Exposure to air pollution during pregnancy and newborn liver function

Area of Science:

• Environmental Health
• Toxicology
• Pediatrics

Background:

• Air pollution exposure is linked to numerous adverse health effects.
• Limited data exists on the specific impact of air pollution on neonatal liver enzymes.
• Particulate matter (PM1, PM2.5, PM10) represents a significant component of air pollution.

Purpose of the Study:

• To investigate the association between prenatal exposure to ambient PM (PM1, PM2.5, PM10) and neonatal liver enzyme levels (AST, ALT, ALP, GGT).
• To explore the relationship between traffic-related air pollution indicators (street length, distance to major roads) and these liver enzymes.
• To assess these associations in newborns from Sabzevar, Iran.

Main Methods:

• Cross-sectional study involving 150 newborns.
• Land use regression models estimated personal exposure to PM during pregnancy.
• Multiple linear regression analyses examined associations between PM exposure, traffic indicators, and liver enzymes, controlling for covariates.

Main Results:

• Increased exposure to PM1, PM2.5, and PM10 during pregnancy was associated with higher levels of AST, ALT, and GGT in newborn cord blood.
• Greater total street length within 100m of residence correlated with elevated AST, ALT, and GGT.
• Increased distance from major roads showed a significant inverse association with AST levels.

Conclusions:

• Prenatal exposure to particulate matter is associated with increased liver enzymes in newborns.
• Traffic-related air pollution indicators also show a link to altered neonatal liver enzyme profiles.
• Further research is warranted to validate these findings in diverse populations and settings.