PMID: 6404983Jun 1, 1983Paper

A flow cytometric assay of neutrophil degranulation

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
W R AbramsA B Kane

Abstract

A quantitative assay of neutrophil degranulation was developed using flow cytometry. Dog neutrophils were purified to greater than 95% purity and viability by isopyknic density centrifugation in an isosmotic medium. These cells concentrated the fluorochrome acridine orange (AO) in their azurophilic granules, but not in specific granules. Also contained in the azurophilic granules are elastase, myeloperoxidase, and approximately 50% of the lysozyme activity. The fluorochrome was released concomitantly with elastase activity, as shown by flow cytometry, fluorescence microscopy, and biochemical assay in response to the ionophore A23187. By flow cytometry, unstimulated cells are distributed in a single broad peak of high fluorescence intensity. With increasing concentrations of A23187 (0.48-4.80 microM), a greater proportion of the cells shifted to a single peak of low fluorescence intensity. Few cells with intermediate fluorescence were observed. These analyses revealed that the neutrophils degranulated in a quantal, all-or-none response.

Citations

Oct 1, 1987·The American Review of Respiratory Disease·C B GlaserW R Abrams
Jan 1, 1988·Experimental Lung Research·W R AbramsG Weinbaum
Apr 22, 2003·The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology·Alejandro RodríguezJosé Meseguer
Sep 8, 2004·Life Sciences·Kenneth ChiangNalini Santanam
Nov 23, 2017·Frontiers in Microbiology·Roberto J González-HernándezHéctor M Mora-Montes
May 3, 2018·FEMS Yeast Research·Marco J Hernández-ChávezHéctor Manuel Mora-Montes
Jul 1, 1987·Acta Pathologica, Microbiologica, Et Immunologica Scandinavica. Section A, Pathology·M OlssonU Brunk
May 22, 2021·The Journal of Trauma and Acute Care Surgery·Jennifer M LeonardIsaiah R Turnbull

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