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Article . 2014 . Peer-reviewed
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The staphylococcal toxins γ-haemolysin AB and CB differentially target phagocytes by employing specific chemokine receptors

Authors: Spaan, András N.; Vrieling, Manouk; Wallet, Pierre; Badiou, Cédric; Reyes-Robles, Tamara; Ohneck, Elizabeth A.; Benito, Yvonne; +9 Authors

The staphylococcal toxins γ-haemolysin AB and CB differentially target phagocytes by employing specific chemokine receptors

Abstract

Evasion of the host phagocyte response by Staphylococcus aureus is crucial to successful infection with the pathogen. γ-haemolysin AB and CB (HlgAB, HlgCB) are bicomponent pore-forming toxins present in almost all human S. aureus isolates. Cellular tropism and contribution of the toxins to S. aureus pathophysiology are poorly understood. Here we identify the chemokine receptors CXCR1, CXCR2 and CCR2 as targets for HlgAB, and the complement receptors C5aR and C5L2 as targets for HlgCB. The receptor expression patterns allow the toxins to efficiently and differentially target phagocytic cells. Murine neutrophils are resistant to HlgAB and HlgCB. CCR2 is the sole murine receptor orthologue compatible with γ-haemolysin. In a murine peritonitis model, HlgAB contributes to S. aureus bacteremia in a CCR2-dependent manner. HlgAB-mediated targeting of CCR2(+) cells highlights the involvement of inflammatory macrophages during S. aureus infection. Functional quantification identifies HlgAB and HlgCB as major secreted staphylococcal leukocidins.

Country
France
Keywords

Male, Staphylococcus aureus, Medical bacteriology, [SDV.IMM] Life Sciences [q-bio]/Immunology, Receptors, CCR2, Interleukin-8A, Cells, Knockout, Bacterial Toxins, Complement, 610, Peritonitis, Inbred C57BL, Article, Receptors, Interleukin-8B, Receptors, Interleukin-8A, Hemolysin Proteins, Mice, Bacterial Proteins, Receptors, Animals, Humans, Interleukin-8B, Cells, Cultured, [SDV.MP.VIR] Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Mice, Knockout, Phagocytes, Cultured, Animal, Macrophages, Staphylococcal Infections, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Receptors, Complement, Mice, Inbred C57BL, Disease Models, Animal, Chemokine, [SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Disease Models, [SDV.IMM]Life Sciences [q-bio]/Immunology, CCR2, Female, Receptors, Chemokine, [SDV.MP.BAC] Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology

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    selected citations
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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 1%
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
146
Top 1%
Top 10%
Top 1%
Green
gold