Human milk components cross-reacting with antibodies against bovine beta-lactoglobulin

Acta Paediatrica
B NeuteboomA Conti

Abstract

The human whey components cross-reacting with antibodies raised against bovine and/or equine beta-lactoglobulin were screened systematically. The milk of six women on a normal diet was collected within 72 h of confinement and whey components were fractionated by high-speed size exclusion chromatography and reversed-phase techniques. The fractions which were immunoreactive in double diffusion experiments with antisera anti-bovine and/or equine beta-lactoglobulin were subsequently purified by native PAGE and then electroblotted on Pro-blott membrane (Western blotting). Pro-blot membranes were stained in parallel with Coomassie and by immunostaining using antibodies against bovine and/or equine beta-lactoglobulin as first antibody solution. The immunoreactive bands were cut out from the membrane and N-terminally sequenced; all the immunoreactive components were clearly identified as human beta-casein or its (mainly tryptic) fragments. The strong antigenic similarity between human beta-casein and beta-lactoglobulin (bovine and equine) might be of immunological importance; it could mean that breast-fed neonates risk being sensitized to beta-lactoglobulin irrespective of the presence of cow's milk in the mother's diet.

Citations

Jan 1, 1978·International Archives of Allergy and Applied Immunology·S P FälströmL A Hanson
Sep 1, 1977·The Journal of Pediatrics·B H ResmanW J Jusko
Jan 1, 1989·Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology·G HattevigN I Kjellman
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Related Concepts

Tissue Membrane
Beta Lactoglobulin
Western Blotting
SDS-PAGE
Immune Sera
Bos taurus
Lactoglobulins
Cross Reactions
Genus equus
Equus caballus

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