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Bonnereau J, Courau T, Asesio N, Salfati D, Bouhidel F, Corte H, Hamoudi S, Hammoudi N, Lavolé J, Vivier-Chicoteau J, Chardiny V, Maggiori L, Blery M, Remark R, Bonnafous C, Cattan P, Toubert A, Bhat P, Allez M, Aparicio T, Le Bourhis L. Autologous T cell responses to primary human colorectal cancer spheroids are enhanced by ectonucleotidase inhibition. Gut 2023; 72:699-709. [PMID: 35803702 DOI: 10.1136/gutjnl-2021-326553] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 06/29/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE T cells are major effectors of the antitumoural immune response. Their activation by tumour-associated antigens can unleash their proliferation and cytotoxic functions, leading to tumour cell elimination. However, tumour-related immunosuppressive mechanisms including the overexpression of immune checkpoints like programmed cell death protein-1 (PD-1), are also engaged, promoting immune escape. Current immunotherapies targeting these pathways have demonstrated weak efficacy in colorectal cancer (CRC). It is thus crucial to find new targets for immunotherapy in this cancer type. DESIGN In a prospective cohort of patients with CRC, we investigated the phenotype of tumour-related and non-tumour related intestinal T cells (n=44), particularly the adenosinergic pathway, correlating with clinical phenotype. An autologous coculture model was developed between patient-derived primary tumour spheroids and their autologous tumour-associated lymphocytes. We used this relevant model to assess the effects of CD39 blockade on the antitumour T cell response. RESULTS We show the increased expression of CD39, and its co-expression with PD-1, on tumour infiltrating T cells compared with mucosal lymphocytes. CD39 expression was higher in the right colon and early-stage tumours, thus defining a subset of patients potentially responsive to CD39 blockade. Finally, we demonstrate in autologous conditions that CD39 blockade triggers T cell infiltration and tumour spheroid destruction in cocultures. CONCLUSION In CRC, CD39 is strongly expressed on tumour infiltrating lymphocytes and its inhibition represents a promising therapeutic strategy for treating patients.
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Affiliation(s)
- Julie Bonnereau
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Tristan Courau
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Nicolas Asesio
- Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Delphine Salfati
- Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Fatiha Bouhidel
- Anatomopathology Department, Hôpital Saint-Louis, Paris, France
| | - Hélène Corte
- Digestive Surgery Department, Hôpital Saint-Louis, Paris, France
| | - Sarah Hamoudi
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Nassim Hammoudi
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France.,Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Julie Lavolé
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Justine Vivier-Chicoteau
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France.,Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Victor Chardiny
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Leon Maggiori
- Digestive Surgery Department, Hôpital Saint-Louis, Paris, France
| | | | | | | | - Pierre Cattan
- Digestive Surgery Department, Hôpital Saint-Louis, Paris, France
| | - Antoine Toubert
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
| | - Purnima Bhat
- Medical School, The Australian National University, Canberra, Australian Capital Territory, Australia.,Gastroenterology and Hepatology Unit, Canberra Hospital, Canberra, Australian Capital Territory, Australia
| | - Matthieu Allez
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France.,Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Thomas Aparicio
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France.,Department of Hepato-Gastroenterology, Hôpital Saint-Louis, Paris, France
| | - Lionel Le Bourhis
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Université de Paris, Paris, France
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Mejías-Luque R, Zöller J, Anderl F, Loew-Gil E, Vieth M, Adler T, Engler DB, Urban S, Browning JL, Müller A, Gerhard M, Heikenwalder M. Lymphotoxin β receptor signalling executes Helicobacter pylori-driven gastric inflammation in a T4SS-dependent manner. Gut 2017; 66:1369-1381. [PMID: 27196595 DOI: 10.1136/gutjnl-2015-310783] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [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: 09/23/2015] [Revised: 03/14/2016] [Accepted: 03/21/2016] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Lymphotoxin β receptor (LTβR) signalling has been implicated in inflammation-associated tumour development in different tissues. We have analysed the role of LTβR and alternative NF-κB signalling in Helicobacter pylori-mediated gastric inflammation and pathology. DESIGN We analysed several ligands and receptors of the alternative NF-κB pathway, RelB, p52 nuclear translocation and target genes in tissue samples of H. pylori-infected patients with different degrees of gastritis or early gastric tumours by in situ hybridisation, immunohistochemistry, Western blot and real-time PCR analyses. Molecular mechanisms involved in LTβR activation by H. pylori were assessed in vitro using human gastric cancer cell lines and distinct H. pylori isolates. The effects of blocking or agonistically activating LTβR on gastric pathology during challenge with a human pathogenic H. pylori strain were studied in a mouse model. RESULTS Among the tested candidates, LT was significantly increased and activated alternative NF-κB signalling was observed in the gastric mucosa of H. pylori-infected patients. H. pyloriinduced LTβR-ligand expression in a type IV secretion system-dependent but CagA-independent manner, resulting in activation of the alternative NF-κB pathway, which was further enhanced by blocking canonical NF-κB during infection. Blocking LTβR signalling in vivo suppressed H. pylori-driven gastritis, whereas LTβR activation in gastric epithelial cells of infected mice induced a broadened pro-inflammatory chemokine milieu, resulting in exacerbated pathology. CONCLUSIONS LTβR-triggered activation of alternative NF-κB signalling in gastric epithelial cells executes H. pylori-induced chronic gastritis, representing a novel target to restrict gastric inflammation and pathology elicited by H. pylori, while exclusively targeting canonical NF-κB may aggravate pathology by enhancing the alternative pathway.
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Affiliation(s)
- Raquel Mejías-Luque
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany.,German Centre for Infection Research (DZIF), partner site Munich, Munich, Germany
| | - Jessica Zöller
- Institut für Virologie, Technische Universität München, Helmholtz Zentrum München, Neuherberg, Germany
| | - Florian Anderl
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany
| | - Elena Loew-Gil
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany
| | - Michael Vieth
- Institut für Pathologie, Klinikum Bayreuth, Bayreuth, Germany
| | - Thure Adler
- Immunology Screen, German Mouse Clinic, Helmholtz Zentrum München, Neuherberg, Germany
| | - Daniela B Engler
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Sabine Urban
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | | | - Anne Müller
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Markus Gerhard
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany.,German Centre for Infection Research (DZIF), partner site Munich, Munich, Germany
| | - Mathias Heikenwalder
- Institut für Virologie, Technische Universität München, Helmholtz Zentrum München, Neuherberg, Germany.,Division of Chronic Inflammation and Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
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Whelan KA, Merves JF, Giroux V, Tanaka K, Guo A, Chandramouleeswaran PM, Benitez AJ, Dods K, Que J, Masterson JC, Fernando SD, Godwin BC, Klein-Szanto AJ, Chikwava K, Ruchelli ED, Hamilton KE, Muir AB, Wang ML, Furuta GT, Falk GW, Spergel JM, Nakagawa H. Autophagy mediates epithelial cytoprotection in eosinophilic oesophagitis. Gut 2017; 66:1197-1207. [PMID: 26884425 PMCID: PMC4987278 DOI: 10.1136/gutjnl-2015-310341] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 01/05/2016] [Accepted: 01/27/2016] [Indexed: 01/01/2023]
Abstract
OBJECTIVE The influence of eosinophilic oesophagitis (EoE)-associated inflammation upon oesophageal epithelial biology remains poorly understood. We investigated the functional role of autophagy in oesophageal epithelial cells (keratinocytes) exposed to the inflammatory EoE milieu. DESIGN Functional consequences of genetic or pharmacological autophagy inhibition were assessed in endoscopic oesophageal biopsies, human oesophageal keratinocytes, single cell-derived ex vivo murine oesophageal organoids as well as a murine model recapitulating EoE-like inflammation and basal cell hyperplasia. Gene expression, morphological and functional characterisation of autophagy and oxidative stress were performed by transmission electron microscopy, immunostaining, immunoblotting, live cell imaging and flow cytometry. RESULTS EoE-relevant inflammatory conditions promoted autophagy and basal cell hyperplasia in three independent murine EoE models and oesophageal organoids. Inhibition of autophagic flux via chloroquine treatment augmented basal cell hyperplasia in these model systems. Oesophageal keratinocytes stimulated with EoE-relevant cytokines, including tumour necrosis factor-α and interleukin-13 exhibited activation of autophagic flux in a reactive oxygen species-dependent manner. Autophagy inhibition via chloroquine treatment or depletion of Beclin-1 or ATG-7, augmented oxidative stress induced by EoE-relevant stimuli in murine EoE, oesophageal organoids and human oesophageal keratinocytes. Oesophageal epithelia of paediatric EoE patients with active inflammation displayed increased autophagic vesicle content compared with normal and EoE remission subjects. Functional flow cytometric analysis revealed autophagic flux in human oesophageal biopsies. CONCLUSIONS Our findings reveal for the first time that autophagy may function as a cytoprotective mechanism to maintain epithelial redox balance and homeostasis under EoE inflammation-associated stress, providing mechanistic insights into the role of autophagy in EoE pathogenesis.
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Affiliation(s)
- Kelly A. Whelan
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Jamie F. Merves
- Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Veronique Giroux
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Koji Tanaka
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Andy Guo
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Prasanna M. Chandramouleeswaran
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Alain J. Benitez
- Division of Allergy and Immunology, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Kara Dods
- Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Jianwen Que
- Center for Human Development and Division of Digestive and Liver Diseases, Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Joanne C. Masterson
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, University of Colorado Denver School of Medicine Aurora, Colorado, USA
| | - Shahan D. Fernando
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, University of Colorado Denver School of Medicine Aurora, Colorado, USA
| | - Bridget C. Godwin
- Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Andres J. Klein-Szanto
- Histopathology Facility and Cancer Biology Program, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
| | - Kudakwashe Chikwava
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, Perelman School of Medicine at the University of Pennsylvania, PA 19104, USA
| | - Eduardo D. Ruchelli
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, Perelman School of Medicine at the University of Pennsylvania, PA 19104, USA
| | - Kathryn E. Hamilton
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
| | - Amanda B. Muir
- Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Mei-Lun Wang
- Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Glenn T. Furuta
- Section of Pediatric Gastroenterology, Hepatology and Nutrition, Digestive Health Institute, University of Colorado Denver School of Medicine Aurora, Colorado, USA
| | - Gary W. Falk
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Jonathan M. Spergel
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
- Division of Allergy and Immunology, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Hiroshi Nakagawa
- Gastroenterology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- University of Pennsylvania Abramson Cancer Center, Philadelphia, PA 19104, USA
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Jeong Y, Rhee H, Martin S, Klass D, Lin Y, Nguyen LXT, Feng W, Diehn M. Identification and genetic manipulation of human and mouse oesophageal stem cells. Gut 2016; 65:1077-86. [PMID: 25897018 DOI: 10.1136/gutjnl-2014-308491] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 09/23/2014] [Accepted: 03/28/2015] [Indexed: 12/08/2022]
Abstract
OBJECTIVE Human oesophageal stem cell research is hampered by the lack of an optimal assay system to study self-renewal and differentiation. We aimed to identify and characterise human and mouse oesophageal stem/progenitor cells by establishing 3-dimensional organotypic sphere culture systems for both species. DESIGN Primary oesophageal epithelial cells were freshly isolated and fluorescence-activated cell sorting (FACS)-sorted from human and mouse oesophagus and 3-dimensional organotypic sphere culture systems were developed. The self-renewing potential and differentiation status of novel subpopulations were assessed by sphere-forming ability, cell cycle analysis, immunostaining, qPCR and RNA-Seq. RESULTS Primary human and mouse oesophageal epithelial cells clonally formed esophagospheres consisting of stratified squamous epithelium. Sphere-forming cells could self-renew and form esophagospheres for over 43 passages in vitro and generated stratified squamous epithelium when transplanted under the kidney capsule of immunodeficient mice. Sphere-forming cells were 10-15-fold enriched among human CD49f(hi)CD24(low) cells and murine CD49f(+)CD24(low)CD71(low) cells compared with the most differentiated cells. Genetic elimination of p63 in mouse and human oesophageal cells dramatically decreased esophagosphere formation and basal gene expression while increasing suprabasal gene expression. CONCLUSIONS We developed clonogenic and organotypic culture systems for the quantitative analyses of human and mouse oesophageal stem/progenitor cells and identified novel cell surface marker combinations that enrich for these cells. Using this system, we demonstrate that elimination of p63 inhibits self-renewal of human oesophageal stem/progenitor cells. We anticipate that these esophagosphere culture systems will facilitate studies of oesophageal stem cell biology and may prove useful for ex vivo expansion of human oesophageal stem cells.
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Affiliation(s)
- Youngtae Jeong
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Horace Rhee
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California, USA
| | - Shanique Martin
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Daniel Klass
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Yuan Lin
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Le Xuan Truong Nguyen
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Weiguo Feng
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Maximilian Diehn
- Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California, USA
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VanDussen KL, Marinshaw JM, Shaikh N, Miyoshi H, Moon C, Tarr PI, Ciorba MA, Stappenbeck TS. Development of an enhanced human gastrointestinal epithelial culture system to facilitate patient-based assays. Gut 2015; 64:911-20. [PMID: 25007816 PMCID: PMC4305344 DOI: 10.1136/gutjnl-2013-306651] [Citation(s) in RCA: 350] [Impact Index Per Article: 38.9] [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: 12/19/2013] [Accepted: 06/06/2014] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The technology for the growth of human intestinal epithelial cells is rapidly progressing. An exciting possibility is that this system could serve as a platform for individualised medicine and research. However, to achieve this goal, human epithelial culture must be enhanced so that biopsies from individuals can be used to reproducibly generate cell lines in a short time frame so that multiple, functional assays can be performed (ie, barrier function and host-microbial interactions). DESIGN We created a large panel of human gastrointestinal epithelial cell lines (n=65) from patient biopsies taken during routine upper and lower endoscopy procedures. Proliferative stem/progenitor cells were rapidly expanded using a high concentration of conditioned media containing the factors critical for growth (Wnt3a, R-spondin and Noggin). A combination of lower conditioned media concentration and Notch inhibition was used to differentiate these cells for additional assays. RESULTS We obtained epithelial lines from all accessible tissue sites within 2 weeks of culture. The intestinal cell lines were enriched for stem cell markers and rapidly grew as spheroids that required passage at 1:3-1:4 every 3 days. Under differentiation conditions, intestinal epithelial spheroids showed region-specific development of mature epithelial lineages. These cells formed functional, polarised monolayers covered by a secreted mucus layer when grown on Transwell membranes. Using two-dimensional culture, these cells also demonstrated novel adherence phenotypes with various strains of pathogenic Escherichia coli. CONCLUSIONS This culture system will facilitate the study of interindividual, functional studies of human intestinal epithelial cells, including host-microbial interactions.
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Affiliation(s)
- Kelli L VanDussen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jeffrey M Marinshaw
- Department of Internal Medicine (Division of Gastroenterology), Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Nurmohammad Shaikh
- Department of Pediatrics (Division of Gastroenterology, Hepatology and Nutrition), Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hiroyuki Miyoshi
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Clara Moon
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Phillip I Tarr
- Department of Pediatrics (Division of Gastroenterology, Hepatology and Nutrition), Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Matthew A Ciorba
- Department of Internal Medicine (Division of Gastroenterology), Washington University School of Medicine, St. Louis, MO 63110, USA,Corresponding Authors: Thaddeus S. Stappenbeck, 660 S. Euclid, Box 8118, St. Louis, MO 63110, Phone: 314-362-4214, . Matthew A. Ciorba, 660 S. Euclid, Box 8124, St. Louis, MO 63110, Phone: 314-362-9054,
| | - Thaddeus S Stappenbeck
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA,Corresponding Authors: Thaddeus S. Stappenbeck, 660 S. Euclid, Box 8118, St. Louis, MO 63110, Phone: 314-362-4214, . Matthew A. Ciorba, 660 S. Euclid, Box 8124, St. Louis, MO 63110, Phone: 314-362-9054,
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Huo X, Zhang X, Yu C, Zhang Q, Cheng E, Wang DH, Pham TH, Spechler SJ, Souza RF. In oesophageal squamous cells exposed to acidic bile salt medium, omeprazole inhibits IL-8 expression through effects on nuclear factor-κB and activator protein-1. Gut 2014; 63:1042-52. [PMID: 24048734 PMCID: PMC3959621 DOI: 10.1136/gutjnl-2013-305533] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Oesophagitis might result from the effects of chemokines produced by oesophageal cells in response to gastro-oesophageal reflux, and not solely from the direct, caustic effects of refluxed gastric juice. Proton pump inhibitors (PPI) can block chemokine production through mechanisms independent of their antisecretory effects. We studied omeprazole effects on chemokine production by oesophageal epithelial cells exposed to acidic bile salts. DESIGN Human primary and telomerase-immortalised oesophageal squamous cells were exposed to acidic bile salt medium with or without omeprazole pretreatment. Interleukin (IL)-8 expression was determined by RT-PCR and ELISA. IL-8 promoter activity was measured by luciferase reporter assay. Binding of NF-κB and AP-1 subunits to the IL-8 promoter was assessed by chromatin immunoprecipitation (ChIP) assay. Immune cell migration induced by conditioned medium was determined by a double-chamber migration assay system. RESULTS Acidic bile salt medium caused oesophageal epithelial cells to express IL-8 mRNA and protein by activating the IL-8 promoter through NF-κB and AP-1 binding. Omeprazole inhibited that acidic bile salt-stimulated IL-8 expression by blocking the nuclear translocation of p65 (an NF-κB subunit), and by blocking the binding of p65, c-jun and c-fos (AP-1 subunits) to the IL-8 promoter. Omeprazole also blocked the ability of conditioned medium from cells exposed to acidic bile salts to induce immune cell migration. CONCLUSIONS In oesophageal squamous epithelial cells, omeprazole inhibits IL-8 expression through effects on NF-κB and AP-1 that are entirely independent of effects on gastric acid secretion. These previously unrecognised PPI effects might contribute to the healing of reflux oesophagitis.
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Affiliation(s)
- Xiaofang Huo
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Xi Zhang
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Chunhua Yu
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Qiuyang Zhang
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Edaire Cheng
- Department of Pediatrics, Children’s Medical Center and the University of Texas Southwestern Medical Center, Dallas, Texas
| | - David H. Wang
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Thai H. Pham
- Department of Surgery, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Stuart J. Spechler
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
| | - Rhonda F. Souza
- Department of Internal Medicine, VA North Texas Health Care System and the University of Texas Southwestern Medical School, Dallas, Texas
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