- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04249674
Impact of CYP2D6 Genetic Polymorphisms on the Vulnerability to Drug-drug Interactions With Tramadol (PREDICT)
Impact of CYP2D6 Genetic Polymorphism on the Vulnerability to Drug-drug Interactions With Tramadol: a Gene-environment Interaction and Phenoconversion Study on Patients Undergoing a Steady Treatment With a Potent CYP2D6 Inhibitor.
Despite its poor abundance in the liver, CYP2D6 is the second most important CYP in drug metabolism, metabolizing 20% of drugs. The high inter-individual variability in CYP2D6 expression is explained by genetic variations, but also by drug-drug interactions (DDIs). Recent studies have pointed out the poor therapeutic predictable value of DDI. Indeed, the clinical outcomes of a DDI may involve several intrinsic factors affecting the vulnerability to and extent of DDI, such as genetic polymorphisms, comorbidities, age and sex.
In this regard, the present research project aims to investigate the effect of genetic polymorphism on DDIs involving CYP2D6 (gene-environment interaction) and its implications for tramadol efficacy and safety in a clinical setting. In a previous study, we demonstrated differences in both the rate of phenoconversion and the magnitude of DDI in healthy volunteers, that were either heterozygote normal metabolizers (NMs) carrying a non-functional CYP2D6 allele (activity score (AS) 1) and homozygous NM carrying two fully-functional CYP2D6 alleles (AS 2).
This prospective study will include patients scheduled for a general surgery of less than 3 hours and planned to be treated with oral tramadol as a routine post-operative pain management.
Patients taking part in the study may receive diagnosis, therapeutic or other interventions but the groups of individuals (controls vs inhibited) are predefined based on the routine treatment of the patients.
There will be no assigned specific interventions to the study participants and CYP2D6 phenotypes will be classified in five activity score groups (0.5, 1, 1.5, 2, >2) in the absence or presence of a potent CYP2D6 inhibitor received as part of routine medical care.
PK of tramadol and its active metabolite (M1), as well as its analgesic and PD effects and safety, will be compared between groups. Finally, the data generated will be used to build a physiologically-based PK (PBPK) model for tramadol in different sub-groups. The model will aim to predict the effect of CYP2D6 inhibition in virtual populations with different genetically-related CYP2D6 activities. This should allow prospective dose adjustment of tramadol (or appropriate drug selection) based on patients' genotype in the presence of a CYP2D6 inhibitor.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Caroline Samer, Doctor
- Phone Number: 022 372 99 47
- Email: caroline.samer@hcuge.ch
Study Locations
-
-
-
Genève, Switzerland
- Recruiting
- Geneva University Hospitals, HUG
-
Contact:
- Caroline Samer, Dr
- Email: caroline.samer@hcuge.ch
-
Contact:
- Kenza Abouir
- Email: kenza.abouir@hcuge.ch
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Patients will be recruited through a pre-surgery anesthetic evaluation visit. During their scheduled visit with an anaesthesiologist, potential patients will be invited to participate to an information session where project aim and design, procedures involved, expected duration as well as possible risks will be explained in details.
After sufficient time of reflection, volunteers willing to participate in the study will sign the consent form.
Description
Inclusion Criteria:
- Any male and female patients > 18 years scheduled for a surgery of less than 3 hours duration and planned to be treated with oral tramadol as a routine management of post-operative pain;
- Patients with physical conditions classified as ASA I to III, based on American Society of Anesthesiology classification;
- Patients treated chronically with a potent CYP2D6 inhibitor (for CYP2D6-inhibited arms only);
- Understanding of French language and able to give a written inform consent
Exclusion Criteria:
- Pregnant or breastfeeding woman
- Any pathologies, use of drugs or food that may affect CYP activity (for control arms only and based on the 'drug interactions and cytochromes P450' table published by The Service of clinical Pharmacology and Toxicology [3], HUG and on the investigator's knowledge)
- Liver transplantation history
- Sensitivity to dextromethorphan (CYP2D6 probe drug) or any contra-indication to dextrometorphan
- Medical history of cirrhosis (Child Pugh B and C) or/and hepatosteatosis.
- Glomerular filtration rate (GFR) < 30 ml/min/1.73m2
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Patient under a CYP2D6 inhibitor and under Tramadol
|
Administration of 4 ml=10 mg of Dextrometorphan (Bexine sirup)
Single nucleotide polymorphism determination
|
Patient not under a CYP2D6 inhibitor but under Tramadol
|
Administration of 4 ml=10 mg of Dextrometorphan (Bexine sirup)
Single nucleotide polymorphism determination
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Assess the proportion of patients in each group who acquires a phenotype switch (phenoconversion) with or without CYP2D6 inhibitor.
Time Frame: 10 hours
|
10 hours
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Comparison of Tramadol , Dexrometorphan and their metabolites maximum plasma concentration (Cmax) according to patient belonging to the control or inhibited group.
Time Frame: 24 hours
|
24 hours
|
Comparison of Tramadol, Dextrometorphan and their metabolites Area Under the curve (AUC) according to patient belonging to the control or to the inhibited group and to his CYP2D6 phenotype
Time Frame: 24 hours
|
24 hours
|
Comparison of Tramadol, Dextrometorphan and their metabolites Clearance (CL) according to patient belonging to the control or to the inhibited group.
Time Frame: 24 hours
|
24 hours
|
Other Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Urinary metabolic ratio (UMR) tramadol/M1 in urine collection
Time Frame: 8 hours
|
8 hours
|
Saliva metabolic ratio tramadol/M1
Time Frame: 2 hours
|
2 hours
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Youssef Daali, Pr., University Hospital, Geneva
- Principal Investigator: Caroline Samer, Doctor, University Hospital, Geneva
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 2019-01418
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Pain
-
Flowonix MedicalApproved for marketingBack Pain | Leg Pain | Trunk Pain | Intractable Pain | Arm Pain
-
University Hospital Schleswig-HolsteinZealand University Hospital; European Regional Development Fund; Design School...CompletedPain, Acute | Pain, Chronic | Pain Measurement | Pain, CancerGermany
-
Universitat Jaume ICompletedPain, Acute | Pain, Chronic | OncologySpain
-
Dow University of Health SciencesRecruitingLow Back Pain | Chronic Low-back Pain | Low Back Pain, Mechanical | Mechanical Low Back Pain | Pain, Chronic | Pain, Back | Lower Back Pain Chronic | CLBP - Chronic Low Back PainPakistan
-
Dr. Negrin University HospitalCompletedPostoperative Pain, Acute | Postoperative Pain, ChronicSpain
-
George Washington UniversityRecruitingCervical Fusion | Pain, Back | Pain, Neck | Myofacial PainUnited States
-
University of Campinas, BrazilCompletedPREGNANCY | LUMBAR BACK PAIN | PELVIC PAIN
-
Atatürk Chest Diseases and Chest Surgery Training...RecruitingPostoperative Pain | Postoperative Pain, Acute | Postoperative Pain, Chronic | VATSTurkey
-
Janssen Research & Development, LLCCompletedPain, Radiating | Pain, Burning | Pain, Crushing | Pain, Migratory | Pain, SplittingUnited States, France, Spain, Poland, Portugal
-
susanne beckerSNSFCompletedLow Back Pain | Pain, Acute | Pain, ChronicSwitzerland