Opioid exposure on the preterm brain: qualitative and quantitative MRI analysis

Area of Science:

• Neonatal neuroscience
• Developmental pediatrics
• Neuroimaging

Background:

• Opioid exposure in neonatal intensive care units (NICUs) is common for preterm infants.
• The impact of neonatal opioid exposure on neurodevelopmental outcomes requires further investigation.
• The role of early brain MRI measures in modifying this association is unclear.

Purpose of the Study:

• To determine if neonatal opioid exposure affects neurodevelopmental outcomes in preterm infants.
• To assess if early qualitative (lesions) or quantitative (volumetric) brain MRI measures modify this association.

Main Methods:

• Retrospective cohort study of 280 preterm infants (≤30 weeks gestation).
• Brain MRI at ~30 weeks postmenstrual age (PMA) for injury scoring and volumetric analysis.
• Neurodevelopmental assessment at ages 2 (Bayley-III) and 5 (WPPSI-III, M-ABC-2).
• Multivariable regression and interaction models analyzed associations.

Main Results:

• Opioid exposure correlated with lower cognitive scores at age 2 and poorer motor scores at age 5.
• Increased risk of intraventricular hemorrhage and post-hemorrhagic ventricular dilatation observed with opioid use.
• No significant association found between opioid exposure and brain volumes or lesion presence.
• No significant interaction identified between opioid exposure and brain measures on neurodevelopmental outcomes.

Conclusions:

• Neonatal opioid exposure is associated with poorer neurodevelopmental outcomes in early childhood.
• Early MRI-assessed brain injury or volumes did not appear to modify the association.
• Longitudinal studies and advanced imaging may offer deeper insights into opioid's long-term neurodevelopmental effects.