Open AccessSimultaneous flow cytometric method to measure phagocytosis and oxidative products by neutrophils
Author(s) -
Perticarari S.,
Presani G.,
Mangiarotti M. A.,
Banfi E.
Publication year - 1991
Publication title -
cytometry
Language(s) - English
Resource type - Journals
eISSN - 1097-0320
pISSN - 0196-4763
DOI - 10.1002/cyto.990120713
Subject(s) - respiratory burst , phagocytosis , flow cytometry , ethidium bromide , oxidative phosphorylation , staining , bacteria , microbiology and biotechnology , staphylococcus aureus , fluorescence , biology , fluorescein , chemistry , biochemistry , dna , genetics , physics , quantum mechanics
We developed a rapid and sensitive two‐color flow cytomotric method which allows the simultaneous quantification of both the phagocytosis rate and the oxidative burst activation of polymorphonuclear leukocytes (PMNLs). The oxidation of hydroethidine (HE) to ethidium bromide (EB) was performed by the oxidative neutrophil products within the cells during the respiratory burst, which was stimulated by phagocytized fluorescein‐labeled Staphylococcus aureus . By means of flow cytometry we measured red EB fluorescence emission together with green fluorescence, which was emitted by the ingested fluoresceinated bacteria. The fluorescence intensity was proportional to the number of bacteria ingested. Adherent bacteria were distinguished from the ingested ones. This two‐color cellular staining permits measurement of two different functions of neutrophils in one step. This method could be of interest for the determination of the interactions between neutrophils and bacteria and for the investigations on infectious diseases in chronic granulomatous disease patients.