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Purpose

This is a multi-center prospective comparative cohort study examining the safety, efficacy, pharmacokinetics, and pharmacogenomics of naltrexone for pregnant women with opioid use disorder. Pregnancy, delivery, and maternal and infant outcomes to 12 months post-delivery will be examined and compared with a cohort treated with buprenorphine/naloxone.

Conditions

Eligibility

Eligible Ages
Over 18 Years
Eligible Genders
Female
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Pregnant women between 6 - 30 6/7 weeks gestation, receiving prenatal care at Boston Medical Center (BMC) or the University of North Carolina (UNC) - Plan to deliver infant at BMC or UNC - Diagnosis of opioid use disorder (OUD) or alcohol use disorder (AUD) in the current pregnancy on prescribed oral or extended-release naltrexone; or buprenorphine/naloxone for the treatment of OUD - English speaking - Singleton pregnancy

Exclusion Criteria

  • OUD on prescribed methadone, or no maintenance medication - OUD on Subutex formulation of buprenorphine - Severe psychiatric illness or cognitively impairing ability to provide informed consent - Current maternal incarceration - Women who present for care >31 0/7 weeks - Multiple gestation pregnancy

Study Design

Phase
Study Type
Observational
Observational Model
Cohort
Time Perspective
Prospective

Arm Groups

ArmDescriptionAssigned Intervention
Naltrexone Pregnant women with opioid use disorder on prescribed oral or extended-release naltrexone and their infants. Biospecimens collected from this group will undergo pharmacokinetic analysis, genetic and epigenetic analysis, and breast milk analysis. This group will also receive safety and efficacy interventions.
  • Other: Pharmacokinetic analysis
    Pharmacokinetic analysis of maternal blood, maternal urine, cord blood, infant blood and urine for dyads in the naltrexone group at various time points in the pregnancy, at delivery, and 4 weeks postpartum.
  • Other: Safety and Efficacy
    Examination of the safety and efficacy of naltrexone and comparison of outcomes with the buprenorphine/naloxone cohort. Outcomes examined will include: 1) maternal outcomes (relapse, retention in care, preterm labor); 2) fetal outcomes (growth, fetal anomalies, fetal distress, cortisol levels); and 3) infant outcomes (NAS, growth, neurodevelopment via NNNS exam at 4 weeks and Bayley exam at 12 months of age).
  • Genetic: Genetic and epigenetic analysis
    Maternal blood and saliva DNA samples will be genotyped for single nucleotide polymorphisms in the mu opioid receptor gene (OPRM1) to look for associations with effectiveness of NTX and BPH. In addition, DNA methylation levels in the OPRM1 promoter within maternal and infant saliva and placenta at delivery and 4 weeks postpartum will be examined. Lastly, we will compare genome-wide DNA methylation levels at delivery and 4 weeks postpartum in mother-infant dyads.
  • Other: Breast milk analysis
    Mothers in the naltrexone group will have their breast milk analyzed at 4 weeks post-delivery for naltrexone levels, with corresponding maternal and infant plasma levels.
Buprenorphine/Naloxone Pregnant women with opioid use disorder on prescribed buprenorphine/naloxone and their infants. Biospecimens collected from this group will undergo genetic and epigenetic analysis and the group will also receive safety and efficacy interventions.
  • Other: Safety and Efficacy
    Examination of the safety and efficacy of naltrexone and comparison of outcomes with the buprenorphine/naloxone cohort. Outcomes examined will include: 1) maternal outcomes (relapse, retention in care, preterm labor); 2) fetal outcomes (growth, fetal anomalies, fetal distress, cortisol levels); and 3) infant outcomes (NAS, growth, neurodevelopment via NNNS exam at 4 weeks and Bayley exam at 12 months of age).
  • Genetic: Genetic and epigenetic analysis
    Maternal blood and saliva DNA samples will be genotyped for single nucleotide polymorphisms in the mu opioid receptor gene (OPRM1) to look for associations with effectiveness of NTX and BPH. In addition, DNA methylation levels in the OPRM1 promoter within maternal and infant saliva and placenta at delivery and 4 weeks postpartum will be examined. Lastly, we will compare genome-wide DNA methylation levels at delivery and 4 weeks postpartum in mother-infant dyads.
Naltrexone - alcohol use disorder Pregnant women with alcohol use disorder on prescribed naltrexone (oral or extended-release) and their infants. Biospecimens collected from this group will undergo pharmacokinetic analysis, genetic and epigenetic analysis, and breast milk analysis. This exploratory group will also receive safety and efficacy interventions.
  • Other: Pharmacokinetic analysis
    Pharmacokinetic analysis of maternal blood, maternal urine, cord blood, infant blood and urine for dyads in the naltrexone group at various time points in the pregnancy, at delivery, and 4 weeks postpartum.
  • Genetic: Genetic and epigenetic analysis
    Maternal blood and saliva DNA samples will be genotyped for single nucleotide polymorphisms in the mu opioid receptor gene (OPRM1) to look for associations with effectiveness of NTX and BPH. In addition, DNA methylation levels in the OPRM1 promoter within maternal and infant saliva and placenta at delivery and 4 weeks postpartum will be examined. Lastly, we will compare genome-wide DNA methylation levels at delivery and 4 weeks postpartum in mother-infant dyads.
  • Other: Breast milk analysis
    Mothers in the naltrexone group will have their breast milk analyzed at 4 weeks post-delivery for naltrexone levels, with corresponding maternal and infant plasma levels.

More Details

Status
Completed
Sponsor
Boston Medical Center

Study Contact

Detailed Description

Fifty pregnant women stabilized pre-pregnancy on oral or extended-release naltrexone (XR-NTX) and 50 comparison women on buprenorphine/naloxone (BPH) from Boston Medical Center and the University of North Carolina will be enrolled in this multi-center prospective comparative cohort study. The specific aims of this project are: 1) Safety and Efficacy: To compare maternal outcomes (safety, relapse, retention in care), fetal outcomes (growth, fetal distress), and infant outcomes (neonatal abstinence syndrome, growth, neurodevelopment) during pregnancy until 12 months post- delivery; An exploratory part of this aim is to collect safety and efficacy data on women receiving NTX for alcohol use disorder (AUD). We will collect maternal, fetal and infant outcomes related to prenatal alcohol exposure. 2) Pharmacokinetics: To determine the pharmacokinetics of NTX in pregnant and postpartum women; 3) Genetics and Epigenetics: To examine the association between genetic variants and epigenetic modification in the mu-opioid receptor (OPRM1) gene, as well as global DNA methylation changes after treatment with NTX and BPH within the mother, placenta, and infant; and 4) Breast milk: To measure breast milk concentrations of NTX and corresponding infant relative dose to determine safety for lactating women.

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.