Leukocyte alkaline phosphatase in the newborn

Area of Science:

• Biochemistry
• Neonatal Physiology
• Maternal-Fetal Medicine

Background:

• Leukocyte alkaline phosphatase (LAP) is an enzyme crucial for immune function.
• Understanding LAP activity dynamics in newborns and mothers is vital for assessing neonatal health.
• Maternal and neonatal biochemical markers provide insights into physiological adaptations during birth.

Purpose of the Study:

• To investigate and compare Leukocyte alkaline phosphatase (LAP) activity between mothers and their newborns immediately after delivery and on the 4th day postpartum.
• To examine the influence of labor duration and newborn sex on LAP activity.
• To determine the correlation between neonatal LAP scores and birth weight.

Main Methods:

• Enzyme activity assay for Leukocyte alkaline phosphatase (LAP).
• Comparative analysis of LAP scores in 50 mothers and their newborns at two time points (delivery and 4 days postpartum).
• Statistical evaluation of differences based on sex, labor duration, and birth weight.

Main Results:

• Newborns exhibited lower LAP activity compared to their mothers.
• A significant decline in neonatal LAP activity was observed by the 4th day postpartum.
• No significant differences in LAP activity were found between newborns from normal and prolonged labor.
• Initial sex-based differences in LAP scores (males lower than females) reversed by day 4.
• Neonatal LAP scores correlated with newborn weight 4 days after delivery.

Conclusions:

• Neonatal LAP activity undergoes significant changes in the early postpartum period.
• Sex and birth weight are factors influencing LAP levels in newborns.
• LAP activity may serve as a potential indicator of neonatal physiological status and adaptation.