Characterization of bacterial DNA binding to human neutrophil surface
Bacterial DNA activates neutrophils through a CpG- and TLR9-independent mechanism. Neutrophil activation does not require DNA internalization, suggesting that it results from the interaction of bacterial DNA with a neutrophil surface receptor. The aim of this study was to characterize the interactio...
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Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00236837_v88_n9_p926_FuxmanBass http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00236837_v88_n9_p926_FuxmanBass_oai |
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I28-R145-paper_00236837_v88_n9_p926_FuxmanBass_oai2020-10-19 Fuxman Bass, J.I. Gabelloni, M.L. Alvarez, M.E. Vermeulen, M.E. Russo, D.M. Zorreguieta, Á. Geffner, J.R. Trevani, A.S. 2008 Bacterial DNA activates neutrophils through a CpG- and TLR9-independent mechanism. Neutrophil activation does not require DNA internalization, suggesting that it results from the interaction of bacterial DNA with a neutrophil surface receptor. The aim of this study was to characterize the interaction of bacterial DNA with the neutrophil surface. Bacterial DNA binding showed saturation and was inhibited by unlabeled DNA but not by other polyanions like yeast tRNA and poly-A. Resembling the conditions under which bacterial DNA triggers neutrophil activation, binding was not modified in the presence or absence of calcium, magnesium or serum. Treatment of neutrophils with proteases not only dramatically reduced bacterial DNA binding but also inhibited neutrophil activation induced by bacterial DNA. Experiments performed with DNA samples of different lengths obtained after digestion of bacterial DNA with DNase showed that only DNA fragments greater than ≈170-180 nucleotides competed bacterial DNA binding and retained the ability to trigger cell activation. Treatment of neutrophils with chemoattractants or conventional agonists significantly increased bacterial DNA binding. Moreover, neutrophils that underwent transmigration through human endothelial cell monolayers even in the absence of chemoattractants, exhibited higher binding levels of bacterial DNA. Together, our findings provide evidence that binding of bacterial DNA to neutrophils is a receptor-mediated process that conditions the ability of DNA to trigger cell activation. We speculate that neutrophil recognition of bacterial DNA might be modulated by the balance of agonists present at inflammatory foci. This effect might be relevant in bacterial infections with a biofilm etiology, in which extracellular DNA could function as a potent neutrophil agonist. © 2008 USCAP, Inc All rights reserved. Fil:Fuxman Bass, J.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gabelloni, M.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vermeulen, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Russo, D.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zorreguieta, Á. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Trevani, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00236837_v88_n9_p926_FuxmanBass info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Lab. Invest. 2008;88(9):926-937 Bacterial DNA binding Biofilm CpG Inflammation Neutrophils TLR9 bacterial DNA chemoattractant deoxyribonuclease article biotinylation cell culture cell isolation cell migration cell surface controlled study DNA binding human human cell neutrophil priority journal Base Sequence Biofilms Cells, Cultured DNA Primers DNA, Bacterial Escherichia coli Humans Neutrophils Characterization of bacterial DNA binding to human neutrophil surface info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00236837_v88_n9_p926_FuxmanBass_oai |
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Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-145 |
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Repositorio Digital de la Universidad de Buenos Aires (UBA) |
topic |
Bacterial DNA binding Biofilm CpG Inflammation Neutrophils TLR9 bacterial DNA chemoattractant deoxyribonuclease article biotinylation cell culture cell isolation cell migration cell surface controlled study DNA binding human human cell neutrophil priority journal Base Sequence Biofilms Cells, Cultured DNA Primers DNA, Bacterial Escherichia coli Humans Neutrophils |
spellingShingle |
Bacterial DNA binding Biofilm CpG Inflammation Neutrophils TLR9 bacterial DNA chemoattractant deoxyribonuclease article biotinylation cell culture cell isolation cell migration cell surface controlled study DNA binding human human cell neutrophil priority journal Base Sequence Biofilms Cells, Cultured DNA Primers DNA, Bacterial Escherichia coli Humans Neutrophils Fuxman Bass, J.I. Gabelloni, M.L. Alvarez, M.E. Vermeulen, M.E. Russo, D.M. Zorreguieta, Á. Geffner, J.R. Trevani, A.S. Characterization of bacterial DNA binding to human neutrophil surface |
topic_facet |
Bacterial DNA binding Biofilm CpG Inflammation Neutrophils TLR9 bacterial DNA chemoattractant deoxyribonuclease article biotinylation cell culture cell isolation cell migration cell surface controlled study DNA binding human human cell neutrophil priority journal Base Sequence Biofilms Cells, Cultured DNA Primers DNA, Bacterial Escherichia coli Humans Neutrophils |
description |
Bacterial DNA activates neutrophils through a CpG- and TLR9-independent mechanism. Neutrophil activation does not require DNA internalization, suggesting that it results from the interaction of bacterial DNA with a neutrophil surface receptor. The aim of this study was to characterize the interaction of bacterial DNA with the neutrophil surface. Bacterial DNA binding showed saturation and was inhibited by unlabeled DNA but not by other polyanions like yeast tRNA and poly-A. Resembling the conditions under which bacterial DNA triggers neutrophil activation, binding was not modified in the presence or absence of calcium, magnesium or serum. Treatment of neutrophils with proteases not only dramatically reduced bacterial DNA binding but also inhibited neutrophil activation induced by bacterial DNA. Experiments performed with DNA samples of different lengths obtained after digestion of bacterial DNA with DNase showed that only DNA fragments greater than ≈170-180 nucleotides competed bacterial DNA binding and retained the ability to trigger cell activation. Treatment of neutrophils with chemoattractants or conventional agonists significantly increased bacterial DNA binding. Moreover, neutrophils that underwent transmigration through human endothelial cell monolayers even in the absence of chemoattractants, exhibited higher binding levels of bacterial DNA. Together, our findings provide evidence that binding of bacterial DNA to neutrophils is a receptor-mediated process that conditions the ability of DNA to trigger cell activation. We speculate that neutrophil recognition of bacterial DNA might be modulated by the balance of agonists present at inflammatory foci. This effect might be relevant in bacterial infections with a biofilm etiology, in which extracellular DNA could function as a potent neutrophil agonist. © 2008 USCAP, Inc All rights reserved. |
format |
Artículo Artículo publishedVersion |
author |
Fuxman Bass, J.I. Gabelloni, M.L. Alvarez, M.E. Vermeulen, M.E. Russo, D.M. Zorreguieta, Á. Geffner, J.R. Trevani, A.S. |
author_facet |
Fuxman Bass, J.I. Gabelloni, M.L. Alvarez, M.E. Vermeulen, M.E. Russo, D.M. Zorreguieta, Á. Geffner, J.R. Trevani, A.S. |
author_sort |
Fuxman Bass, J.I. |
title |
Characterization of bacterial DNA binding to human neutrophil surface |
title_short |
Characterization of bacterial DNA binding to human neutrophil surface |
title_full |
Characterization of bacterial DNA binding to human neutrophil surface |
title_fullStr |
Characterization of bacterial DNA binding to human neutrophil surface |
title_full_unstemmed |
Characterization of bacterial DNA binding to human neutrophil surface |
title_sort |
characterization of bacterial dna binding to human neutrophil surface |
publishDate |
2008 |
url |
http://hdl.handle.net/20.500.12110/paper_00236837_v88_n9_p926_FuxmanBass http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00236837_v88_n9_p926_FuxmanBass_oai |
work_keys_str_mv |
AT fuxmanbassji characterizationofbacterialdnabindingtohumanneutrophilsurface AT gabelloniml characterizationofbacterialdnabindingtohumanneutrophilsurface AT alvarezme characterizationofbacterialdnabindingtohumanneutrophilsurface AT vermeulenme characterizationofbacterialdnabindingtohumanneutrophilsurface AT russodm characterizationofbacterialdnabindingtohumanneutrophilsurface AT zorreguietaa characterizationofbacterialdnabindingtohumanneutrophilsurface AT geffnerjr characterizationofbacterialdnabindingtohumanneutrophilsurface AT trevanias characterizationofbacterialdnabindingtohumanneutrophilsurface |
_version_ |
1766026608978690048 |