Abstract
Extracellular plasma DNA is thought to act as a damage-associated molecular pattern causing activation of immune cells. However, purified preparations of mitochondrial and nuclear DNA were unable to induce neutrophil activation in vitro. Thus, we examined whether granulocyte-macrophage colony-stimulating factor (GM-CSF) acting as a neutrophil priming agent can promote the activation of neutrophils by different types of extracellular DNA. GM-CSF pretreatment greatly increased p38 MAPK phosphorylation and promoted CD11b/CD66b expression in human neutrophils treated with mitochondrial and, to a lesser extent, with nuclear DNA. Our experiments clearly indicate that GM-CSFinduced priming of human neutrophils is necessary for their subsequent activation by extracellular DNA.
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Abbreviations
- GM-CSF:
-
granulocyte-macrophage colony-stimulating factor
- mtDNA:
-
mitochondrial DNA
- nDNA:
-
nuclear DNA
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Originally published in Biochemistry (Moscow) On-Line Papers in Press, as Manuscript BM16-043, April 3, 2016.
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Prikhodko, A.S., Vitushkina, M.V., Zinovkina, L.A. et al. Priming of human neutrophils is necessary for their activation by extracellular DNA. Biochemistry Moscow 81, 609–614 (2016). https://doi.org/10.1134/S0006297916060079
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DOI: https://doi.org/10.1134/S0006297916060079