Degradation of aflatoxin by lactoperoxidase
- 1 January 1978
- journal article
- research article
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 166 (5) , 271-273
- https://doi.org/10.1007/bf01127651
Abstract
Aflatoxin wurde in Gegenwart von 225 μm-NaCI und 50 μm-H2O2 bei 28° C durch 5, 50 bzw. 500 Einheiten von Lactoperoxidase/ml Reaktionsgemisch abgebaut. Wenn die Konzentration der Lactoperoxidase von 50 bis auf 500 Einheiten/ml Reaktionsgemisch gesteigert wurde, dann stieg die Geschwindigkeit des Aflatoxinabbaues von 3,6 bis auf 5,1%/24 Std. Lactoperoxidase baute Aflatoxin G1 1,5 mal schneller ab als Aflatoxin B1. Die Konzentration des Aflatoxins zu Beginn spielte keine Rolle beim Abbau durch, die Lactoperoxidase. Die Abbauprodukte von Aflatoxin B 1 waren chromatografisch dem Aflatoxin B2a ähnlich oder waren wasserlöslich. Gleiche Abbauprodukte, aber in größeren Anteilen, erhielt man durch das Mycel vonAspergillus parasiticus. Three concentrations of lactoperoxidase, 5, 50, and 500 units/ml of reaction mixture, degraded aflatoxin in the presence of 225 μM NaCl and 50 μM H202 at 28° C. Increasing the amount of lactoperoxidase from 50 to 500 units/ml of reaction mixture resulted in increasing the rate of degradation of aflatoxin B1 from 3.6 to 5.1%/24 h. When comparable amounts of lactoperoxidase were present, aflatoxin G1 was degraded approximately 1.5 times faster than was aflatoxin 131. At a given concentration of lactoperoxidase, aflatoxin degradation was independent of initial aflatoxin concentration. Derivatives that cochromatographed with aflatoxin B2a and derivatives that were water soluble were the major degradation products of aflatoxin B1. Similar derivatives, but in greater proportions, were noted as degradation products that resulted from activity of a blendure of mycelia ofAspergillus parasiticus.Keywords
This publication has 7 references indexed in Scilit:
- Bisulfite Degrades Aflatoxin: Effect of Citric Acid and Methanol and Possible Mechanism of DegradationJournal of Food Protection, 1978
- COMPUTER CONTROLLED DIFFUSION FURNACE SYSTEMInformation Display, 1978
- Electrophoretic comparisons of mycelial enzymes from aflatoxin-producing and non-producing strains of Aspergillus flavus and Aspergillus parasiticusCanadian Journal of Microbiology, 1977
- The role of aflatoxin metabolism in its toxic lesionToxicology and Applied Pharmacology, 1976
- The role of pH in the chemiluminescent response of the myeloperoxidase-halide-HOOH antimicrobial systemBiochemical and Biophysical Research Communications, 1975
- Myeloperoxidase-Halide-Hydrogen Peroxide Antibacterial SystemJournal of Bacteriology, 1968