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Iron-chelating agent desferrioxamine stimulates formation of neutrophil extracellular traps (NETs) in human blood-derived neutrophils.
Völlger, Lena Akong-Moore, Kathryn Cox, Linda Goldmann, Oliver Wang, Yanming Schäfer, Simon T Naim, Hassan Y Nizet, Victor von Köckritz-Blickwede, Maren
Völlger, Lena
Akong-Moore, Kathryn
Cox, Linda
Goldmann, Oliver
Wang, Yanming
Schäfer, Simon T
Naim, Hassan Y
Nizet, Victor
von Köckritz-Blickwede, Maren
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2016-07
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Abstract
Neutrophil extracellular trap (NET) formation is a significant innate immune defense mechanism against microbial infection that complements other neutrophil functions including phagocytosis and degranulation of antimicrobial peptides. NETs are decondensed chromatin structures in which antimicrobial components (histones, antimicrobial peptides and proteases) are deployed and mediate immobilization of microbes. Here we describe an effect of iron chelation on the phenotype of NET formation. Iron-chelating agent desferrioxamine (DFO) showed a modest but significant induction of NETs by freshly isolated human neutrophils as visualized and quantified by immunocytochemistry against histone-DNA complexes. Further analyses revealed that NET induction by iron chelation required NADPH-dependent production of reactive oxygen species (ROS) as well as protease and peptidyl-arginine-deiminase 4 (PAD4) activities, three key mechanistic pathways previously linked to NET formation. Our results demonstrate that iron chelation by DFO contributes to the formation of NETs and suggest a target for pharmacological manipulation of NET activity.
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Iron-chelating agent desferrioxamine stimulates formation of neutrophil extracellular traps (NETs) in human blood-derived neutrophils. 2016, 36 (3): Biosci. Rep.
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en
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1573-4935