Pseudomonas aeruginosa infection reveals a Caspase-1-dependent neutrophil pyroptosis pathway that restrains damaging Histone release
| Autor: | Planès, Rémi, Santoni, Karin, Bagayoko, Salimata, Pericat, David, Bordignon, Pierre-Jean, Hessel, Audrey, Pinilla, Miriam, Leon-Icaza, Stephen-Andonai, Bellard, Elisabeth, Mazères, Serge, Abdderrahim, Rim, Doz-Deblauwe, Emilie, Aylward, Frances, Rombouts, Yoann, Winter, Nathalie, Girard, Jean-Philippe, Burlet-Schiltz, Odile, Pham, Christine T.N., Lamkanfi, Mohamed, Paget, Christophe, Cougoule, Céline, Gonzalez-De-Peredo, Anne, Lefrancais, Emma, Poincloux, Renaud, Meunier, Etienne |
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| Přispěvatelé: | Institut de pharmacologie et de biologie structurale (IPBS), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB] [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology [SDV.IMM.ALL]Life Sciences [q-bio]/Immunology/Allergology [SDV.IMM.II]Life Sciences [q-bio]/Immunology/Innate immunity [SDV.MHEP.PSR]Life Sciences [q-bio]/Human health and pathology/Pulmonology and respiratory tract |
| Zdroj: | bioRxiv |
| Popis: | Neutrophils mediate essential immune and microbicidal processes. Consequently, to counteract neutrophil attack, pathogens have developed various virulence strategies. Here, we showed that Pseudomonas aeruginosa ( P. aeruginosa ) phospholipase ExoU drives pathological NETosis in neutrophils. Surprisingly, inhibition of ExoU activity uncovered a fully functional Caspase-1-driven pyroptosis pathway in neutrophils. Mechanistically, activated NLRC4 inflammasome promoted Caspase-1-dependent Gasdermin-D activation, IL-1β cytokine release and neutrophil pyroptosis. Whereas both pyroptotic and netotic neutrophils released alarmins, only NETosis liberated the destructive DAMPs Histones, which exacerbated Pseudomonas -induced mouse lethality. To the contrary, subcortical actin allowed pyroptotic neutrophils to physically limit poisonous inflammation by keeping Histones intracellularly. Finally, mouse models of infection highlighted that both NETosis and neutrophil Caspase-1 contributed to P. aeruginosa spreading. Overall, we established the host deleterious consequences of Pseudomonas -induced-NETosis but also uncovered an unsuspected ability of neutrophils to undergo Caspase-1-dependent pyroptosis, a process where neutrophils exhibit a self-regulatory function that limit Histone release. Graphical abstract P.aeruginosa ExoU (right) triggers phospholipid degradation and subsequent neutrophil lysis that associates to NETosis through F-Actin collapse/degradation and PAD4-dependent DNA decondensation. P.aeruginosa ExoU- (left) triggers NLRC4-dependent pyroptosis in neutrophils, which leads to PAD4- depndent DNA decondensation but not expulsion due to a still function subcortical F- Actin network. Created with Biorender.com. |
| Databáze: | OpenAIRE |
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