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Liu Y, Li P, Jiang T, Li Y, Wang Y, Cheng Z. Epidermal growth factor receptor in asthma: A promising therapeutic target? Respir Med 2023; 207:107117. [PMID: 36626942 DOI: 10.1016/j.rmed.2023.107117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/09/2023]
Abstract
Activation of the epidermal growth factor receptor (EGFR) pathway is involved in the pathogenesis of asthma. Although decades of intensive research have focused on the role of EGFR in asthma, the specific mechanisms and pathways of EGFR signaling remain unclear. Various reports have indicated that inhibition of EGFR improves the pathological features in asthma models. However, extending these experimental findings to clinical applications is difficult. Several measures can be adopted to promote clinical application of EGFR inhibitors. This review focuses on the role of EGFR in the pathogenesis of asthma and the development of a potentially novel therapeutic target for asthma.
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Affiliation(s)
- Ye Liu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Pengfei Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Tianci Jiang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Yue Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Yu Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Zhe Cheng
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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2
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Ko HM, Choi SH, Jee W, Lee SH, Park D, Jung JH, Lee BJ, Kim KI, Jung HJ, Jang HJ. Rosa laevigata Attenuates Allergic Asthma Exacerbated by Water-Soluble PM by Downregulating the MAPK Pathway. Front Pharmacol 2022; 13:925502. [PMID: 35837279 PMCID: PMC9274115 DOI: 10.3389/fphar.2022.925502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
Exposure to water-soluble particulate matter (WPM) containing heavy metals can cause severe inflammatory responses and trigger and exacerbate the onset of asthma. As a follow-up study of Rosa laevigata (RL), this study analyzed the therapeutic effects and mechanisms of oral and intratracheal administration of RL and demonstrated anti-inflammatory effects in asthma models. Worse T-helper cell type 2 (Th2)-related inflammatory and pro-inflammatory responses were observed after simultaneous challenge with ovalbumin (OVA) and WPM. To establish a model of asthma exacerbated by WPM, BALB/c mice were sensitized with OVA + aluminum hydroxide and challenged with OVA + WPM. To confirm the therapeutic efficacy of RL, it was administered both orally and intratracheally. Histopathological analysis of H&E staining confirmed that oral and intratracheal administration of RL alleviated inflammatory cell infiltration in the airways aggravated by OVA + WPM. RL effectively reduced the number of inflammatory cells obtained from the bronchoalveolar lavage fluid. In addition, enzyme-linked immunosorbent assay (ELISA) and multiplex analysis of serum samples confirmed that the administration of RL reduced the levels of immuno-globulin E (IgE), Th2-related cytokines, and pro-inflammatory cytokines. Furthermore, real-time PCR analysis of lung tissue samples confirmed that the release of MUC5AC (Mucin 5AC, Oligomeric Mucus/Gel-Forming) and pro-inflammatory cytokines was reduced by RL, and western blotting confirmed that the administration of RL reduced the phosphorylation of ERK and p38 in the MAPK pathway. In conclusion, oral and intratracheal administration of RL appears to have an anti-asthmatic effect by reducing the secretion of Th2-related cytokines, pro-inflammatory cytokines, and IgE by downregulating the MAPK pathway. Thus, RL has further demonstrated potential for development as an oral and inhaled therapeutic for asthma symptoms exacerbated by WPM exposure.
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Affiliation(s)
- Hyun Min Ko
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Seung-Han Choi
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Biological Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Wona Jee
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Seung-Hyeon Lee
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Doil Park
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Ji Hoon Jung
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Beom-Joon Lee
- Department of Biological Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
- Division of Allergy, Immune and Respiratory System, Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
| | - Kwan-Il Kim
- Division of Allergy, Immune and Respiratory System, Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Hee-Jae Jung
- Division of Allergy, Immune and Respiratory System, Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Hyeung-Jin Jang
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
- *Correspondence: Hyeung-Jin Jang,
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Tassew D, Fort S, Mebratu Y, McDonald J, Chu HW, Petersen H, Tesfaigzi Y. Effects of Wood Smoke Constituents on Mucin Gene Expression in Mice and Human Airway Epithelial Cells and on Nasal Epithelia of Subjects with a Susceptibility Gene Variant in Tp53. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:17010. [PMID: 35072516 PMCID: PMC8785869 DOI: 10.1289/ehp9446] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 12/07/2021] [Accepted: 12/20/2021] [Indexed: 05/05/2023]
Abstract
BACKGROUND Exposure to wood smoke (WS) increases the risk for chronic bronchitis more than exposure to cigarette smoke (CS), but the underlying mechanisms are unclear. OBJECTIVE The effect of WS and CS on mucous cell hyperplasia in mice and in human primary airway epithelial cells (AECs) was compared with replicate the findings in human cohorts. Responsible WS constituents were identified to better delineate the pathway involved, and the role of a tumor protein p53 (Tp53) gene polymorphism was investigated. METHODS Mice and primary human AECs were exposed to WS or CS and the signaling receptor and pathway were identified using short hairpin structures, small molecule inhibitors, and Western analyses. Mass spectrometric analysis was used to identify active WS constituents. The role of a gene variant in Tp53 that modifies proline to arginine was examined using nasal brushings from study participants in the Lovelace Smokers Cohort, primary human AECs, and mice with a modified Tp53 gene. RESULTS WS at 25-fold lower concentration than CS increased mucin expression more efficiently in mice and in human AECs in a p53 pathway-dependent manner. Study participants who were homozygous for p53 arginine compared with the proline variant showed higher mucin 5AC (MUC5AC) mRNA levels in nasal brushings if they reported WS exposure. The WS constituent, oxalate, increased MUC5AC levels similar to the whole WS extract, especially in primary human AECs homozygous for p53 arginine, and in mice with a modified Tp53 gene. Further, the anion exchange protein, SLC26A9, when reduced, enhanced WS- and oxalate-induced mucin expression. DISCUSSION The potency of WS compared with CS in inducing mucin expression may explain the increased risk for chronic bronchitis in participants exposed to WS. Identification of the responsible compounds could help estimate the risk of pollutants in causing chronic bronchitis in susceptible individuals and provide strategies to improve management of lung diseases. https://doi.org/10.1289/EHP9446.
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Affiliation(s)
- Dereje Tassew
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Susan Fort
- Chronic Obstructive Pulmonary Disease Program, Lovelace Biomedical Research Institute, Albuquerque, New Mexico, USA
| | - Yohannes Mebratu
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jacob McDonald
- Applied Sciences, Lovelace Biomedical Research Institute, Albuquerque, New Mexico, USA
| | - Hong Wei Chu
- Department of Medicine, National Jewish Health, Denver, Colorado, USA
| | - Hans Petersen
- Chronic Obstructive Pulmonary Disease Program, Lovelace Biomedical Research Institute, Albuquerque, New Mexico, USA
| | - Yohannes Tesfaigzi
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Abstract
There are multiple proinflammatory pathways in the pathogenesis of asthma. These include both innate and adaptive inflammation, in addition to inflammatory and physiologic responses mediated by eicosanoids. An important component of the innate allergic immune response is ILC2 activated by interleukin (IL)-33, thymic stromal lymphopoietin, and IL-25 to produce IL-5 and IL-13. In terms of the adaptive T-lymphocyte immunity, CD4+ Th2 and IL-17-producing cells are critical in the inflammatory responses in asthma. Last, eicosanoids involved in asthma pathogenesis include prostaglandin D2 and the cysteinyl leukotrienes that promote smooth muscle constriction and inflammation that propagate allergic responses.
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Affiliation(s)
- R Stokes Peebles
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, VUMC, T-1218 MCN, 1161 21st Avenue South, Nashville, TN 37232-2650, USA; Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, VUMC, T-1218 MCN, 1161 21st Avenue South, Nashville, TN 37232-2650, USA.
| | - Mark A Aronica
- Department of Pathobiology, Respiratory Institute, Cleveland Clinic Lerner College of Medicine, CWRU, 9500 Euclid Avenue, NB2-85, Cleveland, OH 44195, USA
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Wang Z, Wang C, Wang Y, Mo B, Wei J, Ma L, Rao L, Wang J, Yao D, Huang J, Xu Q, Yang J, Chen G, Mo B. E4BP4 facilitates glucocorticoid sensitivity of human bronchial epithelial cells via down-regulation of glucocorticoid receptor-beta. Cell Immunol 2018; 334:31-37. [PMID: 30153899 DOI: 10.1016/j.cellimm.2018.08.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 08/05/2018] [Accepted: 08/22/2018] [Indexed: 01/25/2023]
Abstract
It has recently been recognized that a subset of asthma patients suffer from glucocorticoid (GC) insensitivity, and glucocorticoid receptor-β (GR-β) is associated with corticosteroid resistance, but the underlying mechanisms remain unknown. Here we demonstrated that Interleukin-17A induced glucocorticoid sensitivity in human bronchial epithelial cells (16HBE) is enhanced, which is depend on E4 promoter-binding protein 4 (E4BP4) mediated GR-β expression. Our data show that the expression of E4BP4 is significantly up-regulated in 16HBE cells, and the depletion of E4BP4 dramatically decreased glucocorticoid sensitivity in IL-17A induced 16HBE cells. Mechanistic studies revealed that E4BP4 plays a crucial role in Interleukin-17A induced glucocorticoid sensitivity in 16HBE cells via down-regulating GR-β, which is probably mediated by PI3K/Akt activation. Collectively, we can draw the conclusion that E4BP4 contribute to enhance the GCs sensitivity, which may offer a new strategy for therapeutic intervention for GC-insensitive asthma.
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Affiliation(s)
- Zhixia Wang
- Department of Respiratory Medicine, Key Cite of National Clinical Resaerch Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha China
| | - Changming Wang
- Department of Respiratory Medicine, Guilin People's Hospital, Guilin, China
| | - Yanni Wang
- Department of Respiratory Medicine, Key Cite of National Clinical Resaerch Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha China
| | - Bifan Mo
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Jianghong Wei
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Libing Ma
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Lizong Rao
- Department of Respiratory Medicine, Key Cite of National Clinical Resaerch Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha China
| | - Jiying Wang
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Dong Yao
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Jianwei Huang
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Qing Xu
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Jinghuan Yang
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Guangsheng Chen
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Biwen Mo
- Department of Respiratory Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, China.
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Sebastian AA, Kannan TP, Norazmi MN, Nurul AA. Interleukin-17A promotes osteogenic differentiation by increasing OPG/RANKL ratio in stem cells from human exfoliated deciduous teeth (SHED). J Tissue Eng Regen Med 2018; 12:1856-1866. [PMID: 29774992 DOI: 10.1002/term.2706] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 04/03/2018] [Accepted: 05/08/2018] [Indexed: 12/19/2022]
Abstract
Stem cells derived from human exfoliated deciduous teeth (SHED) represent a promising cell source for bone tissue regeneration. This study evaluated the effects of interleukin-17A (IL-17A) on the osteogenic differentiation of SHED. SHED were cultured in complete alpha minimum essential medium supplemented with osteoinducing reagents and treated with recombinant IL-17A. The cells were quantitatively analysed for proliferative activity by MTS assay, cell markers expression, and apoptotic activity by flow cytometry. For osteogenic differentiation, alkaline phosphatase (ALP) activity was quantified; mineralization assays were carried out using von Kossa and Alizarin red, and expression of osteogenic markers were analysed by real-time polymerase chain reaction and Western blot. The results showed that treatment with IL-17A increased proliferative activity in a dose-dependent manner, but reduced the expression of stem cell markers (c-Myc and Nanog) as the days progressed. IL-17A induced osteogenic differentiation in SHED as evidenced by high ALP activity, increased matrix mineralization, and upregulation of the mRNA expression of the osteogenic markers ALP, alpha 1 type 1 collagen (Col1A1), runt-related transcription factor 2 (RUNX2), osteopontin (OPN), osteocalcin (OCN), and osteoprotegerin (OPG) but downregulation of receptor activator of nuclear factor κB ligand (RANKL) as well as altering the OPG/RANKL ratio. Findings from our study indicate that IL-17A enhances proliferation and osteogenic differentiation of SHED by regulating OPG/RANKL mechanism thus suggests therapeutic potential of IL-17A in bone regeneration.
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Affiliation(s)
| | - Thirumulu-Ponnuraj Kannan
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia.,Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Mohd-Nor Norazmi
- School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Asma-Abdullah Nurul
- School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
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7
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Fiz I, Bittar Z, Piazza C, Koelmel JC, Gatto F, Ferone D, Fiz F, Di Dio D, Bosse A, Peretti G, Sittel C. Hormone receptors analysis in idiopathic progressive subglottic stenosis. Laryngoscope 2017; 128:E72-E77. [DOI: 10.1002/lary.26931] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/31/2017] [Accepted: 08/22/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Ivana Fiz
- Department of Otorhinolaryngology-Head and Neck Surgery, Katharinenhospital; Stuttgart Germany
| | - Zeid Bittar
- Institute for Pathology; Katharinenhospital Stuttgart Germany
| | - Cesare Piazza
- Department of Otorhinolaryngology-Head and Neck Surgery; University of Brescia; Brescia Italy
| | - Jan Constantin Koelmel
- Department of Otorhinolaryngology-Head and Neck Surgery, Katharinenhospital; Stuttgart Germany
| | - Federico Gatto
- Endocrinology Unit (DiMI), Department of Internal Medicine and Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa; Genoa Italy
| | - Diego Ferone
- Department of Otorhinolaryngology-Head and Neck Surgery; University of Genoa; Genoa Italy
| | - Francesco Fiz
- Nuclear Medicine Unit, Department of Radiology, Uni-Klinikum Tuebingen; Tuebingen Germany
| | - Diana Di Dio
- Department of Otorhinolaryngology-Head and Neck Surgery, Katharinenhospital; Stuttgart Germany
| | - Alexander Bosse
- Institute for Pathology; Katharinenhospital Stuttgart Germany
| | - Giorgio Peretti
- Department of Otorhinolaryngology-Head and Neck Surgery; University of Genoa; Genoa Italy
| | - Christian Sittel
- Department of Otorhinolaryngology-Head and Neck Surgery, Katharinenhospital; Stuttgart Germany
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8
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Liao C, Cheng T, Wang S, Zhang C, Jin L, Yang Y. Shear stress inhibits IL-17A-mediated induction of osteoclastogenesis via osteocyte pathways. Bone 2017; 101:10-20. [PMID: 28414140 DOI: 10.1016/j.bone.2017.04.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 04/13/2017] [Accepted: 04/13/2017] [Indexed: 12/20/2022]
Abstract
Interleukin (IL)-17 is crucial to osteoclast differentiation and activation. Osteocytes support osteoclast formation and are thought to orchestrate bone remodeling in response to fluid flow. The contribution of IL-17 to osteocyte-related bone resorption remains unclear. Here, we used the osteocyte-like MLO-Y4 cell line to examine the role of IL-17 and fluid flow in osteoclastogenesis. It was the first time to demonstrate that IL-17A promoted MLO-Y4 cell proliferation, enhanced expression of receptor activator of nuclear factor κ-B ligand (RANKL) and tumor necrosis factor-α (TNF-α), and induced osteoclastogenesis when MLO-Y4 cells were co-cultured with bone marrow-derived macrophage (BMM) cells. Additionally, shear stress upregulated osteoprotegerin expression in osteocytes, downregulated the effect of IL-17A on RANKL and TNF-α expression, and attenuated IL-17A-activated osteoclastic differentiation in the co-culture system of MLO-Y4 and BMM cells. Furthermore, we explored the signaling pathways that potentially mediate these effects in osteocytes, and found that the extracellular signal-regulated kinase (ERK)1/2 and signal transducer and activator of transcription (STAT3) pathways were suppressed by IL-17A but induced by fluid flow. EphA2 signaling enhances osteoclastogenesis in osteocytes, and the intercellular reversed EphA2-ephrinA2 signaling from osteocytes to BMM play an important role in IL-17A-dependent osteoclastic differentiation. EphB4 signaling inhibits osteoclastogenesis in osteocytes, and the intercellular reversed EphB4-ephrinB2 signaling from osteocytes to BMM could inhibit IL-17A-dependent osteoclastic differentiation. The current findings suggest that IL-17A as a promoter of bone resorption and fluid shear stress critically regulate bone remodeling via osteocyte-specific signaling pathways. IL-17 modulation-based approaches may be developed as a novel therapeutic strategy for enhancing bone remodeling efficiency and stability.
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Affiliation(s)
- Chongshan Liao
- Orthodontics, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China
| | - Tianfan Cheng
- Periodontology, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China
| | - Shuai Wang
- Endodontology, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China
| | - Chengfei Zhang
- Endodontology, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China
| | - Lijian Jin
- Periodontology, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China
| | - Yanqi Yang
- Orthodontics, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, China.
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9
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Schrumpf JA, Amatngalim GD, Veldkamp JB, Verhoosel RM, Ninaber DK, Ordonez SR, van der Does AM, Haagsman HP, Hiemstra PS. Proinflammatory Cytokines Impair Vitamin D-Induced Host Defense in Cultured Airway Epithelial Cells. Am J Respir Cell Mol Biol 2017; 56:749-761. [PMID: 28231019 DOI: 10.1165/rcmb.2016-0289oc] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Vitamin D is a regulator of host defense against infections and induces expression of the antimicrobial peptide hCAP18/LL-37. Vitamin D deficiency is associated with chronic inflammatory lung diseases and respiratory infections. However, it is incompletely understood if and how (chronic) airway inflammation affects vitamin D metabolism and action. We hypothesized that long-term exposure of primary bronchial epithelial cells to proinflammatory cytokines alters their vitamin D metabolism, antibacterial activity, and expression of hCAP18/LL-37. To investigate this, primary bronchial epithelial cells were differentiated at the air-liquid interface for 14 days in the presence of the proinflammatory cytokines, TNF-α and IL-1β (TNF-α/IL-1β), and subsequently exposed to vitamin D (inactive 25(OH)D3 and active 1,25(OH)2D3). Expression of hCAP18/LL-37, vitamin D receptor, and enzymes involved in vitamin D metabolism (CYP24A1 and CYP27B1) was determined using quantitative PCR, Western blot, and immunofluorescence staining. Furthermore, vitamin D-mediated antibacterial activity was assessed using nontypeable Haemophilus influenzae. We found that TNF-α/IL-1β treatment reduced vitamin D-induced expression of hCAP18/LL-37 and killing of nontypeable H. influenzae. In addition, CYP24A1 (a vitamin D-degrading enzyme) was increased by TNF-α/IL-1β, whereas CYP27B1 (that converts 25(OH)D3 to its active form) and vitamin D receptor expression remained unaffected. Furthermore, we have demonstrated that the TNF-α/IL-1β-mediated induction of CYP24A1 was, at least in part, mediated by the transcription factor specific protein 1, and the epidermal growth factor receptor-mitogen-activated protein kinase pathway. These findings indicate that TNF-α/IL-1β decreases vitamin D-mediated antibacterial activity and hCAP18/LL-37 expression via induction of CYP24A1 and suggest that chronic inflammation impairs protective responses induced by vitamin D.
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Affiliation(s)
- Jasmijn A Schrumpf
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Gimano D Amatngalim
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Joris B Veldkamp
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Renate M Verhoosel
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Dennis K Ninaber
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Soledad R Ordonez
- 2 Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, the Netherlands
| | - Anne M van der Does
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Henk P Haagsman
- 2 Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, the Netherlands
| | - Pieter S Hiemstra
- 1 Department of Pulmonology, Leiden University Medical Center, Leiden, the Netherlands; and
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10
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Numasaki M, Tsukamoto H, Tomioka Y, Nishioka Y, Ohrui T. A Heterodimeric Cytokine, Consisting of IL-17A and IL-17F, Promotes Migration and Capillary-Like Tube Formation of Human Vascular Endothelial Cells. TOHOKU J EXP MED 2017; 240:47-56. [PMID: 27594509 DOI: 10.1620/tjem.240.47] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The interleukin (IL)-17 family, consisting of six homodimeric cytokines IL-17A, IL-17B, IL-17C, IL-17D, IL-17E/IL-25, and IL-17F, mediates a variety of biological activities including regulation of chemokine secretion and angiogenesis. Among the IL-17 family members, IL-17A and IL-17E/IL-25 are angiogenesis stimulators, while IL-17B and IL-17F are angiogenesis inhibitors. Recently, IL-17A/F heterodimer, comprised of the IL-17A and IL-17F subunits, was found as another member of the IL-17 cytokine family. However, to date, it has been unknown whether IL-17A/F has biological actions to affect the angiogenesis-related vascular endothelial functions. Therefore, in this study, we investigated the biological effects of IL-17A/F on the growth, migration and capillary-like tube formation of vascular endothelial cells. Recombinant IL-17A/F protein had no direct effects on the growth of human dermal microvascular endothelial cells (HMVECs), whereas, after 4-hour incubation in a modified Boyden Chemotaxicell chamber, IL-17A/F significantly induced migration of HMVECs over a wide range of doses via the phosphatidylinositol-3 kinase (PI3K) signaling pathway. We further investigated the biological effect of IL-17A/F on capillary-like tube formation using a co-culture system of human umbilical vein endothelial cells (HUVECs) and human dermal fibroblasts (HDFs), which mimicked the in vivo microenvironment. In this co-culture system, IL-17A/F significantly promoted capillary-like endothelial tube formation in a dose-dependent fashion via the PI3K and extracellular signal-regulated kinase (ERK) signaling pathways. Additionally, IL-17A/F up-regulated secretion of angiogenic growth factors such as IL-8 and growth-related oncogene (GRO)-α by HDFs. These findings identify a novel biological function for IL-17A/F as an indirect angiogenic agent.
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Affiliation(s)
- Muneo Numasaki
- Laboratory of Clinical Science and Biomedicine, Faculty of Pharmaceutical Sciences, Josai University
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11
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The Role of IL-17 and Related Cytokines in Inflammatory Autoimmune Diseases. Mediators Inflamm 2017; 2017:3908061. [PMID: 28316374 PMCID: PMC5337858 DOI: 10.1155/2017/3908061] [Citation(s) in RCA: 285] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 02/01/2017] [Indexed: 12/12/2022] Open
Abstract
Interleukin-17 (IL-17) induces the production of granulocyte colony-stimulating factor (G-CSF) and chemokines such as CXCL1 and CXCL2 and is a cytokine that acts as an inflammation mediator. During infection, IL-17 is needed to eliminate extracellular bacteria and fungi, by inducing antimicrobial peptides such as defensin. This cytokine also plays an important role in chronic inflammation that occurs during the pathogenesis of autoimmune diseases and allergies such as human rheumatoid arthritis (RA) for which a mouse model of collagen-induced arthritis (CIA) is available. In autoimmune diseases such as RA and multiple sclerosis (MS), IL-17 is produced by helper T (Th) cells that are stimulated by IL-1β and IL-6 derived from phagocytes such as macrophages and from tissue cells. IL-17 contributes to various lesions that are produced by Th17 cells, one subset of helper T cells, and by γδ T cells and innate lymphoid cells. It strongly contributes to autoimmune diseases that are accompanied by chronic inflammation. Thus, a functional understanding of Th17 cells is extremely important. In this review, we highlight the roles of cytokines that promote the development and maintenance of pathogenic Th17 cells in autoimmune diseases.
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Honda K, Wada H, Nakamura M, Nakamoto K, Inui T, Sada M, Koide T, Takata S, Yokoyama T, Saraya T, Kurai D, Ishii H, Goto H, Takizawa H. IL-17A synergistically stimulates TNF-α-induced IL-8 production in human airway epithelial cells: A potential role in amplifying airway inflammation. Exp Lung Res 2016; 42:205-16. [PMID: 27269887 DOI: 10.1080/01902148.2016.1190796] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Recent reports have suggested an involvement of neutrophilic inflammation driven by interleukin (IL)-17 from Th17 cells, especially in severe, refractory asthma. It remains unknown about the possible interactions of this cytokine and other proinflammatory cytokines to direct neutrophilic airway inflammation. MATERIALS AND METHODS We evaluated the effects of IL-17A, IL-17E, and IL-17F in combination with other stimuli such as tumor necrosis factor (TNF) -α on the production and expression of IL-8 in human bronchial epithelial cells. We also studied their effects on other cytokine production. The possible role of mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) signaling pathways was evaluated by specific inhibitors. We examined the effects of anti-asthma drugs, such as steroids or salmeterol. RESULTS IL-17A alone induced only a minimal effect on IL-8 expression. IL-17A, but not IL-17E or IL-17F, in combination with TNF-α showed a synergistic effect on IL-8 expression. Similar findings were found when combination with IL-1β and IL-17A were used, but such was not the case with lipopolysaccharide (LPS). In addition, we further found such synergy on GM-CSF production. The synergy with TNF-α and IL-17A was significantly inhibited by MAPKs inhibitors. Corticosteroids such as fluticasone propionate and dexamethasone, but not salmeterol, partially suppressed the IL-17A and TNF-α-induced IL-8 production. CONCLUSIONS IL-17A in the combination with TNF-α or IL-1β showed a synergistic augmenting effect on IL-8 and GM-CSF production in human airway epithelial cells.
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Affiliation(s)
- Kojiro Honda
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Hiroo Wada
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Masuo Nakamura
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Keitaro Nakamoto
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Toshiya Inui
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Mitsuru Sada
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Takashi Koide
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Saori Takata
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Takuma Yokoyama
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Takeshi Saraya
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Daisuke Kurai
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Haruyuki Ishii
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Hajime Goto
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
| | - Hajime Takizawa
- a Department of Respiratory Medicine , Kyorin University School of Medicine , Tokyo , Japan
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Autocrine Acetylcholine, Induced by IL-17A via NFκB and ERK1/2 Pathway Activation, Promotes MUC5AC and IL-8 Synthesis in Bronchial Epithelial Cells. Mediators Inflamm 2016; 2016:9063842. [PMID: 27298519 PMCID: PMC4889862 DOI: 10.1155/2016/9063842] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 04/07/2016] [Accepted: 04/18/2016] [Indexed: 02/07/2023] Open
Abstract
IL-17A is overexpressed in the lung during acute neutrophilic inflammation. Acetylcholine (ACh) increases IL-8 and Muc5AC production in airway epithelial cells. We aimed to characterize the involvement of nonneuronal components of cholinergic system on IL-8 and Muc5AC production in bronchial epithelial cells stimulated with IL-17A. Bronchial epithelial cells were stimulated with recombinant human IL-17A (rhIL-17A) to evaluate the ChAT expression, the ACh binding and production, the IL-8 release, and the Muc5AC production. Furthermore, the effectiveness of PD098,059 (inhibitor of MAPKK activation), Bay11-7082 (inhibitor of IkBα phosphorylation), Hemicholinium-3 (HCh-3) (choline uptake blocker), and Tiotropium bromide (Spiriva®) (anticholinergic drug) was tested in our in vitro model. We showed that rhIL-17A increased the expression of ChAT, the levels of ACh binding and production, and the IL-8 and Muc5AC production in stimulated bronchial epithelial cells compared with untreated cells. The pretreatment of the cells with PD098,059 and Bay11-7082 decreased the ChAT expression and the ACh production/binding, while HCh-3 and Tiotropium decreased the IL-8 and Muc5AC synthesis in bronchial epithelial cells stimulated with rhIL-17A. IL-17A is involved in the IL-8 and Muc5AC production promoting, via NFκB and ERK1/2 pathway activation, the synthesis of ChAT, and the related activity of autocrine ACh in bronchial epithelial cells.
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Association between Serum Interleukin-17A Level and High-Altitude Deacclimatization Syndrome. Mediators Inflamm 2016; 2016:1732352. [PMID: 27190491 PMCID: PMC4848448 DOI: 10.1155/2016/1732352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/12/2016] [Accepted: 01/19/2016] [Indexed: 11/29/2022] Open
Abstract
High-altitude deacclimatization syndrome (HADAS) is emerging as a severe public health issue that threatens the quality of life of individuals who return to lower altitude from high altitude. In this study, we measured serum levels of SOD, MDA, IL-17A, IL-10, TNF-α, and HADAS score in HADAS subjects at baseline and 50th and 100th days and to evaluate the relationship between interleukins, including IL-17A, and HADAS. Our data showed that and the serum IL-17A levels and HADAS score decreased over time in the HADAS group, and serum IL-17A levels were significantly higher in the HADAS group at baseline and 50th day compared with controls (p < 0.05). Furthermore, baseline serum levels of MDA and TNF-α were significantly higher, while SOD and IL-10 levels were lower in HADAS subjects compared with controls (p < 0.05). It is interesting that serum levels of IL-17A were clearly interrelated with HADAS incidence and severity (p < 0.05). ROC curve analysis showed that combined serum IL-17A and IL-10 levels were a better predictor of HADAS incidence than serum levels of IL-17A or IL-10 alone. These data suggest that serum levels of IL-17A are a novel predictive index of HADAS.
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Tian A, Ma H, Zhang R, Tan W, Wang X, Wu B, Wang J, Wan C. Interleukin17A Promotes Postoperative Cognitive Dysfunction by Triggering β-Amyloid Accumulation via the Transforming Growth Factor-β (TGFβ)/Smad Signaling Pathway. PLoS One 2015; 10:e0141596. [PMID: 26509545 PMCID: PMC4624903 DOI: 10.1371/journal.pone.0141596] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 10/09/2015] [Indexed: 02/05/2023] Open
Abstract
Although postoperative cognitive dysfunction (POCD) is relatively common in elderly patients who have undergone major surgery, the mechanisms underlying this postoperative complication are unclear. Previously, we have investigated the role of cytokine-mediated hippocampal inflammation in the development of POCD in a rat model. Here, we sought to determine in mice the role of cytokine interleukin17A (IL17A) in POCD and to characterize the associated signaling pathways. Old mice underwent hepatectomy surgery in the presence or absence of IL17A monoclonal antibody, and cognitive function, hippocampal neuroinflammation, and pathologic markers of Alzheimer’s disease (AD) were assessed. We found that the level of IL17A in the hippocampus was increased in hepatectomy mice and that cognitive impairment after surgery was associated with the appearance of certain pathological hallmarks of AD: activation of astrocytes, β-amyloid1-42 (Aβ1–42) production, upregulation of transforming growth factor-β (TGFβ), and increased phosphorylation of signaling mother against decapentaplegic peptide 3 (Smad3) protein in the hippocampus. Surgery-induced changes in cognitive dysfunction and changes in Aβ1–42 and TGFβ/Smad signaling were prevented by the administration of IL17A monoclonal antibody. In addition, IL17A-stimulated TGFβ/Smad activation and Aβ1–42 expression were reversed by IL17A receptor small interfering RNA and a TGFβ receptor inhibitor in cultured astrocytes. Our findings suggest that surgery can provoke IL17A-related hippocampal damage, as characterized by activation of astrocytes and TGFβ/Smad pathway dependent Aβ1–42 accumulation in old subjects. These changes likely contribute to the cognitive decline seen in POCD.
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Affiliation(s)
- Ayong Tian
- Department of Anesthesiology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Hong Ma
- Department of Anesthesiology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
- * E-mail:
| | - Rongwei Zhang
- Department of Gerontology and Geriatrics, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Wenfei Tan
- Department of Anesthesiology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Xiaolong Wang
- Department of Anesthesiology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Binyang Wu
- Department of Anesthesiology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Jun Wang
- Department of Neurology, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
| | - Chengfu Wan
- Department of Pain Medicine, the first Affiliated Hospital of China Medical University, Nanjing North Street 155, Shenyang, Liaoning, China
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Abstract
Asthma remains a major health problem with significant morbidity, mortality and economic costs. In asthma, airway remodelling, which refers to all the microscopic structural changes seen in the airway tissue, has been recognised for many decades and remains one of the defining characteristics of the disease; however, it is still poorly understood. The detrimental pathophysiological consequences of some features of remodelling, like increased airway smooth muscle mass and subepithelial fibrosis, are well documented. However, whether targeting these by therapy would be beneficial is unknown. Although the prevailing thinking is that remodelling is an abnormal response to persistent airway inflammation, recent evidence, especially from studies of remodelling in asthmatic children, suggests that the two processes occur in parallel. The effects of asthma therapy on airway remodelling have not been studied extensively due to the challenges of obtaining airway tissue in the context of clinical trials. Corticosteroids remain the cornerstone of asthma therapy, and their effects on remodelling have been better studied than other drugs. Bronchial thermoplasty is the only asthma therapy to primarily target remodelling, although how it results in the apparent clinical benefits seen is not exactly clear. In this article we discuss the mechanisms of airway remodelling in asthma and review the effects of conventional and novel asthma therapies on the process.
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Affiliation(s)
- Rachid Berair
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, Glenfield Hospital, University of Leicester, Leicester, LE3 9QP, UK
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Abstract
: Interleukin-17 receptor A (IL-17RA) is responsible for both IL-17A and IL-25 (IL-17E) signaling pathways. Current evidences suggest distinct but interactive responses between IL-17A and IL-25 signaling, both of which are critical for intestinal immune homeostasis. IL-17RA is assumed to regulate this counterbalance and therefore becomes a crucial molecule in mucosal immunology. In this review, we will describe the structure of IL-17RA, compare IL-17A and IL-25 signaling pathways, and emphasize on the function of IL-17RA in intestinal inflammation and discuss current evidences of accomplished and ongoing clinical trials with monoclonal antibodies targeting Th17 pathway, especially IL-17RA.
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Tanabe T, Shimokawaji T, Kanoh S, Rubin BK. IL-33 stimulates CXCL8/IL-8 secretion in goblet cells but not normally differentiated airway cells. Clin Exp Allergy 2014; 44:540-52. [PMID: 24479526 DOI: 10.1111/cea.12283] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 01/23/2014] [Accepted: 01/27/2014] [Indexed: 12/26/2022]
Abstract
BACKGROUND IL-13, a helper T cell type 2 (Th2) cytokine, transforms cultured airway epithelial cells to goblet cells, and this is not inhibited by corticosteroids. IL-33 stimulates Th2 cytokines and is highly expressed in airways of persons with asthma. The effect of IL-33 on goblet cell differentiation and cytokine secretion has not been described. OBJECTIVE We examined the effect of IL-33 on CXCL8/IL-8 secretion from goblet or normally differentiated human bronchial epithelial (NHBE) cells and signalling pathways associated with IL-33 activation in these cells. METHODS Normal human bronchial epithelial cells were grown to goblet or normally differentiated ciliated cell phenotype at air-liquid interface in the presence or absence of IL-13. After 14 days, differentiated cells were exposed to IL-33 for 24 h. RESULTS CXCL8/IL-8 secretion into the apical (air) side of the goblet cells was greater than from normally differentiated cells (P < 0.01), and IL-33 stimulated apical CXCL8/IL-8 release from goblet cells, but not from normally differentiated cells (P < 0.01). IL-33 increased ERK 1/2 phosphorylation in goblet cells (P < 0.05), and PD98059, a MAPK/ERK kinase inhibitor, attenuated IL-33-stimulated CXCL8/IL-8 secretion from goblet cells (P < 0.001). IL-13 induced ST2 mRNA (P < 0.02) and membrane-bound ST2 protein expression on the apical side surface of goblet cells compared with normally differentiated cells, and neutralization with anti-ST2R antibody attenuated IL-33-induced apical CXCL8/IL-8 secretion from goblet cells (P < 0.02). CONCLUSIONS AND CLINICAL RELEVANCE Goblet cells secrete CXCL8/IL-8, and this is increased by IL-33 through ST2R-ERK pathway, suggesting a mechanism for enhanced airway inflammation in the asthmatic airway with goblet cell metaplasia.
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Affiliation(s)
- T Tanabe
- Department of Pediatrics, Virginia Commonwealth University School of Medicine, Richmond, VA, USA
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Wu Y, Zhu L, Liu L, Zhang J, Peng B. Interleukin-17A stimulates migration of periodontal ligament fibroblasts via p38 MAPK/NF-κB -dependent MMP-1 expression. J Cell Physiol 2014; 229:292-9. [PMID: 23929359 DOI: 10.1002/jcp.24444] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 08/01/2013] [Indexed: 12/31/2022]
Abstract
Interleukin-17 (IL-17) is a cytokine secreted predominantly by Th17 cells. Although IL-17 is primarily associated with the induction of tissue inflammation, the other biological functions of IL-17, including its wound-healing functions, have yet to be thoroughly explored. Fibroblast proliferation and migration play essential roles in periodontal wound-healing responses. In this study, we report that IL-17A can increase the migration and expression of matrix metalloproteinase (MMP)-1 in human periodontal ligament (PDL) fibroblasts but has no effect on PDL fibroblast proliferation. IL-17A-induced MMP-1 expression led to cell migration, which was attenuated by pre-treatment with IL-17 receptor neutralizing antibody and small interfering RNA (siRNA) for MMP-1. The IL-17A-induced cell migration was also attenuated by its tissue inhibitor of matrix metalloproteinase (TIMP)-1. In addition, a p38 mitogen-activated protein kinase (MAPK) inhibitor (SB203580) inhibited IL-17A-induced increase of the migration and MMP-1 upregulation of PDL fibroblasts. The involvement of p38 MAPK in IL-17A-induced MMP-1 expression and cell migration was further confirmed by transfection of p38α siRNA. A nuclear factor kappaB (NF-κB) inhibitor (pyrrolidine dithiocarbamate) also suppressed the cell migration and MMP-1 expression enhanced by IL-17A. Moreover, transfection with p38α siRNA inhibited IL-17A-induced NF-κB nuclear translocation as well as NF-κB binding activity. Our results suggest that IL-17A enhances the migration of PDL fibroblasts by increasing MMP-1 expression through the IL-17 receptor, p38 MAPK, and NF-κB signal transduction pathways.
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Affiliation(s)
- Yan Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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Xing X, Yang J, Yang X, Wei Y, Zhu L, Gao D, Li M. IL-17A induces endothelial inflammation in systemic sclerosis via the ERK signaling pathway. PLoS One 2013; 8:e85032. [PMID: 24376862 PMCID: PMC3871633 DOI: 10.1371/journal.pone.0085032] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 11/21/2013] [Indexed: 02/06/2023] Open
Abstract
Recent reports have demonstrated that endothelial cells are involved in vascular inflammatory injury in systemic sclerosis (SSc) and interleukin-17A (IL-17A) plays a crucial role in the pathogenesis of SSC. However, little is known about the effects of IL-17A on endothelial cell inflammation in SSC. The aim of our study was to investigate the role of IL-17A in endothelial inflammation. Here, we showed that IL-17A mRNA and protein levels were augmented in the peripheral blood and more IL-17+ lymphocytes infiltrated in the perivascular areas in the involved skin of SSC patients. SSC patient serum induced chemokine and adhesion molecule expression in HUVECs, which was blocked by IL-17A neutralization. IL-17A alone induced chemokine and adhesion molecule expression and promoted T cell-HUVEC adhesion. Extracellular signal-regulated kinase (ERK) inhibition and IL-17A neutralization prominently inhibited chemokine and adhesion molecule expression and blocked T cell-HUVEC adhesion. IL-17A derived from SSC patient serum mediated endothelial cells inflammation by up-regulating chemokines and adhesion molecules, which was blocked by ERK inhibition. These data imply that ERK signal pathway might play a key role in the progression of endothelial injury induced by IL-17A in SSC.
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Affiliation(s)
- Xiaojing Xing
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ji Yang
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaoqin Yang
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yi Wei
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lubing Zhu
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Di Gao
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ming Li
- Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China
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Montalbano AM, Anzalone G, Albano GD, Sano CD, Gagliardo R, Bonanno A, Riccobono L, Nicolini G, Ingrassia E, Gjomarkaj M, Profita M. Beclomethasone dipropionate and formoterol reduce oxidative/nitrosative stress generated by cigarette smoke extracts and IL-17A in human bronchial epithelial cells. Eur J Pharmacol 2013; 718:418-27. [DOI: 10.1016/j.ejphar.2013.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Revised: 07/29/2013] [Accepted: 08/01/2013] [Indexed: 02/03/2023]
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IL-17A and Th17 cells in lung inflammation: an update on the role of Th17 cell differentiation and IL-17R signaling in host defense against infection. Clin Dev Immunol 2013; 2013:267971. [PMID: 23956759 PMCID: PMC3730142 DOI: 10.1155/2013/267971] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Accepted: 06/27/2013] [Indexed: 02/06/2023]
Abstract
The significance of Th17 cells and interleukin- (IL-)17A signaling in host defense and disease development has been demonstrated in various infection and autoimmune models. Numerous studies have indicated that Th17 cells and its signature cytokine IL-17A are critical to the airway's immune response against various bacteria and fungal infection. Cytokines such as IL-23, which are involved in Th17 differentiation, play a critical role in controlling Klebsiella pneumonia (K. pneumonia) infection. IL-17A acts on nonimmune cells in infected tissues to strengthen innate immunity by inducing the expression of antimicrobial proteins, cytokines, and chemokines. Mice deficient in IL-17 receptor (IL-17R) expression are susceptible to infection by various pathogens. In this review, we summarize the recent advances in unraveling the mechanism behind Th17 cell differentiation, IL-17A/IL-17R signaling, and also the importance of IL-17A in pulmonary infection.
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Meephansan J, Komine M, Tsuda H, Karakawa M, Tominaga SI, Ohtsuki M. Expression of IL-33 in the epidermis: The mechanism of induction by IL-17. J Dermatol Sci 2013; 71:107-14. [PMID: 23764374 DOI: 10.1016/j.jdermsci.2013.04.014] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 04/08/2013] [Accepted: 04/11/2013] [Indexed: 12/13/2022]
Abstract
BACKGROUND Interleukin (IL)-33 is a dual functional, IL-1 family member cytokine, whose exact roles in inflammatory skin diseases are still unknown. IL-17A is a key cytokine in the pathogenesis of psoriasis. OBJECTIVES We investigated if IL-17A could induce IL-33 in epidermal keratinocytes, and the signaling mechanisms involved. METHODS IL-33 levels were evaluated by RT-PCR and western blot in human keratinocytes following IL-17A simulation. IL-33 immunohistochemical staining of psoriatic skin samples was also performed and compared with that of control tissues. The role of signaling pathways downstream of IL-17A was investigated using small molecule inhibitors of EGFR, ERK, p38, and JAK. Adenovirus vector expressing dominant negative STAT1 was also utilized. RESULTS IL-33 and its receptor, ST2L, were expressed in the psoriatic epidermis, and the associated infiltrating cells. IL-17A induced IL-33 expression at mRNA and protein levels in a time- and concentration-dependent manner. IL-17A caused phosphorylation of EGFR, ERK, p38, and STAT1. IL-17A-induced IL-33 expression was blocked by the addition of EGFR, ERK, p38, and JAK inhibitors, and dominant negative STAT1-expressing adenovirus vector. CONCLUSION IL-17A induced IL-33 in NHEKs through EGFR, ERK, p38, and JAK/STAT1 pathways, which were necessary for the induction of IL-33. IL-33, induced by IL-17A in epidermal keratinocytes, may be involved in the pathophysiology of inflammatory skin diseases, including psoriasis.
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Affiliation(s)
- Jitlada Meephansan
- Department of Dermatology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan
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Abstract
Asthma is perceived as a heterogeneous disease with several clinical phenotypes and triggering factors. In general, cytokines from T-helper 2 cells are believed to be critical contributors of asthma. In recent years, IL-17, another T-helper lymphocyte-associated cytokine, has been put forward as another potentially important mediator of asthma. Currently, several drugs that target IL-17 signaling are being tested in clinical trials. With the aim to find whether there are any specific features of this heterogeneous disease that potentially could be relieved by the use of IL-17-targeting drugs, this review scrutinizes the evidence for an involvement of IL-17 in human asthma.
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Affiliation(s)
- Elin Silverpil
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK.
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IL-17 and FGF signaling involved in mouse mesenchymal stem cell proliferation. Cell Tissue Res 2011; 346:305-16. [PMID: 22160457 DOI: 10.1007/s00441-011-1284-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 11/11/2011] [Indexed: 02/07/2023]
Abstract
The mouse is a suitable experimental model to study the biology of mesenchymal stem cells (MSCs), as well as to be used in biocompatibility studies and tissue engineering models. However, the isolation and purification of murine MSCs is far more challenging than their counterparts from other species. In this study, we isolated, expanded and characterized mouse MSCs from bone marrow (BM-MSCs). Additionally, we analyzed the effects of two regulatory molecules, interleukin 17 (IL-17) and basic fibroblast growth factor (bFGF), on BM-MSCs growth and elucidated the signaling pathways involved. The results revealed that IL-17 increased the frequency of colony-forming units fibroblast (CFU-F) as well as the BM-MSCs proliferation in a dose-dependent manner, while bFGF supplementation had no significant effect on CFU-F frequency but induced an increase in cell proliferation. Their combined usage did not produce additive effects on BM-MSCs proliferation and even induced reduction in the number of CFU-F. Also, the involvement of both p38 and extracellular signal-regulated kinase (ERK) mitogen-activated protein kinases (MAPKs) signaling in proliferative activity of IL-17 and bFGF on murine BM-MSCs and, moreover, the increased co-activation of a common signaling molecule, p38 MAPK, were demonstrated. Together, the data presented highlighted the role of IL-17 and bFGF in murine BM-MSCs proliferation and pointed to the complexity and specificity of the signaling networks leading to MSCs proliferation in response to different regulatory molecules.
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Interleukin-17A is involved in development of spontaneous pulmonary emphysema caused by Toll-like receptor 4 mutation. Acta Pharmacol Sin 2011; 32:1045-54. [PMID: 21706041 DOI: 10.1038/aps.2011.67] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
AIM To explore the pathogenic role of Th17 cells and interleukin-17A (IL-17A)-associated signaling pathways in spontaneous pulmonary emphysema induced by a Toll-like receptor 4 mutant (TLR4(mut)). METHODS Lungs were obtained from wild-type (WT) or TLR4mut mice that were treated with or without recombinant mouse IL-17A (1 μg·kg(-1)·d(-1), ip) from the age of 3 weeks to 3 months. Pulmonary emphysema was determined using histology, immunochemistry, and biochemical analysis. T cell polarization was determined with flow cytometry, the levels of cytokines were measured using ELISA, and the levels of IL-17A-associated signaling molecules were detected using Western blot. RESULTS Compared to WT mice, 3 month-old TLR4(mut) mice were characterized by significantly reduced infiltration of Th17 cells into lungs (2.49%±1.13 % νs 5.26%±1.39%), and significantly reduced expression levels of IL-17A (3.66±0.99 pg/μg νs 10.67±1.65 pg/μg), IL-23 (12.43±1.28 pg/μg νs 28.71±2.57 pg/μg) and IL-6 (51.82±5.45 pg/μg νs 92.73±10.91 pg/μg) in bronchoalveolar lavage fluid. In addition, p38 MAPK phosphorylation and AP-1 expression were decreased to 27%±9% and 51%±8%, respectively, of that in WT mice. Treatment of TLR4(mut) mice with IL-17A increased the infiltration of Th17 cells into lungs and expression levels of IL-17A, IL-6, and IL-23 in bronchoalveolar lavage fluid, attenuated MDA and apoptosis, and improved emphysema accompanied with increased phosphorylation of p38 MAPK and expression of AP-1. CONCLUSION Th17 cells, in particular the cytokine IL-17A, play a crucial role in the pathogenesis of TLR4(mut)-induced spontaneous pulmonary emphysema. Both of them are potential targets for therapeutic strategies for pulmonary emphysema.
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Chen X, Xie Q, Cheng X, Diao X, Cheng Y, Liu J, Xie W, Chen Z, Zhu B. Role of interleukin-17 in lymphangiogenesis in non-small-cell lung cancer: Enhanced production of vascular endothelial growth factor C in non-small-cell lung carcinoma cells. Cancer Sci 2010; 101:2384-90. [PMID: 20825419 PMCID: PMC11159110 DOI: 10.1111/j.1349-7006.2010.01684.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Interleukin-17 (IL-17), a potent pro-inflammatory cytokine, plays an active role in inflammation and cancer. Recently, we found that increased IL-17-producing cells correlate with poor survival and increased lymphangiogenesis in non-small-cell lung cancer (NSCLC), but the mechanism is unknown. Here, we show that IL-17 promotes lymphangiogenesis via inducing vascular endothelial growth factor-C (VEGF-C) production by lung cancer cells. We found that IL-17 receptor (IL-17R) is expressed on the surface of Lewis lung carcinoma (LLC) cells but not on lymphatic endothelial cells (LEC). Moreover, LEC chemotaxis and tube formation (measures of net lymphangiogenic potential) were increased by conditioned medium from recombinant mouse IL-17 (rmIL-17)-stimulated LLC but not by rmIL-17. Interleukin-17 increased production of VEGF-C in lung cancer cell lines. The enhanced chemotaxis and endothelial cord formation in the presence of LLC/rmIL-17 was inhibited by addition of recombinant mouse VEGF R3/Fc chimera. Treatment of the A549 cells with rIL-17 significantly increased VEGF-C expression, which was extracellular signal-regulated protein kinase 1/2 (ERK 1/2) dependent. Importantly, we found significant correlations between IL-17 expression, VEGF-C expression and lymphatic vascular density (LVD) in NSCLC. We conclude that IL-17 is involved in lymphangiogenesis in NSCLC by enhancing production of VEGF-C, and IL-17 may be an important target for the treatment of NSCLC.
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Affiliation(s)
- Xi Chen
- Institute of Cancer Institute of Respiratory Diseases Department of Pathology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
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Abstract
Naive CD4 cells are capable of integrating signals from antigen-activated cells of the innate immune system and differentiating into effector CD4 cells, also termed T helper (Th) cells. According to the traditional paradigm explaining adaptive CD4 cell responses, there are two subsets of Th cells: the Th-1 and Th-2 subset. Each of these subsets undergoes a distinct differentiation pathway (a pathway that is characterized by a unique profile of cytokine production and has specific immunoregulatory functions). However, recent studies in mouse models have forwarded evidence of a third subset of Th cells: the Th-17 subset. As indicated predominantly in studies on mice, the Th-17 subset is characterized by an ability to produce the neutrophil-mobilizing cytokine IL-17 in response to stimulation with the cytokine IL-23, an IL-12-related cytokine released from antigen-presenting cells. There is now a growing body of evidence from animal models that the Th-17 subset plays an important role in host defence in the lungs and other organs. Altered IL-17 levels have also been demonstrated in human patients with asthma, exacerbations of cystic fibrosis or following lung transplantation. There is now also evidence that the Th-17 subset is functionally distinct from the Th-2 subset but little is known of the functional inter-relationship between the Th-1 and Th-17 cell subsets; this is particularly true in human lungs. It has been proposed that the Th-17 subset plays a unique role by linking the arms of innate and adaptive immunity. Thus, an improved understanding of the human correlate to the Th-17 subset may reveal new targets for pharmacotherapy against lung disorders that are characterized by aberrant innate responses in host defense.
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Affiliation(s)
- Stefan Ivanov
- Lung Immunology & Pharmacology Groups, Department of Internal Medicine/Respiratory Medicine and Allergology, Institute of Medicine Sahlgrenska Academy at Göteborg University, Guldhedsgatan 10 A, S-413 46 Gothenburg, Sweden.
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Wang Q, Li H, Yao Y, Xia D, Zhou J. The overexpression of heparin-binding epidermal growth factor is responsible for Th17-induced airway remodeling in an experimental asthma model. THE JOURNAL OF IMMUNOLOGY 2010; 185:834-41. [PMID: 20530256 DOI: 10.4049/jimmunol.0901490] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Th17 cells that produce IL-17 have been found to participate in the development of allergy-triggered asthma. However, whether they play a causative role in the pathogenesis of airway remodeling in chronic asthma remains unclear. In this study, we investigated the role of Th17 cells in airway remodeling and the possible involvement of epidermal growth factor (EGF) receptor signals downstream of Th17. We established a C57BL/6 mouse model of prolonged allergen challenge that exhibits many characteristics of airway remodeling. Prolonged allergen challenge induced a progressive increase in the number of airway-infiltrating Th17 cells, and Th17 counts positively correlated with the severity of airway remodeling. Increases in mucus production, airway smooth muscle (ASM) mass, peribronchial collagen deposition, and airway heparin-binding EGF (HB-EGF) expression have been observed in sensitized mice following prolonged allergen exposure or adoptive Th17 transfer; remarkably, these effects can be abrogated by treatment with anti-IL-17 mAb. Both the EFGR inhibitor AG1478 and an anti-HB-EGF mAb ameliorated all of these effects, except for peribronchial collagen deposition in the presence of high levels of IL-17. In vitro, Th17 cells enhanced the airway epithelial expression of HB-EGF in a coculture of the two cells. The conditioned medium obtained from this coculture system effectively promoted ASM proliferation; this response was dramatically abolished by anti-HB-EGF mAb but not Abs against other EGF receptor ligands or IL-17. These observations demonstrated that overexpression of airway HB-EGF induced by IL-17 secreted from redundant expanding Th17 cells might contribute to excessive mucus expression and ASM proliferation in chronic asthma.
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Affiliation(s)
- Qing Wang
- Department of Respiratory Diseases, First Affiliated Hospital of College of Medicine, Hangzhou, Zhejiang, People's Republic of China
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Ma X, Reynolds SL, Baker BJ, Li X, Benveniste EN, Qin H. IL-17 enhancement of the IL-6 signaling cascade in astrocytes. THE JOURNAL OF IMMUNOLOGY 2010; 184:4898-906. [PMID: 20351184 DOI: 10.4049/jimmunol.1000142] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Astrocytes have important physiological roles in CNS homeostasis and serve as a bridge between the CNS and immune system. IL-17 and IL-6 are important in many CNS disorders characterized by neuroinflammation. We examined the role of IL-17 on the IL-6 signaling cascade in primary astrocytes. IL-17 functioned in a synergistic manner with IL-6 to induce IL-6 expression in astrocytes. The synergistic effect involved numerous signaling pathways including NF-kappaB, JNK MAPK, and p38 MAPK. The NF-kappaB pathway inhibitor BAY-11, JNK inhibitor JNKi II, and p38 inhibitor SB203580 suppressed the synergistic effect of IL-6 and IL-17 on IL-6 expression. IL-17 synergized with IL-6 to enhance the recruitment of activated NF-kappaB p65, c-Fos, c-Jun, and the histone acetyltransferases CREB-binding protein and p300 to the IL-6 promoter in vivo to induce IL-6 transcription. This was accompanied by enhanced acetylation of histones H3 and H4 on the IL-6 promoter. Moreover, we elucidated an important role for suppressor of cytokine signaling (SOCS) 3 in IL-17 enhancement of IL-6 signaling in astrocytes. SOCS3 small interfering RNA knockdown and SOCS3 deletion in astrocytes augmented the synergistic effect of IL-6 and IL-17 due to an enhancement of activation of the NF-kappaB and MAPK pathways. These results indicate that astrocytes can serve as a target of Th17 cells and IL-17 in the CNS, and SOCS3 participates in IL-17 functions in the CNS as a negative feedback regulator.
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Affiliation(s)
- Xiangyu Ma
- Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Kang Z, Altuntas CZ, Gulen MF, Liu C, Giltiay N, Qin H, Liu L, Qian W, Ransohoff RM, Bergmann C, Stohlman S, Tuohy VK, Li X. Astrocyte-restricted ablation of interleukin-17-induced Act1-mediated signaling ameliorates autoimmune encephalomyelitis. Immunity 2010; 32:414-25. [PMID: 20303295 DOI: 10.1016/j.immuni.2010.03.004] [Citation(s) in RCA: 229] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2009] [Revised: 01/09/2010] [Accepted: 03/01/2010] [Indexed: 12/21/2022]
Abstract
Interleukin-17 (IL-17) secreted by T helper 17 (Th17) cells is essential in the development of experimental autoimmune encephalomyelitis (EAE). However, it remains unclear how IL-17-mediated signaling in different cellular compartments participates in the central nervous system (CNS) inflammatory process. We examined CNS inflammation in mice with specific deletion of Act1, a critical component required for IL-17 signaling, in endothelial cells, macrophages and microglia, and neuroectoderm (neurons, astrocytes, and oligodendrocytes). In Act1-deficient mice, Th17 cells showed normal infiltration into the CNS but failed to recruit lymphocytes, neutrophils, and macrophages. Act1 deficiency in endothelial cells or in macrophages and microglia did not substantially impact the development of EAE. However, targeted Act1 deficiency in neuroectoderm-derived CNS-resident cells resulted in markedly reduced severity in EAE. Specifically, Act1-deficient astrocytes showed impaired IL-17-mediated inflammatory gene induction. Thus, astroctyes are critical in IL-17-Act1-mediated leukocyte recruitment during autoimmune-induced inflammation of the CNS.
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Affiliation(s)
- Zizhen Kang
- Department of Immunology, Cleveland Clinic, Cleveland, OH 44195, USA
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Huang H, Kim HJ, Chang EJ, Lee ZH, Hwang SJ, Kim HM, Lee Y, Kim HH. IL-17 stimulates the proliferation and differentiation of human mesenchymal stem cells: implications for bone remodeling. Cell Death Differ 2009; 16:1332-43. [PMID: 19543237 DOI: 10.1038/cdd.2009.74] [Citation(s) in RCA: 186] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Interleukin-17 (IL-17) is a cytokine secreted primarily by T(H)-17 cells. Although IL-17 is primarily associated with the induction of tissue inflammation, the other biological roles of IL-17, including non-immune functions, have yet to be thoroughly explored. Here, we report that T-cell-produced IL-17 can induce proliferation of human bone marrow-derived mesenchymal stem cells (hMSCs) in a manner dependent on the generation of reactive oxygen species (ROS). Rac1 GTPase and NADPH oxidase 1 (Nox1) are activated by IL-17 to produce ROS, which in turn stimulates hMSC proliferation. The activation of the MEK-ERK pathway is also crucial for IL-17-dependent hMSC proliferation. TRAF6 and Act1 are required to activate Nox 1 and to phosphorylate MEK on IL-17 stimulation. Interestingly, IL-17 not only accelerates the proliferation of hMSCs, but also induces their migration, motility, and osteoblastic differentiation. Furthermore, IL-17 induces the expression of M-CSF and receptor activator of NF-kappaB ligand (RANKL) on hMSCs, thereby supporting osteoclastogenesis both in vivo and in vitro. On the basis of these results, we suggest that IL-17 can function as a signal to induce extensive bone turnover by regulating hMSC recruitment, proliferation, motility, and differentiation.
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Affiliation(s)
- H Huang
- Department of Cell and Developmental Biology, BK21 and DRI, Seoul National University School of Dentistry, Seoul 110-749, Korea
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McKinstry KK, Strutt TM, Buck A, Curtis JD, Dibble JP, Huston G, Tighe M, Hamada H, Sell S, Dutton RW, Swain SL. IL-10 deficiency unleashes an influenza-specific Th17 response and enhances survival against high-dose challenge. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2009; 182:7353-63. [PMID: 19494257 PMCID: PMC2724021 DOI: 10.4049/jimmunol.0900657] [Citation(s) in RCA: 232] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We examined the expression and influence of IL-10 during influenza infection. We found that IL-10 does not impact sublethal infection, heterosubtypic immunity, or the maintenance of long-lived influenza Ag depots. However, IL-10-deficient mice display dramatically increased survival compared with wild-type mice when challenged with lethal doses of virus, correlating with increased expression of several Th17-associated cytokines in the lungs of IL-10-deficient mice during the peak of infection, but not with unchecked inflammation or with increased cellular responses. Foxp3(-) CD4 T cell effectors at the site of infection represent the most abundant source of IL-10 in wild-type mice during high-dose influenza infection, and the majority of these cells coproduce IFN-gamma. Finally, compared with predominant Th1 responses in wild-type mice, virus-specific T cell responses in the absence of IL-10 display a strong Th17 component in addition to a strong Th1 response and we show that Th17-polarized CD4 T cell effectors can protect naive mice against an otherwise lethal influenza challenge and utilize unique mechanisms to do so. Our results show that IL-10 expression inhibits development of Th17 responses during influenza infection and that this is correlated with compromised protection during high-dose primary, but not secondary, challenge.
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Affiliation(s)
| | | | - Amanda Buck
- Trudeau Institute, 154 Algonquin Ave, Saranac Lake, NY
| | | | | | - Gail Huston
- Trudeau Institute, 154 Algonquin Ave, Saranac Lake, NY
| | - Michael Tighe
- Trudeau Institute, 154 Algonquin Ave, Saranac Lake, NY
| | | | - Stewart Sell
- Wadsworth Center and Ordway Research Institute, Albany, NY
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Hamada H, Garcia-Hernandez MDLL, Reome JB, Misra SK, Strutt TM, McKinstry KK, Cooper AM, Swain SL, Dutton RW. Tc17, a unique subset of CD8 T cells that can protect against lethal influenza challenge. THE JOURNAL OF IMMUNOLOGY 2009; 182:3469-81. [PMID: 19265125 DOI: 10.4049/jimmunol.0801814] [Citation(s) in RCA: 288] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We show here that IL-17-secreting CD4 T (Th)17 and CD8 T (Tc)17 effector cells are found in the lung following primary challenge with influenza A and that blocking Ab to IL-17 increases weight loss and reduces survival. Tc17 effectors can be generated in vitro using naive CD8 T cells from OT-I TCR-transgenic mice. T cell numbers expand 20-fold and a majority secretes IL-17, but little IFN-gamma. Many of the IL-17-secreting cells also secrete TNF and some secrete IL-2. Tc17 are negative for granzyme B, perforin message, and cytolytic activity, in contrast to Tc1 effectors. Tc17 populations express message for orphan nuclear receptor gammat and FoxP3, but are negative for T-bet and GATA-3 transcription factors. The FoxP3-positive, IL-17-secreting and IFN-gamma-secreting cells represent three separate populations. The IFN-gamma-, granzyme B-, FoxP3-positive cells and cells positive for IL-22 come mainly from memory cells and decrease in number when generated from CD44(low) rather than unselected CD8 T cells. Cells of this unique subset of CD8 effector T cells expand greatly after transfer to naive recipients following challenge and can protect them against lethal influenza infection. Tc17 protection is accompanied by greater neutrophil influx into the lung than in Tc1-injected mice, and the protection afforded by Tc17 effectors is less perforin but more IFN-gamma dependent, implying that different mechanisms are involved.
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Saleh A, Shan L, Halayko AJ, Kung S, Gounni AS. Critical role for STAT3 in IL-17A-mediated CCL11 expression in human airway smooth muscle cells. THE JOURNAL OF IMMUNOLOGY 2009; 182:3357-65. [PMID: 19265112 DOI: 10.4049/jimmunol.0801882] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
IL-17A has been shown to be expressed at higher levels in respiratory secretions from asthmatics and to correlate with airway hyperresponsiveness. Although these studies raise the possibility that IL-17A may influence allergic disease, the mechanism remains unknown. We previously demonstrated that IL-17A mediates CC chemokine (CCL11) production from human airway smooth muscle (ASM) cells. In this study, we demonstrate that STAT3 activation is critical in IL-17A-mediated CCL11 expression in ASM cells. IL-17A mediated a rapid phosphorylation of STAT3 but not STAT6 or STAT5 in ASM cells. Interestingly, transient transfection with wild-type or mutated CCL11 promoter constructs showed that IL-17A-mediated CCL11 expression relies on the STAT6 binding site. However, STAT3 but not STAT6 in vivo binding to the CCL11 promoter was detected following IL-17A stimulation of ASM cells. Overexpression of DN STAT3 (STAT3beta) abolishes IL-17A-induced CCL11 promoter activity. This effect was not observed with STAT6 DN or the STAT3 mutant at Ser(727). Interestingly, disruption of STAT3 activity with the SH2 domain binding peptide, but not with control peptide, results in a significant reduction of IL-17A-mediated STAT3 phosphorylation and CCL11 promoter activity. IL-17A-mediated CCL11 promoter activity and mRNA were significantly diminished in STAT3- but not STAT6-silenced ASM cells. Finally, IL-17A-induced STAT3 phosphorylation was sensitive to pharmacological inhibitors of JAK2 and ERK1/2. Taken together, our data provide the first evidence of IL-17A-mediated gene expression via STAT3 in ASM cells. Collectively, our results raise the possibility that the IL-17A/STAT3 signaling pathway may play a crucial role in airway inflammatory responses.
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Affiliation(s)
- Ali Saleh
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada
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Swaidani S, Bulek K, Kang Z, Liu C, Lu Y, Yin W, Aronica M, Li X. The critical role of epithelial-derived Act1 in IL-17- and IL-25-mediated pulmonary inflammation. THE JOURNAL OF IMMUNOLOGY 2009; 182:1631-40. [PMID: 19155512 DOI: 10.4049/jimmunol.182.3.1631] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-25 initiates, promotes, and augments Th2 immune responses. In this study, we report that Act1, a key component in IL-17-mediated signaling, is an essential signaling molecule for IL-25 signaling. Although Act1-deficient mice showed reduced expression of KC (CXCL1) and neutrophil recruitment to the airway compared with wild-type mice in response to IL-17 stimulation, Act1 deficiency abolished IL-25-induced expression of IL-4, IL-5, IL-13, eotaxin-1 (CCL11), and pulmonary eosinophilia. Using a mouse model of allergic pulmonary inflammation, we observed diminished Th2 responses and lung inflammation in Act1-deficient mice compared with wild-type mice. Importantly, Act1 deficiency in epithelial cells reduced the phenotype of allergic pulmonary inflammation due to loss of IL-17-induced neutrophilia and IL-25-induced eosinophilia, respectively. These results demonstrate the essential role of epithelial-derived Act1 in allergic pulmonary inflammation through the distinct impact of the IL-17R-Act1 and IL-25R-Act1 axes. Such findings are crucial for the understanding of pathobiology of atopic diseases, including allergic asthma, which identifies Act1 as a potential therapeutic target.
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Affiliation(s)
- Shadi Swaidani
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
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Lee JW, Wang P, Kattah MG, Youssef S, Steinman L, DeFea K, Straus DS. Differential Regulation of Chemokines by IL-17 in Colonic Epithelial Cells. THE JOURNAL OF IMMUNOLOGY 2008; 181:6536-45. [DOI: 10.4049/jimmunol.181.9.6536] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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A selective phosphodiesterase 4 (PDE4) inhibitor Zl-n-91 suppresses IL-17 production by human memory Th17 cells. Int Immunopharmacol 2008; 8:1408-17. [PMID: 18687303 DOI: 10.1016/j.intimp.2008.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 05/20/2008] [Accepted: 05/26/2008] [Indexed: 11/21/2022]
Abstract
Th17 cells are highly proinflammatory and involved in the immunopathogenesis of severe autoimmune diseases. Selective phosphodiesterase 4 (PDE4) inhibitors, which elevate intracellular cAMP by inhibiting the hydrolysis of cAMP, have been demonstrated to be an effective anti-inflammatory agent in airway inflammatory diseases. In the present study, we assessed the effect of a selective PDE4 inhibitor Zl-n-91 on IL-17 production by PBMCs and by purified CD4(+) T cells following stimulation. The results for the first time demonstrated that the addition of Zl-n-91 into cell cultures of PBMCs and purified CD4(+) T cells could result in the suppression of IL-17 production at the protein and mRNA levels. Further analysis indicated that Zl-n-91 had a direct inhibitory effect on the IL-17 production by memory Th17 cells via the suppression of activation, proliferation and division of CD4(+) T cells. Our data suggested that Zl-n-91 might have beneficial effects in the treatment of IL-17-related autoimmune diseases.
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Inoue D, Kubo H, Sasaki T, Yasuda H, Numasaki M, Sasaki H, Yamaya M. Erythromycin attenuates MUC5AC synthesis and secretion in cultured human tracheal cells infected with RV14. Respirology 2008; 13:215-20. [PMID: 18339018 DOI: 10.1111/j.1440-1843.2007.01227.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE The common cold is a major cause of asthma exacerbation and chronic obstructive lung disease. Rhinovirus is reported to be responsible for more than 50% of cases of the common cold. In a previous study, we reported that rhinovirus infection of cultured airway cells induced MUC5AC mucin overproduction and hypersecretion by activating the p44/42 mitogen-activated protein kinase (p44/42 MAPK) pathway. The aim of this study was to examine the effect of erythromycin on RV14-induced airway mucin overproduction and hypersecretion. METHODS RV14-infected human tracheal epithelial cells were treated with erythromycin. RESULTS Erythromycin blocked RV14-induced MUC5AC protein overproduction and hypersecretion, and also blocked RV14-induced p44/42 MAPK activation in the cells. CONCLUSIONS Erythromycin may attenuate RV14-induced MUC5AC overproduction and hypersecretion by blocking the p44/42 MAPK pathway or its upstream regulators.
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Affiliation(s)
- Daisuke Inoue
- Department of Geriatrics and Gerontology, Tohoku University Hospital, Sendai, Japan.
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Lee YC, Chuang CY, Lee PK, Lee JS, Harper RW, Buckpitt AB, Wu R, Oslund K. TRX-ASK1-JNK signaling regulation of cell density-dependent cytotoxicity in cigarette smoke-exposed human bronchial epithelial cells. Am J Physiol Lung Cell Mol Physiol 2008; 294:L921-31. [DOI: 10.1152/ajplung.00250.2007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cigarette smoke is a major environmental air pollutant that injures airway epithelium and incites subsequent diseases including chronic obstructive pulmonary disease. The lesion that smoke induces in airway epithelium is still incompletely understood. Using a LIVE/DEAD cytotoxicity assay, we observed that subconfluent cultures of bronchial epithelial cells derived from both human and monkey airway tissues and an immortalized normal human bronchial epithelial cell line (HBE1) were more susceptible to injury by cigarette smoke extract (CSE) and by direct cigarette smoke exposure than cells in confluent cultures. Scraping confluent cultures also caused an enhanced cell injury predominately in the leading edge of the scraped confluent cultures by CSE. Cellular ATP levels in both subconfluent and confluent cultures were drastically reduced after CSE exposure. In contrast, GSH levels were significantly reduced only in subconfluent cultures exposed to smoke and not in confluent cultures. Western blot analysis demonstrated ERK activation in both confluent and subconfluent cultures after CSE. However, activation of apoptosis signal-regulating kinase 1 (ASK1), JNK, and p38 were demonstrated only in subconfluent cultures and not in confluent cultures after CSE. Using short interfering RNA (siRNA) to JNK1 and JNK2 and a JNK inhibitor, we attenuated CSE-mediated cell death in subconfluent cultures but not with an inhibitor of the p38 pathway. Using the tetracycline (Tet)-on inducible approach, overexpression of thioredoxin (TRX) attenuated CSE-mediated cell death and JNK activation in subconfluent cultures. These results suggest that the TRX-ASK1-JNK pathway may play a critical role in mediating cell density-dependent CSE cytotoxicity.
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Mizuta K, Osawa Y, Mizuta F, Xu D, Emala CW. Functional expression of GABAB receptors in airway epithelium. Am J Respir Cell Mol Biol 2008; 39:296-304. [PMID: 18403780 DOI: 10.1165/rcmb.2007-0414oc] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Gamma-aminobutyric acid (GABA) is the major inhibitory neurotransmitter in the mammalian central nervous system and exerts its actions via both ionotropic (GABA(A)) and metabotropic (GABA(B)) receptors. The GABA(B) receptor is a dimer composed of R1 and R2 components and classically couples to the heterotrimeric G(i) protein. In addition to their location on neurons, GABA and functional GABA(B) receptors have been detected in peripheral tissue such as airway smooth muscle. We questioned whether airway epithelium expresses receptors that could respond to GABA. We detected the mRNA encoding multiple-splice variants of the GABA(B)R1 and GABA(B)R2 in total RNA isolated from native human and guinea pig airway epithelium and human airway epithelial cell lines (BEAS-2B and H441). Immunoblots identified the GABA(B)R1 and GABA(B)R2 proteins in both guinea pig airway epithelium and BEAS-2B cells. The expression of GABA(B)R1 protein was immunohistochemically localized to basal mucin-secreting and ciliated columnar epithelial cells in guinea pig trachea. Baclofen inhibited adenylyl cyclase activity, induced ERK phosphorylation and cross-regulated phospholipase C, leading to increased inositol phosphates in BEAS-2B cells in a pertussis toxin-sensitive manner, implicating G(i) protein coupling. Thus, these receptors couple to G(i) and cross-regulate the phospholipase C/inositol phosphate pathway. The second messengers of these pathways, cyclic AMP and calcium, play pivotal roles in airway epithelial cell primary functions of mucus clearance. Furthermore, the enzyme that synthesizes GABA, glutamic acid decarboxylase (GAD65/67), was also localized to airway epithelium. GABA may modulate an uncharacterized signaling cascade via GABA(B) receptors coupled to G(i) protein in airway epithelium.
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Affiliation(s)
- Kentaro Mizuta
- Department of Anesthesiology, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA
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IL-17 producing gammadelta T cells are required for a controlled inflammatory response after bleomycin-induced lung injury. Inflammation 2008; 31:167-79. [PMID: 18338242 DOI: 10.1007/s10753-008-9062-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Accepted: 02/04/2008] [Indexed: 10/22/2022]
Abstract
BACKGROUND gammadelta T cells play a key role in the regulation of inflammatory responses in epithelial tissue, and in adaptive immunity, as gammadelta T cell deficient mice have a severely impaired capacity to clear lung pathogens. gammadelta T cells regulate the initial inflammatory response to microbial invasion and thereby protect against tissue injury. Here we examined the response of gammadelta T cells to lung injury induced by bleomycin, in an effort to study the inflammatory response in the absence of any adaptive immune response to a pathogen. RESULTS After lung injury by bleomycin, we localized the gammadelta T cells to the lung lesions. gammadelta T cells were the predominant source of IL-17 (as detected by flow cytometry and real-time PCR). Moreover, gammadelta T cell knockout mice showed a significant reduction in cellular infiltration into the airways, reduced expression of IL-6 in the lung, and a significant delay in epithelial repair. CONCLUSION Mouse gammadelta T cells produce IL-17 in response to lung injury and are required for an organized inflammatory response and epithelial repair. The lack of gammadelta T cells correlates with increased inflammation and fibrosis.
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Hirata T, Osuga Y, Hamasaki K, Yoshino O, Ito M, Hasegawa A, Takemura Y, Hirota Y, Nose E, Morimoto C, Harada M, Koga K, Tajima T, Saito S, Yano T, Taketani Y. Interleukin (IL)-17A stimulates IL-8 secretion, cyclooxygensase-2 expression, and cell proliferation of endometriotic stromal cells. Endocrinology 2008; 149:1260-7. [PMID: 18079209 DOI: 10.1210/en.2007-0749] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-17A is secreted from Th17 cells, a discovery leading to revision of the mechanism underlying the role of Th1/Th2 in the immune response. Strong evidence suggests that immune responses associated with inflammation are involved in the pathogenesis of endometriosis. In the present study, we first demonstrated that the presence of Th17 cells in peritoneal fluid of endometriotic women by flow cytometric analysis and IL-17A-positive cells in endometriotic tissues by immunohistochemistry. To investigate the role of IL-17A in the development of endometriosis, we then studied the effect of IL-17A on IL-8 production, cyclooxygensase-2 expression, and cell proliferation of cultured endometriotic stromal cells (ESCs). IL-17A enhanced IL-8 secretion from ESCs in a dose-dependent manner. The IL-17A-induced secretion of IL-8 from ESCs was suppressed by anti-IL-17 receptor A antibodies or inhibitors of p38 MAPK, p42/44 MAPK, and stress-activated protein kinase/c-Jun N-terminal kinase. Addition of TNFalpha synergistically increased IL-17A-induced IL-8 secretion from ESCs. IL-17A also enhanced the expression of cyclooxygensase-2 mRNA and proliferation of ESCs. IL-17A may play a role in the development of endometriosis by stimulating inflammatory responses and proliferation of ESCs.
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Affiliation(s)
- Tetsuya Hirata
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Li X. Act1 modulates autoimmunity through its dual functions in CD40L/BAFF and IL-17 signaling. Cytokine 2007; 41:105-13. [PMID: 18061473 DOI: 10.1016/j.cyto.2007.09.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Accepted: 09/21/2007] [Indexed: 01/23/2023]
Abstract
Coordinated regulation of T and B cell-mediated immune responses plays a critical role in the control and modulation of autoimmune diseases. This review is focused on the adapter molecule Act1 and its regulation of autoimmunity through its impact on both T and B cell-mediated immune responses. Whereas Act1 molecule is an important negative regulator for B cell-mediated humoral immune responses through its function in CD40L and BAFF signaling, recent studies have shown that Act1 is also a key positive signaling component for IL-17 signaling pathway, critical for T(H)17-mediated autoimmune and inflammatory responses. The dual functions of Act1 are evident in Act1-deficient mice that displayed B cell-mediated autoimmune phenotypes (including dramatic increase in peripheral B cells, lymphadenopathy and splenomegaly, hypergammaglobulinemia and Sjogren's disease in association with Lupus Nephritis), but showed resistance to T(H)17-dependent EAE and colitis. Such seemingly opposite functions of Act1 in CD40-BAFFR and IL-17R signaling are orchestrated by different domains in Act1. Whereas Act1 interacts with the IL-17R through the C-terminal SEFIR domain, Act1 is recruited to CD40 and BAFFR indirectly, which is mediated by TRAF3 through the TRAF binding site in Act1. Such delicate regulatory mechanisms may provide a common vehicle to promote balance between host defense to pathogens and tolerance to self.
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Affiliation(s)
- Xiaoxia Li
- Department of Immunology, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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Qian Y, Liu C, Hartupee J, Altuntas CZ, Gulen MF, Jane-Wit D, Xiao J, Lu Y, Giltiay N, Liu J, Kordula T, Zhang QW, Vallance B, Swaidani S, Aronica M, Tuohy VK, Hamilton T, Li X. The adaptor Act1 is required for interleukin 17-dependent signaling associated with autoimmune and inflammatory disease. Nat Immunol 2007; 8:247-56. [PMID: 17277779 DOI: 10.1038/ni1439] [Citation(s) in RCA: 441] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Accepted: 01/11/2007] [Indexed: 01/07/2023]
Abstract
T helper cells that produce interleukin 17 (IL-17) are associated with inflammation and the control of certain bacteria. We report here the essential involvement of the adaptor protein Act1 in IL-17 receptor (IL-17R) signaling and IL-17-dependent immune responses. After stimulation with IL-17, recruitment of Act1 to IL-17R required the IL-17R conserved cytoplasmic 'SEFIR' domain, followed by recruitment of the kinase TAK1 and E3 ubiquitin ligase TRAF6, which mediate 'downstream' activation of transcription factor NF-kappaB. IL-17-induced expression of inflammation-related genes was abolished in Act1-deficient primary astroglial and gut epithelial cells. This reduction was associated with much less inflammatory disease in vivo in both autoimmune encephalomyelitis and dextran sodium sulfate-induced colitis. Our data show that Act1 is essential in IL-17-dependent signaling in autoimmune and inflammatory disease.
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MESH Headings
- Adaptor Proteins, Signal Transducing/immunology
- Adaptor Proteins, Signal Transducing/metabolism
- Adoptive Transfer
- Animals
- Autoimmune Diseases
- Autoimmunity
- B-Cell Activation Factor Receptor/immunology
- B-Cell Activation Factor Receptor/metabolism
- CD40 Antigens/immunology
- CD40 Antigens/metabolism
- Colitis/immunology
- Colitis/metabolism
- Colitis/pathology
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Enzyme-Linked Immunosorbent Assay
- Female
- Fluorescent Antibody Technique
- Gene Expression
- Gene Expression Regulation/immunology
- HeLa Cells
- Humans
- Inflammation/immunology
- Interleukin-17/immunology
- Interleukin-17/metabolism
- Mice
- Receptors, Interleukin-17/immunology
- Receptors, Interleukin-17/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction/immunology
- T-Lymphocytes/immunology
- Transfection
- Tumor Necrosis Factor Receptor-Associated Peptides and Proteins
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Affiliation(s)
- Youcun Qian
- Department of Immunology, Cleveland Clinic, Cleveland, Ohio 44195, USA
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Witowski J, Ksiazek K, Warnecke C, Kuźlan M, Korybalska K, Tayama H, Wiśniewska-Elnur J, Pawlaczyk K, Trómińska J, Breborowicz A, Jörres A. Role of mesothelial cell-derived granulocyte colony-stimulating factor in interleukin-17-induced neutrophil accumulation in the peritoneum. Kidney Int 2007; 71:514-25. [PMID: 17228364 DOI: 10.1038/sj.ki.5002082] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent studies suggest that peritoneal CD4(+) T lymphocytes may control recruitment of polymorphonuclear leukocytes (PMN) during peritonitis by an interleukin-17 (IL-17)-dependent mechanism. IL-17 and granulocyte colony-stimulating factor (G-CSF) have been proposed to form an axis that regulates PMN transmigration. Here we report on the role of G-CSF released by human peritoneal mesothelial cells (HPMCs) in IL-17A-mediated peritoneal PMN accumulation. In vitro exposure of HPMCs to IL-17A resulted in a time- and dose-dependent release of G-CSF. This effect was related to the induction of G-CSF mRNA and mediated through the nuclear factor-kappaB (NF-kappaB) pathway. The novel observation was that IL-17A-stimulated NF-kappaB activation in HPMCs followed a biphasic profile, with an early induction (45 min), followed by the return to basal levels (90 min), and a delayed induction (3 h). Tumor necrosis factor alpha synergistically amplified IL-17A-induced G-CSF production by enhanced NF-kappaB activation and through stabilization of G-CSF mRNA. Intraperitoneal (i.p.) administration of IL-17A in Balb/c mice resulted in increased local levels of G-CSF and selective PMN accumulation. Administration of anti-G-CSF blocking antibody before IL-17A injection significantly reduced the IL-17A-triggered PMN infiltration. This effect occurred despite increased i.p. levels of PMN-specific chemokines KC and macrophage inflammatory protein-2 seen in animals treated with anti-G-CSF antibody. These data demonstrate that the mesothelium-derived G-CSF plays an important role in IL-17A-induced PMN recruitment into the peritoneum.
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Affiliation(s)
- J Witowski
- Department of Pathophysiology, University Medical School, Poznan, Poland
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