title: Effect of polyclonal immunoglobulins on neutrophil phagocytic capacity and reactive oxygen production in patients with gram-negative septicemia.
abstract: The effect of immunoglobulin (Ig) preparations on neutrophil phagocytic ability and oxidative burst in response to Escherichia coli stimulation was analyzed in 14 patients with gram-negative septicemia by an ex vivo whole blood assay using flow cytometry. In patients, neutrophils exhibited a decreased capacity to phagocytize E. coli and generate reactive oxygen products compared to healthy controls (median -68%, P < 0.01). The addition of both 7S-Ig and 19S-Ig enriched preparations in vitro resulted in a dose-dependent increase in neutrophil reactive oxygen production at concentrations of 10 g/l (median +153% and +211%, P < 0.01, respectively) and 20 g/l (median +205% and +282%, P < 0.01, respectively). A decreased neutrophil phagocytic ability was seen in patients with septicemia (median -58%) compared to healthy controls (P < 0.01). Again, the addition of 7S and 19S-Igs enhanced the phagocytic ability in a dose-dependent manner (10 g/l: median +56 and +126%; 20 g/l: median +126% and +165%, P < 0.01 for all). It can be concluded that both polyclonal Igs can increase depressed neutrophil reactive oxygen production and neutrophil phagocytosis in patients with gram-negative septicemia.
authors.affiliation: Abt. für Infektionen, Universitätsklinik für Innere Medizin, Wien, Austria.
authors.forename: C
authors.initials: C
authors.lastname: Wenisch
authors.forename: B
authors.initials: B
authors.lastname: Parschalk
authors.forename: S
authors.initials: S
authors.lastname: Patruta
authors.forename: R
authors.initials: R
authors.lastname: Brustbauer
authors.forename: W
authors.initials: W
authors.lastname: Graninger
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000276:immunology*; D016470:Bacteremia / Q000276:immunology*; D004926:Escherichia coli / Q000276:immunology; D004927:Escherichia coli Infections / Q000276:immunology*; D005260:Female; D006090:Gram-Negative Bacteria / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000276:immunology* / Q000378:metabolism; D010587:Phagocytosis / Q000276:immunology*; D017382:Reactive Oxygen Species / Q000378:metabolism*; D016897:Respiratory Burst / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D007136:Immunoglobulins; D017382:Reactive Oxygen Species