Transient plasma cholinesterase deficiency in preterm infants

Area of Science:

• Biochemistry
• Neonatal Medicine
• Pharmacology

Background:

• Plasma cholinesterase (ChE) is crucial for metabolizing certain drugs, including muscle relaxants.
• Understanding ChE activity in newborns is vital for safe medication use.
• Previous data on neonatal ChE levels, especially in preterm infants, is limited.

Purpose of the Study:

• To determine plasma cholinesterase activity in healthy preterm and term infants shortly after birth.
• To compare neonatal ChE levels with those of adult individuals.
• To investigate potential correlations between ChE activity and factors like gestational age, sex, or race in preterm infants.

Main Methods:

• Plasma samples from 39 preterm and 20 term infants were analyzed using a commercial screening assay.
• 40 adult blood samples were included for comparative analysis.
• Statistical analysis was performed to compare enzyme levels and identify correlations.

Main Results:

• No significant differences in abnormally low plasma cholinesterase levels were observed between preterm infants, term infants, and adults.
• Cholinesterase activity in preterm infants did not correlate with gestational age, sex, or race.
• Initially low ChE levels normalized to adult levels within two weeks in nearly all preterm infants.

Conclusions:

• Healthy preterm and term infants generally exhibit normal plasma cholinesterase activity at birth.
• A transient deficiency may occur in some preterm infants, potentially impacting drug metabolism.
• Monitoring ChE activity or considering alternative muscle relaxants is advisable when administering drugs like succinylcholine to hospitalized preterm infants.