Title : Diffusion of extracellular hydrogen peroxide into intracellular compartments of human neutrophils. Studies utilizing the inactivation of myeloperoxidase by hydrogen peroxide and azide.

Pub. Date : 1985 Jul 15

PMID : 2989289






7 Functional Relationships(s)
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1 Studies utilizing the inactivation of myeloperoxidase by hydrogen peroxide and azide. Azides myeloperoxidase Homo sapiens
2 In this report, we show that myeloperoxidase is also inactivated by H2O2 plus azide. Azides myeloperoxidase Homo sapiens
3 Stimulation of neutrophils with phorbol myristate acetate (PMA, 100 ng/ml) plus azide (5 mM) for 30 min completely inactivated intragranular myeloperoxidase and reduced cytosolic catalase to 35% of resting cells. Azides myeloperoxidase Homo sapiens
4 Incubation of neutrophils with azide and a H2O2 generating system (glucose-glucose oxidase) inactivated 41% of neutrophil myeloperoxidase. Azides myeloperoxidase Homo sapiens
5 Glutathione-glutathione peroxidase (GSH-GSH peroxidase), an extracellular H2O2 scavenger, totally protected neutrophil myeloperoxidase from inactivation by azide plus glucose-glucose oxidase. Azides myeloperoxidase Homo sapiens
6 In addition, when a mixture of normal and CGD cells was stimulated with PMA in the presence of azide, 90% of the myeloperoxidase in CGD neutrophils was inactivated. Azides myeloperoxidase Homo sapiens
7 In contrast, myeloperoxidase in normal polymorphonuclear leukocytes stimulated with PMA in the presence of azide and GSH-GSH peroxidase was 75% inactivated. Azides myeloperoxidase Homo sapiens