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Effects of brief early exposure to partially hydrolyzed and whole cow milk proteins
J Schmitz1, B Digeon, C Chastang
1Department of Pediatrics, Hôpital des Enfants Malades, Paris, France.
Insights
Early infant exposure to food antigens, even briefly, influences immune responses. Hydrolyzed formulas in breastfed infants showed lower specific IgG titers, suggesting early antigen exposure modulates immunity.
Area of Science:
- Immunology
- Neonatal Nutrition
- Allergy Research
Background:
- Early life immune development is crucial for food antigen responses.
- The impact of brief neonatal food antigen exposure is not well understood.
- Understanding early immune sensitization is key to preventing food allergies.
Purpose of the Study:
- To investigate the immunologic effects of early, short-term formula supplementation in breastfed infants.
- To compare immune responses to food antigens between infants receiving adapted versus hydrolyzed formulas.
- To assess clinical and humoral immune outcomes at multiple time points.
Main Methods:
- Prospective, controlled study of 256 breastfed infants.
- Random assignment to adapted (Nidina) or partially hydrolyzed (Nidal HA) formula supplementation.
- Clinical and immunological assessments at days 5, 90, 150, and 365.
Main Results:
- No significant differences in clinical symptoms or IgE responses between groups.
- Infants on hydrolyzed formula had lower median specific IgG titers.
- Significant differences in IgG titers for alpha-lactalbumin and casein were observed.
Conclusions:
- Early, short-term exposure to food antigens modulates humoral immune responses in breastfed infants.
- Partially hydrolyzed formulas may lead to reduced IgG responses to specific food proteins.
- Further research is needed to understand long-term implications for allergy development.
Abstract:
Clinical experience ("the dangerous bottle") and experimental evidence indicate that the early life of an infant is particularly important for the development of the immune responses to food antigens. However, the clinical and immunologic consequences of a brief exposure to, or avoidance of, food antigens during the neonatal period in human infants are poorly understood and documented. We present the preliminary results of a prospective controlled study of 256 normal breast-fed infants randomly assigned to receive (blind) either an adapted formula (Nidina) or a partially hydrolyzed formula (Nidal HA) as a supplement to breast-feeding for a few days when necessary, and to be examined at days 5, 90, 150, and 365. The results indicated that (1) the prevalence of clinical symptoms and of total and specific IgE responses was not statistically different in the two groups of infants and (2) infants fed a hydrolyzed formula had median titers of specific IgG lower than those fed an adapted formula; the difference was significant for alpha-lactalbumin at day 90 (p < 0.005) and for alpha-lactalbumin (p < 0.05), casein (p < 0.05), and hydrolyzed formula (p < 0.01) at day 150. Humoral immune responses of breast-fed infants to food antigens thus appear to be modulated by early, short-term exposure to them.