Romain Deshayes de Cambronne, Lionel Costa, Caroline Rambaud, Martine Cohen-Salmon, Abdelouhab Bouaboud, Asmaa Tazi, Anne-Cécile Boulay, Anne-Sophie Bourrel, Agnès Fouet, Amandine Picart, Cristina Candeias, Claire Poyart, Julie Guignot, Guillaume Bouvier, Isabelle Plu, Cyril Anjou, Corinne Albiges-Rizo, Eva Faurobert, Institut Cochin (IC UM3 (UMR 8104 / U1016)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Bioinformatique structurale - Structural Bioinformatics, Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), Centre de Bioinformatique, Biostatistique et Biologie Intégrative (C3BI), Centre interdisciplinaire de recherche en biologie (CIRB), Labex MemoLife, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Neuropathologie Raymond Escourolle, CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital Raymond Poincaré [AP-HP], Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institute for Advanced Biosciences / Institut pour l'Avancée des Biosciences (Grenoble) (IAB), Centre Hospitalier Universitaire [Grenoble] (CHU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang - Auvergne-Rhône-Alpes (EFS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre national de Référence des Streptocoques (CNR), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), This work was supported by Agence Nationale de la Recherche (ANR, grant StrepB2brain, ANR-17-CE15-0026-01). LC is a recipient of a postdoctoral fellowship from the ANR (StrepB2brain). ASB is a doctoral fellow funded by Université de Paris. RDDC was funded by FERCM., We are grateful to Pierre-Olivier Couraud (INSERM, Paris, France) for the gift of hCMEC/D3 cells, Alain Duperray for the gift of CHO-ICAM1 cells, Yoshikazu Takada for the gift of CHO-αvβ3 cells, and Glen Ulett for the gift of the GFP plasmid. We are extremely grateful to Nathalie Strazielle and Jean-François Ghersi-Egea from BIP (CRNL, Lyon, France) for choroid plexus isolation and helpful comments. We thank Matthieu Benard from the animal facility of the Institut Cochin and Marine Gaillard for their help with animal experiments and Thomas Guilbert and Fabienne Regnier for their help with brain slice clarification. We also thank the Imag’IC and HistIM core facilities of the Cochin Institute and Shaynoor Dramsi for anti-Srr1 antibody and for critical reading of the manuscript., ANR-17-CE15-0026,strepB2brain,Franchissement de la barrière hémato-méningée par le Streptocoque du groupe B hyper-virulent CC17(2017), Hôpitaux Universitaires Paris Centre (CHU Paris Centre), Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Etablissement français du sang - Auvergne-Rhône-Alpes (EFS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Universitaire [Grenoble] (CHU)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Fouet, Agnès, Franchissement de la barrière hémato-méningée par le Streptocoque du groupe B hyper-virulent CC17 - - strepB2brain2017 - ANR-17-CE15-0026 - AAPG2017 - VALID, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Laboratoire de Neuropathologie Raymond Escourolle [CHU Pitié-Salpétriêre], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
We are grateful to Pierre-Olivier Couraud (INSERM, Paris, France) for the gift of hCMEC/D3 cells, Alain Duperray for the gift of CHO-ICAM1 cells, Yoshikazu Takada for the gift of CHO-αvβ3 cells, and Glen Ulett for the gift of the GFP plasmid. We are extremely grateful to Nathalie Strazielle and Jean-François Ghersi-Egea from BIP (CRNL, Lyon, France) for choroid plexus isolation and helpful comments. We thank Matthieu Benard from the animal facility of the Institut Cochin and Marine Gaillard for their help with animal experiments and Thomas Guilbert and Fabienne Regnier for their help with brain slice clarification. We also thank the Imag’IC and HistIM core facilities of the Cochin Institute and Shaynoor Dramsi for anti-Srr1 antibody and for critical reading of the manuscript.; International audience; Group B Streptococcus (GBS) is the major cause of human neonatal infections. A single clone, designated CC17-GBS, accounts for more than 80% of meningitis cases, the most severe form of the infection. However, the events allowing blood-borne GBS to penetrate the brain remain largely elusive. In this study, we identified the host transmembrane receptors α5β1 and αvβ3 integrins as the ligands of Srr2, a major CC17-GBS-specific adhesin. Two motifs located in the binding region of Srr2 were responsible for the interaction between CC17-GBS and these integrins. We demonstrated in a blood-brain-barrier cellular model that both integrins contributed to the adhesion and internalization of CC17-GBS. Strikingly, both integrins were overexpressed during the postnatal period in the brain vessels of the blood-brain barrier and blood-cerebrospinal fluid barrier and contributed to juvenile susceptibility to CC17 meningitis. Finally, blocking these integrins decreased the ability of CC17-GBS to cross into the CNS of juvenile mice in an in vivo model of meningitis. Our study demonstrated that CC17-GBS exploits integrins in order to cross the brain vessels, leading to meningitis. Importantly, it provides host molecular insights into neonate's susceptibility to CC17-GBS meningitis, thereby opening new perspectives for therapeutic and prevention strategies of GBS-elicited meningitis.