Human CD45 is an F-component-specific receptor for the staphylococcal toxin Panton-Valentine leukocidin.
Nat Microbiol
; 3(6): 708-717, 2018 06.
Article
en En
| MEDLINE
| ID: mdl-29736038
The staphylococcal bi-component leukocidins Panton-Valentine leukocidin (PVL) and γ-haemolysin CB (HlgCB) target human phagocytes. Binding of the toxins' S-components to human complement C5a receptor 1 (C5aR1) contributes to cellular tropism and human specificity of PVL and HlgCB. To investigate the role of both leukocidins during infection, we developed a human C5aR1 knock-in (hC5aR1KI) mouse model. HlgCB, but unexpectedly not PVL, contributed to increased bacterial loads in tissues of hC5aR1KI mice. Compared to humans, murine hC5aR1KI neutrophils showed a reduced sensitivity to PVL, which was mediated by the toxin's F-component LukF-PV. By performing a genome-wide CRISPR-Cas9 screen, we identified CD45 as a receptor for LukF-PV. The human-specific interaction between LukF-PV and CD45 provides a molecular explanation for resistance of hC5aR1KI mouse neutrophils to PVL and probably contributes to the lack of a PVL-mediated phenotype during infection in these mice. This study demonstrates an unsuspected role of the F-component in driving the sensitivity of human phagocytes to PVL.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Infecciones Estafilocócicas
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Staphylococcus aureus
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Toxinas Bacterianas
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Antígenos Comunes de Leucocito
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Receptor de Anafilatoxina C5a
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Exotoxinas
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Leucocidinas
Límite:
Animals
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Humans
Idioma:
En
Revista:
Nat Microbiol
Año:
2018
Tipo del documento:
Article
País de afiliación:
Países Bajos
Pais de publicación:
Reino Unido