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Schaunaman N, Cervantes D, Nichols T, Numata M, Ledford JG, Kraft M, Chu HW. Cooperation of immune regulators Tollip and surfactant protein A inhibits influenza A virus infection in mice. Respir Res 2024; 25:193. [PMID: 38702733 PMCID: PMC11068576 DOI: 10.1186/s12931-024-02820-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 04/23/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Influenza A virus (IAV) infection is a significant risk factor for respiratory diseases, but the host defense mechanisms against IAV remain to be defined. Immune regulators such as surfactant protein A (SP-A) and Toll-interacting protein (Tollip) have been shown to be involved in IAV infection, but whether SP-A and Tollip cooperate in more effective host defense against IAV infection has not been investigated. METHODS Wild-type (WT), Tollip knockout (KO), SP-A KO, and Tollip/SP-A double KO (dKO) mice were infected with IAV for four days. Lung macrophages were isolated for bulk RNA sequencing. Precision-cut lung slices (PCLS) from WT and dKO mice were pre-treated with SP-A and then infected with IAV for 48 h. RESULTS Viral load was significantly increased in bronchoalveolar lavage (BAL) fluid of dKO mice compared to all other strains of mice. dKO mice had significantly less recruitment of neutrophils into the lung compared to Tollip KO mice. SP-A treatment of PCLS enhanced expression of TNF and reduced viral load in dKO mouse lung tissue. Pathway analysis of bulk RNA sequencing data suggests that macrophages from IAV-infected dKO mice reduced expression of genes involved in neutrophil recruitment, IL-17 signaling, and Toll-like receptor signaling. CONCLUSIONS Our data suggests that both Tollip and SP-A are essential for the lung to exert more effective innate defense against IAV infection.
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Affiliation(s)
- Niccolette Schaunaman
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Room A639, Denver, CO, 80206, USA
| | - Diana Cervantes
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Room A639, Denver, CO, 80206, USA
| | - Taylor Nichols
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Room A639, Denver, CO, 80206, USA
| | - Mari Numata
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Room A639, Denver, CO, 80206, USA
| | | | - Monica Kraft
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Hong Wei Chu
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Room A639, Denver, CO, 80206, USA.
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Brudon A, Legendre M, Mageau A, Bermudez J, Bonniaud P, Bouvry D, Cadranel J, Cazes A, Crestani B, Dégot T, Delestrain C, Diesler R, Epaud R, Philippot Q, Théou-Anton N, Kannengiesser C, Ba I, Debray MP, Fanen P, Manali E, Papiris S, Nathan N, Amselem S, Gondouin A, Guillaumot A, Andréjak C, Jouneau S, Beltramo G, Uzunhan Y, Galodé F, Westeel V, Mehdaoui A, Hirschi S, Leroy S, Marchand-Adam S, Nunes H, Picard C, Prévot G, Reynaud-Gaubert M, De Vuyst P, Wemeau L, Defossez G, Zalcman G, Cottin V, Borie R. High risk of lung cancer in surfactant-related gene variant carriers. Eur Respir J 2024; 63:2301809. [PMID: 38575158 PMCID: PMC11063619 DOI: 10.1183/13993003.01809-2023] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 02/19/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Several rare surfactant-related gene (SRG) variants associated with interstitial lung disease are suspected to be associated with lung cancer, but data are missing. We aimed to study the epidemiology and phenotype of lung cancer in an international cohort of SRG variant carriers. METHODS We conducted a cross-sectional study of all adults with SRG variants in the OrphaLung network and compared lung cancer risk with telomere-related gene (TRG) variant carriers. RESULTS We identified 99 SRG adult variant carriers (SFTPA1 (n=18), SFTPA2 (n=31), SFTPC (n=24), ABCA3 (n=14) and NKX2-1 (n=12)), including 20 (20.2%) with lung cancer (SFTPA1 (n=7), SFTPA2 (n=8), SFTPC (n=3), NKX2-1 (n=2) and ABCA3 (n=0)). Among SRG variant carriers, the odds of lung cancer was associated with age (OR 1.04, 95% CI 1.01-1.08), smoking (OR 20.7, 95% CI 6.60-76.2) and SFTPA1/SFTPA2 variants (OR 3.97, 95% CI 1.39-13.2). Adenocarcinoma was the only histological type reported, with programmed death ligand-1 expression ≥1% in tumour cells in three samples. Cancer staging was localised (I/II) in eight (40%) individuals, locally advanced (III) in two (10%) and metastatic (IV) in 10 (50%). We found no somatic variant eligible for targeted therapy. Seven cancers were surgically removed, 10 received systemic therapy, and three received the best supportive care according to their stage and performance status. The median overall survival was 24 months, with stage I/II cancers showing better survival. We identified 233 TRG variant carriers. The comparative risk (subdistribution hazard ratio) for lung cancer in SRG patients versus TRG patients was 18.1 (95% CI 7.1-44.7). CONCLUSIONS The high risk of lung cancer among SRG variant carriers suggests specific screening and diagnostic and therapeutic challenges. The benefit of regular computed tomography scan follow-up should be evaluated.
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Affiliation(s)
- Alexandre Brudon
- Service d'Oncologie Thoracique, Hôpital Bichat, AP-HP, Institut du Cancer AP-HP Nord, Paris, France
- Université Paris Cité, Inserm CIC-EC 1425, Paris, France
- A. Brudon and M. Legendre contributed equally to this work
| | - Marie Legendre
- UF de Génétique Moléculaire, Hôpital Armand Trousseau, AP-HP, Paris, France
- Sorbonne Université, Inserm UMR-S 933, Maladies Génétiques d'Expression Pédiatrique, Paris, France
- A. Brudon and M. Legendre contributed equally to this work
| | - Arthur Mageau
- Département de Médecine Interne, Hôpital Bichat, AP-HP, Paris, France
- Université Paris Cité, Inserm IAME UMR 1137 Team Descid, Paris, France
| | - Julien Bermudez
- Service de Pneumologie, Centre de Compétences de Maladies Pulmonaires Rares et de Transplantation Pulmonaire, CHU Nord, AP-HM, Marseille, France
- Aix-Marseille Université, Marseille, France
| | - Philippe Bonniaud
- Department of Respiratory Diseases and Intensive Care, Reference Constitutive Center for Adult Rare Pulmonary Diseases, Dijon-Bourgogne University Hospital, University of Burgundy, Inserm UMR1231, Dijon, France
| | - Diane Bouvry
- Département de Pneumologie, Hôpital Avicenne, AP-HP, Bobigny, France
- Université Paris 13, Inserm UMR U1272, Bobigny, France
| | - Jacques Cadranel
- Service de Pneumologie et Oncologie Thoracique, DMU APPROCHES, Hôpital Tenon, AP-HP, Paris, France
- Sorbonne Université, GRC04 Theranoscan, Paris, France
| | - Aurélie Cazes
- Département d'Anatomie Pathologique, Hôpital Bichat, AP-HP, Paris, France
- Université Paris Cité, Inserm UMR-S 1152 PHERE, Paris, France
| | - Bruno Crestani
- Université Paris Cité, Inserm UMR-S 1152 PHERE, Paris, France
- Service de Pneumologie A, Hôpital Bichat, AP-HP, Paris, France
| | - Tristan Dégot
- Centre de Référence pour les Maladies Respiratoires Rares RespiRare, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Céline Delestrain
- Université de Paris Est Créteil, Inserm IMRB, Créteil, France
- Service de Pneumologie, Centre National Coordinateur de Référence des Pathologies Pulmonaires Rares, ERN-LUNG, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
| | - Rémi Diesler
- Université Claude Bernard Lyon 1, Lyon, France
- Département de Génétique, Hôpital Bichat, AP-HP, Institut du Cancer AP-HP Nord, Paris, France
| | - Ralph Epaud
- Centre de Référence pour les Maladies Respiratoires Rares RespiRare, Centre Hospitalier Intercommunal de Créteil, Créteil, France
- Université de Paris Est Créteil, Inserm IMRB, Créteil, France
| | - Quentin Philippot
- Université Paris Cité, Inserm UMR-S 1152 PHERE, Paris, France
- Service de Pneumologie A, Hôpital Bichat, AP-HP, Paris, France
| | - Nathalie Théou-Anton
- Université Paris Cité, Paris, France
- Service de Radiologie, Hôpital Bichat, AP-HP, Paris, France
| | - Caroline Kannengiesser
- Département de Génétique, Hôpital Bichat, AP-HP, Institut du Cancer AP-HP Nord, Paris, France
- Université Paris Cité, Paris, France
| | - Ibrahima Ba
- Département de Génétique, Hôpital Bichat, AP-HP, Institut du Cancer AP-HP Nord, Paris, France
- Université Paris Cité, Paris, France
| | - Marie-Pierre Debray
- Université Paris Cité, Paris, France
- Service de Radiologie, Hôpital Bichat, AP-HP, Paris, France
| | - Pascale Fanen
- Université de Paris Est Créteil, Inserm IMRB, Créteil, France
- Service de Radiologie, Hôpital Bichat, AP-HP, Paris, France
| | - Efrosine Manali
- Département de Pneumologie Pédiatrique, Centre de Référence des Maladies Respiratoires Rares RespiRare, Paris, France
| | - Spyros Papiris
- General University Hospital "Attikon", Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nadia Nathan
- Sorbonne Université, Inserm UMR-S 933, Maladies Génétiques d'Expression Pédiatrique, Paris, France
- Service de Pneumologie, Centre des Maladies Pulmonaires Rares, Hôpital de Besançon, Besançon, France
| | - Serge Amselem
- UF de Génétique Moléculaire, Hôpital Armand Trousseau, AP-HP, Paris, France
- Sorbonne Université, Inserm UMR-S 933, Maladies Génétiques d'Expression Pédiatrique, Paris, France
| | - Antoine Gondouin
- Service de Pneumologie, Hôpital de Brabois, Vandoeuvre-les-Nancy, France
| | - Anne Guillaumot
- Respiratory and Intensive Care Unit, University Hospital Amiens, Amiens, France
| | - Claire Andréjak
- EA 4294, AGIR, Jules Verne Picardy University, Amiens, France
- Service de Pneumologie, Centre de Référence Maladies Pulmonaires Rares, Hôpital Pontchaillou, CHU Rennes, Inserm UMR1085 IRSET, Université de Rennes 1, EHESP, Rennes, France
| | - Stephane Jouneau
- Pediatrics Department, Pediatric Pulmonology, CHU Bordeaux, Bordeaux, France
| | - Guillaume Beltramo
- Department of Respiratory Diseases and Intensive Care, Reference Constitutive Center for Adult Rare Pulmonary Diseases, Dijon-Bourgogne University Hospital, University of Burgundy, Inserm UMR1231, Dijon, France
| | - Yurdagul Uzunhan
- Département de Pneumologie, Hôpital Avicenne, AP-HP, Bobigny, France
| | - François Galodé
- Pneumonology and Thoracic Oncology Department, Eure-Seine Hospital Center, Évreux, France
| | - Virginie Westeel
- Service de Pneumologie, Centre des Maladies Pulmonaires Rares, Hôpital de Besançon, Besançon, France
| | - Anas Mehdaoui
- Service de pneumologie, FHU Oncoage, Hôpital Pasteur - CHU Nice, Nice, France
| | - Sandrine Hirschi
- Service de Pneumologie, Groupe de Transplantation Pulmonaire, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Sylvie Leroy
- Université Nice Côte d'Azur, Nice, France
- Service de Pneumologie, Hôpital de Tours, Tours, France
| | - Sylvain Marchand-Adam
- Université de Tours, Inserm U1100, Tours, France
- Service de Pneumologie et de Transplantation Pulmonaire, Hôpital Foch, Suresnes, France
| | - Hilario Nunes
- Département de Pneumologie, Hôpital Avicenne, AP-HP, Bobigny, France
- Université Paris 13, Inserm UMR U1272, Bobigny, France
| | - Clément Picard
- Service de Pneumologie, Hôpital Larrey, Toulouse, France
| | | | - Martine Reynaud-Gaubert
- Service de Pneumologie, Centre de Compétences de Maladies Pulmonaires Rares et de Transplantation Pulmonaire, CHU Nord, AP-HM, Marseille, France
- Aix-Marseille Université, Marseille, France
| | - Paul De Vuyst
- Service de Pneumologie et Immuno-allergie, Institut Coeur-Poumon, Lille, France
| | | | | | - Gérard Zalcman
- Service d'Oncologie Thoracique, Hôpital Bichat, AP-HP, Institut du Cancer AP-HP Nord, Paris, France
- Université Paris Cité, Inserm CIC-EC 1425, Paris, France
| | - Vincent Cottin
- Service de Pneumologie, Centre National Coordinateur de Référence des Pathologies Pulmonaires Rares, ERN-LUNG, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
- Université Claude Bernard Lyon 1, Lyon, France
| | - Raphael Borie
- Université Paris Cité, Inserm UMR-S 1152 PHERE, Paris, France
- Service de Pneumologie A, Hôpital Bichat, AP-HP, Paris, France
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Guan Z, Worth B, Umstead TM, Amatya S, Booth J, Chroneos ZC. Disruption of the SP-A/SP-R210 L (MYO18Aα) pathway prolongs gestation and reduces fetal survival during lipopolysaccharide-induced parturition in late gestation. Am J Physiol Lung Cell Mol Physiol 2024; 326:L508-L513. [PMID: 38349123 DOI: 10.1152/ajplung.00383.2023] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/25/2024] [Accepted: 02/05/2024] [Indexed: 04/07/2024] Open
Abstract
Prolonged labor can lead to infection, fetal distress, asphyxia, and life-threatening harm to both the mother and the baby. Surfactant protein A (SP-A) was shown to contribute to the maintenance of pregnancy and timing of term labor. SP-A modulates the stoichiometric expression of the SP-R210L and SP-R210S isoforms of the SP-R210 receptor on alveolar macrophages (AMs). Lack of SP-R210L dysregulates macrophage inflammatory responses. We asked whether SP-A alters normal and inflammation-induced parturition through SP-R210 using SP-A- and SP-R210L-deficient mice. Labor and delivery of time-pregnant mice were monitored in real time using a time-lapse infrared camera. Intrauterine injection with either vehicle or Escherichia coli lipopolysaccharide (LPS) on embryonic (E) day 18.5 post coitus was used to assess the effect of gene disruption in chorioamnionitis-induced labor. We report that either lack of SP-A or disruption of SP-R210L delays parturition by 0.40 and 0.55 days compared with controls, respectively. LPS induced labor at 0.60, 1.01, 0.40, 1.00, and 1.31 days earlier than PBS controls in wild type (WT), SP-A-deficient, littermate controls, heterozygous, and homozygous SP-R210L-deficient mice, respectively. Lack of SP-A reduced litter size in PBS-treated mice, whereas the total number of pups delivered was similar in all LPS-treated mice. The number of live pups, however, was significantly reduced by 50%-70% in SP-A and SP-R210L-deficient mice compared with controls. Differences in gestational length were not associated with intrauterine growth restriction. The present findings support the novel concept that the SP-A/SP-R210 pathway modulates timely labor and delivery and supports fetal lung barrier integrity during fetal-to-neonatal transition in term pregnancy.NEW & NOTEWORTHY To our knowledge, this study is the first to report that SP-A prevents delay of labor and inflammation-induced stillbirth through the receptor SP-R210L.
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Affiliation(s)
- Zhiwei Guan
- Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
| | - Brandon Worth
- Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
| | - Todd M Umstead
- Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
| | - Shaili Amatya
- Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
| | - Jennifer Booth
- Department of Comparative Medicine, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
| | - Zissis C Chroneos
- Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States
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Jacob IB, Gemmiti A, Xiong W, Reynolds E, Nicholas B, Thangamani S, Jia H, Wang G. Human surfactant protein A inhibits SARS-CoV-2 infectivity and alleviates lung injury in a mouse infection model. Front Immunol 2024; 15:1370511. [PMID: 38596675 PMCID: PMC11002091 DOI: 10.3389/fimmu.2024.1370511] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/11/2024] [Indexed: 04/11/2024] Open
Abstract
Introduction SARS coronavirus 2 (SARS-CoV-2) infects human angiotensin-converting enzyme 2 (hACE2)-expressing lung epithelial cells through its spike (S) protein. The S protein is highly glycosylated and could be a target for lectins. Surfactant protein A (SP-A) is a collagen-containing C-type lectin, expressed by mucosal epithelial cells and mediates its antiviral activities by binding to viral glycoproteins. Objective This study examined the mechanistic role of human SP-A in SARS-CoV-2 infectivity and lung injury in vitro and in vivo. Results Human SP-A can bind both SARS-CoV-2 S protein and hACE2 in a dose-dependent manner (p<0.01). Pre-incubation of SARS-CoV-2 (Delta) with human SP-A inhibited virus binding and entry and reduced viral load in human lung epithelial cells, evidenced by the dose-dependent decrease in viral RNA, nucleocapsid protein (NP), and titer (p<0.01). We observed significant weight loss, increased viral burden, and mortality rate, and more severe lung injury in SARS-CoV-2 infected hACE2/SP-A KO mice (SP-A deficient mice with hACE2 transgene) compared to infected hACE2/mSP-A (K18) and hACE2/hSP-A1 (6A2) mice (with both hACE2 and human SP-A1 transgenes) 6 Days Post-infection (DPI). Furthermore, increased SP-A level was observed in the saliva of COVID-19 patients compared to healthy controls (p<0.05), but severe COVID-19 patients had relatively lower SP-A levels than moderate COVID-19 patients (p<0.05). Discussion Collectively, human SP-A attenuates SARS-CoV-2-induced acute lung injury (ALI) by directly binding to the S protein and hACE2, and inhibiting its infectivity; and SP-A level in the saliva of COVID-19 patients might serve as a biomarker for COVID-19 severity.
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Affiliation(s)
- Ikechukwu B. Jacob
- Department of Surgery, the State University of New York (SUNY) Upstate Medical University, Syracuse, NY, United States
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Amanda Gemmiti
- Department of Otolaryngology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Weichuan Xiong
- Department of Surgery, the State University of New York (SUNY) Upstate Medical University, Syracuse, NY, United States
| | - Erin Reynolds
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Brian Nicholas
- Department of Otolaryngology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Saravanan Thangamani
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Hongpeng Jia
- Department of Surgery, Johns-Hopkins University, Baltimore, MD, United States
| | - Guirong Wang
- Department of Surgery, the State University of New York (SUNY) Upstate Medical University, Syracuse, NY, United States
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
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Wu H, Zhou Q, Xiong H, Wang C, Cui Y, Qi K, Liu H. Goose surfactant protein A inhibits the growth of avian pathogenic Escherichia coli via an aggregation-dependent mechanism that decreases motility and increases membrane permeability. Dev Comp Immunol 2023; 139:104592. [PMID: 36414098 DOI: 10.1016/j.dci.2022.104592] [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] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 11/16/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
Pulmonary collectins have been reported to bind carbohydrates on pathogens and inhibit infection by agglutination, neutralization, and opsonization. In this study, surfactant protein A (SP-A) was identified from goose lung and characterized at expression- and agglutination-functional levels. The deduced amino acid sequence of goose surfactant protein A (gSP-A) has two characteristic structures: a shorter, collagen-like region and a carbohydrate recognition domain. The latter contains two conserved motifs in its Ca2+-binding site: EPN (Glu-Pro-Asn) and WND (Trp-Asn-Asp). Expression analysis using qRT-PCR and fluorescence IHC revealed that gSP-A was highly expressed in the air sac and present in several other tissues, including the lung and trachea. We went on to produce recombinant gSP-A (RgSP-A) using a baculovirus/insect cell system and purified using a Ni2+ affinity column. A biological activity assay showed that all bacterial strains tested in this study were aggregated by RgSP-A, but only Escherichia coli AE17 (E. coli AE17, O2) and E. coli AE158 (O78) were susceptible to RgSP-A-mediated growth inhibition at 2-6 h. Moreover, the swarming motility of the two bacterial strains were weakened with increasing RgSP-A concentration, and their membrane permeability was compromised at 3 h, as determined by flow cytometry and laser confocal microscopy. Therefore, RgSP-A is capable of reducing bacterial viability of E. coli O2 and O78 via an aggregation-dependent mechanism which involves decreasing motility and increasing the bacterial membrane permeability. These data will facilitate detailed studies into the role of gSP-A in innate immune defense as well as for development of antibacterial agents.
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Affiliation(s)
- Hanwen Wu
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Qian Zhou
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Haifeng Xiong
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Chenxiao Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Yaqian Cui
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Kezong Qi
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Hongmei Liu
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China.
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Emery L, Kane E, Anderson-Fears K, Liu D, Floros J, Gandhi CK. Association of surfactant protein A2 with acute respiratory failure in children. Pediatr Int 2023; 65:e15672. [PMID: 37888536 PMCID: PMC10617656 DOI: 10.1111/ped.15672] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/23/2023] [Accepted: 09/06/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND Interactions among single nucleotide polymorphisms (SNPs) of surfactant protein (SP) are associated with acute respiratory failure (ARF) and its short-term outcome, pulmonary dysfunction at discharge (PDAD) in children. However, genetic association studies using individual SNPs have not been conducted before. We hypothesize that SP genetic variants are associated with pediatric ARF and its short-term complications by themselves. METHODS We used available genotype and clinical data in the Floros biobank consisting of 248 children aged ≤24 months with ARF; 86 developed PDAD. A logistic regression analysis was performed for each of the 14 selected SNPs, SP-A1 and SP-A2 genotypes. A p-value less than the Bonferroni correction threshold was considered significant. A likelihood ratio test was done to compare two models (one with demographic data and another with genetic variants). RESULTS Before Bonferroni correction, female sex is associated with a decreased risk of ARF. Black race and the rs721917 of the SFTPD are associated with increased risk of ARF. After Bonferroni correction, the 1A0 1A1 genotype of SFTPA2 was associated with decreased risk of ARF. The likelihood ratio test showed that the model of the genotype information with demographic data was a better fit to predict ARF risk. None of the SP SNPs and SP-A1, SP-A2 genotypes were associated with PDAD. CONCLUSION Our results indicate that SNPs and genotypes of SPs involved in innate immunity and host defense play an important role in ARF and, in the future, may be used as biomarkers.
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Affiliation(s)
- Lucy Emery
- Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Elizabeth Kane
- Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Keenan Anderson-Fears
- Department of Public Health Science, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Dajiang Liu
- Department of Public Health Science, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Joanna Floros
- Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
- Department of Obstetrics & Gynecology, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Chintan K Gandhi
- Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
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Takahashi T, Takahashi Y, Fee EL, Usuda H, Furfaro L, Newnham JP, Jobe AH, Kemp MW. Single nucleotide polymorphisms in surfactant protein A1 are not associated with a lack of responsiveness to antenatal steroid therapy in a pregnant sheep model. Physiol Rep 2022; 10:e15477. [PMID: 36200269 PMCID: PMC9535346 DOI: 10.14814/phy2.15477] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/29/2022] [Accepted: 09/04/2022] [Indexed: 06/16/2023] Open
Abstract
Treatment with antenatal steroids (ANS) is standard practice for reducing the risk of respiratory distress in the preterm infant. Despite clear overall benefits when appropriately administered, many fetuses fail to derive benefit from ANS therapies. In standardized experiments using a pregnant sheep model, we have demonstrated that around 40% of ANS-exposed lambs did not have functional lung maturation significantly different from that of saline-treated controls. Surfactant protein A is known to play an important role in lung function. In this genotyping study, we investigated the potential correlation between polymorphisms in SFTPA1, messenger RNA and protein levels, and ventilation outcomes in animals treated with ANS. 45 preterm lambs were delivered 48 h after initial ANS therapy and 44 lambs were delivered 8 days after initial ANS therapy. The lambs were ventilated for 30 min after delivery. SFTPA1 mRNA expression in lung tissue was not correlated with arterial blood PaCO2 values at 30 min of ventilation in lambs delivered 48 h after treatment. SFTPA1 protein in lung tissue was significantly correlated with PaCO2 at 30 min of ventilation in lambs ventilated both 48 h and 8 days after ANS treatment. Six different single nucleotide polymorphisms (SNPs) in the Ovis aries SFTPA1 sequence were detected by Sanger Sequencing. No individual SNPs or SNP haplotypes correlated with alterations in PaCO2 at 30 min of ventilation or SFTPA1 protein levels in the lung. For the subset of animals analyzed in the present study, variable lung maturation responses to ANS therapy were not associated with mutations in SFTPA1.
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Affiliation(s)
- Tsukasa Takahashi
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
- Centre for Perinatal and Neonatal MedicineTohoku University HospitalSendaiJapan
| | - Yuki Takahashi
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
- Centre for Perinatal and Neonatal MedicineTohoku University HospitalSendaiJapan
| | - Erin L. Fee
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
| | - Haruo Usuda
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
- Centre for Perinatal and Neonatal MedicineTohoku University HospitalSendaiJapan
| | - Lucy Furfaro
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
| | - John P. Newnham
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
| | - Alan H. Jobe
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
- Perinatal Research, Department of PediatricsCincinnati Children's Hospital Medical Centre, University of CincinnatiCincinnatiOhioUSA
| | - Matthew W. Kemp
- Division of Obstetrics and GynaecologyThe University of Western AustraliaPerthWestern AustraliaAustralia
- Centre for Perinatal and Neonatal MedicineTohoku University HospitalSendaiJapan
- School of Veterinary and Life SciencesMurdoch UniversityPerthWestern AustraliaAustralia
- Department of Obstetrics and GynaecologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
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8
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Depicolzuane LC, Roberts CM, Thomas NJ, Anderson-Fears K, Liu D, Barbosa JPP, Souza FR, Pimentel AS, Floros J, Gandhi CK. Hydrophilic But Not Hydrophobic Surfactant Protein Genetic Variants Are Associated With Severe Acute Respiratory Syncytial Virus Infection in Children. Front Immunol 2022; 13:922956. [PMID: 35903101 PMCID: PMC9317530 DOI: 10.3389/fimmu.2022.922956] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/07/2022] [Indexed: 11/13/2022] Open
Abstract
Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infection-related hospitalization in the first year of life. Surfactant dysfunction is central to pathophysiologic mechanisms of various pulmonary diseases including RSV. We hypothesized that RSV severity is associated with single nucleotide polymorphisms (SNPs) of surfactant proteins (SPs). We prospectively enrolled 405 RSV-positive children and divided them into moderate and severe RSV disease. DNA was extracted and genotyped for sixteen specific SP gene SNPs. SP-A1 and A2 haplotypes were assigned. The association of RSV severity with SP gene SNPs was investigated by multivariate logistic regression. A likelihood ratio test was used to test the goodness of fit between two models (one with clinical and demographic data alone and another that included genetic variants). p ≤ 0.05 denotes statistical significance. A molecular dynamics simulation was done to determine the impact of the SFTPA2 rs1965708 on the SP-A behavior under various conditions. Infants with severe disease were more likely to be younger, of lower weight, and exposed to household pets and smoking, as well as having co-infection on admission. A decreased risk of severe RSV was associated with the rs17886395_C of the SFTPA2 and rs2243639_A of the SFTPD, whereas an increased risk was associated with the rs1059047_C of the SFTPA1. RSV severity was not associated with SNPs of SFTPB and SFTPC. An increased risk of severe RSV was associated with the 1A0 genotype of SFTPA2 in its homozygous or heterozygous form with 1A3. A molecular dynamic simulation study of SP-A variants that differ in amino acid 223, an important amino acid change (Q223K) between 1A0 and 1A3, showed no major impact on the behavior of these two variants except for higher thermodynamic stability of the K223 variant. The likelihood ratio test showed that the model with multi-allelic variants along with clinical and demographic data was a better fit to predict RSV severity. In summary, RSV severity was associated with hydrophilic (but not with hydrophobic) SPs gene variants. Collectively, our findings show that SP gene variants may play a key role in RSV infection and have a potential role in prognostication.
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Affiliation(s)
- Lynnlee C. Depicolzuane
- Center for Host defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, PA, United States
| | - Catherine M. Roberts
- Center for Host defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, PA, United States
| | - Neal J. Thomas
- Center for Host defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, PA, United States
| | - Keenan Anderson-Fears
- Department of Public Health Science, The Pennsylvania State College of Medicine, Hershey, PA, United States
| | - Dajiang Liu
- Department of Public Health Science, The Pennsylvania State College of Medicine, Hershey, PA, United States
| | | | - Felipe Rodrigues Souza
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil
| | - André Silva Pimentel
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Joanna Floros
- Center for Host defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, PA, United States
- Department of Obstetrics & Gynecology, The Pennsylvania State College of Medicine, Hershey, PA, United States
- *Correspondence: Joanna Floros, ; Chintan K. Gandhi,
| | - Chintan K. Gandhi
- Center for Host defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State College of Medicine, Hershey, PA, United States
- *Correspondence: Joanna Floros, ; Chintan K. Gandhi,
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9
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Francisco D, Wang Y, Marshall C, Conway M, Addison KJ, Billheimer D, Kimura H, Numata M, Chu HW, Voelker DR, Kraft M, Ledford JG. Small Peptide Derivatives Within the Carbohydrate Recognition Domain of SP-A2 Modulate Asthma Outcomes in Mouse Models and Human Cells. Front Immunol 2022; 13:900022. [PMID: 35874703 PMCID: PMC9304716 DOI: 10.3389/fimmu.2022.900022] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
Surfactant Protein-A (SP-A) is an innate immune modulator that regulates a variety of pulmonary host defense functions. We have shown that SP-A is dysfunctional in asthma, which could be partly due to genetic heterogeneity. In mouse models and primary bronchial epithelial cells from asthmatic participants, we evaluated the functional significance of a particular single nucleotide polymorphism of SP-A2, which results in an amino acid substitution at position 223 from glutamine (Q) to lysine (K) within the carbohydrate recognition domain (CRD). We found that SP-A 223Q humanized mice had greater protection from inflammation and mucin production after IL-13 exposure as compared to SP-A-2 223K mice. Likewise, asthmatic participants with two copies the major 223Q allele demonstrated better lung function and asthma control as compared to asthmatic participants with two copies of the minor SP-A 223K allele. In primary bronchial epithelial cells from asthmatic participants, full-length recombinant SP-A 223Q was more effective at reducing IL-13-induced MUC5AC gene expression compared to SP-A 223K. Given this activity, we developed 10 and 20 amino acid peptides of SP-A2 spanning position 223Q. We show that the SP-A 223Q peptides reduce eosinophilic inflammation, mucin production and airways hyperresponsiveness in a house dust mite model of asthma, protect from lung function decline during an IL-13 challenge model in mice, and decrease IL-13-induced MUC5AC gene expression in primary airway epithelial cells from asthmatic participants. These results suggest that position 223 within the CRD of SP-A2 may modulate several outcomes relevant to asthma, and that short peptides of SP-A2 retain anti-inflammatory properties similar to that of the endogenous protein.
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Affiliation(s)
- Dave Francisco
- Department of Medicine, University of Arizona, Tucson, AZ, United States
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Ying Wang
- Department of Medicine, University of Arizona, Tucson, AZ, United States
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Craig Marshall
- Department of Medicine, University of Arizona, Tucson, AZ, United States
| | - Michelle Conway
- Department of Medicine, University of Arizona, Tucson, AZ, United States
| | - Kenneth J. Addison
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Dean Billheimer
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Hiroki Kimura
- Department of Medicine, University of Arizona, Tucson, AZ, United States
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Mari Numata
- Department of Medicine, National Jewish Health, Denver, CO, United States
| | - Hong W. Chu
- Department of Medicine, National Jewish Health, Denver, CO, United States
| | - Dennis R. Voelker
- Department of Medicine, National Jewish Health, Denver, CO, United States
| | - Monica Kraft
- Department of Medicine, University of Arizona, Tucson, AZ, United States
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
| | - Julie G. Ledford
- Asthma and Airway Disease Research Center, University of Arizona Health Sciences, Tucson, AZ, United States
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, United States
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10
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Thorenoor N, Floros J. The Lung Alveolar Cell (LAC) miRNome and Gene Expression Profile of the SP-A-KO Mice After Infection With and Without Rescue With Human Surfactant Protein-A2 (1A0). Front Immunol 2022; 13:854434. [PMID: 35844510 PMCID: PMC9283764 DOI: 10.3389/fimmu.2022.854434] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/24/2022] [Indexed: 11/13/2022] Open
Abstract
Human surfactant protein (SP)-A1 and SP-A2 exhibit differential qualitative and quantitative effects on the alveolar macrophage (AM), including a differential impact on the AM miRNome. Moreover, SP-A rescue (treatment) of SP-A-knockout (KO) infected mice impoves survival. Here, we studied for the first time the role of exogenous SP-A protein treatment on the regulation of lung alveolar cell (LAC) miRNome, the miRNA-RNA targets, and gene expression of SP-A-KO infected mice of both sexes. Toward this, SP-A-KO mice of both sexes were infected with Klebsiella pneumoniae, and half of them were also treated with SP-A2 (1A0). After 6 h of infection/SP-A treatment, the expression levels and pathways of LAC miRNAs, genes, and target miRNA-mRNAs were studied in both groups. We found 1) significant differences in the LAC miRNome, genes, and miRNA-mRNA targets in terms of sex, infection, and infection plus SP-A2 (1A0) protein rescue; 2) an increase in the majority of miRNA-mRNA targets in both study groups in KO male vs. female mice and involvement of the miRNA-mRNA targets in pathways of inflammation, antiapoptosis, and cell cycle; 3) genes with significant changes to be involved in TP-53, tumor necrosis factor (TNF), and cell cycle signaling nodes; 4) when significant changes in the expression of molecules from all analyses (miRNAs, miRNA-mRNA targets, and genes) were considered, two signaling pathways, the TNF and cell cycle, referred to as “integrated pathways” were shown to be significant; 5) the cell cycle pathway to be present in all comparisons made. Because SP-A could be used therapeutically in pulmonary diseases, it is important to understand the molecules and pathways involved in response to an SP-A acute treatment. The information obtained contributes to this end and may help to gain insight especially in the case of infection.
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Affiliation(s)
- Nithyananda Thorenoor
- Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
- Department of Biochemistry and Molecular Biology, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Joanna Floros
- Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
- Department of Obstetrics and Gynecology, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
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11
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Awasthi S, Kumar G, Ramani V, Awasthi V, Rodgers KK, Xie J, Beierle J, Kyere-Davies G, Singh B, Rahman N, Chowdhury AA, Chataut N. Mechanism of Anti-Inflammatory Activity of TLR4-Interacting SPA4 Peptide. Immunohorizons 2021; 5:659-674. [PMID: 34429343 PMCID: PMC8673433 DOI: 10.4049/immunohorizons.2100067] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 07/20/2021] [Indexed: 12/05/2022] Open
Abstract
The TLR4-interacting SPA4 peptide suppresses inflammation. We assessed the structural and physicochemical properties and binding of SPA4 peptide to TLR4-MD2. We also studied the changes at the whole transcriptome level, cell morphology, viability, secreted cytokines and chemokines, and cell influx in cell systems and mouse models challenged with LPS and treated with SPA4 peptide. Our results demonstrated that the SPA4 peptide did not alter the cell viability and size and only moderately affected the transcriptome of the cells. Computational docking and rendering suggested that the SPA4 peptide intercalates with LPS-induced TLR4-MD2 complex. Results with alanine mutations of D-2 amino acid and NYTXXXRG-12-19 motif of SPA4 peptide suggested their role in binding to TLR4 and in reducing the cytokine response against LPS stimulus. Furthermore, therapeutically administered SPA4 peptide significantly suppressed the secreted levels of cytokines and chemokines in cells and bronchoalveolar lavage fluids of LPS-challenged mice. The results suggest that the SPA4 peptide intercalates with LPS-induced TLR4 complex and signaling for the suppression of inflammation.
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Affiliation(s)
- Shanjana Awasthi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK;
| | - Gaurav Kumar
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Vijay Ramani
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Vibhudutta Awasthi
- Research Imaging Facility, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK; and
| | - Karla K Rodgers
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Jun Xie
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Jacob Beierle
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Gertrude Kyere-Davies
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Bhupinder Singh
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Negar Rahman
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Asif Alam Chowdhury
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Neha Chataut
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK
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12
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Bocking T, Singh B. Light and electron-microscopic localization of CD9 and surfactant protein A and D in normal lungs of the horse. Can J Vet Res 2021; 85:170-176. [PMID: 34248260 PMCID: PMC8243805] [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] [Received: 01/03/2021] [Accepted: 02/05/2021] [Indexed: 06/13/2023]
Abstract
The lung is a complex organ, and its physiology and immunology are regulated by various immune molecules and cells. Lung surfactant, a mixture of phospholipids and proteins produced by the bronchiolar and type II alveolar epithelial cells, is one such important player in lung physiology. Compared to knowledge about the biology of the surfactant in rodents and humans, only limited data are available on the surfactant in the horse. Although there are data linking levels of surfactant proteins with respiratory disease in the horse, there are no data on the cellular localization of surfactant protein A (SP-A) and surfactant protein D (SP-D). A member of the tetraspanin family of proteins, CD9 is a cell-signaling and adhesion protein and its expression has been detected in both normal and cancer cells, including those in the lung. Because there are no immunolocalization data on SP-A, SP-D, and CD9 in the normal lungs of the horse, our objective was to conduct a light and electron microscopic immunocytochemical study on normal lungs of the horse. The data showed SP-A and SP-D in bronchiolar epithelial and type II alveolar epithelial cells. These proteins were also localized in type I alveolar epithelial cells, pulmonary intravascular macrophages, and neutrophils, which is likely an outcome of endocytosis of the proteins by these cells. CD9 was present in the airway and vascular smooth muscle cells, endothelium, and blood cells, but not in the airway epithelium. These new data provide a baseline to further examine the expression and functions of SP-A, SP-D, and CD9 proteins in inflammation associated with respiratory diseases in the horse.
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Affiliation(s)
- Tara Bocking
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4
| | - Baljit Singh
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4
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13
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Pederson WP, Cyphert-Daly JM, Tighe RM, Que LG, Ledford JG. Genetic variation in surfactant protein-A2 alters responses to ozone. PLoS One 2021; 16:e0247504. [PMID: 33617569 PMCID: PMC7899376 DOI: 10.1371/journal.pone.0247504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 02/08/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Increased exposure to Ozone (O3) is associated with adverse health effects in individuals afflicted with respiratory diseases. Surfactant protein-A (SP-A), encoded by SP-A1 and SP-A2, is the largest protein component in pulmonary surfactant and is functionally impaired by O3-oxidation. OBJECTIVE We used humanized SP-A2 transgenic mice with allelic variation corresponding to a glutamine (Q) to lysine (K) amino acid substitution at position 223 in the lectin domain to determine the impact of this genetic variation in regards to O3 exposure. METHODS Mice were exposed to 2ppm O3 or Filtered Air (FA) for 3 hours and 24 hrs post-challenge pulmonary function tests and other parameters associated with inflammation were assessed in the bronchoalveolar lavage (BAL) fluid and lung tissue. Additionally, mouse tracheal epithelial cells were cultured and TEER measurements recorded for each genotype to determine baseline epithelial integrity. RESULTS Compared to FA, O3 exposure led to significantly increased sensitivity to methacholine challenge in all groups of mice. SP-A2 223Q variant mice were significantly protected from O3-induced AHR compared to SP-A-/- and SP-A2 223K mice. Neutrophilia was observed in all genotypes of mice post O3-exposure, however, SP-A2 223Q mice had a significantly lower percentage of neutrophils compared to SP-A-/- mice. Albumin levels in BAL were unchanged in O3-exposed SP-A2 223Q mice compared to their FA controls, while levels were significantly increased in all other genotypes of O3-exposed mice. SP-A 223Q MTECS has significant higher TEER values than all other genotypes, and WT MTECS has significantly higher TEER than the SP-A KO and SP-A 223K MTECS. SIGNIFICANCE Taken together, our study suggests that expression of a glutamine (Q) as position 223 in SP-A2, as opposed to expression of lysine (K), is more protective in acute exposures to ozone and results in attenuated O3-induced AHR, neutrophilia, and vascular permeability.
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Affiliation(s)
- William P. Pederson
- Department of Physiology, University of Arizona, Tucson, Arizona, United States of America
| | - Jaime M. Cyphert-Daly
- Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Robert M. Tighe
- Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Loretta G. Que
- Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Julie G. Ledford
- Asthma and Airways Disease Research Center, Tucson, Arizona, United States of America
- Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, United States of America
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14
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Ran R, Cai D, King SD, Que X, Bath JM, Chen SY. Surfactant Protein A, a Novel Regulator for Smooth Muscle Phenotypic Modulation and Vascular Remodeling-Brief Report. Arterioscler Thromb Vasc Biol 2021; 41:808-814. [PMID: 33267655 PMCID: PMC8105259 DOI: 10.1161/atvbaha.120.314622] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The objective of this study is to determine the role of SPA (surfactant protein A) in vascular smooth muscle cell (SMC) phenotypic modulation and vascular remodeling. Approach and Results: PDGF-BB (Platelet-derived growth factor-BB) and serum induced SPA expression while downregulating SMC marker gene expression in SMCs. SPA deficiency increased the contractile protein expression. Mechanistically, SPA deficiency enhanced the expression of myocardin and TGF (transforming growth factor)-β, the key regulators for contractile SMC phenotype. In vivo, SPA was induced in medial and neointimal SMCs following mechanical injury in both rat and mouse carotid arteries. SPA knockout in mice dramatically attenuated the wire injury-induced intimal hyperplasia while restoring SMC contractile protein expression in medial SMCs. These data indicate that SPA plays an important role in SMC phenotype modulation and vascular remodeling in vivo. CONCLUSIONS SPA is a novel protein factor modulating SMC phenotype. Blocking the abnormal elevation of SPA may be a potential strategy to inhibit the development of proliferative vascular diseases.
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MESH Headings
- Animals
- Becaplermin/pharmacology
- Carotid Arteries/drug effects
- Carotid Arteries/metabolism
- Carotid Arteries/pathology
- Carotid Artery Injuries/genetics
- Carotid Artery Injuries/metabolism
- Carotid Artery Injuries/pathology
- Cells, Cultured
- Disease Models, Animal
- Hyperplasia
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Neointima
- Nuclear Proteins/metabolism
- Phenotype
- Pulmonary Surfactant-Associated Protein A/genetics
- Pulmonary Surfactant-Associated Protein A/metabolism
- Rats, Sprague-Dawley
- Signal Transduction
- Trans-Activators/metabolism
- Transforming Growth Factor beta1/metabolism
- Vascular Remodeling/drug effects
- Mice
- Rats
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Affiliation(s)
- Ran Ran
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA
| | - Dunpeng Cai
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
- Department of Medical Pharmacology & Physiology, University of Missouri School of Medicine, Columbia, MO
| | - Skylar D. King
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
| | - Xingyi Que
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
| | - Jonathan M. Bath
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
- The Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO 65212
| | - Shi-You Chen
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA
- Department of Medical Pharmacology & Physiology, University of Missouri School of Medicine, Columbia, MO
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15
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Abstract
The lung has long been a target for gene therapy, yet efficient delivery and phenotypic disease correction has remained challenging. Although there have been significant advancements in gene therapies of other organs, including the development of several ex vivo therapies, in vivo therapeutics of the lung have been slower to transition to the clinic. Within the past few years, the field has witnessed an explosion in the development of new gene addition and gene editing strategies for the treatment of monogenic disorders. In this review, we will summarize current developments in gene therapy for cystic fibrosis, alpha-1 antitrypsin deficiency, and surfactant protein deficiencies. We will explore the different gene addition and gene editing strategies under investigation and review the challenges of delivery to the lung.
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Affiliation(s)
- Amber Vu
- Stead Family Department of Pediatrics, Center for Gene Therapy, The University of Iowa, Iowa City, Iowa, USA
| | - Paul B. McCray
- Stead Family Department of Pediatrics, Center for Gene Therapy, The University of Iowa, Iowa City, Iowa, USA
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16
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Francisco D, Wang Y, Conway M, Hurbon AN, Dy ABC, Addison KJ, Chu HW, Voelker DR, Ledford JG, Kraft M. Surfactant Protein-A Protects against IL-13-Induced Inflammation in Asthma. J Immunol 2020; 204:2829-2839. [PMID: 32245819 PMCID: PMC7304346 DOI: 10.4049/jimmunol.1901227] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 03/09/2020] [Indexed: 11/19/2022]
Abstract
The lung surfactant proteins are recognized as critical not only for their role in lowering lung surface tension but also in innate host defense. Reports have shown that some asthmatic patients have decreased levels of one member of this protein family in particular, surfactant protein-A (SP-A). Our studies set out to determine the contribution of SP-A to the response of a key effector cytokine in asthma, IL-13. Our studies employ both animal models sufficient and deficient in SP-A challenged with IL-13 and primary epithelial cells from participants with asthma that are exogenously treated with SP-A in the context of IL-13 challenge. The inflammatory response and mucin production were assessed in both model systems. As compared with WT mice, we show that the activity of IL-13 is dramatically augmented in SP-A-/- mice, which have significantly increased neutrophil and eosinophil recruitment, mucin production and asthma-associated cytokines in the bronchoalveolar lavage fluid. In parallel, we show asthma-associated factors are attenuated in human cells from asthma subjects when exogenous SP-A is added during IL-13 challenge. Although many of these phenotypes have previously been associated with STAT6 signaling, SP-A inhibited IL-13-induced STAT3 phosphorylation in mice and in human epithelial cells while having little effect on STAT6 phosphorylation. In addition, when either STAT3 or IL-6 were inhibited in mice, the phenotypes observed in SP-A-/- mice were significantly attenuated. These studies suggest a novel mechanism for SP-A in asthma as a modulator of IL-13-induced inflammation via mediating downstream IL-6/STAT3 signaling.
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Affiliation(s)
- Dave Francisco
- Department of Medicine, University of Arizona, Tucson, AZ 85719
- Asthma and Airway Disease Research Center, Tucson, AZ 85724
- Department of Medicine, Duke University, Durham, NC 27707
| | - Ying Wang
- Department of Medicine, University of Arizona, Tucson, AZ 85719
- Asthma and Airway Disease Research Center, Tucson, AZ 85724
- Department of Medicine, Duke University, Durham, NC 27707
| | - Michelle Conway
- Department of Medicine, University of Arizona, Tucson, AZ 85719
| | | | - Alane B C Dy
- Asthma and Airway Disease Research Center, Tucson, AZ 85724
| | - Kenneth J Addison
- Asthma and Airway Disease Research Center, Tucson, AZ 85724
- Department of Medicine, Duke University, Durham, NC 27707
| | - Hong W Chu
- Department of Medicine, National Jewish Health, Denver, CO 80206; and
| | - Dennis R Voelker
- Department of Medicine, National Jewish Health, Denver, CO 80206; and
| | - Julie G Ledford
- Asthma and Airway Disease Research Center, Tucson, AZ 85724;
- Department of Medicine, Duke University, Durham, NC 27707
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ 85719
| | - Monica Kraft
- Department of Medicine, University of Arizona, Tucson, AZ 85719;
- Asthma and Airway Disease Research Center, Tucson, AZ 85724
- Department of Medicine, Duke University, Durham, NC 27707
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Pocha K, Mock A, Rapp C, Dettling S, Warta R, Geisenberger C, Jungk C, Martins LR, Grabe N, Reuss D, Debus J, von Deimling A, Abdollahi A, Unterberg A, Herold-Mende CC. Surfactant Expression Defines an Inflamed Subtype of Lung Adenocarcinoma Brain Metastases that Correlates with Prolonged Survival. Clin Cancer Res 2020; 26:2231-2243. [PMID: 31953311 DOI: 10.1158/1078-0432.ccr-19-2184] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/09/2019] [Accepted: 01/14/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE To provide a better understanding of the interplay between the immune system and brain metastases to advance therapeutic options for this life-threatening disease. EXPERIMENTAL DESIGN Tumor-infiltrating lymphocytes (TIL) were quantified by semiautomated whole-slide analysis in brain metastases from 81 lung adenocarcinomas. Multi-color staining enabled phenotyping of TILs (CD3, CD8, and FOXP3) on a single-cell resolution. Molecular determinants of the extent of TILs in brain metastases were analyzed by transcriptomics in a subset of 63 patients. Findings in lung adenocarcinoma brain metastases were related to published multi-omic primary lung adenocarcinoma The Cancer Genome Atlas data (n = 230) and single-cell RNA-sequencing (scRNA-seq) data (n = 52,698). RESULTS TIL numbers within tumor islands was an independent prognostic marker in patients with lung adenocarcinoma brain metastases. Comparative transcriptomics revealed that expression of three surfactant metabolism-related genes (SFTPA1, SFTPB, and NAPSA) was closely associated with TIL numbers. Their expression was not only prognostic in brain metastasis but also in primary lung adenocarcinoma. Correlation with scRNA-seq data revealed that brain metastases with high expression of surfactant genes might originate from tumor cells resembling alveolar type 2 cells. Methylome-based estimation of immune cell fractions in primary lung adenocarcinoma confirmed a positive association between lymphocyte infiltration and surfactant expression. Tumors with a high surfactant expression displayed a transcriptomic profile of an inflammatory microenvironment. CONCLUSIONS The expression of surfactant metabolism-related genes (SFTPA1, SFTPB, and NAPSA) defines an inflamed subtype of lung adenocarcinoma brain metastases characterized by high abundance of TILs in close vicinity to tumor cells, a prolonged survival, and a tumor microenvironment which might be more accessible to immunotherapeutic approaches.
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Affiliation(s)
- Kolja Pocha
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Andreas Mock
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
- Department of Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg University Hospital, Heidelberg, Germany
- Department of Translational Medical Oncology, National Center for Tumor Diseases (NCT) Heidelberg, German Cancer Research Center (DKFZ), Heidelberg, Germany
- German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Carmen Rapp
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Steffen Dettling
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Rolf Warta
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
- German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Christoph Geisenberger
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Christine Jungk
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Leila R Martins
- Division of Applied Functional Genomics, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany
| | - Niels Grabe
- Hamamatsu Tissue Imaging and Analysis Center (TIGA), BIOQUANT, University of Heidelberg, Heidelberg, Germany
| | - David Reuss
- Department of Neuropathology, Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Juergen Debus
- German Cancer Consortium (DKTK), Heidelberg, Germany
- Department of Radiation Oncology, University of Heidelberg, Heidelberg, Germany
| | - Andreas von Deimling
- German Cancer Consortium (DKTK), Heidelberg, Germany
- Department of Neuropathology, Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Amir Abdollahi
- German Cancer Consortium (DKTK), Heidelberg, Germany
- Department of Radiation Oncology, University of Heidelberg, Heidelberg, Germany
| | - Andreas Unterberg
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Christel C Herold-Mende
- Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
- German Cancer Consortium (DKTK), Heidelberg, Germany
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18
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Moore C, Blumhagen RZ, Yang IV, Walts A, Powers J, Walker T, Bishop M, Russell P, Vestal B, Cardwell J, Markin CR, Mathai SK, Schwarz MI, Steele MP, Lee J, Brown KK, Loyd JE, Crapo JD, Silverman EK, Cho MH, James JA, Guthridge JM, Cogan JD, Kropski JA, Swigris JJ, Bair C, Kim DS, Ji W, Kim H, Song JW, Maier LA, Pacheco KA, Hirani N, Poon AS, Li F, Jenkins RG, Braybrooke R, Saini G, Maher TM, Molyneaux PL, Saunders P, Zhang Y, Gibson KF, Kass DJ, Rojas M, Sembrat J, Wolters PJ, Collard HR, Sundy JS, O’Riordan T, Strek ME, Noth I, Ma SF, Porteous MK, Kreider ME, Patel NB, Inoue Y, Hirose M, Arai T, Akagawa S, Eickelberg O, Fernandez IE, Behr J, Mogulkoc N, Corte TJ, Glaspole I, Tomassetti S, Ravaglia C, Poletti V, Crestani B, Borie R, Kannengiesser C, Parfrey H, Fiddler C, Rassl D, Molina-Molina M, Machahua C, Worboys AM, Gudmundsson G, Isaksson HJ, Lederer DJ, Podolanczuk AJ, Montesi SB, Bendstrup E, Danchel V, Selman M, Pardo A, Henry MT, Keane MP, Doran P, Vašáková M, Sterclova M, Ryerson CJ, Wilcox PG, Okamoto T, Furusawa H, Miyazaki Y, Laurent G, Baltic S, Prele C, Moodley Y, Shea BS, Ohta K, Suzukawa M, Narumoto O, Nathan SD, Venuto DC, Woldehanna ML, Kokturk N, de Andrade JA, Luckhardt T, Kulkarni T, Bonella F, Donnelly SC, McElroy A, Armstong ME, Aranda A, Carbone RG, Puppo F, Beckman KB, Nickerson DA, Fingerlin TE, Schwartz DA. Resequencing Study Confirms That Host Defense and Cell Senescence Gene Variants Contribute to the Risk of Idiopathic Pulmonary Fibrosis. Am J Respir Crit Care Med 2019; 200:199-208. [PMID: 31034279 PMCID: PMC6635791 DOI: 10.1164/rccm.201810-1891oc] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 04/22/2019] [Indexed: 12/20/2022] Open
Abstract
Rationale: Several common and rare genetic variants have been associated with idiopathic pulmonary fibrosis, a progressive fibrotic condition that is localized to the lung. Objectives: To develop an integrated understanding of the rare and common variants located in multiple loci that have been reported to contribute to the risk of disease. Methods: We performed deep targeted resequencing (3.69 Mb of DNA) in cases (n = 3,624) and control subjects (n = 4,442) across genes and regions previously associated with disease. We tested for associations between disease and 1) individual common variants via logistic regression and 2) groups of rare variants via sequence kernel association tests. Measurements and Main Results: Statistically significant common variant association signals occurred in all 10 of the regions chosen based on genome-wide association studies. The strongest risk variant is the MUC5B promoter variant rs35705950, with an odds ratio of 5.45 (95% confidence interval, 4.91-6.06) for one copy of the risk allele and 18.68 (95% confidence interval, 13.34-26.17) for two copies of the risk allele (P = 9.60 × 10-295). In addition to identifying for the first time that rare variation in FAM13A is associated with disease, we confirmed the role of rare variation in the TERT and RTEL1 gene regions in the risk of IPF, and found that the FAM13A and TERT regions have independent common and rare variant signals. Conclusions: A limited number of common and rare variants contribute to the risk of idiopathic pulmonary fibrosis in each of the resequencing regions, and these genetic variants focus on biological mechanisms of host defense and cell senescence.
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Affiliation(s)
- Camille Moore
- National Jewish Health, Denver, Colorado
- School of Public Health
| | | | | | | | | | | | | | | | | | | | - Cheryl R. Markin
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | | | | | | | - James E. Loyd
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James D. Crapo
- National Jewish Health, Denver, Colorado
- Department of Medicine, and
| | - Edwin K. Silverman
- Brigham and Women’s Hospital, Harvard School of Medicine, Boston, Massachusetts
| | - Michael H. Cho
- Brigham and Women’s Hospital, Harvard School of Medicine, Boston, Massachusetts
| | - Judith A. James
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | | | - Joy D. Cogan
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Jonathan A. Kropski
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - Carol Bair
- National Jewish Health, Denver, Colorado
| | - Dong Soon Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Wonjun Ji
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hocheol Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Woo Song
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Lisa A. Maier
- National Jewish Health, Denver, Colorado
- School of Public Health
- Department of Medicine, and
| | | | - Nikhil Hirani
- MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom
- Respiratory Medicine Unit, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Azin S. Poon
- Respiratory Medicine Unit, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Feng Li
- MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom
| | - R. Gisli Jenkins
- Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom
| | - Rebecca Braybrooke
- Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom
| | - Gauri Saini
- Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom
| | - Toby M. Maher
- Royal Brompton Hospital and Imperial College, London, United Kingdom
| | | | - Peter Saunders
- Royal Brompton Hospital and Imperial College, London, United Kingdom
| | - Yingze Zhang
- Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Kevin F. Gibson
- Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Daniel J. Kass
- Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Mauricio Rojas
- Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - John Sembrat
- Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Paul J. Wolters
- Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Harold R. Collard
- Department of Medicine, University of California, San Francisco, San Francisco, California
| | | | | | - Mary E. Strek
- Department of Medicine, University of Chicago, Chicago, Illinois
| | - Imre Noth
- Department of Medicine, University of Virginia, Charlottesville, Virginia
| | - Shwu-Fan Ma
- Department of Medicine, University of Virginia, Charlottesville, Virginia
| | - Mary K. Porteous
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Maryl E. Kreider
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Namrata B. Patel
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Yoshikazu Inoue
- National Hospital Organization Kinki-Chuo Chest Medical Center, Osaka, Japan
| | - Masaki Hirose
- National Hospital Organization Kinki-Chuo Chest Medical Center, Osaka, Japan
| | - Toru Arai
- National Hospital Organization Kinki-Chuo Chest Medical Center, Osaka, Japan
| | - Shinobu Akagawa
- National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Oliver Eickelberg
- Department of Medicine, and
- Helmholtz Zentrum München, Neuherberg, Germany
| | | | | | - Nesrin Mogulkoc
- Department of Pulmonology, Ege University Hospital, Bornova, Izmir, Turkey
| | - Tamera J. Corte
- Royal Prince Alfred Hospital and University of Sydney, Sydney, Australia
| | - Ian Glaspole
- Alfred Hospital and Monash University, Melbourne, Australia
| | | | - Claudia Ravaglia
- Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
| | - Venerino Poletti
- Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
| | - Bruno Crestani
- Université Paris Diderot and Hôpital Bichat, Paris, France
| | - Raphael Borie
- Université Paris Diderot and Hôpital Bichat, Paris, France
| | | | - Helen Parfrey
- Royal Papworth Hospital and Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Christine Fiddler
- Royal Papworth Hospital and Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Doris Rassl
- Royal Papworth Hospital and Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Maria Molina-Molina
- Respiratory Department, University Hospital of Bellvitge, University of Barcelona, Barcelona, Spain
| | - Carlos Machahua
- Respiratory Department, University Hospital of Bellvitge, University of Barcelona, Barcelona, Spain
| | - Ana Montes Worboys
- Respiratory Department, University Hospital of Bellvitge, University of Barcelona, Barcelona, Spain
| | - Gunnar Gudmundsson
- National University Hospital of Iceland, University of Iceland, Reykjavik, Iceland
| | - Helgi J. Isaksson
- National University Hospital of Iceland, University of Iceland, Reykjavik, Iceland
| | - David J. Lederer
- Department of Medicine, Columbia University Irving Medical Center, New York, New York
| | - Anna J. Podolanczuk
- Department of Medicine, Columbia University Irving Medical Center, New York, New York
| | - Sydney B. Montesi
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Elisabeth Bendstrup
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
| | - Vivi Danchel
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
| | - Moises Selman
- Instituto Nacional de Enfermedades Respiratorias “Ismael Cosio Villegas,” México City, México
| | - Annie Pardo
- Universidad Nacional Autónoma de México, México City, México
| | - Michael T. Henry
- Cork University Hospital and University College Cork, Cork, Ireland
| | - Michael P. Keane
- St. Vincent’s University Hospital, Dublin, Ireland
- School of Medicine, University College Dublin, Dublin, Ireland
| | - Peter Doran
- St. Vincent’s University Hospital, Dublin, Ireland
- School of Medicine, University College Dublin, Dublin, Ireland
| | - Martina Vašáková
- Department of Respiratory Medicine, First Faculty of Medicine Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Martina Sterclova
- Department of Respiratory Medicine, First Faculty of Medicine Charles University and Thomayer Hospital, Prague, Czech Republic
| | | | | | - Tsukasa Okamoto
- Department of Medicine, and
- Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Furusawa
- Department of Medicine, and
- Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Geoffrey Laurent
- Institute for Respiratory Health and
- Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, The University of Western Australia, Perth, Australia
| | | | - Cecilia Prele
- Institute for Respiratory Health and
- Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, The University of Western Australia, Perth, Australia
| | | | - Barry S. Shea
- Department of Medicine, Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - Ken Ohta
- National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Maho Suzukawa
- National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Osamu Narumoto
- National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Steven D. Nathan
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, Virginia
| | - Drew C. Venuto
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, Virginia
| | - Merte L. Woldehanna
- Advanced Lung Disease and Transplant Program, Inova Fairfax Hospital, Falls Church, Virginia
| | - Nurdan Kokturk
- Department of Pulmonary Medicine, Gazi University School of Medicine, Ankara, Turkey
| | - Joao A. de Andrade
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Tracy Luckhardt
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Tejaswini Kulkarni
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Francesco Bonella
- Ruhrlandklinik, University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Seamus C. Donnelly
- Department of Medicine, Tallaght University Hospital, Trinity College Dublin, Dublin, Ireland
| | - Aoife McElroy
- Department of Medicine, Tallaght University Hospital, Trinity College Dublin, Dublin, Ireland
| | - Michelle E. Armstong
- Department of Medicine, Tallaght University Hospital, Trinity College Dublin, Dublin, Ireland
| | - Alvaro Aranda
- CardioPulmonary Reserach Center, Alliance Pulmonary Group, Guaynabo, Puerto Rico
| | | | - Francesco Puppo
- Department of Internal Medicine, University of Genoa, Genoa, Italy
| | - Kenneth B. Beckman
- Biomedical Genomics Center, University of Minnesota; Minneapolis, Minnesota; and
| | | | - Tasha E. Fingerlin
- National Jewish Health, Denver, Colorado
- School of Public Health
- Department of Medicine, and
| | - David A. Schwartz
- National Jewish Health, Denver, Colorado
- Department of Medicine, and
- Department of Immunology, University of Colorado Denver, Denver, Colorado
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Abstract
PROPOSE We aimed to explore the potential molecular mechanism and independent prognostic genes for colon cancer (CC). METHODS Microarray datasets GSE17536 and GSE39582 were downloaded from Gene Expression Omnibus. Meanwhile, the whole CC-related dataset were downloaded from The Cancer Genome Atlas (TCGA) database. Differentially expressed mRNA (DEMs) were identified between cancer tissue samples and para-carcinoma tissue samples in TCGA dataset, followed by the KEGG pathway and GO function analyses. Furthermore, the clinical prognostic analysis including overall survival (OS) and disease-free survival (DFS) were performed in all three datasets. RESULTS A total of 633 up- and 321 down-regulated mRNAs were revealed in TCGA dataset. The up-regulated mRNAs were mainly assembled in functions including extracellular matrix and pathways including Wnt signaling. The down-regulated mRNAs were mainly assembled in functions like Digestion and pathways like Drug metabolism. Furthermore, up-regulation of UL16-binding protein 2 (ULBP2) was associated with OS in CC patients. A total of 12 DEMs including Surfactant Associated 2 (SFTA2) were potential DFS prognostic genes in CC patients. Meanwhile, the GRP and Transmembrane Protein 37 (TMEM37) were two outstanding independent DFS prognostic genes in CC. CONCLUSIONS ULBP2 might be a potential novel OS prognostic biomarker in CC, while GRP and TMEM37 could be served as the independent DFS prognostic genes in CC. Furthermore, functions including extracellular matrix and digestion, as well as pathways including Wnt signaling and drug metabolism might play important roles in the process of CC.
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Affiliation(s)
- Chunsheng Li
- Gastrointestinal Colorectal and Anal surgery, China-Japan Union Hospital of Jilin University, No. 126 Xiantai Street, Changchun, Jilin 130033 China
| | - Zhen Shen
- Gastrointestinal Colorectal and Anal surgery, China-Japan Union Hospital of Jilin University, No. 126 Xiantai Street, Changchun, Jilin 130033 China
| | - Yangyang Zhou
- Department of Neurology, The First Hospital of Jilin University, Changchun, Jilin 130021 China
| | - Wei Yu
- Gastrointestinal Colorectal and Anal surgery, China-Japan Union Hospital of Jilin University, No. 126 Xiantai Street, Changchun, Jilin 130033 China
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20
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Soo JY, Orgeig S, McGillick EV, Zhang S, McMillen IC, Morrison JL. Normalisation of surfactant protein -A and -B expression in the lungs of low birth weight lambs by 21 days old. PLoS One 2017; 12:e0181185. [PMID: 28949968 PMCID: PMC5614422 DOI: 10.1371/journal.pone.0181185] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 06/27/2017] [Indexed: 11/18/2022] Open
Abstract
Intrauterine growth restriction (IUGR) induced by placental restriction (PR) in the sheep negatively impacts lung and pulmonary surfactant development during fetal life. Using a sheep model of low birth weight (LBW), we found that there was an increase in mRNA expression of surfactant protein (SP)-A, -B and -C in the lung of LBW lambs but no difference in the protein expression of SP-A or -B. LBW also resulted in increased lysosome-associated membrane glycoprotein (LAMP)-3 mRNA expression, which may indicate an increase in either the density of type II Alveolar epithelial cells (AEC) or maturity of type II AECs. Although there was an increase in glucocorticoid receptor (GR) and 11β-hydroxysteroid dehydrogenase (11βHSD)-1 mRNA expression in the lung of LBW lambs, we found no change in the protein expression of these factors, suggesting that the increase in SP mRNA expression is not mediated by increased GC signalling in the lung. The increase in SP mRNA expression may, in part, be mediated by persistent alterations in hypoxia signalling as there was an increase in lung HIF-2α mRNA expression in the LBW lamb. The changes in the hypoxia signalling pathway that persist within the lung after birth may be involved in maintaining SP production in the LBW lamb.
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Affiliation(s)
- Jia Yin Soo
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
| | - Sandra Orgeig
- Molecular & Evolutionary Physiology of the Lung Laboratory, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
| | - Erin Victoria McGillick
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
- Molecular & Evolutionary Physiology of the Lung Laboratory, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
| | - Song Zhang
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
| | - I Caroline McMillen
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
| | - Janna L. Morrison
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
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21
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Tian S, Li C, Ran R, Chen SY. Surfactant protein A deficiency exacerbates renal interstitial fibrosis following obstructive injury in mice. Biochim Biophys Acta Mol Basis Dis 2016; 1863:509-517. [PMID: 27916681 DOI: 10.1016/j.bbadis.2016.11.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 11/20/2016] [Accepted: 11/30/2016] [Indexed: 11/20/2022]
Abstract
Renal interstitial fibrosis is an inevitable consequence of virtually every type of chronic kidney disease. The underlying mechanisms, however, are not completely understood. In the present study, we identified surfactant protein A (SP-A) as a novel protein factor involved in the renal fibrosis induced by unilateral ureter obstruction (UUO). UUO induced SP-A expression in mouse kidney epithelium, likely due to the increased acidic stress and inflammation. Interestingly, SP-A deficiency aggravated UUO-prompted kidney structural damage, macrophage accumulation, and tubulointerstitial fibrosis. SP-A deficiency appeared to worsen the fibrosis by enhancing interstitial myofibroblast accumulation. Moreover, SP-A deficiency increased the expression of TGF-β1, the major regulator of kidney fibrosis, particularly in the interstitial cells. Mechanistically, SP-A deficiency increased the expression and release of high mobility group box 1 (HMGB1), a factor regulating TGF-β expression/signaling and implicated in renal fibrosis. SP-A also blocked HMGB1 activities in inducing TGF-β1 expression and myofibroblast transdifferentiation from kidney fibroblasts, demonstrating that SP-A protected kidney by impeding both the expression and fibrogenic function of HMGB1. Since SP-A physically interacted with HMGB1 both in vitro and in kidney tissue in vivo, SP-A may exert its protective role by binding to HMGB1 and thus titrating its activity during UUO-induced renal fibrosis.
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Affiliation(s)
- Shaojiang Tian
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA, USA; Department of Nephrology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China.
| | - Chenxiao Li
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA, USA
| | - Ran Ran
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA, USA; Department of Nephrology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Shi-You Chen
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA, USA; Department of Nephrology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
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Tsitoura MEI, Stavrou EF, Maraziotis IA, Sarafidis K, Athanassiadou A, Dimitriou G. Surfactant Protein A and B Gene Polymorphisms and Risk of Respiratory Distress Syndrome in Late-Preterm Neonates. PLoS One 2016; 11:e0166516. [PMID: 27835691 PMCID: PMC5106092 DOI: 10.1371/journal.pone.0166516] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 03/05/2016] [Accepted: 10/31/2016] [Indexed: 11/19/2022] Open
Abstract
Background and Objectives Newborns delivered late-preterm (between 340/7 and 366/7 weeks of gestation) are at increased risk of respiratory distress syndrome (RDS). Polymorphisms within the surfactant protein (SP) A and B gene have been shown to predispose to RDS in preterm neonates. The aim of this study was to investigate whether specific SP-A and/or SP-B genetic variants are also associated with RDS in infants born late-preterm. Methods This prospective cross-sectional study included 56 late-preterm infants with and 60 without RDS. Specific SP-A1/SP-A2 haplotypes and SP-B Ile131Thr polymorphic alleles were determined in blood specimens using polymerase-chain-reaction and DNA sequencing. Results The SP-A1 6A4 and the SP-A2 1A5 haplotypes were significantly overrepresented in newborns with RDS compared to controls (OR 2.86, 95%CI 1.20–6.83 and OR 4.68, 95%CI 1.28–17.1, respectively). The distribution of the SP-B Ile131Thr genotypes was similar between the two late-preterm groups. Overall, the SP-A1 6A4 or/and SP-A2 1A5 haplotype was present in 20 newborns with RDS (35.7%), resulting in a 4.2-fold (1.60–11.0) higher probability of RDS in carriers. Multivariable regression analysis revealed that the effect of SP-A1 6A4 and SP-A2 1A5 haplotypes was preserved when adjusting for known risk or protective factors, such as male gender, smaller gestational age, smaller weight, complications of pregnancy, and administration of antenatal corticosteroids. Conclusions Specific SP-A genetic variants may influence the susceptibility to RDS in late-preterm infants, independently of the effect of other perinatal factors.
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Affiliation(s)
- Maria-Eleni I. Tsitoura
- Neonatal Intensive Care Unit, Department of Pediatrics, Faculty of Medicine, University of Patras, Rio, Patras, Greece
- Department of General Biology, Faculty of Medicine, University of Patras, Rio, Patras, Greece
| | - Eleana F. Stavrou
- Department of General Biology, Faculty of Medicine, University of Patras, Rio, Patras, Greece
| | - Ioannis A. Maraziotis
- Neonatal Intensive Care Unit, Department of Pediatrics, Faculty of Medicine, University of Patras, Rio, Patras, Greece
| | - Kosmas Sarafidis
- First Department of Neonatology, Aristotle University of Thessaloniki, Ippokration General Hospital, Thessaloniki, Greece
| | - Aglaia Athanassiadou
- Department of General Biology, Faculty of Medicine, University of Patras, Rio, Patras, Greece
| | - Gabriel Dimitriou
- Neonatal Intensive Care Unit, Department of Pediatrics, Faculty of Medicine, University of Patras, Rio, Patras, Greece
- * E-mail:
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Liu N, Xue L, Guan Y, Li QZ, Cao FY, Pang SL, Guan WJ. Expression of Peroxiredoxins and Pulmonary Surfactant Protein A Induced by Silica in Rat Lung Tissue. Biomed Environ Sci 2016; 29:584-588. [PMID: 27660222 DOI: 10.3967/bes2016.077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/27/2016] [Indexed: 06/06/2023]
Abstract
Silicosis is one of the most serious occupational diseases in China and dates back to centuries ago. In this study, we successfully established a rat model of silicosis by intratracheal silica injection for 28 days and determined hydroxyproline levels to evaluate collagen metabolism in lung homogenates. Oxidative stress status was evaluated by detecting catalase and glutathione peroxidase activities. Expression levels of peroxiredoxins (Prx I and Prx VI) were detected by Western blotting. Pulmonary surfactant protein A (SP-A) levels in rat serum and lung tissue were analyzed by ELISA, and SP-A and Prx expression levels in lung tissues were detected by immunohistochemistry. The results suggest that Prx proteins may be involved in pulmonary fibrosis induced by silica. Downregulation of SP-A expression caused due to silica is an important factor in the occurrence and development of silicosis.
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Affiliation(s)
- Nan Liu
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Ling Xue
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Yi Guan
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Qing Zhao Li
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Fu Yuan Cao
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Shu Lan Pang
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
| | - Wei Jun Guan
- School of Public Health, North China University of Science and Technology, Hebei province coal mine health and safety laboratory, Tangshan 063000, Hebei, China
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Zhang W, Cuperus T, van Dijk A, Skjødt K, Hansen S, Haagsman HP, Veldhuizen EJA. Developmental regulation of chicken surfactant protein A and its localization in lung. Dev Comp Immunol 2016; 61:80-87. [PMID: 26976230 DOI: 10.1016/j.dci.2016.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 03/10/2016] [Accepted: 03/10/2016] [Indexed: 06/05/2023]
Abstract
Surfactant Protein A (SP-A) is a collagenous C-type lectin (collectin) that plays an important role in the early stage of the host immune response. In chicken, SP-A (cSP-A) is expressed as a 26 kDa glycosylated protein in the lung. Using immunohistochemistry, cSP-A protein was detected mainly in the lung lining fluid covering the parabronchial epithelia. Specific cSP-A producing epithelial cells, resembling mammalian type II cells, were identified in the parabronchi. Gene expression of cSP-A markedly increased from embryonic day 14 onwards until the time of hatch, comparable to the SP-A homologue chicken lung lectin, while mannan binding lectin and collectins CL-L1 and CL-K1 only showed slightly changed expression during development. cSP-A protein could be detected as early as ED 18 in lung tissue using Western blotting, and expression increased steadily until day 28 post-hatch. Our observations are a first step towards understanding the role of this protein in vivo.
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Affiliation(s)
- Weidong Zhang
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Tryntsje Cuperus
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Albert van Dijk
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Karsten Skjødt
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, DK-5000, Odense, Denmark
| | - Søren Hansen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, DK-5000, Odense, Denmark
| | - Henk P Haagsman
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Edwin J A Veldhuizen
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
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Dudina KR, Kutateladze MM, Bokova NO, Znoiko OO, Abramov DD, Kelly EI, Yuschuk ND. [ASSOCIATION OF POLYMORPHISM GENES OF SURFACTANT PROTEINS IN PATIENTS WITH INFLUENZA]. Zh Mikrobiol Epidemiol Immunobiol 2015:71-77. [PMID: 26950992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM Evaluate role of gene polymorphisms of surfactant proteins in susceptibility and severity of influenza infection course in representatives of Moscow population. MATERIALS AND METHODS; 320 influenza patients, infected with various influenza virus strains, and 115 healthy individuals (control group),, were included into the study. Human DNA samples genotyping for determination of SFTPA2 gene rs1965708 and rs1059046, SFTPB gene rs1130866 polymorphisms was carried out using a modified method of "adjacent samples". RESULTS Most of the individuals of the control group and influenza patients are carries of alleles and genotypes rs1965708 and rs1059046 of SFTPA2 gene, rs1130866 of SFTPB gene, that have, based on scientific literature data, shown association with severe course of influenza A(H1N1) pdm09 and other inflammatory diseases of the respiratory tract. Generally, significant differences in frequency of occurrence of unfavorable genotypes CC rs1965708, AA rs1059046 of SFTPA2 gene and CC rs1130866 of SFTPB gene in influenza patients in comparison with individuals of the control group were not detected, that gives evidence on a high (from 19 to 51%) prevalence of these genotypes in the studied population. Allele C and genotype CC rs1965708 of SFTPA2 gene, allele A and genotype AA rs1059046 of SFTPA2 gene, allele C and genotype CC rs1130866 of SFTPB gene did not shown an association with severe course of A(H1N1) pdm09 influenza. The following pathology registered in most (88%) of the patients with severe course of influenza A (H1N1)pdm09: diseases of cardiovascilar (44%), endocrine (36%) and respiratory (12%) systems. CONCLUSION Because in most of the deceased patients due to severe course of A (H1N1)pdm09 influenza, diseases of cardiovascular, respiratory and endocrine system were detected, and an association of unfavorable disease outcome with the studied genetic markers was not detected, dominating risk factor of development of severe course and lethal outcome for A(H1N1)pdm09 influenza in the studied cohort was comorbidity.
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Yang W, Shen H, Fang G, Li H, Li L, Deng F, Gu W, Li K, Ma L, Gu J, Wang Y. Mutations of rat surfactant protein A have distinct effects on its glycosylation, secretion, aggregation and degradation. Life Sci 2014; 117:47-55. [PMID: 25242514 DOI: 10.1016/j.lfs.2014.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 07/09/2014] [Revised: 08/28/2014] [Accepted: 09/09/2014] [Indexed: 02/05/2023]
Abstract
AIMS Surfactant protein A (SP-A) plays critical roles in the innate immune system and surfactant homeostasis of the lung. Mutations in SP-A2 of the carbohydrate recognition domain (CRD) impair its glycosylation and are associated with pulmonary fibrosis in humans. We aim to examine how mutations in SP-A that impair its glycosylation affect its biological properties and lead to disease. MAIN METHODS We generated rat SP-A constructs with two types of mutations that impair its glycosylation: N-glycosylation site mutations (N21T, N207S and N21T/N207S) and disease-associated CRD mutations (G231V, F198S). We transfected these constructs into Chinese hamster ovary (CHO)-K1 cells and assessed biochemical differences in cellular and secreted wild-type and mutant SP-As by western blot, immunofluorescence, and sensitivity to enzymatic digestion. KEY FINDINGS Mutations of the CRD completely impaired SP-A secretion, whereas mutations of N-glycosylation sites had little effect. Both types of mutations formed nonidet p-40 (NP-40) insoluble aggregates, but the aggregates only from CRD mutations could be partially rescued by a chemical chaperone, 4-phenylbutyrate acid (4-PBA). The majority of CRD mutant SP-A was retained in the endoplasmic reticulum. Moreover, both types of mutations reduced SP-A stability, with CRD mutant SP-A being more sensitive to chymotrypsin digestion. Both types of soluble mutant SP-A could be degraded by the proteasome pathway, while insoluble aggregates could be additionally degraded by the lysosomal pathway. SIGNIFICANCE Our data provide evidence that the differential glycosylation of SP-A may play distinct roles in SP-A secretion, aggregation and degradation which may contribute to familial pulmonary fibrosis caused by SP-A2 mutations.
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Affiliation(s)
- Wenbing Yang
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Haitao Shen
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Guodong Fang
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Hui Li
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Lan Li
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Fang Deng
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Wei Gu
- Department of Pathophysiology, The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Kangsheng Li
- Department of Microbiology and Immunology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Lian Ma
- Department of Pediatrics, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong Province, China
| | - Jiang Gu
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Yongyu Wang
- Department of Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong Province, China.
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Cottin V. [Genetic pulmonary fibrosis]. Rev Prat 2014; 64:930-931. [PMID: 25362772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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28
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Liu H, Wang H, Shao Y, Huang B, Zhou X, Pan L, Wang G, Qi K. [Expression of chicken pulmonary surfactant protein A and preparation of its polyclonal antibody]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2014; 30:63-65. [PMID: 24405599] [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: 06/03/2023]
Abstract
OBJECTIVE To express chicken pulmonary surfactant protein A (cSP-A) in Escherichia coli and prepare polyclonal antibodies against the recombinant cSP-A. METHODS The carbohydrate recognition domain (CRD) gene of cSP-A (cSP-A-CRD) was artificially synthesized, subcloned into the prokaryotic expression vector pGEX-6P-1, and expressed in Escherichia coli BL21(DE3). After the expression products were identified by SDS-PAGE, the gel containing the target protein was cut and further purified. Mice were innoculated with the purified recombinant protein to prepare polyclonal antibodies against cSP-A. The antibody titer was determined by ELISA, and the specificity and application scope of the polyclonal antibodies were analyzed by Western blotting, immunohistochemical fluorescence assay and ELISA. RESULTS The serum against cSP-A was obtained and had an ELISA titer of 1×10(5);. The serum also showed excellent specificity and reactivity as demonstrated by the Western blotting. It could be used to detect the cSP-A in chicken lung epithelial cells by immunohistochemical fluorescence staining and could also be used to detect the hydrosoluble cSP-A in chicken bronchoalveolar lavage fluid by indirect ELISA. CONCLUSION The recombinant cSP-A was successfully expressed, and its mouse polyclonal antibodies were obtained.
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Affiliation(s)
- Hongmei Liu
- School of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
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Abstract
Surfactant protein A (SP-A), a pulmonary collectin, plays a role in lung innate immune host defense. In this study the role of SP-A in regulating the inflammatory response to the flagella of Pseudomonas aeruginosa (PA) was examined. Intra-tracheal infection of SP-A deficient (SP-A-/-) C57BL/6 mice with wild type flagellated PA (PAK) resulted in an increase in inflammatory cell recruitment and increase in pro-inflammatory cytokines IL-6 and TNF-α, which was not observed with a mutant pseudomonas lacking flagella (fliC). SP-A directly bound flagellin, via the N-linked carbohydrate moieties and collagen-like domain, in a concentration dependent manner and enhanced macrophage phagocytosis of flagellin and wild type PAK. IL-1β was reduced in the lungs of SP-A-/- mice following PAK infection. MH-s cells, a macrophage cell line, generated greater IL-1β when stimulated with flagellin and SP-A. Historically flagella stimulate IL-1β production through the toll-like receptor 5 (TLR-5) pathway and through a caspase-1 activating inflammasome pathway. IL-1β expression became non-detectable in SP-A and flagellin stimulated MH-s cells in which caspase-1 was silenced, suggesting SP-A induction of IL-1β appears to be occurring through the inflammasome pathway. SP-A plays an important role in the pathogenesis of PA infection in the lung by binding flagellin, enhancing its phagocytosis and modifying the macrophage inflammatory response.
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Affiliation(s)
- Anastasia K. Ketko
- Department of Pediatrics, Division of Neonatology, Division of Pediatric Critical Care Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Chinhong Lin
- Department of Pediatrics, Division of Neonatology, Division of Pediatric Critical Care Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Bethany B. Moore
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Ann Marie LeVine
- Department of Pediatrics, Division of Neonatology, Division of Pediatric Critical Care Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
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Hahn WH, Chang JY, Lee KS, Bae CW. Decreased expression of surfactant protein genes is associated with an increased expression of Forkhead box M1 gene in the fetal lung tissues of premature rabbits. Yonsei Med J 2013; 54:1422-9. [PMID: 24142647 PMCID: PMC3809867 DOI: 10.3349/ymj.2013.54.6.1422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Recently, Forkhead box M1 (FoxM1) was reported to be correlated with lung maturation and expression of surfactant proteins (SPs) in mice models. However, no study has been conducted in rabbit lungs despite their high homology with human lungs. Thus, we attempted to investigate serial changes in the expressions of FoxM1 and SP-A/B throughout lung maturation in rabbit fetuses. MATERIALS AND METHODS Pregnant New Zealand White rabbits were grouped according to gestational age from 5 days before to 2 days after the day of expected full term delivery (F5, F4, F3, F2, F1, F0, P1, and P2). A total of 64 fetuses were enrolled after Cesarean sections. The expressions of mRNA and proteins of FoxM1 and SP-A/B in fetal lung tissue were tested by quantitative reverse-transcriptase real-time PCR and Western blot. Furthermore, their correlations were analyzed. RESULTS The mRNA expression of SP-A/B showed an increasing tendency positively correlated with gestational age, while the expression of FoxM1 mRNA and protein decreased from F5 to F0. A significant negative correlation was found between the expression levels of FoxM1 and SP-A/B (SP-A: R=-0.517, p=0.001; SP-B: R=-0.615, p<0.001). CONCLUSION Preterm rabbits demonstrated high expression of FoxM1 mRNA and protein in the lungs compared to full term rabbits. Also, the expression of SP-A/B was inversely related with serial changes in FoxM1 expression. This is the first report to suggest an association between FoxM1 and expression of SP-A/B and lung maturation in preterm rabbits.
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Affiliation(s)
- Won-Ho Hahn
- Department of Pediatrics, Kyung Hee University Hospital at Gangdong, 892 Dongnam-ro, Gangdong-gu, Seoul 134-727, Korea.
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Chen H, Zhang JP, Huang H, Wang ZH, Cheng R, Cai WB. Leptin promotes fetal lung maturity and upregulates SP-A expression in pulmonary alveoli type-II epithelial cells involving TTF-1 activation. PLoS One 2013; 8:e69297. [PMID: 23894445 PMCID: PMC3718688 DOI: 10.1371/journal.pone.0069297] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 11/30/2012] [Accepted: 06/12/2013] [Indexed: 11/19/2022] Open
Abstract
The placental hormone leptin has important functions in fetal and neonatal growth, and prevents depressed respiration in leptin-deficient mice. The effect of leptin on respiratory distress suffered by low birth weight and premature infants has been studied. However, it is unclear how leptin enhances lung maturity in the fetus and ameliorates neonatal respiratory distress. In the present study, we found that antenatal treatment with leptin for 2 d significantly enhanced the relative alveolus area and improved the maturity of fetal lungs in a rat model of fetal growth restriction (FGR). Mean birth weight and lung wet weight were higher in the leptin-treated group than in the PBS-treated group, indicating promotion of fetal growth. Leptin upregulated the intracellular expression and extracellular secretion of surfactant protein (SP) A in type-II alveolar epithelial cells (AECs) in vivo and in vitro. Dual positive effects of leptin were found on protein expression and transcriptional activity of thyroid transcription factor-1 (TTF-1), a nuclear transcription essential for branching morphogenesis of the lung and expression of SP-A in type-II AECs. Knockdown of TTF-1 by RNA interference indicated that TTF-1 may play a vital role in leptin-induced SP-A expression. These results suggest that leptin may have great therapeutic potential for the treatment of FGR, and leptin-mediated SP-A induction and lung maturity of the fetus are TTF-1 dependent.
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Affiliation(s)
- Hui Chen
- Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen University, Guangzhou, China
| | - Jian-Ping Zhang
- Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen University, Guangzhou, China
| | - Hui Huang
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhen-Hua Wang
- Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
| | - Rui Cheng
- Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China
| | - Wei-Bin Cai
- Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China
- Center for Disease Model Animals, Sun Yat-sen University, Guangzhou, China
- * E-mail:
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Noutsios GT, Silveyra P, Bhatti F, Floros J. Exon B of human surfactant protein A2 mRNA, alone or within its surrounding sequences, interacts with 14-3-3; role of cis-elements and secondary structure. Am J Physiol Lung Cell Mol Physiol 2013; 304:L722-35. [PMID: 23525782 PMCID: PMC3680765 DOI: 10.1152/ajplung.00324.2012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 03/03/2013] [Indexed: 01/22/2023] Open
Abstract
Human surfactant protein A, an innate immunity molecule, is encoded by two genes: SFTPA1 (SP-A1) and SFTPA2 (SP-A2). The 5' untranslated (5'UTR) splice variant of SP-A2 (ABD), but not of SP-A1 (AD), contains exon B (eB), which is an enhancer for transcription and translation. We investigated whether eB contains cis-regulatory elements that bind trans-acting factors in a sequence-specific manner as well as the role of the eB mRNA secondary structure. Binding of cytoplasmic NCI-H441 proteins to wild-type eB, eB mutant, AD, and ABD 5'UTR mRNAs were studied by RNA electromobility shift assays (REMSAs). The bound proteins were identified by mass spectroscopy and specific antibodies (Abs). We found that 1) proteins bind eB mRNA in a sequence-specific manner, with two cis-elements identified within eB to be important; 2) eB secondary structure is necessary for binding; 3) mass spectroscopy and specific Abs in REMSAs identified 14-3-3 proteins to bind (directly or indirectly) eB and the natural SP-A2 (ABD) splice variant but not the SP-A1 (AD) splice variant; 4) other ribosomal and cytoskeletal proteins, and translation factors, are also present in the eB mRNA-protein complex; 5) knockdown of 14-3-3 β/α isoform resulted in a downregulation of SP-A2 expression. In conclusion, proteins including the 14-3-3 family bind two cis-elements within eB of hSP-A2 mRNA in a sequence- and secondary structure-specific manner. Differential regulation of SP-A1 and SP-A2 is mediated by the 14-3-3 protein family as well as by a number of other proteins that bind UTRs with or without eB mRNA.
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Affiliation(s)
- Georgios T Noutsios
- Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA
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Romaní-Pérez M, Outeiriño-Iglesias V, Gil-Lozano M, González-Matías LC, Mallo F, Vigo E. Pulmonary GLP-1 receptor increases at birth and exogenous GLP-1 receptor agonists augmented surfactant-protein levels in litters from normal and nitrofen-treated pregnant rats. Endocrinology 2013; 154:1144-55. [PMID: 23354098 DOI: 10.1210/en.2012-1786] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The glucagon-like peptide-1 receptor (GLP-1R) is found in a variety of tissues outside of the pancreas. For example, GLP-1R is expressed in the lung, where it has been implicated in the regulation of the lipid fraction of surfactants, suggesting it fulfills an important role in lung function. Here, we show that GLP-1R expression is strongly up-regulated immediately after birth in neonatal rats, particular in male offspring. Moreover, administering long half-life GLP-1R agonists to the mother from gestational day 14 to birth (exendin-4 or liraglutide) increased surfactant protein (SP)-A and SP-B mRNA expression and the amount of SPs in the amniotic fluid at the end of pregnancy. These effects were similar or more potent to those induced by the glucocorticoid dexamethasone, which also increased GLP-1R expression in fetuses just before delivery. Lir increased fetal SP-A and GLP-1R expression in control rats and in a nitrofen-induced model of lung hypoplasia. Moreover, lung size increased in controls after Lir administration, which also prevented the decrease in lung weight and the poor neonatal survival of the offspring from nitrofen-treated dams, effects that were not produced by dexamethasone. Taken together, our results demonstrate the importance of the GLP-1 system in regulating SP production and lung development.
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Affiliation(s)
- Marina Romaní-Pérez
- Endocrinology Laboratory, Biomedical Research Centre (Centro Investigaciones Biomédicas), University of Vigo, Campus As Lagoas-Marcosende, E-36310 Vigo, Spain
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Montalbano AP, Hawgood S, Mendelson CR. Mice deficient in surfactant protein A (SP-A) and SP-D or in TLR2 manifest delayed parturition and decreased expression of inflammatory and contractile genes. Endocrinology 2013; 154. [PMID: 23183169 PMCID: PMC3529364 DOI: 10.1210/en.2012-1797] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Previously we obtained compelling evidence that the fetus provides a critical signal for the initiation of term labor through developmental induction of surfactant protein (SP)-A expression by the fetal lung and secretion into amniotic fluid (AF). We proposed that interactions of AF macrophage (Mϕ) Toll-like receptors (TLRs) with SP-A, at term, or bacterial components, at preterm, result in their activation and migration to the pregnant uterus. Herein the timing of labor in wild-type (WT) C57BL/6 mice was compared with mice homozygous null for TLR2, SP-A, SP-D, or doubly deficient in SP-A and SP-D. Interestingly, TLR2(-/-) females manifested a significant (P < 0.001) delay in timing of labor compared with WT as well as reduced expression of the myometrial contraction-associated protein (CAP) gene, connexin-43, and Mϕ marker, F4/80, at 18.5 d postcoitum (dpc). Whereas in first pregnancies, SP-A(-/-), SP-D(-/-), and SP-A/D(-/-) females delivered at term (∼19.5 dpc), in second pregnancies, parturition was delayed by approximately 12 h in SP-A(-/-) (P = 0.07) and in SP-A/D(-/-) (P <0.001) females. Myometrium of SP-A/D(-/-) females expressed significantly lower levels of IL-1β, IL-6, and CAP genes, connexin-43, and oxytocin receptor at 18.5 dpc compared with WT. F4/80(+) AF Mϕs from TLR2(-/-) and SP-A/D(-/-) mice expressed significantly lower levels of both proinflammatory and antiinflammatory activation markers (e.g. IL-1β, IL-6, ARG1, YM1) compared with gestation-matched WT AF Mϕs. These novel findings suggest that the pulmonary collectins acting via TLR2 serve a modulatory role in the timing of labor; their relative impact may be dependent on parity.
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Affiliation(s)
- Alina P Montalbano
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
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Rausch F, Schicht M, Paulsen F, Ngueya I, Bräuer L, Brandt W. "SP-G", a putative new surfactant protein--tissue localization and 3D structure. PLoS One 2012; 7:e47789. [PMID: 23094088 PMCID: PMC3475697 DOI: 10.1371/journal.pone.0047789] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [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: 08/14/2012] [Accepted: 09/17/2012] [Indexed: 12/30/2022] Open
Abstract
Surfactant proteins (SP) are well known from human lung. These proteins assist the formation of a monolayer of surface-active phospholipids at the liquid-air interface of the alveolar lining, play a major role in lowering the surface tension of interfaces, and have functions in innate and adaptive immune defense. During recent years it became obvious that SPs are also part of other tissues and fluids such as tear fluid, gingiva, saliva, the nasolacrimal system, and kidney. Recently, a putative new surfactant protein (SFTA2 or SP-G) was identified, which has no sequence or structural identity to the already know surfactant proteins. In this work, computational chemistry and molecular-biological methods were combined to localize and characterize SP-G. With the help of a protein structure model, specific antibodies were obtained which allowed the detection of SP-G not only on mRNA but also on protein level. The localization of this protein in different human tissues, sequence based prediction tools for posttranslational modifications and molecular dynamic simulations reveal that SP-G has physicochemical properties similar to the already known surfactant proteins B and C. This includes also the possibility of interactions with lipid systems and with that, a potential surface-regulatory feature of SP-G. In conclusion, the results indicate SP-G as a new surfactant protein which represents an until now unknown surfactant protein class.
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Affiliation(s)
- Felix Rausch
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle, Germany
| | - Martin Schicht
- Institute of Anatomy, Department II, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Friedrich Paulsen
- Institute of Anatomy, Department II, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Ivan Ngueya
- Institute of Anatomy, Department II, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Lars Bräuer
- Institute of Anatomy, Department II, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle, Germany
- * E-mail:
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Mittal RA, Hammel M, Schwarz J, Heschl KM, Bretschneider N, Flemmer AW, Herber-Jonat S, Königshoff M, Eickelberg O, Holzinger A. SFTA2--a novel secretory peptide highly expressed in the lung--is modulated by lipopolysaccharide but not hyperoxia. PLoS One 2012; 7:e40011. [PMID: 22768197 PMCID: PMC3386909 DOI: 10.1371/journal.pone.0040011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [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: 09/16/2011] [Accepted: 06/05/2012] [Indexed: 11/19/2022] Open
Abstract
Tissue-specific transcripts are likely to be of importance for the corresponding organ. While attempting to define the specific transcriptome of the human lung, we identified the transcript of a yet uncharacterized protein, SFTA2. In silico analyses, biochemical methods, fluorescence imaging and animal challenge experiments were employed to characterize SFTA2. Human SFTA2 is located on Chr. 6p21.33, a disease-susceptibility locus for diffuse panbronchiolitis. RT-PCR verified the abundance of SFTA2-specific transcripts in human and mouse lung. SFTA2 is synthesized as a hydrophilic precursor releasing a 59 amino acid mature peptide after cleavage of an N-terminal secretory signal. SFTA2 has no recognizable homology to other proteins while orthologues are present in all mammals. SFTA2 is a glycosylated protein and specifically expressed in nonciliated bronchiolar epithelium and type II pneumocytes. In accordance with other hydrophilic surfactant proteins, SFTA2 did not colocalize with lamellar bodies but colocalized with golgin97 and clathrin-labelled vesicles, suggesting a classical secretory pathway for its expression and secretion. In the mouse lung, Sfta2 was significantly downregulated after induction of an inflammatory reaction by intratracheal lipopolysaccharides paralleling surfactant proteins B and C but not D. Hyperoxia, however, did not alter SFTA2 mRNA levels. We have characterized SFTA2 and present it as a novel unique secretory peptide highly expressed in the lung.
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Affiliation(s)
- Rashmi A. Mittal
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Markus Hammel
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Johannes Schwarz
- Comprehensive Pneumology Center, Institute of Experimental Pneumology, University Hospital, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
| | - Katharina M. Heschl
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | | | - Andreas W. Flemmer
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Susanne Herber-Jonat
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Melanie Königshoff
- Comprehensive Pneumology Center, Institute of Experimental Pneumology, University Hospital, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
| | - Oliver Eickelberg
- Comprehensive Pneumology Center, Institute of Experimental Pneumology, University Hospital, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
| | - Andreas Holzinger
- Neonatology, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
- * E-mail:
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Zhang X, Jiang J, Chen WJ, Su LX, Xie LX. Genetic characterization of a Chinese family with familial idiopathic pulmonary fibrosis. Chin Med J (Engl) 2012; 125:1945-1951. [PMID: 22884059] [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: 06/01/2023] Open
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) is a chronic inflammatory interstitial lung disease with an unknown cause. Recent studies have shown that genetic factors play an important role in the pathogenesis of IPF. METHODS To explore the genetic background of patients with IPF, a candidate gene approach was employed to screen for mutations in seven genes among members with familial IPF in mainland of China. RESULTS Within six of the candidate genes, a total of 31 point mutations were identified. Among the missense mutations, the SFTPA1 exon 6 CAG > AAG (Gln238Lys) and SFTPB exon 2 CAC > CCC (His2Pro) mutations caused changes in the physical and chemical properties of amino acids. Each sequence alteration was identified in sporadic IPF patients, control specimens (pneumonia patients and healthy persons). Genotype frequencies and allele frequencies of codon 238 in exon 6 of SFTPA1 were noted significantly higher in patients with IPF than those in other two control subjects. The computational protein structure prediction by protein homology modeling confirmed differences in three-dimensional structure between mutant SFTPA1 and original SFTPA1. CONCLUSIONS Although the functions of the mutant candidate genes vary, these genes may ultimately result in damage to alveolar epithelial cells, initiating the progress of pulmonary fibrosis. In particular, while pathophysiological mechanisms need to be illustrated, the Gln238Lys missense variant of exon 6 in the SFTPA1 may have potential susceptibility in the development of IPF, which was shown in patients with sporadic IPF with a statistically higher frequency.
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Affiliation(s)
- Xin Zhang
- Department of Respiratory Medicine, Hainan Branch of Chinese People's Liberation Army General Hospital, Sanya, Hainan 572000, China
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Zhang F, Zhong F, Li X, Wang X, Zhang K, Chen H, Li Z, Li W, Pan H, Han D. [Recombinant porcine lung surfactant protein A inhibits porcine reproductive and respiratory syndrome virus infection into host cells in vitro]. Wei Sheng Wu Xue Bao 2012; 52:654-660. [PMID: 22803352] [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
OBJECTIVE To investigate the antiviral activity of porcine lung surfactant protein A (SP-A) to porcine reproductive and respiratory syndrome virus (PRRSV) in vitro. METHODS The SP-A gene was amplified by PCR from the plasmid containing porcine SP-A gene, and subcloned into pcDNA3. 1A-CD5 vector containing the human CD5 signal peptide to generate SP-A eukaryotic expression vector pcDNA-CD5-SPA/MH. The recombinant expression vector was transfected into HEK293T cells mediated with calcium phosphate. The expressed recombinant SP-A was identified by Western blot and purified from culture medium by Ni-NTA-Agarose beads. The binding activity of SP-A with PRRSV was identified by ELISA. The antiviral activity of SP-A to PRRSV was analyzed by viral titer reduction assays on MARC-145 cells and porcine alveolar macrophages (PAM). RESULTS The results showed that the eukaryotic expression vector of SP-A gene could mediate SP-A expression in HEK293T cells, the expressed SP-A could bind PRRSV in a dose dependent manner. The PRRSV incubated in advance with SP-A showed the lower infective activity compared with no-SP-A-incubated PRRSV on both MARC-145 cells and porcine alveolar macrophages. The SP-A-treated PRRSV titers in MARC-145 cells and PAM cells were significantly lower than that of SP-A-untreated PRRSV at 72 h post-infection. CONCLUSION Recombinant porcine SP-A significantly inhibit the infection of PRRSV to the host cells in vitro, which indicates that recombinant SP-A possesses anti-PRRSV activity.
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Affiliation(s)
- Feng Zhang
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Agricultural University of Hebei, North China Research Center of Animal Epidemic Pathogen Biology, Ministry of Agriculture of China, Baoding 071001, China.
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Miyazato T, Ishikawa T, Michiue T, Maeda H. Molecular pathology of pulmonary surfactants and cytokines in drowning compared with other asphyxiation and fatal hypothermia. Int J Legal Med 2012; 126:581-7. [PMID: 22552475 DOI: 10.1007/s00414-012-0698-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 04/16/2012] [Indexed: 11/29/2022]
Affiliation(s)
- Takako Miyazato
- Department of Legal Medicine, Osaka City University Medical School, Asahi-machi 1-4-3, Abeno, Osaka, 545-8585, Japan
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Hsia BJ, Ledford JG, Potts-Kant EN, Nikam VS, Lugogo NL, Foster WM, Kraft M, Abraham SN, Wright JR. Mast cell TNF receptors regulate responses to Mycoplasma pneumoniae in surfactant protein A (SP-A)-/- mice. J Allergy Clin Immunol 2012; 130:205-14.e2. [PMID: 22502799 PMCID: PMC3578696 DOI: 10.1016/j.jaci.2012.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 02/21/2012] [Accepted: 03/01/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Mycoplasma pneumoniae (Mp) frequently colonizes the airways of patients with chronic asthma and likely contributes to asthma exacerbations. We previously reported that mice lacking surfactant protein A (SP-A) have increased airway hyperresponsiveness (AHR) during M pneumoniae infection versus wild-type mice mediated by TNF-α. Mast cells (MCs) have been implicated in AHR in asthma models and produce and respond to TNF-α. OBJECTIVE Determine the contribution of MC/TNF interactions to AHR in airways lacking functional SP-A during Mp infection. METHODS Bronchoalveolar lavage fluid was collected from healthy and asthmatic subjects to examine TNF-α levels and M pneumoniae positivity. To determine how SP-A interactions with MCs regulate airway homeostasis, we generated mice lacking both SP-A and MCs (SP-A(-/-)Kit(W-sh/W-sh)) and infected them with M pneumoniae. RESULTS Our findings indicate that high TNF-α levels correlate with M pneumoniae positivity in human asthmatic patients and that human SP-A inhibits M pneumoniae-stimulated transcription and release of TNF-α by MCs, implicating a protective role for SP-A. MC numbers increase in M pneumoniae-infected lungs, and airway reactivity is dramatically attenuated when MCs are absent. Using SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF receptor (TNF-R)(-/-) MCs, we found that TNF-α activation of MCs through the TNF-R, but not MC-derived TNF-α, leads to augmented AHR during M pneumoniae infection when SP-A is absent. Additionally, M pneumoniae-infected SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF-R(-/-) MCs have decreased mucus production compared with that seen in mice engrafted with wild-type MCs, whereas burden was unaffected. CONCLUSION Our data highlight a previously unappreciated but vital role for MCs as secondary responders to TNF-α during the host response to pathogen infection.
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Affiliation(s)
- Bethany J Hsia
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
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Song Y, Fang G, Shen H, Li H, Yang W, Pan B, Huang G, Lin G, Ma L, Willard B, Gu J, Zheng L, Wang Y. Human surfactant protein A2 gene mutations impair dimmer/trimer assembly leading to deficiency in protein sialylation and secretion. PLoS One 2012; 7:e46559. [PMID: 23056344 PMCID: PMC3463533 DOI: 10.1371/journal.pone.0046559] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 08/31/2012] [Indexed: 02/05/2023] Open
Abstract
Surfactant protein A2 (SP-A2) plays an essential role in surfactant metabolism and lung host defense. SP-A2 mutations in the carbohydrate recognition domain have been related to familial pulmonary fibrosis and can lead to a recombinant protein secretion deficiency in vitro. In this study, we explored the molecular mechanism of protein secretion deficiency and the subsequent biological effects in CHO-K1 cells expressing both wild-type and several different mutant forms of SP-A2. We demonstrate that the SP-A2 G231V and F198S mutants impair the formation of dimmer/trimer SP-A2 which contributes to the protein secretion defect. A deficiency in sialylation, but not N-linked glycosylation, is critical to the observed dimmer/trimer impairment-induced secretion defect. Furthermore, both mutant forms accumulate in the ER and form NP-40-insoluble aggregates. In addition, the soluble mutant SP-A2 could be partially degraded through the proteasome pathway but not the lysosome or autophagy pathway. Intriguingly, 4-phenylbutyrate acid (4-PBA), a chemical chaperone, alleviates aggregate formation and partially rescued the protein secretion of SP-A2 mutants. In conclusion, SP-A2 G231V and F198S mutants impair the dimmer/trimer assembly, which contributes to the protein sialylation and secretion deficiency. The intracellular protein mutants could be partially degraded through the proteasome pathway and also formed aggregates. The treatment of the cells with 4-PBA resulted in reduced aggregation and rescued the secretion of mutant SP-A2.
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Affiliation(s)
- Yi Song
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Guodong Fang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Haitao Shen
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Hui Li
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Wenbing Yang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Bing Pan
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences of Education Ministry, and Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Health Ministry, Beijing, People’s Republic of China
| | - Guowei Huang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Guangyu Lin
- Department of Pediatrics, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
- Translational Medicine Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Lian Ma
- Department of Pediatrics, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
- Translational Medicine Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Belinda Willard
- Proteomics Laboratory, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Jiang Gu
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - Lemin Zheng
- The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences of Education Ministry, and Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides of Health Ministry, Beijing, People’s Republic of China
- * E-mail: (YW); (LZ)
| | - Yongyu Wang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
- * E-mail: (YW); (LZ)
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Qiao LX, Yu ZB, Han SP, Gu XQ, Chen YL, Sha L, Jin JX, Yan LB, Guo XR. [Effects of maternal deficiency of folic acid during pregnancy on pulmonary development and SP-A expression in newborn rats]. Zhongguo Dang Dai Er Ke Za Zhi 2011; 13:573-576. [PMID: 21752326] [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: 05/31/2023]
Abstract
OBJECTIVE This study examined the effects of maternal deficiency of folic acid during pregnancy on pulmonary development and protein A (SP-A) expression in newborn rats in order to explore the possible mechanism of lung developmental disorders. METHODS Thirty-six adult Sprague-Dawley female rats were randomly assigned into two groups: control and study (n=18). The study and the control groups were fed with fodder containing folic acid or not respectively. Two weeks later, the female rats in the two groups copulated with normal male rats. Newborn rats were sacrificed at 1, 7 and 14 days after birth (8 pups at each time point). Lung sections were stained with hematoxylin and eosin for histological examination. SP-A expression of protein and mRNA were determined by immunohistochemistry and real-time quantitative RT-PCR, respectively. RESULTS The newborn rats from the study group showed damaged lung tissue structures. The mean optical density of type II cells with positive expression of SP-A decreased significantly from 1 to 14 days in newborn rats of the study group compared with the control newborn rats (P<0.05). The real-time quantitative RT-PCR showed that the expression of lung SP-A mRNA also decreased significantly from 1 to 14 days in newborn rats of the study group compared with control newborn rats (P<0.05). CONCLUSIONS Maternal deficiency of folic acid during pregnancy can decrease the expression of SP-A in lung tissues of newborn rats, which might lead to the disorder of lung development maturation.
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Affiliation(s)
- Li-Xing Qiao
- Department of Pediatrics, Nanjing Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Nanjing 210004, China
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van Eijk M, Bruinsma L, Hartshorn KL, White MR, Rynkiewicz MJ, Seaton BA, Hemrika W, Romijn RA, van Balkom BW, Haagsman HP. Introduction of N-linked glycans in the lectin domain of surfactant protein D: impact on interactions with influenza A viruses. J Biol Chem 2011; 286:20137-51. [PMID: 21489996 PMCID: PMC3121484 DOI: 10.1074/jbc.m111.224469] [Citation(s) in RCA: 20] [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: 01/25/2011] [Revised: 04/06/2011] [Indexed: 12/21/2022] Open
Abstract
Porcine surfactant protein D (pSP-D) displays distinctively strong, broad-range inhibitory activity against influenza A virus (IAV). N-Linked glycosylation of the carbohydrate recognition domain (CRD) of pSP-D contributes to the high affinity of this collectin for IAV. To investigate the role of the N-linked glycan further, HEK293E protein expression was used to produce recombinant pSP-D (RpSP-D) that has similar structural and antiviral properties as NpSP-D. We introduced an additional N-linked glycan in the CRD of RpSP-D but this modification did not alter the antiviral activity. Human SP-D is unglycosylated in its CRD and less active against IAV compared with pSP-D. In an attempt to modify its antiviral properties, several recombinant human SP-D (RhSP-D) mutants were constructed with N-linked glycans introduced at various locations within its CRD. To retain lectin activity, necessary for the primary interactions between SP-D and IAV, N-linked glycosylation of RhSP-D was shown to be restricted to the corresponding position in the CRD of either pSP-D or surfactant protein A (SP-A). These N-glycosylated RhSP-D mutants, however, did not show increased neutralization activity against IAV. By developing RhSP-D mutants that also have the pSP-D-specific Ser-Gly-Ala loop inserted in the CRD, we could demonstrate that the N-linked glycan-mediated interactions between pSP-D and IAV involves additional structural prerequisites of the pSP-D CRD. Ultimately, these studies will help to develop highly effective SP-D-based therapeutic and prophylactic drugs against IAV.
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Affiliation(s)
- Martin van Eijk
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht 3584CL, The Netherlands.
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Snegovskikh VV, Bhandari V, Wright JR, Tadesse S, Morgan T, Macneill C, Foyouzi N, Park JS, Wang Y, Norwitz ER. Surfactant protein-A (SP-A) selectively inhibits prostaglandin F2alpha (PGF2alpha) production in term decidua: implications for the onset of labor. J Clin Endocrinol Metab 2011; 96:E624-32. [PMID: 21270323 PMCID: PMC3070253 DOI: 10.1210/jc.2010-1496] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Labor is characterized by "decidual activation" with production of inflammatory mediators. Recent data suggest that surfactant protein-A (SP-A) may be critical to the onset of labor in mice. Whether this is also true in humans is unclear. OBJECTIVES The aim was to investigate: 1) the expression of SP-A at the maternal-fetal interface; 2) the effect of SP-A on the production of inflammatory mediators by human decidua; and 3) the association between single nucleotide polymorphisms in maternal SP-A genes and spontaneous preterm birth. RESEARCH DESIGN AND METHODS In situ expression of SP-A was investigated by immunohistochemistry and quantitative RT-PCR. Term decidual stromal cells were isolated, purified, and treated with/without SP-A (1-100 μg/ml), IL-1β, and/or thrombin. Levels of inflammatory mediators [IL-6, IL-8, TNFα, matrix metalloproteinase-3, monocyte chemotactic protein-1, IL-1β, PGE(2), prostaglandin F(2α) (PGF(2α))] and angiogenic factors (soluble fms-like tyrosine kinase-1, vascular endothelial growth factor) were measured in conditioned supernatant by ELISA and corrected for protein content. The effect of SP-A on eicosanoid gene expression was measured by quantitative RT-PCR. RESULTS SP-A localized to endometrium/decidua. High-dose SP-A (100 μg/ml) inhibited PGF(2α) by term decidual stromal cells without affecting the production of other inflammatory mediators, and this effect occurred at a posttranscriptional level. Decidual SP-A expression decreased significantly with labor. Single nucleotide polymorphisms in the SP-A genes do not appear to be associated with preterm birth. CONCLUSIONS SP-A is produced by human endometrium/decidua, where it significantly and selectively inhibits PGF(2α) production. Its expression decreases with labor. These novel observations suggest that decidual SP-A likely plays a critical role in regulating prostaglandin production within the uterus, culminating at term in decidual activation and the onset of labor.
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Affiliation(s)
- Victoria V Snegovskikh
- Departments of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, Connecticut 06520, USA
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García-Laorden MI, Rodríguez de Castro F, Solé-Violán J, Rajas O, Blanquer J, Borderías L, Aspa J, Briones ML, Saavedra P, Marcos-Ramos JA, González-Quevedo N, Sologuren I, Herrera-Ramos E, Ferrer JM, Rello J, Rodríguez-Gallego C. Influence of genetic variability at the surfactant proteins A and D in community-acquired pneumonia: a prospective, observational, genetic study. Crit Care 2011; 15:R57. [PMID: 21310059 PMCID: PMC3221990 DOI: 10.1186/cc10030] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [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: 09/21/2010] [Revised: 12/20/2010] [Accepted: 02/10/2011] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Genetic variability of the pulmonary surfactant proteins A and D may affect clearance of microorganisms and the extent of the inflammatory response. The genes of these collectins (SFTPA1, SFTPA2 and SFTPD) are located in a cluster at 10q21-24. The objective of this study was to evaluate the existence of linkage disequilibrium (LD) among these genes, and the association of variability at these genes with susceptibility and outcome of community-acquired pneumonia (CAP). We also studied the effect of genetic variability on SP-D serum levels. METHODS Seven non-synonymous polymorphisms of SFTPA1, SFTPA2 and SFTPD were analyzed. For susceptibility, 682 CAP patients and 769 controls were studied in a case-control study. Severity and outcome were evaluated in a prospective study. Haplotypes were inferred and LD was characterized. SP-D serum levels were measured in healthy controls. RESULTS The SFTPD aa11-C allele was significantly associated with lower SP-D serum levels, in a dose-dependent manner. We observed the existence of LD among the studied genes. Haplotypes SFTPA1 6A(2) (P = 0.0009, odds ration (OR) = 0.78), SFTPA(2) 1A(0) (P = 0.002, OR = 0.79), SFTPA1-SFTPA2 6A2-1A(0) (P = 0.0005, OR = 0.77), and SFTPD-SFTPA1-SFTPA(2)C-6A2-1A(0) (P = 0.00001, OR = 0.62) were underrepresented in patients, whereas haplotypes SFTPA2 1A(10) (P = 0.00007, OR = 6.58) and SFTPA1-SFTPA2 6A(3)-1A (P = 0.0007, OR = 3.92) were overrepresented. Similar results were observed in CAP due to pneumococcus, though no significant differences were now observed after Bonferroni corrections. 1A(10) and 6A-1A were associated with higher 28-day and 90-day mortality, and with multi-organ dysfunction syndrome (MODS) and acute respiratory distress syndrome (ARDS) respectively. SFTPD aa11-C allele was associated with development of MODS and ARDS. CONCLUSIONS Our study indicates that missense single nucleotide polymorphisms and haplotypes of SFTPA1, SFTPA2 and SFTPD are associated with susceptibility to CAP, and that several haplotypes also influence severity and outcome of CAP.
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Affiliation(s)
- M Isabel García-Laorden
- Department of Immunology, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - Felipe Rodríguez de Castro
- Department of Respiratory Diseases, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
- Department of Medical and Surgical Sciences, School of Medicine, University of Las Palmas de Gran Canaria, Avenida Marítima del Sur s/n, Las Palmas de Gran Canaria, 35016, Spain
| | - Jordi Solé-Violán
- Intensive Care Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - Olga Rajas
- Department of Respiratory Diseases, Hospital Universitario de la Princesa, Diego de León 62, Madrid, 28005, Spain
| | - José Blanquer
- Intensive Care Unit, Hospital Clínico y Universitario de Valencia, Avenida Blasco Ibáñez 17, Valencia, 46010, Spain
| | - Luis Borderías
- Department of Respiratory Diseases, Hospital San Jorge, Avenida Martínez de Velasco 36, Huesca, 22004, Spain
| | - Javier Aspa
- Department of Respiratory Diseases, Hospital Universitario de la Princesa, Diego de León 62, Madrid, 28005, Spain
| | - M Luisa Briones
- Department of Respiratory Diseases, Hospital Clínico y Universitario de Valencia, Avenida Blasco Ibáñez 17, Valencia, 46010, Spain
| | - Pedro Saavedra
- Department of Mathematics, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, Las Palmas de Gran Canaria, 35017, Spain
| | - J Alberto Marcos-Ramos
- Intensive Care Unit, Hospital Dr. José Molina Orosa, Carretera Arrecife-Tinajo km 1.300, Lanzarote, 35550, Spain
| | - Nereida González-Quevedo
- Department of Immunology, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - Ithaisa Sologuren
- Department of Immunology, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - Estefanía Herrera-Ramos
- Department of Immunology, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - José M Ferrer
- Intensive Care Unit, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
| | - Jordi Rello
- Hospital Vall D'Hebron - Universitat Autonoma de Barcelona. CIBERES. Institut de Recerca Vall d'Hebron (VHIR), Passeig de la Vall d'Hebron 119-129, Barcelona, 08035, Spain
| | - Carlos Rodríguez-Gallego
- Department of Immunology, Hospital Universitario de Gran Canaria Dr. Negrín, Barranco de la Ballena s/n, Las Palmas de Gran Canaria, 35010, Spain
- Department of Medical and Surgical Sciences, School of Medicine, University of Las Palmas de Gran Canaria, Avenida Marítima del Sur s/n, Las Palmas de Gran Canaria, 35016, Spain
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Xiao B, Xu J, Wang G, Jiang P, Fang F, Huang J, Wang J. Troglitazone-activated PPARγ inhibits LPS-induced lung alveolar type II epithelial cells injuries via TNF-α. Mol Biol Rep 2010; 38:5009-15. [PMID: 21153920 DOI: 10.1007/s11033-010-0647-4] [Citation(s) in RCA: 8] [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] [Received: 08/10/2010] [Accepted: 12/04/2010] [Indexed: 11/26/2022]
Abstract
Acute lung injury (ALI) or acute respiratory distress syndrome (ARDS) are common syndromes characterized by diffuse, acute injury to the alveolar epithelium and pulmonary vascular endothelial cells, with high mortality rate for there are no effective pharmacological therapies. Peroxisome proliferators-activated receptor γ (PPARγ), a member of the nuclear hormone receptor superfamily of ligand-activated transcription factors, is ubiquitously expressed within the lung. Recent studies have indicated PPARγ can protect lung tissue and alleviate pulmonary inflammatory injury. But no studies examined whether PPARγ agonists can protect the alveolar epithelial cells cultured in vitro. We observed the protective effect of PPARγ in LPS-induced alveolar type II epithelial cells injury. The results showed troglitazone-activated PPARγ could inhibit the production of TNF-α, one of the most important inflammatory factors, and then increased the expression of surfactant-associated protein A (SP-A) and attenuate the apoptosis of alveolar type II epithelial cells. Our results suggest that PPARγ may have a potential therapeutic effect on ALI.
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Affiliation(s)
- Bo Xiao
- Institute of Respiratory Diseases of the Second Affiliated Hospital (Xinqiao Hospital), Third Military Medical University, Xinqiao Street, Shapingba District, Chongqing, People's Republic of China
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Shirahama R, Miyazaki Y, Okamoto T, Inase N, Yoshizawa Y. Proteome analysis of bronchoalveolar lavage fluid in lung fibrosis associated with systemic sclerosis. Allergol Int 2010; 59:409-15. [PMID: 20962569 DOI: 10.2332/allergolint.10-oa-0176] [Citation(s) in RCA: 9] [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] [Received: 01/11/2010] [Accepted: 06/02/2010] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Interstitial lung disease (ILD) is the major cause of mortality in collagen vascular diseases. However, its pathogenesis still needs to be elucidated. METHODS To evaluate the alteration of certain proteins in bronchoalveolar lavage fluid (BALF) and clarify the causative role in the processes of ILD in systemic sclerosis (SSc), we compared a BALF protein profile between 5 patients with systemic sclerosis with pulmonary fibrosis (SSc-fib+) and 4 patients with systemic sclerosis without pulmonary fibrosis (SSc-fib-) using two-dimensional gel electrophoresis (2-DE), and matrix assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS). RESULTS We analyzed spots over the range of 10.1kDa to 207.4kDa. SSc-fib+ patients showed increased 3 proteins compared to SSc-fib- including α2-macroglobulin, α1-antitrypsin, and pulmonary surfactant protein A and decreased 2 proteins including α2 heat shock protein (HSP) and glutathione S-transferase (GST) compared to SSc-fib- patients. CONCLUSIONS In conclusion, we identified several interesting proteins that might have roles in ILD of SSc patients. Further studies are warranted to clarify the role of these proteins in the processes of pulmonary fibrosis in SSc.
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Affiliation(s)
- Ryutaro Shirahama
- Department of Integrated Pulmonology, Tokyo Medical and Dental University, Japan
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Yan XK, Zhang Y, Lin PY, Yu L, Chen C, Cui HF, Wang FC, Hong J. [Effect of acupuncture on SP-A expression in bronchoalveolar lavage fluid of asthmatic rats]. Zhongguo Zhen Jiu 2010; 30:665-668. [PMID: 20942285] [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: 05/30/2023]
Abstract
OBJECTIVE To explore the mechanism of acupuncture for treatment of asthma. METHODS Forty SD rats were randomly divided into 5 groups: blank control group, normal saline control group (NS control group), asthma model group, asthma model with acupuncture group (asthma acupuncture group) and asthma model with binding group (asthma binding group). The asthma acupuncture group was treated with acupuncture at "Dazhui" (GV 14), "Feishu" (BL 13) and "Fengmen" (BL 12); the asthma binding group was only binding without acupuncture and no intervention was given in the other groups. Surfactant protein-A (SP-A) expression was examined by Western-Blot. RESULTS Airway resistance in asthma model group was significantly higher than that in blank control group and NS control group from 3 to 6 min after asthma provocation (all P<0.01). Western-Blot detection showed that SP-A expression in bronchoalveolar lavage fluid (BALF) of the rats in asthma model group was significantly lower than that in blank control group and NS control group (both P<0.05), and which in asthma acupuncture group was significantly higher than that in asthma model group (P<0.05). CONCLUSION The mechanism of prevention and treatment of acupuncture for allergic asthma is related to regulating SP-A expression of airway in asthmatic rats.
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Affiliation(s)
- Xing-ke Yan
- Acupuncture and Massage College, Changchun University of TCM, Changchun 130117, China.
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Maitra M, Wang Y, Gerard RD, Mendelson CR, Garcia CK. Surfactant protein A2 mutations associated with pulmonary fibrosis lead to protein instability and endoplasmic reticulum stress. J Biol Chem 2010; 285:22103-13. [PMID: 20466729 PMCID: PMC2903395 DOI: 10.1074/jbc.m110.121467] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Revised: 05/11/2010] [Indexed: 12/25/2022] Open
Abstract
Rare heterozygous mutations in the gene encoding surfactant protein A2 (SP-A2, SFTPA2) are associated with adult-onset pulmonary fibrosis and adenocarcinoma of the lung. We have previously shown that two recombinant SP-A2 mutant proteins (G231V and F198S) remain within the endoplasmic reticulum (ER) of A549 cells and are not secreted into the culture medium. The pathogenic mechanism of the mutant proteins is unknown. Here we analyze all common and rare variants of the surfactant protein A2, SP-A2, in both A549 cells and in primary type II alveolar epithelial cells. We show that, in contrast with all other SP-A2 variants, the mutant proteins are not secreted into the medium with wild-type SP-A isoforms, form fewer intracellular dimer and trimer oligomers, are partially insoluble in 0.5% Nonidet P-40 lysates of transfected A549 cells, and demonstrate greater protein instability in chymotrypsin proteolytic digestions. Both the G231V and F198S mutant SP-A2 proteins are destroyed via the ER-association degradation pathway. Expression of the mutant proteins increases the transcription of a BiP-reporter construct, expression of BiP protein, and production of an ER stress-induced XBP-1 spliced product. Human bronchoalveolar wash samples from individuals who are heterozygous for the G231V mutation have similar levels of total SP-A as normal family members, which suggests that the mechanism of disease does not involve an overt lack of secreted SP-A but instead involves an increase in ER stress of resident type II alveolar epithelial cells.
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Affiliation(s)
- Meenakshi Maitra
- From the Eugene McDermott Center for Human Growth and Development and
| | - Yongyu Wang
- From the Eugene McDermott Center for Human Growth and Development and
| | | | - Carole R. Mendelson
- Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390
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Breuiller-Fouché M, Dubois O, Sediki M, Garcia-Verdugo I, Palaniyar N, Tanfin Z, Chissey A, Cabrol D, Charpigny G, Mehats C. Secreted surfactant protein A from fetal membranes induces stress fibers in cultured human myometrial cells. Am J Physiol Endocrinol Metab 2010; 298:E1188-97. [PMID: 20233942 DOI: 10.1152/ajpendo.00746.2009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, we investigated the ability of human fetal membranes (amnion and choriodecidua) to regulate human maternal uterine cell functions through the secretion of surfactant protein (SP)-A and SP-D at the end of pregnancy. We detected the expression of both SP-A (SP-A1 and SP-A2) and SP-D by quantitative reverse transcription polymerase chain reaction. Immunohistochemistry revealed that human fetal membranes expressed both SP-A and SP-D. By Western blot analysis, we demonstrated that SP-A protein expression was predominant in choriodecidua, whereas the amnion predominantly expressed SP-D. Only the secretion of SP-A was evidenced in the culture supernatants of amnion and choriodecidua explants by immunodot blot and confirmed by Western blot. Exogenous human purified SP-A induced stress fiber formation in cultured human myometrial cells via a pathway involving Rho-kinase. Conditioned medium from choriodecidua and amnion explants mimicked the SP-A effect. Treatment of myometrial cells with SP-A-depleted conditioned medium from choriodecidua or amnion explants failed to change the actin dynamic. These data indicate that SP-A released by human fetal membranes is able to exert a paracrine regulation of F-actin filament organization in myometrial cells.
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Affiliation(s)
- Michelle Breuiller-Fouché
- Institut National de la Santé et de la Recherche Médicale (INSERM), U767, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Paris V, Paris, France.
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