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Impact of Genetic Polymorphism on Drug-Drug Interactions Involving CYP2D6

NCT03054220 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 34

Last updated 2019-04-19

No results posted yet for this study

Summary

CYP2D6 is characterized by a huge variability in the general population, mainly because of genetic polymorphism and drug-drug interactions (DDIs). CYP2D6 genotype is known to have an impact on the extent of DDIs. Indeed several studies have pointed out differential DDIs extent according to CYP2D6 genotype. The terms phenoconversion and phenotype switch are both used to describe the phenomenon by which a given subject changes his phenotype to another due external influence such as DDIs. When given a sufficiently strong CYP2D6 inhibitor, the phenotype of an individual with no mutant allele (extensive metabolizer, EM) of CYP2D6 can be modified to a poor metabolizer (PM) phenotype. This vulnerability is also thought to be dependent on CYP2D6 genotype. Various combinations of alleles predict an EM genotype, which represents about 60 to 70% of the general population. The aim of the study is to determine whether the presence of genetic mutation in CYP2D6 has an impact on DDIs involving the CYP2D6 enzyme. Our interest focuses on CYP2D6 EM carriers of two fully functional alleles and carriers of one non-functional and one functional allele. In order to elucidate this question, CYP2D6 activity will be measured on healthy volunteers by administration of single low doses of dextromethorphan and tramadol in presence or not of duloxetine and paroxetine, two known CYP2D6 inhibitors.

Conditions

  • Healthy

Interventions

DRUG

Dextromethorphan 5 MG

DRUG

Tramadol 10 mg

DRUG

Duloxetine 60mg

DRUG

Paroxetine 20 mg

Sponsors & Collaborators

  • Jules Desmeules

    lead OTHER

Principal Investigators

  • Jules A Desmeules, Pr · HUG

Study Design

Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
60 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2016-07-31
Primary Completion
2018-12-31
Completion
2018-12-31

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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 NCT03054220 on ClinicalTrials.gov