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Thiopentone and propofol, but not methohexitone nor midazolam, inhibit neutrophil oxidative response to the bacterial peptide FMLP

Published online by Cambridge University Press:  04 August 2006

D. Fröhlich
Affiliation:
Department of Anaesthesia, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
G. Rothe
Affiliation:
Department of Clinical Chemistry and Laboratory Medicine, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
B. Schwall
Affiliation:
Department of Anaesthesia, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
G. Schmitz
Affiliation:
Department of Clinical Chemistry and Laboratory Medicine, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
J. Hobbhahn
Affiliation:
Department of Anaesthesia, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
K. Taeger
Affiliation:
Department of Anaesthesia, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
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Abstract

The effects of different anaesthetics on the neutrophil oxidative response in vitro are compared. Neutrophils were stimulated with small amounts of the bacterial peptide N-formyl-L-methionyl-L-leucyl-phenylalanine as a physiological, receptor-dependent stimulus. A new flow cytometry-based method capable of detecting the small amounts of H2O2 generated by neutrophils in a heterogenous all-or-none response following submaximal stimulation with N-formyl-L-methionyl-L-leucyl-phenylalanine was used. Propofol and thiopentone suppressed the respiratory burst significantly (P < 0.05 and P < 0.01) in therapeutic concentrations, while midazolam and methohexitone inhibited significantly (P < 0.01) only at concentrations greater than the therapeutic range. Impairment of the neutrophil response was primarily because of a reduction in the number of neutrophils participating in the respiratory burst and not of a proportional decrease of the fluorescence of all neutrophils.

Type
Original Article
Copyright
1996 European Society of Anaesthesiology

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