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Sciarretta F, Ninni A, Zaccaria F, Chiurchiù V, Bertola A, Karlinsey K, Jia W, Ceci V, Di Biagio C, Xu Z, Gaudioso F, Tortolici F, Tiberi M, Zhang J, Carotti S, Boudina S, Grumati P, Zhou B, Brestoff JR, Ivanov S, Aquilano K, Lettieri-Barbato D. Lipid-associated macrophages reshape BAT cell identity in obesity. Cell Rep 2024; 43:114447. [PMID: 38963761 DOI: 10.1016/j.celrep.2024.114447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 03/04/2024] [Accepted: 06/20/2024] [Indexed: 07/06/2024] Open
Abstract
Obesity and type 2 diabetes cause a loss in brown adipose tissue (BAT) activity, but the molecular mechanisms that drive BAT cell remodeling remain largely unexplored. Using a multilayered approach, we comprehensively mapped a reorganization in BAT cells. We uncovered a subset of macrophages as lipid-associated macrophages (LAMs), which were massively increased in genetic and dietary model of BAT expansion. LAMs participate in this scenario by capturing extracellular vesicles carrying damaged lipids and mitochondria released from metabolically stressed brown adipocytes. CD36 scavenger receptor drove LAM phenotype, and CD36-deficient LAMs were able to increase brown fat genes in adipocytes. LAMs released transforming growth factor β1 (TGF-β1), which promoted the loss of brown adipocyte identity through aldehyde dehydrogenase 1 family member A1 (Aldh1a1) induction. These findings unfold cell dynamic changes in BAT during obesity and identify LAMs as key responders to tissue metabolic stress and drivers of loss of brown adipocyte identity.
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Affiliation(s)
| | - Andrea Ninni
- Department of Biology, University of Rome Tor Vergata, Rome, Italy; PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Fabio Zaccaria
- Department of Biology, University of Rome Tor Vergata, Rome, Italy; PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Valerio Chiurchiù
- Laboratory of Resolution of Neuroinflammation, IRCCS Santa Lucia Foundation, Rome, Italy; Institute of Translational Pharmacology, National Research Council, Rome, Italy
| | | | - Keaton Karlinsey
- Department of Immunology, School of Medicine, University of Connecticut, Farmington, CT, USA
| | - Wentong Jia
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Veronica Ceci
- Department of Biology, University of Rome Tor Vergata, Rome, Italy; PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | | | - Ziyan Xu
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Francesco Gaudioso
- IRCCS Santa Lucia Foundation, Rome, Italy; Department of Biology, University of Rome Tor Vergata, Rome, Italy; PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Flavia Tortolici
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Marta Tiberi
- Laboratory of Resolution of Neuroinflammation, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Jiabi Zhang
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Simone Carotti
- Integrated Research Center (PRAAB), Campus Biomedico University of Rome, Rome, Italy
| | - Sihem Boudina
- Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA; Molecular Medicine Program (U2M2), University of Utah, Salt Lake City, UT, USA
| | - Paolo Grumati
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy; Department of Clinical Medicine and Surgery, University Federico II, Naples, Italy
| | - Beiyan Zhou
- Department of Immunology, School of Medicine, University of Connecticut, Farmington, CT, USA; Institute for Systems Genomics, University of Connecticut, Farmington, CT, USA
| | - Jonathan R Brestoff
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA
| | | | - Katia Aquilano
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Daniele Lettieri-Barbato
- Department of Biology, University of Rome Tor Vergata, Rome, Italy; IRCCS Fondazione Bietti, Rome, Italy.
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2
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Gan PXL, Zhang S, Fred Wong WS. Targeting reprogrammed metabolism as a therapeutic approach for respiratory diseases. Biochem Pharmacol 2024:116187. [PMID: 38561090 DOI: 10.1016/j.bcp.2024.116187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/20/2024] [Accepted: 03/29/2024] [Indexed: 04/04/2024]
Abstract
Metabolic reprogramming underlies the etiology and pathophysiology of respiratory diseases such as asthma, idiopathic pulmonary fibrosis (IPF), and chronic obstructive pulmonary disease (COPD). The dysregulated cellular activities driving airway inflammation and remodelling in these diseases have reportedly been linked to aberrant shifts in energy-producing metabolic pathways: glycolysis and oxidative phosphorylation (OXPHOS). The rewiring of glycolysis and OXPHOS accompanying the therapeutic effects of many clinical compounds and natural products in asthma, IPF, and COPD, supports targeting metabolism as a therapeutic approach for respiratory diseases. Correspondingly, inhibiting glycolysis has largely attested effective against experimental asthma, IPF, and COPD. However, modulating OXPHOS and its supporting catabolic pathways like mitochondrial pyruvate catabolism, fatty acid β-oxidation (FAO), and glutaminolysis for these respiratory diseases remain inconclusive. An emerging repertoire of metabolic enzymes are also interconnected to these canonical metabolic pathways that similarly possess therapeutic potential for respiratory diseases. Taken together, this review highlights the urgent demand for future studies to ascertain the role of OXPHOS in different respiratory diseases, under different stimulatory conditions, and in different cell types. While this review provides strong experimental evidence in support of the inhibition of glycolysis for asthma, IPF, and COPD, further verification by clinical trials is definitely required.
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Affiliation(s)
- Phyllis X L Gan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Singapore-HUJ Alliance for Research and Enterprise, National University of Singapore, Singapore
| | - Shanshan Zhang
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - W S Fred Wong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Singapore-HUJ Alliance for Research and Enterprise, National University of Singapore, Singapore; Drug Discovery and Optimization Platform, Yong Loo Lin School of Medicine, National University Health System, Singapore.
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3
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Kryvenko V, Vadász I. Alveolar-capillary endocytosis and trafficking in acute lung injury and acute respiratory distress syndrome. Front Immunol 2024; 15:1360370. [PMID: 38533500 PMCID: PMC10963603 DOI: 10.3389/fimmu.2024.1360370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/29/2024] [Indexed: 03/28/2024] Open
Abstract
Acute respiratory distress syndrome (ARDS) is associated with high morbidity and mortality but lacks specific therapeutic options. Diverse endocytic processes play a key role in all phases of acute lung injury (ALI), including the initial insult, development of respiratory failure due to alveolar flooding, as a consequence of altered alveolar-capillary barrier function, as well as in the resolution or deleterious remodeling after injury. In particular, clathrin-, caveolae-, endophilin- and glycosylphosphatidyl inositol-anchored protein-mediated endocytosis, as well as, macropinocytosis and phagocytosis have been implicated in the setting of acute lung damage. This manuscript reviews our current understanding of these endocytic pathways and subsequent intracellular trafficking in various phases of ALI, and also aims to identify potential therapeutic targets for patients with ARDS.
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Affiliation(s)
- Vitalii Kryvenko
- Department of Internal Medicine, Justus Liebig University, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
- The Cardio-Pulmonary Institute (CPI), Giessen, Germany
- Institute for Lung Health (ILH), Giessen, Germany
| | - István Vadász
- Department of Internal Medicine, Justus Liebig University, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
- The Cardio-Pulmonary Institute (CPI), Giessen, Germany
- Institute for Lung Health (ILH), Giessen, Germany
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4
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Kwak D, Bradley PB, Subbotina N, Ling S, Teitz-Tennenbaum S, Osterholzer JJ, Sisson TH, Kim KK. CD36/Lyn kinase interactions within macrophages promotes pulmonary fibrosis in response to oxidized phospholipid. Respir Res 2023; 24:314. [PMID: 38098035 PMCID: PMC10722854 DOI: 10.1186/s12931-023-02629-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 12/04/2023] [Indexed: 12/17/2023] Open
Abstract
Recent data from human studies and animal models have established roles for type II alveolar epithelial cell (AEC2) injury/apoptosis and monocyte/macrophage accumulation and activation in progressive lung fibrosis. Although the link between these processes is not well defined, we have previously shown that CD36-mediated uptake of apoptotic AEC2s by lung macrophages is sufficient to drive fibrosis. Importantly, apoptotic AEC2s are rich in oxidized phospholipids (oxPL), and amongst its multiple functions, CD36 serves as a scavenger receptor for oxPL. Recent studies have established a role for oxPLs in alveolar scarring, and we hypothesized that uptake and accrual of oxPL by CD36 would cause a macrophage phenotypic change that promotes fibrosis. To test this hypothesis, we treated wild-type and CD36-null mice with the oxPL derivative oxidized phosphocholine (POVPC) and found that CD36-null mice were protected from oxPL-induced scarring. Compared to WT mice, fewer macrophages accumulated in the lungs of CD36-null animals, and the macrophages exhibited a decreased accumulation of intracellular oxidized lipid. Importantly, the attenuated accrual of oxPL in CD36-null macrophages was associated with diminished expression of the profibrotic mediator, TGFβ. Finally, the pathway linking oxPL uptake and TGFβ expression was found to require CD36-mediated activation of Lyn kinase. Together, these observations elucidate a causal pathway that connects AEC2 injury with lung macrophage activation via CD36-mediated uptake of oxPL and suggest several potential therapeutic targets.
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Affiliation(s)
- Doyun Kwak
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
| | - Patrick B Bradley
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
| | - Natalia Subbotina
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
| | - Song Ling
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
| | - Seagal Teitz-Tennenbaum
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
- Pulmonary Section, Department of Medicine, VA Ann Arbor Health System, Ann Arbor, MI, 48105, USA
| | - John J Osterholzer
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
- Pulmonary Section, Department of Medicine, VA Ann Arbor Health System, Ann Arbor, MI, 48105, USA
| | - Thomas H Sisson
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA
| | - Kevin K Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 109 Zina Pitcher Place, BSRB 4061, Ann Arbor, MI, 48109, USA.
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5
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Bamgbose TT, Schilke RM, Igiehon OO, Nkadi EH, Custis D, Bharrhan S, Schwarz B, Bohrnsen E, Bosio CM, Scott RS, Yurdagul A, Finck BN, Woolard MD. Lipin-1 restrains macrophage lipid synthesis to promote inflammation resolution. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.23.563587. [PMID: 37961352 PMCID: PMC10634750 DOI: 10.1101/2023.10.23.563587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Macrophages are critical to maintaining and restoring tissue homeostasis during inflammation. The lipid metabolic state of macrophages influences their function, but a deeper understanding of how lipid metabolism is regulated in pro-resolving macrophage responses is needed. Lipin-1 is a phosphatidic acid phosphatase with a transcriptional coregulatory activity (TC) that regulates lipid metabolism. We previously demonstrated that lipin-1 supports pro-resolving macrophage responses, and here, myeloid-associated lipin-1 is required for inflammation resolution, yet how lipin-1-regulated cellular mechanisms promote macrophage pro-resolution responses is unknown. We demonstrated that the loss of lipin-1 in macrophages led to increased free fatty acid, neutral lipid, and ceramide content and increased phosphorylation of acetyl-CoA carboxylase. The inhibition of the first step of lipid synthesis and transport of citrate from the mitochondria in macrophages reduced lipid content and restored efferocytosis and inflammation resolution in lipin-1mKO macrophages and mice. Our findings suggest macrophage-associated lipin-1 restrains lipid synthesis, promoting pro-resolving macrophage function in response to pro-resolving stimuli.
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Affiliation(s)
- Temitayo T. Bamgbose
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Robert M. Schilke
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Oluwakemi O. Igiehon
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Ebubechukwu H. Nkadi
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - David Custis
- Research Core Facility, Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Sushma Bharrhan
- Center for Applied Immunology and Pathological Processes (CAIPP), Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Benjamin Schwarz
- Proteins & Chemistry Section, Research and Technologies Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, Hamilton, MT
| | - Eric Bohrnsen
- Proteins & Chemistry Section, Research and Technologies Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, Hamilton, MT
| | - Catharine M. Bosio
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, Hamilton, MT
| | - Rona S. Scott
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
- Center for Applied Immunology and Pathological Processes (CAIPP), Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - Arif Yurdagul
- Department of Molecular and Cellular Physiology, Louisiana State University Health Shreveport, Shreveport, LA, United States
| | - Brian N. Finck
- Division of Nutritional Sciences and Obesity Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - Matthew D. Woolard
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, United States
- Center for Applied Immunology and Pathological Processes (CAIPP), Louisiana State University Health Sciences Center, Shreveport, LA, United States
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6
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Szrok-Jurga S, Czumaj A, Turyn J, Hebanowska A, Swierczynski J, Sledzinski T, Stelmanska E. The Physiological and Pathological Role of Acyl-CoA Oxidation. Int J Mol Sci 2023; 24:14857. [PMID: 37834305 PMCID: PMC10573383 DOI: 10.3390/ijms241914857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/27/2023] [Accepted: 09/30/2023] [Indexed: 10/15/2023] Open
Abstract
Fatty acid metabolism, including β-oxidation (βOX), plays an important role in human physiology and pathology. βOX is an essential process in the energy metabolism of most human cells. Moreover, βOX is also the source of acetyl-CoA, the substrate for (a) ketone bodies synthesis, (b) cholesterol synthesis, (c) phase II detoxication, (d) protein acetylation, and (d) the synthesis of many other compounds, including N-acetylglutamate-an important regulator of urea synthesis. This review describes the current knowledge on the importance of the mitochondrial and peroxisomal βOX in various organs, including the liver, heart, kidney, lung, gastrointestinal tract, peripheral white blood cells, and other cells. In addition, the diseases associated with a disturbance of fatty acid oxidation (FAO) in the liver, heart, kidney, lung, alimentary tract, and other organs or cells are presented. Special attention was paid to abnormalities of FAO in cancer cells and the diseases caused by mutations in gene-encoding enzymes involved in FAO. Finally, issues related to α- and ω- fatty acid oxidation are discussed.
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Affiliation(s)
- Sylwia Szrok-Jurga
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Aleksandra Czumaj
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Medical University of Gdansk, 80-211 Gdansk, Poland;
| | - Jacek Turyn
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Areta Hebanowska
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Julian Swierczynski
- Institue of Nursing and Medical Rescue, State University of Applied Sciences in Koszalin, 75-582 Koszalin, Poland;
| | - Tomasz Sledzinski
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Medical University of Gdansk, 80-211 Gdansk, Poland;
| | - Ewa Stelmanska
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
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7
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Rajesh R, Atallah R, Bärnthaler T. Dysregulation of metabolic pathways in pulmonary fibrosis. Pharmacol Ther 2023; 246:108436. [PMID: 37150402 DOI: 10.1016/j.pharmthera.2023.108436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/09/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic progressive disorder of unknown origin and the most common interstitial lung disease. It progresses with the recruitment of fibroblasts and myofibroblasts that contribute to the accumulation of extracellular matrix (ECM) proteins, leading to the loss of compliance and alveolar integrity, compromising the gas exchange capacity of the lung. Moreover, while there are therapeutics available, they do not offer a cure. Thus, there is a pressing need to identify better therapeutic targets. With the advent of transcriptomics, proteomics, and metabolomics, the cellular mechanisms underlying disease progression are better understood. Metabolic homeostasis is one such factor and its dysregulation has been shown to impact the outcome of IPF. Several metabolic pathways involved in the metabolism of lipids, protein and carbohydrates have been implicated in IPF. While metabolites are crucial for the generation of energy, it is now appreciated that metabolites have several non-metabolic roles in regulating cellular processes such as proliferation, signaling, and death among several other functions. Through this review, we succinctly elucidate the role of several metabolic pathways in IPF. Moreover, we also discuss potential therapeutics which target metabolism or metabolic pathways.
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Affiliation(s)
- Rishi Rajesh
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Reham Atallah
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Thomas Bärnthaler
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria.
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8
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Principi L, Ferrini E, Ciccimarra R, Pagani L, Chinello C, Previtali P, Smith A, Villetti G, Zoboli M, Ravanetti F, Stellari FF, Magni F, Piga I. Proteomic Fingerprint of Lung Fibrosis Progression and Response to Therapy in Bleomycin-Induced Mouse Model. Int J Mol Sci 2023; 24:ijms24054410. [PMID: 36901840 PMCID: PMC10002924 DOI: 10.3390/ijms24054410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/25/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease characterized by the aberrant accumulation of extracellular matrix in the lungs. nintedanib is one of the two FDA-approved drugs for IPF treatment; however, the exact pathophysiological mechanisms of fibrosis progression and response to therapy are still poorly understood. In this work, the molecular fingerprint of fibrosis progression and response to nintedanib treatment have been investigated by mass spectrometry-based bottom-up proteomics in paraffin-embedded lung tissues from bleomycin-induced (BLM) pulmonary fibrosis mice. Our proteomics results unveiled that (i) samples clustered depending on the tissue fibrotic grade (mild, moderate, and severe) and not on the time course after BLM treatment; (ii) the dysregulation of different pathways involved in fibrosis progression such as the complement coagulation cascades, advanced glycation end products (AGEs) and their receptors (RAGEs) signaling, the extracellular matrix-receptor interaction, the regulation of actin cytoskeleton, and ribosomes; (iii) Coronin 1A (Coro1a) as the protein with the highest correlation when evaluating the progression of fibrosis, with an increased expression from mild to severe fibrosis; and (iv) a total of 10 differentially expressed proteins (padj-value ≤ 0.05 and Fold change ≤-1.5 or ≥1.5), whose abundance varied in the base of the severity of fibrosis (mild and moderate), were modulated by the antifibrotic treatment with nintedanib, reverting their trend. Notably, nintedanib significantly restored lactate dehydrogenase B (Ldhb) expression but not lactate dehydrogenase A (Ldha). Notwithstanding the need for further investigations to validate the roles of both Coro1a and Ldhb, our findings provide an extensive proteomic characterization with a strong relationship with histomorphometric measurements. These results unveil some biological processes in pulmonary fibrosis and drug-mediated fibrosis therapy.
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Affiliation(s)
- Lucrezia Principi
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Erica Ferrini
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | - Roberta Ciccimarra
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | - Lisa Pagani
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Clizia Chinello
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Paolo Previtali
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Andrew Smith
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Gino Villetti
- Experimental Pharmacology & Translational Science Department, Chiesi Farmaceutici S.p.A., 43122 Parma, Italy
| | - Matteo Zoboli
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | | | - Franco Fabio Stellari
- Experimental Pharmacology & Translational Science Department, Chiesi Farmaceutici S.p.A., 43122 Parma, Italy
- Correspondence: (F.F.S.); (I.P.)
| | - Fulvio Magni
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Isabella Piga
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
- Correspondence: (F.F.S.); (I.P.)
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9
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Samovski D, Jacome-Sosa M, Abumrad NA. Fatty Acid Transport and Signaling: Mechanisms and Physiological Implications. Annu Rev Physiol 2023; 85:317-337. [PMID: 36347219 DOI: 10.1146/annurev-physiol-032122-030352] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Long-chain fatty acids (FAs) are components of plasma membranes and an efficient fuel source and also serve as metabolic regulators through FA signaling mediated by membrane FA receptors. Impaired tissue FA uptake has been linked to major complications of obesity, including insulin resistance, cardiovascular disease, and type 2 diabetes. Fatty acid interactions with a membrane receptor and the initiation of signaling can modify pathways related to nutrient uptake and processing, cell proliferation or differentiation, and secretion of bioactive factors. Here, we review the major membrane receptors involved in FA uptake and FA signaling. We focus on two types of membrane receptors for long-chain FAs: CD36 and the G protein-coupled FA receptors FFAR1 and FFAR4. We describe key signaling pathways and metabolic outcomes for CD36, FFAR1, and FFAR4 and highlight the parallels that provide insight into FA regulation of cell function.
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Affiliation(s)
- Dmitri Samovski
- Center for Human Nutrition, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA;
| | - Miriam Jacome-Sosa
- Center for Human Nutrition, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA;
| | - Nada A Abumrad
- Center for Human Nutrition, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA; .,Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, USA
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10
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Harder JW, Ma J, Alard P, Sokoloski KJ, Mathiowitz E, Furtado S, Egilmez NK, Kosiewicz MM. Male microbiota-associated metabolite restores macrophage efferocytosis in female lupus-prone mice via activation of PPARγ/LXR signaling pathways. J Leukoc Biol 2023; 113:41-57. [PMID: 36822162 DOI: 10.1093/jleuko/qiac002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 01/11/2023] Open
Abstract
Systemic lupus erythematosus development is influenced by both sex and the gut microbiota. Metabolite production is a major mechanism by which the gut microbiota influences the immune system, and we have previously found differences in the fecal metabolomic profiles of lupus-prone female and lupus-resistant male BWF1 mice. Here we determine how sex and microbiota metabolite production may interact to affect lupus. Transcriptomic analysis of female and male splenocytes showed genes that promote phagocytosis were upregulated in BWF1 male mice. Because patients with systemic lupus erythematosus exhibit defects in macrophage-mediated phagocytosis of apoptotic cells (efferocytosis), we compared splenic macrophage efferocytosis in vitro between female and male BWF1 mice. Macrophage efferocytosis was deficient in female compared to male BWF1 mice but could be restored by feeding male microbiota. Further transcriptomic analysis of the genes upregulated in male BWF1 mice revealed enrichment of genes stimulated by PPARγ and LXR signaling. Our previous fecal metabolomics analyses identified metabolites in male BWF1 mice that can activate PPARγ and LXR signaling and identified one in particular, phytanic acid, that is a very potent agonist. We show here that treatment of female BWF1 splenic macrophages with phytanic acid restores efferocytic activity via activation of the PPARγ and LXR signaling pathways. Furthermore, we found phytanic acid may restore female BWF1 macrophage efferocytosis through upregulation of the proefferocytic gene CD36. Taken together, our data indicate that metabolites produced by BWF1 male microbiota can enhance macrophage efferocytosis and, through this mechanism, could potentially influence lupus progression.
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Affiliation(s)
- James W Harder
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
| | - Jing Ma
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
| | - Pascale Alard
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
| | - Kevin J Sokoloski
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
| | - Edith Mathiowitz
- Department of Medical Science and Engineering, Brown University, 222 Richmond Street, Providence, RI 02903, USA
| | - Stacia Furtado
- Department of Medical Science and Engineering, Brown University, 222 Richmond Street, Providence, RI 02903, USA
| | - Nejat K Egilmez
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
| | - Michele M Kosiewicz
- Department of Microbiology and Immunology, University of Louisville, 505 South Hancock St, Rm 609, Louisville, KY 40202, USA
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11
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Dardenne C, Salon M, Authier H, Meunier E, AlaEddine M, Bernad J, Bouschbacher M, Lefèvre L, Pipy B, Coste A. Topical Aspirin Administration Improves Cutaneous Wound Healing in Diabetic Mice Through a Phenotypic Switch of Wound Macrophages Toward an Anti-inflammatory and Proresolutive Profile Characterized by LXA4 Release. Diabetes 2022; 71:2181-2196. [PMID: 35796692 DOI: 10.2337/db20-1245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 06/29/2022] [Indexed: 11/13/2022]
Abstract
Patients with diabetes present a persistent inflammatory process, leading to impaired wound healing. Since nonhealing diabetic wound management shows limited results, the introduction of advanced therapies targeting and correcting the inflammatory status of macrophages in chronic wounds could be an effective therapeutic strategy to stop the sustained inflammation and to return to a healing state. In an excisional skin injury in a diet-induced diabetic murine model, we demonstrate that topical administration of low-dose aspirin (36 μg/wound/day) improves cutaneous wound healing by increasing wound closure through the promotion of the inflammation resolution program of macrophages. This treatment increased efferocytosis of wound macrophages from aspirin-treated diabetic mice compared with untreated diabetic mice. We also show that aspirin treatment of high-fat-fed mice oriented the phenotype of wound macrophages toward an anti-inflammatory and proresolutive profile characterized by a decrease of LTB4 production. The use of diabetic mice deficient for 5-LOX or 12/15-LOX demonstrated that these two enzymes of acid arachidonic metabolism are essential for the beneficial effect of aspirin on wound healing. Thus, aspirin treatment modified the balance between pro- and anti-inflammatory eicosanoids by promoting the synthesis of proresolving LXA4 through 5-LOX, LTA4, 12/15-LOX signaling. In conclusion, the restoration of an anti-inflammatory and proresolutive phenotype of wound macrophages by the topical administration of low-dose aspirin represents a promising therapeutic approach in chronic wounds.
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Affiliation(s)
- Christophe Dardenne
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
| | - Marie Salon
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
- RESTORE Research Center, Université de Toulouse, INSERM, CNRS, EFS, Université Paul Sabatier, Toulouse, France
| | - Hélène Authier
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
- RESTORE Research Center, Université de Toulouse, INSERM, CNRS, EFS, Université Paul Sabatier, Toulouse, France
| | - Etienne Meunier
- UMR 5089, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France
| | - Mohamad AlaEddine
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
| | - José Bernad
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
| | | | - Lise Lefèvre
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
- RESTORE Research Center, Université de Toulouse, INSERM, CNRS, EFS, Université Paul Sabatier, Toulouse, France
| | - Bernard Pipy
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
| | - Agnès Coste
- UMR 152 PHARMA-DEV, Université de Toulouse, and Institut de Recherche pour le Développement, Université Paul Sabatier, Toulouse, France
- RESTORE Research Center, Université de Toulouse, INSERM, CNRS, EFS, Université Paul Sabatier, Toulouse, France
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12
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Cui TX, Brady AE, Zhang YJ, Fulton CT, Popova AP. Gelsolin Attenuates Neonatal Hyperoxia-Induced Inflammatory Responses to Rhinovirus Infection and Preserves Alveolarization. Front Immunol 2022; 13:792716. [PMID: 35173718 PMCID: PMC8842948 DOI: 10.3389/fimmu.2022.792716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 01/13/2022] [Indexed: 11/18/2022] Open
Abstract
Prematurity and bronchopulmonary dysplasia (BPD) increase the risk of asthma later in life. Supplemental oxygen therapy is a risk factor for chronic respiratory symptoms in infants with BPD. Hyperoxia induces cell injury and release of damage-associated molecular patterns (DAMPs). Cytoskeletal filamentous actin (F-actin) is a DAMP which binds Clec9a, a C-type lectin selectively expressed on CD103+ dendritic cells (DCs). Co-stimulation of Clec9a and TLR3 induces maximal proinflammatory responses. We have shown that neonatal hyperoxia (a model of BPD) increases lung IL-12+Clec9a+CD103+ DCs, pro-inflammatory responses and airway hyperreactivity following rhinovirus (RV) infection. CD103+ DCs and Clec9a are required for these responses. Hyperoxia increases F-actin levels in bronchoalveolar lavage fluid (BALF). We hypothesized that the F-actin severing protein gelsolin attenuates neonatal hyperoxia-induced Clec9a+CD103+ DC-dependent pro-inflammatory responses to RV and preserves alveolarization. We exposed neonatal mice to hyperoxia and treated them with gelsolin intranasally. Subsequently we inoculated the mice with RV intranasally. Alternatively, we inoculated normoxic neonatal mice with BALF from hyperoxia-exposed mice (hyperoxic BALF), RV and gelsolin. We analyzed lung gene expression two days after RV infection. For in vitro studies, lung CD11c+ cells were isolated from C57BL/6J or Clec9agfp-/- mice and incubated with hyperoxic BALF and RV. Cells were analyzed by flow cytometry. In neonatal mice, gelsolin blocked hyperoxia-induced Il12p40, TNF-α and IFN-γ mRNA and protein expression in response to RV infection. Similar effects were observed when gelsolin was co-administered with hyperoxic BALF and RV. Gelsolin decreased F-actin levels in hyperoxic BALF in vitro and inhibited hyperoxia-induced D103lo DC expansion and inflammation in vivo. Gelsolin also attenuated hyperoxia-induced hypoalveolarization. Further, incubation of lung CD11c+ cells from WT and Clec9agfp-/- mice with hyperoxic BALF and RV, showed Clec9a is required for maximal hyperoxic BALF and RV induced IL-12 expression in CD103+ DCs. Finally, in tracheal aspirates from mechanically ventilated human preterm infants the F-actin to gelsolin ratio positively correlates with FiO2, and gelsolin levels decrease during the first two weeks of mechanical ventilation. Collectively, our findings demonstrate a promising role for gelsolin, administered by inhalation into the airway to treat RV-induced exacerbations of BPD and prevent chronic lung disease.
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Affiliation(s)
- Tracy X. Cui
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Alexander E. Brady
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Ying-Jian Zhang
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Christina T. Fulton
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI, United States
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13
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Geng J, Liu Y, Dai H, Wang C. Fatty Acid Metabolism and Idiopathic Pulmonary Fibrosis. Front Physiol 2022; 12:794629. [PMID: 35095559 PMCID: PMC8795701 DOI: 10.3389/fphys.2021.794629] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
Fatty acid metabolism, including the de novo synthesis, uptake, oxidation, and derivation of fatty acids, plays several important roles at cellular and organ levels. Recent studies have identified characteristic changes in fatty acid metabolism in idiopathic pulmonary fibrosis (IPF) lungs, which implicates its dysregulation in the pathogenesis of this disorder. Here, we review the evidence for how fatty acid metabolism contributes to the development of pulmonary fibrosis, focusing on the profibrotic processes associated with specific types of lung cells, including epithelial cells, macrophages, and fibroblasts. We also summarize the potential therapeutics that target this metabolic pathway in treating IPF.
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Affiliation(s)
- Jing Geng
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Yuan Liu
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Huaping Dai
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China
- *Correspondence: Huaping Dai,
| | - Chen Wang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Chen Wang,
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14
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Lyu Y, Guo C, Zhang H. Fatty acid metabolism-related genes in bronchoalveolar lavage fluid unveil prognostic and immune infiltration in idiopathic pulmonary fibrosis. Front Endocrinol (Lausanne) 2022; 13:1001563. [PMID: 36267568 PMCID: PMC9576944 DOI: 10.3389/fendo.2022.1001563] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 09/21/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive condition with an unfavorable prognosis. A recent study has demonstrated that IPF patients exhibit characteristic alterations in the fatty acid metabolism in their lungs, suggesting an association with IPF pathogenesis. Therefore, in this study, we have explored whether the gene signature associated with fatty acid metabolism could be used as a reliable biological marker for predicting the survival of IPF patients. METHODS Data on the fatty acid metabolism-related genes (FAMRGs) were extracted from databases like Kyoto Encyclopedia of Genes and Genomes (KEGG), Hallmark, and Reactome pathway. The GSE70866 dataset with information on IPF patients was retrieved from the Gene Expression Omnibus (GEO). Next, the consensus clustering method was used to identify novel molecular subgroups. Gene Set Enrichment Analysis (GSEA) was performed to understand the mechanisms involved. The Cell-type Identification by Estimating Relative Subsets of RNA Transcripts (CIBERSORT) algorithm was used to evaluate the level of immune cell infiltration in the identified subgroups based on gene expression signatures of immune cells. Finally, the Least Absolute Shrinkage and Selection Operator (LASSO) regression and multivariate Cox regression analysis were performed to develop a prognostic risk model. RESULTS The gene expression signature associated with fatty acid metabolism was used to create two subgroups with significantly different prognoses. GSEA reveals that immune-related pathways were significantly altered between the two subgroups, and the two subgroups had different metabolic characteristics. High infiltration of immune cells, mainly activated NK cells, monocytes, and activated mast cells, was observed in the subgroup with a poor prognosis. A risk model based on FAMRGs had an excellent ability to predict the prognosis of IPF. The nomogram constructed using the clinical features and the risk model could accurately predict the prognosis of IPF patients. CONCLUSION The fatty acid metabolism-related gene expression signature could be used as a potential biological marker for predicting clinical outcomes and the level of infiltration of immune cells. This could eventually enhance the accuracy of the treatment of IPF patients.
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Affiliation(s)
- Yin Lyu
- Thoracic Surgery Laboratory, Xuzhou Medical University, Xuzhou, China
- Department of Thoracic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Chen Guo
- Thoracic Surgery Laboratory, Xuzhou Medical University, Xuzhou, China
- Department of Thoracic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Hao Zhang
- Thoracic Surgery Laboratory, Xuzhou Medical University, Xuzhou, China
- Department of Thoracic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Hao Zhang,
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15
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Gwak SY, Kim SJ, Park J, Kim SH, Joe Y, Lee HN, Kim W, Muna IA, Na HK, Chung HT, Surh YJ. Potential Role of Heme Oxygenase-1 in the Resolution of Experimentally Induced Colitis through Regulation of Macrophage Polarization. Gut Liver 2021; 16:246-258. [PMID: 34737242 PMCID: PMC8924814 DOI: 10.5009/gnl210058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/20/2021] [Accepted: 05/24/2021] [Indexed: 12/01/2022] Open
Abstract
Background/Aims Heme oxygenase-1 (HO-1) plays a central role in cellular defense against inflammatory insults, and its induction in macrophages potentiates their efferocytic activity. In this study, we explored the potential role of macrophage HO-1 in the resolution of experimentally induced colitis. Methods To induce colitis, male C57BL/6 mice were treated with 2% dextran sulfate sodium (DSS) in the drinking water for 7 days. To investigate efferocytosis, apoptotic colon epithelial CCD 841 CoN cells were coincubated with bone marrow-derived macrophages (BMDMs). Results Administration of the HO-1 inhibitor zinc protoporphyrin IX (ZnPP) blunted the resolution of DSS-induced intestinal inflammation and expression of the proresolving M2 macrophage marker CD206. BMDMs treated with apoptotic colonic epithelial cells showed significantly elevated expression of HO-1 and its regulator Nrf2. Under the same experimental conditions, the proportion of CD206-expressing macrophages was also enhanced. ZnPP treatment abrogated the upregulation of CD206 expression in BMDMs engulfing apoptotic colonic epithelial cells. This result was verified with BMDMs isolated from HO-1-knockout mice. BMDMs, when stimulated with lipopolysaccharide, exhibited increased expression of CD86, a marker of M1 macrophages. Coculture of lipopolysaccharide-stimulated BMDMs with apoptotic colonic epithelial cell debris dampened the expression of CD86 as well as the pro-inflammatory cytokines in an HO-1-dependent manner. Genetic ablation as well as pharmacologic inhibition of HO-1 significantly reduced the proportion of efferocytic BMDMs expressing the scavenger receptor CD36. Conclusions HO-1 plays a key role in the resolution of experimentally induced colitis by modulating the polarization of macrophages.
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Affiliation(s)
- Shin-Young Gwak
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul, Korea
| | - Su-Jung Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Jeongmin Park
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Seung Hyeon Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Yeonsoo Joe
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Ha-Na Lee
- Laboratory of Immunology, Division of Biotechnology Review and Research-III, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD
| | - Wonki Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Ishrat Aklima Muna
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Hye-Kyung Na
- Department of Food Science and Biotechnology, College of Knowledge-Based Services Engineering, Sungshin Women's University, Seoul, Korea
| | - Hun Taeg Chung
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Young-Joon Surh
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul, Korea.,Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea.,Cancer Research Institute, Seoul National University, Seoul, Korea
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16
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Cui TX, Fulton CT, Brady AE, Zhang YJ, Goldsmith AM, Popova AP. Lung CD103 +dendritic cells and Clec9a signaling are required for neonatal hyperoxia-induced inflammatory responses to rhinovirus infection. Am J Physiol Lung Cell Mol Physiol 2021; 320:L193-L204. [PMID: 33112186 PMCID: PMC7948088 DOI: 10.1152/ajplung.00334.2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/14/2020] [Accepted: 10/23/2020] [Indexed: 11/22/2022] Open
Abstract
Premature infants, especially those with bronchopulmonary dysplasia (BPD), develop recurrent severe respiratory viral illnesses. We have shown that hyperoxic exposure of immature mice, a model of BPD, increases lung IL-12-producing Clec9a+ CD103+ dendritic cells (DCs), pro-inflammatory responses, and airway hyperreactivity following rhinovirus (RV) infection. However, the requirement for CD103+ DCs and Clec9a, a DAMP receptor that binds necrotic cell cytoskeletal filamentous actin (F-actin), for RV-induced inflammatory responses has not been demonstrated. To test this, 2-day-old C57BL/6J, CD103+ DC-deficient Batf3-/- or Clec9agfp-/- mice were exposed to normoxia or hyperoxia for 14 days. Also, selected mice were treated with neutralizing antibody against CD103. Immediately after hyperoxia, the mice were inoculated with RV intranasally. We found that compared with wild-type mice, hyperoxia-exposed Batf3-/- mice showed reduced levels of IL-12p40, IFN-γ, and TNF-α, fewer IFN-γ-producing CD4+ T cells, and decreased airway responsiveness following RV infection. Similar effects were observed in anti-CD103-treated and Clec9agfp-/- mice. Furthermore, hyperoxia increased airway dead cell number and extracellular F-actin levels. Finally, studies in preterm infants with respiratory distress syndrome showed that tracheal aspirate CLEC9A expression positively correlated with IL12B expression, consistent with the notion that CLEC9A+ cells are responsible for IL-12 production in humans as well as mice. We conclude that CD103+ DCs and Clec9a are required for hyperoxia-induced pro-inflammatory responses to RV infection. In premature infants, Clec9a-mediated activation of CD103+ DCs may promote pro-inflammatory responses to viral infection, thereby driving respiratory morbidity.
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MESH Headings
- Animals
- Animals, Newborn
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Basic-Leucine Zipper Transcription Factors/physiology
- Dendritic Cells/immunology
- Female
- Humans
- Hyperoxia/physiopathology
- Infant, Newborn
- Infant, Premature/immunology
- Integrin alpha Chains/genetics
- Integrin alpha Chains/metabolism
- Lectins, C-Type/physiology
- Lung/immunology
- Lung/metabolism
- Lung/pathology
- Lung/virology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Picornaviridae Infections/complications
- Picornaviridae Infections/virology
- Pneumonia/immunology
- Pneumonia/virology
- Receptors, Immunologic/physiology
- Repressor Proteins/physiology
- Respiratory Distress Syndrome, Newborn/immunology
- Respiratory Distress Syndrome, Newborn/metabolism
- Respiratory Distress Syndrome, Newborn/pathology
- Rhinovirus/isolation & purification
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Affiliation(s)
- Tracy X Cui
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
| | - Christina T Fulton
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
| | - Alexander E Brady
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
| | - Ying-Jian Zhang
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
| | - Adam M Goldsmith
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
| | - Antonia P Popova
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan
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17
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The Lipid Receptor G2A (GPR132) Mediates Macrophage Migration in Nerve Injury-Induced Neuropathic Pain. Cells 2020; 9:cells9071740. [PMID: 32708184 PMCID: PMC7409160 DOI: 10.3390/cells9071740] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/15/2020] [Accepted: 07/18/2020] [Indexed: 12/17/2022] Open
Abstract
Nerve injury-induced neuropathic pain is difficult to treat and mechanistically characterized by strong neuroimmune interactions, involving signaling lipids that act via specific G-protein coupled receptors. Here, we investigated the role of the signaling lipid receptor G2A (GPR132) in nerve injury-induced neuropathic pain using the robust spared nerve injury (SNI) mouse model. We found that the concentrations of the G2A agonist 9-HODE (9-Hydroxyoctadecadienoic acid) are strongly increased at the site of nerve injury during neuropathic pain. Moreover, G2A-deficient mice show a strong reduction of mechanical hypersensitivity after nerve injury. This phenotype is accompanied by a massive reduction of invading macrophages and neutrophils in G2A-deficient mice and a strongly reduced release of the proalgesic mediators TNFα, IL-6 and VEGF at the site of injury. Using a global proteome analysis to identify the underlying signaling pathways, we found that G2A activation in macrophages initiates MyD88-PI3K-AKT signaling and transient MMP9 release to trigger cytoskeleton remodeling and migration. We conclude that G2A-deficiency reduces inflammatory responses by decreasing the number of immune cells and the release of proinflammatory cytokines and growth factors at the site of nerve injury. Inhibiting the G2A receptor after nerve injury may reduce immune cell-mediated peripheral sensitization and may thus ameliorate neuropathic pain.
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18
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Frégeau G, Sarduy R, Elimam H, Esposito CL, Mellal K, Ménard L, Leitão da Graça SD, Proulx C, Zhang J, Febbraio M, Soto Y, Lubell WD, Ong H, Marleau S. Atheroprotective and atheroregressive potential of azapeptide derivatives of GHRP-6 as selective CD36 ligands in apolipoprotein E-deficient mice. Atherosclerosis 2020; 307:52-62. [PMID: 32721647 DOI: 10.1016/j.atherosclerosis.2020.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND AIMS Scavenger receptor class B member 3, also known as cluster of differentiation-36 (CD36) receptor, is involved in the uptake and accumulation of modified lipoprotein in macrophages, driving atherosclerosis progression. Azapeptide analogs of growth hormone-releasing peptide-6 (GHRP-6) have been developed as selective CD36 ligands and evaluated for their anti-atherosclerotic properties in apoe-/- mice. METHODS From 4 to 19 weeks of age, male apoe-/- mice were fed a high fat high cholesterol (HFHC) diet, then switched to normal chow and treated daily with 300 nmol/kg of MPE-001 ([aza-Tyr4]-GHRP-6) or MPE-003 ([aza-(N,N-diallylaminobut-2-ynyl)Gly4]-GHRP-6) for 9 weeks. In another protocol, mice were fed a HFHC diet throughout the study. RESULTS Azapeptides decreased lesion progression in the aortic arch and reduced aortic sinus lesion areas below pre-existing lesions levels in apoe-/- mice which were switched to chow diet. In mice fed a HFHC throughout the study, azapeptides reduced lesion progression in the aortic vessel and sinus. The anti-atherosclerotic effect of azapeptides was associated with a reduced ratio of iNOS+/CD206+ macrophages within lesions, and lowered plasma inflammatory cytokine levels. Monocytes from azapeptide-treated mice showed altered mitochondrial oxygen consumption rates, consistent with an M2-like phenotype. These effects were dependent on CD36, and not observed in apoe-/-cd36-/- mice. CONCLUSIONS Azapeptides MPE-001 and MPE-003 diminished aortic lesion progression and reduced, below pre-existing levels, lesions in the aortic sinus of atherosclerotic mice. A relative increase of M2-like macrophages was observed in lesions, associated with reduced systemic inflammation. Development of CD36-selective azapeptide ligands merits consideration for treating atherosclerotic disease.
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Affiliation(s)
- Geneviève Frégeau
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - Roger Sarduy
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - Hanan Elimam
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada; Department of Biochemistry, Faculty of Pharmacy, University of Sadat City, Sadat City, Egypt
| | - Cloé L Esposito
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - Katia Mellal
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - Liliane Ménard
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | | | - Caroline Proulx
- Department of Chemistry, Université de Montréal, Montréal, Québec, Canada
| | - Jinqiang Zhang
- Department of Chemistry, Université de Montréal, Montréal, Québec, Canada
| | - Maria Febbraio
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Yosdel Soto
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - William D Lubell
- Department of Chemistry, Université de Montréal, Montréal, Québec, Canada
| | - Huy Ong
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada
| | - Sylvie Marleau
- Faculty of Pharmacy, Université de Montréal, Montréal, Québec, Canada.
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19
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Lipid Mediators Regulate Pulmonary Fibrosis: Potential Mechanisms and Signaling Pathways. Int J Mol Sci 2020; 21:ijms21124257. [PMID: 32549377 PMCID: PMC7352853 DOI: 10.3390/ijms21124257] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/12/2020] [Accepted: 06/12/2020] [Indexed: 02/06/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease of unknown etiology characterized by distorted distal lung architecture, inflammation, and fibrosis. The molecular mechanisms involved in the pathophysiology of IPF are incompletely defined. Several lung cell types including alveolar epithelial cells, fibroblasts, monocyte-derived macrophages, and endothelial cells have been implicated in the development and progression of fibrosis. Regardless of the cell types involved, changes in gene expression, disrupted glycolysis, and mitochondrial oxidation, dysregulated protein folding, and altered phospholipid and sphingolipid metabolism result in activation of myofibroblast, deposition of extracellular matrix proteins, remodeling of lung architecture and fibrosis. Lipid mediators derived from phospholipids, sphingolipids, and polyunsaturated fatty acids play an important role in the pathogenesis of pulmonary fibrosis and have been described to exhibit pro- and anti-fibrotic effects in IPF and in preclinical animal models of lung fibrosis. This review describes the current understanding of the role and signaling pathways of prostanoids, lysophospholipids, and sphingolipids and their metabolizing enzymes in the development of lung fibrosis. Further, several of the lipid mediators and enzymes involved in their metabolism are therapeutic targets for drug development to treat IPF.
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20
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Boada-Romero E, Martinez J, Heckmann BL, Green DR. The clearance of dead cells by efferocytosis. Nat Rev Mol Cell Biol 2020; 21:398-414. [PMID: 32251387 DOI: 10.1038/s41580-020-0232-1] [Citation(s) in RCA: 379] [Impact Index Per Article: 94.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2020] [Indexed: 02/06/2023]
Abstract
Multiple modes of cell death have been identified, each with a unique function and each induced in a setting-dependent manner. As billions of cells die during mammalian embryogenesis and daily in adult organisms, clearing dead cells and associated cellular debris is important in physiology. In this Review, we present an overview of the phagocytosis of dead and dying cells, a process known as efferocytosis. Efferocytosis is performed by macrophages and to a lesser extent by other 'professional' phagocytes (such as monocytes and dendritic cells) and 'non-professional' phagocytes, such as epithelial cells. Recent discoveries have shed light on this process and how it functions to maintain tissue homeostasis, tissue repair and organismal health. Here, we outline the mechanisms of efferocytosis, from the recognition of dying cells through to phagocytic engulfment and homeostatic resolution, and highlight the pathophysiological consequences that can arise when this process is abrogated.
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Affiliation(s)
- Emilio Boada-Romero
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jennifer Martinez
- Inflammation & Autoimmunity Group, National Institute for Environmental Health Sciences, Research Triangle Park, Durham, NC, USA
| | - Bradlee L Heckmann
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA.
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA.
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21
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Plosa EJ, Benjamin JT, Sucre JM, Gulleman PM, Gleaves LA, Han W, Kook S, Polosukhin VV, Haake SM, Guttentag SH, Young LR, Pozzi A, Blackwell TS, Zent R. β1 Integrin regulates adult lung alveolar epithelial cell inflammation. JCI Insight 2020; 5:129259. [PMID: 31873073 PMCID: PMC7098727 DOI: 10.1172/jci.insight.129259] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 12/12/2019] [Indexed: 01/04/2023] Open
Abstract
Integrins, the extracellular matrix receptors that facilitate cell adhesion and migration, are necessary for organ morphogenesis; however, their role in maintaining adult tissue homeostasis is poorly understood. To define the functional importance of β1 integrin in adult mouse lung, we deleted it after completion of development in type 2 alveolar epithelial cells (AECs). Aged β1 integrin-deficient mice exhibited chronic obstructive pulmonary disease-like (COPD-like) pathology characterized by emphysema, lymphoid aggregates, and increased macrophage infiltration. These histopathological abnormalities were preceded by β1 integrin-deficient AEC dysfunction such as excessive ROS production and upregulation of NF-κB-dependent chemokines, including CCL2. Genetic deletion of the CCL2 receptor, Ccr2, in mice with β1 integrin-deficient type 2 AECs impaired recruitment of monocyte-derived macrophages and resulted in accelerated inflammation and severe premature emphysematous destruction. The lungs exhibited reduced AEC efferocytosis and excessive numbers of inflamed type 2 AECs, demonstrating the requirement for recruited monocytes/macrophages in limiting lung injury and remodeling in the setting of a chronically inflamed epithelium. These studies support a critical role for β1 integrin in alveolar homeostasis in the adult lung.
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Affiliation(s)
| | | | | | | | - Linda A. Gleaves
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, and
| | - Wei Han
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, and
| | | | - Vasiliy V. Polosukhin
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, and
| | - Scott M. Haake
- Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Nashville Veterans Affairs Medical Center, Nashville, Tennessee, USA
| | | | - Lisa R. Young
- Division of Pulmonary Medicine, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Ambra Pozzi
- Nashville Veterans Affairs Medical Center, Nashville, Tennessee, USA.,Division of Nephrology and Hypertension, Department of Medicine,,Department of Molecular Physiology and Biophysics, and
| | - Timothy S. Blackwell
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, and,Nashville Veterans Affairs Medical Center, Nashville, Tennessee, USA.,Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Roy Zent
- Nashville Veterans Affairs Medical Center, Nashville, Tennessee, USA.,Division of Nephrology and Hypertension, Department of Medicine,,Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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22
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Negreiros-Lima GL, Lima KM, Moreira IZ, Jardim BLO, Vago JP, Galvão I, Teixeira LCR, Pinho V, Teixeira MM, Sugimoto MA, Sousa LP. Cyclic AMP Regulates Key Features of Macrophages via PKA: Recruitment, Reprogramming and Efferocytosis. Cells 2020; 9:cells9010128. [PMID: 31935860 PMCID: PMC7017228 DOI: 10.3390/cells9010128] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/29/2019] [Accepted: 01/01/2020] [Indexed: 12/14/2022] Open
Abstract
Macrophages are central to inflammation resolution, an active process aimed at restoring tissue homeostasis following an inflammatory response. Here, the effects of db-cAMP on macrophage phenotype and function were investigated. Injection of db-cAMP into the pleural cavity of mice induced monocytes recruitment in a manner dependent on PKA and CCR2/CCL2 pathways. Furthermore, db-cAMP promoted reprogramming of bone-marrow-derived macrophages to a M2 phenotype as seen by increased Arg-1/CD206/Ym-1 expression and IL-10 levels (M2 markers). Db-cAMP also showed a synergistic effect with IL-4 in inducing STAT-3 phosphorylation and Arg-1 expression. Importantly, db-cAMP prevented IFN-γ/LPS-induced macrophage polarization to M1-like as shown by increased Arg-1 associated to lower levels of M1 cytokines (TNF-α/IL-6) and p-STAT1. In vivo, db-cAMP reduced the number of M1 macrophages induced by LPS injection without changes in M2 and Mres numbers. Moreover, db-cAMP enhanced efferocytosis of apoptotic neutrophils in a PKA-dependent manner and increased the expression of Annexin A1 and CD36, two molecules associated with efferocytosis. Finally, inhibition of endogenous PKA during LPS-induced pleurisy impaired the physiological resolution of inflammation. Taken together, the results suggest that cAMP is involved in the major functions of macrophages, such as nonphlogistic recruitment, reprogramming and efferocytosis, all key processes for inflammation resolution.
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Affiliation(s)
- Graziele L. Negreiros-Lima
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.L.N.-L.); (I.Z.M.); (B.L.O.J.); (L.C.R.T.)
| | - Kátia M. Lima
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Isabella Z. Moreira
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.L.N.-L.); (I.Z.M.); (B.L.O.J.); (L.C.R.T.)
| | - Bruna Lorrayne O. Jardim
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.L.N.-L.); (I.Z.M.); (B.L.O.J.); (L.C.R.T.)
| | - Juliana P. Vago
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (J.P.V.); (M.M.T.)
| | - Izabela Galvão
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (I.G.); (V.P.)
| | - Lívia Cristina R. Teixeira
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.L.N.-L.); (I.Z.M.); (B.L.O.J.); (L.C.R.T.)
| | - Vanessa Pinho
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (I.G.); (V.P.)
| | - Mauro M. Teixeira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (J.P.V.); (M.M.T.)
| | - Michelle A. Sugimoto
- Programa de Pós-Graduação em Doenças Infecciosas e Medicina Tropical, Escola de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Brazil;
| | - Lirlândia P. Sousa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.L.N.-L.); (I.Z.M.); (B.L.O.J.); (L.C.R.T.)
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil;
- Correspondence: ; Tel.: +55-31-3409-6883
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23
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Suresh MV, Dolgachev VA, Zhang B, Balijepalli S, Swamy S, Mooliyil J, Kralovich G, Thomas B, Machado-Aranda D, Karmakar M, Lalwani S, Subramanian A, Anantharam A, Moore BB, Raghavendran K. TLR3 absence confers increased survival with improved macrophage activity against pneumonia. JCI Insight 2019; 4:131195. [PMID: 31801911 DOI: 10.1172/jci.insight.131195] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 10/17/2019] [Indexed: 12/14/2022] Open
Abstract
Toll-like receptor 3 (TLR3) is a pathogen recognition molecule associated with viral infection with double-stranded RNA (dsRNA) as its ligand. We evaluated the role of TLR3 in bacterial pneumonia using Klebsiella pneumoniae (KP). WT and TLR3-/- mice were subjected to a lethal model of KP. Alveolar macrophage polarization, bactericidal activity, and phagocytic capacity were compared. RNA-sequencing was performed on alveolar macrophages from the WT and TLR3-/- mice. Adoptive transfers of alveolar macrophages from TLR3-/- mice to WT mice with KP were evaluated for survival. Expression of TLR3 in postmortem human lung samples from patients who died from gram-negative pneumonia and pathological grading of pneumonitis was determined. Mortality was significantly lower in TLR3-/-, and survival improved in WT mice following antibody neutralization of TLR3 and with TLR3/dsRNA complex inhibitor. Alveolar macrophages from TLR3-/- mice demonstrated increased bactericidal and phagocytic capacity. RNA-sequencing showed an increased production of chemokines in TLR3-/- mice. Adoptive transfer of alveolar macrophages from the TLR3-/- mice restored the survival in WT mice. Human lung samples demonstrated a good correlation between the grade of pneumonitis and TLR3 expression. These data represent a paradigm shift in understanding the mechanistic role of TLR3 in bacterial pneumonia.
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Affiliation(s)
| | | | - Boya Zhang
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Samantha Swamy
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Jashitha Mooliyil
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Georgia Kralovich
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Bivin Thomas
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Monita Karmakar
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Sanjeev Lalwani
- Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Arulselvi Subramanian
- Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi, India
| | | | - Bethany B Moore
- Department of Medicine, University of Michigan, Ann Arbor, Michigan, USA
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24
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Chu SG, Villalba JA, Liang X, Xiong K, Tsoyi K, Ith B, Ayaub EA, Tatituri RV, Byers DE, Hsu FF, El-Chemaly S, Kim EY, Shi Y, Rosas IO. Palmitic Acid-Rich High-Fat Diet Exacerbates Experimental Pulmonary Fibrosis by Modulating Endoplasmic Reticulum Stress. Am J Respir Cell Mol Biol 2019; 61:737-746. [PMID: 31461627 PMCID: PMC6890409 DOI: 10.1165/rcmb.2018-0324oc] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/24/2019] [Indexed: 12/11/2022] Open
Abstract
The impact of lipotoxicity on the development of lung fibrosis is unclear. Saturated fatty acids, such as palmitic acid (PA), activate endoplasmic reticulum (ER) stress, a cellular stress response associated with the development of idiopathic pulmonary fibrosis (IPF). We tested the hypothesis that PA increases susceptibility to lung epithelial cell death and experimental fibrosis by modulating ER stress. Total liquid chromatography and mass spectrometry were used to measure fatty acid content in IPF lungs. Wild-type mice were fed a high-fat diet (HFD) rich in PA or a standard diet and subjected to bleomycin-induced lung injury. Lung fibrosis was determined by hydroxyproline content. Mouse lung epithelial cells were treated with PA. ER stress and cell death were assessed by Western blotting, TUNEL staining, and cell viability assays. IPF lungs had a higher level of PA compared with controls. Bleomycin-exposed mice fed an HFD had significantly increased pulmonary fibrosis associated with increased cell death and ER stress compared with those fed a standard diet. PA increased apoptosis and activation of the unfolded protein response in lung epithelial cells. This was attenuated by genetic deletion and chemical inhibition of CD36, a fatty acid transporter. In conclusion, consumption of an HFD rich in saturated fat increases susceptibility to lung fibrosis and ER stress, and PA mediates lung epithelial cell death and ER stress via CD36. These findings demonstrate that lipotoxicity may have a significant impact on the development of lung injury and fibrosis by enhancing pro-death ER stress pathways.
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Affiliation(s)
- Sarah G. Chu
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Julian A. Villalba
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
- Department of Pathology, Massachusetts General Hospital, and
- Pulmonary Fibrosis Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico; and
| | - Xiaoliang Liang
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Kevin Xiong
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Konstantin Tsoyi
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Bonna Ith
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Ehab A. Ayaub
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Raju V. Tatituri
- Division of Rheumatology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - Fong-Fu Hsu
- Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, Missouri
| | - Souheil El-Chemaly
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
| | - Edy Y. Kim
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
- Department of Pathology, Massachusetts General Hospital, and
| | - Yuanyuan Shi
- Pulmonary Fibrosis Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico; and
| | - Ivan O. Rosas
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital
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25
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Living on the Edge: Efferocytosis at the Interface of Homeostasis and Pathology. Immunity 2019; 50:1149-1162. [PMID: 31117011 DOI: 10.1016/j.immuni.2019.04.018] [Citation(s) in RCA: 211] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/13/2019] [Accepted: 04/29/2019] [Indexed: 01/23/2023]
Abstract
Nearly every tissue in the body undergoes routine turnover of cells as part of normal healthy living. The majority of these cells undergoing turnover die via apoptosis, and then are rapidly removed by phagocytes by the process of efferocytosis that is anti-inflammatory. However, a number of pathologies have recently been linked to defective clearance of apoptotic cells. Perturbed clearance arises for many reasons, including overwhelming of the clearance machinery, disruptions at different stages of efferocytosis, and responses of phagocytes during efferocytosis, all of which can alter the homeostatic tissue environment. This review covers linkages of molecules involved in the different phases of efferocytosis to disease pathologies that can arise due to their loss or altered function.
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26
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Brown M, Ahmed S. Emerging role of proprotein convertase subtilisin/kexin type-9 (PCSK-9) in inflammation and diseases. Toxicol Appl Pharmacol 2019; 370:170-177. [PMID: 30914377 DOI: 10.1016/j.taap.2019.03.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 03/21/2019] [Accepted: 03/22/2019] [Indexed: 12/17/2022]
Abstract
Proprotein convertase subtilisin/kexin type-9 (PCSK9) is most recognized serine protease for its role in cardiovascular diseases (CVD). PCSK9 regulates plasma low-density lipoprotein cholesterol (LDL-C) levels by selectively targeting hepatic LDL receptors (LDLR) for degradation, thereby serving as a potential therapeutic target for CVD. New pharmacological agents under development aim to lower the risk of CVD by inhibiting PCSK9 extracellularly, although secondary effects of this approach are not yet studied. Here we review the history of PCSK9 and rationale behind developing inhibitors for CVD. Importantly, we summarized the studies investigating the role and impact of modulated PCSK9 levels in inflammation, specifically in sepsis, rheumatoid arthritis and other chronic inflammatory conditions. Furthermore, we summarized studies that investigated the interactions of PCSK9 with pro-inflammatory pathways, such as scavenger receptor CD36 and thrombospondin 1 (TSP-1) in inflammatory diseases. This review highlights the conflicting role that PCSK9 plays in different inflammatory disease states and postulates that any unwanted effects of PCSK9 inhibition in early clinical testing should critically be examined.
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Affiliation(s)
- Madalyn Brown
- Department of Pharmaceutical Sciences, Washington State University College of Pharmacy, Spokane, WA, USA
| | - Salahuddin Ahmed
- Department of Pharmaceutical Sciences, Washington State University College of Pharmacy, Spokane, WA, USA; Division of Rheumatology, University of Washington School of Medicine, Seattle, WA, USA.
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27
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Hou X, Summer R, Chen Z, Tian Y, Ma J, Cui J, Hao X, Guo L, Xu H, Wang H, Liu H. Lipid Uptake by Alveolar Macrophages Drives Fibrotic Responses to Silica Dust. Sci Rep 2019; 9:399. [PMID: 30674959 PMCID: PMC6344530 DOI: 10.1038/s41598-018-36875-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022] Open
Abstract
Silicosis is a common occupational disease and represents a significant contributor to respiratory morbidity and mortality worldwide. Lipid-laden macrophages, or foam cells, are observed in the lungs of patients with silicosis but the mechanisms mediating their formation remain poorly understood. In this study, we sought to elucidate the mechanisms by which silica promotes foam cell formation in the lung, and to determine whether uptake of lipids alone is sufficient to drive TGF-β production by alveolar macrophages. Consistent with previous reports, we found that foam cells were markedly increased in the lungs of patients with silicosis and that these findings associated with both higher levels of intracellular lipid levels (oxidized LDL, ox-LDL) and elevated transcript levels for the lipid scavenger receptor CD36 and the nuclear receptor PPARγ. Employing a rat alveolar macrophage cell line, we found that exposure to silica dust or ox-LDL alone had a modest effect on the induction of foam cell formation and only silica was capable of inducing the production of TGF-β. In contrast, foam cell formation and TGF-β production were both dramatically increased when cells were exposed to a combination of silica dust and ox-LDL. Moreover, we found that these endpoints were markedly attenuated by either blocking CD36 or inhibiting the activity of PPARγ. Altogether, our findings suggest that foam cell formation and TGF-β production are driven by the simultaneous uptake of silica and lipids in alveolar macrophages and that strategies aimed at blocking lipid uptake by alveolar macrophages might be effective in ameliorating fibrotic responses to silica in the lung.
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Affiliation(s)
- Xiaomin Hou
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Ross Summer
- Center for Translational Medicine and Jane and Leonard Korman Lung Center, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Ziying Chen
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Ying Tian
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Jingjing Ma
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Jie Cui
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Xiaohui Hao
- Medical Research Center, Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Lingli Guo
- Medical Research Center, Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Hong Xu
- Center for Translational Medicine and Jane and Leonard Korman Lung Center, Thomas Jefferson University, Philadelphia, PA, 19107, USA.,Medical Research Center, Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Hongli Wang
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China.
| | - Heliang Liu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China. .,Medical Research Center, Health, North China University of Science and Technology, Tangshan, Hebei, 063210, China.
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28
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Kim KK, Dotson MR, Agarwal M, Yang J, Bradley PB, Subbotina N, Osterholzer JJ, Sisson TH. Efferocytosis of apoptotic alveolar epithelial cells is sufficient to initiate lung fibrosis. Cell Death Dis 2018; 9:1056. [PMID: 30333529 PMCID: PMC6193049 DOI: 10.1038/s41419-018-1074-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 09/14/2018] [Accepted: 09/21/2018] [Indexed: 12/30/2022]
Abstract
Type II alveolar epithelial cell (AEC) apoptosis is a prominent feature of fibrotic lung diseases and animal models of pulmonary fibrosis. While there is growing recognition of the importance of AEC injury and apoptosis as a causal factor in fibrosis, the underlying mechanisms that link these processes remain unknown. We have previously shown that targeting the type II alveolar epithelium for injury by repetitively administering diphtheria toxin to transgenic mice expressing the diphtheria toxin receptor off of the surfactant protein C promoter (SPC-DTR) develop lung fibrosis, confirming that AEC injury is sufficient to cause fibrosis. In the present study, we find that SPC-DTR mice develop increased activation of caspase 3/7 after initiation of diphtheria toxin treatment consistent with apoptosis within AECs. We also find evidence of efferocytosis, the uptake of apoptotic cells, by alveolar macrophages in this model. To determine the importance of efferocytosis in lung fibrosis, we treated cultured alveolar macrophages with apoptotic type II AECs and found that the uptake induced pro-fibrotic gene expression. We also found that the repetitive intrapulmonary administration of apoptotic type II AEC or MLE-12 cells induces lung fibrosis. Finally, mice lacking a key efferocytosis receptor, CD36, developed attenuated fibrosis in response to apoptotic MLE-12 cells. Collectively, these studies support a novel mechanism linking AEC apoptosis with macrophage pro-fibrotic activation via efferocytosis and reveal previously unrecognized therapeutic targets.
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Affiliation(s)
- Kevin K Kim
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Megan R Dotson
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Manisha Agarwal
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Jibing Yang
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Patrick B Bradley
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Natalia Subbotina
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - John J Osterholzer
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Thomas H Sisson
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
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29
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Kern K, Schäfer SMG, Cohnen J, Pierre S, Osthues T, Tarighi N, Hohmann S, Ferreiros N, Brüne B, Weigert A, Geisslinger G, Sisignano M, Scholich K. The G2A Receptor Controls Polarization of Macrophage by Determining Their Localization Within the Inflamed Tissue. Front Immunol 2018; 9:2261. [PMID: 30327654 PMCID: PMC6174245 DOI: 10.3389/fimmu.2018.02261] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/11/2018] [Indexed: 12/17/2022] Open
Abstract
Macrophages are highly versatile cells, which acquire, depending on their microenvironment, pro- (M1-like), or antiinflammatory (M2-like) phenotypes. Here, we studied the role of the G-protein coupled receptor G2A (GPR132), in chemotactic migration and polarization of macrophages, using the zymosan-model of acute inflammation. G2A-deficient mice showed a reduced zymosan-induced thermal hyperalgesia, which was reversed after macrophage depletion. Fittingly, the number of M1-like macrophages was reduced in the inflamed tissue in G2A-deficient mice. However, G2A activation was not sufficient to promote M1-polarization in bone marrow-derived macrophages. While the number of monocyte-derived macrophages in the inflamed paw was not altered, G2A-deficient mice had less macrophages in the direct vicinity of the origin of inflammation, an area marked by the presence of zymosan, neutrophil accumulation and proinflammatory cytokines. Fittingly neutrophil efferocytosis was decreased in G2A-deficient mice and several lipids, which are released by neutrophils and promote G2A-mediated chemotaxis, were increased in the inflamed tissue. Taken together, G2A is necessary to position macrophages in the proinflammatory microenvironment surrounding the center of inflammation. In absence of G2A the macrophages are localized in an antiinflammatory microenvironment and macrophage polarization is shifted toward M2-like macrophages.
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Affiliation(s)
- Katharina Kern
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Stephan M G Schäfer
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Jennifer Cohnen
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Sandra Pierre
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Tabea Osthues
- Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
| | - Neda Tarighi
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Stefan Hohmann
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Nerea Ferreiros
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Bernhard Brüne
- Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany.,Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Andreas Weigert
- Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Gerd Geisslinger
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany.,Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
| | - Marco Sisignano
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Klaus Scholich
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany.,Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
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30
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Schniering J, Guo L, Brunner M, Schibli R, Ye S, Distler O, Béhé M, Maurer B. Evaluation of 99mTc-rhAnnexin V-128 SPECT/CT as a diagnostic tool for early stages of interstitial lung disease associated with systemic sclerosis. Arthritis Res Ther 2018; 20:183. [PMID: 30115119 PMCID: PMC6097327 DOI: 10.1186/s13075-018-1681-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 07/20/2018] [Indexed: 12/15/2022] Open
Abstract
Background Given the need for early detection of organ involvement in systemic sclerosis, we evaluated 99mTc-rhAnnexin V-128 for the detection of early stages of interstitial lung disease (ILD) in respective animal models using single photon emission computed tomography (SPECT/CT). Methods In bleomycin (BLM)-challenged mice, fos-related antigen 2 (Fra-2) transgenic (tg) mice and respective controls, lung injury was evaluated by analysis of hematoxylin and eosin (HE) and Sirius red staining, with semi-quantification of fibrosis by the Ashcroft score. Apoptotic cells were identified by TUNEL assay, cleaved caspase 3 staining and double staining with specific cell markers. To detect early stages of lung remodeling by visualization of apoptosis, mice were injected intravenously with 99mTc-rhAnnexin V-128 and imaged by small animal SPECT/CT. For confirmation, biodistribution and ex vivo autoradiography studies were performed. Results In BLM-induced lung fibrosis, inflammatory infiltrates occurred as early as day 3 with peak at day 7, whereas pulmonary fibrosis developed from day 7 and was most pronounced at day 21. In accordance, the number of apoptotic cells was highest at day 3 compared with saline controls and then decreased over time. Epithelial cells (E-cadherin+) and inflammatory cells (CD45+) were the primary cells undergoing apoptosis in the earliest remodeling stages of experimental ILD. This was also true in the pathophysiologically different Fra-2 tg mice, where apoptosis of CD45+ cells occurred in the inflammatory stage. In accordance with the findings on tissue level, at day 3 in the BLM and at week 16 in the Fra-2 tg model, biodistribution and/or ex vivo autoradiography showed increased pulmonary uptake of 99mTc-rhAnnexin V-128 compared with controls. However, accumulation of the radiotracer and thus the signal intensity in lungs was too low to allow the differentiation of healthy and injured lungs in vivo. Conclusion At the tissue level, 99mTc-rhAnnexin V-128 successfully demonstrated early stages of ILD in two animal models by detection of apoptotic epithelial and/or inflammatory cells. In vivo, however, we did not detect early lung injury. It remains to be investigated whether the same applies to human ILD. Electronic supplementary material The online version of this article (10.1186/s13075-018-1681-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Janine Schniering
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland
| | - Li Guo
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland.,Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Matthias Brunner
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland
| | - Roger Schibli
- Center for Radiopharmaceutical Sciences, Villigen-PSI, Switzerland.,Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, Zurich, Switzerland
| | - Shuang Ye
- Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Oliver Distler
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland
| | - Martin Béhé
- Center for Radiopharmaceutical Sciences, Villigen-PSI, Switzerland
| | - Britta Maurer
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland.
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31
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Heinzelmann K, Lehmann M, Gerckens M, Noskovičová N, Frankenberger M, Lindner M, Hatz R, Behr J, Hilgendorff A, Königshoff M, Eickelberg O. Cell-surface phenotyping identifies CD36 and CD97 as novel markers of fibroblast quiescence in lung fibrosis. Am J Physiol Lung Cell Mol Physiol 2018; 315:L682-L696. [PMID: 29952218 DOI: 10.1152/ajplung.00439.2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Fibroblasts play an important role in lung homeostasis and disease. In lung fibrosis, fibroblasts adopt a proliferative and migratory phenotype, with increased expression of α-smooth muscle actin (αSMA) and enhanced secretion of extracellular matrix components. Comprehensive profiling of fibroblast heterogeneity is limited because of a lack of specific cell-surface markers. We have previously profiled the surface proteome of primary human lung fibroblasts. Here, we sought to define and quantify a panel of cluster of differentiation (CD) markers in primary human lung fibroblasts and idiopathic pulmonary fibrosis (IPF) lung tissue, using immunofluorescence and FACS analysis. Fibroblast function was assessed by analysis of replicative senescence. We observed the presence of distinct fibroblast phenotypes in vivo, characterized by various combinations of Desmin, αSMA, CD36, or CD97 expression. Most markers demonstrated stable expression over passages in vitro, but significant changes were observed for CD36, CD54, CD82, CD106, and CD140a. Replicative senescence of fibroblasts was observed from passage 10 onward. CD36- and CD97-positive but αSMA-negative cells were present in remodeled areas of IPF lungs. Transforming growth factor (TGF)-β treatment induced αSMA and collagen I expression but repressed CD36 and CD97 expression. We identified a panel of stable surface markers in human lung fibroblasts, applicable for positive-cell isolation directly from lung tissue. TGF-β exposure represses CD36 and CD97 expression, despite increasing αSMA expression; we therefore identified complex surface protein changes during fibroblast-myofibroblast activation. Coexistence of quiescence and activated fibroblast subtypes in the IPF lung suggests dynamic remodeling of fibroblast activation upon subtle changes to growth factor exposure in local microenvironmental niches.
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Affiliation(s)
- Katharina Heinzelmann
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Mareike Lehmann
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Michael Gerckens
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Nina Noskovičová
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Marion Frankenberger
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Michael Lindner
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany
| | - Rudolf Hatz
- Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany.,Thoraxchirurgisches Zentrum, Klinik für Allgemeine-, Viszeral-, Transplantations-, Gefäss- und Thoraxchirurgie, Klinikum Grosshadern, Ludwig-Maximilians-Universität, Munich , Germany
| | - Jürgen Behr
- Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany.,Medizinische Klinik und Poliklinik V, Klinikum der Ludwig-Maximilians-Universität, Munich , Germany
| | - Anne Hilgendorff
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Department of Neonatology, Perinatal Center Grosshadern, Ludwig-Maximilians University , Munich , Germany.,Center for Comprehensive Developmental Care, Dr. von Haunersches Children's Hospital University Hospital Ludwig-Maximilians University , Munich , Germany
| | - Melanie Königshoff
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Division of Respiratory Sciences and Critical Care Medicine, University of Colorado , Denver, Colorado
| | - Oliver Eickelberg
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Division of Respiratory Sciences and Critical Care Medicine, University of Colorado , Denver, Colorado
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32
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Non-Canonical Cell Death Induced by p53. Int J Mol Sci 2016; 17:ijms17122068. [PMID: 27941671 PMCID: PMC5187868 DOI: 10.3390/ijms17122068] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 11/30/2016] [Accepted: 12/06/2016] [Indexed: 12/19/2022] Open
Abstract
Programmed cell death is a vital biological process for multicellular organisms to maintain cellular homeostasis, which is regulated in a complex manner. Over the past several years, apart from apoptosis, which is the principal mechanism of caspase-dependent cell death, research on non-apoptotic forms of programmed cell death has gained momentum. p53 is a well characterized tumor suppressor that controls cell proliferation and apoptosis and has also been linked to non-apoptotic, non-canonical cell death mechanisms. p53 impacts these non-canonical forms of cell death through transcriptional regulation of its downstream targets, as well as direct interactions with key players involved in these mechanisms, in a cell type- or tissue context-dependent manner. In this review article, we summarize and discuss the involvement of p53 in several non-canonical modes of cell death, including caspase-independent apoptosis (CIA), ferroptosis, necroptosis, autophagic cell death, mitotic catastrophe, paraptosis, and pyroptosis, as well as its role in efferocytosis which is the process of clearing dead or dying cells.
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33
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Phagocytosis of apoptotic cells in homeostasis. Nat Immunol 2015; 16:907-17. [PMID: 26287597 DOI: 10.1038/ni.3253] [Citation(s) in RCA: 534] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 07/17/2015] [Indexed: 02/07/2023]
Abstract
Human bodies collectively turn over about 200 billion to 300 billion cells every day. Such turnover is an integral part of embryonic and postnatal development, as well as routine tissue homeostasis. This process involves the induction of programmed cell death in specific cells within the tissues and the specific recognition and removal of dying cells by a clearance 'crew' composed of professional, non-professional and specialized phagocytes. In the past few years, considerable progress has been made in identifying many features of apoptotic cell clearance. Some of these new observations challenge the way dying cells themselves are viewed, as well as how healthy cells interact with and respond to dying cells. Here we focus on the homeostatic removal of apoptotic cells in tissues.
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34
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Black LL, Srivastava R, Schoeb TR, Moore RD, Barnes S, Kabarowski JH. Cholesterol-Independent Suppression of Lymphocyte Activation, Autoimmunity, and Glomerulonephritis by Apolipoprotein A-I in Normocholesterolemic Lupus-Prone Mice. THE JOURNAL OF IMMUNOLOGY 2015; 195:4685-98. [PMID: 26466956 DOI: 10.4049/jimmunol.1500806] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/21/2015] [Indexed: 11/19/2022]
Abstract
Apolipoprotein (Apo)A-I, the major lipid-binding protein of high-density lipoprotein, can prevent autoimmunity and suppress inflammation in hypercholesterolemic mice by attenuating lymphocyte cholesterol accumulation and removing tissue-oxidized lipids. However, whether ApoA-I mediates immune-suppressive or anti-inflammatory effects under normocholesterolemic conditions and the mechanisms involved remain unresolved. We transferred bone marrow from systemic lupus erythematosus (SLE)-prone Sle123 mice into normal, ApoA-I-knockout (ApoA-I(-/-)) and ApoA-I-transgenic (ApoA-I(tg)) mice. Increased ApoA-I in ApoA-I(tg) mice suppressed CD4(+) T and B cell activation without changing lymphocyte cholesterol levels or reducing major ApoA-I-binding oxidized fatty acids. Unexpectedly, oxidized fatty acid peroxisome proliferator-activated receptor γ ligands 13- and 9-hydroxyoctadecadienoic acid were increased in lymphocytes of autoimmune ApoA-I(tg) mice. ApoA-I reduced Th1 cells independently of changes in CD4(+)Foxp3(+) regulatory T cells or CD11c(+) dendritic cell activation and migration. Follicular helper T cells, germinal center B cells, and autoantibodies were also lower in ApoA-I(tg) mice. Transgenic ApoA-I also improved SLE-mediated glomerulonephritis. However, ApoA-I deficiency did not have the opposite effects on autoimmunity or glomerulonephritis, possibly as the result of compensatory increases in ApoE on high-density lipoprotein. We conclude that, although compensatory mechanisms prevent the proinflammatory effects of ApoA-I deficiency in normocholesterolemic mice, increasing ApoA-I can attenuate lymphocyte activation and autoimmunity in SLE independently of cholesterol transport, possibly through oxidized fatty acid peroxisome proliferator-activated receptor γ ligands, and it can reduce renal inflammation in glomerulonephritis.
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Affiliation(s)
- Leland L Black
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Roshni Srivastava
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Trenton R Schoeb
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294; and
| | - Ray D Moore
- Department of Pharmacology and Toxicology, Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Stephen Barnes
- Department of Pharmacology and Toxicology, Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Janusz H Kabarowski
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294;
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35
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Romero F, Shah D, Duong M, Penn RB, Fessler MB, Madenspacher J, Stafstrom W, Kavuru M, Lu B, Kallen CB, Walsh K, Summer R. A pneumocyte-macrophage paracrine lipid axis drives the lung toward fibrosis. Am J Respir Cell Mol Biol 2015; 53:74-86. [PMID: 25409201 DOI: 10.1165/rcmb.2014-0343oc] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Lipid-laden macrophages, or "foam cells," are observed in the lungs of patients with fibrotic lung disease, but their contribution to disease pathogenesis remains unexplored. Here, we demonstrate that fibrosis induced by bleomycin, silica dust, or thoracic radiation promotes early and sustained accumulation of foam cells in the lung. In the bleomycin model, we show that foam cells arise from neighboring alveolar epithelial type II cells, which respond to injury by dumping lipids into the distal airspaces of the lungs. We demonstrate that oxidized phospholipids accumulate within alveolar macrophages (AMs) after bleomycin injury and that murine and human AMs treated with oxidized phosphatidylcholine (oxPc) become polarized along an M2 phenotype and display enhanced production of transforming growth factor-β1. The direct instillation of oxPc into the mouse lung induces foam cell formation and triggers a severe fibrotic reaction. Further, we show that reducing pulmonary lipid clearance by targeted deletion of the lipid efflux transporter ATP-binding cassette subfamily G member 1 increases foam cell formation and worsens lung fibrosis after bleomycin. Conversely, we found that treatment with granulocyte-macrophage colony-stimulating factor attenuates fibrotic responses, at least in part through its ability to decrease AM lipid accumulation. In summary, this work describes a novel mechanism leading to foam cell formation in the mouse lung and suggests that strategies aimed at blocking foam cell formation might be effective for treating fibrotic lung disorders.
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Affiliation(s)
- Freddy Romero
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Dilip Shah
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Michelle Duong
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Raymond B Penn
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Michael B Fessler
- 2 Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina; and
| | - Jennifer Madenspacher
- 2 Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina; and
| | - William Stafstrom
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Mani Kavuru
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
| | - Bo Lu
- 3 Bodine Cancer Center, and
| | - Caleb B Kallen
- 4 Department of Obstetrics and Gynecology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Kenneth Walsh
- 5 Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts
| | - Ross Summer
- 1 Center for Translational Medicine and Jane and Leonard Korman Lung Center
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36
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Pennathur S, Pasichnyk K, Bahrami NM, Zeng L, Febbraio M, Yamaguchi I, Okamura DM. The macrophage phagocytic receptor CD36 promotes fibrogenic pathways on removal of apoptotic cells during chronic kidney injury. THE AMERICAN JOURNAL OF PATHOLOGY 2015; 185:2232-45. [PMID: 26092500 DOI: 10.1016/j.ajpath.2015.04.016] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 04/04/2015] [Accepted: 04/08/2015] [Indexed: 12/19/2022]
Abstract
The removal of apoptotic cells is an innate function of tissue macrophages; however, its role in disease progression is unclear. The present study was designed to investigate the role of macrophage CD36, a recognized receptor of apoptotic cells and oxidized lipids, in two models of kidney injury: unilateral ureteral obstruction (UUO) and ischemia reperfusion. To differentiate the macrophage CD36-specific effects in vivo, we generated CD36 chimeric mice by bone marrow transplantation and evaluated the two models. Fibrosis severity was substantially decreased after UUO with a corresponding decrease in matrix synthesis in macrophage CD36-deficient mice. Despite a reduction in fibrosis severity, a 56% increase in apoptotic cells was found without an increase in apoptotic effectors. In addition, a substantial reduction was observed in tumor necrosis factor-α and transforming growth factor-β1 mRNA levels and intracellular bioactive oxidized lipid levels in CD36-deficient macrophages. To validate the functional role of macrophage CD36, we performed unilateral ischemia reperfusion, followed by contralateral nephrectomy. Similarly, we found that the severity of fibrosis was reduced by 55% with a corresponding improvement in kidney function by 88% in macrophage CD36-deficient mice. Taken together, these data suggest that macrophage CD36 is a critical regulator of oxidative fibrogenic signaling and that CD36-mediated phagocytosis of apoptotic cells may serve as an important pathway in the progression of fibrosis.
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Affiliation(s)
| | - Katie Pasichnyk
- Seattle Children's Hospital Research Institute, University of Washington, Seattle, Washington
| | - Nadia M Bahrami
- Seattle Children's Hospital Research Institute, University of Washington, Seattle, Washington
| | - Lixia Zeng
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Maria Febbraio
- Department of Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Ikuyo Yamaguchi
- Seattle Children's Hospital Research Institute, University of Washington, Seattle, Washington
| | - Daryl M Okamura
- Seattle Children's Hospital Research Institute, University of Washington, Seattle, Washington.
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37
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Prince LR, Maxwell NC, Gill SK, Dockrell DH, Sabroe I, McGreal EP, Kotecha S, Whyte MK. Macrophage phenotype is associated with disease severity in preterm infants with chronic lung disease. PLoS One 2014; 9:e103059. [PMID: 25115925 PMCID: PMC4130498 DOI: 10.1371/journal.pone.0103059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 06/26/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The etiology of persistent lung inflammation in preterm infants with chronic lung disease of prematurity (CLD) is poorly characterized, hampering efforts to stratify prognosis and treatment. Airway macrophages are important innate immune cells with roles in both the induction and resolution of tissue inflammation. OBJECTIVES To investigate airway innate immune cellular phenotypes in preterm infants with respiratory distress syndrome (RDS) or CLD. METHODS Bronchoalveolar lavage (BAL) fluid was obtained from term and preterm infants requiring mechanical ventilation. BAL cells were phenotyped by flow cytometry. RESULTS Preterm birth was associated with an increase in the proportion of non-classical CD14(+)/CD16(+) monocytes on the day of delivery (58.9 ± 5.8% of total mononuclear cells in preterm vs 33.0 ± 6.1% in term infants, p = 0.02). Infants with RDS were born with significantly more CD36(+) macrophages compared with the CLD group (70.3 ± 5.3% in RDS vs 37.6 ± 8.9% in control, p = 0.02). At day 3, infants born at a low gestational age are more likely to have greater numbers of CD14(+) mononuclear phagocytes in the airway (p = 0.03), but fewer of these cells are functionally polarized as assessed by HLA-DR (p = 0.05) or CD36 (p = 0.05) positivity, suggesting increased recruitment of monocytes or a failure to mature these cells in the lung. CONCLUSIONS These findings suggest that macrophage polarization may be affected by gestational maturity, that more immature macrophage phenotypes may be associated with the progression of RDS to CLD and that phenotyping mononuclear cells in BAL could predict disease outcome.
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Affiliation(s)
- Lynne R. Prince
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom
- * E-mail:
| | - Nicola C. Maxwell
- Department of Child Health, Cardiff University, Cardiff, United Kingdom
| | - Sharonjit K. Gill
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom
| | - David H. Dockrell
- Academic Unit of Immunology and Infectious Disease, Department of Infection and Immunity, University of Sheffield, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom
| | - Ian Sabroe
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom
| | - Eamon P. McGreal
- Department of Child Health, Cardiff University, Cardiff, United Kingdom
| | - Sailesh Kotecha
- Department of Child Health, Cardiff University, Cardiff, United Kingdom
| | - Moira K. Whyte
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield Teaching Hospitals NHS Trust, Sheffield, United Kingdom
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