
- Serious adverse events
Reference List
1. Foghsgaard S, Vedtofte L, Mathiesen ER et al. The effect of a glucagon-like peptide-1 receptor agonist on glucose tolerance in women with previous gestational diabetes mellitus: protocol for an investigator-initiated, randomised, placebo-controlled, double-blinded, parallel intervention trial. BMJ Open 2013;3(10):e003834.
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
-
-
København Ø
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Copenhagen, København Ø, Denmark, 2100
- Psychiatric Centre Rigshospitalet
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Informed oral and written consent
- Diagnosed with schizophrenia, schizotypal disorder or paranoid psychosis according to the criteria of ICD10 (International Classification of Diseases, World Health Organization) or the DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, the American Psychiatric Association)
- and on stable antipsychotic treatment with either clozapine or olanzapine for at least 6 months (without dose change for at least 30 days)
- Stable co-medications for at least 30 days.
- Age ≥18 years and ≤65 years
- Stable weight (defined as less than 5% change in weight over the last 3 month before inclusion)
- BMI ≥27 kg/m2
- Dysglycaemia (IFG, i.e. fasting plasma glucose level from 6.1 mmol/L to 6.9 mmol/L or IGT, i.e. two-hour glucose levels > 7.8 mmol/L on the 75-g oral glucose tolerance test with a fasting plasma glucose of less than 7.0 mmol/L and HbA1c < 48 mmol/mol or HbA1c: 43 mmol/mol ≤ HbA1c ≤ 47 mmol/mol)
Exclusion Criteria:
- Compulsory treatment
- Females of child bearing potential who are pregnant, breast-feeding or have intention of becoming pregnant or are not using adequate contraceptive measures
- Subjects treated with corticosteroids or other hormone therapy (except estrogens)
- Any active substance abuse or dependence for the past 6 months (except for nicotine)
- Impaired hepatic function (liver transaminases >2 times upper normal limit)
- Impaired renal function (se-creatinine >150 μM and/or macroalbuminuria)
- Impaired pancreatic function (acute or chronic pancreatitis and/or amylase >2 times upper normal limit)
- Cardiac problems defined as decompensated heart failure (NYHA class III or IV), unstable angina pectoris and/or myocardial infarction within the last 12 months
- Uncontrolled hypertension (systolic blood pressure >180 mmHg, diastolic blood pressure >100 mmHg)
- Any condition that the investigator feels would interfere with trial participation
- Receiving any investigational drug within the last 3 months
- Use of weight-lowering pharmacotherapy within the preceding 3 month
- Type 1 or 2 diabetes with HbA1c > 6.5%
Also a group of healthy controls (n=10) will have the baseline examinations done. The healthy controls will be matched to our participants in regards to gender, BMI and age. The same inclusion and exclusion criteria will apply for these controls, except these participants are not allowed to have known psychiatric illness, receive anti-psychotic medications, or have a family history of type 2 diabetes (2 generations).
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: QUADRUPLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Liraglutide
Once a day 1,8 mg subcutaneous injection for 16 weeks
|
Once a day 1,8 mg subcutaneous injection for 16 weeks
Other Names:
|
PLACEBO_COMPARATOR: Liraglutide placebo
Once a day 1,8 mg subcutaneous injection for 16 weeks
|
Once a day 1,8 mg subcutaneous injection for 16 weeks
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Glucose tolerance
Time Frame: Baseline - 16 weeks
|
Change in Glucose tolerance (measured by area under the curve (AUC) for plasma glucose (PG) excursion following a 4-hour 75 g Oral Glucose Tolerance Test (OGTT))
|
Baseline - 16 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Dysglycaemia
Time Frame: Baseline - 16 weeks
|
Change in dysglycaemia (Impaired Fasting Glucose (IFG), Impaired Glucose Tolerance (IGT), combined IFG/IGT or diabetes)
|
Baseline - 16 weeks
|
Body weight
Time Frame: Every 4 weeks from baseline - 16 weeks
|
Every 4 weeks from baseline - 16 weeks
|
|
Secretion of incretin hormons, insulin sensitivity and beta cell function
Time Frame: Baseline - 16 weeks
|
Evaluated by Homeostatic Model of Assessment (HOMA)
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Baseline - 16 weeks
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Body composition
Time Frame: Baseline - 16 weeks
|
Dual energy x-ray absorptiometry (DEXA)-scan
|
Baseline - 16 weeks
|
Lipid profile and liver function
Time Frame: Every 4 weeks from baseline - 16 weeks
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Blood sample
|
Every 4 weeks from baseline - 16 weeks
|
Psychopathology
Time Frame: Baseline - 16 weeks
|
Schizophrenia Quality of Life Scale (SQLS), Clinical Global Impression-Severity (CGI-S), Clinical Global Impression-Improvement (CGI-I), Global Assessment of Function (GAF)
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Baseline - 16 weeks
|
Waist circumference
Time Frame: Every 4 weeks from baseline - 16 weeks
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Every 4 weeks from baseline - 16 weeks
|
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Blood pressure
Time Frame: Every 4 weeks from baseline - 16 weeks
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Every 4 weeks from baseline - 16 weeks
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Alcohol use
Time Frame: Every 4 weeks from baseline - 16 weeks
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AUDIT (Alcohol Use Disorder Identification Test)
|
Every 4 weeks from baseline - 16 weeks
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Changes i dietary and exercise records
Time Frame: Every 4 weeks from baseline - 16 weeks
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Every 4 weeks from baseline - 16 weeks
|
|
Proteomic fingerprinting
Time Frame: Every 4 weeks from baseline - 16 weeks
|
We wish to identify baseline imbalances among our participants with proteomic fingerprinting.
Furthermore, we will test the dysglycemic and metabolic disturbances in patients treated for 16 weeks with liraglutide or placebo.
We wish to investigate, whether treatment with liraglutide possible could rebalance some of the metabolic, immune and hormonal disturbances, we expect to find at baseline.
|
Every 4 weeks from baseline - 16 weeks
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Long term follow-up 52 weeks after end of participation
Time Frame: 52 weeks after 16 weeks of liraglutide/placebo-treatment
|
The follow-up 52 weeks after end of participation will include: • Medical history: Changes in antipsychotic medication Changes in other medications Changes in diet and exercise habits Changes in smoking Diagnosed with diabetes or other diseases
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52 weeks after 16 weeks of liraglutide/placebo-treatment
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Baseline comparisons with healthy controls (non-psychiatric, non-diabetic)
Time Frame: Baseline examination
|
In order to identify risk factors for diabetes development in individuals on antipsychotic medications, the baseline examinations will be performed on a group of healthy controls without psychiatric illnes or pre-diabetes (n=10).
The healthy controls will be matched to our participants in regards to gender, age and BMI.
|
Baseline examination
|
Collaborators and Investigators
Investigators
- Principal Investigator: Tina Vilsbøll, MD, DMSci, Diabetes Research Division, Gentofte
Publications and helpful links
General Publications
- Larsen JR, Vedtofte L, Jakobsen MSL, Jespersen HR, Jakobsen MI, Svensson CK, Koyuncu K, Schjerning O, Oturai PS, Kjaer A, Nielsen J, Holst JJ, Ekstrom CT, Correll CU, Vilsboll T, Fink-Jensen A. Effect of Liraglutide Treatment on Prediabetes and Overweight or Obesity in Clozapine- or Olanzapine-Treated Patients With Schizophrenia Spectrum Disorder: A Randomized Clinical Trial. JAMA Psychiatry. 2017 Jul 1;74(7):719-728. doi: 10.1001/jamapsychiatry.2017.1220.
- Sharma AN, Ligade SS, Sharma JN, Shukla P, Elased KM, Lucot JB. GLP-1 receptor agonist liraglutide reverses long-term atypical antipsychotic treatment associated behavioral depression and metabolic abnormalities in rats. Metab Brain Dis. 2015 Apr;30(2):519-27. doi: 10.1007/s11011-014-9591-7. Epub 2014 Jul 15.
- Larsen JR, Vedtofte L, Holst JJ, Oturai P, Kjaer A, Correll CU, Vilsboll T, Fink-Jensen A. Does a GLP-1 receptor agonist change glucose tolerance in patients treated with antipsychotic medications? Design of a randomised, double-blinded, placebo-controlled clinical trial. BMJ Open. 2014 Mar 25;4(3):e004227. doi: 10.1136/bmjopen-2013-004227. Erratum In: BMJ Open. 2015;5(5):e004227corr1. Corell, Christoph U [corrected to Correll, Christoph U].
Study record dates
Study Major Dates
Study Start
Primary Completion (ACTUAL)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ESTIMATE)
Study Record Updates
Last Update Posted (ESTIMATE)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- GLP-1 antipsychotics
- 2013-000121-31 (EUDRACT_NUMBER)
- U1111-1128-3404 (REGISTRY: UTN-number)
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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