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Hodille E, Plesa A, Bourrelly E, Belmont L, Badiou C, Lina G, Dumitrescu O. Staphylococcal Panton-Valentine Leucocidin and Gamma Haemolysin Target and Lyse Mature Bone Marrow Leucocytes. Toxins (Basel) 2020; 12:toxins12110725. [PMID: 33233557 PMCID: PMC7699679 DOI: 10.3390/toxins12110725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 12/20/2022] Open
Abstract
Staphylococcus aureus is a major human pathogen, inducing several infections ranging from the benign to the life-threatening, such as necrotising pneumonia. S. aureus is capable of producing a great variety of virulence factors, such as bicomponent pore-forming leucocidin, which take part in the physiopathology of staphylococcal infection. In necrotising pneumonia, Panton–Valentine leucocidin (PVL) induces not only lung injury and necrosis, but also leukopenia, regarded as a major factor of a poor prognosis. The aim of the present study was to evaluate the effect of bicomponent pore-forming leucocidin, PVL and gamma haemolysin on bone marrow leucocytes, to better understand the origin of leukopenia. Using multi-parameter cytometry, the expression of leucocidin receptors (C5aR, CXCR1, CXCR2, and CCR2) was assessed and toxin-induced lysis was measured for each bone marrow leucocyte population. We observed that PVL resulted in myeloid-derived cells lysis according to their maturation and their C5aR expression; it also induced monocytes lysis according to host susceptibility. Haemolysin gamma A, B, and C (HlgABC) displayed cytotoxicity to monocytes and natural killer cells, hypothetically through CXCR2 and CXCR1 receptors, respectively. Taken together, the data suggest that PVL and HlgABC can lyse bone marrow leucocytes. Nevertheless, the origin of leukopenia in severe staphylococcal infection is predominantly peripheral, since immature cells stay insensitive to leucocidins.
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Affiliation(s)
- Elisabeth Hodille
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, 69004 Lyon, France; (G.L.); (O.D.)
- Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, 69364 Lyon, France;
- Correspondence:
| | - Adriana Plesa
- Department of Hematology, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Centre de Biologie Sud, 69002 Lyon, France; (A.P.); (E.B.); (L.B.)
| | - Eve Bourrelly
- Department of Hematology, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Centre de Biologie Sud, 69002 Lyon, France; (A.P.); (E.B.); (L.B.)
| | - Lucie Belmont
- Department of Hematology, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Centre de Biologie Sud, 69002 Lyon, France; (A.P.); (E.B.); (L.B.)
| | - Cédric Badiou
- Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, 69364 Lyon, France;
| | - Gerard Lina
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, 69004 Lyon, France; (G.L.); (O.D.)
- Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, 69364 Lyon, France;
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, 69004 Lyon, France
| | - Oana Dumitrescu
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, 69004 Lyon, France; (G.L.); (O.D.)
- Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, 69364 Lyon, France;
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, 69004 Lyon, France
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