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Yegen CH, Lambert M, Beurnier A, Montani D, Humbert M, Planès C, Boncoeur E, Voituron N, Antigny F. KCNK3 channel is important for the ventilatory response to hypoxia in rats. Respir Physiol Neurobiol 2023; 318:104164. [PMID: 37739151 DOI: 10.1016/j.resp.2023.104164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/30/2023] [Accepted: 09/17/2023] [Indexed: 09/24/2023]
Abstract
To clarify the contribution of KCNK3/TASK-1 channel chemoreflex in response to hypoxia and hypercapnia, we used a unique Kcnk3-deficient rat. We assessed ventilatory variables using plethysmography in Kcnk3-deficient and wild-type rats at rest in response to hypoxia (10% O2) and hypercapnia (4% CO2). Immunostaining for C-Fos, a marker of neuronal activity, was performed to identify the regions of the respiratory neuronal network involved in the observed response.Under basal conditions, we observed increased minute ventilation in Kcnk3-deficient rats, which was associated with increased c-Fos positive cells in the ventrolateral region of the medulla oblongata. Kcnk3-deficient rats show an increase in ventilatory response to hypoxia without changes in response to hypercapnia. In Kcnk3-deficient rats, linked to an increased hypoxia response, we observed a greater increase in c-Fos-positive cells in the first central relay of peripheral chemoreceptors and Raphe Obscurus. This study reports that KCNK3/TASK-1 deficiency in rats induces an inadequate peripheral chemoreflex, alternating respiratory rhythmogenesis, and hypoxic chemoreflex.
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Affiliation(s)
- Céline-Hivda Yegen
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris Nord, Bobigny, France
| | - Mélanie Lambert
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France
| | - Antoine Beurnier
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 " Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique ", Hôpital Marie Lannelongue, Le Plessis-Robinson, France; Service de Physiologie et d'explorations fonctionnelles, Hôpital Avicenne, APHP, Hôpitaux de Paris, France
| | - David Montani
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 " Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique ", Hôpital Marie Lannelongue, Le Plessis-Robinson, France; Assistance Publique - Hôpitaux de Paris (AP-HP), Service de Pneumologie et Soins Intensifs Respiratoires, Centre de Référence de l'Hypertension Pulmonaire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
| | - Marc Humbert
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 " Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique ", Hôpital Marie Lannelongue, Le Plessis-Robinson, France; Assistance Publique - Hôpitaux de Paris (AP-HP), Service de Pneumologie et Soins Intensifs Respiratoires, Centre de Référence de l'Hypertension Pulmonaire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
| | - Carole Planès
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, Department of Physiology - Functional Explorations, DMU Thorinno, bi-site Hôpital Bicêtre (Le Kremlin Bicêtre) and Ambroise Paré (Boulogne-Billancourt), France
| | - Emilie Boncoeur
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris Nord, Bobigny, France
| | - Nicolas Voituron
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris Nord, Bobigny, France; Département STAPS, Université Sorbonne Paris Nord, Bobigny, France.
| | - Fabrice Antigny
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France.
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Gille T, Sesé L, Planès C. Reply to Noel-Savina and collaborators: D M and V C impairment after COVID-19. Respir Med Res 2023; 83:100952. [PMID: 36563549 PMCID: PMC9420311 DOI: 10.1016/j.resmer.2022.100952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 02/06/2023]
Affiliation(s)
- Thomas Gille
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France; Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France.
| | - Lucile Sesé
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France,Inserm UMR 1272 “Hypoxie et Poumon,” UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Carole Planès
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France,Inserm UMR 1272 “Hypoxie et Poumon,” UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
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Yegen C, Lambert M, Montani D, Humbert M, Planès C, Boncoeur E, Voituron N, Antigny F. La mutation Kcnk3 altère les régulations ventilatoires chémosensibles chez le rat. Rev Mal Respir 2023. [DOI: 10.1016/j.rmr.2022.11.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Maakoul Z, Yegen C, Marchant D, Planès C, Boncoeur E, Voituron N. Répercussion sur le réseau neuronal respiratoire de l’effet aggravant de l’exposition à l’HIC sur la fibrose pulmonaire. Rev Mal Respir 2023. [DOI: 10.1016/j.rmr.2022.11.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Martinod E, Radu DM, Onorati I, Portela AMS, Peretti M, Guiraudet P, Destable MD, Uzunhan Y, Freynet O, Chouahnia K, Duchemann B, Kabbani J, Maurer C, Brillet PY, Fath L, Brenet E, Debry C, Buffet C, Leenhardt L, Clero D, Julien N, Vénissac N, Tronc F, Dutau H, Marquette CH, Juvin C, Lebreton G, Cohen Y, Zogheib E, Beloucif S, Planès C, Trésallet C, Bensidhoum M, Petite H, Rouard H, Miyara M, Vicaut E. Airway replacement using stented aortic matrices: Long-term follow-up and results of the TRITON-01 study in 35 adult patients. Am J Transplant 2022; 22:2961-2970. [PMID: 35778956 DOI: 10.1111/ajt.17137] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/14/2022] [Accepted: 06/23/2022] [Indexed: 01/25/2023]
Abstract
Over the past 25 years, we have demonstrated the feasibility of airway bioengineering using stented aortic matrices experimentally then in a first-in-human trial (n = 13). The present TRITON-01 study analyzed all the patients who had airway replacement at our center to confirm that this innovative approach can be now used as usual care. For each patient, the following data were prospectively collected: postoperative mortality and morbidity, late airway complications, stent removal and status at last follow-up on November 2, 2021. From October 2009 to October 2021, 35 patients had airway replacement for malignant (n = 29) or benign (n = 6) lesions. The 30-day postoperative mortality and morbidity rates were 2.9% (n = 1/35) and 22.9% (n = 8/35) respectively. At a median follow-up of 29.5 months (range 1-133 months), 27 patients were alive. There have been no deaths directly related to the implanted bioprosthesis. Eighteen patients (52.9%) had stent-related granulomas requiring a bronchoscopic treatment. Ten among 35 patients (28.6%) achieved a stent free survival. The actuarial 2- and 5-year survival rates (Kaplan-Meier estimates) were respectively 88% and 75%. The TRITON-01 study confirmed that airway replacement using stented aortic matrices can be proposed as usual care at our center. Clinicaltrials.gov Identifier: NCT04263129.
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Affiliation(s)
- Emmanuel Martinod
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Université Paris Cité, Fondation Alain Carpentier, Laboratoire de Recherche Bio-chirurgicale, AP-HP, Hôpital Européen Georges Pompidou, Paris, France
| | - Dana M Radu
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Université Paris Cité, Fondation Alain Carpentier, Laboratoire de Recherche Bio-chirurgicale, AP-HP, Hôpital Européen Georges Pompidou, Paris, France
| | - Ilaria Onorati
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Université Paris Cité, Fondation Alain Carpentier, Laboratoire de Recherche Bio-chirurgicale, AP-HP, Hôpital Européen Georges Pompidou, Paris, France
| | - Ana Maria Santos Portela
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Marine Peretti
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Patrice Guiraudet
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Marie-Dominique Destable
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Thoracique et Vasculaire, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Yurdagül Uzunhan
- Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Pneumologie, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Olivia Freynet
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Pneumologie, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Kader Chouahnia
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Oncologie, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Boris Duchemann
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Oncologie, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Jamal Kabbani
- Hôpital Le Raincy-Montfermeil, Pneumologie, Montfermeil, France
| | - Cyril Maurer
- Hôpital Le Raincy-Montfermeil, Pneumologie, Montfermeil, France
| | - Pierre-Yves Brillet
- Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France.,AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Radiologie, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Léa Fath
- Hôpitaux Universitaires de Strasbourg, Oto-Rhino-Laryngologie, Strasbourg, France
| | - Esteban Brenet
- Centre Hospitalier Universitaire de Reims, Oto-Rhino-Laryngologie, Reims, France
| | - Christian Debry
- Hôpitaux Universitaires de Strasbourg, Oto-Rhino-Laryngologie, Strasbourg, France
| | - Camille Buffet
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Endocrinologie, Paris, France
| | - Laurence Leenhardt
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Endocrinologie, Paris, France
| | - Dominique Clero
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Oto-Rhino-Laryngologie, Paris, France
| | - Nicolas Julien
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Oto-Rhino-Laryngologie, Paris, France
| | - Nicolas Vénissac
- Hôpitaux Universitaires de Lille, Chirurgie Thoracique, Lille, France
| | - François Tronc
- Hôpitaux Universitaires de Lyon, Chirurgie Thoracique, Lyon, France
| | - Hervé Dutau
- Assistance Publique - Hôpitaux de Marseille, Pneumologie, Hôpital Universitaire Nord, Marseille, France
| | | | - Charles Juvin
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Chirurgie Cardiaque, Paris, France
| | - Guillaume Lebreton
- AP-HP, Sorbonne Université, Hôpital La Pitié-Salpêtrière, Chirurgie Cardiaque, Paris, France
| | - Yves Cohen
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Réanimation, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Elie Zogheib
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Anesthésie-Réanimation, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Sadek Beloucif
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Anesthésie-Réanimation, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Carole Planès
- Inserm UMR1272, Hypoxie et Poumon, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | - Christophe Trésallet
- AP-HP, Hôpitaux Universitaires Paris Seine-Saint-Denis, Hôpital Avicenne, Chirurgie Digestive, Université Sorbonne Paris Nord, Faculté de Médecine SMBH, Bobigny, France
| | | | - Hervé Petite
- B3OA UMR CNRS 7052, Université Paris Cité CNRS, Paris, France
| | - Hélène Rouard
- AP-HP, EFS Ile de France, Banque des Tissus, La Plaine Saint-Denis, France
| | - Makoto Miyara
- Sorbonne Université, Inserm, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Département d'Immunologie, AP-HP, Hôpital Pitié-Salpêtrière, Paris, France
| | - Eric Vicaut
- AP-HP, Unité de Recherche Clinique, Hôpitaux Saint Louis-Lariboisière-Fernand Widal, Université Paris Cité, Paris, France
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Yegen CH, Haine L, Da Costa Ferreira K, Marchant D, Bernaudin JF, Planès C, Voituron N, Boncoeur E. A New Model of Acute Exacerbation of Experimental Pulmonary Fibrosis in Mice. Cells 2022; 11:3379. [PMID: 36359778 PMCID: PMC9654438 DOI: 10.3390/cells11213379] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/07/2022] [Accepted: 10/23/2022] [Indexed: 11/27/2023] Open
Abstract
RATIONALE idiopathic pulmonary fibrosis (IPF) is the most severe form of fibrosing interstitial lung disease, characterized by progressive respiratory failure leading to death. IPF's natural history is heterogeneous, and its progression unpredictable. Most patients develop a progressive decline of respiratory function over years; some remain stable, but others present a fast-respiratory deterioration without identifiable cause, classified as acute exacerbation (AE). OBJECTIVES to develop and characterize an experimental mice model of lung fibrosis AE, mimicking IPF-AE at the functional, histopathological, cellular and molecular levels. METHODS we established in C57BL/6 male mice a chronic pulmonary fibrosis using a repetitive low-dose bleomycin (BLM) intratracheal (IT) instillation regimen (four instillations of BLM every 2 weeks), followed by two IT instillations of a simple or double-dose BLM challenge to induce AE. Clinical follow-up and histological and molecular analyses were done for fibrotic and inflammatory lung remodeling analysis. MEASUREMENTS AND MAIN RESULTS as compared with a low-dose BLM regimen, this AE model induced a late burst of animal mortality, worsened lung fibrosis and remodeling, and superadded histopathological features as observed in humans IPF-AE. This was associated with stronger inflammation, increased macrophage infiltration of lung tissue and increased levels of pro-inflammatory cytokines in lung homogenates. Finally, it induced in the remodeled lung a diffuse expression of hypoxia-inducible factor 1α, a hallmark of tissular hypoxia response and a major player in the progression of IPF. CONCLUSION this new model is a promising model of AE in chronic pulmonary fibrosis that could be relevant to mimic IPF-AE in preclinical trials.
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Affiliation(s)
- Céline-Hivda Yegen
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Liasmine Haine
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Kevin Da Costa Ferreira
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Dominique Marchant
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Jean-Francois Bernaudin
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
- Faculté de Médecine, Sorbonne Université, 75006 Paris, France
- Service de Physiologie et d’Explorations Fonctionnelles, Hôpital Avicenne, APHP, 93000 Bobigny, France
| | - Carole Planès
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
- Service de Physiologie et d’Explorations Fonctionnelles, Hôpital Avicenne, APHP, 93000 Bobigny, France
| | - Nicolas Voituron
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
- Département STAPS, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Emilie Boncoeur
- Laboratoire Hypoxie & Poumon, UMR INSERM U1272, Université Sorbonne Paris-Nord, 93000 Bobigny, France
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Gille T, Sesé L, Aubourg E, Bernaudin JF, Richalet JP, Planès C. Is there a shift of the oxygen-hemoglobin dissociation curve in COVID-19? Am J Physiol Lung Cell Mol Physiol 2022; 322:L174-L175. [PMID: 35015569 PMCID: PMC8759957 DOI: 10.1152/ajplung.00390.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Thomas Gille
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Lucile Sesé
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Eric Aubourg
- Centre National de la Recherche Scientifique, CEA, Astroparticule et Cosmologie, Université de Paris, Paris, France
| | - Jean-François Bernaudin
- Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France.,Faculté de Médecine, Sorbonne Université, Paris, France
| | - Jean-Paul Richalet
- Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Carole Planès
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, Hôpitaux Universitaires de Paris Seine-Saint-Denis, Assistance Publique - Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
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Haine L, Bravais J, Yegen CH, Bernaudin JF, Marchant D, Planès C, Voituron N, Boncoeur E. Sleep Apnea in Idiopathic Pulmonary Fibrosis: A Molecular Investigation in an Experimental Model of Fibrosis and Intermittent Hypoxia. Life (Basel) 2021; 11:973. [PMID: 34575121 PMCID: PMC8466672 DOI: 10.3390/life11090973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND High prevalence of obstructive sleep apnea (OSA) is reported in incident and prevalent forms of idiopathic pulmonary fibrosis (IPF). We previously reported that Intermittent Hypoxia (IH), the major pathogenic element of OSA, worsens experimental lung fibrosis. Our objective was to investigate the molecular mechanisms involved. METHODS Impact of IH was evaluated on C57BL/6J mice developing lung fibrosis after intratracheal instillation of Bleomycin (BLM). Mice were Pre-exposed 14 days to IH before induction of lung fibrosis or Co-challenged with IH and BLM for 14 days. Weight loss and survival were daily monitored. After experimentations, lungs were sampled for histology, and protein and RNA were extracted. RESULTS Co-challenge or Pre-exposure of IH and BLM induced weight loss, increased tissue injury and collagen deposition, and pro-fibrotic markers. Major worsening effects of IH exposure on lung fibrosis were observed when mice were Pre-exposed to IH before developing lung fibrosis with a strong increase in sXBP1 and ATF6N ER stress markers. CONCLUSION Our results showed that IH exacerbates BLM-induced lung fibrosis more markedly when IH precedes lung fibrosis induction, and that this is associated with an enhancement of ER stress markers.
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Affiliation(s)
- Liasmine Haine
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
| | - Juliette Bravais
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
| | - Céline-Hivda Yegen
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
| | - Jean-Francois Bernaudin
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
- Faculté de Médecine, Sorbonne Université, 75012 Paris, France
| | - Dominique Marchant
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
| | - Carole Planès
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
- Service de Physiologie et d’Explorations Fonctionnelles, Hôpital Avicenne, APHP, Hôpitaux de Paris, 93000 Bobigny, France
| | - Nicolas Voituron
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
- Département STAPS, Université Sorbonne Paris-Nord, 93000 Bobigny, France
| | - Emilie Boncoeur
- UMR INSERM U1272 Hypoxie & Poumon, Université Sorbonne Paris Nord, 93017 Bobigny, France; (L.H.); (J.B.); (C.-H.Y.); (J.-F.B.); (D.M.); (C.P.); (N.V.)
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9
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Jeny F, Bernaudin JF, Valeyre D, Kambouchner M, Pretolani M, Nunes H, Planès C, Besnard V. Hypoxia Promotes a Mixed Inflammatory-Fibrotic Macrophages Phenotype in Active Sarcoidosis. Front Immunol 2021; 12:719009. [PMID: 34456926 PMCID: PMC8385772 DOI: 10.3389/fimmu.2021.719009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/26/2021] [Indexed: 11/30/2022] Open
Abstract
Background Macrophages are pivotal cells in sarcoidosis. Monocytes-derived (MD) macrophages have recently been demonstrated to play a major role especially in pulmonary sarcoidosis. From inflammatory tissues to granulomas, they may be exposed to low oxygen tension environments. As hypoxia impact on sarcoidosis immune cells has never been addressed, we designed the present study to investigate MD-macrophages from sarcoidosis patients in this context. We hypothesized that hypoxia may induce functional changes on MD-macrophages which could have a potential impact on the course of sarcoidosis. Methods We studied MD-macrophages, from high active sarcoidosis (AS) (n=26), low active or inactive sarcoidosis (IS) (n=24) and healthy controls (n=34) exposed 24 hours to normoxia (21% O2) or hypoxia (1.5% O2). Different macrophage functions were explored: hypoxia-inducible factor-1α (HIF-1α) and nuclear factor-kappa B (NF-κB) activation, cytokines secretion, phagocytosis, CD80/CD86/HLA-DR expression, profibrotic response. Results We observed that hypoxia, with a significantly more pronounced effect in AS compared with controls and IS, increased the HIF-1α trans-activity, promoted a proinflammatory response (TNFα, IL1ß) without activating NF-κB pathway and a profibrotic response (TGFß1, PDGF-BB) with PAI-1 secretion associated with human lung fibroblast migration inhibition. These results were confirmed by immunodetection of HIF-1α and PAI-1 in granulomas observed in pulmonary biopsies from patients with sarcoidosis. Hypoxia also decreased the expression of CD80/CD86 and HLA-DR on MD-macrophages in the three groups while it did not impair phagocytosis and the expression of CD36 expression on cells in AS and IS at variance with controls. Conclusions Hypoxia had a significant impact on MD-macrophages from sarcoidosis patients, with the strongest effect seen in patients with high active disease. Therefore, hypoxia could play a significant role in sarcoidosis pathogenesis by increasing the macrophage proinflammatory response, maintaining phagocytosis and reducing antigen presentation, leading to a deficient T cell response. In addition, hypoxia could favor fibrosis by promoting profibrotic cytokines response and by sequestering fibroblasts in the vicinity of granulomas.
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Affiliation(s)
- Florence Jeny
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,AP-HP, Pulmonology Department, Avicenne Hospital, Bobigny, France
| | - Jean-François Bernaudin
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,Faculty of Medicine, Sorbonne University, Paris, France
| | - Dominique Valeyre
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,AP-HP, Pulmonology Department, Avicenne Hospital, Bobigny, France
| | - Marianne Kambouchner
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,AP-HP, Pathology Department, Avicenne Hospital, Bobigny, France
| | - Marina Pretolani
- Inserm UMR1152, Physiopathology and Epidemiology of Respiratory Diseases, Paris, France.,Faculty of Medicine, Bichat Hospital, Paris University, Paris, France.,Laboratory of Excellence, INFLAMEX, Paris University, DHU FIRE, Paris, France
| | - Hilario Nunes
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,AP-HP, Pulmonology Department, Avicenne Hospital, Bobigny, France
| | - Carole Planès
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France.,AP-HP, Physiology Department, Avicenne Hospital, Bobigny, France
| | - Valérie Besnard
- INSERM UMR 1272, Sorbonne Paris-Nord University, Bobigny, France
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10
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Sesé L, Nunes H, Cottin V, Israel-Biet D, Crestani B, Guillot-Dudoret S, Cadranel J, Wallaert B, Tazi A, Maître B, Prévot G, Marchand-Adam S, Hirschi S, Dury S, Giraud V, Gondouin A, Bonniaud P, Traclet J, Juvin K, Borie R, Carton Z, Freynet O, Gille T, Planès C, Valeyre D, Uzunhan Y. Gender Differences in Idiopathic Pulmonary Fibrosis: Are Men and Women Equal? Front Med (Lausanne) 2021; 8:713698. [PMID: 34422868 PMCID: PMC8374893 DOI: 10.3389/fmed.2021.713698] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 07/09/2021] [Indexed: 12/23/2022] Open
Abstract
Background: Idiopathic pulmonary fibrosis (IPF) is characterized by a male predominance. The aim of the study was to explore gender differences in a well-designed French multicentre prospective IPF cohort (COhorte FIbrose, COFI) with a 5-year follow-up. Methods: Between 2007 and 2010, 236 patients with incident IPF were included in COFI. Gender characteristics were compared using a t-test, Chi-squared test and ANOVA, as appropriate. Survival analyses were performed. Results: Fifty-one (22%) females and 185 (78%) males with an average age at diagnosis of 70.1 ± 9.20 and 67.4 ± 10.9 years, respectively, were included in the cohort. Women were significantly less exposed to tobacco smoke [never n = 32 (62.7%) vs. n = 39 (21.1%), p < 0.001] and to occupational exposure [n = 7 (13.7%) vs. n = 63 (34.1%), p = 0.012]. Baseline forced vital capacity, % of predicted (FVC%) was significantly better in women compare to men (83.0% ± 25.0 v. 75.4% ± 18.7 p = 0.046). At presentation honeycombing and emphysema on CT scan were less common in women [n = 40 (78.4%) vs. n = 167 (90.3%) p = 0.041] and [n = 6 (11.8%) vs. n = 48 (25.9%) p = 0.029], respectively. During follow-up fewer women were transplanted compared to men [n = 1 (1.96%) vs. n = 20 (10.8%) p = 0.039]. Medians of survival were comparable by gender [31 months (CI 95%: 28–40) vs. 40 months (CI 95%: 33–72) p = 0.2]. After adjusting for age and FVC at inclusion, being a woman was not associated to a better survival. Conclusions: Women appear to have less advanced disease at diagnosis, maybe due to less exposure history compare to men. Disease progression and overall survival remains comparable regardless gender, but women have less access to lung transplantation.
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Affiliation(s)
- Lucile Sesé
- AP-HP, Service de Physiologie, Hôpital Avicenne, Bobigny, France.,Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France.,EPAR, IPLESP UMR-S 1136, INSERM et Sorbonne Université, Paris, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
| | - Hilario Nunes
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
| | - Vincent Cottin
- Centre Coordonnateur de Référence des Maladies Pulmonaires Rares, Hôpital Louis Pradel, Hospices Civils de Lyon, Université Lyon 1, Université de Lyon, INRAE, OrphaLung, Member of Respifil, ERN-LUNG, Lyon, France
| | - Dominique Israel-Biet
- Centre de Compétence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital HEGP, Paris, France
| | - Bruno Crestani
- Centre Constitutif de Référence des Maladies Pulmonaires Rares AP-HP, Service de Pneumologie, Hôpital Bichat, Paris, France
| | - Stephanie Guillot-Dudoret
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Hôpital Pontchaillou, Rennes, France
| | - Jacques Cadranel
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Tenon and Sorbonne University, Paris, France
| | - Benoit Wallaert
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, Service de Pneumologie, Hôpital Albert Calmette, Lille, France
| | - Abdellatif Tazi
- Université de Paris, Centre de Référence National des Histiocytoses, AP-HP, Service de Pneumologie, Hôpital Saint-Louis, Paris, France
| | - Bernard Maître
- AP-HP, Service de Pneumologie, Hôpital Henri-Mondor, Créteil, France
| | | | - Sylvain Marchand-Adam
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Hôpital Bretonneau, Tours, France
| | - Sandrine Hirschi
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Nouvel Hôpital Civil, Strasbourg, France
| | - Sandra Dury
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Hôpital Maison Blanche, Reims, France
| | - Violaine Giraud
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Nouvel Hôpital Civil, Strasbourg, France.,AP-HP, Service de Pneumologie, Hôpital Ambroise Paré, Boulogne, France
| | - Anne Gondouin
- Centre de Compétence des Maladies Pulmonaires Rares, Service de Pneumologie, Hôpital Jean Minjoz, Besançon, France
| | - Philippe Bonniaud
- Centre Constitutif de référence des Maladies Pulmonaires Rares, Service de Pneumologie, Centre Hospitalier Universitaire Dijon Bourgogne, Dijon, France
| | - Julie Traclet
- Centre Coordonnateur de Référence des Maladies Pulmonaires Rares, Hôpital Louis Pradel, Hospices Civils de Lyon, Université Lyon 1, Université de Lyon, INRAE, OrphaLung, Member of Respifil, ERN-LUNG, Lyon, France
| | - Karine Juvin
- Centre de Compétence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital HEGP, Paris, France
| | - Raphael Borie
- Centre Constitutif de Référence des Maladies Pulmonaires Rares AP-HP, Service de Pneumologie, Hôpital Bichat, Paris, France
| | - Zohra Carton
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France
| | - Olivia Freynet
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France
| | - Thomas Gille
- AP-HP, Service de Physiologie, Hôpital Avicenne, Bobigny, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
| | - Carole Planès
- AP-HP, Service de Physiologie, Hôpital Avicenne, Bobigny, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
| | - Dominique Valeyre
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
| | - Yurdagül Uzunhan
- Centre Constitutif de Référence des Maladies Pulmonaires Rares, AP-HP, Service de Pneumologie, Hôpital Avicenne, Bobigny, France.,INSERM UMR 1272 "Hypoxia and the Lung," Université Sorbonne Paris Nord, Bobigny, France
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11
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Hindré R, Jeny F, Kambouchner M, Bernaudin J, Valeyre D, Planès C, Besnard V. Expression de la voie Janus kinase (JAK)/signal transducteur et activateur de transcription (STAT) dans les cellules de granulome de sarcoïdose. Rev Mal Respir 2021. [DOI: 10.1016/j.rmr.2021.02.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Haine L, On CH, Bravais J, Planès C, Voituron N, Boncoeur E. Effet aggravant de l’hypoxie intermittente sur la fibrose pulmonaire : implication du stress du réticulum endoplasmique. Rev Mal Respir 2021. [DOI: 10.1016/j.rmr.2021.02.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Gille T, Sesé L, Aubourg E, Fabre EE, Cymbalista F, Ratnam KC, Valeyre D, Nunes H, Richalet JP, Planès C. The Affinity of Hemoglobin for Oxygen Is Not Altered During COVID-19. Front Physiol 2021; 12:578708. [PMID: 33912067 PMCID: PMC8072381 DOI: 10.3389/fphys.2021.578708] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 03/16/2021] [Indexed: 12/21/2022] Open
Abstract
Background: A computational proteomic analysis suggested that SARS-CoV-2 might bind to hemoglobin (Hb). The authors hypothesized that this phenomenon could result in a decreased oxygen (O2) binding and lead to hemolytic anemia as well. The aim of this work was to investigate whether the affinity of Hb for O2 was altered during COVID-19. Methods: In this retrospective, observational, single-center study, the blood gas analyses of 100 COVID-19 patients were compared to those of 100 non-COVID-19 patients. Fifty-five patients with carboxyhemoglobin (HbCO) ≥8% and 30 with sickle cell disease (SCD) were also included ("positive controls" with abnormal Hb affinity). P50 was corrected for body temperature, pH, and PCO2. Results: Patients did not differ statistically for age or sex ratio in COVID-19 and non-COVID-19 groups. Median P50 at baseline was 26 mmHg [25.2-26.8] vs. 25.9 mmHg [24-27.3], respectively (p = 0.42). As expected, P50 was 22.5 mmHg [21.6-23.8] in the high HbCO group and 29.3 mmHg [27-31.5] in the SCD group (p < 0.0001). Whatever the disease severity, samples from COVID-19 to non-COVID-19 groups were distributed on the standard O2-Hb dissociation curve. When considering the time-course of P50 between days 1 and 18 in both groups, no significant difference was observed. Median Hb concentration at baseline was 14 g.dl-1 [12.6-15.2] in the COVID-19 group vs. 13.2 g.dl-1 [11.4-14.7] in the non-COVID-19 group (p = 0.006). Among the 24 COVID-19 patients displaying anemia, none of them exhibited obvious biological hemolysis. Conclusion: There was no biological argument to support the hypothesis that SARS-CoV-2 could alter O2 binding to Hb.
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Affiliation(s)
- Thomas Gille
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Lucile Sesé
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Eric Aubourg
- CNRS, CEA, Astroparticule et Cosmologie, Université de Paris, Paris, France
| | - Emmanuelle E Fabre
- Laboratoire de Biochimie, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France.,Inserm UMR 978 ASIH, UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Florence Cymbalista
- Inserm UMR 978 ASIH, UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France.,Laboratoire d'Hématologie-Biologie, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - Kayaththiry Caroline Ratnam
- Laboratoire d'Hématologie-Biologie, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - Dominique Valeyre
- Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France.,Service de Pneumologie, Centre de Référence Maladies Pulmonaires Rares, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - Hilario Nunes
- Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France.,Service de Pneumologie, Centre de Référence Maladies Pulmonaires Rares, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - Jean-Paul Richalet
- Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
| | - Carole Planès
- Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France.,Inserm UMR 1272 "Hypoxie et Poumon," UFR SMBH Léonard de Vinci, Université Sorbonne Paris Nord, Bobigny, France
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14
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Jeny F, Uzunhan Y, Lacroix M, Gille T, Brillet PY, Nardi A, Bouvry D, Planès C, Nunes H, Valeyre D. Predictors of mortality in fibrosing pulmonary sarcoidosis. Respir Med 2020; 169:105997. [PMID: 32442108 DOI: 10.1016/j.rmed.2020.105997] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/14/2020] [Accepted: 04/27/2020] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Pulmonary fibrosing sarcoidosis is associated with increased mortality. This study was aimed to explore the prognosis value of a panel of parameters for predicting mortality. METHODS This retrospective study included 216 patients with confirmed stage 4 pulmonary sarcoidosis. Stage 4 diagnosis date served as baseline. The following information was systematically present at baseline: epidemiological characteristics; treatments; pulmonary function; composite physiologic index (CPI); systolic pulmonary artery pressure at echocardiography; pulmonary fibrosis extent, main pulmonary artery/ascending aorta diameters ratio (MPAD/AAD) and MPAD/body surface area (BSA) measured and calculated using computed tomography, Walsh's algorithm based on CPI, lung fibrosis extent and MPAD/AAD ratio, and modified Walsh's algorithm with MPAD/BSA replacing MPAD/AAD allowed to estimate good or bad prognosis profiles. The primary outcome of the study was all cause mortality and lung transplantation. The value of baseline parameters was tested as predictors of mortality using univariate and multivariate analyses. RESULTS Median follow-up was 105 months. There were 41 deaths and 5 transplantations. At multivariate analysis, survival was independently predicted by several parameters including CPI, lung fibrosis extent, pulmonary hypertension at echography or MPAD/BSA ratio, Walsh's algorithm, and geographic origin. The modified Walsh's algorithm was most highly predictive. CONCLUSION Survival was best predicted by geographic origin, lung fibrosis extent, PH at echography or MPAD/BSA ratio, as well as by various scores among them the modified Walsh's algorithm had very high predictive value thanks to MPAD/BSA ratio which accurately predicted mortality.
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Affiliation(s)
- Florence Jeny
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de pneumologie, hôpital Avicenne, Bobigny, France.
| | - Yurdagül Uzunhan
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de pneumologie, hôpital Avicenne, Bobigny, France
| | - Maxime Lacroix
- AP-HP, service de radiologie, hôpital Avicenne, Bobigny, France
| | - Thomas Gille
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de physiologie et explorations fonctionnelles, hôpital Avicenne, Bobigny, France
| | - Pierre-Yves Brillet
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de radiologie, hôpital Avicenne, Bobigny, France
| | - Annelyse Nardi
- Service de Pneumologie, CH Général Delafontaine, Saint-Denis, France
| | - Diane Bouvry
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de pneumologie, hôpital Avicenne, Bobigny, France
| | - Carole Planès
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de physiologie et explorations fonctionnelles, hôpital Avicenne, Bobigny, France
| | - Hilario Nunes
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de pneumologie, hôpital Avicenne, Bobigny, France
| | - Dominique Valeyre
- INSERM UMR 1272, Université Sorbonne Paris Nord, Bobigny, France; AP-HP, service de pneumologie, hôpital Avicenne, Bobigny, France
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15
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Jeny F, Bernaudin JF, Valeyre D, Nunes H, Planès C, Besnard V. [Is hypoxia a factor in the progression of pulmonary sarcoidosis?]. Rev Mal Respir 2020; 37:214-217. [PMID: 32146058 DOI: 10.1016/j.rmr.2020.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 01/12/2020] [Indexed: 11/15/2022]
Abstract
Sarcoidosis is a systemic granulomatous disease that can reduce life expectancy mainly due to pulmonary fibrosis resulting from granulomatous inflammation The lack of vascularization within pulmonary granulomas suggests that macrophages localized in the center of these structures are hypoxic. Hypoxia signaling pathways are known to be pro-inflammatory and pro-fibrotic in various pathological conditions. Recent data suggest an involvement of the transcription factor hypoxia-inducible factor (HIF) in the pathogenesis of sarcoidosis. This could represent a new research approach for the understanding and therapeutic management of sarcoidosis.
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Affiliation(s)
- F Jeny
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France; Service de pneumologie, hôpital Avicenne AP-HP, Bobigny, France.
| | - J-F Bernaudin
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France; Service de pneumologie, hôpital Avicenne AP-HP, Bobigny, France; Faculté de médecine, Sorbonne université, Paris, France
| | - D Valeyre
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France; Service de pneumologie, hôpital Avicenne AP-HP, Bobigny, France
| | - H Nunes
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France; Service de pneumologie, hôpital Avicenne AP-HP, Bobigny, France
| | - C Planès
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France; Service d'explorations fonctionnelles, hôpital Avicenne AP-HP, Bobigny, France
| | - V Besnard
- UMR 1272 hypoxie & poumon, Inserm-université Paris 13, SMBH, Bobigny, France
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16
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Delbrel E, Uzunhan Y, Soumare A, Gille T, Marchant D, Planès C, Boncoeur E. ER Stress is Involved in Epithelial-To-Mesenchymal Transition of Alveolar Epithelial Cells Exposed to a Hypoxic Microenvironment. Int J Mol Sci 2019; 20:ijms20061299. [PMID: 30875855 PMCID: PMC6470993 DOI: 10.3390/ijms20061299] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/01/2019] [Accepted: 03/07/2019] [Indexed: 12/27/2022] Open
Abstract
Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive and fatal interstitial lung disease of unknown origin. Alveolar epithelial cells (AECs) play an important role in the fibrotic process as they undergo sustained endoplasmic reticulum (ER) stress, and may acquire a mesenchymal phenotype through epithelial-to-mesenchymal transition (EMT), two phenomena that could be induced by localized alveolar hypoxia. Here we investigated the potential links between hypoxia, ER stress and EMT in AECs. Methods: ER stress and EMT markers were assessed by immunohistochemistry, western blot and qPCR analysis, both in vivo in rat lungs exposed to normoxia or hypoxia (equivalent to 8% O2) for 48 h, and in vitro in primary rat AECs exposed to normoxia or hypoxia (1.5% O2) for 2–6 days. Results: Hypoxia induced expression of mesenchymal markers, pro-EMT transcription factors, and the activation of ER stress markers both in vivo in rat lungs, and in vitro in AECs. In vitro, pharmacological inhibition of ER stress by 4-PBA limited hypoxia-induced EMT. Calcium chelation or hypoxia-inducible factor (HIF) inhibition also prevented EMT induction under hypoxic condition. Conclusions: Hypoxia and intracellular calcium are both involved in EMT induction of AECs, mainly through the activation of ER stress and HIF signaling pathways.
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Affiliation(s)
- Eva Delbrel
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
| | - Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
- Assistance Publique Hôpitaux de Paris (APHP), Hôpital Avicenne, F-93017 Bobigny, France.
| | - Abdoulaye Soumare
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
| | - Thomas Gille
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
- Assistance Publique Hôpitaux de Paris (APHP), Hôpital Avicenne, F-93017 Bobigny, France.
| | - Dominique Marchant
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
- Assistance Publique Hôpitaux de Paris (APHP), Hôpital Avicenne, F-93017 Bobigny, France.
| | - Emilie Boncoeur
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (Inserm U1272), F-93017 Bobigny, France.
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Delbrel E, Soumare A, Naguez A, Label R, Bernard O, Bruhat A, Fafournoux P, Tremblais G, Marchant D, Gille T, Bernaudin JF, Callard P, Kambouchner M, Martinod E, Valeyre D, Uzunhan Y, Planès C, Boncoeur E. HIF-1α triggers ER stress and CHOP-mediated apoptosis in alveolar epithelial cells, a key event in pulmonary fibrosis. Sci Rep 2018; 8:17939. [PMID: 30560874 PMCID: PMC6299072 DOI: 10.1038/s41598-018-36063-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/09/2018] [Indexed: 12/28/2022] Open
Abstract
Endoplasmic Reticulum (ER) stress of alveolar epithelial cells (AECs) is recognized as a key event of cell dysfunction in pulmonary fibrosis (PF). However, the mechanisms leading to AECs ER stress and ensuing unfolded protein response (UPR) pathways in idiopathic PF (IPF) remain unclear. We hypothesized that alveolar hypoxic microenvironment would generate ER stress and AECs apoptosis through the hypoxia-inducible factor-1α (HIF-1α). Combining ex vivo, in vivo and in vitro experiments, we investigated the effects of hypoxia on the UPR pathways and ER stress-mediated apoptosis, and consecutively the mechanisms linking hypoxia, HIF-1α, UPR and apoptosis. HIF-1α and the pro-apoptotic ER stress marker C/EBP homologous protein (CHOP) were co-expressed in hyperplastic AECs from bleomycin-treated mice and IPF lungs, not in controls. Hypoxic exposure of rat lungs or primary rat AECs induced HIF-1α, CHOP and apoptosis markers expression. In primary AECs, hypoxia activated UPR pathways. Pharmacological ER stress inhibitors and pharmacological inhibition or silencing of HIF-1α both prevented hypoxia-induced upregulation of CHOP and apoptosis. Interestingly, overexpression of HIF-1α in normoxic AECs increased UPR pathways transcription factors activities, and CHOP expression. These results indicate that hypoxia and HIF-1α can trigger ER stress and CHOP-mediated apoptosis in AECs, suggesting their potential contribution to the development of IPF.
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Affiliation(s)
- Eva Delbrel
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Abdoulaye Soumare
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Adnan Naguez
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Rabab Label
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Olivier Bernard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Alain Bruhat
- Institut National de la Recherche Agronomique (INRA), UMR-1019 Nutrition Humaine, Centre INRA Auvergne Rhône-Alpes, Clermont Auvergne Université, 63122, Saint Genès Champanelle, France
| | - Pierre Fafournoux
- Institut National de la Recherche Agronomique (INRA), UMR-1019 Nutrition Humaine, Centre INRA Auvergne Rhône-Alpes, Clermont Auvergne Université, 63122, Saint Genès Champanelle, France
| | - Geoffrey Tremblais
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Dominique Marchant
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Thomas Gille
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Jean-François Bernaudin
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France.,Sorbonne Université, Faculté de Médecine, 75013, Paris, France
| | - Patrice Callard
- Sorbonne Université, Faculté de Médecine, 75013, Paris, France
| | | | - Emmanuel Martinod
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Dominique Valeyre
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Emilie Boncoeur
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.
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18
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Besnard V, Calender A, Bouvry D, Pacheco Y, Chapelon-Abric C, Jeny F, Nunes H, Planès C, Valeyre D. G908R NOD2 variant in a family with sarcoidosis. Respir Res 2018; 19:44. [PMID: 29554915 PMCID: PMC5859391 DOI: 10.1186/s12931-018-0748-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 03/13/2018] [Indexed: 12/16/2022] Open
Abstract
Background Sarcoidosis is a systemic disease characterized by the formation of immune granulomas in various organs, mainly the lungs and the lymphatic system. Exaggerated granulomatous reaction might be triggered in response to unidentified antigens in individuals with genetic susceptibility. The present study aimed to determine the genetic variants implicated in a familial case of sarcoidosis. Methods Sarcoidosis presentation and history, NOD2 profile, NF-κB and cytokine production in blood monocytes/macrophages were evaluated in individuals from a family with late appearance of sarcoidosis. Results In the present study, we report a case of familial sarcoidosis with typical thoracic sarcoidosis and carrying the NOD2 2722G > C variant. This variant is associated with the presence of three additional SNPs for the IL17RA, KALRN and EPHA2 genes, which discriminate patients expressing the disease from others. Despite a decrease in NF-κB activity, IL-8 and TNF-A mRNA levels were increased at baseline and in stimulated conditions. Conclusions Combination of polymorphisms in the NOD2, IL17RA, EPHA2 and KALRN genes could play a significant role in the development of sarcoidosis by maintaining a chronic pro-inflammatory status in macrophages. Electronic supplementary material The online version of this article (10.1186/s12931-018-0748-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Valérie Besnard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.
| | - Alain Calender
- Génétique des cancers et maladies multifactorielles, Hospices Civils de Lyon, GHE, Centre de Biologie et Pathologie ES, Bron, France
| | - Diane Bouvry
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.,AP-HP, Hôpital Avicenne, Bobigny, France
| | - Yves Pacheco
- Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Université Claude Bernard - Lyon 1, EA-7426, Lyon, France.,Université Claude Bernard Lyon 1 - EA-7426, 165 Chemin du Grand Revoyet, F-69495, Pierre Benite, France
| | - Catherine Chapelon-Abric
- Department of Internal Medicine and Clinical Immunology, Groupe Hospitalier La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Florence Jeny
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.,AP-HP, Hôpital Avicenne, Bobigny, France
| | - Hilario Nunes
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.,AP-HP, Hôpital Avicenne, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.,AP-HP, Hôpital Avicenne, Bobigny, France
| | - Dominique Valeyre
- Université Paris 13, Sorbonne Paris Cité, Laboratoire EA2363 "Hypoxie et Poumon", 74 rue Marcel Cachin, 93017, Bobigny cedex, France.,AP-HP, Hôpital Avicenne, Bobigny, France
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19
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Bernard O, Jeny F, Uzunhan Y, Dondi E, Terfous R, Label R, Sutton A, Larghero J, Vanneaux V, Nunes H, Boncoeur E, Planès C, Dard N. Mesenchymal stem cells reduce hypoxia-induced apoptosis in alveolar epithelial cells by modulating HIF and ROS hypoxic signaling. Am J Physiol Lung Cell Mol Physiol 2017; 314:L360-L371. [PMID: 29167125 DOI: 10.1152/ajplung.00153.2017] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Distal lung diseases, such as pulmonary fibrosis or acute lung injury, are commonly associated with local alveolar hypoxia that may be deleterious through the stimulation of alveolar epithelial cell (AEC) apoptosis. In various murine models of alveolar injury, administration of allogenic human mesenchymal stem cells (hMSCs) exerts an overall protective paracrine effect, limiting lung inflammation and fibrosis. However, the precise mechanisms on lung cells themselves remain poorly understood. Here, we investigated whether hMSC-conditioned medium (hMSC-CM) would protect AECs from hypoxia-induced apoptosis and explored the mechanisms involved in this cytoprotective effect. Exposure of rat primary AECs to hypoxia (1.5% O2 for 24 h) resulted in hypoxia-inducible factor (HIF)-1α protein stabilization, partly dependent on reactive oxygen species (ROS) accumulation, and in a twofold increase in AEC apoptosis that was prevented by the HIF inhibitor 3-(5'-hydroxymethyl-2'-furyl)-1-benzyl-indazole and the antioxidant drug N-acetyl cysteine. Incubation of AECs with hMSC-CM significantly reduced hypoxia-induced apoptosis. hMSC-CM decreased HIF-1α protein expression, as well as ROS accumulation through an increase in antioxidant enzyme activities. Expression of Bnip3 and CHOP, two proapoptotic targets of HIF-1α and ROS pathways, respectively, was suppressed by hMSC-CM, while Bcl-2 expression was restored. The paracrine protective effect of hMSC was partly dependent on keratinocyte growth factor and hepatocyte growth factor secretion, preventing ROS and HIF-1α accumulation.
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Affiliation(s)
- Olivier Bernard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France
| | - Florence Jeny
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France.,Assistance publique-Hôpitaux de Paris, Hôpital Avicenne, Bobigny, France
| | - Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France.,Assistance publique-Hôpitaux de Paris, Hôpital Avicenne, Bobigny, France
| | - Elisabetta Dondi
- Institut National de la Santé et de la Recherche Médicale, UMR 978, Bobigny, France
| | - Rahma Terfous
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France
| | - Rabab Label
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France
| | - Angela Sutton
- Institut National de la Santé et de la Recherche Médicale, UMR 1148, Laboratory for Vascular Translational Science, UFR Santé Médecine et Biologie Humaine, Université Paris 13, Sorbonne Paris Cité, Groupe Biothérapies et Glycoconjugués, Bobigny, France
| | - Jérôme Larghero
- AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et Centre d'Investigation Clinique de Biothérapies, Paris, France, Université Paris Diderot, Sorbonne Paris Cité, Paris , France
| | - Valérie Vanneaux
- AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et Centre d'Investigation Clinique de Biothérapies, Paris, France, Université Paris Diderot, Sorbonne Paris Cité, Paris , France
| | - Hilario Nunes
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France.,Assistance publique-Hôpitaux de Paris, Hôpital Avicenne, Bobigny, France
| | - Emilie Boncoeur
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France.,Assistance publique-Hôpitaux de Paris, Hôpital Avicenne, Bobigny, France
| | - Nicolas Dard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, EA 2363, Bobigny, France
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20
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Uzunhan Y, Nunes H, Jeny F, Lacroix M, Brun S, Brillet PY, Martinod E, Carette MF, Bouvry D, Charlier C, Lanternier F, Planès C, Tazi A, Lortholary O, Baughman RP, Valeyre D. Chronic pulmonary aspergillosis complicating sarcoidosis. Eur Respir J 2017; 49:49/6/1602396. [DOI: 10.1183/13993003.02396-2016] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 02/18/2017] [Indexed: 11/05/2022]
Abstract
Chronic pulmonary aspergillosis (CPA) complicating sarcoidosis (SA) is associated with high mortality, and there is a lack of clarity regarding the relative contributions of SA or CPA.This was a retrospective single-centre study on CPA-SA.In total, 65 patients (44 men), aged 41.4±13.5 and 48.3±11.9 years at the time of SA and CPA diagnoses, respectively, were included between 1980 and 2015. Of these, 64 had fibrocystic SA, most often advanced, with composite physiological index (CPI) >40 (65% of patients) and pulmonary hypertension (PH) (31%), and 41 patients (63%) were treated for SA (corticosteroids or immunosuppressive drugs). Chronic cavitary pulmonary aspergillosis (CCPA) was the most frequent CPA pattern. Regarding treatment, 55 patients required long-term antifungals, 14 interventional radiology, 11 resection surgery and two transplantation. Nearly half of the patients (27; 41.5%) died (mean age 55.8 years); 73% of the patients achieved 5-year survival and 61% 10-year survival. Death most often resulted from advanced SA and rarely from haemoptysis. CPI, fibrosis extent and PH predicted survival. Comparison with paired healthy controls without CPA did not show any difference in survival, but a higher percentage of patients had high-risk mould exposure.CPA occurs in advanced pulmonary SA. CPA-SA is associated with high mortality due to the underlying advanced SA rather than to the CPA. CPI, fibrosis extent and PH best predict outcome.
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Gille T, Didier M, Boubaya M, Moya L, Sutton A, Carton Z, Baran-Marszak F, Sadoun-Danino D, Israël-Biet D, Cottin V, Gagnadoux F, Crestani B, d'Ortho MP, Brillet PY, Valeyre D, Nunes H, Planès C. Obstructive sleep apnoea and related comorbidities in incident idiopathic pulmonary fibrosis. Eur Respir J 2017; 49:49/6/1601934. [DOI: 10.1183/13993003.01934-2016] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 02/28/2017] [Indexed: 11/05/2022]
Abstract
The objectives of this prospective study were: 1) to determine the prevalence and determinants of obstructive sleep apnoea (OSA) in patients with newly diagnosed idiopathic pulmonary fibrosis (IPF); 2) to determine whether OSA was associated with cardiovascular disease (CVD) as well as increased oxidative stress and levels of IPF biomarkers in the blood.A group of 45 patients with newly diagnosed IPF attended polysomnography. The prevalence of CVD and the severity of coronary artery calcification were investigated by high-resolution computed tomography. The levels of 8-hydroxydeoxyguanosine (8-OH-DG) and various IPF biomarkers in the blood were compared between patients with no or mild OSA (apnoea–hypopnoea index (AHI) <15 events·h−1), with moderate OSA (15 ≤AHI <30 events·h−1) and with severe OSA (AHI ≥30 events·h−1).The prevalence of moderate-to-severe OSA and severe OSA was 62% and 40%, respectively. AHI did not correlate with demographic or physiological data. All patients with severe OSA had a medical history of CVD,versus41.2% and 40% of those with no or mild OSA, or with moderate OSA, respectively (p<0.0001). Ischaemic heart disease (IHD) and moderate-to-severe coronary artery calcifications were strongly associated with severe OSA. The 8-OH-DG and matrix metalloproteinase-7 serum levels were significantly increased in the severe OSA group.Moderate-to-severe OSA is highly prevalent in incident IPF and severe OSA is strongly associated with the presence of CVD, particularly IHD.
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22
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Delbrel E, Soumaré A, Marchand D, Gille T, Planès C, Boncoeur E. Hypoxie et stress du réticulum endoplasmique dans la fibrose pulmonaire idiopathique : interconnexion des voies HIF et CHOP dans les cellules épithéliales alvéolaires. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Delbrel E, Soumaré A, Gille T, Marchand D, Planès C, Boncoeur. É. Hypoxie et stress du RE dans la FPI : interconnexion des voies HIF et CHOP dans les cellules épithéliales alvéolaires. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Uzunhan Y, Nunes H, Brillet P, Brun S, Martinod E, Carette M, Charlier C, Bouvry D, Planès C, Tazi A, Lortholary O, Valeyre D. Aspergillose pulmonaire chronique (APC) sur sarcoïdose : présentation, morbimortalité et traitement ; une série de 65 cas. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Sarcoidosis is a systemic disease, with lung involvement in almost all cases. Abnormal chest radiography is usually a key step for considering diagnosis. Lung impact is investigated through imaging; pulmonary function; and, when required, 6-minute walk test, cardiopulmonary exercise testing, or right heart catheterization. There is usually a reduction of lung volumes, and forced vital capacity is the most accurate parameter to reflect the impact of pulmonary sarcoidosis with or without pulmonary infiltration at imaging. Various evolution patterns have been described. Increased risk of death is associated with advanced pulmonary fibrosis or cor pulmonale, particularly in African American patients.
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Affiliation(s)
- Dominique Valeyre
- EA2363, University Paris 13, COMUE Sorbonne-Paris-Cité, 74 rue Marcel Cachin, Bobigny 93009, France; Assistance Publique Hôpitaux de Paris, Pulmonary Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France.
| | - Jean-François Bernaudin
- Assistance Publique Hôpitaux de Paris, Pathology Department, Tenon Universitary Hospital, 4 rue de la Chine, Paris 75020, France
| | - Florence Jeny
- EA2363, University Paris 13, COMUE Sorbonne-Paris-Cité, 74 rue Marcel Cachin, Bobigny 93009, France; Assistance Publique Hôpitaux de Paris, Pulmonary Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
| | - Boris Duchemann
- Assistance Publique Hôpitaux de Paris, Pulmonary Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
| | - Olivia Freynet
- Assistance Publique Hôpitaux de Paris, Pulmonary Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
| | - Carole Planès
- EA2363, University Paris 13, COMUE Sorbonne-Paris-Cité, 74 rue Marcel Cachin, Bobigny 93009, France; Assistance Publique Hôpitaux de Paris, Physiology Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
| | - Marianne Kambouchner
- Assistance Publique Hôpitaux de Paris, Pathology Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
| | - Hilario Nunes
- EA2363, University Paris 13, COMUE Sorbonne-Paris-Cité, 74 rue Marcel Cachin, Bobigny 93009, France; Assistance Publique Hôpitaux de Paris, Pulmonary Department, Avicenne Universitary Hospital, 125 rue de Stalingrad, Bobigny 93009, France
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Uzunhan Y, Bernard O, Marchant D, Dard N, Vanneaux V, Larghero J, Gille T, Clerici C, Valeyre D, Nunes H, Boncoeur E, Planès C. Mesenchymal stem cells protect from hypoxia-induced alveolar epithelial-mesenchymal transition. Am J Physiol Lung Cell Mol Physiol 2016; 310:L439-51. [DOI: 10.1152/ajplung.00117.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 12/22/2015] [Indexed: 01/13/2023] Open
Abstract
Administration of bone marrow-derived human mesenchymal stem cells (hMSC) reduces lung inflammation, fibrosis, and mortality in animal models of lung injury, by a mechanism not completely understood. We investigated whether hMSC would prevent epithelial-mesenchymal transition (EMT) induced by hypoxia in primary rat alveolar epithelial cell (AEC). In AEC cultured on semipermeable filters, prolonged hypoxic exposure (1.5% O2 for up to 12 days) induced phenotypic changes consistent with EMT, i.e., a change in cell morphology, a decrease in transepithelial resistance (Rte) and in the expression of epithelial markers [zonula occludens-1 (ZO-1), E-cadherin, AQP-5, TTF-1], together with an increase in mesenchymal markers [vimentin, α-smooth muscle actin (α-SMA)]. Expression of transcription factors driving EMT such as SNAIL1, ZEB1, and TWIST1 increased after 2, 24, and 48 h of hypoxia, respectively. Hypoxia also induced TGF-β1 mRNA expression and the secretion of active TGF-β1 in apical medium, and the expression of connective tissue growth factor (CTGF), two inducers of EMT. Coculture of AEC with hMSC partially prevented the decrease in Rte and in ZO-1, E-cadherin, and TTF-1 expression, and the increase in vimentin expression induced by hypoxia. It also abolished the increase in TGF-β1 expression and in TGF-β1-induced genes ZEB1, TWIST1, and CTGF. Finally, incubation with human recombinant KGF at a concentration similar to what was measured in hMSC-conditioned media restored the expression of TTF-1 and prevented the increase in TWIST1, TGF-β1, and CTGF in hypoxic AEC. Our results indicate that hMSC prevent hypoxia-induced alveolar EMT through the paracrine modulation of EMT signaling pathways and suggest that this effect is partly mediated by KGF.
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Affiliation(s)
- Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
- AP-HP, Hôpital Avicenne, Bobigny, France
| | - Olivier Bernard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
| | - Dominique Marchant
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
| | - Nicolas Dard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
| | - Valérie Vanneaux
- AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et CIC de Biothérapies, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Jérôme Larghero
- AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et CIC de Biothérapies, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Thomas Gille
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
- AP-HP, Hôpital Avicenne, Bobigny, France
| | - Christine Clerici
- Université Paris Diderot, Sorbonne Paris Cité, Inserm U1152, Paris, France; and
- AP-HP, Hôpital Bichat, Paris, France
| | - Dominique Valeyre
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
- AP-HP, Hôpital Avicenne, Bobigny, France
| | - Hilario Nunes
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
- AP-HP, Hôpital Avicenne, Bobigny, France
| | - Emilie Boncoeur
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire Hypoxie & Poumon, Bobigny, France
- AP-HP, Hôpital Avicenne, Bobigny, France
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Gille T, Boubaya M, Moya L, Lamberto C, Brillet P, Valeyre D, Planès C, Nunes H. Impact pronostique des composantes de la DLCO (Dm et Vc) dans la fibrose pulmonaire idiopathique. Rev Mal Respir 2016. [DOI: 10.1016/j.rmr.2015.10.719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Moya L, Gille T, Boubaya M, Bertrand G, Planès C, Valeyre D, Lamberto C, Nunes H, Brillet P. Impact pronostique des mesures tomodensitométriques dans la fibrose pulmonaire idiopathique. Rev Mal Respir 2016. [DOI: 10.1016/j.rmr.2015.10.718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Didier M, Gille T, Boncoeur E, Nunes H, Planès C. Effet de l’hypoxie intermittente chronique sur la fibrose pulmonaire induite par la bléomycine chez la souris. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2014.10.709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Jeny F, Planès C, Dard N. Effet protecteur des cellules souches mésenchymateuses sur les cellules épithéliales alvéolaires hypoxiques par modulation de la balance oxydant/antioxydant. Rev Mal Respir 2014. [DOI: 10.1016/j.rmr.2014.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gille T, Randrianarison-Pellan N, Goolaerts A, Dard N, Uzunhan Y, Ferrary E, Hummler E, Clerici C, Planès C. Hypoxia-induced inhibition of epithelial Na(+) channels in the lung. Role of Nedd4-2 and the ubiquitin-proteasome pathway. Am J Respir Cell Mol Biol 2014; 50:526-37. [PMID: 24093724 DOI: 10.1165/rcmb.2012-0518oc] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Transepithelial sodium transport via alveolar epithelial Na(+) channels (ENaC) and Na(+),K(+)-ATPase constitutes the driving force for removal of alveolar edema fluid. Alveolar hypoxia associated with pulmonary edema may impair ENaC activity and alveolar Na(+) absorption through a decrease of ENaC subunit expression at the apical membrane of alveolar epithelial cells (AECs). Here, we investigated the mechanism(s) involved in this process in vivo in the β-Liddle mouse strain mice carrying a truncation of β-ENaC C-terminus abolishing the interaction between β-ENaC and the ubiquitin protein-ligase Nedd4-2 that targets the channel for endocytosis and degradation and in vitro in rat AECs. Hypoxia (8% O2 for 24 h) reduced amiloride-sensitive alveolar fluid clearance by 69% in wild-type mice but had no effect in homozygous mutated β-Liddle littermates. In vitro, acute exposure of AECs to hypoxia (0.5-3% O2 for 1-6 h) rapidly decreased transepithelial Na(+) transport as assessed by equivalent short-circuit current Ieq and the amiloride-sensitive component of Na(+) current across the apical membrane, reflecting ENaC activity. Hypoxia induced a decrease of ENaC subunit expression in the apical membrane of AECs with no change in intracellular expression and induced a 2-fold increase in α-ENaC polyubiquitination. Hypoxic inhibition of amiloride-sensitive Ieq was fully prevented by preincubation with the proteasome inhibitors MG132 and lactacystin or with the antioxidant N-acetyl-cysteine. Our data strongly suggest that Nedd4-2-mediated ubiquitination of ENaC leading to endocytosis and degradation of apical Na(+) channels is a key feature of hypoxia-induced inhibition of transepithelial alveolar Na(+) transport.
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Affiliation(s)
- Thomas Gille
- 1 Université Paris 13, Sorbonne Paris Cité, Laboratoire Réponses Cellulaires et Fonctionnelles à l'Hypoxie (EA 2363), Bobigny, France
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Goolaerts A, Pellan-Randrianarison N, Larghero J, Vanneaux V, Uzunhan Y, Gille T, Dard N, Planès C, Matthay MA, Clerici C. Conditioned media from mesenchymal stromal cells restore sodium transport and preserve epithelial permeability in an in vitro model of acute alveolar injury. Am J Physiol Lung Cell Mol Physiol 2014; 306:L975-85. [PMID: 24682451 DOI: 10.1152/ajplung.00242.2013] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) or their media (MSC-M) were reported to reverse acute lung injury (ALI)-induced decrease of alveolar fluid clearance. To determine the mechanisms by which MSC-M exert their beneficial effects, an in vitro model of alveolar epithelial injury was created by exposing primary rat alveolar epithelial cells (AECs) to hypoxia (3% O2) plus cytomix, a combination of IL-1β, TNF-α, and IFN-γ. MSC-M were collected from human MSCs exposed for 12 h to either normoxia (MSC-M) or to hypoxia plus cytomix (HCYT-MSC-M). This latter condition was used to model the effect of alveolar inflammation and hypoxia on paracrine secretion of MSCs in the injured lung. Comparison of paracrine soluble factors in MSC media showed that the IL-1 receptor antagonist and prostaglandin E2 were markedly increased while keratinocyte growth factor (KGF) was twofold lower in HCYT-MSC-M compared with MSC-M. In AECs, hypoxia plus cytomix increased protein permeability, reduced amiloride-sensitive short-circuit current (AS-Isc), and also decreased the number of α-epithelial sodium channel (α-ENaC) subunits in the apical membrane. To test the effects of MSC media, MSC-M and HCYT-MSC-M were added for an additional 12 h to AECs exposed to hypoxia plus cytomix. MSC-M and HCYT-MSC-M completely restored epithelial permeability to normal. MSC-M, but not HCYT-MSC-M, significantly prevented the hypoxia plus cytomix-induced decrease of ENaC activity and restored apical α-ENaC channels. Interestingly, KGF-deprived MSC-M were unable to restore amiloride-sensitive sodium transport, indicating a possible role for KGF in the beneficial effect of MSC-M. These results indicate that MSC-M may be a preferable therapeutic option for ALI.
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Affiliation(s)
- Arnaud Goolaerts
- Institut National de la Santé et de la Recherche Médicale, U773, Paris, France
| | - Nadia Pellan-Randrianarison
- Institut National de la Santé et de la Recherche Médicale, U773, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche 773 and Unité Mixte de Recherche 940, Paris, France
| | - Jérôme Larghero
- Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche 773 and Unité Mixte de Recherche 940, Paris, France; AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et CIC de Biothérapies, Paris, France; University Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Valérie Vanneaux
- Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche 773 and Unité Mixte de Recherche 940, Paris, France; AP-HP, Hôpital Saint Louis, Unité de Thérapie Cellulaire et CIC de Biothérapies, Paris, France; University Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, EA2363, Bobigny, France; AP-HP, Hôpital Avicenne, Bobigny, France; and
| | - Thomas Gille
- Université Paris 13, Sorbonne Paris Cité, EA2363, Bobigny, France; AP-HP, Hôpital Avicenne, Bobigny, France; and
| | - Nicolas Dard
- Université Paris 13, Sorbonne Paris Cité, EA2363, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, EA2363, Bobigny, France; AP-HP, Hôpital Avicenne, Bobigny, France; and
| | - Michael A Matthay
- Institut National de la Santé et de la Recherche Médicale, U773, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche 773 and Unité Mixte de Recherche 940, Paris, France
| | - Christine Clerici
- Institut National de la Santé et de la Recherche Médicale, U773, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche 773 and Unité Mixte de Recherche 940, Paris, France; AP-HP, Hôpital Bichat, Paris, France
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Frateschi S, Keppner A, Malsure S, Iwaszkiewicz J, Sergi C, Merillat AM, Fowler-Jaeger N, Randrianarison N, Planès C, Hummler E. Mutations of the serine protease CAP1/Prss8 lead to reduced embryonic viability, skin defects, and decreased ENaC activity. Am J Pathol 2012; 181:605-15. [PMID: 22705055 DOI: 10.1016/j.ajpath.2012.05.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 04/23/2012] [Accepted: 05/02/2012] [Indexed: 11/17/2022]
Abstract
CAP1/Prss8 is a membrane-bound serine protease involved in the regulation of several different effectors, such as the epithelial sodium channel ENaC, the protease-activated receptor PAR2, the tight junction proteins, and the profilaggrin polypeptide. Recently, the V170D and the G54-P57 deletion mutations within the CAP1/Prss8 gene, identified in mouse frizzy (fr) and rat hairless (fr(CR)) animals, respectively, have been proposed to be responsible for their skin phenotypes. In the present study, we analyzed those mutations, revealing a change in the protein structure, a modification of the glycosylation state, and an overall reduction in the activation of ENaC of the two mutant proteins. In vivo analyses demonstrated that both fr and fr(CR) mutant animals present analogous reduction of embryonic viability, similar histologic aberrations at the level of the skin, and a significant decrease in the activity of ENaC in the distal colon compared with their control littermates. Hairless rats additionally had dehydration defects in skin and intestine and significant reduction in the body weight. In conclusion, we provided molecular and functional evidence that CAP1/Prss8 mutations are accountable for the defects in fr and fr(CR) animals, and we furthermore demonstrate a decreased function of the CAP1/Prss8 mutant proteins. Therefore, fr and fr(CR) animals are suitable models to investigate the consequences of CAP1/Prss8 action on its target proteins in the whole organism.
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Affiliation(s)
- Simona Frateschi
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
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Uzunhan Y, Nunes H, Gille T, Bron C, Planès C, Valeyre D. Innovations thérapeutiques de la fibrose pulmonaire idiopathique. Presse Med 2011; 40:1100-12. [DOI: 10.1016/j.lpm.2011.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 07/19/2011] [Indexed: 02/06/2023] Open
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Martinod E, Uzunhan Y, Radu DM, Seguin A, Boddaert G, Valeyre D, Planès C, Carpentier A. [The lung]. Bull Acad Natl Med 2011; 195:1677-1685. [PMID: 22812170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Lung transplantation is still the only curative treatment for end-stage pulmonary diseases. The results remain poor, however, because of the limited availability of lung donors, chronic rejection, and complications related to immunosuppressive therapy. The use of a bioartificial lung generated from autologous cells could offer a solution. We have demonstrated that in vivo epithelial and cartilage regeneration of the airways is feasible with the use of an aortic tissue matrix. Other studies show that in vitro and in vivo airway regeneration, respectively, can be obtained by using bio-engineering and heterotopic allograft implantation. A more complex challenge is the creation of an artificial lung Indeed, this would require the use of an elastic matrix that can promote regeneration of the different lung components (airways, alveoli, vessels) over a large surface area, thus allowing ventilation, blood perfusion and gas exchanges. Recent studies have demonstrated the possibility of in vitro and in vivo regeneration of lung tissue from autologous cells, and especially stem cells. This emerging research field is currently dominated by the use of decellularized lung matrices and autologous epithelial and endothelial cells. Implantation of such a recellularized matrix in animals has proved the feasibility of a functional bio-artificial lung. The first human transplantation of a bio-artificial lung should be possible within 10-20 years.
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Affiliation(s)
- Emmanuel Martinod
- Chirurgie thoracique et vasculaire, Assistance Publique-Hôpitaux de Paris, CHU Paris - Seine Saint Denis, Hôpital Avicenne, Pôle Activités cancérologiques spécialisées, Faculté de Médecine SMBH, Bobigny, Université Paris 13.
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Prulière-Escabasse V, Clerici C, Vuagniaux G, Coste A, Escudier E, Planès C. Effect of neutrophil elastase and its inhibitor EPI-hNE4 on transepithelial sodium transport across normal and cystic fibrosis human nasal epithelial cells. Respir Res 2010; 11:141. [PMID: 20932306 PMCID: PMC2959028 DOI: 10.1186/1465-9921-11-141] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Accepted: 10/08/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hyperactivity of the epithelial sodium (Na+) channel (ENaC) and increased Na+ absorption by airway epithelial cells leading to airway surface liquid dehydration and impaired mucociliary clearance are thought to play an important role in the pathogenesis of cystic fibrosis (CF) pulmonary disease. In airway epithelial cells, ENaC is constitutively activated by endogenous trypsin-like serine proteases such as Channel-Activating Proteases (CAPs). It was recently reported that ENaC activity could also be stimulated by apical treatment with human neutrophil elastase (hNE) in a human airway epithelial cell line, suggesting that hNE inhibition could represent a novel therapeutic approach for CF lung disease. However, whether hNE can also activate Na+ reabsorption in primary human nasal epithelial cells (HNEC) from control or CF patients is currently unknown. METHODS We evaluated by short-circuit current (Isc) measurements the effects of hNE and EPI-hNE4, a specific hNE inhibitor, on ENaC activity in primary cultures of HNEC obtained from control (9) and CF (4) patients. RESULTS Neither hNE nor EPI-hNE4 treatments did modify Isc in control and CF HNEC. Incubation with aprotinin, a Kunitz-type serine protease inhibitor that blocks the activity of endogenous CAPs, decreased Isc by 27.6% and 54% in control and CF HNEC, respectively. In control and CF HNEC pretreated with aprotinin, hNE did significantly stimulate Isc, an effect which was blocked by EPI-hNE4. CONCLUSIONS These results indicate that hNE does activate ENaC and transepithelial Na+ transport in both normal and CF HNEC, on condition that the activity of endogenous CAPs is first inhibited. The potent inhibitory effect of EPI-hNE4 on hNE-mediated ENaC activation observed in our experiments highlights that the use of EPI-hNE4 could be of interest to reduce ENaC hyperactivity in CF airways.
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Planès C, Randrianarison NH, Charles RP, Frateschi S, Cluzeaud F, Vuagniaux G, Soler P, Clerici C, Rossier BC, Hummler E. ENaC-mediated alveolar fluid clearance and lung fluid balance depend on the channel-activating protease 1. EMBO Mol Med 2010; 2:26-37. [PMID: 20043279 PMCID: PMC3377187 DOI: 10.1002/emmm.200900050] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Sodium transport via epithelial sodium channels (ENaC) expressed in alveolar epithelial cells (AEC) provides the driving force for removal of fluid from the alveolar space. The membrane-bound channel-activating protease 1 (CAP1/Prss8) activates ENaC in vitro in various expression systems. To study the role of CAP1/Prss8 in alveolar sodium transport and lung fluid balance in vivo, we generated mice lacking CAP1/Prss8 in the alveolar epithelium using conditional Cre-loxP-mediated recombination. Deficiency of CAP1/Prss8 in AEC induced in vitro a 40% decrease in ENaC-mediated sodium currents. Sodium-driven alveolar fluid clearance (AFC) was reduced in CAP1/Prss8-deficient mice, due to a 48% decrease in amiloride-sensitive clearance, and was less sensitive to β2-agonist treatment. Intra-alveolar treatment with neutrophil elastase, a soluble serine protease activating ENaC at the cell surface, fully restored basal AFC and the stimulation by β2-agonists. Finally, acute volume-overload increased alveolar lining fluid volume in CAP1/Prss8-deficient mice. This study reveals that CAP1 plays a crucial role in the regulation of ENaC-mediated alveolar sodium and water transport and in mouse lung fluid balance.
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Affiliation(s)
- Carole Planès
- Département de Pharmacologie et de Toxicologie, Université de Lausanne, Lausanne, Switzerland
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Hummler E, Planès C. Importance of ENaC-mediated sodium transport in alveolar fluid clearance using genetically-engineered mice. Cell Physiol Biochem 2009; 25:63-70. [PMID: 20054145 DOI: 10.1159/000272051] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2009] [Indexed: 11/19/2022] Open
Abstract
The lung possesses specific transport systems that intra- and extracellularly maintain salt and fluid balance necessary for its function. At birth, the lungs rapidly transform into a fluid (Na(+))-absorbing organ to enable efficient gas exchange. Alveolar fluid clearance, which mainly depends on sodium transport in alveolar epithelial cells, is an important mechanism by which excess water in the alveoli is reabsorbed during the resolution of pulmonary edema. In this review, we will focus and summarize on the role of ENaC in alveolar lung liquid clearance and discuss recent data from mouse models with altered activity of epithelial sodium channel function in the lung, and more specifically in alveolar fluid clearance. Recent data studying mice with hyperactivity of ENaC or mice with reduced ENaC activity clearly illustrate the impaired lung fluid clearance in these adult mice. Further understanding of the physiological role of ENaC and its regulatory proteins implicated in salt and water balance in the alveolar cells may therefore help to develop new therapeutic strategies to improve gas exchange in pulmonary edema.
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Affiliation(s)
- Edith Hummler
- Département de Pharmacologie & Toxicologie, Université de Lausanne, Switzerland.
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Abstract
Lung alveolar epithelial cells are normally very well oxygenated but may be exposed to hypoxia in many pathological conditions such as pulmonary edema, acute respiratory distress syndrome, chronic obstructive pulmonary diseases, or in some environmental conditions such ascent to high altitude. The ability of alveolar epithelial cells to cope with low oxygen tensions is crucial to maintain the structural and functional integrity of the alveolar epithelium. Alveolar epithelial cells appear to be remarkably tolerant to oxygen deprivation as they are able to maintain adequate cellular ATP content during prolonged hypoxic exposure when mitochondrial oxidative phosphorylation is limited. This property mostly relies on the ability of the cells to rapidly modify their gene expression program, stimulating the expression of genes involved in anaerobic energy supply and repressing expression of genes involved in some ATP-consuming cellular processes. This adaptive strategy of the cells is mostly, but not entirely, dependent on the expression of hypoxia-inducible factors (HIFs), known to be responsible for orchestrating a large number of hypoxia-sensitive genes. This review focuses on the role of HIF isoforms expressed in alveolar epithelial cells exposed to hypoxia and on the specific hypoxic gene regulation that takes place in alveolar epithelial cells either through HIF-dependent or -independent pathways.
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Affiliation(s)
- Christine Clerici
- Service de Physiologie-Explorations Fonctionnelles, Paris cedex 18, France.
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Pruliere-Escabasse V, Vuagniaux G, Clerici C, Coste A, Planès C. Potential role of EPI-hNE4 treatment in CF patients. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60210-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Picard N, Eladari D, El Moghrabi S, Planès C, Bourgeois S, Houillier P, Wang Q, Burnier M, Deschenes G, Knepper MA, Meneton P, Chambrey R. Defective ENaC processing and function in tissue kallikrein-deficient mice. J Biol Chem 2007; 283:4602-11. [PMID: 18086683 DOI: 10.1074/jbc.m705664200] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
An inverse relationship exists between urinary tissue kallikrein (TK) excretion and blood pressure in humans and rodents. In the kidney TK is synthesized in large amounts in the connecting tubule and is mainly released into the urinary fluid where its function remains unknown. In the present study mice with no functional gene coding for TK (TK-/-) were used to test whether the enzyme regulates apically expressed sodium transporters. Semiquantitative immunoblotting of the renal cortex revealed an absence of the 70-kDa form of gamma-ENaC in TK-/- mice. Urinary Na+ excretion after amiloride injection was blunted in TK-/- mice, consistent with reduced renal ENaC activity. Amiloride-sensitive transepithelial potential difference in the colon, where TK is also expressed, was decreased in TK-/- mice, whereas amiloride-sensitive alveolar fluid clearance in the lung, where TK is not expressed, was unchanged. In mice lacking the B2 receptor for kinins, the abundance of the 70-kDa form of gamma-ENaC was increased, indicating that its absence in TK-/- mice is not kinin-mediated. Incubation of membrane proteins from renal cortex of TK-/- mice with TK resulted in the appearance of the 70-kDa band of the gamma-ENaC, indicating that TK was able to promote gamma-ENaC cleavage in vitro. Finally, in mouse cortical collecting ducts isolated and microperfused in vitro, the addition of TK in the luminal fluid increased significantly intracellular Na+ concentration, consistent with an activation of the luminal entry of the cation. The results demonstrate that TK, like several other proteases, can activate ENaC in the kidney and the colon.
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Affiliation(s)
- Nicolas Picard
- INSERM U872 (Centre de Recherche des Cordeliers), Université Paris 5, Faculté de Médecine René Descartes, and Département de Physiologie, Hôpital Necker-Enfants Malades, F-75015, Paris, France
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Randrianarison N, Clerici C, Ferreira C, Fontayne A, Pradervand S, Fowler-Jaeger N, Hummler E, Rossier BC, Planès C. Low expression of the beta-ENaC subunit impairs lung fluid clearance in the mouse. Am J Physiol Lung Cell Mol Physiol 2007; 294:L409-16. [PMID: 18024719 DOI: 10.1152/ajplung.00307.2007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Transepithelial alveolar sodium (Na+) transport mediated by the amiloride-sensitive epithelial sodium channel (ENaC) constitutes the driving force for removal of fluid from the alveolar space. To define the role of the beta-ENaC subunit in vivo in the mature lung, we studied a previously established mouse strain harboring a disruption of the beta-ENaC gene locus resulting in low levels of beta-ENaC mRNA expression. Real-time RT-PCR experiments confirmed that beta-ENaC mRNA levels were decreased by >90% in alveolar epithelial cells from homozygous mutant (m/m) mice. beta-ENaC protein was undetected in lung homogenates from m/m mice by Western blotting, but alpha- and gamma-ENaC proteins were increased by 83% and 45%, respectively, compared with wild-type (WT) mice. At baseline, Na+-driven alveolar fluid clearance (AFC) was significantly reduced by 32% in m/m mice. Amiloride at the concentration 1 mM inhibited AFC by 75% and 34% in WT and m/m mice, respectively, whereas a higher concentration (5 mM) induced a 75% inhibition of AFC in both groups. The beta2-agonist terbutaline significantly increased AFC in WT but not in m/m mice. These results show that despite the compensatory increase in alpha- and gamma-ENaC protein expression observed in mutant mouse lung, low expression of beta-ENaC results in a moderate impairment of baseline AFC and in decreased AFC sensitivity to amiloride, suggesting a possible change in the stoichiometry of ENaC channels. Finally, adequate beta-ENaC expression appears to be required for AFC stimulation by beta2-agonists.
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Affiliation(s)
- Nadia Randrianarison
- INSERM U773, CRB3, Université Denis Diderot-Paris 7, 16 rue Henri Huchard, 75018 Paris, France
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Prulière-Escabasse V, Planès C, Escudier E, Fanen P, Coste A, Clerici C. Modulation of epithelial sodium channel trafficking and function by sodium 4-phenylbutyrate in human nasal epithelial cells. J Biol Chem 2007; 282:34048-57. [PMID: 17890229 DOI: 10.1074/jbc.m702384200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Sodium 4-phenylbutyrate (4-PBA) has been shown to correct the cellular trafficking of several mutant or nonmutant plasma membrane proteins such as cystic fibrosis transmembrane conductance regulator through the expression of 70-kDa heat shock proteins. The objective of the study was to determine whether 4-PBA may influence the functional expression of epithelial sodium channels (ENaC) in human nasal epithelial cells (HNEC). Using primary cultures of HNEC, we demonstrate that 4-PBA (5 mm for 6 h) markedly stimulated amiloride-sensitive sodium channel activity and that this was related to an increased abundance of alpha-, beta-, and gamma-ENaC subunits in the apical membrane. The increase in ENaC cell surface expression (i) was due to insertion of newly ENaC subunits as determined by brefeldin A experiments and (ii) was not associated with cell surface retention of ENaC subunits because endocytosis of ENaC subunits was unchanged. In addition, we find that ENaC co-immunoprecipitated with the heat shock protein constitutively expressed Hsc70, that has been reported to modulate ENaC trafficking, and that 4-PBA decreased Hsc70 protein level. Finally, we report that in cystic fibrosis HNEC obtained from two cystic fibrosis patients, 4-PBA increased functional expression of ENaC as demonstrated by the increase in amiloride-sensitive sodium transport and in alpha-, beta-, and gamma-ENaC subunit expression in the apical membrane. Our results suggest that in HNEC, 4-PBA increases the functional expression of ENaC through the insertion of new alpha-, beta-, and gamma-ENaC subunits into the apical membrane and also suggest that 4-PBA could modify ENaC trafficking by reducing Hsc70 protein expression.
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Randrianarison N, Escoubet B, Ferreira C, Fontayne A, Fowler-Jaeger N, Clerici C, Hummler E, Rossier BC, Planès C. beta-Liddle mutation of the epithelial sodium channel increases alveolar fluid clearance and reduces the severity of hydrostatic pulmonary oedema in mice. J Physiol 2007; 582:777-88. [PMID: 17430990 PMCID: PMC2075313 DOI: 10.1113/jphysiol.2007.131078] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Transepithelial sodium transport via alveolar epithelial Na(+) channels and Na(+),K(+)-ATPase constitutes the driving force for removal of alveolar oedema fluid. Decreased activity of the amiloride-sensitive epithelial Na(+) channel (ENaC) in the apical membrane of alveolar epithelial cells impairs sodium-driven alveolar fluid clearance (AFC) and predisposes to pulmonary oedema. We hypothesized that hyperactivity of ENaC in the distal lung could improve AFC and facilitate the resolution of pulmonary oedema. AFC and lung fluid balance were studied at baseline and under conditions of hydrostatic pulmonary oedema in the beta-Liddle (L) mouse strain harbouring a gain-of-function mutation (R(566)(stop)) within the Scnn1b gene. As compared with wild-type (+/+), baseline AFC was increased by 2- and 3-fold in heterozygous (+/L) and homozygous mutated (L/L) mice, respectively, mainly due to increased amiloride-sensitive AFC. The beta(2)-agonist terbutaline stimulated AFC in +/+ and +/L mice, but not in L/L mice. Acute volume overload induced by saline infusion (40% of body weight over 2 h) significantly increased extravascular (i.e. interstitial and alveolar) lung water as assessed by the bloodless wet-to-dry lung weight ratio in +/+ and L/L mice, as compared with baseline. However, the increase was significantly larger in +/+ than in L/L groups (P=0.01). Volume overload also increased the volume of the alveolar epithelial lining fluid in +/+ mice, indicating the presence of alveolar oedema, but not in L/L mice. Cardiac function as evaluated by echocardiography was comparable in both groups. These data show that constitutive ENaC activation improved sodium-driven AFC in the mouse lung, and attenuated the severity of hydrostatic pulmonary oedema.
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Abstract
Recent investigations point to an important role for peptidases in regulating transcellular ion transport by the epithelial Na(+) channel, ENaC. Several peptidases, including furins and proteasomal hydrolases, modulate ENaC maturation and disposal. More idiosyncratically, apical Na(+) transport by ENaC in polarized epithelia of kidney, airway, and gut is stimulated constitutively by one or more trypsin-family serine peptidases, as revealed by inhibition of amiloride-sensitive Na(+) transport by broad-spectrum antipeptidases, including aprotinin and bikunin/SPINT2. In vitro, the transporting activity of aprotinin-suppressed ENaC can be restored by exposure to trypsin. The prototypical channel-activating peptidase (CAP) is a type 1 membrane-anchored tryptic peptidase first identified in Xenopus kidney cells. Frog CAP1 strongly upregulates Na(+) transport when coexpressed with ENaC in oocytes. The amphibian enzyme's apparent mammalian orthologue is prostasin, otherwise known as CAP1, which is coexpressed with ENaC in a variety of epithelia. In airway cells, prostasin is the major basal regulator of ENaC activity, as suggested by inhibition and knockdown experiments. Other candidate regulators of mature ENaC include CAP2/TMPRSS4 and CAP3/matriptase (also known as membrane-type serine protease 1/ST14). Mammalian CAPs are potential targets for treatment of ENaC-mediated Na(+) hyperabsorption by the airway in cystic fibrosis (CF) and by the kidney in hypertension. CAPs can be important for mammalian development, as indicated by embryonic lethality in mice with null mutations of CAP1/prostasin. Mice with selectively knocked out expression of CAP1/prostasin in the epidermis and mice with globally knocked out expression of CAP3/matriptase exhibit phenotypically similar defects in skin barrier function and neonatal death from dehydration. In rats, transgenic overexpression of human prostasin disturbs salt balance and causes hypertension. Thus, several converging lines of evidence indicate that ENaC function is regulated by peptidases, and that such regulation is critical for embryonic development and adult function of organs such as skin, kidney, and lung.
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Affiliation(s)
- Carole Planès
- INSERM U773, Centre de Recherche Biomédicale Bichat-Beaujon (CRB3), Université Paris 7, 75018 Paris, France
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Bouvry D, Planès C, Malbert-Colas L, Escabasse V, Clerici C. Hypoxia-Induced Cytoskeleton Disruption in Alveolar Epithelial Cells. Am J Respir Cell Mol Biol 2006; 35:519-27. [PMID: 16741163 DOI: 10.1165/rcmb.2005-0478oc] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Alveolar hypoxia, a common feature of many respiratory disorders, has been previously reported to induce functional changes, particularly a decrease of transepithelial Na and fluid transport. In polarized epithelia, cytoskeleton plays a regulatory role in transcellular and paracellular transport of ions and fluid. We hypothesized that exposure to hypoxia could damage cytoskeleton organization, which in turn, may adversely affect ion and fluid transport. Primary rat alveolar epithelial cells (AEC) were exposed to either mild (3% O(2)) or severe (0.5% O(2)) hypoxia for 18 h or to normoxia (21% O(2)). First, mild and severe hypoxia induced a disorganization of actin, a major protein of the cytoskeleton, reflected by disruption of F-actin filaments. Second, alpha-spectrin, an apical cytoskeleton protein, which binds to actin cytoskeleton and Na transport proteins, was cleaved by hypoxia. Pretreatment of AEC by a caspase inhibitor (z-VAD-fmk; 90 microM) blunted hypoxia-induced spectrin cleavage as well as hypoxia-induced decrease in surface membrane alpha-ENaC and concomitantly induced a partial recovery of hypoxia-induced decrease of amiloride-sensitive Na transport at 3% O(2). Finally, tight junctions (TJs) proteins, which are linked to actin and are a determinant of paracellular permeability, were altered by mild and severe hypoxia: hypoxia induced a mislocalization of occludin from the TJ to cytoplasm and a decrease in zonula occludens-1 protein level. These modifications were associated with modest changes in paracellular permeability at 0.5% O(2,) as assessed by small 4-kD dextran flux and transepithelial resistance measurements. Together, these findings indicate that hypoxia disrupted cytoskeleton and TJ organization in AEC and may participate, at least in part, to hypoxia-induced decrease in Na transport.
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Affiliation(s)
- Diane Bouvry
- INSERM U773 Centre de Recherche Biomédicale Bichat-Beaujon (CRB3), Université Paris 7 Denis Diderot, UFR de Médecine, Site Bichat, France
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Planès C, Leyvraz C, Uchida T, Angelova MA, Vuagniaux G, Hummler E, Matthay M, Clerici C, Rossier B. In vitro and in vivo regulation of transepithelial lung alveolar sodium transport by serine proteases. Am J Physiol Lung Cell Mol Physiol 2005; 288:L1099-109. [PMID: 15681398 DOI: 10.1152/ajplung.00332.2004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The amiloride-sensitive epithelial sodium channel (ENaC) constitutes a rate-limiting step for sodium (Na+) and water absorption across lung alveolar epithelium. Recent reports suggested that ENaC is regulated by membrane-bound extracellular serine proteases, such as channel-activating proteases (CAPs). The objectives of this study were to examine the role of serine proteases in the regulation of transepithelial alveolar Na+ and water transport in vitro and in vivo and the expression of CAPs in rodent distal lung. In vitro experiments showed that inhibition of endogenous serine proteases by apical aprotinin 1) decreased ENaC-mediated currents in primary cultures of rat and mouse alveolar epithelial cells without affecting the abundance nor the electrophoretic migration pattern of biotinylated alpha- and beta-ENaC expressed at the cell surface and 2) suppressed the increase in amiloride-sensitive short-circuit current induced by the beta2-agonist terbutaline. RT-PCR experiments indicated that CAP1, CAP2, and CAP3 mRNAs were expressed in mouse alveolar epithelial cells, whereas CAP1 was also expressed in alveolar macrophages recovered by bronchoalveolar lavage. CAP1 protein was detected by Western blotting in rat and mouse alveolar epithelial cells, alveolar macrophages and bronchoalveolar lavage fluid. Finally, in vivo experiments revealed that intra-alveolar treatment with aprotinin abolished the increase in Na+-driven alveolar fluid clearance (AFC) induced by terbutaline in an in situ mouse lung model, whereas trypsin potentiated it. These results show that endogenous membrane-bound and/or secreted serine proteases such as CAPs regulate alveolar Na+ and fluid transport in vitro and in vivo in rodent lung.
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Affiliation(s)
- Carole Planès
- Department of Physiology, INSERM U426, Faculté de Medécine Xavier Bichat, Université Paris 7, Paris, France.
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Portier F, Kania R, Planès C, Hsu WC, Couette S, Tran Ba Huy P, Herman P. Enhanced sodium absorption in middle ear epithelial cells cultured at air-liquid interface. Acta Otolaryngol 2005; 125:16-22. [PMID: 15799568 DOI: 10.1080/00016480410015749] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
CONCLUSION As we demonstrated previously that transcription of alpha-ENaC was correlated with oxygen tension in the culture medium, this study suggests that the increase in alpha-ENaC expression observed under ALI conditions may result from greater oxygenation of ME cells. OBJECTIVE The physiology of the middle ear (ME) is primarily concerned with keeping the cavities fluid-free, to allow transmission of sound vibrations from the eardrum to the inner ear. ME epithelial cells are thought to play a key role in this process as they actively absorb sodium and water in order to clear any excess fluid present in the cavities. MATERIAL AND METHODS As an air-liquid interface (ALI) model has been shown to improve differentiation and enhance sodium absorption in other respiratory epithelia, we established an ALI model for ME cells. RESULTS ME cells cultured under ALI conditions exhibited a fourfold increase in sodium absorption, which was not related to either a metabolic effect or to enhanced morphological differentiation, but instead to an increase in expression of the alpha-subunit of the epithelial sodium channel (alpha-ENaC).
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Affiliation(s)
- F Portier
- Laboratoire d'Otologie Expérimentale, UMR 7060, Faculté Lariboisière-St-Louis, Assistance Publique des Hôpitaux de Paris, Université Paris VII, Paris, France
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Planès C, D'Ortho MP, Foucher A, Berkani M, Leroux K, Essalhi M, Delclaux C, Quera-Salva MA, Lofaso F. Efficacy and cost of home-initiated auto-nCPAP versus conventional nCPAP. Sleep 2003; 26:156-60. [PMID: 12683473 DOI: 10.1093/sleep/26.2.156] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
STUDY OBJECTIVES To compare in a multicenter prospective study the efficacy and cost of conventional nasal continuous positive airway pressure (nCPAP) initiated at the sleep laboratory versus auto-nCPAP initiated at home. DESIGN Patients with severe obstructive sleep apnea syndrome (OSAS) were randomized to treatment with either the REM+ auto device in constant mode at the effective pressure determined by titration at the sleep laboratory (n=17) or the REM+ auto device in automatic mode initiated at the patients home by a nurse (n=18). After 2 months, the efficacy and cost of nCPAP therapy and the time from diagnosis to nCPAP were evaluated. All values are reported as means +/- SD. PATIENTS Thirty-five subjects with newly diagnosed OSAS (8 women and 27 men, mean age: 54.3 +/- 10.6 years, apnea-hypopnea index (AHI) 58.1 +/- 14.0 h(-1)). INTERVENTIONS N/A. MEASUREMENTS AND RESULTS Both treatments were used properly and induced similar decreases in the AHI (7.6 +/- 6.9 vs. 10.4 +/ -12.5 h(-1) for auto-nCPAP and conventional nCPAP, respectively; NS) and Epworth Sleepiness score (from 15.5 +/- 4.7 to 7.5 +/- 3.4 vs. 14.7 +/- 3.9 to 7.6 +/- 3.4 for auto-nCPAP and conventional nCPAP, respectively; NS). With auto-nCPAP initiated at home, the time from diagnosis to final adjustment of nCPAP was shorter (16.3 +/- 5.0 vs. 47.2 +/- 46.5 days with conventional nCPAP, P < 0.02) and the cost was lower (1,263 +/- 352 vs. 1720+/-455 E, respectively; P < 0.05). CONCLUSIONS Treatment of OSAS with auto-nCPAP initiated at home is effective and reliable and reduces the time from diagnosis to therapy and the cost of treatment.
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Affiliation(s)
- Carole Planès
- Service de Physiologie-Explorations Fonctionnelles, Hôpital Ambroise Paré, Assistance, Publique des Hôpitaux de Paris, Université Paris 5, 92100 Boulogne Billancourt, France.
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Planès C, Blot-Chabaud M, Matthay MA, Couette S, Uchida T, Clerici C. Hypoxia and beta 2-agonists regulate cell surface expression of the epithelial sodium channel in native alveolar epithelial cells. J Biol Chem 2002; 277:47318-24. [PMID: 12372821 DOI: 10.1074/jbc.m209158200] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Alveolar hypoxia may impair sodium-dependent alveolar fluid transport and induce pulmonary edema in rat and human lung, an effect that can be prevented by the inhalation of beta(2)-agonists. To investigate the mechanism of beta(2)-agonist-mediated stimulation of sodium transport under conditions of moderate hypoxia, we examined the effect of terbutaline on epithelial sodium channel (ENaC) expression and activity in cultured rat alveolar epithelial type II cells exposed to 3% O(2) for 24 h. Hypoxia reduced transepithelial sodium current and amiloride-sensitive sodium channel activity without decreasing ENaC subunit mRNA or protein levels. The functional decrease was associated with reduced abundance of ENaC subunits (especially beta and gamma) in the apical membrane of hypoxic cells, as quantified by biotinylation. cAMP stimulation with terbutaline reversed the hypoxia-induced decrease in transepithelial sodium transport by stimulating sodium channel activity and markedly increased the abundance of beta-and gamma-ENaC in the plasma membrane of hypoxic cells. The effect of terbutaline was prevented by brefeldin A, a blocker of anterograde transport. These novel results establish that hypoxia-induced inhibition of amiloride-sensitive sodium channel activity is mediated by decreased apical expression of ENaC subunits and that beta(2)-agonists reverse this effect by enhancing the insertion of ENaC subunits into the membrane of hypoxic alveolar epithelial cells.
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Affiliation(s)
- Carole Planès
- Department of Physiology, INSERM U426, Université Paris 7, 75018 Paris, France
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