Saxenda: Underlying Mechanisms and Clinical Outcomes

Study Overview
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Brief Summary
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The purpose of this protocol is to investigate the effect of treatment with the study drug Liraglutide, a GLP-1 receptor agonist, on centers of the brain that control appetite and food intake.

Detailed Description
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The effect of treatment with the study drug Liraglutide, a recently discovered GLP-1 receptor agonist, on centers of the brain that control appetite and food intake will be studied in detail.

Official Title
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Saxenda: Underlying Mechanisms and Clinical Outcomes

Conditions
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Obesity

Intervention / Treatment
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* Drug: liraglutide
* Other: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Obese: BMI> 30 kg/m2 or >27 kg/m2 with comorbidities (including but not limited to insulin resistance, hypertension, dyslipidemia, cardiovascular disease, stroke, sleep apnea, gallbladder disease, hyperuricemia and gout, and osteoarthritis). Exclusion Criteria: Women who are breastfeeding, pregnant, or wanting to become pregnant. Women using metal IUD Any change in the dosage of hormonal contraceptive medications (birth control pills, implanon). Subjects should remain on same medication/ same dose during the time of the entire study. Moderate (creatinine clearance of 30-59 ml/min) and severe renal impairment (creatinine clearance below 30 ml/min) and end-stage renal disease Moderate, or severe hepatic impairment Hypersensitivity to the active substance or any of the excipients in liraglutide History of diabetic ketoacidosis Congestive heart failure EKG abnormalities (as listed above) Inflammatory conditions like inflammatory bowel disease, Rheumatoid arthritis etc Gastroparesis Pancreatitis Gallstones- as they may cause increased risk of pancreatitis Alcohol consumption- the maximum quantity for men is 140g-210g per week. For women, the range is 84g-140g per week or drinking as consuming no more than two drinks a day for men and one for women. Alcohol can cause increased risk of pancreatitis and hypoglycemia. Untreated thyroid disease like hypothyroidism or hyperthyroidism Subjects taking the following medications: warfarin, steroids (inhaled or systemic due to reduced hypoglycemic effect), and subjects on other hormones (LHRH analogs etc). Subjects on any oral anti-diabetic agent except metformin Personal or family history of MEN II or medullary thyroid cancer Subjects with any type of bioimplant activated by mechanical, electronic, or magnetic means (e.g. cochlear implants, pacemakers, neuron or biostimulators, electronic infusion pumps, etc.) Subjects with any type of metallic implant that could potentially be displaced or damaged during MRI, such as aneurysm clips, metallic skull plates, surgical implants etc. or metal containing tattoos Anxiety of small spaces and/or claustrophobia Uncontrolled cardiac impairment, circulatory impairment, or inability to perspire (poor thermoregulatory function) Significant sensory or motor impairment Epilepsy, particularly photo-sensitive epilepsy, which may place the individual at a higher risk for adverse events during fMRI scanning with visual stimulation Subjects with neurological or psychological problems which may interfere with or complicate testing (e.g. presence of titubation) Body weight above the limitation of the MRI scanning table (330lbs/150 Kg) or body dimensions that could difficult the performance of the scan. Subjects who cannot adhere to the experimental protocol for any reason Anemia with Hgb less than 10 Uncontrolled infectious diseases (e.g. HIV, hepatitis, chronic infections etc) Any uncontrolled endocrine condition, e.g Cushing's, Acromegaly, etc Any cancers or lymphoma Eating disorders like anorexia, bulimia Severe hypertriglyceridemia (triglycerides >500 mg/dl) Weight loss surgery or gastrectomy Any changes in medications that affect brain function, e.g. anti-depressants, anti-psychotics, anti-anxiety, anti-seizure medications, antihypertensives etc (subjects should remain on same medication/ same dose during the time of the entire study). Vegetarians- as food images presented will include numerous non-vegetarian items and thus will not be appealing as high calorie food items. Suicidality, as measured by the MSSI at screening visit.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 100 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Liraglutide followed by placebo<br>Participants will receive liraglutide with dose titration over 5 weeks (0.6mg for 1 week, 1.2mg for 1 week, 1.8mg for 1 week, 2.4mg for 1 week, and 3.0mg for 1 week) followed by a minimum of 3 weeks wash-out and then return for the same dose of placebo for the same amount of time. | Drug: liraglutide<br> <br> * Other names: Saxenda;Other: Placebo<br> <br> |
| Experimental: Placebo followed by liraglutide<br>Participants will receive placebo with dose titration (0.6mg for 1 week, 1.2mg for 1 week, 1.8mg for 1 week, 2.4mg for 1 week, and 3.0mg for 1 week) followed by a minimum of 3 weeks wash-out and then return for the same dose of liraglutide for the same amount of time. | Drug: liraglutide<br> <br> * Other names: Saxenda;Other: Placebo<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| BOLD response to food cues | effect size of BOLD response to food cues in the brain | 5 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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MRI, Brain, Liraglutide