About this trial
This 12-week randomized, double-blind, placebo-controlled trial will test the hypothesis that Vibegron (brand name GEMTESA) can improve energy metabolism, cardiometabolic risk factors, and physical and cognitive function in middle-aged and older adults with obesity.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Obese (BMI ≥30 kg/m2 or BMI ≥27 kg/m2 with a waist circumference >102 cm for men and >88 cm for women)
Disqualifiers
Body weight ≥450 pounds
Major depression
Evidence of cognitive impairment
Uncontrolled diabetes (hemoglobin A1c >7%)
Trial design
Parallel
Treatments tested in this trial
Vibegron
DrugA drug in a class of medications called beta-3 adrenergic agonists; approved for use with Overactive Bladder; 75mg tablets will be used in this study
Placebo
DrugTablets made of inert substance that looks like the vibegron tablets but has no therapeutic value
Treatment groups
Trial outcomes
Primary outcomes
Resting Metabolic Rate
Resting metabolic rate (RMR) will be measured by indirect calorimetry using a computerized metabolic cart that provides valid and reliable measurement of oxygen consumption and carbon dioxide production - RMR can be estimated using formulas such as the Mifflin-St Jeor equation: Males: RMR = 10 \* weight (kg) + 6.25 \* height (cm) - 5 \* age (years) + 5 Females: RMR = 10 \* weight (kg) + 6.25 \* height (cm) - 5 \* age (years) - 161
Resting Metabolic Rate
Resting metabolic rate (RMR) will be measured by indirect calorimetry using a computerized metabolic cart that provides valid and reliable measurement of oxygen consumption and carbon dioxide production - RMR can be estimated using formulas such as the Mifflin-St Jeor equation: Males: RMR = 10 \* weight (kg) + 6.25 \* height (cm) - 5 \* age (years) + 5 Females: RMR = 10 \* weight (kg) + 6.25 \* height (cm) - 5 \* age (years) - 161
Secondary outcomes
Glucose Tolerance Level
Glucose tolerance will be assessed using a standard 75-g oral glucose load to measure changes in glucose and insulin levels. Glucose tolerance will be defined as the 2-hour glucose level - a normal two-hour post-glucose level is below 140 mg/dL (7.8 mmol/L). Levels between 140 and 199 mg/dL (7.8 and 11 mmol/L) indicate impaired glucose tolerance (also called prediabetes), while levels of 200 mg/dL (11.1 mmol/L) or higher suggest diabetes.
Expanded Short Physical Performance Battery (eSPPB)
Lower extremity function will be assessed using the eSPPB which measures balance, gait speed, and leg strength - Each component is scored separately, and then the scores are summed to give a total score ranging from 0 (worst) to 12 (best) - The total score is calculated by summing the scores from the three subtests. A higher total score indicates better lower extremity function, while a lower score indicates more functional limitations.
Other outcomes
Core body temperature
Core body temperature will be measured continuously using a temperature monitoring patch worn on the chest.
Lipid levels
Plasma levels of total cholesterol, VLDL cholesterol, HDL cholesterol, and triglycerides will be measured in fasted blood samples.
Depressive Symptoms: 15-item Geriatric Depression Scale (GDS-15)
Questionnaire used to measure depressive symptoms in the elderly; ranges from 0-15 with higher scores indicating greater severity of depression; score of 0-4 is within normal range; score of 5-8 mild depression; score of 9-11 moderate depression; score of 12-15 severe depression
Quality of Life: Medical Outcomes Study Short Form 36 (SF-36)
Quality of life questionnaire with a score that ranges from 0 to 100 with higher scores indicating better quality of life.
Sponsors and contacts
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Wake Forest University Health Sciences
Lead sponsor
National Institute on Aging (NIA)
Collaborator
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