Drug-drug Interaction Study in Healthy Male Volunteers Following the Administration of Pantoprazole and Rosuvastatin

Centre hospitalier de l'Université de Montréal (CHUM)

Status and phase

Completed

Phase 1

Conditions

Drug Interaction Potentiation

Treatments

Drug: Rosuvastatin, Pantoprazole

Study type

Interventional

Funder types

Other

Identifiers

NCT01146483

CE 09.252

Details and patient eligibility

About

This is a single-center, randomized, 2-period, 2-sequence, cross-over study.

Full description

Background:

Notions used to describe drug disposition are being reviewed as the roles of drug membrane transporters are being discovered. In the near past, simple biophysical principles - lipophilicity and passive diffusion - were used to explain drug absorption, distribution and elimination. Today, with more than 367 genes known in humans, membrane transporters occupy a much central role.

Rational:

Drug influx/efflux transporters are expressed in various organs with variable activities and their presence increases (influx) or decreases (efflux) the intracellular concentration of a drug in a specific organ. Therefore, intersubject variability in the activity of these transporters due to genetic polymorphisms or concomitant drug treatments can explain intersubject variability in drug actions.

Rosuvastatin is an HMG-CoA reductase inhibitor and a substrate of OATPs and BCRP. There is not much information on the transporter-mediated disposition of rosuvastatin. Literature suggests that rosuvastatin is a transporter substrate of the influx OATP1B1, 1B3 and 2B1 as well as the efflux BCRP. The efflux of rosuvastatin by BCRP would be of major importance in the hepatocytes. BCRP would be responsible of the excretion of 30% of the unchanged drug in the bile. To confirm this hypothesis and identify patients at risk of toxicity with rosuvastatin, we want to perform a drug-drug interactions study with an inhibitor of BCRP namely, pantoprazole. With this approach, we will confirm if rosuvastatin is a real substrate of BCRP as suggested in the literature.

Methodology:

To determine changes induced by the administration of pantoprazole on the pharmacokinetics of rosuvastatin in healthy volunteers 16 healthy volunteers will be administered a single dose of rosuvastatin with and without (placebo) pantoprazole.

Urine and plasma analysis will be performed by LC-MSMS. Pharmacokinetics analysis will be performed. Plasma and urine concentrations of rosuvastatin will be analysed using a noncompartmental method. Pharmacokinetic parameters calculated in this study will be Cmax, Tmax, AUC0-72, AUC0-∞, Kel, T1/2β, CL/F, CLr, and Ae.

Enrollment

16 patients

Sex

Male

Ages

18 to 55 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Vital Signs, EKG and Clinical Laboratory Values within the normal range
Body mass index (BMI) [20-29kg/m2]
Caucasian male
Age between [18-55]
Healthy by physical exam
Non or ex-smoker

Exclusion criteria

Presence or history of intolerance or hypersensibility to proton pump inhibitors or HMG-CoA reductase inhibitors.
Significant illness. History of cardiovascular, kidney, liver or gastrointestinal disease. Presence of cardiovascular, pulmonary, hematologic, neurologic, psychiatric, endocrine, immunologic or dermatologic disease.
consumption of an investigational product or donation of blood in the previous 28 days preceding the study.