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Objective: Prior research demonstrated that the δ-opioid receptor (OPRD1) rs678849 variant influences opioid use in African Americans treated with methadone. We examined whether this variant moderated cocaine and opioid use in our clinical cohort of methadone and disulfiram treated recipients.
Methods: Cocaine and opioid codependent patients were stabilized for 2 weeks on methadone and subsequently randomized into groups treated with either methadone + placebo (n = 37) or methadone + disulfiram (250 mg/day; n = 33) for 12 weeks.
Results: A drop in cocaine-positive urine was found in the OPRD1 CC genotype group compared to T-allele carrier patients treated with methadone + disulfiram (P < 0.0001), but not in the methadone + placebo group. No difference in opioid-positive urines was found among each genotype group in either treatment group.
Conclusion: These findings suggested that rs678849 genotype may predict treatment response of disulfiram for cocaine use in patients with co-occurring opioid and cocaine dependence.
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http://dx.doi.org/10.1097/YPG.0000000000000279 | DOI Listing |
Environ Toxicol Pharmacol
June 2023
Ankara Training and Research Hospital AMATEM Clinic, Ankara, Turkiye.
This study aimed to determine the effects of nine OPRM1, OPRD1 and OPRK1 polymorphisms on plasma BUP and norbuprenorphine (norBUP) concentrations and various treatment responses in a sample of 122 patients receiving BUP/naloxone. Plasma concentrations of BUP and norBUP were detected by LC-MS/MS. PCR-RFLP method was used to genotype polymorphisms.
View Article and Find Full Text PDFAm J Drug Alcohol Abuse
September 2021
Department of Psychiatry, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Background: The functional mechanism is unknown for many genetic variants associated with substance use disorder phenotypes. Rs678849, an intronic variant in the delta-opioid receptor gene (), has been found to predict regional brain volume, addiction risk, and the efficacy of buprenorphine/naloxone in treating opioid use disorder. The variant has also been implicated as an expression quantitative trait locus (eQTL) for several genes.
View Article and Find Full Text PDFPsychiatr Genet
June 2021
The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine.
Objective: Prior research demonstrated that the δ-opioid receptor (OPRD1) rs678849 variant influences opioid use in African Americans treated with methadone. We examined whether this variant moderated cocaine and opioid use in our clinical cohort of methadone and disulfiram treated recipients.
Methods: Cocaine and opioid codependent patients were stabilized for 2 weeks on methadone and subsequently randomized into groups treated with either methadone + placebo (n = 37) or methadone + disulfiram (250 mg/day; n = 33) for 12 weeks.
Pharmacogenomics J
April 2021
Emergency Medicine, Medical Toxicology, Addiction Medicine, Rutgers New Jersey Medical School, Newark, NJ, USA.
Buprenorphine is an effective treatment for opioid dependence; however, it demonstrates individual variability in efficacy. Pharmacogenomics may explain this drug response variability and could allow for tailored therapy on an individual basis. The Food and Drug Administration and the Clinical Pharmacogenomics Implementation Consortium have guidelines on pharmacogenomic testing for some opioids (e.
View Article and Find Full Text PDFPharmacogenomics J
June 2019
Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Many patients with opioid use disorder do not have successful outcomes during treatment but the underlying reasons are not well understood. An OPRD1 variant (rs678849) was previously associated with methadone and buprenorphine efficacy in African-Americans with opioid use disorder. The objective of this study was to determine if the effect of rs678849 on opioid use disorder treatment outcome could be replicated in an independent population.
View Article and Find Full Text PDF