A sensitive luminol-dependent chemiluminescence assay for H2O2 was developed for the indirect determination of the transient changes in NADPH oxidase activity associated with the respiratory burst of human neutrophils. A relatively large, controlled amount of horseradish peroxidase was used in combi
Stimulation of the respiratory burst in human neutrophils by crystal phagocytosis
โ Scribed by Louis Simchowitz; John P. Atkinson; Isaias Spilberg
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 707 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0004-3591
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โฆ Synopsis
Abstract
Exposure to monosodium urate crystals (MSU) stimulated the respiratory burst of human neutrophils as measured by increased O~2~ consumption and the generation of superoxide radicals (O~2~\documentclass{article}\pagestyle{empty}\begin{document}$ [\bar .] $\end{document}). From the comparison of data derived from nitroblue tetrazolium and cytochrome C reduction (two methods of detecting O~2~\documentclass{article}\pagestyle{empty}\begin{document}$ [\bar .] $\end{document} release), it appears that O~2~\documentclass{article}\pagestyle{empty}\begin{document}$ [\bar .] $\end{document} production in response to MSU may be compartmentalized, i.e., occur predominantly in the intracellular space. After exposure to MSU, neutrophils from patients with chronic granulomatous disease lost viability at the normal rate; thus products of the respiratory burst are not likely to be responsible for cell death.
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Maximal rates of 0 ; and H,02 production by human bloodstream monocytes activated during the respiratory burst by phorbol ester were only about 10% of those of neutrophils. Furthermore, monocytes possess only about 5% of the myeloperoxidase activity of neutrophils and so can only produce l o w level