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Cocktail Approach for Cytochrome P450 and P-glycoprotein Activity Assessment Using Dried Blood Spot

NCT01731067 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 10

Last updated 2014-09-16

No results posted yet for this study

Summary

Phenotyping is an approach largely used for the evaluation of the activity of cytochromes and transporters in vivo. It consists of the administration of probe substances metabolised by a specific cytochrome or transported by P-glycoprotein (P-gp) for example, followed by the determination of a metabolic ratio or the evaluation of the plasmatic or urinary concentrations of the probe substances. The administration of a cocktail containing several probe substances allows the simultaneous evaluation of the activity of several cytochromes and P-gp in a single test.

The aim of this project is the validation of a phenotyping cocktail of low dose probe drugs for the assessment of cytochrome P450 and P-gp activities by simple capillary blood sampling and dried blood spot (DBS) analysis. The cocktail consists of caffeine, bupropion, flurbiprofen, omeprazole, dextromethorphan, midazolam and fexofenadine for the simultaneous phenotyping of CYP1A2, CYP2B6, CYP2C9, CAP2C19, CYP2D6, CYP3A4 and P-gp, respectively.

The modulation of the activity of cytochromes or P-gp will be evaluated by the administration of inhibitors (fluvoxamine, voriconazole, quinidine) or inducer (rifampicin) of the metabolic pathways or the P-gp mediated transport.

Conditions

  • Healthy Volunteers

Interventions

DRUG

Cocktail probe drugs

Sponsors & Collaborators

  • Jules Desmeules

    lead OTHER

Principal Investigators

  • Jules A Desmeules, Pr · University Hospital, Geneva

Study Design

Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2012-11-30
Primary Completion
2013-05-31
Completion
2014-01-31

Countries

  • Switzerland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01731067 on ClinicalTrials.gov