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Lhuillier M, Aoust L, Dreano E, Franco-Montoya ML, Landry-Truchon K, Houde N, Chhun S, Hinzpeter A, Edelman A, Delacourt C, Jeannotte L, Sermet-Gaudelus I, Hadchouel A. Elexacaftor/Tezacaftor/Ivacaftor Disrupts Respiratory Tract Development in a Murine Fetal Lung Explant Model. Am J Respir Cell Mol Biol 2022; 67:723-726. [PMID: 36454086 PMCID: PMC9743190 DOI: 10.1165/rcmb.2022-0175le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Affiliation(s)
| | - Laura Aoust
- Institut Necker Enfants MaladesParis, France,Assistance Publique-Hôpitaux de Paris (AP-HP)-CentreParis, France
| | | | | | - Kim Landry-Truchon
- Centre de Recherche du CHU de Québec-Université Laval (Oncology Axis)Québec, Canada
| | - Nicolas Houde
- Centre de Recherche du CHU de Québec-Université Laval (Oncology Axis)Québec, Canada
| | | | | | | | - Christophe Delacourt
- Institut Necker Enfants MaladesParis, France,Université de Paris CitéParis, France,Centre de Référence pour les Maladies Respiratoires Rares de l'EnfantParis, France
| | - Lucie Jeannotte
- Centre de Recherche du CHU de Québec-Université Laval (Oncology Axis)Québec, Canada,Université LavalQuébec, Canada
| | - Isabelle Sermet-Gaudelus
- Institut Necker Enfants MaladesParis, France,Assistance Publique-Hôpitaux de Paris (AP-HP)-CentreParis, France,Université de Paris CitéParis, France,Centre de Référence pour les Maladies Respiratoires Rares de l'EnfantParis, France,European Respiratory Network for Lung DiseaseFrankfurt, Germany,Corresponding author (e-mail: )
| | - Alice Hadchouel
- Institut Necker Enfants MaladesParis, France,Université de Paris CitéParis, France,Centre de Référence pour les Maladies Respiratoires Rares de l'EnfantParis, France
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Zysman M, Baptista BR, Essari LA, Taghizadeh S, Thibault de Ménonville C, Giffard C, Issa A, Franco-Montoya ML, Breau M, Souktani R, Aissat A, Caeymaex L, Lizé M, Van Nhieu JT, Jung C, Rottier R, Cruzeiro MD, Adnot S, Epaud R, Chabot F, Lanone S, Boczkowski J, Boyer L. Targeting p16 INK4a Promotes Lipofibroblasts and Alveolar Regeneration after Early-Life Injury. Am J Respir Crit Care Med 2020; 202:1088-1104. [PMID: 32628504 DOI: 10.1164/rccm.201908-1573oc] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Rationale: Promoting endogenous pulmonary regeneration is crucial after damage to restore normal lungs and prevent the onset of chronic adult lung diseases.Objectives: To investigate whether the cell-cycle inhibitor p16INK4a limits lung regeneration after newborn bronchopulmonary dysplasia (BPD), a condition characterized by the arrest of alveolar development, leading to adult sequelae.Methods: We exposed p16INK4a-/- and p16INK4a ATTAC (apoptosis through targeted activation of caspase 8) transgenic mice to postnatal hyperoxia, followed by pneumonectomy of the p16INK4a-/- mice. We measured p16INK4a in blood mononuclear cells of preterm newborns, 7- to 15-year-old survivors of BPD, and the lungs of patients with BPD.Measurements and Main Results: p16INK4a concentrations increased in lung fibroblasts after hyperoxia-induced BPD in mice and persisted into adulthood. p16INK4a deficiency did not protect against hyperoxic lesions in newborn pups but promoted restoration of the lung architecture by adulthood. Curative clearance of p16INK4a-positive cells once hyperoxic lung lesions were established restored normal lungs by adulthood. p16INK4a deficiency increased neutral lipid synthesis and promoted lipofibroblast and alveolar type 2 (AT2) cell development within the stem-cell niche. Besides, lipofibroblasts support self-renewal of AT2 cells into alveolospheres. Induction with a PPARγ (peroxisome proliferator-activated receptor γ) agonist after hyperoxia also increased lipofibroblast and AT2 cell numbers and restored alveolar architecture in hyperoxia-exposed mice. After pneumonectomy, p16INK4a deficiency again led to an increase in lipofibroblast and AT2 cell numbers in the contralateral lung. Finally, we observed p16INK4a mRNA overexpression in the blood and lungs of preterm newborns, which persisted in the blood of older survivors of BPD.Conclusions: These data demonstrate the potential of targeting p16INK4a and promoting lipofibroblast development to stimulate alveolar regeneration from childhood to adulthood.
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Affiliation(s)
- Maéva Zysman
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | - Bruno Ribeiro Baptista
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Pneumologie, Centre Hospitalier Universitaire, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Laure-Aléa Essari
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Pneumologie, Centre Hospitalier Universitaire, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Sara Taghizadeh
- Department of Pulmonary and Critical Care Medicine, Key Laboratory of Interventional Pulmonology of Zheijiang Province, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | | | | | - Amelle Issa
- Centre de Recherche Clinique, Centre de Ressource Biologique, Centre Hospitalier Intercommunal, Creteil, France
| | | | | | | | - Abdel Aissat
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | - Laurence Caeymaex
- Soins Intensifs Néonataux, Centre Hospitalier Intercommunal, Creteil, France
| | - Muriel Lizé
- Molecular and Experimental Pneumology Group, Clinic for Cardiology and Pneumology, University Medical Center Goettingen, Goettingen, Germany
| | - Jeanne Tran Van Nhieu
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Pathologie, Hôpital Henri Mondor, AP-HP, Hôpital Henri Mondor, Creteil, France
| | - Camille Jung
- Centre de Recherche Clinique, Centre de Ressource Biologique, Centre Hospitalier Intercommunal, Creteil, France
| | - Robert Rottier
- Department of Pediatric Surgery, Erasmus Medical Center-Sophia Children's Hospital, Rotterdam, the Netherlands.,Department of Cell Biology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Marcio Do Cruzeiro
- INSERM U1016, Institut Cochin, Paris, France.,UMR 8104, Centre National de la Recherche Scientifique, Paris, France.,Université Paris Descartes, Sorbonne, Paris, France
| | - Serge Adnot
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Physiologie, Hôpital Henri Mondor, AP-HP, Creteil, France; and
| | - Ralph Epaud
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Pédiatrie, Centre des Maladies Respiratoire Rares, Centre Hospitalier Intercommunal, Creteil, France
| | - François Chabot
- Service de Pneumologie, Centre Hospitalier Universitaire, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Sophie Lanone
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | | | - Laurent Boyer
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,Service de Physiologie, Hôpital Henri Mondor, AP-HP, Creteil, France; and
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3
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Hadchouel A, Franco-Montoya ML, Guerin S, Do Cruzeiro M, Lhuillier M, Ribeiro Baptista B, Boyer L, Lanone S, Delacourt C. Overexpression of Spock2 in mice leads to altered lung alveolar development and worsens lesions induced by hyperoxia. Am J Physiol Lung Cell Mol Physiol 2020; 319:L71-L81. [PMID: 32374670 DOI: 10.1152/ajplung.00191.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/31/2022] Open
Abstract
SPARC/osteonectin, cwcv and kazal-like domains proteoglycan 2 (SPOCK2) was previously associated with genetic susceptibility to bronchopulmonary dysplasia in a French population of very preterm neonates. Its expression increases during lung development and is increased after exposure of rat pups to hyperoxia compared with controls bred in room air. To further investigate the role of SPOCK2 during lung development, we designed two mouse models, one that uses a specific anti-Spock2 antibody and one that reproduces the hyperoxia-induced Spock2 expression with a transgenic mouse model resulting in a conditional and lung-targeted overexpression of Spock2. When mice were bred under hyperoxic conditions, treatment with anti-Spock2 antibodies significantly improved alveolarization. Lung overexpression of Spock2 altered alveolar development in pups bred in room air and worsened hyperoxia-induced lesions. Neither treatment with anti-Spock2 antibody nor overexpression of Spock2 was associated with abnormal activation of matrix metalloproteinase-2. These two models did not alter the expression of known players in alveolar development. This study brings strong arguments for the deleterious role of SPOCK2 on lung alveolar development especially after lung injury, suggesting its role in bronchopulmonary dysplasia susceptibility. These effects are not mediated by a deregulation in metalloproteases activity and in expression of factors essential to normal alveolarization. The balance between types 1 and 2 epithelial alveolar cells may be involved.
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Affiliation(s)
- Alice Hadchouel
- Service de Pneumologie et d'Allergologie Pédiatriques, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France.,Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France.,Université de Paris, Paris, France
| | - Marie-Laure Franco-Montoya
- Service de Pneumologie et d'Allergologie Pédiatriques, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France
| | - Sophie Guerin
- Service de Pneumologie et d'Allergologie Pédiatriques, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France.,Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France
| | - Marcio Do Cruzeiro
- Homologous Recombination, Cochin Institute, Université de Paris, Paris, France
| | - Mickaël Lhuillier
- U1151, Institut National de la Santé et de la Recherche Médicale, Institut Necker-Enfants Malades, Université de Paris, Paris, France
| | - Bruno Ribeiro Baptista
- Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France
| | - Laurent Boyer
- Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France
| | - Sophie Lanone
- Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France
| | - Christophe Delacourt
- Service de Pneumologie et d'Allergologie Pédiatriques, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France.,Equipe 4, U955, Institut National de la Santé et de la Recherche Médicale, Créteil, France.,Université de Paris, Paris, France
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4
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Audureau É, Simon-Deckers A, Franco-Montoya ML, Annangi B, Kermanizadeh A, Boczkowski J, Lanone S. Substantial modification of the gene expression profile following exposure of macrophages to welding-related nanoparticles. Sci Rep 2018; 8:8554. [PMID: 29867105 PMCID: PMC5986907 DOI: 10.1038/s41598-018-26988-z] [Citation(s) in RCA: 4] [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: 08/24/2017] [Accepted: 05/21/2018] [Indexed: 11/09/2022] Open
Abstract
Anthropic nanoparticles (NP) are increasingly produced and emitted, with accompanying concerns for human health. Currently there is no global understanding as to the exact mechanistics of NP toxicity, as the traditional nanotoxicological approaches only provide a restricted overview. To address this issue, we performed an in-depth transcriptomic analysis of human macrophages exposed to a panel of welding-related metal oxide NP that we previously identified in welders lungs (Fe2O3, Fe3O4, MnFe2O4 and CrOOH NP). Utilizing the specified analysis criteria (|fold change| ≥1.5, p ≤ 0.001), a total of 2164 genes were identified to be differentially expressed after THP-1 macrophage exposure to the different NP. Performing Gene Ontology enrichment analysis, for cellular content, biological processes and Swiss-Prot/Protein Information Resource keywords the data show for the first time a profound modification of gene differential expression in response to the different NP, among which MnFe2O4 NP were the most potent to induce THP-1 macrophage activation. The transcriptomic analysis utilized in the study, provides novel insights into mechanisms that could contribute to NP-induced adverse effects and support the need for widened approaches to supplement existing knowledge of the processes underlying NP toxicity which would have not been possible using traditional nanotoxicological studies.
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Affiliation(s)
- Étienne Audureau
- Université Paris Est-Créteil, DHU A-TVB, IRMB- EA 7376 CEpiA (Clinical Epidemiology And Ageing Unit), Créteil, F-94010, France.,AP-HP, Hôpital Henri-Mondor, Service de Santé Publique, Créteil, F-94010, France
| | | | | | | | - Ali Kermanizadeh
- INSERM, U955, Equipe 4, Créteil, F-94000, France.,University of Copenhagen, Department of Public Health, Copenhagen, Denmark
| | - Jorge Boczkowski
- INSERM, U955, Equipe 4, Créteil, F-94000, France.,Université Paris Est-Créteil, Faculté de Médecine, Créteil, F-94000, France.,DHU A-TVB, Service d'explorations fonctionnelles respiratoires, Assistance Publique Hôpitaux de Paris, Hôpitaux Universitaires Henri Mondor, Créteil, F-94000, France
| | - Sophie Lanone
- INSERM, U955, Equipe 4, Créteil, F-94000, France. .,Université Paris Est-Créteil, Faculté de Médecine, Créteil, F-94000, France.
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5
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Paul E, Franco-Montoya ML, Paineau E, Angeletti B, Vibhushan S, Ridoux A, Tiendrebeogo A, Salome M, Hesse B, Vantelon D, Rose J, Canouï-Poitrine F, Boczkowski J, Lanone S, Delacourt C, Pairon JC. Pulmonary exposure to metallic nanomaterials during pregnancy irreversibly impairs lung development of the offspring. Nanotoxicology 2017; 11:484-495. [DOI: 10.1080/17435390.2017.1311381] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Emmanuel Paul
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Marie-Laure Franco-Montoya
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Erwan Paineau
- Laboratoire de Physique des Solides, CNRS, University of Paris-Sud, Université Paris-Saclay, Orsay, France
| | - Bernard Angeletti
- CEREGE, Aix Marseille Université-CNRS-IRD-Collège de France, Aix-en-Provence, France
| | - Shamila Vibhushan
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Audrey Ridoux
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Arnaud Tiendrebeogo
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | | | - Bernhard Hesse
- European Synchrotron Radiation Facility, Grenoble, France
| | | | - Jérôme Rose
- CEREGE, Aix Marseille Université-CNRS-IRD-Collège de France, Aix-en-Provence, France
| | - Florence Canouï-Poitrine
- DHU A-TVB, IMRB, EA 7376 CEpiA (Clinical Epidemiology And Ageing Unit), Université Paris-Est Créteil (UPEC), Créteil, France
- Public Health Department, AP-HP, Henri-Mondor Teaching Hospital, Créteil, France
| | - Jorge Boczkowski
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Sophie Lanone
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Christophe Delacourt
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
| | - Jean-Claude Pairon
- Inserm U955, Equipe 04, Créteil, France
- Faculté de Médecine, DHU A-TVB, IMRB, Université Paris Est Créteil, Créteil, France
- Centre Hospitalier Intercommunal, Institut Santé-Travail Paris-Est, Créteil, France
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6
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Drummond D, Baravalle-Einaudi M, Lezmi G, Vibhushan S, Franco-Montoya ML, Hadchouel A, Boczkowski J, Delacourt C. Combined Effects of in Utero and Adolescent Tobacco Smoke Exposure on Lung Function in C57Bl/6J Mice. Environ Health Perspect 2017; 125:392-399. [PMID: 27814244 PMCID: PMC5332197 DOI: 10.1289/ehp54] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 10/10/2016] [Accepted: 10/13/2016] [Indexed: 05/30/2023]
Abstract
BACKGROUND Fetal determinants of airway function, such as in utero exposure to maternal cigarette smoke (CS), may create a predisposition to adult airflow obstruction and chronic obstructive pulmonary disease (COPD) in adulthood. It has been suggested that active smoking in adolescence and preexisting airflow obstruction have synergistic deleterious effects. OBJECTIVE We used a mouse model to investigate whether there is a synergistic effect of exposure to CS in utero and during adolescence on lung function. METHODS Female C57Bl/6J mice were exposed to CS or to filtered room air during pregnancy. Exposure to CS began 2 weeks before mating and continued until delivery. After birth, the pups were not exposed to CS until day 21 (D21). Between D21 and D49, corresponding to "adolescence," litters were randomized for an additional 4 weeks of exposure to CS. Lung morphometry, lung mechanics, and the expression of genes involved in senescence were evaluated in different subsets of mice on D21 and D49. RESULTS In utero exposure to CS induced significant lung function impairment by D21. CS exposure between D21 and D49 induced significant functional impairment only in mice exposed to CS prenatally. On D49, no difference was observed between subgroups in terms of lung p53, p16, p21, and Bax mRNA levels. CONCLUSIONS Our findings suggest that prenatal and adolescent CS exposure have a synergistic effect on lung function in mice. The combined effect did not appear to be a consequence of early pulmonary senescence. Citation: Drummond D, Baravalle-Einaudi M, Lezmi G, Vibhushan S, Franco-Montoya ML, Hadchouel A, Boczkowski J, Delacourt C. 2017. Combined effects of in utero and adolescent tobacco smoke exposure on lung function in C57Bl/6J mice. Environ Health Perspect 125:392-399; http://dx.doi.org/10.1289/EHP54.
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Affiliation(s)
- David Drummond
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Mélissa Baravalle-Einaudi
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Guillaume Lezmi
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Shamila Vibhushan
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Marie-Laure Franco-Montoya
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Alice Hadchouel
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
- Pneumologie Pédiatrique, Necker, AP-HP (Assistance Publique-Hôpitaux de Paris), France; Centre de Référence des Maladies Respiratoires Rares, Paris, France
- Université Paris-Descartes, Paris, France
| | - Jorge Boczkowski
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
| | - Christophe Delacourt
- INSERM (Institut National de la Santé et de la Recherche Médicale), U955, Equipe 04, IMRB (Institut Mondor de Recherche Biomédicale), Créteil, France
- Pneumologie Pédiatrique, Necker, AP-HP (Assistance Publique-Hôpitaux de Paris), France; Centre de Référence des Maladies Respiratoires Rares, Paris, France
- Université Paris-Descartes, Paris, France
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7
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Hadchouel A, Marchand-Martin L, Franco-Montoya ML, Peaudecerf L, Ancel PY, Delacourt C. Salivary Telomere Length and Lung Function in Adolescents Born Very Preterm: A Prospective Multicenter Study. PLoS One 2015; 10:e0136123. [PMID: 26355460 PMCID: PMC4565668 DOI: 10.1371/journal.pone.0136123] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 07/29/2015] [Indexed: 11/18/2022] Open
Abstract
Preterm birth is associated with abnormal respiratory functions throughout life. The mechanisms underlying these long-term consequences are still unclear. Shortening of telomeres was associated with many conditions, such as chronic obstructive pulmonary disease. We aimed to search for an association between telomere length and lung function in adolescents born preterm. Lung function and telomere length were measured in 236 adolescents born preterm and 38 born full-term from the longitudinal EPIPAGE cohort. Associations between telomere length and spirometric indices were tested in univariate and multivariate models accounting for confounding factors in the study population. Airflows were significantly lower in adolescents born preterm than controls; forced expiratory volume in one second was 12% lower in the extremely preterm born group than controls (p<0.001). Lower birth weight, bronchopulmonary dysplasia and postnatal sepsis were significantly associated with lower airflow values. Gender was the only factor that was significantly associated with telomere length. Telomere length correlated with forced expiratory flow 25–75 in the extremely preterm adolescent group in univariate and multivariate analyses (p = 0.01 and p = 0.02, respectively). We evidenced an association between telomere length and abnormal airflow in a population of adolescents born extremely preterm. There was no evident association with perinatal events. This suggests other involved factors, such as a continuing airway oxidative stress leading to persistent inflammation and altered lung function, ultimately increasing susceptibility to chronic obstructive pulmonary disease.
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Affiliation(s)
- Alice Hadchouel
- AP-HP, Hôpital Universitaire Necker-Enfants Malades, Pneumologie et Allergologie Pédiatriques, Paris, 75015, France
- INSERM, U955, équipe 4, Créteil, 94000, France
- Université Paris Descartes-Sorbonne Paris Cité, Paris, 75006, France
- * E-mail:
| | | | | | | | - Pierre-Yves Ancel
- Université Paris Descartes-Sorbonne Paris Cité, Paris, 75006, France
- INSERM, UMR 1153, Paris, 75004, France
| | - Christophe Delacourt
- AP-HP, Hôpital Universitaire Necker-Enfants Malades, Pneumologie et Allergologie Pédiatriques, Paris, 75015, France
- INSERM, U955, équipe 4, Créteil, 94000, France
- Université Paris Descartes-Sorbonne Paris Cité, Paris, 75006, France
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8
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Zana-Taieb E, Pham H, Franco-Montoya ML, Jacques S, Letourneur F, Baud O, Jarreau PH, Vaiman D. Impaired alveolarization and intra-uterine growth restriction in rats: a postnatal genome-wide analysis. J Pathol 2015; 235:420-30. [DOI: 10.1002/path.4470] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 09/17/2014] [Accepted: 10/13/2014] [Indexed: 02/06/2023]
Affiliation(s)
- E Zana-Taieb
- Université Paris Descartes; Paris France
- Fondation PremUp, 53 avenue de l'Observatoire, 75014 Paris; France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1141; Paris France
- Assistance Publique - Hôpitaux de Paris, Service de Médecine et Réanimation Néonatales de Port-Royal, Groupe Hospitalier Cochin, Broca, Hôtel-Dieu, 53 Avenue de l'Observatoire, 75014 Paris; France
| | - H Pham
- Fondation PremUp, 53 avenue de l'Observatoire, 75014 Paris; France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1141; Paris France
| | - ML Franco-Montoya
- Institut National de la Santé et de la Recherche Médicale (INSERM) U955 IMRB Equipe 04, Faculté de Médecine de Créteil, 94010 Créteil; France
| | - S Jacques
- Genom'ic, INSERM U1016, CNRS UMR8104, Paris; France
| | - F Letourneur
- Genom'ic, INSERM U1016, CNRS UMR8104, Paris; France
| | - O Baud
- Fondation PremUp, 53 avenue de l'Observatoire, 75014 Paris; France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1141; Paris France
- Assistance Publique - Hôpitaux de Paris, Service de Réanimation et Pédiatrie Néonatales, Hôpital Robert Debré, Paris; France
- Université Paris Diderot; Paris France
| | - PH Jarreau
- Université Paris Descartes; Paris France
- Fondation PremUp, 53 avenue de l'Observatoire, 75014 Paris; France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1141; Paris France
- Assistance Publique - Hôpitaux de Paris, Service de Médecine et Réanimation Néonatales de Port-Royal, Groupe Hospitalier Cochin, Broca, Hôtel-Dieu, 53 Avenue de l'Observatoire, 75014 Paris; France
| | - D Vaiman
- Institut Cochin, INSERM U1016-CNRS, UMRS 104; Paris France
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9
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Hadchouel A, Franco-Montoya ML, Delacourt C. Altered lung development in bronchopulmonary dysplasia. ACTA ACUST UNITED AC 2014; 100:158-67. [PMID: 24638954 DOI: 10.1002/bdra.23237] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [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: 11/09/2013] [Revised: 02/09/2014] [Accepted: 02/11/2014] [Indexed: 11/11/2022]
Abstract
Bronchopulmonary dysplasia (BPD) is the main respiratory sequela of extreme prematurity. Its pathophysiology is complex, involving interactions between host and environment, likely to be significantly influenced by genetic factors. Thus, the clinical presentation and histological lesions have evolved over time, along with the reduction in neonatal injuries, and the care of more immature children. Impaired alveolar growth, however, is a lesion consistently observed in BPD, such that it is a key feature in BPD, and is even the dominant characteristic of the so-called "new" forms of BPD. This review describes the key molecular pathways that are believed to be involved in the genesis of BPD. Much of our understanding is based on animal models, but this is increasingly being enriched by genetic approaches, and long-term respiratory functional studies.
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Affiliation(s)
- Alice Hadchouel
- INSERM, U955, IMRB, Equipe 04, Créteil, France; AP-HP, Hôpital Necker-Enfants Malades, service de Pneumologie Pédiatrique, Centre de Référence pour les Maladies Respiratoires Rares de l'Enfant, Paris, France; Université Paris-Descartes, Paris, France
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10
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Zana-Taieb E, Butruille L, Franco-Montoya ML, Lopez E, Vernier F, Grandvuillemin I, Evain-Brion D, Deruelle P, Baud O, Delacourt C, Jarreau PH. Effect of two models of intrauterine growth restriction on alveolarization in rat lungs: morphometric and gene expression analysis. PLoS One 2013; 8:e78326. [PMID: 24278109 PMCID: PMC3836790 DOI: 10.1371/journal.pone.0078326] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 09/11/2013] [Indexed: 01/21/2023] Open
Abstract
Intrauterine growth restriction (IUGR) in preterm infants increases the risk of bronchopulmonary dysplasia, characterized by arrested alveolarization. We evaluated the impact of two different rat models (nitric oxide synthase inhibition or protein deprivation) of IUGR on alveolarization, before, during, and at the end of this postnatal process. We studied IUGR rat pups of dams fed either a low protein (LPD) or a normal diet throughout gestation and pups of dams treated by continuous infusion of Nω-nitro-L-arginine methyl ester (L-NAME) or its diluent on the last four days of gestation. Morphometric parameters, alveolar surface (Svap), mean linear intercept (MLI) and radial alveolar count (RAC) and transcriptomic analysis were determined with special focus on genes involved in alveolarization. IUGR pups regained normal weight at day 21 in the two treated groups. In the LPD group, Svap, MLI and RAC were not different from those of controls at day 4, but were significantly decreased at day 21, indicating alveolarization arrest. In the L-NAME group, Svap and RAC were significantly decreased and MLI was increased at day 4 with complete correction at day 21. In the L-NAME model, several factors involved in alveolarization, VEGF, VEGF-R1 and –R2, MMP14, MMP16, FGFR3 and 4, FGF18 and 7, were significantly decreased at day 4 and/or day 10, while the various factors studied were not modified in the LPD group. These results demonstrate that only maternal protein deprivation leads to sustained impairment of alveolarization in rat pups, whereas L-NAME impairs lung development before alveolarization. Known growth factors involved in lung development do not seem to be involved in LPD-induced alveolarization disorders, raising the question of a possible programming of altered alveolarization.
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Affiliation(s)
- Elodie Zana-Taieb
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U767, Paris, France
- PremUp, Paris, France
- Service de Médecine et Réanimation néonatales de Port-Royal, Groupe hospitalier Cochin, Broca, Hôtel-Dieu, Assistance Publique – Hôpitaux de Paris, Paris, France
- Université Paris Descartes, Paris, France
- * E-mail:
| | - Laura Butruille
- Unité environnement périnatal et croissance, EA4489, Faculté de Médecine, Pôle recherche, IFR 114,Université Lille Nord de France, Lille, France
| | | | - Emmanuel Lopez
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U767, Paris, France
- PremUp, Paris, France
- Service de Médecine et Réanimation néonatales de Port-Royal, Groupe hospitalier Cochin, Broca, Hôtel-Dieu, Assistance Publique – Hôpitaux de Paris, Paris, France
| | - Flore Vernier
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U767, Paris, France
- PremUp, Paris, France
| | - Isabelle Grandvuillemin
- Institut National de la Santé Et de la Recherche Médicale (INSERM) UMR 1076, Faculté de Pharmacie, Université de la Méditerranée. Marseille, France
| | - Danièle Evain-Brion
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U767, Paris, France
- PremUp, Paris, France
- Université Paris Descartes, Paris, France
| | - Philippe Deruelle
- Unité environnement périnatal et croissance, EA4489, Faculté de Médecine, Pôle recherche, IFR 114,Université Lille Nord de France, Lille, France
| | - Olivier Baud
- PremUp, Paris, France
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U676, Paris, France
- Service de Réanimation et Pédiatrie néonatales, Hôpital Robert Debré, Assistance Publique – Hôpitaux de Paris, Paris, France
- Université Paris Diderot, Paris, France
| | - Christophe Delacourt
- PremUp, Paris, France
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U955 IMRB Equipe 04, Créteil, France
- Service de Pneumologie Pédiatrique, Hôpital Necker-Enfants Malades, Assistance Publique – Hôpitaux de Paris, Paris, France
- Université Paris Descartes, Paris, France
| | - Pierre-Henri Jarreau
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U767, Paris, France
- PremUp, Paris, France
- Service de Médecine et Réanimation néonatales de Port-Royal, Groupe hospitalier Cochin, Broca, Hôtel-Dieu, Assistance Publique – Hôpitaux de Paris, Paris, France
- Université Paris Descartes, Paris, France
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Joram N, Launay E, Roze JC, Caillon J, Franco-Montoya ML, Bourbon J, Jarreau PH, Gras-Le Guen C. Betamethasone worsens chorioamnionitis-related lung development impairment in rabbits. Am J Perinatol 2011; 28:605-12. [PMID: 21494996 DOI: 10.1055/s-0031-1276734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Although chorioamnionitis and glucocorticoids (GC) are both known to have potential adverse effects on alveolar development, the use of GC is generalized because of their demonstrated benefits in premature newborns. The objective of this study was to analyze the cumulative effects of GC and chorioamnionitis on lung development and infectious process. In a model of ESCHERICHIA COLI chorioamnionitis controlled by antibiotics, pregnant rabbits were randomized among five groups: (1) E. COLI infection alone, (2) infection plus one betamethasone injection (0.1 mg.kg(-1)), (3) infection plus two betamethasone injections, (4) betamethasone alone, (5) control. Lung morphometric analysis, bronchoalveolar lavage, and bacteriologic tissue cultures were performed after spontaneous delivery. In the context of chorioamnionitis, one betamethasone treatment significantly decreased birth weight and lung volume versus controls (30 ± 1.40 versus 52.40 ± 2.54 g, and 1.92 ± 0.67 versus 2.15 ± 0.74 cm(3), respectively, p < 0.05). Two betamethasone treatments significantly decreased specific alveolar area (279.8 ± 46 cm(2)/100 g versus 510.90 ± 54.1 cm(2)/100 g), specific interstitium volume (0.98 ± 0.09 cm(3)/100 g versus 1.78 ± 0.16 cm(3)/100 g), and specific elastin fiber length (57.4 ± 10.5 versus 183.6 ± 8.1 cm/100 g). These results suggest that glucocorticoid treatment might represent an additional risk factor for lung development in the instance of prenatal infection.
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Affiliation(s)
- Nicolas Joram
- CIC mère-enfant, Children's Hospital, CHU Nantes, Creteil, France.
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Franco-Montoya ML, Boucherat O, Thibault C, Chailley-Heu B, Incitti R, Delacourt C, Bourbon JR. Profiling target genes of FGF18 in the postnatal mouse lung: possible relevance for alveolar development. Physiol Genomics 2011; 43:1226-40. [PMID: 21878612 DOI: 10.1152/physiolgenomics.00034.2011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Better understanding alveolarization mechanisms could help improve prevention and treatment of diseases characterized by reduced alveolar number. Although signaling through fibroblast growth factor (FGF) receptors is essential for alveolarization, involved ligands are unidentified. FGF18, the expression of which peaks coincidentally with alveolar septation, is likely to be involved. Herein, a mouse model with inducible, lung-targeted FGF18 transgene was used to advance the onset of FGF18 expression peak, and genome-wide expression changes were determined by comparison with littermate controls. Quantitative RT-PCR was used to confirm expression changes of selected up- and downregulated genes and to determine their expression profiles in the course of lung postnatal development. This allowed identifying so-far unknown target genes of the factor, among which a number are known to be involved in alveolarization. The major target was adrenomedullin, a promoter of lung angiogenesis and alveolar development, whose transcript was increased 6.9-fold. Other genes involved in angiogenesis presented marked expression increases, including Wnt2 and cullin2. Although it appeared to favor cell migration notably through enhanced expression of Snai1/2, FGF18 also induced various changes consistent with prevention of epithelial-mesenchymal transition. Together with antifibrotic effects driven by induction of E prostanoid receptor 2 and repression of numerous myofibroblast markers, this could prevent alveolar septation-driving mechanisms from becoming excessive and deleterious. Last, FGF18 up- or downregulated genes of extracellular matrix components and epithelial cell markers previously shown to be up- or downregulated during alveolarization. These findings therefore argue for an involvement of FGF18 in the control of various developmental events during the alveolar stage.
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Hadchouel A, Durrmeyer X, Bouzigon E, Incitti R, Huusko J, Jarreau PH, Lenclen R, Demenais F, Franco-Montoya ML, Layouni I, Patkai J, Bourbon J, Hallman M, Danan C, Delacourt C. Identification of SPOCK2 as a susceptibility gene for bronchopulmonary dysplasia. Am J Respir Crit Care Med 2011; 184:1164-70. [PMID: 21836138 DOI: 10.1164/rccm.201103-0548oc] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
RATIONALE Bronchopulmonary dysplasia is the most common chronic respiratory disease in premature infants. Genetic factors might contribute to bronchopulmonary dysplasia susceptibility. OBJECTIVES To identify genetic variants involved in bronchopulmonary dysplasia through a genome-wide association study. METHODS We prospectively evaluated 418 premature neonates (gestational age <28 wk), of whom 22% developed bronchopulmonary dysplasia. Two discovery series were created, using a DNA pooling strategy in neonates from white and African ancestry. Polymorphisms associated with the disease were confirmed in an independent replication population. Genes were then explored by fine mapping and associations were replicated in an external Finnish population of 213 neonates. Validated genes expression patterns were studied in rat lung, after air or hyperoxia exposure. MEASUREMENTS AND MAIN RESULTS SPOCK2 gene was identified by both discovery series. The most significant polymorphism (rs1245560; P = 1.66 × 10(-7)) was confirmed by individual genotyping, and in the replication population (P = 0.002). Fine mapping confirmed the association of rs1245560 with bronchopulmonary dysplasia in both white and African populations with adjusted odds ratios of 2.96 (95% confidence interval [CI], 1.37-6.40) and 4.87 (95% CI, 1.88-12.63), respectively. In white neonates, rs1049269 was also associated with the disease (odds ratio, 3.21; 95% CI, 1.51-6.82). These associations were replicated in the Finnish population. In newborn rat lungs, SPOCK2 mRNA levels markedly increased during the alveolar stage of lung development. After rat exposure to hyperoxia, SPOCK2 expression increased relative to air-exposed controls. CONCLUSIONS We identified SPOCK2 as a new possible candidate susceptibility gene for bronchopulmonary dysplasia. Its lung expression pattern points toward a potential role in alveolarization.
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Lopez E, Jarreau PH, Zana E, Franco-Montoya ML, Schmitz T, Evain-Brion D, Bourbon J, Delacourt C, Méhats C. Differential expression of cyclic nucleotide phosphodiesterases 4 in developing rat lung. Dev Dyn 2011; 239:2470-8. [PMID: 20652950 DOI: 10.1002/dvdy.22374] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
During the perinatal period, lungs undergo changes to adapt to air breathing. The genes involved in these changes are developmentally regulated by various signaling pathways, including the cyclic nucleotide cAMP. As PDE4s are critical enzymes for regulation of cAMP levels, the objective of this study was to investigate PDE4's ontogeny in developing rat lung during the perinatal period. Pulmonary PDE4 activity, PDE4A-D, PDE4B, and PDE4D variant expression levels, PDE4B and PDE4D protein levels, and PDE4D localization in distal lung were determined. PDE4 activity increased towards term, dropped at birth, and increased thereafter to reach a plateau at the end of the second week of life. PDE4B2 and PDE4D long forms demonstrated a pattern of expression that increased markedly at birth. After birth, PDE4D was expressed in alveolar epithelial and mesenchymal cells. The study, therefore, evidenced striking variations in expression patterns among the PDE4 family that differed from changes in global PDE4 activity.
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15
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Boucherat O, Franco-Montoya ML, Delacourt C, Martinovic J, Masse V, Elie C, Thébaud B, Benachi A, Bourbon JR. Defective angiogenesis in hypoplastic human fetal lungs correlates with nitric oxide synthase deficiency that occurs despite enhanced angiopoietin-2 and VEGF. Am J Physiol Lung Cell Mol Physiol 2010; 298:L849-56. [PMID: 20348277 DOI: 10.1152/ajplung.00333.2009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Lung hypoplasia (LH) is a life-threatening congenital abnormality with various causes. It involves vascular bed underdevelopment with abnormal arterial muscularization leading to pulmonary hypertension. Because underlying molecular changes are imperfectly known and sometimes controversial, we determined key factors of angiogenesis along intrauterine development, focusing at the angiopoietin (ANG)/Tie-2 system. Lung specimens from medical terminations of pregnancy (9-37 wk) were used, including LH due to congenital diaphragmatic hernia (CDH) or other causes, and nonpulmonary disease samples were used as controls. ELISA determination indicated little ANG-1 change during pregnancy and no effect of LH, whereas Tie-2 declined similarly between 9 and 37 wk in LH and controls. By contrast, ANG-2 markedly increased in LH from 24 wk, whereas it remained stable in controls. Because VEGF increased also, this was interpreted as an attempt to overcome vascular underdevelopment. Hypothesizing that its inefficiency might be due to impaired downstream mechanism, endothelial nitric oxide synthase (eNOS) was determined by semiquantitative Western blot and found to be reduced by approximately 75%, mostly in the instance of CDH. In conclusion, angiogenesis remains defective in hypoplastic lungs despite reactive enhancement of VEGF and ANG-2 production, which could be due, at least in part, to insufficient eNOS expression.
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Affiliation(s)
- Olivier Boucherat
- Institut Mondor de Recherche Biomédicale, Institut National de Santé et de Recherche Médicale Unité 955, Créteil, France
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Franco-Montoya ML, Bourbon JR, Durrmeyer X, Lorotte S, Jarreau PH, Delacourt C. Pulmonary effects of keratinocyte growth factor in newborn rats exposed to hyperoxia. Am J Physiol Lung Cell Mol Physiol 2009; 297:L965-76. [PMID: 19700645 DOI: 10.1152/ajplung.00136.2009] [Citation(s) in RCA: 39] [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] [Indexed: 11/22/2022] Open
Abstract
Acute lung injury and compromised alveolar development characterize bronchopulmonary dysplasia (BPD) of the premature neonate. High levels of keratinocyte growth factor (KGF), a cell-cell mediator with pleiotrophic lung effects, are associated with low BPD risk. KGF decreases mortality in hyperoxia-exposed newborn rodents, a classic model of injury-induced impaired alveolarization, although the pulmonary mechanisms of this protection are poorly defined. These were explored through in vitro and in vivo approaches in the rat. Hyperoxia decreased by 30% the rate of wound closure of a monolayer of fetal alveolar epithelial cells, due to cell death, which was overcome by recombinant human KGF (100 ng/ml). In rat pups exposed to >95% O2 from birth, increased viability induced by intraperitoneal injection of KGF (2 microg/g body wt) every other day was associated with prevention of neutrophil influx in bronchoalveolar lavage (BAL), prevention of decreases in whole lung DNA content and cell proliferation rate, partial prevention of apoptosis increase, and a markedly increased proportion of surfactant protein B-immunoreactive cells in lung parenchyma. Increased lung antioxidant capacity is likely to be due in part to enhanced CAAT/enhancer binding protein alpha expression. By contrast, KGF neither corrected changes induced by hyperoxia in parameters of lung morphometry that clearly indicated impaired alveolarization nor had any significant effect on tissue or BAL surfactant phospholipids. These findings evidence KGF alveolar epithelial cell protection, enhancing effects on alveolar repair capacity, and anti-inflammatory effects in the injured neonatal lung that may account, at least in part, for its ability to reduce mortality. They argue in favor of a therapeutic potential of KGF in the injured neonatal lung.
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Affiliation(s)
- Marie-Laure Franco-Montoya
- Institut National de la Santé et de la Recherche Médicale, Unité 955, Faculté de Médecine, Université Paris-Val-de-Marne, Centre Hospitalier Intercommunal, Créteil, France
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17
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Hadchouel A, Decobert F, Franco-Montoya ML, Halphen I, Jarreau PH, Boucherat O, Martin E, Benachi A, Amselem S, Bourbon J, Danan C, Delacourt C. Matrix metalloproteinase gene polymorphisms and bronchopulmonary dysplasia: identification of MMP16 as a new player in lung development. PLoS One 2008; 3:e3188. [PMID: 18784838 PMCID: PMC2527515 DOI: 10.1371/journal.pone.0003188] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Accepted: 08/21/2008] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Alveolarization requires coordinated extracellular matrix remodeling, a process in which matrix metalloproteinases (MMPs) play an important role. We postulated that polymorphisms in MMP genes might affect MMP function in preterm lungs and thus influence the risk of bronchopulmonary dysplasia (BPD). METHODS AND FINDINGS Two hundred and eighty-four consecutive neonates with a gestational age of <28 weeks were included in this prospective study. Forty-five neonates developed BPD. Nine single-nucleotide polymorphisms (SNPs) were sought in the MMP2, MMP14 and MMP16 genes. After adjustment for birth weight and ethnic origin, the TT genotype of MMP16 C/T (rs2664352) and the GG genotype of MMP16 A/G (rs2664349) were found to protect from BPD. These genotypes were also associated with a smaller active fraction of MMP2 and with a 3-fold-lower MMP16 protein level in tracheal aspirates collected within 3 days after birth. Further evaluation of MMP16 expression during the course of normal human and rat lung development showed relatively low expression during the canalicular and saccular stages and a clear increase in both mRNA and protein levels during the alveolar stage. In two newborn rat models of arrested alveolarization the lung MMP16 mRNA level was less than 50% of normal. CONCLUSIONS MMP16 may be involved in the development of lung alveoli. MMP16 polymorphisms appear to influence not only the pulmonary expression and function of MMP16 but also the risk of BPD in premature infants.
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Affiliation(s)
- Alice Hadchouel
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
| | - Fabrice Decobert
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
- Réanimation Néonatale, Centre Hospitalier Intercommunal, Créteil, France
| | | | - Isabelle Halphen
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
| | - Pierre-Henri Jarreau
- PremUp, Paris, France
- Service de médecine néonatale de Port-Royal, AP-HP, Hôpital Cochin, Paris, France
- Université Paris Descartes, Faculté de Médecine, Paris, France
| | - Olivier Boucherat
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
| | | | - Alexandra Benachi
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
- Service d'Obstétrique et Gynécologie, AP-HP, Hôpital Necker, Paris, France
| | | | - Jacques Bourbon
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
| | - Claude Danan
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
- Réanimation Néonatale, Centre Hospitalier Intercommunal, Créteil, France
- Unité Fonctionnelle de Recherche Clinique, Centre Hospitalier Intercommunal, Créteil, France
| | - Christophe Delacourt
- INSERM, Unité 841, IMRB, équipe 06, Créteil, France
- PremUp, Paris, France
- Université Paris 12, Faculté de Médecine, IFR10, Créteil, France
- * E-mail:
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Boucherat O, Franco-Montoya ML, Thibault C, Incitti R, Chailley-Heu B, Delacourt C, Bourbon JR. Gene expression profiling in lung fibroblasts reveals new players in alveolarization. Physiol Genomics 2007; 32:128-41. [PMID: 17911382 DOI: 10.1152/physiolgenomics.00108.2007] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [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: 01/08/2023] Open
Abstract
Little is known about the molecular basis of lung alveolarization. We used a microarray profiling strategy to identify novel genes that may regulate the secondary septation process. Rat lung fibroblasts were extemporaneously isolated on postnatal days 2, 7, and 21, i.e., before, during, and after septation, respectively. Total RNA was extracted, and cRNAs were hybridized to Affymetrix rat genome 230 2.0 microarrays. Expression levels of a selection of genes were confirmed by real-time PCR. In addition to genes already known to be upregulated during alveolarization including drebrin, midkine, Fgfr3, and Fgfr4, the study allowed us to identify two remarkable groups of genes with opposite profiles, i.e., gathering genes either transiently up- or downregulated on day 7. The former group includes the transcription factors retinoic acid receptor (RXR)-gamma and homeobox (Hox) a2, a4, and a5 and genes involved in Wnt signaling (Wnt5a, Fzd1, and Ndp); the latter group includes the extracellular matrix components Comp and Opn and the signal molecule Slfn4. Profiling in whole lung from fetal life to adulthood confirmed that changes were specific for alveolarization. Two treatments that arrest septation, hyperoxia and dexamethasone, inhibited the expression of genes that are upregulated during alveolarization and conversely enhanced that of genes weakly expressed during alveolarization and upregulated thereafter. The possible roles of these genes in secondary septation are discussed. Gene expression profiling analysis on freshly isolated cells represents a powerful approach to provide new information about differential regulation of genes during alveolarization and pathways potentially involved in the pathogenesis of bronchopulmonary dysplasia.
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Affiliation(s)
- Olivier Boucherat
- Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 841, Institut Mondor de Recherche Biomédicale (IMRB), Département de Biologie et Thérapeutiques Cardiorespiratoires et Hépatiques, Créteil, France
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Boucherat O, Benachi A, Chailley-Heu B, Franco-Montoya ML, Elie C, Martinovic J, Bourbon JR. Surfactant maturation is not delayed in human fetuses with diaphragmatic hernia. PLoS Med 2007; 4:e237. [PMID: 17676984 PMCID: PMC1950205 DOI: 10.1371/journal.pmed.0040237] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Accepted: 06/07/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Pulmonary hypoplasia and persistent pulmonary hypertension account for significant mortality and morbidity in neonates with congenital diaphragmatic hernia (CDH). Global lung immaturity and studies in animal models suggest the presence of surfactant deficiency that may further complicate the pathophysiology of CDH. However, data about surfactant status in human fetuses with CDH at birth are contradictory. The lack of a chronological study of surfactant content in late pregnancy has been a significant limitation. The appropriateness of administering surfactant supplements to neonates with CDH is therefore a debated question. METHODS AND FINDINGS We investigated surfactant content in human fetuses with CDH compared to age-matched fetuses with nonpulmonary diseases used as controls. Concentrations of disaturated phosphatidylcholine and surfactant proteins were found to be similar at a given stage of pregnancy, with both components showing a similar pattern of increase with progressing pregnancy in fetuses with CDH and in control fetuses. Thyroid transcription factor 1, a critical regulator of surfactant protein transcription, similarly displayed no difference in abundance. Finally, we examined the expression of three glucocorticoid-regulated diffusible mediators involved in lung epithelial maturation, namely: keratinocyte growth factor (KGF), leptin, and neuregulin 1 beta 1 (NRG1-beta1). KGF expression decreased slightly with time in control fetuses, but remained unchanged in fetuses with CDH. Leptin and NRG1-beta1 similarly increased in late pregnancy in control and CDH lungs. These maturation factors were also determined in the sheep fetus with surgical diaphragmatic hernia, in which surfactant deficiency has been reported previously. In contrast to the findings in humans, surgical diaphragmatic hernia in the sheep fetus was associated with decreased KGF and neuregulin expression. Fetoscopic endoluminal tracheal occlusion performed in the sheep model to correct lung hypoplasia increased leptin expression, partially restored KGF expression, and fully restored neuregulin expression. CONCLUSIONS Our results indicate that CDH does not impair surfactant storage in human fetuses. CDH lungs exhibited no trend toward a decrease in contents, or a delay in developmental changes for any of the studied surfactant components and surfactant maturation factors. Surfactant amounts are likely to be appropriate to lung size. These findings therefore do not support the use of surfactant therapy for infants with CDH. Moreover, they raise the question of the relevance of CDH animal models to explore lung biochemical maturity.
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Affiliation(s)
- Olivier Boucherat
- Institut national de la santé et de la recherche médicale (INSERM), Unité 841—Institut Mondor de Recherche Biomédicale, Créteil, France
- Université Paris 12, Faculté de Médecine, Créteil, France
| | - Alexandra Benachi
- Institut national de la santé et de la recherche médicale (INSERM), Unité 841—Institut Mondor de Recherche Biomédicale, Créteil, France
- Université Paris 12, Faculté de Médecine, Créteil, France
- Université Paris-Descartes, Paris, France
- Maternité, Assistance Publique-Hôpitaux de Paris et Hôpital Necker-Enfants Malades, Paris, France
| | - Bernadette Chailley-Heu
- Institut national de la santé et de la recherche médicale (INSERM), Unité 841—Institut Mondor de Recherche Biomédicale, Créteil, France
- Université Paris 12, Faculté de Médecine, Créteil, France
| | - Marie-Laure Franco-Montoya
- Institut national de la santé et de la recherche médicale (INSERM), Unité 841—Institut Mondor de Recherche Biomédicale, Créteil, France
- Université Paris 12, Faculté de Médecine, Créteil, France
| | - Caroline Elie
- Maternité, Assistance Publique-Hôpitaux de Paris et Hôpital Necker-Enfants Malades, Paris, France
- Service de Biostatistique et Informatique Médicale, Assistance Publique-Hôpitaux de Paris et Hôpital Necker-Enfants Malades, Paris, France
| | - Jelena Martinovic
- Maternité, Assistance Publique-Hôpitaux de Paris et Hôpital Necker-Enfants Malades, Paris, France
- Service de Fœtopathologie, Assistance Publique-Hôpitaux de Paris et Hôpital Necker-Enfants Malades, Paris, France
| | - Jacques R Bourbon
- Institut national de la santé et de la recherche médicale (INSERM), Unité 841—Institut Mondor de Recherche Biomédicale, Créteil, France
- Université Paris 12, Faculté de Médecine, Créteil, France
- * To whom correspondence should be addressed. E-mail:
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Boucherat O, Benachi A, Barlier-Mur AM, Franco-Montoya ML, Martinovic J, Thébaud B, Chailley-Heu B, Bourbon JR. Decreased lung fibroblast growth factor 18 and elastin in human congenital diaphragmatic hernia and animal models. Am J Respir Crit Care Med 2007; 175:1066-77. [PMID: 17303798 DOI: 10.1164/rccm.200601-050oc] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [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: 11/16/2022] Open
Abstract
RATIONALE Lung hypoplasia in congenital diaphragmatic hernia (CDH) seems to involve impaired alveolar septation. We hypothesized that disturbed deposition of elastin and expression of fibroblast growth factor 18 (FGF18), an elastogenesis stimulus, occurs in CDH. OBJECTIVES To document FGF18 and elastin in human CDH and ovine surgical and rat nitrofen models and to use models to evaluate the benefit of treatments. METHODS Human CDH and control lungs were collected post mortem. Diaphragmatic hernia was created in sheep at 85 days; fetal lungs were collected at 139 days (term = 145 days). Pregnant rats received nitrofen at 12 days; fetal lungs were collected at 21 days (term = 22 days). Some of the sheep fetuses with hernia underwent tracheal occlusion (TO); some of the nitrofen-treated pregnant rats received vitamin A. Both treatments are known to promote lung growth. MEASUREMENTS AND MAIN RESULTS Coincidental with the onset of secondary septation, FGF18 protein increased threefold in control human lungs, which failed to occur in CDH. FGF18 labeling was found in interstitial cells of septa. Elastin staining demonstrated poor septation and markedly decreased elastin density in CDH lungs. Consistently, lung FGF18 transcripts were diminished 60 and 83% by CDH in sheep and rats, respectively, and elastin density and expression were diminished. TO and vitamin A restored FGF18 and elastin expression in sheep and rats, respectively. TO restored elastin density. CONCLUSIONS Impaired septation in CDH is associated with decreased FGF18 expression and elastic fiber deposition. Simultaneous correction of FGF18 and elastin defects by TO and vitamin A suggests that defective elastogenesis may result, at least partly, from FGF18 deficiency.
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Lopez E, Boucherat O, Franco-Montoya ML, Bourbon JR, Delacourt C, Jarreau PH. Nitric oxide donor restores lung growth factor and receptor expression in hyperoxia-exposed rat pups. Am J Respir Cell Mol Biol 2006; 34:738-45. [PMID: 16484688 DOI: 10.1165/rcmb.2005-0254oc] [Citation(s) in RCA: 27] [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: 01/05/2023] Open
Abstract
Exposure of newborn rats to hyperoxia impairs alveolarization. Nitric oxide (NO) may prevent this evolution. Angiogenesis and factors involved in this process, but also other growth factors (GFs) involved in alveolar development, are likely potential therapeutic targets for NO. We studied the effects of the NO donor, [Z]-1-[N-(2-aminoethyl)-N-(2-ammonioethyl)aminio]diazen-1-ium-1, 2-diolate, also termed DETANONOate (D-NO), on hyperoxia-induced changes in key regulatory factors of alveolar development in neonatal rats, and its possible preventive effect on the physiologic consequences of hyperoxia. Newborn rat pups were randomized at birth to hyperoxia (> 95% O2) or room air exposure for 6 or 10 d, while receiving D-NO or its diluent. On Day 6, several GFs and their receptors were studied at pre- and/or post-translational levels. Elastin transcript determination on Day 6, and elastin deposition in tissue and morphometric analysis of the lungs on Day 10, were also performed. Hyperoxia decreased the expression of vascular endothelial growth factor (VEGF) receptor (VEGFR) 2, fibroblast growth factor (FGF)-18, and FGF receptors (FGFRs) FGFR3 and FGFR4, increased mortality, and impaired alveolarization and capillary growth. D-NO treatment of hyperoxia-exposed pups restored the expression level of FGF18 and FGFR4, induced an increase of both VEGF mRNA and protein, enhanced elastin expression, and partially restored elastin deposition in alveolar walls. Although, under the present conditions, D-NO failed to prevent the physiologic consequences of hyperoxia in terms of survival and lung alveolarization, our findings demonstrate molecular effects of NO on GFs involved in alveolar development that may have contributed to the protective effects previously reported for NO.
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Affiliation(s)
- Emmanuel Lopez
- Institut National de la Santé et de la Recherche Médicale, Université Paris, Faculté de Médecine, Créteil, France
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22
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Waszak P, Franco-Montoya ML, Jacob MP, Deprez I, Levame M, Lafuma C, Harf A, Delacourt C. Effect of intratracheal adenoviral vector administration on lung development in newborn rats. Hum Gene Ther 2002; 13:1873-85. [PMID: 12396619 DOI: 10.1089/104303402760372963] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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
Local overexpression of genes that promote lung defense or repair may be helpful in protecting the immature neonatal lung from injuries, but whether the vectors used to administer these genes affect physiological postnatal lung growth has not been investigated. We explored the effect on alveolarization of E1-deleted Adnull vector (Ad5-LMP-null) given intratracheally to 3-day-old rats. Three Adnull doses were evaluated 10(8), 5 x 10(8), and 10(9) TCID(50). Lung morphometry on day 21 showed significant growth disorders with the two higher doses. With 5 x 10(8) TCID(50), absolute lung volume increased significantly (+16%), as did absolute (+20%) and specific (+32%) alveolar airspace volumes, whereas alveolar surface density decreased by 13% (p < 0.009 for all parameters). Lung inflammation was mild, nonsignificant, and occurred mainly with the highest Adnull dose, indicating that it was unlikely to contribute to our results. Adnull instillation induced a significant#10; decrease in terminal bronchiolar cell proliferation as evaluated by proliferating cell nuclear antigen immunostaining (p = 0.02), as well as a 23% decrease in absolute parenchyma elastic fiber length (p = 0.02). Furthermore, lung tropoelastin mRNA content decreased by 25% (p < 0.02). In conclusion, E1-deleted adenoviral vectors can induce lung growth disorders when instilled into the airways of neonatal rats. Interactions with lung matrix turnover may be the main explanation to these deleterious effects.
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Affiliation(s)
- Paul Waszak
- INSERM U492, Faculté de Médecine, 94010 Créteil, France
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Lemjabbar H, Gosset P, Lechapt-Zalcman E, Franco-Montoya ML, Wallaert B, Harf A, Lafuma C. Overexpression of alveolar macrophage gelatinase B (MMP-9) in patients with idiopathic pulmonary fibrosis: effects of steroid and immunosuppressive treatment. Am J Respir Cell Mol Biol 1999; 20:903-13. [PMID: 10226060 DOI: 10.1165/ajrcmb.20.5.3260] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.9] [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 macrophages (AM) express gelatinase B, a member of the matrix metalloproteinase family involved in the degradation and remodeling of extracellular matrix components. We evaluated the expression of gelatinase B in the course of idiopathic pulmonary fibrosis (IPF) by studying alveolar macrophages in culture AM and bronchoalveolar lavage fluid from 12 untreated patients with IPF, 11 patients with IPF under treatment with steroid and immunosuppressive agents, and 10 control subjects. By using zymography and quantitative image analysis, latent gelatinase B, as well an 88-kD active form, were investigated in culture medium (24 h) of AMs and were found to be significantly increased (P < 0.01) in untreated patients exhibiting severe IPF when compared with control subjects (4.1 +/- 1.7 versus 0.3 +/- 0.2 10(5) arbitrary units [AU]/10(4) AM for the 92-kD form). Concomitant studies of gelatinase B levels associated with cultured AM extracts or freshly harvested AM showed similar results, both at the mRNA and protein levels, respectively. Immunocytochemical studies on freshly harvested AM demonstrated that the enzyme was located mainly at the cell, suggesting some involvement of gelatinase B in AM migration. In contrast, gelatinase B activity secreted by AM tended to be normal in patients with IPF under steroid and immunosuppressive treatment. Simultaneously, level of the gelatinase B activity in epithelial lining fluid was increased in untreated IPF patients, whereas it was normal in treated patients. These results suggest that AM of patients with IPF are primed for gelatinase B expression and that steroid and immunosuppressive treatment induces negative modulation of the gelatinase B overexpression. We conclude that gelatinase B may play a role in lung remodeling in IPF.
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Affiliation(s)
- H Lemjabbar
- INSERM U296 de Physiologie Respiratoire, Faculté de Médecine, Créteil; INSERM U416 de Pathologie Immuno-Allergologique Respiratoire, Institut Pasteur, France
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d'Ortho MP, Clerici C, Yao PM, Delacourt C, Delclaux C, Franco-Montoya ML, Harf A, Lafuma C. Alveolar epithelial cells in vitro produce gelatinases and tissue inhibitor of matrix metalloproteinase-2. Am J Physiol 1997; 273:L663-75. [PMID: 9316503 DOI: 10.1152/ajplung.1997.273.3.l663] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Type II pneumocytes are key cells of the alveolar epithelium. They lie on the alveolar basement membrane, which influences their phenotype and functions. We hypothesized that type II pneumocytes degrade basement membrane components by producing gelatinases, members of the matrix metalloproteinase family. To investigate this hypothesis, we used primary cultures of rat type II pneumocytes and cultures of the human A549 cell line. We found by zymography that 70-kDa gelatinase was present in media conditioned by these cells. This 70-kDa gelatinase was identified as gelatinase A by a Western blot, and the presence of its mRNA was demonstrated by reverse transcription-polymerase chain reaction. A 95-kDa gelatinase could be induced under certain conditions. Production of gelatinases may take place during the turnover of basement membranes, in physiological and in pathophysiological processes. This was suggested by the increase in production of both gelatinases that we observed after in vitro exposure to LPS or interleukin-1. The presence of tissue inhibitors of matrix metalloproteinase-1 and -2 was also demonstrated, suggesting that degradation of extracellular matrix by type II pneumocytes is tightly regulated.
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Affiliation(s)
- M P d'Ortho
- Unité U296 de l'Institut National de la Santé et de la Recherche Médicale, Faculté de Médecine, Créteil, France
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Lorino AM, Benichou M, Macquin-Mavier I, Franco-Montoya ML, Lorino H, Harf A. Influence of lung volume on histamine-induced bronchoconstriction in guinea-pigs. Eur Respir J 1991. [DOI: 10.1183/09031936.93.04101191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The influence of lung volume on bronchopulmonary reactivity was investigated in 4 groups of 14 anaesthetized paralysed mechanically ventilated guinea-pigs: animals of group 1 served as control; in animals of group 2, the parasympathetic nervous system was blockaded with atropine; animals of group 3 were submitted to a bilateral cervical vagotomy; animals of group 4 were both vagotomized and pretreated with atropine. In each group, the animals were randomly divided into 2 subgroups: one was ventilated at zero end-expiratory pressure (ZEEP), the other with 0.2 kPa positive end-expiratory pressure (PEEP) resulting in a mean increase in lung volume of about 1 ml. Bronchopulmonary response to infused histamine was assessed by the respiratory conductance and compliance values measured during bronchoconstriction (respectively HGrs and HCrs). In the control group, animals exposed to PEEP were found significantly less reactive than those ventilated at ZEEP. In groups 2, 3 and 4, this difference was significantly reduced for HGrs and even abolished for HCrs. These results demonstrate that the effect of lung volume on moderate histamine-induced bronchoconstriction in guinea-pigs is not purely mechanical, but is partly vagally mediated. They also suggest that this vagally mediated inhibitory influence results from involvement of central reflexes evoked by stretch receptor stimulation.
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Lorino AM, Benichou M, Macquin-Mavier I, Franco-Montoya ML, Lorino H, Harf A. Influence of lung volume on histamine-induced bronchoconstriction in guinea-pigs. Eur Respir J 1991; 4:1191-6. [PMID: 1804666] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The influence of lung volume on bronchopulmonary reactivity was investigated in 4 groups of 14 anaesthetized paralysed mechanically ventilated guinea-pigs: animals of group 1 served as control; in animals of group 2, the parasympathetic nervous system was blockaded with atropine; animals of group 3 were submitted to a bilateral cervical vagotomy; animals of group 4 were both vagotomized and pretreated with atropine. In each group, the animals were randomly divided into 2 subgroups: one was ventilated at zero end-expiratory pressure (ZEEP), the other with 0.2 kPa positive end-expiratory pressure (PEEP) resulting in a mean increase in lung volume of about 1 ml. Bronchopulmonary response to infused histamine was assessed by the respiratory conductance and compliance values measured during bronchoconstriction (respectively HGrs and HCrs). In the control group, animals exposed to PEEP were found significantly less reactive than those ventilated at ZEEP. In groups 2, 3 and 4, this difference was significantly reduced for HGrs and even abolished for HCrs. These results demonstrate that the effect of lung volume on moderate histamine-induced bronchoconstriction in guinea-pigs is not purely mechanical, but is partly vagally mediated. They also suggest that this vagally mediated inhibitory influence results from involvement of central reflexes evoked by stretch receptor stimulation.
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Affiliation(s)
- A M Lorino
- INSERM U296, Département de Physiologie, Hôpital Henri Mondor, Créteil, France
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Macquin-Mavier I, Franco-Montoya ML, Rosso J, Jarreau PH, Meignan M, Harf A. Effects of platelet-activating factor on lung epithelial permeability in the guinea-pig. Pulm Pharmacol 1991; 4:233-8. [PMID: 1806136 DOI: 10.1016/0952-0600(91)90016-v] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We examined the effects of platelet-activating factor (PAF) on lung epithelial permeability by measuring the clearance of intratracheally administered 99m-technetium-labeled diethylene triamine penta-acetic acid (99mTc-DTPA) in guinea-pigs which were anaesthetised, paralysed and mechanically ventilated. The clearance of the radiolabeled tracer molecule 99mTc-DTPA from airways to the blood was expressed as changes in counts/min corrected for background. For each guinea-pig, 99mTc-DTPA clearance was assessed before and after i.v. PAF administration, when tracheal pressure had returned to near control values. Doses of 10, 50 and 100 ng/kg of PAF caused dose-dependent increases in 99mTc-DTPA clearance of 7 +/- 3%, 38 +/- 7% and 65 +/- 11% respectively. The respective effects of 0.5 mg/kg of the beta 2-adrenergic agonist salbutamol and 0.3 mg/kg of the alpha 1-adrenergic agonist methoxamine on the increase in lung epithelial permeability induced by 50 ng/kg PAF were also studied. Salbutamol significantly reduced the acute bronchoconstrictor effects of PAF, but did not affect the increase in lung epithelial permeability, which was 58 +/- 10%. Conversely, methoxamine significantly enhanced the bronchoconstrictor effects of PAF but inhibited the lung epithelial permeability increase, which was only 10 +/- 13%. In the absence of PAF, salbutamol significantly increased this permeability by 49 +/- 11%, whereas methoxamine alone slightly reduced, it by -11 +/- 4%. These results demonstrate that PAF increases lung epithelial permeability and suggest that vascular surface area recruitment may explain this increase.
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Affiliation(s)
- I Macquin-Mavier
- Département de Physiologie, Recherche Médicale INSERM U296, Hôpital Henri Mondor, Créteil, France
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Macquin-Mavier I, Clerici C, Franco-Montoya ML, Harf A. Mechanism of histamine-induced epinephrine release in guinea pig. J Pharmacol Exp Ther 1988; 247:706-9. [PMID: 2903238] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The aims of this study were to provide direct evidence that in anesthetized guinea pigs i.v. administration of histamine induces sympathoadrenal activation and to identify the source and mechanism of histamine-induced epinephrine release. Plasma epinephrine measurements were used as the index of sympathoadrenal activity. In intact guinea pigs, histamine infusion caused a 3-fold rise in plasma epinephrine levels. In guinea pigs pretreated with 6-hydroxydopamine to obtain chemical sympathectomy, the rise in plasma epinephrine induced by histamine was distinctly smaller than in controls. This rise was completely inhibited in guinea pigs pretreated with the ganglion blocking agent hexamethonium and in pithed guinea pigs. Pretreatment with the H2-receptor antagonist cimetidine or the H1-receptor antagonist mepyramine reduced the rise in plasma epinephrine. These results demonstrate that in guinea pigs, epinephrine is released not only from the adrenal medulla but also from nerve endings and that histamine releases epinephrine by indirect action through central reflex pathways.
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Affiliation(s)
- I Macquin-Mavier
- Service de Pharmacologie Clinique, Hôpital Henri Mondor, Créteil, France
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