Perivascular macrophages mediate neutrophil recruitment during bacterial skin infection

Arby Abtin, Rohit Jain, Andrew J Mitchell, Ben Roediger, Anthony J Brzoska, Shweta Tikoo, Qiang Cheng, Lai Guan Ng, Lois L Cavanagh, Ulrich H von Andrian, Michael John Hickey, Neville Firth, Wolfgang Weninger

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160 Citations (Scopus)

Abstract

Transendothelial migration of neutrophils in postcapillary venules is a key event in the inflammatory response against pathogens and tissue damage. The precise regulation of this process is incompletely understood. We report that perivascular macrophages are critical for neutrophil migration into skin infected with the pathogen Staphylococcus aureus. Using multiphoton intravital microscopy we showed that neutrophils extravasate from inflamed dermal venules in close proximity to perivascular macrophages, which are a major source of neutrophil chemoattractants. The virulence factor alpha-hemolysin produced by S. aureus lyses perivascular macrophages, which leads to decreased neutrophil transmigration. Our data illustrate a previously unrecognized role for perivascular macrophages in neutrophil recruitment to inflamed skin and indicate that S. aureus uses hemolysin-dependent killing of these cells as an immune evasion strategy.
Original languageEnglish
Pages (from-to)45 - 53
Number of pages9
JournalNature Immunology
Volume15
Issue number1
DOIs
Publication statusPublished - 2014

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