Impact of Body Weight and Weight Loss on Drug Bioavailability, Cardiovascular Risk Factors and Metabolic Biomarkers (COCKTAIL)
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|ClinicalTrials.gov Identifier: NCT02386917|
Recruitment Status : Active, not recruiting
First Posted : March 12, 2015
Last Update Posted : December 6, 2018
|Condition or disease||Intervention/treatment||Phase|
|Obesity||Procedure: Gastric bypass Behavioral: Very low calorie diet||Not Applicable|
This study aims to
- to investigate the relationship between body composition and the liver/intestine activity and expression of proteins (drug metabolizing enzymes, transporters and regulatory factors) important for drug bioavailability and disposition in the range from normal to morbid obesity (the combined gastric bypass and cholecystectomy groups) at baseline.
- to compare the short-term (6-week) and long-term (2 years) effect of gastric bypass (GBP) and a very low calorie diet (VLCD) (matched weight loss) on bioavailability and pharmacokinetics of probe drugs (caffeine, omeprazole, digoxin, midazolam, rosuvastatin, losartan) and biomarkers (and adjoining protein expressions) for cytochrome P450 (CYP)1A2, CYP2C9, CYP2C19, CYP3A, P-glycoprotein (gp) and organic anion-transporting polypeptide (OATP)1B1.
- to compare the 3 study groups (GBP, VLCD and cholecystectomy) at baseline with respect to body composition, cardiovascular risk factors and metabolic biomarkers.
- to compare the short-term (6-week) changes in glucose metabolism, blood pressure, blood lipids and body composition of matched weight loss and long-term effects (2 year) on body composition, cardiovascular risk factors and metabolic biomarkers, between the GBP and VLCD groups.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||100 participants|
|Intervention Model:||Parallel Assignment|
|Primary Purpose:||Basic Science|
|Official Title:||Impact of Body Weight, Low Calorie Diet and Gastric Bypass on Drug Bioavailability, Cardiovascular Risk Factors and Metabolic Biomarkers|
|Study Start Date :||March 2015|
|Estimated Primary Completion Date :||June 2019|
|Estimated Study Completion Date :||December 2019|
Active Comparator: Gastric bypass
40 patients will undergo gastric bypass
Procedure: Gastric bypass
Weight loss surgery
Active Comparator: Very low calorie diet
40 patients will undergo a very low calorie diet
Behavioral: Very low calorie diet
Non-surgical weight loss procedure
No Intervention: Gall bladder operation
20 patients will be asked to undergo one pharmacokinetic study only, and then finish the study. They will not undergo any weight loss intervention.
- Bioavailability of drugs (1) [ Time Frame: 0 hours and 0.25, 0.5, 1, 1.5, 2, 3, 4, 4.25, 4.5, 5, 5.5, 6, 8, 10*, 12*, 23 and 24 hours following administration ]Changes in absolute bioavailability (Area Under Curve - oral / Area Under Curve -intravenous) of midazolam after Gastric Bypass and Very Low Calorie Diet, respectively.
- Bioavailability of drugs (2) [ Time Frame: 0 hours and 0.25, 0.5, 1, 1.5, 2, 3, 4, 4.25, 4.5, 5, 5.5, 6, 8, 10*, 12*, 23 and 24 hours following administration ]Changes in bioavailability (Area Under Curve - oral) of caffeine, losartan, digoxin, rosuvastatin and omeprazole after Gastric Bypass and Very Low Calorie Diet, respectively.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02386917
|Tønsberg, Vestfold, Norway, 3103|
|Principal Investigator:||Jøran Hjelmesæth, Professor||The Hospital of Vestfold|