אסיף מאגר המחקר החקלאי

Antioxidant Activity of Ceruloplasmin in Muscle Membrane and in Situ Lipid Peroxidation

Year:

1988

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Volume :

36

Co-Authors:

Kanner, J., Department of Food Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Sofer, F., Department of Food Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Harel, S., Department of Food Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Doll, L., Department of Food Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel

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Abstract:

Ceruloplasmin acts as ferroxidase, catalyzing the oxidation of ferrous ions to the ferric state and reducing oxygen to water. Membranal lipid peroxidation initiated by an enzymic ADP-iron or by nonenzymic iron redox cycle systems was inhibited by ceruloplasmin. However, membranal lipid peroxidation initiated by H2O2-activated MetMb is not inhibited by ceruloplasmin. In the presence of iron ascorbate, ceruloplasmin inhibited lipid peroxidation initiated by H2O2-activated MetMb at a concentration one-tenth of that which inhibits iron ascorbate membrane lipid peroxidation. This synergistic effect seems to be derived from the possible hydroperoxidase activity of MetMb in the presence of ascorbic acid and ceruloplasmin. In situ minced turkey muscle lipid peroxidation was inhibited by ceruloplasmin, which indicates that most of this peroxidation is catalyzed by free iron ions. © 1988, American Chemical Society. All rights reserved.

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