|
1
|
Mahmoud DE, Hanachi M, Yaakoub H, Blanchard S, Pignon P, Souiai O, Delneste Y, Bouchara JP, Papon N, Hérivaux A. Functional insights into human macrophage response against Scedosporium apiospermum and Scedosporium dehoogii. Cytokine 2023; 172:156384. [PMID: 37832161 DOI: 10.1016/j.cyto.2023.156384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/06/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023]
Abstract
Fungal infections caused by Scedosporium species are rising among immunocompromised and immunocompetent patients. Within the immunocompetent group, patients with cystic fibrosis (pwCF) are at high risk of developing a chronic airway colonization by these molds. While S. apiospermum is one of the major species encountered in the lungs of pwCF, S. dehoogii has rarely been reported. The innate immune response is believed to be critical for host defense against fungal infections. However, its role has only recently been elucidated and the immune mechanisms against Scedosporium species are currently unknown. In this context, we undertook a comparative investigation of macrophage-mediated immune responses toward S. apiospermum and S. dehoogii conidia. Our data showed that S. apiospermum and S. dehoogii conidia strongly stimulated the expression of a set of pro-inflammatory cytokines and chemokines such as IL-1β, IL-8, IL-6 and TNFα. We demonstrated that S. dehoogii was more potent in stimulating the early release of pro-inflammatory cytokines and chemokines while S. apiospermum induced a late inflammatory response at a higher level. Flow cytometry analysis showed that M1-like macrophages were able to internalize both S. apiospermum and S. dehoogii conidia, with a similar intracellular killing rate for both species. In conclusion, these results suggest that M1-like macrophages can rapidly initiate a strong immune response against both S. apiospermum and S. dehoogii. This response is characterized by a similar killing of internalized conidia, but a different time course of cytokine production.
Collapse
Affiliation(s)
| | - Mariem Hanachi
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Hajar Yaakoub
- Univ Angers, Univ Brest, IRF, SFR ICAT, 49000 Angers, France
| | - Simon Blanchard
- Univ Angers, Nantes Université, Inserm, CNRS, CRCI2NA, SFR ICAT, F-49000 Angers, France
| | - Pascale Pignon
- Univ Angers, Nantes Université, Inserm, CNRS, CRCI2NA, SFR ICAT, F-49000 Angers, France
| | - Oussama Souiai
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Yves Delneste
- Univ Angers, Nantes Université, Inserm, CNRS, CRCI2NA, SFR ICAT, F-49000 Angers, France; Immunology and Allergology Laboratory, University Hospital of Angers, Angers, France
| | | | - Nicolas Papon
- Univ Angers, Univ Brest, IRF, SFR ICAT, 49000 Angers, France
| | - Anaïs Hérivaux
- Univ Angers, Univ Brest, IRF, SFR ICAT, 49000 Angers, France.
| |
Collapse
|
|
2
|
Staerck C, Yaakoub H, Vandeputte P, Tabiasco J, Godon C, Gastebois A, Giraud S, Guillemette T, Calenda A, Delneste Y, Fleury M, Bouchara JP. The Glycosylphosphatidylinositol-Anchored Superoxide Dismutase of Scedosporium apiospermum Protects the Conidia from Oxidative Stress. J Fungi (Basel) 2021; 7:575. [PMID: 34356954 PMCID: PMC8304446 DOI: 10.3390/jof7070575] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 02/07/2023] Open
Abstract
Scedosporium species are common fungal pathogens in patients with cystic fibrosis (CF). To colonize the CF lungs, fungi must cope with the host immune response, especially the reactive oxygen species (ROS) released by phagocytic cells. To this aim, pathogens have developed various antioxidant systems, including superoxide dismutases (SODs) which constitute the first-line protection against oxidative stress. Interestingly, one of the S. apiospermum SOD-encoding genes (SODD gene) exhibits a glycosylphosphatidylinositol (GPI) anchor-binding site and encodes a conidial-specific surface SOD. In this study, a SODDΔ mutant was engineered from a non-homologous end joining-deficient strain (KU70Δ) of S. apiospermum. Compared to its parent strain, the double mutant KU70Δ/SODDΔ exhibited increased susceptibility to various oxidizing agents and triazole antifungals. In addition, the loss of SodD resulted in an increased intracellular killing of the conidia by M1 macrophages derived from human blood monocytes, suggesting the involvement of this superoxide dismutase in the evasion to the host defenses. Nevertheless, one cannot disregard an indirect role of the enzyme in the synthesis or assembly of the cell wall components since transmission electron microscopic analysis revealed a thickening of the inner cell wall layer of the conidia. Further studies are needed to confirm the role of this enzyme in the pathogenesis of Scedosporium infections, including the production of a recombinant protein and study of its protective effect against the infection in a mouse model of scedosporiosis.
Collapse
Affiliation(s)
- Cindy Staerck
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Hajar Yaakoub
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Patrick Vandeputte
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Julie Tabiasco
- Université d’Angers, Université de Nantes, CHU Angers, Inserm, CRCINA, SFR ICAT, F-49000 Angers, France; (J.T.); (Y.D.)
| | - Charlotte Godon
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Amandine Gastebois
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Sandrine Giraud
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Thomas Guillemette
- Université d’Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France;
| | - Alphonse Calenda
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Yves Delneste
- Université d’Angers, Université de Nantes, CHU Angers, Inserm, CRCINA, SFR ICAT, F-49000 Angers, France; (J.T.); (Y.D.)
| | - Maxime Fleury
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| | - Jean-Philippe Bouchara
- Université d’Angers, Université de Bretagne Occidentale, CHU Angers, Groupe d’Etude des Interactions Hôte-Pathogène (GEIHP, EA3142), SFR ICAT, F-49000 Angers, France; (C.S.); (H.Y.); (P.V.); (C.G.); (A.G.); (S.G.); (A.C.); (M.F.)
| |
Collapse
|