Effects of two different domestic boiling practices on the allergenicity of cow's milk proteins
2018
Lamberti, Cristina | Baro, Cristina | Giribaldi, Marzia | Napolitano, Lorenzo | Cavallarin, Laura | Giuffrida, Maria Gabriella
BACKGROUND: The sale of raw drinking milk through automatic dispensers is permitted in some EU member states, but consumers are usually advised to boil the milk before consumption. The present study has been conducted to evaluate the effects of two common domestic boiling techniques on the proteins of raw milk and, in particular, on their potential allergenicity. RESULTS: Native one‐dimensional electrophoresis, N‐terminal amino acid sequencing and immunoblotting have been used to characterize the protein pattern and to evaluate the possible changes in the allergenic properties of the processed milk. The main result of this investigation is that heating induces the aggregation of β‐lactoglobulin in higher‐molecular‐weight products, while caseins seem to be more resistant to the treatments. β‐Lactoglobulin aggregates have been found to be non‐immunoreactive with the sera of subjects suffering from cow's milk protein allergy. CONCLUSION: Domestic boiling modifies the milk protein profile, causing a minor reduction in milk allergenicity. © 2017 Society of Chemical Industry
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