Phenol-soluble modulin α and β display divergent roles in mice with staphylococcal septic arthritis.
Journal
Communications biology
ISSN: 2399-3642
Titre abrégé: Commun Biol
Pays: England
ID NLM: 101719179
Informations de publication
Date de publication:
05 09 2022
05 09 2022
Historique:
received:
10
02
2022
accepted:
12
08
2022
entrez:
6
9
2022
pubmed:
7
9
2022
medline:
9
9
2022
Statut:
epublish
Résumé
Phenol-soluble modulin α (PSMα) is identified as potent virulence factors in Staphylococcus aureus (S. aureus) infections. Very little is known about the role of PSMβ which belongs to the same toxin family. Here we compared the role of PSMs in S. aureus-induced septic arthritis in a murine model using three isogenic S. aureus strains differing in the expression of PSMs (Newman, Δpsmα, and Δpsmβ). The effects of PSMs on neutrophil NADPH-oxidase activity were determined in vitro. We show that the PSMα activates neutrophils via the formyl peptide receptor (FPR) 2 and reduces their NADPH-oxidase activity in response to the phorbol ester PMA. Despite being a poor neutrophil activator, PSMβ has the ability to reduce the neutrophil activating effect of PSMα and to partly reverse the effect of PSMα on the neutrophil response to PMA. Mice infected with S. aureus lacking PSMα had better weight development and lower bacterial burden in the kidneys compared to mice infected with the parental strain, whereas mice infected with bacteria lacking PSMβ strain developed more severe septic arthritis accompanied with higher IL-6 and KC. We conclude that PSMα and PSMβ play distinct roles in septic arthritis: PSMα aggravates systemic infection, whereas PSMβ protects arthritis development.
Identifiants
pubmed: 36065015
doi: 10.1038/s42003-022-03839-2
pii: 10.1038/s42003-022-03839-2
pmc: PMC9445034
doi:
Substances chimiques
Bacterial Toxins
0
staphylococcal delta toxin
0
NADP
53-59-8
Oxidoreductases
EC 1.-
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
910Informations de copyright
© 2022. The Author(s).
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