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Hanusrichterova J, Kolomaznik M, Barosova R, Adamcakova J, Mokra D, Mokry J, Skovierova H, Kelly MM, de Heuvel E, Wiehler S, Proud D, Shen H, Mukherjee PG, Amrein MW, Calkovska A. Pulmonary surfactant and prostaglandin E 2 in airway smooth muscle relaxation of human and male guinea pigs. Physiol Rep 2024; 12:e70026. [PMID: 39245804 PMCID: PMC11381196 DOI: 10.14814/phy2.70026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 08/12/2024] [Accepted: 08/22/2024] [Indexed: 09/10/2024] Open
Abstract
Pulmonary surfactant serves as a barrier to respiratory epithelium but can also regulate airway smooth muscle (ASM) tone. Surfactant (SF) relaxes contracted ASM, similar to β2-agonists, anticholinergics, nitric oxide, and prostanoids. The exact mechanism of surfactant relaxation and whether surfactant relaxes hyperresponsive ASM remains unknown. Based on previous research, relaxation requires an intact epithelium and prostanoid synthesis. We sought to examine the mechanisms by which surfactant causes ASM relaxation. Organ bath measurements of isometric tension of ASM of guinea pigs in response to exogenous surfactant revealed that surfactant reduces tension of healthy and hyperresponsive tracheal tissue. The relaxant effect of surfactant was reduced if prostanoid synthesis was inhibited and/or if prostaglandin E2-related EP2 receptors were antagonized. Atomic force microscopy revealed that human ASM cells stiffen during contraction and soften during relaxation. Surfactant softened ASM cells, similarly to the known bronchodilator prostaglandin E2 (PGE2) and the cell softening was abolished when EP4 receptors for PGE2 were antagonized. Elevated levels of PGE2 were found in cultures of normal human bronchial epithelial cells exposed to pulmonary surfactant. We conclude that prostaglandin E2 and its EP2 and EP4 receptors are likely involved in the relaxant effect of pulmonary surfactant in airways.
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Grants
- APVV-17-0250 Agentúra na Podporu Výskumu a Vývoja (APVV)
- VEGA 1/0055/19 Vedecká Grantová Agentúra MŠVVaŠ SR a SAV (VEGA)
- 26246 Ministerstvo školstva, vedy, výskumu a športu SR | Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic for the Structural Funds of EU)
- 34237 Ministerstvo školstva, vedy, výskumu a športu SR | Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic for the Structural Funds of EU)
- University of Calgary (U of C)
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Affiliation(s)
- J Hanusrichterova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - M Kolomaznik
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - R Barosova
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - J Adamcakova
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - D Mokra
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - J Mokry
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - H Skovierova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - M M Kelly
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - E de Heuvel
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - S Wiehler
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - D Proud
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - H Shen
- Department of Mathematics and Statistics, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - P G Mukherjee
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - M W Amrein
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - A Calkovska
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
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2
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Alhallak K, Nagai J, Zaleski K, Marshall S, Salloum T, Derakhshan T, Hayashi H, Feng C, Kratchmarov R, Lai J, Kuchibhotla V, Nishida A, Balestrieri B, Laidlaw T, Dwyer DF, Boyce JA. Mast cells control lung type 2 inflammation via prostaglandin E 2-driven soluble ST2. Immunity 2024; 57:1274-1288.e6. [PMID: 38821053 PMCID: PMC11168874 DOI: 10.1016/j.immuni.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 01/26/2024] [Accepted: 05/06/2024] [Indexed: 06/02/2024]
Abstract
Severe asthma and sinus disease are consequences of type 2 inflammation (T2I), mediated by interleukin (IL)-33 signaling through its membrane-bound receptor, ST2. Soluble (s)ST2 reduces available IL-33 and limits T2I, but little is known about its regulation. We demonstrate that prostaglandin E2 (PGE2) drives production of sST2 to limit features of lung T2I. PGE2-deficient mice display diminished sST2. In humans with severe respiratory T2I, urinary PGE2 metabolites correlate with serum sST2. In mice, PGE2 enhanced sST2 secretion by mast cells (MCs). Mice lacking MCs, ST2 expression by MCs, or E prostanoid (EP)2 receptors by MCs showed reduced sST2 lung concentrations and strong T2I. Recombinant sST2 reduced T2I in mice lacking PGE2 or ST2 expression by MCs back to control levels. PGE2 deficiency also reversed the hyperinflammatory phenotype in mice lacking ST2 expression by MCs. PGE2 thus suppresses T2I through MC-derived sST2, explaining the severe T2I observed in low PGE2 states.
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Affiliation(s)
- Kinan Alhallak
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Jun Nagai
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Kendall Zaleski
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Sofia Marshall
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tamara Salloum
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tahereh Derakhshan
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Hiroaki Hayashi
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Chunli Feng
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Radomir Kratchmarov
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Juying Lai
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Virinchi Kuchibhotla
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Airi Nishida
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Barbara Balestrieri
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tanya Laidlaw
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Daniel F Dwyer
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Joshua A Boyce
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA.
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3
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The role of PGE2 and EP receptors on lung's immune and structural cells; possibilities for future asthma therapy. Pharmacol Ther 2023; 241:108313. [PMID: 36427569 DOI: 10.1016/j.pharmthera.2022.108313] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 10/06/2022] [Accepted: 11/17/2022] [Indexed: 11/27/2022]
Abstract
Asthma is the most common airway chronic disease with treatments aimed mainly to control the symptoms. Adrenergic receptor agonists, corticosteroids and anti-leukotrienes have been used for decades, and the development of more targeted asthma treatments, known as biological therapies, were only recently established. However, due to the complexity of asthma and the limited efficacy as well as the side effects of available treatments, there is an urgent need for a new generation of asthma therapies. The anti-inflammatory and bronchodilatory effects of prostaglandin E2 in asthma are promising, yet complicated by undesirable side effects, such as cough and airway irritation. In this review, we summarize the most important literature on the role of all four E prostanoid (EP) receptors on the lung's immune and structural cells to further dissect the relevance of EP2/EP4 receptors as potential targets for future asthma therapy.
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4
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Sanchez-Trincado JL, Pelaez-Prestel HF, Lafuente EM, Reche PA. Human Oral Epithelial Cells Suppress T Cell Function via Prostaglandin E2 Secretion. Front Immunol 2022; 12:740613. [PMID: 35126344 PMCID: PMC8807503 DOI: 10.3389/fimmu.2021.740613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 12/15/2021] [Indexed: 11/13/2022] Open
Abstract
The oral mucosa is constantly exposed to a plethora of stimuli including food antigens, commensal microbiota and pathogens, requiring distinct immune responses. We previously reported that human oral epithelial cells (OECs) suppress immune responses to bacteria, using H413 and TR146 OEC lines and primary OECs in co-culture with dendritic cells (DCs) and T cells (OEC-conditioned cells). OECs reduced DCs expression of CD80/CD86 and IL-12/TNFα release and impaired T cell activation. Here, we further evaluated the immunosuppression by these OECs and investigated the underlying mechanisms. OEC-conditioned DCs did not induce CD4 T cell polarization towards Treg, judging by the absence of FoxP3 expression. OECs also repressed T-bet/IFNγ expression in CD4 and CD8 T cells activated by DCs or anti-CD3/CD28 antibodies. This inhibition depended on OEC:T cell ratio and IFNγ repression occurred at the transcriptional level. Time-lapse experiments showed that OECs inhibited early steps of T cell activation, consistent with OECs inability to suppress T cells stimulated with PMA/ionomycin. Blocking CD40/CD40L, CD58/CD2 and PD-L1/PD-1 interactions with specific antibodies did not disrupt T cell suppression by OECs. However, preventing prostaglandin E2 (PGE2) synthesis or blocking PGE2 binding to the cognate EP2/EP4 receptors, restored IFNγ and TNFα production in OEC-conditioned T cells. Finally, treating OECs with poly(I:C), which simulates viral infections, limited T cell suppression. Overall, these results point to an inherent ability of OECs to suppress immune responses, which can nonetheless be eluded when OECs are under direct assault.
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5
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Lin YJ, Flaczyk A, Wolfheimer S, Goretzki A, Jamin A, Wangorsch A, Vieths S, Scheurer S, Schülke S. The Fusion Protein rFlaA:Betv1 Modulates DC Responses by a p38-MAPK and COX2-Dependent Secretion of PGE 2 from Epithelial Cells. Cells 2021; 10:3415. [PMID: 34943923 PMCID: PMC8700022 DOI: 10.3390/cells10123415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/26/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022] Open
Abstract
Developing new adjuvants/vaccines and better understanding their mode-of-action is an important task. To specifically improve birch pollen allergy treatment, we designed a fusion protein consisting of major birch pollen allergen Betv1 conjugated to the TLR5-ligand flagellin (rFlaA:Betv1). This study investigates the immune-modulatory effects of rFlaA:Betv1 on airway epithelial cells. LA-4 mouse lung epithelial cells were stimulated with rFlaA:Betv1 in the presence/absence of various inhibitors with cytokine- and chemokine secretion quantified by ELISA and activation of intracellular signaling cascades demonstrated by Western blot (WB). Either LA-4 cells or LA-4-derived supernatants were co-cultured with BALB/c bone marrow-derived myeloid dendritic cells (mDCs). Compared to equimolar amounts of flagellin and Betv1 provided as a mixture, rFlaA:Betv1 induced higher secretion of IL-6 and the chemokines CCL2 and CCL20 from LA-4 cells and a pronounced MAPK- and NFκB-activation. Mechanistically, rFlaA:Betv1 was taken up more strongly and the induced cytokine production was inhibited by NFκB-inhibitors, while ERK- and p38-MAPK-inhibitors only suppressed IL-6 and CCL2 secretion. In co-cultures of LA-4 cells with mDCs, rFlaA:Betv1-stimulated LA-4 cells p38-MAPK- and COX2-dependently secreted PGE2, which modulated DC responses by suppressing pro-inflammatory IL-12 and TNF-α secretion. Taken together, these results contribute to our understanding of the mechanisms underlying the strong immune-modulatory effects of flagellin-containing fusion proteins.
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Affiliation(s)
- Yen-Ju Lin
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Adam Flaczyk
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Sonja Wolfheimer
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Alexandra Goretzki
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Annette Jamin
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Andrea Wangorsch
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Stefan Vieths
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Stephan Scheurer
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
| | - Stefan Schülke
- Molecular Allergology, Paul-Ehrlich-Institut, 63225 Langen, Germany; (Y.-J.L.); (A.F.); (S.W.); (A.G.); (A.J.); (A.W.); (S.V.); (S.S.)
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6
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Kountz TS, Jairaman A, Kountz CD, Stauderman KA, Schleimer RP, Prakriya M. Differential Regulation of ATP- and UTP-Evoked Prostaglandin E 2 and IL-6 Production from Human Airway Epithelial Cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2021; 207:1275-1287. [PMID: 34389624 PMCID: PMC8816324 DOI: 10.4049/jimmunol.2100127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/07/2021] [Indexed: 11/19/2022]
Abstract
The airway epithelial cells (AECs) lining the conducting passageways of the lung secrete a variety of immunomodulatory factors. Among these, PGE2 limits lung inflammation and promotes bronchodilation. By contrast, IL-6 drives intense airway inflammation, remodeling, and fibrosis. The signaling that differentiates the production of these opposing mediators is not understood. In this study, we find that the production of PGE2 and IL-6 following stimulation of human AECs by the damage-associated molecular pattern extracellular ATP shares a common requirement for Ca2+ release-activated Ca2+ (CRAC) channels. ATP-mediated synthesis of PGE2 required activation of metabotropic P2Y2 receptors and CRAC channel-mediated cytosolic phospholipase A2 signaling. By contrast, ATP-evoked synthesis of IL-6 occurred via activation of ionotropic P2X receptors and CRAC channel-mediated calcineurin/NFAT signaling. In contrast to ATP, which elicited the production of both PGE2 and IL-6, the uridine nucleotide, UTP, stimulated PGE2 but not IL-6 production. These results reveal that human AECs employ unique receptor-specific signaling mechanisms with CRAC channels as a signaling nexus to regulate release of opposing immunomodulatory mediators. Collectively, our results identify P2Y2 receptors, CRAC channels, and P2X receptors as potential intervention targets for airway diseases.
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Affiliation(s)
- Timothy S Kountz
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Amit Jairaman
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Candace D Kountz
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | - Robert P Schleimer
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Murali Prakriya
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL;
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
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Rodriguez-Rodriguez N, Gogoi M, McKenzie AN. Group 2 Innate Lymphoid Cells: Team Players in Regulating Asthma. Annu Rev Immunol 2021; 39:167-198. [PMID: 33534604 PMCID: PMC7614118 DOI: 10.1146/annurev-immunol-110119-091711] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Type 2 immunity helps protect the host from infection, but it also plays key roles in tissue homeostasis, metabolism, and repair. Unfortunately, inappropriate type 2 immune reactions may lead to allergy and asthma. Group 2 innate lymphoid cells (ILC2s) in the lungs respond rapidly to local environmental cues, such as the release of epithelium-derived type 2 initiator cytokines/alarmins, producing type 2 effector cytokines such as IL-4, IL-5, and IL-13 in response to tissue damage and infection. ILC2s are associated with the severity of allergic asthma, and experimental models of lung inflammation have shown how they act as playmakers, receiving signals variously from stromal and immune cells as well as the nervous system and then distributing cytokine cues to elicit type 2 immune effector functions and potentiate CD4+ T helper cell activation, both of which characterize the pathology of allergic asthma. Recent breakthroughs identifying stromal- and neuronal-derived microenvironmental cues that regulate ILC2s, along with studies recognizing the potential plasticity of ILC2s, have improved our understanding of the immunoregulation of asthma and opened new avenues for drug discovery.
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Affiliation(s)
- Noe Rodriguez-Rodriguez
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK
| | - Mayuri Gogoi
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK
| | - Andrew N.J. McKenzie
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK,Corresponding author:
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8
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Croasdell Lucchini A, Gachanja NN, Rossi AG, Dorward DA, Lucas CD. Epithelial Cells and Inflammation in Pulmonary Wound Repair. Cells 2021; 10:339. [PMID: 33562816 PMCID: PMC7914803 DOI: 10.3390/cells10020339] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/15/2021] [Accepted: 01/30/2021] [Indexed: 12/15/2022] Open
Abstract
Respiratory diseases are frequently characterised by epithelial injury, airway inflammation, defective tissue repair, and airway remodelling. This may occur in a subacute or chronic context, such as asthma and chronic obstructive pulmonary disease, or occur acutely as in pathogen challenge and acute respiratory distress syndrome (ARDS). Despite the frequent challenge of lung homeostasis, not all pulmonary insults lead to disease. Traditionally thought of as a quiescent organ, emerging evidence highlights that the lung has significant capacity to respond to injury by repairing and replacing damaged cells. This occurs with the appropriate and timely resolution of inflammation and concurrent initiation of tissue repair programmes. Airway epithelial cells are key effectors in lung homeostasis and host defence; continual exposure to pathogens, toxins, and particulate matter challenge homeostasis, requiring robust defence and repair mechanisms. As such, the epithelium is critically involved in the return to homeostasis, orchestrating the resolution of inflammation and initiating tissue repair. This review examines the pivotal role of pulmonary airway epithelial cells in initiating and moderating tissue repair and restitution. We discuss emerging evidence of the interactions between airway epithelial cells and candidate stem or progenitor cells to initiate tissue repair as well as with cells of the innate and adaptive immune systems in driving successful tissue regeneration. Understanding the mechanisms of intercellular communication is rapidly increasing, and a major focus of this review includes the various mediators involved, including growth factors, extracellular vesicles, soluble lipid mediators, cytokines, and chemokines. Understanding these areas will ultimately identify potential cells, mediators, and interactions for therapeutic targeting.
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Affiliation(s)
| | | | | | | | - Christopher D. Lucas
- University of Edinburgh Centre for Inflammation Research, Queen’s Medical Research Institute, Edinburgh Bioquarter, Edinburgh EH16 4TJ, UK; (A.C.L.); (N.N.G.); (A.G.R.); (D.A.D.)
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9
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Ferraro VA, Carraro S, Pirillo P, Gucciardi A, Poloniato G, Stocchero M, Giordano G, Zanconato S, Baraldi E. Breathomics in Asthmatic Children Treated with Inhaled Corticosteroids. Metabolites 2020; 10:metabo10100390. [PMID: 33003349 PMCID: PMC7600137 DOI: 10.3390/metabo10100390] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/21/2020] [Accepted: 09/26/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND "breathomics" enables indirect analysis of metabolic patterns underlying a respiratory disease. In this study, we analyze exhaled breath condensate (EBC) in asthmatic children before (T0) and after (T1) a three-week course of inhaled beclomethasone dipropionate (BDP). METHODS we recruited steroid-naive asthmatic children for whom inhaled steroids were indicated and healthy children, evaluating asthma control, spirometry and EBC (in asthmatics at T0 and T1). A liquid-chromatography-mass-spectrometry untargeted analysis was applied to EBC and a mass spectrometry-based target analysis to urine samples. RESULTS metabolomic analysis discriminated asthmatic (n = 26) from healthy children (n = 16) at T0 and T1, discovering 108 and 65 features relevant for the discrimination, respectively. Searching metabolomics databases, seven putative biomarkers with a plausible role in asthma biochemical-metabolic processes were found. After BDP treatment, asthmatic children, in the face of an improved asthma control (p < 0.001) and lung function (p = 0.01), showed neither changes in EBC metabolomic profile nor in urinary endogenous steroid profile. CONCLUSIONS "breathomics" can discriminate asthmatic from healthy children, with prostaglandin, fatty acid and glycerophospholipid as putative markers. The three-week course of BDP-in spite of a significant clinical improvement-was not associated with changes in EBC metabolic arrangement and urinary steroid profile.
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Affiliation(s)
- Valentina Agnese Ferraro
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Correspondence:
| | - Silvia Carraro
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
| | - Paola Pirillo
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
| | - Antonina Gucciardi
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
| | - Gabriele Poloniato
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
| | - Matteo Stocchero
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
| | - Giuseppe Giordano
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
| | - Stefania Zanconato
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
| | - Eugenio Baraldi
- Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy; (S.C.); (P.P.); (A.G.); (G.P.); (M.S.); (G.G.); (S.Z.); (E.B.)
- Institute of Pediatric Research (IRP), Fondazione Città della Speranza, 35128 Padova, Italy
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10
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Jang BK, Lee JW, Choi H, Yim SV. Aronia melanocarpa Fruit Bioactive Fraction Attenuates LPS-Induced Inflammatory Response in Human Bronchial Epithelial Cells. Antioxidants (Basel) 2020; 9:antiox9090816. [PMID: 32887408 PMCID: PMC7554917 DOI: 10.3390/antiox9090816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 01/06/2023] Open
Abstract
To demonstrate the anti-inflammatory activity of Aronia melanocarpa fruit extract, human bronchial epithelial cells (BEAS-2B) were treated with lipopolysaccharide (LPS) and the effects of aronia bioactive fraction (ABF®), anthocyanin enriched extract from the fruit of A. melanocarpa, were evaluated. Following pretreatment with ABF® at 10–25 µg /mL, BEAS-2B cells were exposed to LPS and the expression of inflammatory mediators (tumor necrosis factor [TNF]-α, interleukin [IL]-6, IL-8, regulated upon activation, normal T cell expressed and presumably secreted [RANTES], IL-1β, cyclooxygenase-2 [COX-2], and inducible nitric oxide synthase [iNOS]) was analyzed. In LPS-stimulated BEAS-2B cells, ABF® pretreatment significantly decreased the mRNA expression of TNF-α, IL-6, IL-8, RANTES, IL-1β, and COX-2 at doses of 10 and 25 µg/mL. ABF® also attenuated the secretion of TNF- α, IL-6, IL-8, and RANTES protein, as demonstrated by enzyme linked immunosorbent assay. Western blot analyses revealed the decreased expression of COX-2 and iNOS following ABF® treatment. ROS production was decreased, and the cell cycle was arrested at the G0/G1 and S phases following ABF® pretreatment. Our results suggest that ABF® may have potential as a nutraceutical agent for the suppression of airway inflammation.
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Affiliation(s)
- Bong-Keun Jang
- Department of Medicine, Graduate School, Kyung Hee University, Seoul 02453, Korea;
| | - Jin-Woo Lee
- Medical Science Research Institute, Kyung Hee University Medical Center, Seoul 02447, Korea;
| | - Hyun Choi
- Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul 02447, Korea;
| | - Sung-Vin Yim
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul 02447, Korea
- Correspondence: ; Fax: +82-2-968-0560
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11
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Pelst MP, Höbart C, Wallaeys C, De Rooster H, Gansemans Y, Van Nieuwerburgh F, Devriendt B, Cox E. Adjuvanting Allergen Extracts for Sublingual Immunotherapy: Calcitriol Downregulates CXCL8 Production in Primary Sublingual Epithelial Cells. Front Immunol 2020; 11:1033. [PMID: 32582164 PMCID: PMC7295906 DOI: 10.3389/fimmu.2020.01033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 04/29/2020] [Indexed: 12/23/2022] Open
Abstract
Application of allergens onto the sublingual epithelium is used to desensitize allergic individuals, a treatment known as sublingual immunotherapy. However, the response of sublingual epithelial cells to house dust mite allergen and potential tolerance-promoting adjuvants such as Toll-like receptor (TLR) ligands and calcitriol has not been investigated. In order to study this, primary sublingual epithelial cells were isolated from dogs and cultured in vitro. After 24-h incubation with a Dermatophagoides farinae extract, a Dermatophagoides pteronyssinus extract, TLR2 ligands (FSL-1, heat-killed Listeria monocytogenes, Pam3CSK4), a TLR3 ligand (poly I:C), a TLR4 ligand [lipopolysaccharide (LPS)], and calcitriol (1,25-dihydroxyvitamin D3), viability of the cells was analyzed using an MTT test, and their secretion of interleukin 6 (IL-6), IL-10, CXCL8, and transforming growth factor β1 (TGF-β1) was measured by enzyme-linked immunosorbent assay. Additionally, to evaluate its potential effect as an adjuvant, sublingual epithelial cells were incubated with calcitriol in combination with a D. farinae extract followed by measurement of CXCL8 secretion. Furthermore, the effect of D. farinae and calcitriol on the transcriptome was assessed by RNA sequencing. The viability of the sublingual epithelial cells was significantly decreased by poly I:C, but not by the other stimuli. CXCL8 secretion was significantly increased by D. farinae extract and all TLR ligands apart from LPS. Calcitriol significantly decreased CXCL8 secretion, and coadministration with D. farinae extract reduced CXCL8 concentrations to levels seen in unstimulated sublingual epithelial cells. Although detectable, TGF-β1 secretion could not be modulated by any of the stimuli. Interleukin 6 and IL-10 could not be detected at the protein or at the mRNA level. It can be concluded that a D. farinae extract and TLR ligands augment the secretion of the proinflammatory chemokine CXCL8, which might interfere with sublingual desensitization. On the other hand, CXCL8 secretion was reduced by coapplication of calcitriol and a D. farinae extract. Calcitriol therefore seems to be a suitable candidate to be used as adjuvant during sublingual immunotherapy.
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Affiliation(s)
- Michael P Pelst
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Clara Höbart
- Center of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Charlotte Wallaeys
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Hilde De Rooster
- Small Animal Department, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Yannick Gansemans
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Filip Van Nieuwerburgh
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Bert Devriendt
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Eric Cox
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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12
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Lee K, Lee SH, Kim TH. The Biology of Prostaglandins and Their Role as a Target for Allergic Airway Disease Therapy. Int J Mol Sci 2020; 21:ijms21051851. [PMID: 32182661 PMCID: PMC7084947 DOI: 10.3390/ijms21051851] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/28/2020] [Accepted: 03/05/2020] [Indexed: 12/11/2022] Open
Abstract
Prostaglandins (PGs) are a family of lipid compounds that are derived from arachidonic acid via the cyclooxygenase pathway, and consist of PGD2, PGI2, PGE2, PGF2, and thromboxane B2. PGs signal through G-protein coupled receptors, and individual PGs affect allergic inflammation through different mechanisms according to the receptors with which they are associated. In this review article, we have focused on the metabolism of the cyclooxygenase pathway, and the distinct biological effect of each PG type on various cell types involved in allergic airway diseases, including asthma, allergic rhinitis, nasal polyposis, and aspirin-exacerbated respiratory disease.
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13
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14
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Hossain FMA, Choi JY, Uyangaa E, Park SO, Eo SK. The Interplay between Host Immunity and Respiratory Viral Infection in Asthma Exacerbation. Immune Netw 2019; 19:e31. [PMID: 31720042 PMCID: PMC6829071 DOI: 10.4110/in.2019.19.e31] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/22/2019] [Accepted: 08/25/2019] [Indexed: 12/16/2022] Open
Abstract
Asthma is one of the most common and chronic diseases characterized by multidimensional immune responses along with poor prognosis and severity. The heterogeneous nature of asthma may be attributed to a complex interplay between risk factors (either intrinsic or extrinsic) and specific pathogens such as respiratory viruses, and even bacteria. The intrinsic risk factors are highly correlated with asthma exacerbation in host, which may be mediated via genetic polymorphisms, enhanced airway epithelial lysis, apoptosis, and exaggerated viral replication in infected cells, resulting in reduced innate immune response and concomitant reduction of interferon (types I, II, and III) synthesis. The canonical features of allergic asthma include strong Th2-related inflammation, sensitivity to non-steroidal anti-inflammatory drugs (NSAIDs), eosinophilia, enhanced levels of Th2 cytokines, goblet cell hyperplasia, airway hyper-responsiveness, and airway remodeling. However, the NSAID-resistant non-Th2 asthma shows a characteristic neutrophilic influx, Th1/Th17 or even mixed (Th17-Th2) immune response and concurrent cytokine streams. Moreover, inhaled corticosteroid-resistant asthma may be associated with multifactorial innate and adaptive responses. In this review, we will discuss the findings of various in vivo and ex vivo models to establish the critical heterogenic asthmatic etiologies, host-pathogen relationships, humoral and cell-mediated immune responses, and subsequent mechanisms underlying asthma exacerbation triggered by respiratory viral infections.
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Affiliation(s)
- Ferdaus Mohd Altaf Hossain
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea.,Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Jin Young Choi
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Erdenebileg Uyangaa
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Seong Ok Park
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Seong Kug Eo
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
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15
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Rusznak M, Peebles RS. Prostaglandin E2 in NSAID-exacerbated respiratory disease: protection against cysteinyl leukotrienes and group 2 innate lymphoid cells. Curr Opin Allergy Clin Immunol 2019; 19:38-45. [PMID: 30516547 PMCID: PMC6296891 DOI: 10.1097/aci.0000000000000498] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to describe the recent advances that have been made in understanding the protective role of prostaglandin E2 (PGE2) in aspirin-exacerbated respiratory disease (AERD), known in Europe as NSAID-exacerbated respiratory disease (N-ERD). RECENT FINDINGS Decreased PGE2 signaling through the EP2 receptor in patients with AERD leads to an increase in leukotriene synthesis and signaling. Leukotriene signaling not only directly activates group 2 innate lymphoid cells and mast cells, but it also increases production of IL-33 and thymic stromal lymphopoietin. These cytokines drive Th2 inflammation in a suspected feed-forward mechanism in patients with AERD. SUMMARY Recent discoveries concerning the role of PGE2 in leukotriene synthesis and signaling in AERD, as well as downstream effects on group 2 innate lymphoid cells and mast cells, allow for a more comprehensive understanding of the pathogenesis of this disease. These discoveries also identify new paths of potential investigation and possible therapeutic targets for AERD.
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Affiliation(s)
- Mark Rusznak
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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16
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Bronchial epithelial cells of young and old mice directly regulate the differentiation of Th2 and Th17. Biosci Rep 2019; 39:BSR20181948. [PMID: 30541898 PMCID: PMC6356035 DOI: 10.1042/bsr20181948] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/02/2018] [Accepted: 12/10/2018] [Indexed: 12/18/2022] Open
Abstract
To determine whether or not house dust mite (HDM) and HDM+lipopolysaccharide (LPS) exposure causes a difference in T-cell subsets from young and old mice. The bronchial epithelial cells (BECs) from young and old mice were divided into three groups (PBS (control), HDM, and HDM+LPS). CD4+ naive T cells from the spleen and lymph nodes were collected after 24 h of co-culture with BECs. The number of Th2 and Th17 cells was elevated in the HDM and HDM+LPS groups compared with the control group; these responses were exacerbated when exposed to HDM+LPS. The number of HDM- and HDM+LPS-specific Th2/Th17 cells in young mice was higher than old mice; however, the Th2:Th17 cell ratio was greater in young mice, whereas the Th17:Th2 cell ratio was greater in old mice. The expression of GATA-3 and RORc was increased in the HDM+LPS and HDM groups compared with the PBS group and exhibited most in HDM+LPS group. The expression of HDM+LPS-specific GATA-3 in young mice was higher, while the expression of HDM+LPS-specific RORc in old mice was higher. Murine BECs directly regulated CD4+ naive T-cell differentiation under allergen exposure.
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17
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Li Z, Zhang Q, Wu Y, Hu F, Gu L, Chen T, Wang W. lncRNA Malat1 modulates the maturation process, cytokine secretion and apoptosis in airway epithelial cell-conditioned dendritic cells. Exp Ther Med 2018; 16:3951-3958. [PMID: 30344673 PMCID: PMC6176132 DOI: 10.3892/etm.2018.6687] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 08/24/2018] [Indexed: 12/22/2022] Open
Abstract
Airway epithelial cells (AECs) are the first point of contact with airborne antigens and are able to instruct resident immune cells to appropriate immune responses. Previous studies have shown that the abnormal expression of metastasis-associated lung adenocarcinoma transcript 1 (Malat1) was associated with tumorigenesis, progression, metastasis, and apoptosis in many cancer types. However, little is known about its functional involvement in the cross-talk of AECs with dendritic cells (DCs). The aim of the present study was to identify Malat1 as a novel epithelial cell-derived immune-modulating factor that contributes to the specific inflammatory-immune airway microenvironment. By using an in vitro co-culture model, where layers of AECs can interact with DCs, and transfecting Malat1 siRNA in AECs, AEC-conditioned DCs were harvested for further analysis of the celluar phenotype, secretion of inflammatory chemokines, and expression of apoptotic markers. The present study clearly demonstrated that Malat1 modulates the maturation process, pro-inflammatory cytokine secretion and apoptosis in AECs-conditioned DCs.
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Affiliation(s)
- Zhoubin Li
- Department of Lung Transplantation, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Qing Zhang
- Department of Cardiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Yutao Wu
- Department of Cardiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Feng Hu
- Department of Cardiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Linling Gu
- Department of Cardiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Ting Chen
- Department of Cardiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Weilin Wang
- Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
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18
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Abstract
Prostaglandins are synthesized through the metabolism of arachidonic acid via the cyclooxygenase pathway. There are five primary prostaglandins, PGD2, PGE2, PGF2, PGI2, and thromboxane B2, that all signal through distinct seven transmembrane, G-protein coupled receptors. The receptors through which the prostaglandins signal determines their immunologic or physiologic effects. For instance, the same prostaglandin may have opposing properties, dependent upon the signaling pathways activated. In this article, we will detail how inhibition of cyclooxygenase metabolism and regulation of prostaglandin signaling regulates allergic airway inflammation and asthma physiology. Possible prostaglandin therapeutic targets for allergic lung inflammation and asthma will also be reviewed, as informed by human studies, basic science, and animal models.
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Affiliation(s)
- R Stokes Peebles
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States.
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19
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Obregon C, Kumar R, Pascual MA, Vassalli G, Golshayan D. Update on Dendritic Cell-Induced Immunological and Clinical Tolerance. Front Immunol 2017; 8:1514. [PMID: 29250057 PMCID: PMC5715373 DOI: 10.3389/fimmu.2017.01514] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/26/2017] [Indexed: 12/18/2022] Open
Abstract
Dendritic cells (DCs) as highly efficient antigen-presenting cells are at the interface of innate and adaptive immunity. As such, they are key mediators of immunity and antigen-specific immune tolerance. Due to their functional specialization, research efforts have focused on the characterization of DCs subsets involved in the initiation of immunogenic responses and in the maintenance of tissue homeostasis. Tolerogenic DCs (tolDCs)-based therapies have been designed as promising strategies to prevent and control autoimmune diseases as well as allograft rejection after solid organ transplantation (SOT). Despite successful experimental studies and ongoing phase I/II clinical trials using autologous tolDCs in patients with type 1 diabetes, rheumatoid arthritis, multiple sclerosis, and in SOT recipients, additional basic research will be required to determine the optimal DC subset(s) and conditioning regimens for tolDCs-based treatments in vivo. In this review, we discuss the characteristics of human DCs and recent advances in their classification, as well as the role of DCs in immune regulation and their susceptibility to in vitro or in vivo manipulation for the development of tolerogenic therapies, with a focus on the potential of tolDCs for the treatment of autoimmune diseases and the prevention of allograft rejection after SOT.
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Affiliation(s)
- Carolina Obregon
- Department of Medicine, Transplantation Centre and Transplantation Immunopathology Laboratory, Service of Immunology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland
| | - Rajesh Kumar
- Department of Medicine, Transplantation Centre and Transplantation Immunopathology Laboratory, Service of Immunology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland
| | - Manuel Antonio Pascual
- Department of Medicine, Transplantation Centre and Transplantation Immunopathology Laboratory, Service of Immunology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland.,Department of Surgery, Transplantation Centre, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland
| | - Giuseppe Vassalli
- Département coeur-vaisseaux, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.,Fondazione Cardiocentro Ticino, Swiss Institute of Regenerative Medicine (SIRM), Lugano, Switzerland
| | - Déla Golshayan
- Department of Medicine, Transplantation Centre and Transplantation Immunopathology Laboratory, Service of Immunology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland.,Department of Surgery, Transplantation Centre, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland
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20
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Abstract
Bioactive lipids regulate most physiological processes, from digestion to blood flow and from hemostasis to labor. Lipid mediators are also involved in multiple pathologies including cancer, autoimmunity or asthma. The pathological roles of lipid mediators are based on their intricate involvement in the immune system, which comprises source and target cells of these mediators. Based on their biosynthetic origin, bioactive lipids can be grouped into different classes [e.g. sphingolipids, formed from sphingosine or eicosanoids, formed from arachidonic acid (AA)]. Owing to the complexity of different mediator classes and the prominent immunological roles of eicosanoids, this review will focus solely on the immune-regulation of eicosanoids. Eicosanoids do not only control key immune responses (e.g. chemotaxis, antigen presentation, phagocytosis), but they are also subject to reciprocal control by the immune system. Particularly, key immunoregulatory cytokines such as IL-4 and IFN-γ shape the cellular eicosanoid profile, thus providing efficient feedback regulation between cytokine and eicosanoid networks. For the purpose of this review, I will first provide a short overview of the most important immunological functions of eicosanoids with a focus on prostaglandins (PGs) and leukotrienes (LTs). Second, I will summarize the current knowledge on immunological factors that regulate eicosanoid production during infection and inflammation.
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21
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Gazdhar A, Blank F, Cesson V, Lovis A, Aubert JD, Lazor R, Spertini F, Wilson A, Hostettler K, Nicod LP, Obregon C. Human Bronchial Epithelial Cells Induce CD141/CD123/DC-SIGN/ FLT3 Monocytes That Promote Allogeneic Th17 Differentiation. Front Immunol 2017; 8:447. [PMID: 28487694 PMCID: PMC5403901 DOI: 10.3389/fimmu.2017.00447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/31/2017] [Indexed: 12/28/2022] Open
Abstract
Little is known about monocyte differentiation in the lung mucosal environment and about how the epithelium shapes monocyte function. We studied the role of the soluble component of bronchial epithelial cells (BECs) obtained under basal culture conditions in innate and adaptive monocyte responses. Monocytes cultured in bronchial epithelial cell-conditioned media (BEC-CM) specifically upregulate CD141, CD123, and DC-SIGN surface levels and FLT3 expression, as well as the release of IL-1β, IL-6, and IL-10. BEC-conditioned monocytes stimulate naive T cells to produce IL-17 through IL-1β mechanism and also trigger IL-10 production by memory T cells. Furthermore, monocytes cultured in an inflammatory environment induced by the cytokines IL-6, IL-8, IL-1β, IL-15, TNF-α, and GM-CSF also upregulate CD123 and DC-SIGN expression. However, only inflammatory cytokines in the epithelial environment boost the expression of CD141. Interestingly, we identified a CD141/CD123/DC-SIGN triple positive population in the bronchoalveolar lavage fluid (BALF) from patients with different inflammatory conditions, demonstrating that this monocyte population exists in vivo. The frequency of this monocyte population was significantly increased in patients with sarcoidosis, suggesting a role in inflammatory mechanisms. Overall, these data highlight the specific role that the epithelium plays in shaping monocyte responses. Therefore, the unraveling of these mechanisms contributes to the understanding of the function that the epithelium may play in vivo.
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Affiliation(s)
- Amiq Gazdhar
- Department of Pulmonary Medicine, University Hospital Bern, Bern, Switzerland.,Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Fabian Blank
- Department of Pulmonary Medicine, University Hospital Bern, Bern, Switzerland.,Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Valerie Cesson
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Alban Lovis
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - John David Aubert
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Romain Lazor
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Francois Spertini
- Immunology and Allergy Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Anne Wilson
- Department of Fundamental Oncology, University of Lausanne, Epalinges, Switzerland
| | - Katrin Hostettler
- Clinics of Respiratory Medicine, Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - Laurent P Nicod
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Carolina Obregon
- Pneumology Division, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
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22
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Gouveia-Figueira S, Karimpour M, Bosson JA, Blomberg A, Unosson J, Pourazar J, Sandström T, Behndig AF, Nording ML. Mass spectrometry profiling of oxylipins, endocannabinoids, and N-acylethanolamines in human lung lavage fluids reveals responsiveness of prostaglandin E2 and associated lipid metabolites to biodiesel exhaust exposure. Anal Bioanal Chem 2017; 409:2967-2980. [PMID: 28235994 PMCID: PMC5366178 DOI: 10.1007/s00216-017-0243-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/24/2017] [Accepted: 02/02/2017] [Indexed: 12/18/2022]
Abstract
The adverse effects of petrodiesel exhaust exposure on the cardiovascular and respiratory systems are well recognized. While biofuels such as rapeseed methyl ester (RME) biodiesel may have ecological advantages, the exhaust generated may cause adverse health effects. In the current study, we investigated the responses of bioactive lipid mediators in human airways after biodiesel exhaust exposure using lipidomic profiling methods. Lipid mediator levels in lung lavage were assessed following 1-h biodiesel exhaust (average particulate matter concentration, 159 μg/m3) or filtered air exposure in 15 healthy individuals in a double-blinded, randomized, controlled, crossover study design. Bronchoscopy was performed 6 h post exposure and lung lavage fluids, i.e., bronchial wash (BW) and bronchoalveolar lavage (BAL), were sequentially collected. Mass spectrometry methods were used to detect a wide array of oxylipins (including eicosanoids), endocannabinoids, N-acylethanolamines, and related lipid metabolites in the collected BW and BAL samples. Six lipids in the human lung lavage samples were altered following biodiesel exhaust exposure, three from BAL samples and three from BW samples. Of these, elevated levels of PGE2, 12,13-DiHOME, and 13-HODE, all of which were found in BAL samples, reached Bonferroni-corrected significance. This is the first study in humans reporting responses of bioactive lipids following biodiesel exhaust exposure and the most pronounced responses were seen in the more peripheral and alveolar lung compartments, reflected by BAL collection. Since the responsiveness and diagnostic value of a subset of the studied lipid metabolites were established in lavage fluids, we conclude that our mass spectrometry profiling method is useful to assess effects of human exposure to vehicle exhaust.
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Affiliation(s)
| | | | - Jenny A Bosson
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Anders Blomberg
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Jon Unosson
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Jamshid Pourazar
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Thomas Sandström
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Annelie F Behndig
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Malin L Nording
- Department of Chemistry, Umeå University, 90187, Umeå, Sweden.
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Ng Kuet Leong N, Brombacher F, Dalpke AH, Weitnauer M. Crosstalk between glucocorticoids and IL-4 modulates Ym1 expression in alternatively activated myeloid cells. Immunobiology 2017; 222:759-767. [PMID: 28209270 DOI: 10.1016/j.imbio.2017.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/07/2017] [Accepted: 02/07/2017] [Indexed: 12/31/2022]
Abstract
Airway epithelial cells induce a tolerogenic microenvironment by modulating immune cells in the lung. We recently showed that the supernatant of airway epithelial cells induces two marker genes of alternative activation, Ym1 and Ms4a8a, in respiratory myeloid cells. This induction was partially mediated by glucocorticoids, secreted by airway epithelial cells. In this study, we further investigated Ym1 and Ms4a8a regulation in alternatively activated myeloid cells in the presence of the TH2 cytokines IL-4 and IL-13. We show that Ym1 expression is boosted upon co-stimulation with airway epithelial cell supernatant and IL-4/IL-13, whereas Ms4a8a expression is down-regulated. This suggests that a crosstalk between IL-4/IL-13 and glucocorticoid signaling exists. Blocking protein synthesis indicated that dexamethasone-induced de novo protein synthesis is required for the interaction between glucocorticoid and IL-4 signaling regarding Ym1 regulation. Using reporter gene constructs, we demonstrate that the important regulatory region within the Ym1 promoter is found between -602bp and -969bp upstream of the start of translation. Bioinformatic analysis identified several glucocorticoid response elements (GREs) in this region. Further analysis identified overlapping but functionally active glucocorticoid receptor and STAT-6 binding sites, supporting the cooperative effect of glucocorticoids and IL-4 in the regulation of Ym1. These findings further prove the plasticity and complexity of alternatively activated myeloid cells and the importance of the local microenvironment. We believe that this regulation is of special importance in the pulmonary system, since both factors, glucocorticoids and IL-4/13, play a role in airway diseases such as asthma.
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Affiliation(s)
- Nathalie Ng Kuet Leong
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Frank Brombacher
- International Centre for Genetic Engineering and Biotechnology (ICGEB) & Institute of Infectious Disease and Molecular Medicine (IDM), Division of Immunology, University of Cape Town & South African Medical Research Council (SAMRC), South Africa
| | - Alexander H Dalpke
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany; Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL).
| | - Michael Weitnauer
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany
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24
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Prakash YS. Emerging concepts in smooth muscle contributions to airway structure and function: implications for health and disease. Am J Physiol Lung Cell Mol Physiol 2016; 311:L1113-L1140. [PMID: 27742732 DOI: 10.1152/ajplung.00370.2016] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 10/06/2016] [Indexed: 12/15/2022] Open
Abstract
Airway structure and function are key aspects of normal lung development, growth, and aging, as well as of lung responses to the environment and the pathophysiology of important diseases such as asthma, chronic obstructive pulmonary disease, and fibrosis. In this regard, the contributions of airway smooth muscle (ASM) are both functional, in the context of airway contractility and relaxation, as well as synthetic, involving production and modulation of extracellular components, modulation of the local immune environment, cellular contribution to airway structure, and, finally, interactions with other airway cell types such as epithelium, fibroblasts, and nerves. These ASM contributions are now found to be critical in airway hyperresponsiveness and remodeling that occur in lung diseases. This review emphasizes established and recent discoveries that underline the central role of ASM and sets the stage for future research toward understanding how ASM plays a central role by being both upstream and downstream in the many interactive processes that determine airway structure and function in health and disease.
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Affiliation(s)
- Y S Prakash
- Departments of Anesthesiology, and Physiology & Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
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25
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Lipid mediators as regulators of human ILC2 function in allergic diseases. Immunol Lett 2016; 179:36-42. [PMID: 27396531 DOI: 10.1016/j.imlet.2016.07.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/06/2016] [Accepted: 07/06/2016] [Indexed: 12/29/2022]
Abstract
Group 2 innate lymphoid cells (ILC2) are specialized in type 2 immunity. ILC2 are activated early in immune responses and, despite their low abundance, are able to initiate and amplify allergic inflammation by orchestrating other type 2 immune cells. Based on recent discoveries, the spectrum of ILC2 regulating factors has been extended. It is now well established that not only epithelial cell-derived innate cytokines, but also bioactive lipids can regulate ILC2 activity and accumulation. Additionally, ILC2 appear to be susceptible to changes in the cytokine milieu and can acquire an ILC1-like phenotype due to a high degree of cellular plasticity. As ILC2 are fundamentally involved in the pathogenesis of type 2 diseases, they represent a promising therapeutic target for allergic airway and skin diseases. In this review we summarize the current knowledge about ILC2 biology in the allergy context, with a particular focus on the emerging role of lipid mediators in regulating ILC2 function.
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26
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Papazian D, Hansen S, Würtzen PA. Airway responses towards allergens - from the airway epithelium to T cells. Clin Exp Allergy 2016; 45:1268-87. [PMID: 25394747 DOI: 10.1111/cea.12451] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The prevalence of allergic diseases such as allergic rhinitis is increasing, affecting up to 30% of the human population worldwide. Allergic sensitization arises from complex interactions between environmental exposures and genetic susceptibility, resulting in inflammatory T helper 2 (Th2) cell-derived immune responses towards environmental allergens. Emerging evidence now suggests that an epithelial dysfunction, coupled with inherent properties of environmental allergens, can be responsible for the inflammatory responses towards allergens. Several epithelial-derived cytokines, such as thymic stromal lymphopoietin (TSLP), IL-25 and IL-33, influence tissue-resident dendritic cells (DCs) as well as Th2 effector cells. Exposure to environmental allergens does not elicit Th2 inflammatory responses or any clinical symptoms in nonatopic individuals, and recent findings suggest that a nondamaged, healthy epithelium lowers the DCs' ability to induce inflammatory T-cell responses towards allergens. The purpose of this review was to summarize the current knowledge on which signals from the airway epithelium, from first contact with inhaled allergens all the way to the ensuing Th2-cell responses, influence the pathology of allergic diseases.
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Affiliation(s)
- D Papazian
- Department of Cancer & Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark.,ALK, Hørsholm, Denmark
| | - S Hansen
- Department of Cancer & Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
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27
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Weitnauer M, Mijošek V, Dalpke AH. Control of local immunity by airway epithelial cells. Mucosal Immunol 2016; 9:287-98. [PMID: 26627458 DOI: 10.1038/mi.2015.126] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/25/2015] [Indexed: 02/04/2023]
Abstract
The lung is ventilated by thousand liters of air per day. Inevitably, the respiratory system comes into contact with airborne microbial compounds, most of them harmless contaminants. Airway epithelial cells are known to have innate sensor functions, thus being able to detect microbial danger. To avoid chronic inflammation, the pulmonary system has developed specific means to control local immune responses. Even though airway epithelial cells can act as proinflammatory promoters, we propose that under homeostatic conditions airway epithelial cells are important modulators of immune responses in the lung. In this review, we discuss epithelial cell regulatory functions that control reactivity of professional immune cells within the microenvironment of the airways and how these mechanisms are altered in pulmonary diseases. Regulation by epithelial cells can be divided into two mechanisms: (1) mediators regulate epithelial cells' innate sensitivity in cis and (2) factors are produced that limit reactivity of immune cells in trans.
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Affiliation(s)
- M Weitnauer
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, Heidelberg, Germany
| | - V Mijošek
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, Heidelberg, Germany
| | - A H Dalpke
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, Heidelberg, Germany.,Translational Lung Research Center (TLRC), Member of the German Center for Lung Research (DZL), Heidelberg, Germany
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28
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Cell-contact dependent inhibition of monocytes by airway epithelial cells and reversion by infection with Respiratory Syncytial Virus. Immunobiology 2015; 220:1240-5. [PMID: 26153873 DOI: 10.1016/j.imbio.2015.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 06/17/2015] [Accepted: 06/22/2015] [Indexed: 01/01/2023]
Abstract
Airway epithelial cells (AEC) are the first line of defense against airborne infectious microbes and play an important role in regulating the local immune response. However, the interplay of epithelial cells and professional immune cells during both homeostasis and infection has only been partially studied. The present study was performed to determine how bronchial epithelial cells affect the activation of monocytes. Under healthy conditions, AECs were shown to inhibit reactivity of monocytes. We hypothesized that upon infection, monocytes might be released from inhibition by AECs. We report that direct contact of monocytes with unstimulated BEAS2B epithelial cells results in inhibition of TNF secretion by activated monocytes. In addition to the known soluble modulators, we show that cell contacts between epithelial cells and monocytes or macrophages also contribute to homeostatic inhibitory actions. We find AECs to express the inhibitory molecule PD-L1 and blockade of PD-L1 results in increased secretion of pro-inflammatory cytokines from monocytes. Contrary to the inhibitory activities during homeostasis, epithelial cells infected with Respiratory Syncitial Virus (RSV) induce a significant release of inhibition. However, release of inhibition was not due to modulation of PD-L1 expression in AECs. We conclude that airway epithelial cells control the reactivity of monocytes through direct and indirect interactions; however tonic inhibition can be reverted upon stimulation of AECs with RSV and thereof derived molecular patterns. The study confirms the important role of airway epithelial cells for local immune reactions.
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29
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Loxham M, Davies DE, Blume C. Epithelial function and dysfunction in asthma. Clin Exp Allergy 2015; 44:1299-313. [PMID: 24661647 DOI: 10.1111/cea.12309] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Revised: 03/06/2014] [Accepted: 03/19/2014] [Indexed: 12/15/2022]
Abstract
Asthma was previously defined as an allergic Th2-mediated inflammatory immune disorder. Recently, this paradigm has been challenged because not all pathological changes observed in the asthmatic airways are adequately explained simply as a result of Th2-mediated processes. Contemporary thought holds that asthma is a complex immune disorder involving innate as well as adaptive immune responses, with the clinical heterogeneity of asthma perhaps a result of the different relative contribution of these two systems to the disease. Epidemiological studies show that exposure to certain environmental substances is strongly associated with the risk of developing asthma. The airway epithelium is first barrier to interact with, and respond to, environmental agents (pollution, viral infection, allergens), suggesting that it is a key player in the pathology of asthma. Epithelial cells play a key role in the regulation of tissue homeostasis by the modulation of numerous molecules, from antioxidants and lipid mediators to growth factors, cytokines, and chemokines. Additionally, the epithelium is also able to suppress mechanisms involved in, for example, inflammation in order to maintain homeostasis. An intrinsic alteration or defect in these regulation mechanisms compromises the epithelial barrier, and therefore, the barrier may be more prone to environmental substances and thus more likely to exhibit an asthmatic phenotype. In support of this, polymorphisms in a number of genes that are expressed in the bronchial epithelium have been linked to asthma susceptibility, while environmental factors may affect epigenetic mechanisms that can alter epithelial function and response to environmental insults. A detailed understanding of the regulatory role of the airway epithelium is required to develop new therapeutic strategies for asthma that not only address the symptoms but also the underlining pathogenic mechanism(s) and prevent airway remodelling.
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Affiliation(s)
- M Loxham
- Academic Unit of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, University Hospital Southampton, Southampton, Hampshire, UK
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30
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Hammad H. Epithelial Cell Regulation of Immune Responses in the Lung. Mucosal Immunol 2015. [DOI: 10.1016/b978-0-12-415847-4.00029-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Gamil AAA, Guo TC, König M, Evensen Ø. Distribution of EP4 receptor in different Atlantic salmon (Salmo salar L.) tissues. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2015; 48:143-150. [PMID: 25307202 DOI: 10.1016/j.dci.2014.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/30/2014] [Accepted: 09/30/2014] [Indexed: 06/04/2023]
Abstract
Prostaglandin E2 (PGE2) is an important lipid mediator that plays diverse functions in mammals. Four receptor subtypes of PGE2, designated EP1-4, have been identified to mediate its signaling pathways. Extensive studies of PGE2 and its receptors have been carried out in mammals, but little is known in fish, including Atlantic salmon. In the current study, the distribution of Atlantic salmon EP4 receptor in different tissues was investigated using RT- and real-time PCR. A custom made antibody was used to investigate the distribution of this receptor in different tissues. Quantitative analysis by real-time PCR revealed that the expression was more abundant in the spleen followed by head kidney, skin and fin while it was least expressed in heart, muscles and brain. The staining intensity obtained by immunohistochemistry correlated with the RT-PCR results. EP4 expression was strongly associated with the immune cells in different tissues. To our knowledge, this is the first study to describe the distribution of EP4 receptor in Atlantic salmon tissues. Our findings suggest that EP4 may play a role in mediating immune responses as observed in mammals.
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Affiliation(s)
- A A A Gamil
- Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., 0033 Oslo, Norway
| | - T-C Guo
- Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., 0033 Oslo, Norway
| | - M König
- Synaptic Vesicle Dynamics, European Neuroscience Institute, 37077 Göttingen, Germany
| | - Ø Evensen
- Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., 0033 Oslo, Norway.
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32
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Claar D, Hartert TV, Peebles RS. The role of prostaglandins in allergic lung inflammation and asthma. Expert Rev Respir Med 2014; 9:55-72. [PMID: 25541289 DOI: 10.1586/17476348.2015.992783] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Prostaglandins (PGs) are products of the COX pathway of arachidonic acid metabolism. There are five primary PGs, PGD₂, PGE₂, PGF₂, PGI₂ and thromboxane A₂, all of which signal through distinct seven transmembrane, G-protein coupled receptors. Some PGs may counteract the actions of others, or even the same PG may have opposing physiologic or immunologic effects, depending on the specific receptor through which it signals. In this review, we examine the effects of COX activity and the various PGs on allergic airway inflammation and physiology that is associated with asthma. We also highlight the potential therapeutic benefit of targeting PGs in allergic lung inflammation and asthma based on basic science, animal model and human studies.
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Affiliation(s)
- Dru Claar
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, T-1217 MCN Vanderbilt University Medical Center, Vanderbilt University School of Medicine, Nashville, TN 37232-2650, USA
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33
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Weitnauer M, Schmidt L, Ng Kuet Leong N, Muenchau S, Lasitschka F, Eckstein V, Hübner S, Tuckermann J, Dalpke AH. Bronchial epithelial cells induce alternatively activated dendritic cells dependent on glucocorticoid receptor signaling. THE JOURNAL OF IMMUNOLOGY 2014; 193:1475-84. [PMID: 24965772 DOI: 10.4049/jimmunol.1400446] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Airway epithelial cells mount a tolerogenic microenvironment that reduces the proinflammatory potential of respiratory dendritic cells (DCs). We recently demonstrated that tracheal epithelial cells continuously secrete soluble mediators that affect the reactivity of local innate immune cells. Using transcriptional profiling, we now observed that conditioning of DCs by tracheal epithelial cells regulated 98 genes under homeostatic conditions. Among the most upregulated genes were Ms4a8a and Ym1, marker genes of alternatively activated myeloid cells. Ex vivo analysis of respiratory DCs from nonchallenged mice confirmed a phenotype of alternative activation. Bioinformatic analysis showed an overrepresentation of hormone-nuclear receptors within the regulated genes, among which was the glucocorticoid receptor. In line with a role for glucocorticoids, pharmacological blockade as well as genetic manipulation of the glucocorticoid receptor within DCs inhibited Ms4a8a and Ym1 expression as well as MHC class II and CD86 regulation upon epithelial cell conditioning. Within epithelial cell-conditioned medium, low amounts of glucocorticoids were present. Further analysis showed that airway epithelial cells did not produce glucocorticoids de novo, yet were able to reactivate inactive dehydrocorticosterone enzymatically. The results show that airway epithelial cells regulate local immune responses, and this modulation involves local production of glucocorticoids and induction of an alternative activation phenotype in DCs.
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Affiliation(s)
- Michael Weitnauer
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Lotte Schmidt
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany; Institute of Pathology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Nathalie Ng Kuet Leong
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Stephanie Muenchau
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Felix Lasitschka
- Institute of Pathology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Volker Eckstein
- Department of Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany; and
| | - Sabine Hübner
- Institute of General Zoology and Endocrinology, University of Ulm, 89081 Ulm, Germany
| | - Jan Tuckermann
- Institute of General Zoology and Endocrinology, University of Ulm, 89081 Ulm, Germany
| | - Alexander H Dalpke
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, 69120 Heidelberg, Germany;
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34
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Coulombe F, Jaworska J, Verway M, Tzelepis F, Massoud A, Gillard J, Wong G, Kobinger G, Xing Z, Couture C, Joubert P, Fritz JH, Powell WS, Divangahi M. Targeted prostaglandin E2 inhibition enhances antiviral immunity through induction of type I interferon and apoptosis in macrophages. Immunity 2014; 40:554-68. [PMID: 24726877 DOI: 10.1016/j.immuni.2014.02.013] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 02/25/2014] [Indexed: 12/24/2022]
Abstract
Aspirin gained tremendous popularity during the 1918 Spanish Influenza virus pandemic, 50 years prior to the demonstration of their inhibitory action on prostaglandins. Here, we show that during influenza A virus (IAV) infection, prostaglandin E2 (PGE2) was upregulated, which led to the inhibition of type I interferon (IFN) production and apoptosis in macrophages, thereby causing an increase in virus replication. This inhibitory role of PGE2 was not limited to innate immunity, because both antigen presentation and T cell mediated immunity were also suppressed. Targeted PGE2 suppression via genetic ablation of microsomal prostaglandin E-synthase 1 (mPGES-1) or by the pharmacological inhibition of PGE2 receptors EP2 and EP4 substantially improved survival against lethal IAV infection whereas PGE2 administration reversed this phenotype. These data demonstrate that the mPGES-1-PGE2 pathway is targeted by IAV to evade host type I IFN-dependent antiviral immunity. We propose that specific inhibition of PGE2 signaling might serve as a treatment for IAV.
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Affiliation(s)
- François Coulombe
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Joanna Jaworska
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Mark Verway
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Fanny Tzelepis
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Amir Massoud
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Joshua Gillard
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Gary Wong
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB R3E 3R2, Canada
| | - Gary Kobinger
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB R3E 3R2, Canada
| | - Zhou Xing
- McMaster Immunology Research Centre and Department of Pathology and Molecular Medicine, McMaster University, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada
| | - Christian Couture
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Hôtel-Dieu de Québec, 11 côte du Palais, Quebec, Quebec G1R 2J6, Canada
| | - Philippe Joubert
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Hôtel-Dieu de Québec, 11 côte du Palais, Quebec, Quebec G1R 2J6, Canada
| | - Jörg H Fritz
- Department of Microbiology & Immunology, McGill Life Sciences Complex, Complex Traits Group, Bellini Pavilion, 3649 Promenade Sir William Osler, Montreal, Quebec H3G 0B1, Canada
| | - William S Powell
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada
| | - Maziar Divangahi
- Department of Medicine, Department of Microbiology & Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre and Research Institute, Meakins-Christie Laboratories, 3626 St. Urbain Street, Montreal, Quebec H2X 2P2, Canada.
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35
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Zhang Y, Cai W, Huang Q, Gu Y, Shi Y, Huang J, Zhao F, Liu Q, Wei X, Jin M, Wu C, Xie Q, Zhang Y, Wan B, Zhang Y. Mesenchymal stem cells alleviate bacteria-induced liver injury in mice by inducing regulatory dendritic cells. Hepatology 2014; 59:671-82. [PMID: 23929707 PMCID: PMC4298763 DOI: 10.1002/hep.26670] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 07/30/2013] [Indexed: 12/13/2022]
Abstract
UNLABELLED Fulminant hepatic failure (FHF) is a clinical syndrome characterized by sudden and severe impairment of liver function. Mesenchymal stem cells (MSCs) have been proposed as a promising therapeutic approach for FHF. In this study we used Propionibacterium acnes (P. acnes)-primed, lipopolysaccharide (LPS)-induced liver injury in mice as an animal model of human FHF. We demonstrated that administration of MSCs significantly ameliorated liver injury and improved the survival rates of mice subjected to P. acnes plus LPS-induced FHF. Allogeneic MSCs showed similar treatment efficacy as autologous MSCs did in FHF. Treatment efficacy of MSCs could be attributed to decreased infiltration and activation of CD4(+) T cells in the liver, inhibition of T helper 1 cells, and induction of regulatory T cells (Tregs). Moreover, decreased DNA copies of P. acnes were detected in the liver of MSC-treated mice. Intriguingly, a distinct liver population of CD11c(+) MHCII(hi) CD80(lo) CD86(lo) regulatory dendritic cells (DCs) was induced by MSCs. Moreover, these DCs induced Treg differentiation through transforming growth factor-β production. Further mechanistic studies demonstrated that MSC-derived prostaglandin E2 and one of its receptors, EP4, played essential roles in the differentiation of CD11c(+) B220(-) DC precursors into regulatory DCs in a phosphoinositide 3-kinase-dependent manner. CONCLUSION MSCs induce regulatory DCs from CD11c(+) B220(-) DC precursors. This study elucidates an immunoregulatory mechanism of MSCs and lays a foundation for application of MSCs in FHF therapy.
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Affiliation(s)
- Yi Zhang
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) and Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & SJTUSMShanghai, China
| | - Wei Cai
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) and Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & SJTUSMShanghai, China,Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Qingrong Huang
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Yuting Gu
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) and Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & SJTUSMShanghai, China
| | - Yufang Shi
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Jiefang Huang
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Fang Zhao
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Qiang Liu
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Xunbin Wei
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghai, China
| | - Min Jin
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Changping Wu
- Department of Oncology, Third Affiliated Hospital, Soochow UniversityChangzhou, Jiangsu Province, China
| | - Qing Xie
- Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Yi Zhang
- Department of Internal Medicine, University of MichiganAnn Arbor, MI, USA
| | - Bing Wan
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) and Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & SJTUSMShanghai, China
| | - Yanyun Zhang
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) and Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & SJTUSMShanghai, China
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36
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Eicosanoid biosynthesis during mucociliary and mucous metaplastic differentiation of bronchial epithelial cells. Prostaglandins Other Lipid Mediat 2013; 106:116-23. [PMID: 23742951 DOI: 10.1016/j.prostaglandins.2013.05.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 04/15/2013] [Accepted: 05/06/2013] [Indexed: 01/11/2023]
Abstract
The purpose of this study was to examine the profile of eicosanoids secreted by human bronchial epithelial cells (HBEC) during their in vitro differentiation toward mucociliary or mucous metaplastic phenotype. Eicosanoids were measured in supernatants by mass spectrometry, and corresponding gene expression by real-time PCR. Primary HBEC produced mainly prostaglandins (PGE2, PGD2) and epoxides (e.g. 14,15-EET), but during further mucociliary differentiation we observed a gradual increase in secretion of lipoxygenase derived HETEs. Treatment with IL-13 and IL-4 induced mucous metaplasia and resulted in downregulation of PG pathway, and potent induction of 15-lipoxygenase (marked release of 15-HETE). The deficiency in PG production sustained during long term culture of mucous metaplastic epithelia. In conclusions, Th2-type cytokines induce changes in eicosanoid metabolism of airway epithelial cells, resulting in an immense induction of 15-lipoxygenase pathway, and inhibition of PG pathways. Deficient production of immunomodulatory PGs may promote chronic inflammation and airway remodeling.
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Reciprocal crosstalk between dendritic cells and natural killer cells under the effects of PGE2 in immunity and immunopathology. Cell Mol Immunol 2013; 10:213-21. [PMID: 23524652 DOI: 10.1038/cmi.2013.1] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The reciprocal activating crosstalk between dendritic cells (DCs) and natural killer (NK) cells plays a pivotal role in regulating immune defense against viruses and tumors. The cytokine-producing capacity, Th-cell polarizing ability and chemokine expression, migration and stimulatory functions of DCs are regulated by activated NK cells. Conversely, the innate and effector functions of NK cells require close interactions with activated DCs. Cell membrane-associated molecules and soluble mediators, including cytokines and prostaglandins (PGs), contribute to the bidirectional crosstalk between DCs and NK cells. One of the most well-known and well-studied PGs is PGE2. Produced by many cell types, PGE2 has been shown to affect various aspects of the immune and inflammatory responses by acting on all components of the immune system. There is emerging evidence that PGE2 plays crucial roles in DC and NK cell biology. Several studies have shown that DCs are not only a source of PGE2, but also a target of its immunomodulatory action in normal immune response and during immune disorders. Although NK cells appear to be unable to produce PGE2, they are described as powerful PGE2-responding cells, as they express all PGE2 E-prostanoid (EP) receptors. Several NK cell functions (lysis, migration, proliferation, cytokine production) are influenced by PGE2. This review highlights the effects of PGE2 on DC-NK cell crosstalk and its subsequent impact on immune regulations in normal and immunopathological processes.
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Shimabukuro-Vornhagen A, Liebig TM, Koslowsky T, Theurich S, von Bergwelt-Baildon MS. The ratio between dendritic cells and T cells determines whether prostaglandin E2 has a stimulatory or inhibitory effect. Cell Immunol 2013; 281:62-7. [PMID: 23454682 DOI: 10.1016/j.cellimm.2013.01.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 12/12/2012] [Accepted: 01/16/2013] [Indexed: 01/06/2023]
Abstract
Prostaglandin E2 has been shown to enhance the maturation, migration, and antigen-presenting capacity of DCs. It is therefore included in many maturation cocktails for the generation of monocyte-derived DCs. Paradoxically, PGE2 is also an important tumor-derived immunosuppressive factor and has inhibitory effects on DC differentiation and function. To further investigate these seemingly contradictory results we studied whether the DC:T cell ratio has an impact on the outcome of the interaction between PGE2-treated DCs and T cells. Surprisingly, at high DC:T cell ratios T cell proliferation was inhibited while at low ratios PGE2-treated DCs displayed enhanced T cell-stimulatory properties. The inhibitory function of PGE2-treated DCs depended primarily on the PGE2-induced induction of indoleamine 2,3-dioxygenase competence. In summary, we show that PGE2-treated DCs can have either an immunogenic or tolerogenic function depending on the DC:T cell ratio. This finding could explain the conflicting results regarding the influence of PGE2 on DC function.
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Narita Y, Kitamura H, Wakita D, Sumida K, Masuko K, Terada S, Nakano K, Nishimura T. The key role of IL-6-arginase cascade for inducing dendritic cell-dependent CD4(+) T cell dysfunction in tumor-bearing mice. THE JOURNAL OF IMMUNOLOGY 2012; 190:812-20. [PMID: 23248265 DOI: 10.4049/jimmunol.1103797] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Evaluation of immune dysfunction during the tumor-bearing state is a critical issue in combating cancer. In this study, we initially found that IL-6, one of the cachectic factors, suppressed CD4(+) T cell-mediated immunity through downregulation of MHC class II by enhanced arginase activity of dendritic cells (DC) in tumor-bearing mice. We demonstrated that administration of Ab against IL-6R (anti-IL-6R mAb) greatly enhanced T cell responses and inhibited the growth of tumor in vivo. We also found that IL-6 upregulated the expression of arginase-1 and arginase activity of DC in vitro. Tumor-infiltrating CD11c(+) DC exhibited upregulated mRNA expression of arginase-1 but reduced expression of MHC class II in parallel with the increase in serum IL-6 levels at the late stage in tumor-bearing hosts. However, the administration of anti-IL-6R mAb into tumor-bearing mice inhibited both the downmodulation of MHC class II and the upregulation of arginase-1 mRNA levels in DC. Furthermore, we noted that N(ω)-hydroxy-L-arginine or L-arginine, an arginase-1 inhibitor, blocked the reduction in MHC class II levels on CD11c(+) DC during the tumor-bearing state. Finally, we demonstrated that the administration of N(ω)-hydroxy-L-arginine at the peritumor site significantly enhanced CD4(+) T cell responses and inhibited tumor growth. Thus, IL-6-mediated arginase activation and the subsequent reduction in MHC class II expression on DC appeared to be critical mechanisms for inducing dysfunction of the immune system in the tumor-bearing state. Blockade of the IL-6-arginase cascade is a promising tool to overcome the dysfunction of antitumor immunity in tumor-bearing hosts.
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Affiliation(s)
- Yoshinori Narita
- Division of Immunoregulation, Section of Disease Control, Institute for Genetic Medicine, Hokkaido University, Sapporo 060-0815, Japan
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McCarthy MK, Weinberg JB. Eicosanoids and respiratory viral infection: coordinators of inflammation and potential therapeutic targets. Mediators Inflamm 2012; 2012:236345. [PMID: 22665949 PMCID: PMC3362132 DOI: 10.1155/2012/236345] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Accepted: 03/12/2012] [Indexed: 12/20/2022] Open
Abstract
Viruses are frequent causes of respiratory infection, and viral respiratory infections are significant causes of hospitalization, morbidity, and sometimes mortality in a variety of patient populations. Lung inflammation induced by infection with common respiratory pathogens such as influenza and respiratory syncytial virus is accompanied by increased lung production of prostaglandins and leukotrienes, lipid mediators with a wide range of effects on host immune function. Deficiency or pharmacologic inhibition of prostaglandin and leukotriene production often results in a dampened inflammatory response to acute infection with a respiratory virus. These mediators may, therefore, serve as appealing therapeutic targets for disease caused by respiratory viral infection.
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Affiliation(s)
- Mary K. McCarthy
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jason B. Weinberg
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109, USA
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Abstract
Asthma is a T lymphocyte-controlled disease of the airway wall caused by inflammation, overproduction of mucus and airway wall remodeling leading to bronchial hyperreactivity and airway obstruction. The airway epithelium is considered an essential controller of inflammatory, immune and regenerative responses to allergens, viruses and environmental pollutants that contribute to asthma pathogenesis. Epithelial cells express pattern recognition receptors that detect environmental stimuli and secrete endogenous danger signals, thereby activating dendritic cells and bridging innate and adaptive immunity. Improved understanding of the epithelium's function in maintaining the integrity of the airways and its dysfunction in asthma has provided important mechanistic insight into how asthma is initiated and perpetuated and could provide a framework by which to select new therapeutic strategies that prevent exacerbations and alter the natural course of the disease.
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Hwang TL, Tang MC, Kuo LM, Chang WD, Chung PJ, Chang YW, Fang YC. YC-1 potentiates cAMP-induced CREB activation and nitric oxide production in alveolar macrophages. Toxicol Appl Pharmacol 2012; 260:193-200. [DOI: 10.1016/j.taap.2012.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 02/07/2012] [Accepted: 02/14/2012] [Indexed: 01/20/2023]
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Role of PGE2 in asthma and nonasthmatic eosinophilic bronchitis. Mediators Inflamm 2012; 2012:645383. [PMID: 22529528 PMCID: PMC3316983 DOI: 10.1155/2012/645383] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 01/09/2012] [Accepted: 01/09/2012] [Indexed: 11/17/2022] Open
Abstract
Eosinophilic bronchitis is a common cause of chronic cough, which like asthma is characterized by sputum eosinophilia, but unlike asthma there is no variable airflow obstruction or airway hyperresponsiveness. Several studies suggest that prostaglandins may play an important role in orchestrating interactions between different cells in several inflammatory diseases such as asthma. PGE2 is important because of the multiplicity of its effects on immune response in respiratory diseases; however, respiratory system appears to be unique in that PGE2 has beneficial effects. We described that the difference in airway function observed in patients with eosinophilic bronchitis and asthma could be due to differences in PGE2 production. PGE2 present in induced sputum supernatant from NAEB patients decreases BSMC proliferation, probably due to simultaneous stimulation of EP2 and EP4 receptors with inhibitory activity. This protective effect of PGE2 may not only be the result of a direct action exerted on airway smooth-muscle proliferation but may also be attributable to the other anti-inflammatory actions.
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Corrigan CJ, Napoli RL, Meng Q, Fang C, Wu H, Tochiki K, Reay V, Lee TH, Ying S. Reduced expression of the prostaglandin E2 receptor E-prostanoid 2 on bronchial mucosal leukocytes in patients with aspirin-sensitive asthma. J Allergy Clin Immunol 2012; 129:1636-46. [PMID: 22418066 DOI: 10.1016/j.jaci.2012.02.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 01/17/2012] [Accepted: 02/09/2012] [Indexed: 11/24/2022]
Abstract
BACKGROUND Prostaglandin E(2) (PGE(2)) is thought to play a role in the pathogenesis of aspirin-sensitive asthma (ASA). OBJECTIVE We sought to extend our previous observations implicating impaired inflammatory cell responsiveness to PGE(2) as a pathogenetic mechanism in patients with aspirin-sensitive rhinosinusitis to the bronchial mucosa in patients with ASA. METHODS Immunohistochemistry was used to enumerate inflammatory cells and their expression of cysteinyl leukotriene receptors 1 and 2 (CysLT(1) and CysLT(2)) and the PGE(2) receptors E-prostanoid 1 to 4 (EP(1)-EP(4)) in bronchial biopsy specimens from patients with ASA, patients with aspirin-tolerant asthma, and control subjects (n= 15 in each group). Concentrations of PGE(2) in bronchoalveolar lavage fluid were measured by using ELISA. The effects of PGE(2) and EP receptor agonists on CD3/CD28-stimulated cytokine production by PBMCs were measured by using ELISA. Airways responsiveness to LTD(4)in vivo was measured in asthmatic patients by means of bronchial challenge. RESULTS Compared with patients with aspirin-tolerant asthma, patients with ASA had increased bronchial mucosal neutrophil and eosinophil numbers but reduced percentages of T cells, macrophages, mast cells, and neutrophils expressing EP(2). Both groups showed increased bronchial sensitivity to inhaled LTD(4), but this did not correlate with mucosal expression of CysLT(1) or CysLT(2). Bronchoalveolar lavage fluid PGE(2) concentrations were comparable in all groups. In vitro PGE(2) inhibited cytokine production by PBMCs through EP(2) but not other PGE(2) receptors. CONCLUSION Our data are consistent with the hypothesis that impaired inhibition of inflammatory leukocytes by PGE(2) acting through the EP(2) receptor has a role in the pathogenesis of ASA.
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Affiliation(s)
- Chris J Corrigan
- Division of Asthma, Allergy & Lung Biology, King's College London, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
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Church RJ, Jania LA, Koller BH. Prostaglandin E(2) produced by the lung augments the effector phase of allergic inflammation. THE JOURNAL OF IMMUNOLOGY 2012; 188:4093-102. [PMID: 22412193 DOI: 10.4049/jimmunol.1101873] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Elevated PGE(2) is a hallmark of most inflammatory lesions. This lipid mediator can induce the cardinal signs of inflammation, and the beneficial actions of nonsteroidal anti-inflammatory drugs are attributed to inhibition of cyclooxygenase (COX)-1 and COX-2, enzymes essential in the biosynthesis of PGE(2) from arachidonic acid. However, both clinical studies and rodent models suggest that, in the asthmatic lung, PGE(2) acts to restrain the immune response and limit physiological change secondary to inflammation. To directly address the role of PGE(2) in the lung, we examined the development of disease in mice lacking microsomal PGE(2) synthase-1 (mPGES1), which converts COX-1/COX-2-derived PGH(2) to PGE(2). We show that mPGES1 determines PGE(2) levels in the naive lung and is required for increases in PGE(2) after OVA-induced allergy. Although loss of either COX-1 or COX-2 increases the disease severity, surprisingly, mPGES1(-/-) mice show reduced inflammation. However, an increase in serum IgE is still observed in the mPGES1(-/-) mice, suggesting that loss of PGE(2) does not impair induction of a Th2 response. Furthermore, mPGES1(-/-) mice expressing a transgenic OVA-specific TCR are also protected, indicating that PGE(2) acts primarily after challenge with inhaled Ag. PGE(2) produced by the lung plays the critical role in this response, as loss of lung mPGES1 is sufficient to protect against disease. Together, this supports a model in which mPGES1-dependent PGE(2) produced by populations of cells native to the lung contributes to the effector phase of some allergic responses.
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Affiliation(s)
- Rachel J Church
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Kupfahl C, Tsikas D, Niemann J, Geginat G, Hof H. Production of prostaglandins, isoprostanes and thromboxane by Aspergillus fumigatus: Identification by gas chromatography–tandem mass spectrometry and quantification by enzyme immunoassay. Mol Immunol 2012; 49:621-7. [DOI: 10.1016/j.molimm.2011.10.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 10/27/2011] [Accepted: 10/30/2011] [Indexed: 10/15/2022]
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Deppong CM, Xu J, Brody SL, Green JM. Airway epithelial cells suppress T cell proliferation by an IFNγ/STAT1/TGFβ-dependent mechanism. Am J Physiol Lung Cell Mol Physiol 2011; 302:L167-73. [PMID: 22003092 DOI: 10.1152/ajplung.00188.2011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Organ-specific regulation of immune responses relies on the exchange of information between nonimmune and immune cells. In a primary culture model of the lung airway, we demonstrate that T cell proliferation is potently inhibited by airway epithelial cells (ECs). This is mediated by activation of the IFNγ/STAT1 pathway in the EC and transforming growth factor-β (TGFβ)-dependent suppression of T cell proliferation. In this way, the EC can restrict the expansion of T cells. Given the constant exposure of the airway to inhaled antigen, this may be important in setting a threshold for the initiation of T cell-dependent immune responses and preventing unwanted, chronic inflammation.
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Affiliation(s)
- Christine M Deppong
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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