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Mestan KK, Sharma A, Lazar S, Pandey S, Parast MM, Laurent LC, Prince LS, Sahoo D. Macrophage Polarizations in the Placenta and Lung are Associated with Bronchopulmonary Dysplasia. bioRxiv 2024:2024.01.26.577443. [PMID: 38352616 PMCID: PMC10862768 DOI: 10.1101/2024.01.26.577443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The intricate interplay between macrophage polarization and placenta vascular dysfunction has garnered increasing attention in the context of placental inflammatory diseases. This study delves into the complex relationship between macrophage polarization within the placenta and its potential impact on the development of vascular dysfunction and inflammatory conditions. The placenta, a crucial organ in fetal development, relies on a finely tuned balance of immune responses for proper functioning. Disruptions in this delicate equilibrium can lead to pathological conditions, including inflammatory diseases affecting the fetus and newborn infant. We explored the interconnectedness between placental macrophage polarization and its relevance to lung macrophages, particularly in the context of early life lung development. Bronchopulmonary dysplasia (BPD), the most common chronic lung disease of prematurity, has been associated with abnormal immune responses, and understanding the role of macrophages in this context is pivotal. The investigation aims to shed light on how alterations in placental macrophage polarization may contribute to lung macrophage behavior and, consequently, influence the development of BPD. By unraveling the intricate mechanisms linking macrophage polarization, placental dysfunction and BPD, this research seeks to provide insights that could pave the way for targeted therapeutic interventions. The findings may offer novel perspectives on preventing and managing placental and lung-related pathologies, ultimately contributing to improved maternal and neonatal health outcomes.
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Affiliation(s)
- Karen K. Mestan
- Department of Pediatrics, University of California San Diego, La Jolla, CA
| | - Abhineet Sharma
- Department of Pediatrics, Divisions of Neonatology and Pediatric Pulmonology, University of Nebraska College of Medicine, Omaha, NE
| | - Sarah Lazar
- Department of Pediatrics, University of California San Diego, La Jolla, CA
| | - Sonalisa Pandey
- Department of Pediatrics, University of California San Diego, La Jolla, CA
| | - Mana M. Parast
- Department of Pathology, University of California San Diego, La Jolla, CA
| | - Louise C. Laurent
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Diego, La Jolla, CA
| | | | - Debashis Sahoo
- Department of Pediatrics, University of California San Diego, La Jolla, CA
- Department of Computer Science and Engineering, Jacob’s School of Engineering, University of California San Diego, La Jolla, CA
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2
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McCoy AM, Lakhdari O, Shome S, Caoili K, Hernandez GE, Aghaeepour N, Butcher LD, Fisch K, Prince LS. Sp3 is essential for normal lung morphogenesis and cell cycle progression during mouse embryonic development. Development 2023; 150:dev200839. [PMID: 36762637 PMCID: PMC10110423 DOI: 10.1242/dev.200839] [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: 04/08/2022] [Accepted: 01/18/2023] [Indexed: 02/11/2023]
Abstract
Members of the Sp family of transcription factors regulate gene expression via binding GC boxes within promoter regions. Unlike Sp1, which stimulates transcription, the closely related Sp3 can either repress or activate gene expression and is required for perinatal survival in mice. Here, we use RNA-seq and cellular phenotyping to show how Sp3 regulates murine fetal cell differentiation and proliferation. Homozygous Sp3-/- mice were smaller than wild-type and Sp+/- littermates, died soon after birth and had abnormal lung morphogenesis. RNA-seq of Sp3-/- fetal lung mesenchymal cells identified alterations in extracellular matrix production, developmental signaling pathways and myofibroblast/lipofibroblast differentiation. The lungs of Sp3-/- mice contained multiple structural defects, with abnormal endothelial cell morphology, lack of elastic fiber formation, and accumulation of lipid droplets within mesenchymal lipofibroblasts. Sp3-/- cells and mice also displayed cell cycle arrest, with accumulation in G0/G1 and reduced expression of numerous cell cycle regulators including Ccne1. These data detail the global impact of Sp3 on in vivo mouse gene expression and development.
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Affiliation(s)
- Alyssa M. McCoy
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Pharmacology, Meharry Medical College, Nashville, TN 37208, USA
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sayane Shome
- Department of Pediatrics, Stanford University, Palo Alto, CA 94304, USA
- Department of Anesthesiology, Perioperative and Pain Management, Stanford University, Palo Alto, CA 94305, USA
| | - Kaitlin Caoili
- Department of Pediatrics, Stanford University, Palo Alto, CA 94304, USA
| | - Gilberto E. Hernandez
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nima Aghaeepour
- Department of Pediatrics, Stanford University, Palo Alto, CA 94304, USA
- Department of Anesthesiology, Perioperative and Pain Management, Stanford University, Palo Alto, CA 94305, USA
| | | | - Kathleen Fisch
- Department of Obstetrics, Gynecology, and Reproductive Services, University of California, San Diego, La Jolla, CA 92093, USA
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA 92093, USA
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3
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De Francesco D, Reiss JD, Roger J, Tang AS, Chang AL, Becker M, Phongpreecha T, Espinosa C, Morin S, Berson E, Thuraiappah M, Le BL, Ravindra NG, Payrovnaziri SN, Mataraso S, Kim Y, Xue L, Rosenstein MG, Oskotsky T, Marić I, Gaudilliere B, Carvalho B, Bateman BT, Angst MS, Prince LS, Blumenfeld YJ, Benitz WE, Fuerch JH, Shaw GM, Sylvester KG, Stevenson DK, Sirota M, Aghaeepour N. Data-driven longitudinal characterization of neonatal health and morbidity. Sci Transl Med 2023; 15:eadc9854. [PMID: 36791208 PMCID: PMC10197092 DOI: 10.1126/scitranslmed.adc9854] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 01/11/2023] [Indexed: 02/17/2023]
Abstract
Although prematurity is the single largest cause of death in children under 5 years of age, the current definition of prematurity, based on gestational age, lacks the precision needed for guiding care decisions. Here, we propose a longitudinal risk assessment for adverse neonatal outcomes in newborns based on a deep learning model that uses electronic health records (EHRs) to predict a wide range of outcomes over a period starting shortly before conception and ending months after birth. By linking the EHRs of the Lucile Packard Children's Hospital and the Stanford Healthcare Adult Hospital, we developed a cohort of 22,104 mother-newborn dyads delivered between 2014 and 2018. Maternal and newborn EHRs were extracted and used to train a multi-input multitask deep learning model, featuring a long short-term memory neural network, to predict 24 different neonatal outcomes. An additional cohort of 10,250 mother-newborn dyads delivered at the same Stanford Hospitals from 2019 to September 2020 was used to validate the model. Areas under the receiver operating characteristic curve at delivery exceeded 0.9 for 10 of the 24 neonatal outcomes considered and were between 0.8 and 0.9 for 7 additional outcomes. Moreover, comprehensive association analysis identified multiple known associations between various maternal and neonatal features and specific neonatal outcomes. This study used linked EHRs from more than 30,000 mother-newborn dyads and would serve as a resource for the investigation and prediction of neonatal outcomes. An interactive website is available for independent investigators to leverage this unique dataset: https://maternal-child-health-associations.shinyapps.io/shiny_app/.
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Affiliation(s)
- Davide De Francesco
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Jonathan D. Reiss
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jacquelyn Roger
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Graduate Program in Biological and Medical Informatics, University of California, San Francisco, CA 94143, USA
| | - Alice S. Tang
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Graduate Program in Biological and Medical Informatics, University of California, San Francisco, CA 94143, USA
- Graduate Program in Bioengineering, University of California, San Francisco, CA 94158, USA
| | - Alan L. Chang
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Martin Becker
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Thanaphong Phongpreecha
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Camilo Espinosa
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Susanna Morin
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Graduate Program in Biological and Medical Informatics, University of California, San Francisco, CA 94143, USA
| | - Eloïse Berson
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Melan Thuraiappah
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Brian L. Le
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Department of Pediatrics, University of California, San Francisco, CA 94143, USA
| | - Neal G. Ravindra
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Seyedeh Neelufar Payrovnaziri
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Samson Mataraso
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Yeasul Kim
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Lei Xue
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Melissa G. Rosenstein
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, CA 94158, USA
| | - Tomiko Oskotsky
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Department of Pediatrics, University of California, San Francisco, CA 94143, USA
| | - Ivana Marić
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Brice Gaudilliere
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Brendan Carvalho
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Brian T. Bateman
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Martin S. Angst
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Lawrence S. Prince
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yair J. Blumenfeld
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - William E. Benitz
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Janene H. Fuerch
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gary M. Shaw
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karl G. Sylvester
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - David K. Stevenson
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Marina Sirota
- Bakar Computational Health Sciences Institute, University of California, San Francisco, CA 94143, USA
- Department of Pediatrics, University of California, San Francisco, CA 94143, USA
| | - Nima Aghaeepour
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
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4
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Ye C, Wu J, Reiss JD, Sinclair TJ, Stevenson DK, Shaw GM, Chace DH, Clark RH, Prince LS, Ling XB, Sylvester KG. Progressive Metabolic Abnormalities Associated with the Development of Neonatal Bronchopulmonary Dysplasia. Nutrients 2022; 14:nu14173547. [PMID: 36079804 PMCID: PMC9459725 DOI: 10.3390/nu14173547] [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: 08/02/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Objective: To assess the longitudinal metabolic patterns during the evolution of bronchopulmonary dysplasia (BPD) development. Methods: A case-control dataset of preterm infants (<32-week gestation) was obtained from a multicenter database, including 355 BPD cases and 395 controls. A total of 72 amino acid (AA) and acylcarnitine (AC) variables, along with infants’ calorie intake and growth outcomes, were measured on day of life 1, 7, 28, and 42. Logistic regression, clustering methods, and random forest statistical modeling were utilized to identify metabolic variables significantly associated with BPD development and to investigate their longitudinal patterns that are associated with BPD development. Results: A panel of 27 metabolic variables were observed to be longitudinally associated with BPD development. The involved metabolites increased from 1 predominant different AC by day 7 to 19 associated AA and AC compounds by day 28 and 16 metabolic features by day 42. Citrulline, alanine, glutamate, tyrosine, propionylcarnitine, free carnitine, acetylcarnitine, hydroxybutyrylcarnitine, and most median-chain ACs (C5:C10) were the most associated metabolites down-regulated in BPD babies over the early days of life, whereas phenylalanine, methionine, and hydroxypalmitoylcarnitine were observed to be up-regulated in BPD babies. Most calorie intake and growth outcomes revealed similar longitudinal patterns between BPD cases and controls over the first 6 weeks of life, after gestational adjustment. When combining with birth weight, the derived metabolic-based discriminative model observed some differences between those with and without BPD development, with c-statistics of 0.869 and 0.841 at day 7 and 28 of life on the test data. Conclusions: The metabolic panel we describe identified some metabolic differences in the blood associated with BPD pathogenesis. Further work is needed to determine whether these compounds could facilitate the monitoring and/or investigation of early-life metabolic status in the lung and other tissues for the prevention and management of BPD.
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Affiliation(s)
- Chengyin Ye
- Department of Health Management, School of Public Health, Hangzhou Normal University, Hangzhou 311100, China
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
| | - Jinghua Wu
- Department of Health Management, School of Public Health, Hangzhou Normal University, Hangzhou 311100, China
| | - Jonathan D. Reiss
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
- Stanford Metabolic Health Center, Stanford Children’s Hospital, Stanford, CA 94304, USA
| | - Tiffany J. Sinclair
- Department of Surgery, Division of Pediatric Surgery, Stanford University School of Medicine, Stanford, CA 94304, USA
| | - David K. Stevenson
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
- Stanford Metabolic Health Center, Stanford Children’s Hospital, Stanford, CA 94304, USA
| | - Gary M. Shaw
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
| | | | - Reese H. Clark
- Pediatrix-Obstetrix Center for Research, Education and Quality, Sunrise, FL 33323, USA
| | - Lawrence S. Prince
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
| | - Xuefeng Bruce Ling
- Department of Surgery, Division of Pediatric Surgery, Stanford University School of Medicine, Stanford, CA 94304, USA
- Clinical and Translational Research Program, Betty Irene Moore Children’s Heart Center, Lucile Packard Children’s Hospital, Palo Alto, CA 94304, USA
- Correspondence: (X.B.L.); (K.G.S.); Tel.: +1-650-723-6439 (K.G.S.); Fax: +1-650-725-5577 (K.G.S.)
| | - Karl G. Sylvester
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94304, USA
- Stanford Metabolic Health Center, Stanford Children’s Hospital, Stanford, CA 94304, USA
- Department of Surgery, Division of Pediatric Surgery, Stanford University School of Medicine, Stanford, CA 94304, USA
- Correspondence: (X.B.L.); (K.G.S.); Tel.: +1-650-723-6439 (K.G.S.); Fax: +1-650-725-5577 (K.G.S.)
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5
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Honda A, Hoeksema MA, Sakai M, Lund SJ, Lakhdari O, Butcher LD, Rambaldo TC, Sekiya NM, Nasamran CA, Fisch KM, Sajti E, Glass CK, Prince LS. The Lung Microenvironment Instructs Gene Transcription in Neonatal and Adult Alveolar Macrophages. J Immunol 2022; 208:1947-1959. [PMID: 35354612 PMCID: PMC9012679 DOI: 10.4049/jimmunol.2101192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/10/2022] [Indexed: 12/13/2022]
Abstract
Immaturity of alveolar macrophages (AMs) around birth contributes to the susceptibility of newborns to lung disease. However, the molecular features differentiating neonatal and mature, adult AMs are poorly understood. In this study, we identify the unique transcriptomes and enhancer landscapes of neonatal and adult AMs in mice. Although the core AM signature was similar, murine adult AMs expressed higher levels of genes involved in lipid metabolism, whereas neonatal AMs expressed a largely proinflammatory gene profile. Open enhancer regions identified by an assay for transposase-accessible chromatin followed by high-throughput sequencing (ATAC-seq) contained motifs for nuclear receptors, MITF, and STAT in adult AMs and AP-1 and NF-κB in neonatal AMs. Intranasal LPS activated a similar innate immune response in both neonatal and adult mice, with higher basal expression of inflammatory genes in neonates. The lung microenvironment drove many of the distinguishing gene expression and open chromatin characteristics of neonatal and adult AMs. Neonatal mouse AMs retained high expression of some proinflammatory genes, suggesting that the differences in neonatal AMs result from both inherent cell properties and environmental influences.
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Affiliation(s)
- Asami Honda
- Department of Pediatrics, University of California, San Diego, La Jolla, CA.,Rady Children's Hospital, San Diego, CA
| | - Marten A Hoeksema
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Mashito Sakai
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Sean J Lund
- Department of Pediatrics, University of California, San Diego, La Jolla, CA.,Rady Children's Hospital, San Diego, CA
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, La Jolla, CA.,Rady Children's Hospital, San Diego, CA
| | - Lindsay D Butcher
- Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA
| | | | | | - Chanond A Nasamran
- Center for Computational Biology and Bioinformatics, University of California, San Diego, La Jolla, CA
| | - Kathleen M Fisch
- Center for Computational Biology and Bioinformatics, University of California, San Diego, La Jolla, CA.,Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Diego, La Jolla, CA; and
| | - Eniko Sajti
- Department of Pediatrics, University of California, San Diego, La Jolla, CA.,Rady Children's Hospital, San Diego, CA
| | - Christopher K Glass
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA.,Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Lawrence S Prince
- Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA;
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6
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Taglauer ES, Fernandez-Gonzalez A, Willis GR, Reis M, Yeung V, Liu X, Prince LS, Mitsialis SA, Kourembanas S. Antenatal Mesenchymal Stromal Cell Extracellular Vesicle Therapy Prevents Preeclamptic Lung Injury in Mice. Am J Respir Cell Mol Biol 2021; 66:86-95. [PMID: 34614384 DOI: 10.1165/rcmb.2021-0307oc] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In preeclamptic pregnancies, a variety of intrauterine alterations lead to abnormal placentation, release of inflammatory/antiangiogenic factors, and subsequent fetal growth restriction with significant potential to cause a primary insult to the developing fetal lung. Thus, modulation of the maternal intrauterine environment may be a key therapeutic avenue to prevent preeclampsia-associated developmental lung injury. A biologic therapy of interest are mesenchymal stromal cell-derived extracellular vesicles (MEx), which we have previously shown to ameliorate preeclamptic physiology through intrauterine immunomodulation. To evaluate the therapeutic potential of MEx to improve developmental lung injury in experimental preeclampsia. Using the heme oxygenase-1 null mouse (Hmox1-/-) model, preeclamptic pregnant dams were administered intravenous antenatal MEx treatment during each week of pregnancy followed by analysis of fetal and postnatal lung tissues, amniotic fluid protein profiles and lung explant/amniotic fluid co-cultures in comparison with control and untreated preeclamptic pregnancies. We first identified that a preeclamptic intrauterine environment had a significant adverse impact on fetal lung development including alterations in fetal lung developmental gene profiles in addition to postnatal alveolar and bronchial changes. Amniotic fluid proteomic analysis and fetal lung explant/amniotic fluid co-cultures further demonstrated that maternally administered MEx altered the expression of multiple inflammatory mediators in the preeclamptic intrauterine compartment resulting in normalization of fetal lung branching morphogenesis and developmental gene expression. Our evaluation of fetal and postnatal parameters overall suggests that antenatal MEx treatment may provide a highly valuable preventative therapeutic modality for amelioration of lung development in preeclamptic disease.
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Affiliation(s)
- Elizabeth S Taglauer
- Harvard Medical School, 1811, Boston Children's Hospital, Boston, Massachusetts, United States
| | | | - Gareth R Willis
- Children's Hospital Boston, 1862, Boston, Massachusetts, United States
| | - Monica Reis
- Boston Children's Hospital, Department of Medicine, Division of Newborn Medicine, Boston, Massachusetts, United States.,Harvard Medical School, 1811, Department of Pediatrics, Boston, Massachusetts, United States
| | - Vincent Yeung
- Children's Hospital Boston, 1862, Boston, Massachusetts, United States.,Harvard Medical School, 1811, Boston, Massachusetts, United States
| | - Xianlan Liu
- Boston Children's Hospital, Division of Newborn Medicine, Boston, Massachusetts, United States
| | - Lawrence S Prince
- Stanford University School of Medicine, 10624, Pediatrics, Stanford, California, United States.,Lucile Salter Packard Children's Hospital at Stanford, 24349, Palo Alto, California, United States
| | - S Alex Mitsialis
- Boston Children's Hospital, 1862, Pediatrics, Boston, Massachusetts, United States.,Harvard Medical School, 1811, Pediatics, Boston, Massachusetts, United States
| | - Stella Kourembanas
- Harvard Medical School, 1811, Boston Children's Hospital, Boston, Massachusetts, United States;
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7
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Iklé JM, Prince LS, Maahs DM. 50 Years Ago in TheJournalofPediatrics: Neonatal Hypoglycemia: Progress and Predicaments. J Pediatr 2021; 235:82. [PMID: 34304767 DOI: 10.1016/j.jpeds.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
| | | | - David M Maahs
- Divisions of Pediatric Endocrinology, Stanford University School of Medicine, Stanford, California
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8
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Lund SJ, Patras KA, Kimmey JM, Yamamura A, Butcher LD, Del Rosario PGB, Hernandez GE, McCoy AM, Lakhdari O, Nizet V, Prince LS. Developmental Immaturity of Siglec Receptor Expression on Neonatal Alveolar Macrophages Predisposes to Severe Group B Streptococcal Infection. iScience 2020; 23:101207. [PMID: 32535023 PMCID: PMC7300150 DOI: 10.1016/j.isci.2020.101207] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 04/28/2020] [Accepted: 05/25/2020] [Indexed: 12/12/2022] Open
Abstract
Streptococcus agalactiae (Group B Streptococcus, GBS) is the most common neonatal pathogen. However, the cellular and molecular mechanisms for neonatal susceptibility to GBS pneumonia and sepsis are incompletely understood. Here we optimized a mouse model of GBS pneumonia to test the role of alveolar macrophage (ΑΜΦ) maturation in host vulnerability to disease. Compared with juvenile and adult mice, neonatal mice infected with GBS had increased mortality and persistence of lung injury. In addition, neonatal mice were defective in GBS phagocytosis and killing. ΑΜΦ depletion and disruption of ΑΜΦ differentiation in Csf2−/− mice both impaired GBS clearance. AMΦ engage the heavily sialylated GBS capsule via the cell surface Siglec receptors Sn and Siglec-E. Although both newborn and adult ΑΜΦ expressed Siglec-E, newborn ΑΜΦ expressed significantly lower levels of Sn. We propose that a developmental delay in Sn expression on ΑΜΦ may prevent effective killing and clearing of GBS from the newborn lung. Newborn mice fail to kill GBS, developing persistent lung injury Mature AMΦ detect the Sialic acid capsule on GBS to mediate bacterial clearance Immature newborn AMΦ lack mature Siglec expression required for killing GBS GBS engages the inhibitory Siglec-E on newborn AMΦ to suppress innate immunity
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Affiliation(s)
- Sean J Lund
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Kathryn A Patras
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Jacqueline M Kimmey
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Asami Yamamura
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Lindsay D Butcher
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Pamela G B Del Rosario
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Gilberto E Hernandez
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Alyssa M McCoy
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Victor Nizet
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, 9500 Gilman Drive, Mail Code 0760, La Jolla, CA 92093-0760, USA.
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9
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Sahoo D, Zaramela LS, Hernandez GE, Mai U, Taheri S, Dang D, Stouch AN, Medal RM, McCoy AM, Aschner JL, Blackwell TS, Zengler K, Prince LS. Transcriptional profiling of lung macrophages identifies a predictive signature for inflammatory lung disease in preterm infants. Commun Biol 2020; 3:259. [PMID: 32444859 PMCID: PMC7244484 DOI: 10.1038/s42003-020-0985-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 09/12/2019] [Accepted: 05/01/2020] [Indexed: 02/06/2023] Open
Abstract
Lung macrophages mature after birth, placing newborn infants, particularly those born preterm, within a unique window of susceptibility to disease. We hypothesized that in preterm infants, lung macrophage immaturity contributes to the development of bronchopulmonary dysplasia (BPD), the most common serious complication of prematurity. By measuring changes in lung macrophage gene expression in preterm patients at risk of BPD, we show here that patients eventually developing BPD had higher inflammatory mediator expression even on the first day of life. Surprisingly, the ex vivo response to LPS was similar across all samples. Our analysis did however uncover macrophage signature genes whose expression increased in the first week of life specifically in patients resilient to disease. We propose that these changes describe the dynamics of human lung macrophage differentiation. Our study therefore provides new mechanistic insight into both neonatal lung disease and human developmental immunology.
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Affiliation(s)
- Debashis Sahoo
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA, 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92037, USA
| | - Livia S Zaramela
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Gilberto E Hernandez
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Uyen Mai
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Sahar Taheri
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Dharanidhar Dang
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Ashley N Stouch
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Rachel M Medal
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Alyssa M McCoy
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Judy L Aschner
- Department of Pediatrics, Joseph M Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack Meridian School of Medicine at Seton Hall, Hackensack, NJ, 07110, USA
| | - Timothy S Blackwell
- Departments of Medicine, Cancer Biology, and Developmental Cell Biology, Vanderbilt University School of Medicine, Nashville, TN, 37232, USA
| | - Karsten Zengler
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Lawrence S Prince
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego, La Jolla, CA, 92093, USA.
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10
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Lund SJ, Patras KA, Kimmey JM, Yamamura A, Butcher LD, Del Rosario PGB, Hernandez GE, McCoy AM, Lakhdari O, Nizet V, Prince LS. Developmental immaturity of sialic acid recognition mediates neonatal susceptibility to GBS pneumonia. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.231.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Group B Streptococcus (GBS) is a major neonatal pathogen but rarely causes disease in adults. We previously showed in mice that GBS escapes killing in the neonatal lung via its heavily sialylated capsule. Immune cells detect sialic acid moieties via expression of a repertoire of Siglec receptors. Combinatory expression of proinflammatory and anti-inflammatory Siglec receptors allows differentiation between host and pathogenic microbial sialic acid modifications. We test here the hypothesis that neonatal alveolar macrophages (AMs) fail to detect and kill GBS due to developmental immaturity of Siglec receptor expression. Adult AMs express the proinflammatory sialic acid receptor Sialoadhesin (Sn, Siglec-1) and the anti-inflammatory receptors Siglec-E and Siglec-F. However, real time PCR, immunofluorescence, and FACS detected only Siglec-E in neonatal lung macrophage populations. Sn expression increased soon after birth and was restricted to AMs. The timing of increased Sn expression in newborn mice correlated with susceptibility to GBS. Mice infected with GBS on day 1 suffered early onset mortality, while mice infected on day 2 displayed late onset disease. Mice infected on day 3 survived GBS infection. Further implicating AM immaturity, Csf2−/− mice, which have defects in AM differentiation, lacked Sn expression and had reduced GBS clearance following infection. The presence of Siglec-E but absence of Sn in newborn AMs appeared to promote tolerance to GBS. Newborn SigE−/− mice had increased GBS phagocytosis and killing compared to WT controls. We therefore conclude that GBS exploits developmental immaturity of Siglec expression in AMs via its sialic acid capsule in causing neonatal disease.
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Affiliation(s)
| | | | - Jacqueline M Kimmey
- 1Department of Pediatrics, UCSD
- 2Department of Microbiology and Environmental Toxicology, UCSC
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11
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Yamamura A, Hoeksema MA, Sakai M, Lund SJ, Butcher LD, Lakhdari O, Oppong-Nonterah GO, Sajti E, Glass CK, Prince LS. Distinct Changes in the Chromatin Landscape Regulate Maturation of the Alveolar Macrophage Immune Response In Vivo. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.152.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Alveolar macrophages (AMs) perform specialized functions in the lung including protection against inhaled microbes and repair following injury. Neonates are particularly susceptible to lung infection and injury, suggesting immaturity of AM function. In mice, AMs differentiate from fetal myeloid precursors within the first week following birth. To measure the molecular and functional differences between neonatal and adult AMs, we performed RNA-seq and ATAC-seq on sorted AMs. Based on RNA-seq data, adult AMs expressed higher levels of genes associated with fatty acid metabolism (Fabp1 and Abcg1), while neonatal AMs expressed higher levels of proinflammatory genes (including Il1b, Il6, Tnf, and S100a8). Consistent with higher proinflammatory gene expression in neonatal AMs, ATAC-seq revealed enrichment of accessible AP1, NF-kB, and IRF binding motifs. In contrast, adult AMs contained open chromatin enriched in motifs for KLF, AR, and STAT. To test if these differences contributed to differential innate immune function, we treated both neonatal and adult mice in vivo with inhaled LPS. LPS-exposed AMs demonstrated robust innate immune responses in both neonatal and adult mice. Interestingly, many of the LPS-induced genes in neonatal AMs had higher basal levels of expression, suggesting constitutive innate immune activation in the neonatal lung. These differences appeared to be driven by the lung microenvironment, as isolating and culturing AMs resulted in rapid loss of differences in gene expression between neonatal and adult cells. Our data therefore suggest the developing environment of the neonatal lung drives unique molecular and functional differences in AM mediated innate immunity.
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Affiliation(s)
| | - Marten A. Hoeksema
- 2Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | - Mashito Sakai
- 2Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | | | | | | | | | | | - Christopher K. Glass
- 2Department of Cellular and Molecular Medicine, School of Medicine, UCSD
- 3Department of Medicine, UCSD
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12
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Dang D, Prince LS, Sahoo D. Computational approach to identifying universal macrophage biomarker. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.149.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Macrophages are a type of white blood cell, of the immune system, that engulfs and digests cellular debris, cancer cells, and anything else that does not have the type of proteins specific to healthy body cells on its surface. Understanding gene expression dynamics in macrophages are crucial for studying human diseases. Recent advances in high-throughput technologies have enabled the collection of immense amounts of biological data. A reliable marker of macrophage is essential to study their function. Traditional approaches use a number of markers that may have tissue specific expression patterns. To identify universal biomarker of macrophage, we used a previously published computational approach called BECC (Boolean Equivalent Correlated Clusters) that was originally used to identify universal cell cycle genes. We performed BECC analysis on a seed gene CD14, a known macrophage marker. FCER1G and TYROBP were among the top candidates which were validated as strong candidates for universal biomarkers for macrophages in human and mouse tissues. To our knowledge, such a finding is first of its kind.
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13
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Dang D, Taheri S, Das S, Ghosh P, Prince LS, Sahoo D. Computational Approach to Identifying Universal Macrophage Biomarkers. Front Physiol 2020; 11:275. [PMID: 32322218 PMCID: PMC7156600 DOI: 10.3389/fphys.2020.00275] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 03/10/2020] [Indexed: 12/11/2022] Open
Abstract
Macrophages engulf and digest microbes, cellular debris, and various disease-associated cells throughout the body. Understanding the dynamics of macrophage gene expression is crucial for studying human diseases. As both bulk RNAseq and single cell RNAseq datasets become more numerous and complex, identifying a universal and reliable marker of macrophage cell becomes paramount. Traditional approaches have relied upon tissue specific expression patterns. To identify universal biomarkers of macrophage, we used a previously published computational approach called BECC (Boolean Equivalent Correlated Clusters) that was originally used to identify conserved cell cycle genes. We performed BECC analysis using the known macrophage marker CD14 as a seed gene. The main idea behind BECC is that it uses massive database of public gene expression dataset to establish robust co-expression patterns identified using a combination of correlation, linear regression and Boolean equivalences. Our analysis identified and validated FCER1G and TYROBP as novel universal biomarkers for macrophages in human and mouse tissues.
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Affiliation(s)
- Dharanidhar Dang
- Department of Computer Science and Engineering, University of California, San Diego, San Diego, CA, United States.,Department of Pediatrics, University of California, San Diego, San Diego, CA, United States
| | - Sahar Taheri
- Department of Computer Science and Engineering, University of California, San Diego, San Diego, CA, United States
| | - Soumita Das
- Department of Pathology, University of California, San Diego, San Diego, CA, United States
| | - Pradipta Ghosh
- Departments of Medicine and Cellular and Molecular Medicine, University of California, San Diego, San Diego, CA, United States.,Moores Cancer Center, San Diego, CA, United States
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, San Diego, CA, United States.,Rady Children's Hospital, San Diego, CA, United States
| | - Debashis Sahoo
- Department of Computer Science and Engineering, University of California, San Diego, San Diego, CA, United States.,Department of Pediatrics, University of California, San Diego, San Diego, CA, United States.,Moores Cancer Center, San Diego, CA, United States
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14
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Sajti E, Link VM, Ouyang Z, Spann NJ, Westin E, Romanoski CE, Fonseca GJ, Prince LS, Glass CK. Transcriptomic and epigenetic mechanisms underlying myeloid diversity in the lung. Nat Immunol 2020; 21:221-231. [PMID: 31959980 PMCID: PMC7667722 DOI: 10.1038/s41590-019-0582-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 12/12/2019] [Indexed: 02/08/2023]
Abstract
The lung is inhabited by resident alveolar and interstitial macrophages as well as monocytic cells that survey lung tissues. Each cell type plays distinct functional roles under homeostatic and inflammatory conditions, but mechanisms establishing their molecular identities and functional potential remain poorly understood. In the present study, systematic evaluation of transcriptomes and open chromatin of alveolar macrophages (AMs), interstitial macrophages (IMs) and lung monocytes from two mouse strains enabled inference of common and cell-specific transcriptional regulators. We provide evidence that these factors drive selection of regulatory landscapes that specify distinct phenotypes of AMs and IMs and entrain qualitatively different responses to toll-like receptor 4 signaling in vivo. These studies reveal a striking divergence in a fundamental innate immune response pathway in AMs and establish a framework for further understanding macrophage diversity in the lung.
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Affiliation(s)
- Eniko Sajti
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, La Jolla, CA, USA.
| | - Verena M Link
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA.,Metaorganism Immunity Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Zhengyu Ouyang
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Nathanael J Spann
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Emma Westin
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Casey E Romanoski
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA.,Department of Cellular & Molecular Medicine, Bioscience Research Laboratories, University of Arizona, College of Medicine, Tucson, AZ, USA
| | - Gregory J Fonseca
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA.,Department of Medicine, Division of Quantitative Life Sciences, Meakins-Christie Laboratories, McGill University Health Centre, Montreal, Quebec, Canada
| | - Lawrence S Prince
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, La Jolla, CA, USA
| | - Christopher K Glass
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, USA
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15
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Lakhdari O, Yamamura A, Hernandez GE, Anderson KK, Lund SJ, Oppong-Nonterah GO, Hoffman HM, Prince LS. Differential Immune Activation in Fetal Macrophage Populations. Sci Rep 2019; 9:7677. [PMID: 31118442 PMCID: PMC6531440 DOI: 10.1038/s41598-019-44181-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 01/18/2019] [Accepted: 05/02/2019] [Indexed: 02/06/2023] Open
Abstract
Distinct macrophage subsets populate the developing embryo and fetus in distinct waves. However little is known about the functional differences between in utero macrophage populations or how they might contribute to fetal and neonatal immunity. Here we tested the innate immune response of mouse macrophages derived from the embryonic yolk sac and from fetal liver. When isolated from liver or lung, CD11bHI fetal liver derived macrophages responded to the TLR4 agonist LPS by expressing and releasing inflammatory cytokines. However F4/80HI macrophages from the yolk sac did not respond to LPS treatment. While differences in TLR4 expression did not appear to explain these data, F4/80HI macrophages had much lower NLRP3 inflammasome expression compared to CD11bHI macrophages. Gene expression profiling also demonstrated LPS-induced expression of inflammatory genes in CD11bHI macrophages, but not in F4/80HI cells. Genes expressed in LPS-treated CD11bHI macrophages were more likely to contain predicted NF-κB binding sites in their promoter regions. Our data show that CD11bHI macrophages derived from fetal liver are the major pro-inflammatory cells in the developing fetus. These findings could have important implications in better understanding the fetal inflammatory response and the unique features of neonatal immunity.
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Affiliation(s)
- Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Asami Yamamura
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Gilberto E Hernandez
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Kathryn K Anderson
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Sean J Lund
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Gertrude O Oppong-Nonterah
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Hal M Hoffman
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, Rady Children's Hospital, San Diego, San Diego, CA, USA.
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16
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Yamamura A, Lund SJ, Lakhdari O, Sakai M, Glass CK, Prince LS. Developmental and Environmental Regulation of Lung Macrophage Immune Response. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.187.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Neonates are uniquely susceptible to lung infection and injury. Alveolar (AM) and interstitial (IM) lung macrophages are the major cell populations protecting the lung against inhaled microbes and facilitating wound repair. AM and IM express unique cell surface markers and transcriptional profiles. We therefore hypothesized that neonatal and adult lung environments lead to differences in macrophage function. When lung macrophages were isolated by flow cytometry and stimulated with LPS in vitro for 2 h, neonatal AM expressed higher levels of Il1b and Il6 compared to adult AM. We next tested our hypothesis in vivo, challenging neonatal and adult mice with intranasal LPS. Contrary to our in vitro experiments, LPS induced higher cytokine expression in AM compared to IM. In addition, the adult AM response was higher than neonatal AM. To specifically test how the lung microenvironment regulated macrophage response, we stimulated neonatal and adult AM and IM with LPS either immediately after isolation or after 10–20 h of tissue culture. Consistent with our hypothesis, expression of key AM transcription factors fell quickly during cell culture. While neonatal AM and IM had similar LPS responses immediately after isolation, adult IM had higher cytokine expression compared to adult AM. Intriguingly, for both adults and neonates, longer culture time enhanced cytokine expression in activated AM while dampening the expression in IM. Our data suggest that the developmentally regulated lung microenvironment regulates the macrophage innate immune response.
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Affiliation(s)
| | | | | | - Mashito Sakai
- 2Department of Cellular and Molecular Medicine, UCSD
| | - Christopher K Glass
- 2Department of Cellular and Molecular Medicine, UCSD
- 3Department of Medicine, UCSD
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17
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Lund SJ, Patras KA, Yamamura A, Hernandez G, Lakhdari O, Nizet V, Prince LS. Alveolar macrophage maturation is required for efficient killing of GBS in the lung. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.190.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Group B Streptococcus (GBS) is the most common pathogen in neonates but rarely causes disease in adults. GBS causes pneumonia in newborns, suggesting a defect in lung innate immunity at birth. Using a novel neonatal mouse model of GBS pneumonia, we showed that newborn mice have reduced killing of GBS in the lung and more severe and persistent lung injury. Here we test the hypothesis that defects in alveolar macrophage (AM) maturation in newborns leads to GBS susceptibility. Clodronate depletion of AM from adult mice prevented GBS killing, supporting the requirement of AM for GBS protection. AM maturation and function requires GM-CSF, which is abundantly expressed in the lung. While AM maturation occurred on day 4 in WT mice, GM-CSF knockout mice (Csf2−/−) failed to develop AM. Consistent with the role of AM in GBS immunity, neonatal Csf2−/− mice had reduced GBS killing and lung macrophages failed to phagocytose GBS. Csf2−/− macrophages also had reduced expression of multiple Siglecs, cell surface receptors implicated in protection against encapsulated bacteria. Newborn lung macrophages expressed primarily Siglec-E (SigE), whereas expression of other Siglecs were only detected in more mature AM. We used SigE−/− mice to test its role in neonatal GBS pneumonia. GBS killing in SigE−/− neonates was similar to WT. However SigE−/− macrophages appeared to phagocytose GBS more efficiently in vivo, suggesting GBS may employ SigE to avoid detection by neonatal macrophages. Our data show that mature alveolar macrophages are required for protection against pulmonary GBS infection and potentially implicate the developmental regulation of macrophage Siglec expression in neonatal lung immunity.
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Affiliation(s)
- Sean J Lund
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
| | - Kathryn A Patras
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
| | - Asami Yamamura
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
| | | | - Omar Lakhdari
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
| | - Victor Nizet
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
- 3Glycobiology Research and Training Center, UCSD
| | - Lawrence S Prince
- 1University of California, San Diego
- 2Department of Pediatrics, UCSD
- 4Rady Children’s Hospital San Diego
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18
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Oppong-Nonterah GO, Lakhdari O, Yamamura A, Hoffman HM, Prince LS. TLR Activation Alters Bone Marrow-Derived Macrophage Differentiation. J Innate Immun 2018; 11:99-108. [PMID: 30408777 DOI: 10.1159/000494070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/11/2018] [Indexed: 12/24/2022] Open
Abstract
Early exposure to inflammatory signals may have a lasting impact on immune function. Present throughout embryogenesis, macrophages are key cells providing innate immune protection to the developing fetus and newborn. Here, we have used an established model of macrophage development to test how early inflammatory signals can impact cellular differentiation and function. Bone marrow-derived macrophages were treated with Escherichia coli lipopolysaccharide (LPS) 2 days after initial isolation and culture. LPS treatment during this early stage of differentiation decreased the expression of CSF1R and increased that of the mature macrophage marker F4/80. These early changes in macrophage differentiation were also measured in cells from mice lacking IKKβ, but the change in CSF1R expression after LPS treatment was blocked with MAPK inhibition. LPS-induced changes in macrophage marker expression persisted following LPS removal, suggesting that early inflammatory activation could induce a lasting developmental impact. Early LPS exposure inhibited macrophage phagocytosis of labeled E. coli while LPS had no effect on fully differentiated macrophages. Our data demonstrate that early inflammatory exposure to a microbial stimulus induce lasting phenotypic changes in macrophages.
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Affiliation(s)
- Gertrude O Oppong-Nonterah
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Omar Lakhdari
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Asami Yamamura
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Hal M Hoffman
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Lawrence S Prince
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA,
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19
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Abstract
Lung diseases impact patients across the lifespan, from infants in the first minutes of life through the aged population. Congenital abnormalities of lung structure can cause lung disease at birth or make adults more susceptible to chronic disease. Continuous inhalation of atmospheric components also requires the lung to be resilient to cellular injury. Fibroblast growth factor 10 (FGF10) regulates multiple stages of structural lung morphogenesis, cellular differentiation, and the response to injury. As a driver of lung airway branching morphogenesis, FGF10 signaling defects during development lead to neonatal lung disease. Alternatively, congenital airway abnormalities attributed to FGF10 mutations increase the risk of chronic airway disease in adulthood. FGF10 also maintains progenitor cell populations in the airway and promotes alveolar type 2 cell expansion and differentiation following injury. Here we review the cellular and molecular mechanisms linking FGF10 to multiple lung diseases, from bronchopulmonary dysplasia in extremely preterm neonates, cystic fibrosis in children, and chronic adult lung disorders. Understanding the connections between FGF10 and lung diseases may lead to exciting new therapeutic strategies.
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Affiliation(s)
- Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, Rady Children's Hospital, San Diego, CA, United States
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20
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Lund SJ, Patras KA, Kimmey JM, Yamamura A, Hernandez G, Lakhdari O, McCoy AM, Nizet V, Prince LS. Polysaccharide capsule allows Group B Streptococcus to avoid killing in a newborn pneumonia model. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.117.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Abstract
Group B Streptococcus (Streptococcus agalactiae, GBS) causes severe infections in neonates. While not a common adult pathogen, GBS is the leading cause of congenital pneumonia. To determine the molecular mechanisms of neonatal susceptibility, we developed a murine GBS pneumonia model. Neonatal, juvenile, and adult C57BL/6 mice were inoculated intranasally with 2800 CFU/g of GBS (COH1). After 7 d, survival was 100 % in adults and juveniles, with 10 % of neonates dying within 3 d after infection. Histopathological assessments showed severe lung injury scores 24 h after infection, with adult and juvenile mice demonstrating resolution of injury at 3 d post infection and normal histology after 7 d. In contrast, neonatal lungs had persistent lung injury up to 7 d post infection. By FACS, GBS induced rapid neutrophil recruitment into adult lungs and increased CD11b expression on adult lung macrophages. In neonatal lungs, GBS neither increased neutrophil numbers nor altered macrophage marker expression. Confocal imaging showed GBS in adult lungs almost entirely localized to alveolar macrophage phagolysosomes. However in neonatal lungs, GBS was only rarely phagocytosed by macrophages. These data were consistent with GBS killing data, which showed complete GBS killing within 24 h in adult and juvenile mice, but persistent GBS viability within the lung for up to 3 d in neonates. Defective GBS killing in neonates appeared to require the GBS capsule. Neonatal mice were much more efficient in killing the ΔcpsD capsule mutant compared to wild type GBS. Adult mice showed equal killing of ΔcpsD or wild type GBS. Our data suggest that the GBS capsule prevents killing by the newborn lung innate immune system, leading to neonatal disease susceptibility.
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Affiliation(s)
- Sean J. Lund
- 1UCSD
- 2Department of Pediatrics, University of California San Diego
| | - Kathryn A. Patras
- 3Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California San Diego
| | - Jacqueline M. Kimmey
- 3Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California San Diego
| | - Asami Yamamura
- 2Department of Pediatrics, University of California San Diego
| | | | - Omar Lakhdari
- 2Department of Pediatrics, University of California San Diego
| | - Alyssa M. McCoy
- 2Department of Pediatrics, University of California San Diego
| | - Victor Nizet
- 3Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California San Diego
- 4Glycobiology Research and Training Center, University of California San Diego
- 5Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego
| | - Lawrence S. Prince
- 2Department of Pediatrics, University of California San Diego
- 6Rady Children’s Hospital San Diego, San Diego
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McCoy AM, Herington JL, Stouch AN, Mukherjee AB, Lakhdari O, Blackwell TS, Prince LS. IKKβ Activation in the Fetal Lung Mesenchyme Alters Lung Vascular Development but Not Airway Morphogenesis. Am J Pathol 2017; 187:2635-2644. [PMID: 28923684 DOI: 10.1016/j.ajpath.2017.08.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/05/2017] [Accepted: 08/08/2017] [Indexed: 01/29/2023]
Abstract
In the immature lung, inflammation and injury disrupt the epithelial-mesenchymal interactions required for normal development. Innate immune signaling and NF-κB activation disrupt the normal expression of multiple mesenchymal genes that play a key role in airway branching and alveolar formation. To test the role of the NF-κB pathway specifically in lung mesenchyme, we utilized the mesenchymal Twist2-Cre to drive expression of a constitutively active inhibitor of NF-κB kinase subunit β (IKKβca) mutant in developing mice. Embryonic Twist2-IKKβca mice were generated in expected numbers and appeared grossly normal. Airway branching also appeared normal in Twist2-IKKβca embryos, with airway morphometry, elastin staining, and saccular branching similar to those in control littermates. While Twist2-IKKβca lungs did not contain increased levels of Il1b, we did measure an increased expression of the chemokine-encoding gene Ccl2. Twist2-IKKβca lungs had increased staining for the vascular marker platelet endothelial cell adhesion molecule 1. In addition, type I alveolar epithelial differentiation appeared to be diminished in Twist2-IKKβca lungs. The normal airway branching and lack of Il1b expression may have been due to the inability of the Twist2-IKKβca transgene to induce inflammasome activity. While Twist2-IKKβca lungs had an increased number of macrophages, inflammasome expression remained restricted to macrophages without evidence of spontaneous inflammasome activity. These results emphasize the importance of cellular niche in considering how inflammatory signaling influences fetal lung development.
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Affiliation(s)
- Alyssa M McCoy
- Department of Pediatrics, University of California, San Diego, La Jolla, California; Rady Children's Hospital, San Diego, San Diego, California; Department of Neuroscience and Pharmacology, Meharry Medical College, Nashville, Tennessee
| | - Jennifer L Herington
- Departments of Pediatrics, Medicine, Cancer Biology, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Ashley N Stouch
- Department of Pediatrics, University of California, San Diego, La Jolla, California; Rady Children's Hospital, San Diego, San Diego, California; Departments of Pediatrics, Medicine, Cancer Biology, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Anamika B Mukherjee
- Departments of Pediatrics, Medicine, Cancer Biology, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, La Jolla, California; Rady Children's Hospital, San Diego, San Diego, California
| | - Timothy S Blackwell
- Departments of Pediatrics, Medicine, Cancer Biology, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, La Jolla, California; Rady Children's Hospital, San Diego, San Diego, California.
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22
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Medal RM, Im AM, Yamamoto Y, Lakhdari O, Blackwell TS, Hoffman HM, Sahoo D, Prince LS. The innate immune response in fetal lung mesenchymal cells targets VEGFR2 expression and activity. Am J Physiol Lung Cell Mol Physiol 2017; 312:L861-L872. [PMID: 28336813 PMCID: PMC5495951 DOI: 10.1152/ajplung.00554.2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 02/06/2023] Open
Abstract
In preterm infants, soluble inflammatory mediators target lung mesenchymal cells, disrupting airway and alveolar morphogenesis. However, how mesenchymal cells respond directly to microbial stimuli remains poorly characterized. Our objective was to measure the genome-wide innate immune response in fetal lung mesenchymal cells exposed to the bacterial endotoxin lipopolysaccharide (LPS). With the use of Affymetrix MoGene 1.0st arrays, we showed that LPS induced expression of unique innate immune transcripts heavily weighted toward CC and CXC family chemokines. The transcriptional response was different between cells from E11, E15, and E18 mouse lungs. In all cells tested, LPS inhibited expression of a small core group of genes including the VEGF receptor Vegfr2 Although best characterized in vascular endothelial populations, we demonstrated here that fetal mouse lung mesenchymal cells express Vegfr2 and respond to VEGF-A stimulation. In mesenchymal cells, VEGF-A increased cell migration, activated the ERK/AKT pathway, and promoted FOXO3A nuclear exclusion. With the use of an experimental coculture model of epithelial-mesenchymal interactions, we also showed that VEGFR2 inhibition prevented formation of three-dimensional structures. Both LPS and tyrosine kinase inhibition reduced three-dimensional structure formation. Our data suggest a novel mechanism for inflammation-mediated defects in lung development involving reduced VEGF signaling in lung mesenchyme.
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Affiliation(s)
- Rachel M Medal
- Department of Pediatrics, University of California, San Diego, and Rady Children's Hospital, San Diego, California; and
| | - Amanda M Im
- Departments of Pediatrics, Medicine, Developmental and Cell Biology, and Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Yasutoshi Yamamoto
- Departments of Pediatrics, Medicine, Developmental and Cell Biology, and Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, and Rady Children's Hospital, San Diego, California; and
| | - Timothy S Blackwell
- Departments of Pediatrics, Medicine, Developmental and Cell Biology, and Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Hal M Hoffman
- Department of Pediatrics, University of California, San Diego, and Rady Children's Hospital, San Diego, California; and
| | - Debashis Sahoo
- Department of Pediatrics, University of California, San Diego, and Rady Children's Hospital, San Diego, California; and
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, and Rady Children's Hospital, San Diego, California; and
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Lakhdari O, McAllister CS, Wang M, Minev I, Prince LS, Eckmann L, Kagnoff MF. TLR3 signaling is downregulated by a MAVS isoform in epithelial cells. Cell Immunol 2016; 310:205-210. [PMID: 27593154 DOI: 10.1016/j.cellimm.2016.08.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 12/22/2022]
Abstract
Innate immune responses to dsRNA result in signaling through the TLR3 pathway and/or the RIG-I/MDA-5/MAVS pathway which can activate type I IFN, proinflammatory cytokines and apoptosis. It is not clear whether MAVS could play a role in TLR3-dependent responses to extracellular dsRNA. Using a model of epithelial cells that express a functional TLR3 signaling pathway, we found that TLR3-dependent responses to extracellular dsRNA are negatively regulated by MAVS, precisely "miniMAVS", a recently described 50kDa isoform of MAVS. This regulation of TLR3 by a MAVS isoform constitutes an endogenous regulatory mechanism in epithelial cells that could help prevent a potentially damaging excessive inflammatory response.
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Affiliation(s)
- Omar Lakhdari
- Laboratory of Mucosal Immunology, University of California San Diego, La Jolla, CA 92093, United States; Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States.
| | - Christopher S McAllister
- Laboratory of Mucosal Immunology, University of California San Diego, La Jolla, CA 92093, United States; Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States
| | - Michael Wang
- Laboratory of Mucosal Immunology, University of California San Diego, La Jolla, CA 92093, United States; Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States
| | - Ivelina Minev
- Laboratory of Mucosal Immunology, University of California San Diego, La Jolla, CA 92093, United States; Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States
| | - Lawrence S Prince
- Department of Pediatrics, University of California San Diego, La Jolla, CA 92093, United States
| | - Lars Eckmann
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States
| | - Martin F Kagnoff
- Laboratory of Mucosal Immunology, University of California San Diego, La Jolla, CA 92093, United States; Department of Medicine, University of California San Diego, La Jolla, CA 92093, United States; Department of Pediatrics, University of California San Diego, La Jolla, CA 92093, United States
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Benjamin JT, van der Meer R, Im AM, Plosa EJ, Zaynagetdinov R, Burman A, Havrilla ME, Gleaves LA, Polosukhin VV, Deutsch GH, Yanagisawa H, Davidson JM, Prince LS, Young LR, Blackwell TS. Epithelial-Derived Inflammation Disrupts Elastin Assembly and Alters Saccular Stage Lung Development. Am J Pathol 2016; 186:1786-1800. [PMID: 27181406 DOI: 10.1016/j.ajpath.2016.02.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 12/22/2022]
Abstract
The highly orchestrated interactions between the epithelium and mesenchyme required for normal lung development can be disrupted by perinatal inflammation in preterm infants, although the mechanisms are incompletely understood. We used transgenic (inhibitory κB kinase β transactivated) mice that conditionally express an activator of the NF-κB pathway in airway epithelium to investigate the impact of epithelial-derived inflammation during lung development. Epithelial NF-κB activation selectively impaired saccular stage lung development, with a phenotype comprising rapidly progressive distal airspace dilation, impaired gas exchange, and perinatal lethality. Epithelial-derived inflammation resulted in disrupted elastic fiber organization and down-regulation of elastin assembly components, including fibulins 4 and 5, lysyl oxidase like-1, and fibrillin-1. Fibulin-5 expression by saccular stage lung fibroblasts was consistently inhibited by treatment with bronchoalveolar lavage fluid from inhibitory κB kinase β transactivated mice, Escherichia coli lipopolysaccharide, or tracheal aspirates from preterm infants exposed to chorioamnionitis. Expression of a dominant NF-κB inhibitor in fibroblasts restored fibulin-5 expression after lipopolysaccharide treatment, whereas reconstitution of fibulin-5 rescued extracellular elastin assembly by saccular stage lung fibroblasts. Elastin organization was disrupted in saccular stage lungs of preterm infants exposed to systemic inflammation. Our study reveals a critical window for elastin assembly during the saccular stage that is disrupted by inflammatory signaling and could be amenable to interventions that restore elastic fiber assembly in the developing lung.
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Affiliation(s)
- John T Benjamin
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, Tennessee.
| | - Riet van der Meer
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Amanda M Im
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Erin J Plosa
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Rinat Zaynagetdinov
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Ankita Burman
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Madeline E Havrilla
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Linda A Gleaves
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Vasiliy V Polosukhin
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Gail H Deutsch
- Department of Pathology, Seattle Children's Hospital, Seattle, Washington
| | - Hiromi Yanagisawa
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Jeffrey M Davidson
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Lawrence S Prince
- Department of Pediatrics, Division of Neonatology, University of California-San Diego, San Diego, California
| | - Lisa R Young
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Pediatrics, Division of Pulmonary Medicine, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Timothy S Blackwell
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Nashville Veterans Affairs Medical Center, Nashville, Tennessee
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Stouch AN, McCoy AM, Greer RM, Lakhdari O, Yull FE, Blackwell TS, Hoffman HM, Prince LS. IL-1β and Inflammasome Activity Link Inflammation to Abnormal Fetal Airway Development. J Immunol 2016; 196:3411-20. [PMID: 26951798 DOI: 10.4049/jimmunol.1500906] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 02/16/2016] [Indexed: 12/13/2022]
Abstract
Inflammation in the developing preterm lung leads to disrupted airway morphogenesis and chronic lung disease in human neonates. However, the molecular mechanisms linking inflammation and the pathways controlling airway morphogenesis remain unclear. In this article, we show that IL-1β released by activated fetal lung macrophages is the key inflammatory mediator that disrupts airway morphogenesis. In mouse lung explants, blocking IL-1β expression, posttranslational processing, and signaling protected the formation of new airways from the inhibitory effects ofEscherichia coliLPS. Consistent with a critical role for IL-1β, mice expressing a gain-of-functionNlrp3allele and subsequent overactive inflammasome activity displayed abnormal saccular-stage lung morphogenesis and died soon after birth. Although the early-stage fetal lung appeared capable of mounting an NF-κB-mediated immune response, airway formation became more sensitive to inflammation later in development. This period of susceptibility coincided with higher expression of multiple inflammasome components that could increase the ability to release bioactive IL-1β. Macrophages fromNlrp3gain-of-function mice also expressed higher levels of more mature cell surface markers, additionally linking inflammasome activation with macrophage maturation. These data identify developmental expression of the inflammasome and IL-1β release by fetal lung macrophages as key mechanisms and potential therapeutic targets for neonatal lung disease.
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Affiliation(s)
- Ashley N Stouch
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093
| | - Alyssa M McCoy
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093
| | - Rachel M Greer
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093
| | - Fiona E Yull
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Timothy S Blackwell
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232; and Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Hal M Hoffman
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego and Rady Children's Hospital, San Diego, La Jolla, CA 92093;
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26
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Han W, Zaynagetdinov R, Yull FE, Polosukhin VV, Gleaves LA, Tanjore H, Young LR, Peterson TE, Manning HC, Prince LS, Blackwell TS. Molecular imaging of folate receptor β-positive macrophages during acute lung inflammation. Am J Respir Cell Mol Biol 2015; 53:50-9. [PMID: 25375039 DOI: 10.1165/rcmb.2014-0289oc] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Characterization of markers that identify activated macrophages could advance understanding of inflammatory lung diseases and facilitate development of novel methodologies for monitoring disease activity. We investigated whether folate receptor β (FRβ) expression could be used to identify and quantify activated macrophages in the lungs during acute inflammation induced by Escherichia coli LPS. We found that FRβ expression was markedly increased in lung macrophages at 48 hours after intratracheal LPS. In vivo molecular imaging with a fluorescent probe (cyanine 5 polyethylene glycol folate) showed that the fluorescence signal over the chest peaked at 48 hours after intratracheal LPS and was markedly attenuated after depletion of macrophages. Using flow cytometry, we identified the cells responsible for uptake of cyanine 5-conjugated folate as FRβ(+) interstitial macrophages and pulmonary monocytes, which coexpressed markers associated with an M1 proinflammatory macrophage phenotype. These findings were confirmed using a second model of acute lung inflammation generated by inducible transgenic expression of an NF-κB activator in airway epithelium. Using CC chemokine receptor 2-deficient mice, we found that FRβ(+) macrophage/monocyte recruitment was dependent on the monocyte chemotactic protein-1/CC chemokine receptor 2 pathway. Together, our results demonstrate that folate-based molecular imaging can be used as a noninvasive approach to detect classically activated monocytes/macrophages recruited to the lungs during acute inflammation.
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Affiliation(s)
- Wei Han
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine
| | - Rinat Zaynagetdinov
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine
| | | | - Vasiliy V Polosukhin
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine
| | - Linda A Gleaves
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine
| | - Harikrishna Tanjore
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine
| | - Lisa R Young
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine.,3 Division of Pulmonary Medicine, Department of Pediatrics
| | - Todd E Peterson
- 4 Department of Radiology and Radiological Sciences.,5 Institute of Imaging Science, and
| | - H Charles Manning
- 4 Department of Radiology and Radiological Sciences.,5 Institute of Imaging Science, and
| | - Lawrence S Prince
- 6 Division of Neonatology, Department of Pediatrics, University of California, San Diego, La Jolla, California; and
| | - Timothy S Blackwell
- 1 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine.,2 Department of Cancer Biology.,7 Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee.,8 Department of Veterans Affairs Medical Center, Nashville, Tennessee
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Plosa EJ, Young LR, Gulleman PM, Polosukhin VV, Zaynagetdinov R, Benjamin JT, Im AM, van der Meer R, Gleaves LA, Bulus N, Han W, Prince LS, Blackwell TS, Zent R. Epithelial β1 integrin is required for lung branching morphogenesis and alveolarization. J Cell Sci 2015. [DOI: 10.1242/jcs.167338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Plosa EJ, Young LR, Gulleman PM, Polosukhin VV, Zaynagetdinov R, Benjamin JT, Im AM, van der Meer R, Gleaves LA, Bulus N, Han W, Prince LS, Blackwell TS, Zent R. Epithelial β1 integrin is required for lung branching morphogenesis and alveolarization. Development 2014; 141:4751-62. [PMID: 25395457 PMCID: PMC4299273 DOI: 10.1242/dev.117200] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [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: 08/30/2014] [Accepted: 10/09/2014] [Indexed: 11/20/2022]
Abstract
Integrin-dependent interactions between cells and extracellular matrix regulate lung development; however, specific roles for β1-containing integrins in individual cell types, including epithelial cells, remain incompletely understood. In this study, the functional importance of β1 integrin in lung epithelium during mouse lung development was investigated by deleting the integrin from E10.5 onwards using surfactant protein C promoter-driven Cre. These mutant mice appeared normal at birth but failed to gain weight appropriately and died by 4 months of age with severe hypoxemia. Defects in airway branching morphogenesis in association with impaired epithelial cell adhesion and migration, as well as alveolarization defects and persistent macrophage-mediated inflammation were identified. Using an inducible system to delete β1 integrin after completion of airway branching, we showed that alveolarization defects, characterized by disrupted secondary septation, abnormal alveolar epithelial cell differentiation, excessive collagen I and elastin deposition, and hypercellularity of the mesenchyme occurred independently of airway branching defects. By depleting macrophages using liposomal clodronate, we found that alveolarization defects were secondary to persistent alveolar inflammation. β1 integrin-deficient alveolar epithelial cells produced excessive monocyte chemoattractant protein 1 and reactive oxygen species, suggesting a direct role for β1 integrin in regulating alveolar homeostasis. Taken together, these studies define distinct functions of epithelial β1 integrin during both early and late lung development that affect airway branching morphogenesis, epithelial cell differentiation, alveolar septation and regulation of alveolar homeostasis.
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Affiliation(s)
- Erin J Plosa
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lisa R Young
- Department of Pediatrics, Division of Pulmonary Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Peter M Gulleman
- Department of Pediatrics, Division of Pulmonary Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Vasiliy V Polosukhin
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Rinat Zaynagetdinov
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - John T Benjamin
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Amanda M Im
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Riet van der Meer
- Department of Pediatrics, Division of Neonatology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Linda A Gleaves
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nada Bulus
- Department of Medicine, Division of Nephrology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Wei Han
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lawrence S Prince
- Department of Pediatrics, Division of Neonatology, University of California San Diego, San Diego, CA 92103, USA
| | - Timothy S Blackwell
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA Nashville Veterans Affairs Medical Center, Nashville, TN 37232, USA
| | - Roy Zent
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Medicine, Division of Nephrology, Vanderbilt University Medical Center, Nashville, TN 37232, USA Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA Nashville Veterans Affairs Medical Center, Nashville, TN 37232, USA
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Abstract
Division of large, immature alveolar structures into smaller, more numerous alveoli increases the surface area available for gas exchange. Alveolar division requires precise epithelial-mesenchymal interactions. However, few experimental models exist for studying how these cell-cell interactions produce changes in 3-dimensional structure. Here we report an epithelial-mesenchymal cell co-culture model where 3-dimensional peaks form with similar cellular orientation as alveolar structures in vivo. Co-culturing fetal mouse lung mesenchyme with A549 epithelial cells produced tall peaks of cells covered by epithelia with cores of mesenchymal cells. These structures did not form when using adult lung fibroblasts. Peak formation did not require localized areas of cell proliferation or apoptosis. Mesenchymal cells co-cultured with epithelia adopted an elongated cell morphology closely resembling myofibroblasts within alveolar septa in vivo. Because inflammation inhibits alveolar formation, we tested the effects of E. coli lipopolysaccharide on 3-dimensional peak formation. Confocal and time-lapse imaging demonstrated that lipopolysaccharide reduced mesenchymal cell migration, resulting in fewer, shorter peaks with mesenchymal cells present predominantly at the base. This epithelial-mesenchymal co-culture model may therefore prove useful in future studies of mechanisms regulating alveolar morphogenesis.
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Key Words
- 3-D, 3-dimensional
- ATCC, American Type Culture Collection
- BALB/cJ, Bagg Albino
- BMP4, bone morphogenetic protein 4
- CO2, carbon dioxide
- DAPI, 4′, 6-Diamidino-2-Phenylindole, Dihydrochloride
- DEVD, acetyl-Asp-Glu-Val-Asp p-nitroanilide
- DMEM, Dulbecco's modified eagle medium
- DiI, 1, 1′-dioctadecyl-3, 3, 3′3′-tetramethylindocarbocyanine perchlorate
- E-cad, e-cadherin
- E. coli, Escherichia coli
- E15, embryonic day 15
- FBS, fetal bovine serum
- FGF, fibroblast growth factor
- LPS, lipopolysaccharide
- PDGF, platelet derived growth factor
- SHH, sonic hedgehog
- TGF-β, transforming growth factor beta
- TO-PRO-3, 4-[3-(3-methyl-2(3H)-benzothiazolylidene)-1-propenyl]-1-[3-(trimethylammonio)propyl]-, diiodide
- VEGF, vascular endothelial growth factor
- Z-VAD-FMK, Z-Val-Ala-Asp-CH2F
- alveolarization
- bronchopulmonary dysplasia
- lung development
- myofibroblast
- α-SMA, alpha-smooth muscle actin
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Affiliation(s)
- Rachel M Greer
- a Department of Pediatrics ; University of California San Diego; Rady Children's Hospital, San Diego ; San Diego , CA USA
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Stouch AN, Zaynagetdinov R, Barham WJ, Stinnett AM, Slaughter JC, Yull FE, Hoffman HM, Blackwell TS, Prince LS. IκB kinase activity drives fetal lung macrophage maturation along a non-M1/M2 paradigm. J Immunol 2014; 193:1184-93. [PMID: 24981452 DOI: 10.4049/jimmunol.1302516] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In preterm infants, exposure to inflammation increases the risk of bronchopulmonary dysplasia, a chronic, developmental lung disease. Although macrophages are the key cells that initiate lung inflammation, less is known about lung macrophage phenotype and maturation. We hypothesized that fetal lung macrophages mature into distinct subpopulations during mouse development, and that activation could influence macrophage maturation. Expression of the fetal macrophage markers CD68, CD86, CD206, Ym1, fibrinogen-like protein 2, and indolamine-2, 3-dioxygenase was developmentally regulated, with each marker having different temporal patterns. Flow cytometry analysis showed macrophages within the fetal lung were less diverse than the distinctly separate subpopulations in newborn and adult lungs. Similar to adult alveolar macrophages, fetal lung macrophages responded to the TLR4 agonist LPS and the alternative activation cytokines IL-4 and IL-13. Using a macrophage-specific constitutively active IκB Kinase transgenic model (IKFM), we demonstrated that macrophage activation increased proinflammatory gene expression and reduced the response of fetal lung macrophages to IL-4 and IL-13. Activation also increased fetal lung macrophage proliferation. Fetal IKFM lungs contained increased percentages of more mature, CD11b(low)F4/80(high) cells that also expressed higher levels of the alternative activation markers CD204 and CD206. Development of fetal lung macrophages into mature alveolar macrophages may therefore include features of both proinflammatory and alternative activation paradigms.
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Affiliation(s)
- Ashley N Stouch
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Rinat Zaynagetdinov
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Whitney J Barham
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Amanda M Stinnett
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - James C Slaughter
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Fiona E Yull
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Hal M Hoffman
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Timothy S Blackwell
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
| | - Lawrence S Prince
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093; Rady Children's Hospital, San Diego, CA 92123;Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232;Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232; andDepartment of Biostatistics, Vanderbilt University, Nashville, TN 37232
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Sen P, Yang Y, Navarro C, Silva I, Szafranski P, Kolodziejska KE, Dharmadhikari AV, Mostafa H, Kozakewich H, Kearney D, Cahill JB, Whitt M, Bilic M, Margraf L, Charles A, Goldblatt J, Gibson K, Lantz PE, Garvin AJ, Petty J, Kiblawi Z, Zuppan C, McConkie-Rosell A, McDonald MT, Peterson-Carmichael SL, Gaede JT, Shivanna B, Schady D, Friedlich PS, Hays SR, Palafoll IV, Siebers-Renelt U, Bohring A, Finn LS, Siebert JR, Galambos C, Nguyen L, Riley M, Chassaing N, Vigouroux A, Rocha G, Fernandes S, Brumbaugh J, Roberts K, Ho-Ming L, Lo IFM, Lam S, Gerychova R, Jezova M, Valaskova I, Fellmann F, Afshar K, Giannoni E, Muhlethaler V, Liang J, Beckmann JS, Lioy J, Deshmukh H, Srinivasan L, Swarr DT, Sloman M, Shaw-Smith C, van Loon RL, Hagman C, Sznajer Y, Barrea C, Galant C, Detaille T, Wambach JA, Cole FS, Hamvas A, Prince LS, Diderich KEM, Brooks AS, Verdijk RM, Ravindranathan H, Sugo E, Mowat D, Baker ML, Langston C, Welty S, Stankiewicz P. Novel FOXF1 mutations in sporadic and familial cases of alveolar capillary dysplasia with misaligned pulmonary veins imply a role for its DNA binding domain. Hum Mutat 2013; 34:801-11. [PMID: 23505205 PMCID: PMC3663886 DOI: 10.1002/humu.22313] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [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: 11/27/2012] [Accepted: 02/22/2013] [Indexed: 11/11/2022]
Abstract
Alveolar capillary dysplasia with misalignment of pulmonary veins (ACD/MPV) is a rare and lethal developmental disorder of the lung defined by a constellation of characteristic histopathological features. Nonpulmonary anomalies involving organs of gastrointestinal, cardiovascular, and genitourinary systems have been identified in approximately 80% of patients with ACD/MPV. We have collected DNA and pathological samples from more than 90 infants with ACD/MPV and their family members. Since the publication of our initial report of four point mutations and 10 deletions, we have identified an additional 38 novel nonsynonymous mutations of FOXF1 (nine nonsense, seven frameshift, one inframe deletion, 20 missense, and one no stop). This report represents an up to date list of all known FOXF1 mutations to the best of our knowledge. Majority of the cases are sporadic. We report four familial cases of which three show maternal inheritance, consistent with paternal imprinting of the gene. Twenty five mutations (60%) are located within the putative DNA-binding domain, indicating its plausible role in FOXF1 function. Five mutations map to the second exon. We identified two additional genic and eight genomic deletions upstream to FOXF1. These results corroborate and extend our previous observations and further establish involvement of FOXF1 in ACD/MPV and lung organogenesis.
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Affiliation(s)
- Partha Sen
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas 77030, USA.
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Carver BJ, Plosa EJ, Stinnett AM, Blackwell TS, Prince LS. Interactions between NF-κB and SP3 connect inflammatory signaling with reduced FGF-10 expression. J Biol Chem 2013; 288:15318-25. [PMID: 23558680 DOI: 10.1074/jbc.m112.447318] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Inflammation inhibits normal lung morphogenesis in preterm infants. Soluble inflammatory mediators present in the lungs of patients developing bronchopulmonary dysplasia disrupt expression of multiple genes critical for development. However, the mechanisms linking innate immune signaling and developmental programs are not clear. NF-κB activation inhibits expression of the critical morphogen FGF-10. Here, we show that interactions between the RELA subunit of NF-κB and SP3 suppress SP1-mediated FGF-10 expression. SP3 co-expression reduced SP1-mediated Fgf-10 promoter activity, suggesting antagonistic interactions between SP1 and SP3. Chromatin immunoprecipitation of LPS-treated primary mouse fetal lung mesenchymal cells detected increased interactions between SP3, RELA, and the Fgf-10 promoter. Expression of a constitutively active IκB kinase β mutant not only decreased Fgf-10 promoter activity but also increased RELA-SP3 nuclear interactions. Expression of a dominant-negative IκB, which blocks NF-κB nuclear translocation, prevented inhibition of FGF-10 by SP3. The inhibitory functions of SP3 required sequences located in the N-terminal region of the protein. These data suggested that inhibition of FGF-10 by inflammatory signaling involves the NF-κB-dependent interactions between RELA, SP3, and the Fgf-10 promoter. NF-κB activation may therefore lead to reduced gene expression by recruiting inhibitory factors to specific gene promoters following exposure to inflammatory stimuli.
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Affiliation(s)
- Billy J Carver
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA
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Goudy S, Angel P, Jacobs B, Hill C, Mainini V, Smith AL, Kousa YA, Caprioli R, Prince LS, Baldwin S, Schutte BC. Cell-autonomous and non-cell-autonomous roles for IRF6 during development of the tongue. PLoS One 2013; 8:e56270. [PMID: 23451037 PMCID: PMC3579850 DOI: 10.1371/journal.pone.0056270] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 11/14/2012] [Accepted: 01/07/2013] [Indexed: 12/04/2022] Open
Abstract
Interferon regulatory factor 6 (IRF6) encodes a highly conserved helix-turn-helix DNA binding protein and is a member of the interferon regulatory family of DNA transcription factors. Mutations in IRF6 lead to isolated and syndromic forms of cleft lip and palate, most notably Van der Woude syndrome (VWS) and Popliteal Ptyerigium Syndrome (PPS). Mice lacking both copies of Irf6 have severe limb, skin, palatal and esophageal abnormalities, due to significantly altered and delayed epithelial development. However, a recent report showed that MCS9.7, an enhancer near Irf6, is active in the tongue, suggesting that Irf6 may also be expressed in the tongue. Indeed, we detected Irf6 staining in the mesoderm-derived muscle during development of the tongue. Dual labeling experiments demonstrated that Irf6 was expressed only in the Myf5+ cell lineage, which originates from the segmental paraxial mesoderm and gives rise to the muscles of the tongue. Fate mapping of the segmental paraxial mesoderm cells revealed a cell-autonomous Irf6 function with reduced and poorly organized Myf5+ cell lineage in the tongue. Molecular analyses showed that the Irf6−/− embryos had aberrant cytoskeletal formation of the segmental paraxial mesoderm in the tongue. Fate mapping of the cranial neural crest cells revealed non-cell-autonomous Irf6 function with the loss of the inter-molar eminence. Loss of Irf6 function altered Bmp2, Bmp4, Shh, and Fgf10 signaling suggesting that these genes are involved in Irf6 signaling. Based on these data, Irf6 plays important cell-autonomous and non-cell-autonomous roles in muscular differentiation and cytoskeletal formation in the tongue.
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Affiliation(s)
- Steven Goudy
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee, United States of America.
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Abstract
BACKGROUND The regulation of epithelial cell shape and orientation during lung branching morphogenesis is not clearly understood. Nonmuscle myosins regulate cell size, morphology, and planar cell polarity. Here, we test the hypothesis that nonmuscle myosin II (NM II) regulates lung epithelial morphology in a spatially restricted manner. RESULTS Epithelial cell orientation at airway tips in fetal mouse lungs underwent a significant transformation at embryonic day (E) E17. Treatment of E15 lung explants with the NM II inhibitor blebbistatin increased airway branching, epithelial cell size, and the degree of anisotropy in epithelial cells lining the airway stalks. In cultured MLE-12 lung epithelial cells, blebbistatin increased cell velocity, but left the migratory response to FGF-10 unchanged. CONCLUSIONS In the developing lung, NM II acts to constrain cell morphology and orientation, but may be suppressed at sites of branching and cell migration. The regulation of epithelial orientation may therefore undergo dynamic variations from E15 to E17.
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Affiliation(s)
- Erin J Plosa
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Fike CD, Sidoryk-Wegrzynowicz M, Aschner M, Summar M, Prince LS, Cunningham G, Kaplowitz M, Zhang Y, Aschner JL. Prolonged hypoxia augments L-citrulline transport by system A in the newborn piglet pulmonary circulation. Cardiovasc Res 2012; 95:375-84. [PMID: 22673370 DOI: 10.1093/cvr/cvs186] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
AIMS Pulmonary arterial endothelial cells (PAECs) express the enzymes needed for generation of l-arginine from intracellular l-citrulline but do not express the enzymes needed for de novo l-citrulline synthesis. Hence, l-citrulline levels in PAECs are dependent on l-citrulline transport. Once generated, l-arginine can be converted to l-citrulline and nitric oxide (NO) by the enzyme NO synthase. We sought to determine whether hypoxia, a condition aetiologically linked to pulmonary hypertension, alters the transport of l-citrulline and the expression of the sodium-coupled neutral amino acid transporters (SNATs) in PAECs from newborn piglets. METHODS AND RESULTS PAECs isolated from newborn piglets were cultured under normoxic and hypoxic conditions and used to measure SNAT1, 2, 3, and 5 protein expression and (14)C-l-citrulline uptake. SNAT1 protein expression was increased, while SNAT2, SNAT3, and SNAT5 expression was unaltered in hypoxic PAECs. (14)C-l-citrulline uptake was increased in hypoxic PAECs. Studies with inhibitors of System A (SNAT1/2) and System N (SNAT3/5) revealed that the increased (14)C-l-citrulline uptake was largely due to System A-mediated transport. Additional studies were performed to evaluate SNAT protein expression and l-citrulline levels in lungs of piglets with chronic hypoxia-induced pulmonary hypertension and comparable age controls. Lungs from piglets raised in chronic hypoxia exhibited greater SNAT1 expression and higher l-citrulline levels than lungs from controls. CONCLUSION Increased SNAT1 expression and the concomitant enhanced ability to transport l-citrulline in PAECs could represent an important regulatory mechanism to counteract NO signalling impairments known to occur during the development of chronic hypoxia-induced pulmonary hypertension in newborns.
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Affiliation(s)
- Candice D Fike
- Department of Pediatrics, University School of Medicine, Vanderbilt University Medical Center, 2215 B Garland Ave., Nashville, TN 37232-0656, USA.
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Zhang C, Sherman MP, Prince LS, Bader D, Weitkamp JH, Slaughter JC, McElroy SJ. Paneth cell ablation in the presence of Klebsiella pneumoniae induces necrotizing enterocolitis (NEC)-like injury in the small intestine of immature mice. Dis Model Mech 2012; 5:522-32. [PMID: 22328592 PMCID: PMC3380715 DOI: 10.1242/dmm.009001] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Necrotizing enterocolitis (NEC) is a leading cause of morbidity and mortality in premature infants. During NEC pathogenesis, bacteria are able to penetrate innate immune defenses and invade the intestinal epithelial layer, causing subsequent inflammation and tissue necrosis. Normally, Paneth cells appear in the intestinal crypts during the first trimester of human pregnancy. Paneth cells constitute a major component of the innate immune system by producing multiple antimicrobial peptides and proinflammatory mediators. To better understand the possible role of Paneth cell disruption in NEC, we quantified the number of Paneth cells present in infants with NEC and found that they were significantly decreased compared with age-matched controls. We were able to model this loss in the intestine of postnatal day (P)14-P16 (immature) mice by treating them with the zinc chelator dithizone. Intestines from dithizone-treated animals retained approximately half the number of Paneth cells compared with controls. Furthermore, by combining dithizone treatment with exposure to Klebsiella pneumoniae, we were able to induce intestinal injury and inflammatory induction that resembles human NEC. Additionally, this novel Paneth cell ablation model produces NEC-like pathology that is consistent with other currently used animal models, but this technique is simpler to use, can be used in older animals that have been dam fed, and represents a novel line of investigation to study NEC pathogenesis and treatment.
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Affiliation(s)
- Chunxian Zhang
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Humphreys R, Zheng W, Prince LS, Qu X, Brown C, Loomes K, Huppert SS, Baldwin S, Goudy S. Cranial neural crest ablation of Jagged1 recapitulates the craniofacial phenotype of Alagille syndrome patients. Hum Mol Genet 2011; 21:1374-83. [PMID: 22156581 DOI: 10.1093/hmg/ddr575] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
JAGGED1 mutations cause Alagille syndrome, comprising a constellation of clinical findings, including biliary, cardiac and craniofacial anomalies. Jagged1, a ligand in the Notch signaling pathway, has been extensively studied during biliary and cardiac development. However, the role of JAGGED1 during craniofacial development is poorly understood. Patients with Alagille syndrome have midface hypoplasia giving them a characteristic 'inverted V' facial appearance. This study design determines the requirement of Jagged1 in the cranial neural crest (CNC) cells, which encompass the majority of mesenchyme present during craniofacial development. Furthermore, with this approach, we identify the autonomous and non-autonomous requirement of Jagged1 in a cell lineage-specific approach during midface development. Deleting Jagged1 in the CNC using Wnt1-cre; Jag1 Flox/Flox recapitulated the midfacial hypoplasia phenotype of Alagille syndrome. The Wnt1-cre; Jag1 Flox/Flox mice die at postnatal day 30 due to inability to masticate owing to jaw misalignment and poor occlusion. The etiology of midfacial hypoplasia in the Wnt1-cre; Jag1 Flox/Flox mice was a consequence of reduced cellular proliferation in the midface, aberrant vasculogenesis with decreased productive vessel branching and reduced extracellular matrix by hyaluronic acid staining, all of which are associated with midface anomalies and aberrant craniofacial growth. Deletion of Notch1 from the CNC using Wnt1-cre; Notch1 F/F mice did not recapitulate the midface hypoplasia of Alagille syndrome. These data demonstrate the requirement of Jagged1, but not Notch1, within the midfacial CNC population during development. Future studies will investigate the mechanism in which Jagged1 acts in a cell autonomous and cell non-autonomous manner.
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Affiliation(s)
- Ryan Humphreys
- Department of Surgery, Vanderbilt Medical Center, Nashville, TN 37232, USA
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Abstract
During fetal lung development, cells within the mesenchyme differentiate into vascular endothelia. This process of vasculogenesis gives rise to the cells that will eventually form the alveolar capillary bed. The cellular mechanisms regulating lung vasculogenesis are poorly understood, partly due to the lack of experimental systems that model this process. Here, we have developed and characterized a novel fetal mouse lung cell model of mesenchymal to endothelial differentiation. Using mesenchymal cells from the lungs of embryonal day 15 Immortomice, we show that endothelial growth media containing fibroblast growth factor-2 and vascular endothelial growth factor can stimulate formation of vascular endothelial cells in culture. These newly formed endothelial cells retain plasticity, as removing endothelial growth media causes loss of vascular markers and renewed formation of α-smooth muscle actin positive stress fibers. Cells with the highest Flk-1 expression differentiated into endothelia more efficiently. Individual mesenchymal cell clones had varied ability to acquire an endothelial phenotype. These fetal lung mesenchymal cells were multipotent, capable of differentiating into not only vascular endothelia, but also osteogenic and chondrongenic cell lineages. Our data establish a cell culture model for mesenchymal to endothelial differentiation that could prove useful for future mechanistic studies in the process of vasculogenesis both during normal development and in the pathogenesis of pulmonary vascular disease.
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Affiliation(s)
- Yasutoshi Yamamoto
- Division of Neonatology, Department of Pediatrics, Center for Stem Cell Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA
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McElroy SJ, Prince LS, Weitkamp JH, Reese J, Slaughter JC, Polk DB. Tumor necrosis factor receptor 1-dependent depletion of mucus in immature small intestine: a potential role in neonatal necrotizing enterocolitis. Am J Physiol Gastrointest Liver Physiol 2011; 301:G656-66. [PMID: 21737776 PMCID: PMC3191555 DOI: 10.1152/ajpgi.00550.2010] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Necrotizing enterocolitis (NEC) is a leading cause of morbidity and mortality in premature infants. NEC is believed to occur when intestinal bacteria invade the intestinal epithelial layer, causing subsequent inflammation and tissue necrosis. Mucins are produced and secreted by epithelial goblet cells as a key component of the innate immune system and barrier function of the intestinal tract that help protect against bacterial invasion. To better understand the role of mucins in NEC, we quantified the number of mucus-containing small intestinal goblet cells present in infants with NEC and found they had significantly fewer goblet cells and Paneth cells compared with controls. To test whether inflammation has a developmentally dependent effect on intestinal goblet cells, TNF-α was injected into mice at various stages of intestinal development. TNF-α caused a loss of mucus-containing goblet cells only in immature mice and induced Muc2 and Muc3 mRNA upregulation only in mature ileum. Only minimal changes were seen in apoptosis and in expression of markers of goblet cell differentiation. TNF-α increased small intestinal mucus secretion and goblet cell hypersensitivity to prostaglandin E2 (PGE(2)), a known mucus secretagogue produced by macrophages. These TNF-α-induced changes in mucus mRNA levels required TNF receptor 2 (TNFR2), whereas TNF-α-induced loss of mucus-positive goblet cells required TNFR1. Our findings of developmentally dependent TNF-α-induced alterations on intestinal mucus may help explain why NEC is predominantly found in premature infants, and TNF-α-induced alterations of the intestinal innate immune system and barrier functions may play a role in the pathogenesis of NEC itself.
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Affiliation(s)
| | - Lawrence S. Prince
- Departments of 1Pediatrics, ,3Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee;
| | | | - Jeff Reese
- Departments of 1Pediatrics, ,3Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee;
| | | | - D. Brent Polk
- Departments of 4Pediatrics and ,5Biochemistry and Molecular Biology, University of Southern California and The Saban Research Institute of Children's Hospital Los Angeles, Los Angeles, California
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Blackwell TS, Hipps AN, Yamamoto Y, Han W, Barham WJ, Ostrowski MC, Yull FE, Prince LS. NF-κB signaling in fetal lung macrophages disrupts airway morphogenesis. J Immunol 2011; 187:2740-7. [PMID: 21775686 DOI: 10.4049/jimmunol.1101495] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bronchopulmonary dysplasia is a common pulmonary complication of extreme prematurity. Arrested lung development leads to bronchopulmonary dysplasia, but the molecular pathways that cause this arrest are unclear. Lung injury and inflammation increase disease risk, but the cellular site of the inflammatory response and the potential role of localized inflammatory signaling in inhibiting lung morphogenesis are not known. In this study, we show that tissue macrophages present in the fetal mouse lung mediate the inflammatory response to LPS and that macrophage activation inhibits airway morphogenesis. Macrophage depletion or targeted inactivation of the NF-κB signaling pathway protected airway branching in cultured lung explants from the effects of LPS. Macrophages also appear to be the primary cellular site of IL-1β production following LPS exposure. Conversely, targeted NF-κB activation in transgenic macrophages was sufficient to inhibit airway morphogenesis. Macrophage activation in vivo inhibited expression of multiple genes critical for normal lung development, leading to thickened lung interstitium, reduced airway branching, and perinatal death. We propose that fetal lung macrophage activation contributes to bronchopulmonary dysplasia by generating a localized inflammatory response that disrupts developmental signals critical for lung formation.
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Affiliation(s)
- Timothy S Blackwell
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Benjamin JT, Carver BJ, Plosa EJ, Yamamoto Y, Miller JD, Liu JH, van der Meer R, Blackwell TS, Prince LS. NF-kappaB activation limits airway branching through inhibition of Sp1-mediated fibroblast growth factor-10 expression. J Immunol 2010; 185:4896-903. [PMID: 20861353 DOI: 10.4049/jimmunol.1001857] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bronchopulmonary dysplasia (BPD) is a frequent complication of preterm birth. This chronic lung disease results from arrested saccular airway development and is most common in infants exposed to inflammatory stimuli. In experimental models, inflammation inhibits expression of fibroblast growth factor-10 (FGF-10) and impairs epithelial-mesenchymal interactions during lung development; however, the mechanisms connecting inflammatory signaling with reduced growth factor expression are not yet understood. In this study we found that soluble inflammatory mediators present in tracheal fluid from preterm infants can prevent saccular airway branching. In addition, LPS treatment led to local production of mediators that inhibited airway branching and FGF-10 expression in LPS-resistant C.C3-Tlr4(Lpsd)/J fetal mouse lung explants. Both direct NF-κB activation and inflammatory cytokines (IL-1β and TNF-α) that activate NF-κB reduced FGF-10 expression, whereas chemokines that signal via other inflammatory pathways had no effect. Mutational analysis of the FGF-10 promoter failed to identify genetic elements required for direct NF-κB-mediated FGF-10 inhibition. Instead, NF-κB activation appeared to interfere with the normal stimulation of FGF-10 expression by Sp1. Chromatin immunoprecipitation and nuclear coimmunoprecipitation studies demonstrated that the RelA subunit of NF-κB and Sp1 physically interact at the FGF-10 promoter. These findings indicate that inflammatory signaling through NF-κB disrupts the normal expression of FGF-10 in fetal lung mesenchyme by interfering with the transcriptional machinery critical for lung morphogenesis.
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Affiliation(s)
- John T Benjamin
- Division of Neonatology, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Miller JD, Benjamin JT, Kelly DR, Frank DB, Prince LS. Chorioamnionitis stimulates angiogenesis in saccular stage fetal lungs via CC chemokines. Am J Physiol Lung Cell Mol Physiol 2010; 298:L637-45. [PMID: 20172951 DOI: 10.1152/ajplung.00414.2009] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The fetal lung vasculature forms in tandem with developing airways. Whereas saccular airway morphogenesis is arrested in bronchopulmonary dysplasia (BPD), the potential vascular phenotype in BPD at this stage of development is less well-understood. As inflammation increases the risk of BPD and induces arrest of saccular airway morphogenesis, we tested the effects of Escherichia coli LPS on fetal mouse lung vascular development. Injecting LPS into the amniotic fluid of Tie2-lacZ endothelial reporter mice at embryonic day 15 stimulated angiogenesis in the saccular stage fetal lung mesenchyme. LPS also increased the number of endothelial cells in saccular stage fetal mouse lung explants. Inflammation appeared to directly promote vascular development, as LPS stimulated pulmonary microvascular endothelial cell angiogenesis, cell migration, and proliferation in vitro. Whereas LPS did not increase expression of VEGF, angiopoietin-1 (Ang-1), Tie2, fetal liver kinase-1 (Flk-1), fms-like tyrosine kinase-1 (Flt-1), PDGFA, PDGFB, heparin-binding EGF-like growth factor (HB-EGF), or connective tissue growth factor (CTGF), LPS did stimulate the production of the angiogenic CC chemokines macrophage inflammatory protein-1α (MIP-1α) and monocyte chemoattractant protein-1 (MCP-1). Both MIP-1α and MCP-1 increased angiogenesis in fetal mouse lung explants. In addition, inhibitory antibodies against MIP-1α and MCP-1 blocked the effects of LPS on fetal lung vascular development, suggesting these chemokines are downstream mediators of LPS-induced angiogenesis. We speculate that an inflammation-mediated surge in angiogenesis could lead to formation of aberrant alveolar capillaries in the lungs of patients developing BPD.
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Affiliation(s)
- J Davin Miller
- Departments of Pediatrics, Monroe Carell Jr. Children's Hospital at Vanderbilt, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Benjamin JT, Gaston DC, Halloran BA, Schnapp LM, Zent R, Prince LS. The role of integrin alpha8beta1 in fetal lung morphogenesis and injury. Dev Biol 2009; 335:407-17. [PMID: 19769957 DOI: 10.1016/j.ydbio.2009.09.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Revised: 09/11/2009] [Accepted: 09/15/2009] [Indexed: 10/20/2022]
Abstract
Prenatal inflammation prevents normal lung morphogenesis and leads to bronchopulmonary dysplasia (BPD), a common complication of preterm birth. We previously demonstrated in a bacterial endotoxin mouse model of BPD that disrupting fibronectin localization in the fetal lung mesenchyme causes arrested saccular airway branching. In this study we show that expression of the fibronectin receptor, integrin alpha8beta1 is decreased in the lung mesenchyme in the same inflammation model suggesting it is required for normal lung development. We verified a role for integrin alpha8beta1 in lung development using integrin alpha8-null mice, which develop fusion of the medial and caudal lobes as well as abnormalities in airway division. We further show in vivo and in vitro that alpha8-null fetal lung mesenchymal cells fail to form stable adhesions and have increased migration. Thus we propose that integrin alpha8beta1 plays a critical role in lung morphogenesis by regulating mesenchymal cell adhesion and migration. Furthermore, our data suggest that disruption of the interactions between extracellular matrix and integrin alpha8beta1 may contribute to the pathogenesis of BPD.
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Affiliation(s)
- John T Benjamin
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232-0493, USA
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Wang H, Ding T, Brown N, Yamamoto Y, Prince LS, Reese J, Paria BC. Zonula occludens-1 (ZO-1) is involved in morula to blastocyst transformation in the mouse. Dev Biol 2008; 318:112-25. [PMID: 18423437 PMCID: PMC2442465 DOI: 10.1016/j.ydbio.2008.03.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [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: 04/14/2007] [Revised: 02/13/2008] [Accepted: 03/06/2008] [Indexed: 12/15/2022]
Abstract
It is unknown whether or not tight junction formation plays any role in morula to blastocyst transformation that is associated with development of polarized trophoblast cells and fluid accumulation. Tight junctions are a hallmark of polarized epithelial cells and zonula occludens-1 (ZO-1) is a known key regulator of tight junction formation. Here we show that ZO-1 protein is first expressed during compaction of 8-cell embryos. This stage-specific appearance of ZO-1 suggests its participation in morula to blastocyst transition. Consistent with this idea, we demonstrate that ZO-1 siRNA delivery inside the blastomeres of zona-weakened embryos using electroporation not only knocks down ZO-1 gene and protein expressions, but also inhibits morula to blastocyst transformation in a concentration-dependent manner. In addition, ZO-1 inactivation reduced the expression of Cdx2 and Oct-4, but not ZO-2 and F-actin. These results provide the first evidence that ZO-1 is involved in blastocyst formation from the morula by regulating accumulation of fluid and differentiation of nonpolar blastomeres to polar trophoblast cells.
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Affiliation(s)
- Hehai Wang
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Tianbing Ding
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Naoko Brown
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Yasutoshi Yamamoto
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Lawrence S. Prince
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Jeff Reese
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - B. C. Paria
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232
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Benjamin JT, Smith RJ, Halloran BA, Day TJ, Kelly DR, Prince LS. FGF-10 is decreased in bronchopulmonary dysplasia and suppressed by Toll-like receptor activation. Am J Physiol Lung Cell Mol Physiol 2006; 292:L550-8. [PMID: 17071719 DOI: 10.1152/ajplung.00329.2006] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Many extremely preterm infants continue to suffer from bronchopulmonary dysplasia, which results from abnormal saccular-stage lung development. Here, we show that fibroblast growth factor-10 (FGF-10) is required for saccular lung development and reduced in the lung tissue of infants with bronchopulmonary dysplasia. Although exposure to bacteria increases the risk of bronchopulmonary dysplasia, no molecular target has been identified connecting inflammatory stimuli and abnormal lung development. In an experimental mouse model of saccular lung development, activation of Toll-like receptor 2 (TLR2) or Toll-like receptor 4 (TLR4) inhibited FGF-10 expression, leading to abnormal saccular airway morphogenesis. In addition, Toll-mediated FGF-10 inhibition disrupted the normal positioning of myofibroblasts around saccular airways, similar to the mislocalization of myofibroblasts seen in patients with bronchopulmonary dysplasia. Reduced FGF-10 expression may therefore link the innate immune system and impaired lung development in bronchopulmonary dysplasia.
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Affiliation(s)
- John T Benjamin
- Departments of Pediatrics, Children's Hospital of Alabama, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Abstract
Hyperoxia contributes to the development of bronchopulmonary dysplasia in former premature infants. Injurious environmental factors such as hyperoxia may disrupt distal airway branching and alveolar septation, as these critical stages in lung development occur following birth in extremely premature infants. To test if hyperoxia directly inhibited distal airway branching, we cultured E16 fetal mouse lung explants in either 20% (control) or 95% oxygen (hyperoxia). Hyperoxia reduced the number of distal airways to less than 50% of controls. Explants cultured in 95% oxygen also had fewer complex distal airways compared with controls. Mesenchymal cells adjacent to distal airways in hyperoxic explants appeared apoptotic by phase microscopy. Consistent with increased apoptosis, explants cultured in hyperoxia had increased caspase 3/7 activity compared with controls. Hyperoxia also increased mesenchymal caspase 3 expression and annexin V binding within cultured explants as visualized by fluorescence microscopy. We measured increased annexin V binding in isolated primary fetal lung mesenchymal cells cultured in 95% oxygen suggesting a direct effect on cells within the mesenchyme. Hyperoxia can lead to NF-kappaB activation, which mediates inflammatory cascades and may protect cells from apoptosis. We detected NF-kappaB activation and nuclear p65 localization in explants exposed to 48 h of hyperoxia. Inhibition of NF-kappaB prevented the hyperoxia-induced activation of caspase 3. NF-kappaB activation may therefore contribute to apoptosis in the developing fetal mouse lung following hyperoxia exposure. Our data suggest hyperoxia inhibits distal airway branching and directly induces apoptosis of the fetal mouse lung mesenchyme.
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Prince LS, Dieperink HI, Okoh VO, Fierro-Perez GA, Lallone RL. Toll-like receptor signaling inhibits structural development of the distal fetal mouse lung. Dev Dyn 2005; 233:553-61. [PMID: 15830384 DOI: 10.1002/dvdy.20362] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We tested the hypothesis that innate immune signaling in utero could disrupt the structural development of the fetal lung, contributing to the pathogenesis of bronchopulmonary dysplasia. Injection of Escherichia coli lipopolysaccharide (LPS) into the amniotic fluid of E15 BALB/cJ mice increased the luminal volume density of fetal mouse lungs at embryonic day (E) 17 and E18. LPS also increased luminal volume and decreased distal lung branching in fetal mouse lung explants. This effect required NF-kappaB activation and functional Toll-Like Receptor 4. Airway branching may require fibronectin-dependent epithelial-mesenchymal interactions, representing a potential target for innate immune signaling. Anti-fibronectin antibodies and LPS both blocked distal lung branching. By immunofluorescence, fibronectin localized to the clefts between newly formed airways but was restricted to peripheral mesenchymal cells in LPS-exposed explants. These data suggest that LPS may alter the expression pattern of mesenchymal fibronectin, potentially disrupting epithelial-mesenchymal interactions and inhibiting distal airway branching and alveolarization. This mechanism may link innate immune signaling with defects in structural development of the fetal lung.
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Affiliation(s)
- Lawrence S Prince
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.
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Prince LS, Okoh VO, Moninger TO, Matalon S. Lipopolysaccharide increases alveolar type II cell number in fetal mouse lungs through Toll-like receptor 4 and NF-κB. Am J Physiol Lung Cell Mol Physiol 2004; 287:L999-1006. [PMID: 15475494 DOI: 10.1152/ajplung.00111.2004] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Chorioamnionitis is a major cause of preterm delivery. Infants exposed to inflammation in utero and then born preterm may have improved lung function in the immediate postnatal period. We developed a mouse model of chorioamnionitis to study the inflammatory signaling mechanisms that might influence fetal lung maturation. With this in vivo model, we found that Escherichia coli lipopolysaccharide (LPS) increased the number of alveolar type II cells in the fetal mouse lung. LPS also increased type II cell number in cultured fetal lung explants, suggesting that LPS could directly signal the fetal lung in the absence of maternal influences. Using immunostaining, we localized cells within the fetal mouse lung expressing the LPS receptor molecule Toll-like receptor 4 (TLR4). Similar to the signaling pathways in inflammatory cells, LPS activated NF-κB in fetal lung explants. Activation of the TLR4/NF-κB pathway appeared to be required, as LPS did not increase the number of type II cells in C.C3H- Tlr4 Lps-d mice, a congenic strain containing a loss of function mutation in tlr4. In addition, the sesquiterpene lactone parthenolide inhibited NF-κB activation following LPS exposure and blocked the LPS-induced increase in type II cells. On the basis of these data from our mouse model of chorioamnionitis, it appears that LPS specifically activated the TLR4/NF-κB pathway, leading to increased type II cell maturation. These data implicate an important signaling mechanism in chorioamnionitis and suggest the TLR4/NF-κB pathway can influence lung development.
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Affiliation(s)
- Lawrence S Prince
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama 35249, USA.
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Carlo WA, Prince LS, St John EB, Ambalavanan N. Care of very low birth weight infants with respiratory distress syndrome: an evidence-based review. Minerva Pediatr 2004; 56:373-80. [PMID: 15457135] [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: 04/30/2023]
Abstract
Since 1959, when it was reported that many preterm infants had surfactant deficiency, there has been a remarkable improvement in the prevention of respiratory distress syndrome (RDS) and in the care of infants who develop RDS. Antenatal corticosteroids and surfactant replacement have improved the care of very low birth weight infants.
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Affiliation(s)
- W A Carlo
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35233-7335, USA.
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