TOPAZE: Treatment for Opiate Addiction: Prognostic fActors of Responsiveness to Maintenance Treatment

Sponsor

Nantes University Hospital (Other)

Overall Status

Completed

CT.gov ID

NCT03729388

Collaborator

CSAPA Apsyades (Other), OPPELIA-Le triangle (Other)

Enrollment

Locations

Actual Duration (Months)

14.5

Patients Per Site

0.6

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

A global and integrative treatment of opioid-use disorders (OUD) with opiate maintenance therapy (OMT) and psychosocial interventions is recommended by all current guidelines. Treatment of OUD aim at prevents risks and consequences of opioid use (death by overdose, contamination with infectious diseases, mental and physical degradation, social exclusion and decrease of quality of life). OMT are approved since more than 20 years for OUD and a large number of patients have been treated. Nevertheless, identification of prognosis factors associated with good outcome is still limited. OMT duration, high dosages of OMT and patient good consistency have been identified as good prognosis factors but other individual factors could be involved and explain why OMT isn't as effective for all patients. The investigators assume that social environment, other addictive behaviors, psychiatric comorbidities, personality disorders and pharmacogenetics parameters might be of interest. Association between phenotype/ genotype, safety of OMT and therapeutic outcome will be especially assessed. For voluntary patients specific tools for risk reduction will be implemented (screening of infectious diseases with blood tests and fibrosis with fibroscan). Thus, the aim of TOPAZE study is to highlight prognosis factors for good outcome in the treatment of OUD moderate to severe at 12 months follow-up. Three main axes will be considered: clinical, pharmacological and pharmacogenetics.

Condition or Disease	Intervention/Treatment	Phase
Opioid-use Disorder	Other: Prognosis factor associated with good outcome.

Detailed Description

All patients with moderate or severe OUD diagnosis (according to Diagnostic and Statistical Manual Diploma in Social Medicine 5) who initiate OMT in addictionology department of Nantes hospital or in addiction care and prevention centers of Nantes could be included. Data will be collected during 3 visits.

During the first visit (inclusion), clinical interview, electrocardiogram, urinary and blood tests (pharmacokinetics and pharmacogenetics analysis) will be provided. Infectious disease screening and fibroscan could be also provided as the patient wishes. Inclusion visit will also correspond to initiation of OMT.

At 6 months follow-up (second visit) clinical interview, electrocardiogram, urinary and blood tests (pharmacokinetics and pharmacogenetics analysis) will be provided.

At 12 months follow-up (final visit) clinical interview, electrocardiogram and urinary test will be provided.

Study Design

Study Type:

Observational [Patient Registry]

Actual Enrollment :

29 participants

Observational Model:

Cohort

Time Perspective:

Prospective

Official Title:

Treatment for Opiate Addiction: Prognostic fActors of Responsiveness to Maintenance Treatment

Actual Study Start Date :

May 28, 2019

Actual Primary Completion Date :

May 28, 2021

Actual Study Completion Date :

May 28, 2021

Outcome Measures

Primary Outcome Measures

Clinical, pharmacokinetics and pharmacogenetics characteristics associated with good outcome of patients treated with OMT. [12 months]
Good outcome is defined as early remission of opioid-related disorder according to Diagnostic and Statistical Manual of Mental Disorders Fifth version (none of the diagnostic criteria except craving within last three months) and no initiation or worsening of other addictive behavior (substance use disorders or gambling disorder according to Diagnostic and Statistical Manual of Mental Disorders Fifth version within last 12 months).

Secondary Outcome Measures

Prevalence of good outcome after an OMT treatment initiation. [12 months]
Good outcome is defined as early remission of opioid-related disorder according to Diagnostic and Statistical Manual of Mental Disorders Fifth version (none of the diagnostic criteria except craving within last three months) and no initiation or worsening of other addictive behavior (substance use disorders or gambling according to Diagnostic and Statistical Manual of Mental Disorders Fifth version within last 12 months).
Reasons for dropping-out of treatment. [12 months]
Prevalence of each reason will be described (stopping treatment, death…).
Clinical characteristics of patients: history of psychoactive substance consumptions, psychiatric comorbidities and addictive behaviors, risky behaviors (intravenous administration, sharing equipment and sexual behavior). [12 months]
Number of participants with variation in the cytochrome P450 (CYP) enzyme with focus on CYP2B6, CYP2C19, CYP2D6, CYP3A4 polymorphisms using next-generation sequencing. [At inclusion]
Prevalence of CYP2B6, CYP2C19, CYP2D6 and CYP3A4 variants.
Pharmacokinetics of OMT elimination. [6 months]
Residual plasmatic concentration will be considered.
Number of participants with methadone-associated Q-T interval prolongation as assessed by electrocardiogram [safety]. [12 months]
Prevalence of methadone-associated Q-T interval prolongation.
Number of participants who accept to participate to a specific consultation with a hepatologist with a formation in risk reduction. [At inclusion]
Prevalence of participants who accept the hepatologist consultation and to be tested with blood tests for viral infections and fibroscan for hepatic fibrosis.
Number of participants with variation of the Permeability-glycoProtein (P-gP) using next-generation sequencing. [At inclusion]
Prevalence of P-gP variants.
Number of participants with variation in the OPRM1 gene (coding for µ receptor) using next-generation sequencing. [At inclusion]
Prevalence of OPRM1 variants.
Number of participants with urine tests results in accordance with a good compliance [compliance]. [At inclusion]
Prevalence of participants with positive urine tests results for OMT without any positive urine tests results for illicit substances or drugs without prescription.

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

Minimum age of 18 years
Initiation of treatment with OMT (methadone or buprenorphine) for an OUD moderate to severe (according to DSM 5) in Nantes Hospital addictionology department or in an addiction care and prevention centers in Nantes.
Affiliated to social security
Consent to participate