1. Evidence of early increased sialylation of airway mucins and defective mucociliary clearance in CFTR-deficient piglets
- Author
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Catherine Robbe-Masselot, Mustapha Si-Tahar, Ignacio S. Caballero, Renaud Léonard, Nicolas Pons, Andrea Bähr, Pascal Barbry, Antoine Guillon, Agnès Paquet, Claire Chevaleyre, Nikolai Klymiuk, Isabelle Fleurot, Mustapha Berri, Bélinda Ringot-Destrez, Kevin Lebrigand, Carole Baron, Céline Barc, Reuben Ramphal, Isabelle Lantier, Centre National de la Recherche Scientifique (CNRS), Université Côte d'Azur (UCA), Institut de pharmacologie moléculaire et cellulaire (IPMC), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Côte d'Azur (UCA), Infectiologie et Santé Publique (UMR ISP), Université de Tours (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre d’Etude des Pathologies Respiratoires (CEPR), UMR 1100 (CEPR), Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Service de Médecine Intensive et Réanimation [Tours], Plateforme d'Infectiologie Expérimentale (PFIE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Ludwig Maximilian University [Munich] (LMU), Association Vaincre la Mucoviscidose (Grant No. RF20150 501357), Association Grégory Lemarchal (Grant No. RIF20160501690), Fondation pour la Recherche Médicale (DEQ20180339158), ANR-11-LABX-0028,SIGNALIFE,Réseau d'Innovation sur les Voies de Signalisation en Sciences de la Vie(2011), ANR-10-INBS-0009,France-Génomique,Organisation et montée en puissance d'une Infrastructure Nationale de Génomique(2010), Chanteloup, Nathalie Katy, Centres d'excellences - Réseau d'Innovation sur les Voies de Signalisation en Sciences de la Vie - - SIGNALIFE2011 - ANR-11-LABX-0028 - LABX - VALID, Organisation et montée en puissance d'une Infrastructure Nationale de Génomique - - France-Génomique2010 - ANR-10-INBS-0009 - INBS - VALID, Université de Tours (UT), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Tours (UT), Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Gene Center and Center for Innovation Medical Models (CiMM), Ludwig Maximilians University of Munich, Université de Tours-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Tours-Institut National de la Santé et de la Recherche Médicale (INSERM), and Centre Hospitalier Régional Universitaire de Tours (CHRU TOURS)
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0301 basic medicine ,Pulmonary and Respiratory Medicine ,Male ,Glycosylation ,Mucociliary clearance ,Swine ,[SDV]Life Sciences [q-bio] ,Sus scrofa ,Cystic Fibrosis Transmembrane Conductance Regulator ,Context (language use) ,Inflammation ,Respiratory Mucosa ,Mucociliary transport ,medicine.disease_cause ,Cystic fibrosis ,Microbiology ,03 medical and health sciences ,0302 clinical medicine ,Medicine ,Animals ,CFTR ,ComputingMilieux_MISCELLANEOUS ,Lung ,medicine.diagnostic_test ,business.industry ,Pseudomonas aeruginosa ,Mucin ,Mucins ,respiratory system ,medicine.disease ,3. Good health ,respiratory tract diseases ,Trachea ,[SDV] Life Sciences [q-bio] ,Mucin glycosylation ,030104 developmental biology ,medicine.anatomical_structure ,Bronchoalveolar lavage ,030228 respiratory system ,Animals, Newborn ,Mucociliary Clearance ,Pediatrics, Perinatology and Child Health ,Female ,medicine.symptom ,MESH: CFTR ,business - Abstract
International audience; Background: Bacterial colonization in cystic fibrosis (CF) lungs has been directly associated to the loss of CFTR function, and/or secondarily linked to repetitive cycles of chronic inflammation/infection. We hypothesized that altered molecular properties of mucins could contribute to this process.Methods: Newborn CFTR+/+ and CFTR-/- were sacrificed before and 6 h after inoculation with luminescent Pseudomonas aeruginosa into the tracheal carina. Tracheal mucosa and the bronchoalveolar lavage (BAL) fluid were collected to determine the level of mucin O-glycosylation, bacteria binding to mucins and the airways transcriptome. Disturbances in mucociliary transport were determined by ex-vivo imaging of luminescent Pseudomonas aeruginosa.Results: We provide evidence of an increased sialylation of CF airway mucins and impaired mucociliary transport that occur before the onset of inflammation. Hypersialylation of mucins was reproduced on tracheal explants from non CF animals treated with GlyH101, an inhibitor of CFTR channel activity, indicating a causal relationship between the absence of CFTR expression and the sialylation of mucins. This increased sialylation was correlated to an increased adherence of P. aeruginosa to mucins. In vivo infection of newborn CF piglets by live luminescent P. aeruginosa demonstrated an impairment of mucociliary transport of this bacterium, with no evidence of pre-existing inflammation.Conclusions: Our results document for the first time in a well-defined CF animal model modifications that affect the O-glycan chains of mucins. These alterations precede infection and inflammation of airway tissues, and provide a favorable context for microbial development in CF lung that hallmarks this disease.
- Published
- 2020
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