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Detection of α S1-casein in vomit from bottle-fed babies by enzyme-linked immunosorbent assay

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Summary

This study describes a sensitive enzyme-linked immunosorbent assay (ELISA) using rabbit anti-bovine α S1-casein antibody for the detection of commercial milk and milk-containing vomit. The antibody does not react with other human body fluids such as breast milk. The stability of α S1-casein antigenic activity was examined after storage at different temperatures and enzyme digestion. There was no decrease after storage for one year at room temperature but 40% of the activity was lost after 6 months at 37°C. Enzyme digestion (6 hours, 37°C) resulted in 65 ∼ 70% loss of activity but the antibody reacted with the peptide fragments of α S1-casein. Vomit samples from 3 normal infants were tested by ELISA, and a S 1-casein could be detected in 1 cm2 stain.

Zusammenfassung

Die vorliegende Untersuchung beschreibt einen empfindlichen, enzymgebundenen Immunabsorptionstest (ELISA), der einen Anti-Rinder-α S 1-Casein-Antikörper vom Kaninchen benutzt für den Nachweis kommerziell erhältlicher Milch und milchhaltigen Erbrochenem. Der Antikörper reagiert nicht mit anderen menschlichen Körperflüssigkeiten wie Brustmilch. Die Stabilität der Antigen-Aktivität von α S1-Casein wurde nach Lagerung bei verschiedenen Temperaturen und enzymatischem Verdau untersucht. Es gab keinen Abfall nach einjähriger Lagerung bei Raumtemperatur, aber 40% der Aktivität war nach sechsmonatiger Lagerung bei 37°C verloren. Enzymatischer Verdacht (6 Stunden, 37°C) führte zu einem Aktivitätsverlust von etwa 65–70%, aber der Antikörper reagiert mit den Peptid-Fragmenten von a S1-Casein. Proben von Erbrochenem von drei normalen Kindern wurde mit Hilfe der ELISA-Technik getestet und α S1-Casein konnte in 1 cm2 großen Flecken nachgewiesen werden.

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Sato, I. Detection of α S1-casein in vomit from bottle-fed babies by enzyme-linked immunosorbent assay. Int J Leg Med 105, 127–131 (1992). https://doi.org/10.1007/BF01625163

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  • DOI: https://doi.org/10.1007/BF01625163

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