Release of azurophilic granule contents in fMLP-stimulated neutrophils requires two activation signals, one of which is a rise in cytosolic free Ca2+.


We have used a continuous spectrofluorimetric method to analyse the role of cytosolic free Ca2+ ([Ca2+]i) in the lysosomal enzyme release from the azurophilic granules in human neutrophils stimulated with f-Met-Leu-Phe (fMLP) in the presence of cytochalasin B. Measurements were performed with the beta-glucuronidase substrate 4-methylumbelliferyl-beta-D… (More)


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