Low colostral IgA associated with cow's milk allergy.

Area of Science:

• Immunology
• Pediatrics
• Nutrition

Background:

• Cow's milk allergy is a common concern in infants.
• The role of maternal factors in infant allergy development is under investigation.

Purpose of the Study:

• To investigate maternal milk composition differences between infants with and without cow's milk allergy.
• To explore the association between maternal immunoglobulin levels and infant cow's milk allergy.

Main Methods:

• Compared immunoglobulin (IgA, IgG, IgM) and specific antibody levels in colostrum and milk from mothers of allergic and non-allergic infants.
• Assessed beta-lactoglobulin content in maternal milk.

Main Results:

• Mothers of infants with cow's milk allergy exhibited significantly lower total IgA levels in their milk throughout lactation compared to controls.
• This difference was most pronounced in colostrum.
• No significant differences were observed in other immunoglobulin levels or specific antibody responses.

Conclusions:

• Lower total IgA content in maternal colostrum may be a risk factor for developing cow's milk allergy in infants.
• Maternal milk IgA may play a protective role against infant food allergies.