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Dunbar H, Hawthorne IJ, McNamee EN, Armstrong ME, Donnelly SC, English K. The human MIF polymorphism CATT 7 enhances pro-inflammatory macrophage polarization in a clinically relevant model of allergic airway inflammation. FASEB J 2024; 38:e23576. [PMID: 38530238 DOI: 10.1096/fj.202400207r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/29/2024] [Accepted: 03/11/2024] [Indexed: 03/27/2024]
Abstract
High level expression of the pro-inflammatory cytokine macrophage migration inhibitory factor (MIF) has been associated with severe asthma. The role of MIF and its functional promotor polymorphism in innate immune training is currently unknown. Using novel humanized CATT7 MIF mice, this study is the first to investigate the effect of MIF on bone marrow-derived macrophage (BMDM) memory after house dust mite (HDM) challenge. CATT7 BMDMs demonstrated a significant primed increase in M1 markers following HDM and LPS stimulation, compared to naive mice. This M1 signature was found to be MIF-dependent, as administration of a small molecule MIF inhibitor, SCD-19, blocked the induction of this pro-inflammatory M1-like phenotype in BMDMs from CATT7 mice challenged with HDM. Training naive BMDMs in vitro with HDM for 24 h followed by a rest period and subsequent stimulation with LPS led to significantly increased production of the pro-inflammatory cytokine TNFα in BMDMs from CATT7 mice but not WT mice. Addition of the pan methyltransferase inhibitor MTA before HDM training significantly abrogated this effect in BMDMs from CATT7 mice, suggesting that HDM-induced training is associated with epigenetic remodelling. These findings suggest that trained immunity induced by HDM is under genetic control, playing an important role in asthma patients with the high MIF genotypes (CATT6/7/8).
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Affiliation(s)
- Hazel Dunbar
- Department of Biology, Maynooth University, Maynooth, Ireland
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Ireland
| | - Ian J Hawthorne
- Department of Biology, Maynooth University, Maynooth, Ireland
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Ireland
| | - Eóin N McNamee
- Department of Biology, Maynooth University, Maynooth, Ireland
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Ireland
| | - Michelle E Armstrong
- Department of Medicine, Trinity College Dublin and Tallaght University Hospital, Dublin, Ireland
| | - Seamas C Donnelly
- Department of Medicine, Trinity College Dublin and Tallaght University Hospital, Dublin, Ireland
| | - Karen English
- Department of Biology, Maynooth University, Maynooth, Ireland
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Ireland
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2
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Masterson JC, Biette KA, Hammer JA, Nguyen N, Capocelli KE, Saeedi BJ, Harris RF, Fernando SD, Hosford LB, Kelly CJ, Campbell EL, Ehrentraut SF, Ahmed FN, Nakagawa H, Lee JJ, McNamee EN, Glover LE, Colgan SP, Furuta GT. Epithelial HIF-1α/claudin-1 axis regulates barrier dysfunction in eosinophilic esophagitis. J Clin Invest 2019; 129:3224-3235. [PMID: 31264974 DOI: 10.1172/jci126744] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/16/2019] [Indexed: 12/19/2022] Open
Abstract
Epithelial barrier dysfunction is a significant factor in many allergic diseases, including eosinophilic esophagitis (EoE). Infiltrating leukocytes and tissue adaptations increase metabolic demands and decrease oxygen availability at barrier surfaces. Understanding of how these processes impact barrier is limited, particularly in allergy. Here, we identified a regulatory axis whereby the oxygen-sensing transcription factor HIF-1α orchestrated epithelial barrier integrity, selectively controlling tight junction CLDN1 (claudin-1). Prolonged experimental hypoxia or HIF1A knockdown suppressed HIF-1α-dependent claudin-1 expression and epithelial barrier function, as documented in 3D organotypic epithelial cultures. L2-IL5OXA mice with EoE-relevant allergic inflammation displayed localized eosinophil oxygen metabolism, tissue hypoxia, and impaired claudin-1 barrier via repression of HIF-1α/claudin-1 signaling, which was restored by transgenic expression of esophageal epithelial-targeted stabilized HIF-1α. EoE patient biopsy analysis identified a repressed HIF-1α/claudin-1 axis, which was restored via pharmacologic HIF-1α stabilization ex vivo. Collectively, these studies reveal HIF-1α's critical role in maintaining barrier and highlight the HIF-1α/claudin-1 axis as a potential therapeutic target for EoE.
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Affiliation(s)
- Joanne C Masterson
- Allergy, Inflammation and Remodeling Research Laboratory, Human Health Research Institute, Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland.,Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Kathryn A Biette
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Juliet A Hammer
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Nathalie Nguyen
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Kelley E Capocelli
- Department of Pathology, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Bejan J Saeedi
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Rachel F Harris
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Shahan D Fernando
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Lindsay B Hosford
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Caleb J Kelly
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Eric L Campbell
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Stefan F Ehrentraut
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Faria N Ahmed
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA
| | - Hiroshi Nakagawa
- Division of Gastroenterology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | | - Eóin N McNamee
- Allergy, Inflammation and Remodeling Research Laboratory, Human Health Research Institute, Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Louise E Glover
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Sean P Colgan
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Glenn T Furuta
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
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3
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Abstract
A predominant feature of intestinal inflammation is the accumulation of neutrophils, which dictates a fine balance between epithelial repair or progression to chronic inflammation. While the processes of mucosal healing are well studied, how neutrophils advance an inflammatory insult towards epithelial neoplasia is less understood. In this issue of the JCI, Butin-Israeli et al. outline a mechanism whereby neutrophils control epithelial fitness and genomic instability via delivery of miR-23a-and miR-155-containing microparticles. Localized delivery of antisense oligonucleotides targeting miR-23a and miR-155 reversed this genomic instability and accelerated mucosal healing. This mechanism of neutrophil-derived microRNA shuttling opens up new therapeutic potential to enhance epithelial healing and limit mucosal injury.
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4
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Grenz A, Bauerle JD, Dalton JH, Ridyard D, Badulak A, Tak E, McNamee EN, Clambey E, Moldovan R, Reyes G, Klawitter J, Ambler K, Magee K, Christians U, Brodsky KS, Ravid K, Choi DS, Wen J, Lukashev D, Blackburn MR, Osswald H, Coe IR, Nürnberg B, Haase VH, Xia Y, Sitkovsky M, Eltzschig HK. Equilibrative nucleoside transporter 1 (ENT1) regulates postischemic blood flow during acute kidney injury in mice. J Clin Invest 2017; 127:2438. [DOI: 10.1172/jci94890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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5
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Neudecker V, Haneklaus M, Jensen O, Khailova L, Masterson JC, Tye H, Biette K, Jedlicka P, Brodsky KS, Gerich ME, Mack M, Robertson AAB, Cooper MA, Furuta GT, Dinarello CA, O'Neill LA, Eltzschig HK, Masters SL, McNamee EN. Myeloid-derived miR-223 regulates intestinal inflammation via repression of the NLRP3 inflammasome. J Exp Med 2017; 214:1737-1752. [PMID: 28487310 PMCID: PMC5460990 DOI: 10.1084/jem.20160462] [Citation(s) in RCA: 268] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 01/22/2017] [Accepted: 03/28/2017] [Indexed: 12/16/2022] Open
Abstract
Neudecker et al. define a role for a microRNA, miR-223, in regulating the inflammatory tone of the intestine by constraining nlrp3 inflammasome activation in CCR2+ monocytes and attenuating excessive IL-1β–driven inflammation. Therapeutic nanoparticle delivery of miR-223 mimetics limits experimental colitis. MicroRNA (miRNA)-mediated RNA interference regulates many immune processes, but how miRNA circuits orchestrate aberrant intestinal inflammation during inflammatory bowel disease (IBD) is poorly defined. Here, we report that miR-223 limits intestinal inflammation by constraining the nlrp3 inflammasome. miR-223 was increased in intestinal biopsies from patients with active IBD and in preclinical models of intestinal inflammation. miR-223-/y mice presented with exacerbated myeloid-driven experimental colitis with heightened clinical, histopathological, and cytokine readouts. Mechanistically, enhanced NLRP3 inflammasome expression with elevated IL-1β was a predominant feature during the initiation of colitis with miR-223 deficiency. Depletion of CCR2+ inflammatory monocytes and pharmacologic blockade of IL-1β or NLRP3 abrogated this phenotype. Generation of a novel mouse line, with deletion of the miR-223 binding site in the NLRP3 3′ untranslated region, phenocopied the characteristics of miR-223-/y mice. Finally, nanoparticle-mediated overexpression of miR-223 attenuated experimental colitis, NLRP3 levels, and IL-1β release. Collectively, our data reveal a previously unappreciated role for miR-223 in regulating the innate immune response during intestinal inflammation.
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Affiliation(s)
- Viola Neudecker
- Clinic for Anesthesiology, University Hospital of Ludwig-Maximilians-University, 80539 Munich, Germany.,Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Moritz Haneklaus
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Owen Jensen
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045.,Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Ludmila Khailova
- Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Joanne C Masterson
- Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology, and Nutrition, Children's Hospital Colorado, Aurora, CO 80045.,Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Hazel Tye
- Division of Inflammation, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Kathryn Biette
- Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology, and Nutrition, Children's Hospital Colorado, Aurora, CO 80045.,Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Paul Jedlicka
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Kelley S Brodsky
- Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Mark E Gerich
- Division of Gastroenterology and Hepatology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045.,Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Matthias Mack
- Department of Internal Medicine II, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Avril A B Robertson
- Institute for Molecular Bioscience, The University of Queensland, Brisbane City, QLD 4067, Australia
| | - Matthew A Cooper
- Institute for Molecular Bioscience, The University of Queensland, Brisbane City, QLD 4067, Australia
| | - Glenn T Furuta
- Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology, and Nutrition, Children's Hospital Colorado, Aurora, CO 80045.,Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Charles A Dinarello
- Department of Medicine, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands.,Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Luke A O'Neill
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Holger K Eltzschig
- Department of Anesthesiology, University of Texas Medical School at Houston, Houston, TX 77030.,Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Seth L Masters
- Division of Inflammation, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Eóin N McNamee
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045 .,Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
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6
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Hoegl S, Ehrentraut H, Brodsky KS, Victorino F, Golden-Mason L, Eltzschig HK, McNamee EN. NK cells regulate CXCR2+ neutrophil recruitment during acute lung injury. J Leukoc Biol 2016; 101:471-480. [PMID: 27601626 DOI: 10.1189/jlb.3a0516-227r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 08/03/2016] [Accepted: 08/10/2016] [Indexed: 12/18/2022] Open
Abstract
A critical step in the pathogenesis of acute lung injury (ALI) is excessive recruitment of polymorphonuclear neutrophils (PMNs) into the lungs, causing significant collateral tissue damage. Defining the molecular and cellular steps that control neutrophil infiltration and activation during ALI is therefore of important therapeutic relevance. Based on previous findings implicating the transcription factor Tbet in mucosal Th1-inflammation, we hypothesized a detrimental role for Tbet during ALI. In line with our hypothesis, initial studies of endotoxin-induced lung injury revealed a marked protection of Tbet-/- mice, including attenuated neutrophilia compared to WT counterparts. Surprisingly, subsequent studies identified natural killer (NK) cells as the major source of pulmonary Tbet during ALI. In addition, a chemokine screen suggested that mature Tbet+ NK-cells are critical for the production of pulmonary CXCL1 and -2, thereby contributing to pulmonary PMN recruitment. Indeed, both NK-cell Ab depletion and adoptive transfer studies provide evidence for NK cells in the orchestration of neutrophil recruitment during endotoxin-induced ALI. Taken together, these findings identify a novel role for Tbet+ NK-cells in initiating the early events of noninfectious pulmonary inflammation.
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Affiliation(s)
- Sandra Hoegl
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA.,Clinic for Anesthesiology, University Hospital of Ludwig-Maximilians-University, Munich, Germany
| | - Heidi Ehrentraut
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA.,Department of Anesthesiology and Intensive Care Medicine, University Hospital, Bonn, Germany; and
| | - Kelley S Brodsky
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Francisco Victorino
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA.,Integrated Department of Immunology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Lucy Golden-Mason
- Division of Gastroenterology and Hepatology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Holger K Eltzschig
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Eóin N McNamee
- Organ Protection Program, Department of Anesthesiology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA.,Mucosal Inflammation Program, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
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7
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McNamee EN, Rivera-Nieves J. Ectopic Tertiary Lymphoid Tissue in Inflammatory Bowel Disease: Protective or Provocateur? Front Immunol 2016; 7:308. [PMID: 27579025 PMCID: PMC4985530 DOI: 10.3389/fimmu.2016.00308] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/29/2016] [Indexed: 12/15/2022] Open
Abstract
Organized lymphoid tissues like the thymus first appeared in jawed vertebrates around 500 million years ago and have evolved to equip the host with a network of specialized sites, strategically located to orchestrate strict immune-surveillance and efficient immune responses autonomously. The gut-associated lymphoid tissues maintain a mostly tolerant environment to dampen our responses to daily dietary and microbial products in the intestine. However, when this homeostasis is perturbed by chronic inflammation, the intestine is able to develop florid organized tertiary lymphoid tissues (TLT), which heralds the onset of regional immune dysregulation. While TLT are a pathologic hallmark of Crohn's disease (CD), their role in the overall process remains largely enigmatic. A critical question remains; are intestinal TLT generated by the immune infiltrated intestine to modulate immune responses and rebuild tolerance to the microbiota or are they playing a more sinister role by generating dysregulated responses that perpetuate disease? Herein, we discuss the main theories of intestinal TLT neogenesis and focus on the most recent findings that open new perspectives to their role in inflammatory bowel disease.
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Affiliation(s)
- Eóin N McNamee
- Mucosal Inflammation Program, Department of Anesthesiology, School of Medicine, University of Colorado - Anschutz Medical Campus , Aurora, CO , USA
| | - Jesús Rivera-Nieves
- Division of Gastroenterology, Inflammatory Bowel Disease Center, San Diego VAMC, University of California San Diego , La Jolla, CA , USA
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8
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Frasch SC, McNamee EN, Kominsky D, Jedlicka P, Jakubzick C, Zemski Berry K, Mack M, Furuta GT, Lee JJ, Henson PM, Colgan SP, Bratton DL. G2A Signaling Dampens Colitic Inflammation via Production of IFN-γ. J Immunol 2016; 197:1425-34. [PMID: 27402702 PMCID: PMC4975950 DOI: 10.4049/jimmunol.1600264] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 06/06/2016] [Indexed: 12/19/2022]
Abstract
Proinflammatory consequences have been described for lysophosphatidylcholine, a lipid product of cellular injury, signaling via the G protein-coupled receptor G2A on myeloid and lymphoid inflammatory cells. This prompted the hypothesis that genetic deletion of G2A would limit intestinal inflammation in a mouse model of colitis induced by dextran sodium sulfate. Surprisingly, G2A(-/-) mice exhibited significantly worsened colitis compared with wild-type mice, as demonstrated by disease activity, colon shortening, histology, and elevated IL-6 and IL-5 in colon tissues. Investigation of inflammatory cells recruited to inflamed G2A(-/-) colons showed significantly more TNF-α(+) and Ly6C(hi)MHCII(-) proinflammatory monocytes and eosinophils than in wild-type colons. Both monocytes and eosinophils were pathogenic as their depletion abolished the excess inflammation in G2A(-/-) mice. G2A(-/-) mice also had less IFN-γ in inflamed colon tissues than wild-type mice. Fewer CD4(+) lymphocytes were recruited to inflamed G2A(-/-) colons, and fewer colonic lymphocytes produced IFN-γ upon ex vivo stimulation. Administration of IFN-γ to G2A(-/-) mice during dextran sodium sulfate exposure abolished the excess colitic inflammation and reduced colonic IL-5 and eosinophil numbers to levels seen in wild-type mice. Furthermore, IFN-γ reduced the numbers of TNF-α(+) monocyte and enhanced their maturation from Ly6C(hi)MHCII(-) to Ly6C(int)MHCII(+) Taken together, the data suggest that G2A signaling serves to dampen intestinal inflammation via the production of IFN-γ, which, in turn, enhances monocyte maturation to a less inflammatory program and ultimately reduces eosinophil-induced injury of colonic tissues.
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Affiliation(s)
| | - Eóin N McNamee
- Mucosal Inflammation Program, Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Douglas Kominsky
- Mucosal Inflammation Program, Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Paul Jedlicka
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Claudia Jakubzick
- Department of Pediatrics, National Jewish Health, Denver, CO 80206; Department of Immunology and Microbiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80206
| | - Karin Zemski Berry
- Department of Pharmacology, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO 80045
| | - Matthias Mack
- Department of Internal Medicine, University of Regensburg, 93042 Regensburg, Germany
| | - Glenn T Furuta
- Digestive Health Institute, Children's Hospital Colorado, Aurora, CO 80045; Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045; and
| | - James J Lee
- Division of Pulmonary Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic in Arizona, Scottsdale, AZ 85259
| | - Peter M Henson
- Department of Pediatrics, National Jewish Health, Denver, CO 80206
| | - Sean P Colgan
- Mucosal Inflammation Program, Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Donna L Bratton
- Department of Pediatrics, National Jewish Health, Denver, CO 80206
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9
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Abstract
In this issue of Science Signaling, Bullen et al demonstrate that protein kinase A (PKA) phosphorylates and stimulates the transcriptional activity of hypoxia-inducible transcription factor-1α (HIF-1α). This finding may have implications in diseases processes that occur at the interface of hypoxia and inflammation, where HIF-1α stabilization can function to dampen hypoxia-driven inflammation.
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Affiliation(s)
- Eóin N McNamee
- Organ Protection Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA. Mucosal Inflammation Program, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Christine Vohwinkel
- Organ Protection Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA. Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Holger K Eltzschig
- Organ Protection Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA. Mucosal Inflammation Program, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA.
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10
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Ferrari D, McNamee EN, Idzko M, Gambari R, Eltzschig HK. Purinergic Signaling During Immune Cell Trafficking. Trends Immunol 2016; 37:399-411. [PMID: 27142306 DOI: 10.1016/j.it.2016.04.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/05/2016] [Accepted: 04/07/2016] [Indexed: 12/24/2022]
Abstract
Migration and positioning of immune cells is fundamental for their differentiation and recruitment at sites of infection. Besides the fundamental role played by chemokines and their receptors, recent studies demonstrate that a complex network of purinergic signaling events plays a key role in these trafficking events. This process includes the release of nucleotides (such as ATP and ADP) and subsequent autocrine and paracrine signaling events through nucleotide receptors. At the same time, surface-expressed ectoapyrases and nucleotidases convert extracellular nucleotides to adenosine, and adenosine signaling events play additional functional roles in leucocyte trafficking. In this review we revisit classical paradigms of inflammatory cell trafficking in the context of recent studies implicating purinergic signaling events in this process.
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Affiliation(s)
- Davide Ferrari
- Department of Life Science and Biotechnology, University of Ferrara, I-44100 Ferrara, Italy.
| | - Eóin N McNamee
- Organ Protection Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Marco Idzko
- Department of Pulmonary Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Roberto Gambari
- Department of Life Science and Biotechnology, University of Ferrara, I-44100 Ferrara, Italy
| | - Holger K Eltzschig
- Organ Protection Program, Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
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11
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Aherne CM, Saeedi B, Collins CB, Masterson JC, McNamee EN, Perrenoud L, Rapp CR, Curtis VF, Bayless A, Fletcher A, Glover LE, Evans CM, Jedlicka P, Furuta GT, de Zoeten EF, Colgan SP, Eltzschig HK. Epithelial-specific A2B adenosine receptor signaling protects the colonic epithelial barrier during acute colitis. Mucosal Immunol 2015; 8:1324-38. [PMID: 25850656 PMCID: PMC4598274 DOI: 10.1038/mi.2015.22] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 02/17/2015] [Indexed: 02/04/2023]
Abstract
Central to inflammatory bowel disease (IBD) pathogenesis is loss of mucosal barrier function. Emerging evidence implicates extracellular adenosine signaling in attenuating mucosal inflammation. We hypothesized that adenosine-mediated protection from intestinal barrier dysfunction involves tissue-specific signaling through the A2B adenosine receptor (Adora2b) at the intestinal mucosal surface. To address this hypothesis, we combined pharmacologic studies and studies in mice with global or tissue-specific deletion of the Adora2b receptor. Adora2b(-/-) mice experienced a significantly heightened severity of colitis, associated with a more acute onset of disease and loss of intestinal epithelial barrier function. Comparison of mice with Adora2b deletion on vascular endothelial cells (Adora2b(fl/fl)VeCadCre(+)) or intestinal epithelia (Adora2b(fl/fl)VillinCre(+)) revealed a selective role for epithelial Adora2b signaling in attenuating colonic inflammation. In vitro studies with Adora2b knockdown in intestinal epithelial cultures or pharmacologic studies highlighted Adora2b-driven phosphorylation of vasodilator-stimulated phosphoprotein (VASP) as a specific barrier repair response. Similarly, in vivo studies in genetic mouse models or treatment studies with an Adora2b agonist (BAY 60-6583) recapitulate these findings. Taken together, our results suggest that intestinal epithelial Adora2b signaling provides protection during intestinal inflammation via enhancing mucosal barrier responses.
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Affiliation(s)
- CM Aherne
- Department of Anesthesiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - B Saeedi
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - CB Collins
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Children’s Hospital Colorado, Aurora, Colorado, USA
| | - JC Masterson
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Children’s Hospital Colorado, Aurora, Colorado, USA
| | - EN McNamee
- Department of Anesthesiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - L Perrenoud
- Department of Anesthesiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - CR Rapp
- Department of Anesthesiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - VF Curtis
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - A Bayless
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - A Fletcher
- Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - LE Glover
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - CM Evans
- Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - P Jedlicka
- Department of Pathology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - GT Furuta
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Children’s Hospital Colorado, Aurora, Colorado, USA
| | - EF de Zoeten
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA,Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Children’s Hospital Colorado, Aurora, Colorado, USA
| | - SP Colgan
- Mucosal Inflammation Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - HK Eltzschig
- Department of Anesthesiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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12
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Masterson JC, McNamee EN, Fillon SA, Hosford L, Harris R, Fernando SD, Jedlicka P, Iwamoto R, Jacobsen E, Protheroe C, Eltzschig HK, Colgan SP, Arita M, Lee JJ, Furuta GT. Eosinophil-mediated signalling attenuates inflammatory responses in experimental colitis. Gut 2015; 64:1236-47. [PMID: 25209655 PMCID: PMC4515997 DOI: 10.1136/gutjnl-2014-306998] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 08/19/2014] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Eosinophils reside in the colonic mucosa and increase significantly during disease. Although a number of studies have suggested that eosinophils contribute to the pathogenesis of GI inflammation, the expanding scope of eosinophil-mediated activities indicate that they also regulate local immune responses and modulate tissue inflammation. We sought to define the impact of eosinophils that respond to acute phases of colitis in mice. DESIGN Acute colitis was induced in mice by administration of dextran sulfate sodium, 2,4,6-trinitrobenzenesulfonic acid or oxazolone to C57BL/6J (control) or eosinophil deficient (PHIL) mice. Eosinophils were also depleted from mice using antibodies against interleukin (IL)-5 or by grafting bone marrow from PHIL mice into control mice. Colon tissues were collected and analysed by immunohistochemistry, flow cytometry and reverse transcription PCR; lipids were analysed by mass spectroscopy. RESULTS Eosinophil-deficient mice developed significantly more severe colitis, and their colon tissues contained a greater number of neutrophils, than controls. This compensatory increase in neutrophils was accompanied by increased levels of the chemokines CXCL1 and CXCL2, which attract neutrophils. Lipidomic analyses of colonic tissue from eosinophil-deficient mice identified a deficiency in the docosahexaenoic acid-derived anti-inflammatory mediator 10, 17- dihydroxydocosahexaenoic acid (diHDoHE), namely protectin D1 (PD1). Administration of an exogenous PD1-isomer (10S, 17S-DiHDoHE) reduced the severity of colitis in eosinophil-deficient mice. The PD1-isomer also attenuated neutrophil infiltration and reduced levels of tumour necrosis factor-α, IL-1β, IL-6 and inducible NO-synthase in colons of mice. Finally, in vitro assays identified a direct inhibitory effect of PD1-isomer on neutrophil transepithelial migration. CONCLUSIONS Eosinophils exert a protective effect in acute mouse colitis, via production of anti-inflammatory lipid mediators.
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Affiliation(s)
- Joanne C Masterson
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Eóin N McNamee
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA,Department of Anesthesiology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Sophie A Fillon
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Lindsay Hosford
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Rachel Harris
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Shahan D Fernando
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Paul Jedlicka
- University of Colorado School of Medicine, Aurora, Colorado, USA,Department of Pathology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Ryo Iwamoto
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
| | - Elizabeth Jacobsen
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan,Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
| | - Cheryl Protheroe
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan,Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
| | - Holger K Eltzschig
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA,Department of Anesthesiology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Sean P Colgan
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA,Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Makoto Arita
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan,Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - James J Lee
- Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
| | - Glenn T Furuta
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics; Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado, USA,University of Colorado School of Medicine, Aurora, Colorado, USA
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13
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McNamee EN, Masterson JC, Veny M, Collins CB, Jedlicka P, Byrne FR, Ng GY, Rivera-Nieves J. Chemokine receptor CCR7 regulates the intestinal TH1/TH17/Treg balance during Crohn's-like murine ileitis. J Leukoc Biol 2015; 97:1011-22. [PMID: 25637591 DOI: 10.1189/jlb.3hi0614-303r] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 12/30/2014] [Indexed: 12/16/2022] Open
Abstract
The regulation of T cell and DC retention and lymphatic egress within and from the intestine is critical for intestinal immunosurveillance; however, the cellular processes that orchestrate this balance during IBD remain poorly defined. With the use of a mouse model of TNF-driven Crohn's-like ileitis (TNF(Δ) (ARE)), we examined the role of CCR7 in the control of intestinal T cell and DC retention/egress during experimental CD. We observed that the frequency of CCR7-expressing TH1/TH17 effector lymphocytes increased during active disease in TNF(Δ) (ARE) mice and that ΔARE/CCR7(-/-) mice developed exacerbated ileitis and multiorgan inflammation, with a marked polarization and ileal retention of TH1 effector CD4(+) T cells. Furthermore, adoptive transfer of ΔARE/CCR7(-/-) effector CD4(+) into lymphopenic hosts resulted in ileo-colitis, whereas those transferred with ΔARE/CCR7(+/+) CD4(+) T cells developed ileitis. ΔARE/CCR7(-/-) mice had an acellular draining MLN, decreased CD103(+) DC, and decreased expression of RALDH enzymes and of CD4(+)CD25(+)FoxP3(+) Tregs. Lastly, a mAb against CCR7 exacerbated ileitis in TNF(Δ) (ARE) mice, phenocopying the effects of congenital CCR7 deficiency. Our data underscore a critical role for the lymphoid chemokine receptor CCR7 in orchestrating immune cell traffic and TH1 versus TH17 bias during chronic murine ileitis.
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Affiliation(s)
- Eóin N McNamee
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Joanne C Masterson
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Marisol Veny
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Colm B Collins
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Paul Jedlicka
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Fergus R Byrne
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Gordon Y Ng
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
| | - Jesús Rivera-Nieves
- *Mucosal Inflammation Program, School of Medicine, Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, and Department of Pathology, University of Colorado Denver, Colorado, USA; Department of Inflammation Research, Amgen, Thousand Oaks, California, USA; and Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California San Diego and San Diego VA Medical Center, San Diego, California, USA
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14
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Grenz A, Bauerle JD, Dalton JH, Ridyard D, Badulak A, Tak E, McNamee EN, Clambey E, Moldovan R, Reyes G, Klawitter J, Ambler K, Magee K, Christians U, Brodsky KS, Ravid K, Choi DS, Wen J, Lukashev D, Blackburn MR, Osswald H, Coe IR, Nürnberg B, Haase VH, Xia Y, Sitkovsky M, Eltzschig HK. Equilibrative nucleoside transporter 1 (ENT1) regulates postischemic blood flow during acute kidney injury in mice. J Clin Invest 2014; 124:2807. [DOI: 10.1172/jci76888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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15
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Campbell EL, Bruyninckx WJ, Kelly CJ, Glover LE, McNamee EN, Bowers BE, Bayless AJ, Scully M, Saeedi BJ, Golden-Mason L, Ehrentraut SF, Curtis VF, Burgess A, Garvey JF, Sorensen A, Nemenoff R, Jedlicka P, Taylor CT, Kominsky DJ, Colgan SP. Transmigrating neutrophils shape the mucosal microenvironment through localized oxygen depletion to influence resolution of inflammation. Immunity 2014; 40:66-77. [PMID: 24412613 DOI: 10.1016/j.immuni.2013.11.020] [Citation(s) in RCA: 338] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 11/08/2013] [Indexed: 12/18/2022]
Abstract
Acute intestinal inflammation involves early accumulation of neutrophils (PMNs) followed by either resolution or progression to chronic inflammation. Based on recent evidence that mucosal metabolism influences disease outcomes, we hypothesized that transmigrating PMNs influence the transcriptional profile of the surrounding mucosa. Microarray studies revealed a cohort of hypoxia-responsive genes regulated by PMN-epithelial crosstalk. Transmigrating PMNs rapidly depleted microenvironmental O2 sufficiently to stabilize intestinal epithelial cell hypoxia-inducible factor (HIF). By utilizing HIF reporter mice in an acute colitis model, we investigated the relative contribution of PMNs and the respiratory burst to "inflammatory hypoxia" in vivo. CGD mice, lacking a respiratory burst, developed accentuated colitis compared to control, with exaggerated PMN infiltration and diminished inflammatory hypoxia. Finally, pharmacological HIF stabilization within the mucosa protected CGD mice from severe colitis. In conclusion, transcriptional imprinting by infiltrating neutrophils modulates the host response to inflammation, via localized O2 depletion, resulting in microenvironmental hypoxia and effective inflammatory resolution.
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Affiliation(s)
- Eric L Campbell
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.
| | | | - Caleb J Kelly
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Louise E Glover
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Eóin N McNamee
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Brittelle E Bowers
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Amanda J Bayless
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Melanie Scully
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Bejan J Saeedi
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Lucy Golden-Mason
- University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Stefan F Ehrentraut
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Valerie F Curtis
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Adrianne Burgess
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | | | - Amber Sorensen
- University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Raphael Nemenoff
- University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Paul Jedlicka
- University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | | | - Douglas J Kominsky
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Sean P Colgan
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
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16
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Masterson JC, McNamee EN, Hosford L, Capocelli KE, Ruybal J, Fillon SA, Doyle AD, Eltzschig HK, Rustgi AK, Protheroe CA, Lee NA, Lee JJ, Furuta GT. Local hypersensitivity reaction in transgenic mice with squamous epithelial IL-5 overexpression provides a novel model of eosinophilic oesophagitis. Gut 2014; 63:43-53. [PMID: 23161496 PMCID: PMC3884674 DOI: 10.1136/gutjnl-2012-303631] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Eosinophilic oesophagitis (EoE) is a chronic inflammatory condition of the oesophagus with limited treatment options. No previous transgenic model has specifically targeted the oesophageal mucosa to induce oesophageal eosinophilia. DESIGN We developed a mouse model that closely resembles EoE by utilising oxazolone haptenation in mice with transgenic overexpression of an eosinophil poietic and survival factor (interleukin (IL)-5) in resident squamous oesophageal epithelia. RESULTS Overexpression of IL-5 in the healthy oesophagus was achieved in transgenic mice (L2-IL5) using the squamous epithelial promoter Epstein-Barr virus ED-L2. Oxazolone-challenged L2-IL5 mice developed dose-dependent pan-oesophageal eosinophilia, including eosinophil microabscess formation and degranulation as well as basal cell hyperplasia. Moreover, oesophagi expressed increased IL-13 and the eosinophil agonist chemokine eotaxin-1. Treatment of these mice with corticosteroids significantly reduced eosinophilia and epithelial inflammation. CONCLUSIONS L2-IL5 mice provide a novel experimental model that can potentially be used in preclinical testing of EoE-related therapeutics and mechanistic studies identifying pathogenetic features associated with mucosal eosinophilia.
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Affiliation(s)
- Joanne C Masterson
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Eóin N McNamee
- Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,Department of Anesthesiology, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Lindsay Hosford
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Kelley E Capocelli
- Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Department of Pathology, Children’s Hospital Colorado, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Joseph Ruybal
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Sophie A Fillon
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Alfred D Doyle
- Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Arizona, USA
| | - Holger K Eltzschig
- Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,Department of Anesthesiology, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Anil K Rustgi
- Division of Gastroenterology, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, USA
| | - Cheryl A Protheroe
- Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Arizona, USA
| | - Nancy A Lee
- Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Arizona, USA
| | - James J Lee
- Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Arizona, USA
| | - Glenn T Furuta
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Diseases Program, Aurora, Colorado, USA,Children’s Hospital Colorado, Aurora, Colorado, USA,Mucosal Inflammation Program, University of Colorado Denver, Aurora, Colorado, USA,University of Colorado Denver School of Medicine, Aurora, Colorado, USA
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17
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McNamee EN, Korns Johnson D, Homann D, Clambey ET. Hypoxia and hypoxia-inducible factors as regulators of T cell development, differentiation, and function. Immunol Res 2013; 55:58-70. [PMID: 22961658 DOI: 10.1007/s12026-012-8349-8] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Oxygen is a molecule that is central to cellular respiration and viability, yet there are multiple physiologic and pathological contexts in which cells experience conditions of insufficient oxygen availability, a state known as hypoxia. Given the metabolic challenges of a low oxygen environment, hypoxia elicits a range of adaptive responses at the cellular, tissue, and systemic level to promote continued survival and function. Within this context, T lymphocytes are a highly migratory cell type of the adaptive immune system that frequently encounters a wide range of oxygen tensions in both health and disease. It is now clear that oxygen availability regulates T cell differentiation and function, a response orchestrated in large part by the hypoxia-inducible factor transcription factors. Here, we discuss the physiologic scope of hypoxia and hypoxic signaling, the contribution of these pathways in regulating T cell biology, and current gaps in our understanding. Finally, we discuss how emerging therapies that modulate the hypoxic response may offer new modalities to alter T cell function and the outcome of acute and chronic pathologies.
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Affiliation(s)
- Eóin N McNamee
- Mucosal Inflammation Program, Department of Anesthesiology, School of Medicine, University of Colorado Denver, Aurora, CO 80045, USA
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18
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McNamee EN, Masterson JC, Jedlicka P, Collins CB, Williams IR, Rivera-Nieves J. Ectopic lymphoid tissue alters the chemokine gradient, increases lymphocyte retention and exacerbates murine ileitis. Gut 2013; 62:53-62. [PMID: 22267601 PMCID: PMC3726216 DOI: 10.1136/gutjnl-2011-301272] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
BACKGROUND The earliest endoscopically-evident lesion in Crohn's disease is the aphthous ulcer, which develops over ectopic lymphoid tissues (ie, inducible lymphoid follicles (ILF), tertiary lymphoid tissue (TLT)) in the chronically inflamed intestine. ILF/TLT are induced within effector sites by homeostatic lymphoid chemokines, but their role in the development of intestinal ILF/TLT and in the pathogenesis of Crohn's disease is poorly understood. DESIGN Using a mouse model of Crohn's-like ileitis (TNFARE) which develops florid induction of ILF/TLT within its terminal ileum, the contribution of the CCR7/CCL19/CCL21 chemokine axis during the development of TLT and its role in disease pathogenesis were assessed. RESULTS Both CCL19 and CCL21 were increased within the inflamed ileum of TNFARE mice, which resulted in CCR7 internalisation and impaired T cell chemotaxis. ILF/TLT were a major source of CCL19 and CCL21 and increased local synthesis, augmented recruitment/retention of effector, naïve and central memory T cell subsets within the inflamed ileum. Immunoblockade of CCR7 resulted in further effector T cell retention and exacerbation of ileitis. CONCLUSIONS Induction of ILF/TLT in the chronically inflamed intestine alters the homeostatic CCL19-CCL21 lymphoid-chemokine gradient and increases recruitment/retention of effector CCR7+ T cell subsets within the terminal ileum, contributing to the perpetuation of chronic inflammation. Thus, blockade of CCR7 or its ligands might result in deleterious consequences for subjects with chronic inflammatory diseases.
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Affiliation(s)
- Eóin N McNamee
- Mucosal Inflammation Program, School of Medicine, Aurora, Colorado, USA
| | - Joanne C Masterson
- Mucosal Inflammation Program, School of Medicine, Aurora, Colorado, USA,Gastrointestinal Eosinophilic Disease Program, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children’s Hospital Colorado, Aurora, Colorado, USA
| | - Paul Jedlicka
- Department of Pathology, University of Colorado, Denver, Colorado, USA
| | - Colm B Collins
- Mucosal Inflammation Program, School of Medicine, Aurora, Colorado, USA
| | - Ifor R Williams
- Department of Pathology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Jesús Rivera-Nieves
- Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California at San Diego, San Diego, California, USA
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Collins CB, Aherne CM, McNamee EN, Lebsack MDP, Eltzschig H, Jedlicka P, Rivera-Nieves J. Flt3 ligand expands CD103⁺ dendritic cells and FoxP3⁺ T regulatory cells, and attenuates Crohn's-like murine ileitis. Gut 2012; 61:1154-62. [PMID: 22068168 PMCID: PMC3684390 DOI: 10.1136/gutjnl-2011-300820] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
UNLABELLED BACKGROUND; Imprinting an effector or regulatory phenotype on naïve T cells requires education at induction sites by dendritic cells (DC). Objectives To analyse the effect of inflammation on the frequency of mononuclear phagocytes (MP) and the effect of altering their frequency by administration of Flt3-L in chronic ileitis. METHODS Using a tumour necrosis factor (TNF) driven model of ileitis (ie, TNFΔARE) that recapitulates many features of Crohn's disease (CD), dynamic changes in the frequency and functional state of MP within the inflamed ileum were assessed by flow cytometry, immunofluorescence and real-time reverse-transcription PCR and by generating CX(3)CR1 GFP-reporter TNFΔARE mice. The effect of Flt3-L supplementation on the severity of ileitis, and the frequency of CD103(+) DC and of FoxP3(+) regulatory T cells was also studied in TNFΔARE mice. RESULTS CD11c(Hi)/MHCII(+) MP accumulated in inflamed ilea, predominantly mediated by expansion of the CX(3)CR1(+) MP subpopulation. This coincided with a decreased pro-regulatory CD103(+) DC. The phenotype of these MP was that of activated cells, as they expressed increased CD80 and CD86 on their surface. Flt3-ligand administration resulted in a preferential expansion of CD103(+) DC that attenuated the severity of ileitis in 20-week-old TNFΔARE mice, mediated by increased CD4(+)/CD25(+)/FoxP3(+) regulatory T cells. CONCLUSIONS Results support a role for Flt3-L as a potential therapeutic agent in Crohn's-like ileitis.
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Affiliation(s)
- Colm B. Collins
- Mucosal Inflammation Program, Department of Internal Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Carol M. Aherne
- Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Eóin N. McNamee
- Mucosal Inflammation Program, Department of Internal Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Matthew D. P. Lebsack
- Mucosal Inflammation Program, Department of Internal Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Holger Eltzschig
- Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Paul Jedlicka
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Jesús Rivera-Nieves
- Inflammatory Bowel Disease Center, Division of Gastroenterology, University of California at San Diego, San Diego, California USA 92093
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Grenz A, Bauerle JD, Dalton JH, Ridyard D, Badulak A, Tak E, McNamee EN, Clambey E, Moldovan R, Reyes G, Klawitter J, Ambler K, Magee K, Christians U, Brodsky KS, Ravid K, Choi DS, Wen J, Lukashev D, Blackburn MR, Osswald H, Coe IR, Nürnberg B, Haase VH, Xia Y, Sitkovsky M, Eltzschig HK. Equilibrative nucleoside transporter 1 (ENT1) regulates postischemic blood flow during acute kidney injury in mice. J Clin Invest 2012; 122:693-710. [PMID: 22269324 DOI: 10.1172/jci60214] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 12/07/2011] [Indexed: 01/09/2023] Open
Abstract
A complex biologic network regulates kidney perfusion under physiologic conditions. This system is profoundly perturbed following renal ischemia, a leading cause of acute kidney injury (AKI) - a life-threatening condition that frequently complicates the care of hospitalized patients. Therapeutic approaches to prevent and treat AKI are extremely limited. Better understanding of the molecular pathways promoting postischemic reflow could provide new candidate targets for AKI therapeutics. Due to its role in adapting tissues to hypoxia, we hypothesized that extracellular adenosine has a regulatory function in the postischemic control of renal perfusion. Consistent with the notion that equilibrative nucleoside transporters (ENTs) terminate adenosine signaling, we observed that pharmacologic ENT inhibition in mice elevated renal adenosine levels and dampened AKI. Deletion of the ENTs resulted in selective protection in Ent1-/- mice. Comprehensive examination of adenosine receptor-knockout mice exposed to AKI demonstrated that renal protection by ENT inhibitors involves the A2B adenosine receptor. Indeed, crosstalk between renal Ent1 and Adora2b expressed on vascular endothelia effectively prevented a postischemic no-reflow phenomenon. These studies identify ENT1 and adenosine receptors as key to the process of reestablishing renal perfusion following ischemic AKI. If translatable from mice to humans, these data have important therapeutic implications.
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Affiliation(s)
- Almut Grenz
- Mucosal Inflammation Program, Department of Anesthesiology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado, USA
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Collins CB, Aherne CM, Kominsky D, McNamee EN, Lebsack MD, Eltzschig H, Jedlicka P, Rivera-Nieves J. Retinoic acid attenuates ileitis by restoring the balance between T-helper 17 and T regulatory cells. Gastroenterology 2011; 141:1821-31. [PMID: 22027263 PMCID: PMC3684415 DOI: 10.1053/j.gastro.2011.05.049] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 05/11/2011] [Accepted: 05/26/2011] [Indexed: 12/23/2022]
Abstract
BACKGROUND & AIMS Retinoic acid (RA), produced by intestinal epithelial cells (IECs) and dendritic cells (DCs) promotes the induction of regulatory T cells (Tregs) and decreases the induction of T-helper (Th)17 cells. METHODS We studied the roles of RA in mice that overproduce tumor necrosis factor (TNF) and develop chronic ileitis (TNF_ARE mice). We assessed the frequency and function of CD103+ DCs, Th17 cells, and Tregs by flow cytometry, and we measured expression of cytokines and retinaldehyde dehydrogenase (RALDH) enzymes in ileum samples, DCs, and IECs by real-time polymerase chain reaction. We quantified RA by electrochemical analysis and examined the effect of RA supplementation on TNF-induced ileitis using histologic, coculture, and suppression assays and flow cytometry. RESULTS Numbers of CD103+ DCs decreased in the inflamed ilea of mice with chronic disease; RA synthetic machinery (RALDH1,2) was down-regulated. Nevertheless, the proportion of CD4+, CD25+, FoxP3+ Tregs increased, indicating an alternate source for RA. IECs responded to reduced levels of RA by up-regulating RALDH3 in vivo and in vitro. Net tissue levels of RA remained lower in TNF+ARE than wild-type mice, indicating that epithelial up-regulation of RALDH3 could not maintain adequate concentrations of RA, probably because of loss of IEC mass. RA supplementation significantly attenuated disease by increasing the number and function of CD103+ DCs and Tregs and reducing Th17 cells. CONCLUSIONS Reduced levels of RA appear to induce IECs to up-regulate synthesis of RA. RA supplementation attenuates ileitis through its effects on CD103+ DCs, Tregs, and Th17 cells. RA supplementation might offer therapeutic benefit in Crohn's disease.
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Affiliation(s)
- Colm B. Collins
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Carol M. Aherne
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045,Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Douglas Kominsky
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045,Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Eóin N. McNamee
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Matthew D.P. Lebsack
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Holger Eltzschig
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045,Department of Anesthesiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Paul Jedlicka
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045
| | - Jesús Rivera-Nieves
- Mucosal Inflammation Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045,Division of Gastroenterology and Hepatology, University of California San Diego
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Masterson JC, McNamee EN, Jedlicka P, Fillon S, Ruybal J, Hosford L, Rivera-Nieves J, Lee JJ, Furuta GT. CCR3 Blockade Attenuates Eosinophilic Ileitis and Associated Remodeling. Am J Pathol 2011; 179:2302-14. [PMID: 21945903 DOI: 10.1016/j.ajpath.2011.07.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 07/07/2011] [Accepted: 07/26/2011] [Indexed: 01/12/2023]
Abstract
Intestinal remodeling and stricture formation is a complication of inflammatory bowel disease (IBD) that often requires surgical intervention. Although eosinophils are associated with mucosal remodeling in other organs and are increased in IBD tissues, their role in IBD-associated remodeling is unclear. Histological and molecular features of ileitis and remodeling were assessed using immunohistochemical, histomorphometric, flow cytometric, and molecular analysis (real-time RT-PCR) techniques in a murine model of chronic eosinophilic ileitis. Collagen protein was assessed by Sircol assay. Using a spontaneous eosinophilic Crohn's-like mouse model SAMP1/SkuSlc, we demonstrate an association between ileitis progression and remodeling over the course of 40 weeks. Mucosal and submucosal eosinophilia increased over the time course and correlated with increased histological inflammatory indices. Ileitis and remodeling increased over the 40 weeks, as did expression of fibronectin. CCR3-specific antibody-mediated reduction of eosinophils resulted in significant decrease in goblet cell hyperplasia, muscularis propria hypertrophy, villus blunting, and expression of inflammatory and remodeling genes, including fibronectin. Cellularity of local mesenteric lymph nodes, including T- and B-lymphocytes, was also significantly reduced. Thus, eosinophils participate in intestinal remodeling, supporting eosinophils as a novel therapeutic target.
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Affiliation(s)
- Joanne C Masterson
- Section of Pediatric Gastroenterology, Hepatology and Nutrition-Digestive Health Institute, Children's Hospital Colorado, Aurora, Colorado, USA
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