Maternal smoking does not influence cord serum IgE or IgD concentrations

Area of Science:

• Immunology
• Environmental Health
• Perinatal Medicine

Background:

• Elevated cord blood immunoglobulin E (IgE) is linked to childhood atopy.
• Previous studies suggested a correlation between maternal smoking and increased cord blood IgE.
• This prompted an investigation into the relationship between parental smoking and atopic risk.

Purpose of the Study:

• To prospectively examine the association between parental smoking during pregnancy and cord blood IgE and IgD levels.
• To clarify the impact of prenatal smoke exposure on infant immune markers.

Main Methods:

• A cohort of 847 infants was studied.
• Maternal and paternal smoking histories were collected.
• Cord blood samples were analyzed for IgE and IgD concentrations.
• Cotinine levels were measured in a subset of samples to validate smoking status.

Main Results:

• Maternal smoking was associated with decreased birth weight and length.
• Neither maternal nor paternal smoking showed a significant association with cord blood IgE levels.
• Paternal smoking, but not maternal smoking, was significantly associated with cord blood IgD levels in multivariate analysis.

Conclusions:

• The study did not find evidence that maternal or paternal smoking increases cord blood IgE levels.
• Parental smoking may influence other immune markers, such as IgD, warranting further investigation.