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Prenatal allergen contact with milk proteins
Z Szépfalusi1, I Nentwich, M Gerstmayr
1Department of Pediatrics, University of Vienna, Austria.
Summary
Newborns
Area of Science:
- Immunology
- Neonatal Health
- Allergen Exposure
Background:
- Cord blood cells exhibit proliferation in response to various allergens.
- The origin of this reactivity, whether in utero or post-natal, remains uncertain.
Purpose of the Study:
- To investigate cellular reactivity and cytokine production in cord blood cells from newborns exposed to cow's milk proteins.
- To explore potential prenatal allergen contact.
Main Methods:
- Incubation of cord blood mononuclear cells from 39 neonates with specific cow's milk proteins.
- Assessment of cell proliferation via [3H]thymidine incorporation.
- Evaluation of interferon-gamma (IFN-γ) and interleukin-4 (IL-4) secretion.
Main Results:
- Significant cell proliferation observed in response to alpha-lactalbumin, beta-lactoglobulin, and alpha-casein.
- No correlation found between milk protein proliferation and parental atopy or IgE levels.
- IFN-γ production inducible by PHA, but limited response to allergens; reduced IFN-γ in infants with allergic parental history.
Conclusions:
- Cord blood cells recognize allergens, suggesting prenatal priming.
- The clinical significance of this prenatal allergen exposure for future sensitization requires further investigation.