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Assessment of bovine mammary gland macrophage oxidative burst activity in a chemiluminescence assay

Assessment of bovine mammary gland macrophage oxidative burst activity in a chemiluminescence assay

American Journal of Veterinary Research 48(1): 119-125

A major bactericidal mechanism of neutrophils and macrophages is the generation of toxic oxygen-free radicals upon phagocytosis of microbes. Studies were conducted to assess the oxidative metabolism of bovine mammary gland macrophages. Bovine mammary gland macrophages were challenge exposed with a variety of phagocytic stimuli in an in vitro, luminol-assisted chemiluminescence assay. A measurable oxidative burst was observed when macrophages were challenge exposed with heat-aggregated bovine immunoglobulin, opsonified zymosan, and nonopsonified zymosan. Addition of superoxide dismutase decreased mammary gland macrophage chemiluminescence in a dose-dependent manner. Brucella abortus, when opsonified with antiserum, lacteal antibody, or normal serum, produced an oxidative event, whereas nonopsonified B. abortus did not. When challenge exposed with phagocytic stimuli, mammary gland macrophages produced an oxidative burst similar to that produced by other phagocytes for which an oxidative event is known to be bactericidal.

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Accession: 001533021

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PMID: 3826830

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