The effect of clindamycin and amoxicillin on neutrophil extracellular trap (NET) release.
Neutrophil extracellular traps (NETs) are threads of nuclear DNA complexed with antimicrobial proteins released by neutrophils to extracellular matrix to bind, immobilise, and kill different pathogens. NET formation is triggered by different physiological and non-physiological stimulants. It is also suggested that antibiotics could be non-physiological compounds that influence NET release. The aim of the study was to investigate the effect of clindamycin and amoxicillin on NET release and the phagocyte function of neutrophils. Neutrophils isolated from healthy donors by density centrifugation method were incubated with amoxicillin or clindamycin for two hours, and then NET release was stimulated with phorbol 12-myristate 13-acetate (PMA). After three hours of incubation with PMA NETs were quantified as amount of extracellular DNA by fluorometry and visualised by immunofluorescent microscopy. The percent of phagocyting cells was measured by flow cytometry. We showed that amoxicillin induces NET formation (increase of extracellular DNA fluorescence, p = 0.03), while clindamycin had no influence on NET release (p > 0.05), as confirmed by quantitative measurement and fluorescent microscopy. Regarding phagocyte function, both antibiotics increased bacterial uptake (43.3% and 61.6% median increase for amoxicillin and clindamycin, respectively). We concluded that the ability of antibiotics to modulate NET release depends on the antibiotic used and is not associated with their ability to influence phagocytosis.
Student's Scientific Group at the Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
Weronika
W
Bystrzycka
Student's Scientific Group at the Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
Aneta
A
Moskalik
Student's Scientific Group at the Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
Sandra
S
Sieczkowska
Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland; Postgraduate School of Molecular Medicine, Medical University of Warsaw, Poland.
Aneta
A
Manda-Handzlik
Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
Urszula
U
Demkow
Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
Olga
O
Ciepiela
amoxicillin; antibiotics; clindamycin; neutrophil extracellular traps; phagocytosis