The relationship between brain structure and cognition in transfused preterm children at school age

Area of Science:

• Neuroscience
• Pediatrics
• Developmental Psychology

Background:

• Preterm birth is associated with altered brain development and cognitive deficits.
• Red blood cell (RBC) transfusion strategies in neonates aim to optimize oxygen delivery but may have unintended consequences.
• Understanding the impact of neonatal interventions on neurodevelopment is crucial for improving long-term outcomes.

Purpose of the Study:

• To investigate the relationship between brain structure and cognitive function in preterm children exposed to a liberal red blood cell (RBC) transfusion strategy.
• To identify potential sex-specific effects of this transfusion strategy on neurodevelopment.

Main Methods:

• Longitudinal study assessing cognitive outcomes (intelligence, achievement, neuropsychological tests) in preterm children.
• Structural neuroimaging (MRI) was performed to evaluate brain volumes.
• Statistical analyses examined correlations between global/regional brain volumes and cognitive performance, considering sex as a factor.

Main Results:

• Global brain volumes were correlated with overall cognitive outcomes.
• Female participants exhibited lower verbal fluency compared to males.
• Reduced temporal white matter volume in females was significantly associated with poorer verbal fluency performance.

Conclusions:

• Findings suggest a potential adverse neurodevelopmental effect of a liberal RBC transfusion strategy in preterm infants.
• Specifically, females exposed to this strategy showed reduced temporal white matter volume, which was directly linked to impaired verbal fluency.
• Further research is warranted to confirm these findings and elucidate the mechanisms underlying sex-specific effects.