51
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Hastrup N, Khalilieh S, Dale DC, Hanson LG, Magnusson P, Tzontcheva A, Tseng J, Huyck S, Rosenberg E, Krogsgaard K. The effects of the CXCR2 antagonist, MK-7123, on bone marrow functions in healthy subjects. Cytokine 2015; 72:197-203. [DOI: 10.1016/j.cyto.2015.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 12/18/2014] [Accepted: 01/05/2015] [Indexed: 12/29/2022]
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Schilter HC, Collison A, Russo RC, Foot JS, Yow TT, Vieira AT, Tavares LD, Mattes J, Teixeira MM, Jarolimek W. Effects of an anti-inflammatory VAP-1/SSAO inhibitor, PXS-4728A, on pulmonary neutrophil migration. Respir Res 2015; 16:42. [PMID: 25889951 PMCID: PMC4389443 DOI: 10.1186/s12931-015-0200-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 02/27/2015] [Indexed: 12/13/2022] Open
Abstract
Background and purpose The persistent influx of neutrophils into the lung and subsequent tissue damage are characteristics of COPD, cystic fibrosis and acute lung inflammation. VAP-1/SSAO is an endothelial bound adhesion molecule with amine oxidase activity that is reported to be involved in neutrophil egress from the microvasculature during inflammation. This study explored the role of VAP-1/SSAO in neutrophilic lung mediated diseases and examined the therapeutic potential of the selective inhibitor PXS-4728A. Methods Mice treated with PXS-4728A underwent intra-vital microscopy visualization of the cremaster muscle upon CXCL1/KC stimulation. LPS inflammation, Klebsiella pneumoniae infection, cecal ligation and puncture as well as rhinovirus exacerbated asthma models were also assessed using PXS-4728A. Results Selective VAP-1/SSAO inhibition by PXS-4728A diminished leukocyte rolling and adherence induced by CXCL1/KC. Inhibition of VAP-1/SSAO also dampened the migration of neutrophils to the lungs in response to LPS, Klebsiella pneumoniae lung infection and CLP induced sepsis; whilst still allowing for normal neutrophil defense function, resulting in increased survival. The functional effects of this inhibition were demonstrated in the RV exacerbated asthma model, with a reduction in cellular infiltrate correlating with a reduction in airways hyperractivity. Conclusions and implications This study demonstrates that the endothelial cell ligand VAP-1/SSAO contributes to the migration of neutrophils during acute lung inflammation, pulmonary infection and airway hyperractivity. These results highlight the potential of inhibiting of VAP-1/SSAO enzymatic function, by PXS-4728A, as a novel therapeutic approach in lung diseases that are characterized by neutrophilic pattern of inflammation.
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Affiliation(s)
- Heidi C Schilter
- Drug Discovery Department, Pharmaxis Ltd, 20 Rodborough Road, Frenchs Forest, Sydney, NSW, 2086, Australia.
| | - Adam Collison
- The University of Newcastle & Vaccines, Infection, Viruses & Asthma, Newcastle, Australia.
| | - Remo C Russo
- Laboratório de Imunologia e Mecânica Pulmonar, Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil. .,Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
| | - Jonathan S Foot
- Drug Discovery Department, Pharmaxis Ltd, 20 Rodborough Road, Frenchs Forest, Sydney, NSW, 2086, Australia.
| | - Tin T Yow
- Drug Discovery Department, Pharmaxis Ltd, 20 Rodborough Road, Frenchs Forest, Sydney, NSW, 2086, Australia.
| | - Angelica T Vieira
- Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
| | - Livia D Tavares
- Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
| | - Joerg Mattes
- The University of Newcastle & Vaccines, Infection, Viruses & Asthma, Newcastle, Australia.
| | - Mauro M Teixeira
- Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
| | - Wolfgang Jarolimek
- Drug Discovery Department, Pharmaxis Ltd, 20 Rodborough Road, Frenchs Forest, Sydney, NSW, 2086, Australia. .,School of Medical & Molecular Biosciences, University of Technology Sydney, City Campus, PO Box 123 Broadway, 2007, Sydney, NSW, Australia.
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Flavonoids from the aerial parts of Houttuynia cordata attenuate lung inflammation in mice. Arch Pharm Res 2015; 38:1304-11. [DOI: 10.1007/s12272-015-0585-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 02/27/2015] [Indexed: 10/23/2022]
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Rohde G, Message SD, Haas JJ, Kebadze T, Parker H, Laza-Stanca V, Khaitov MR, Kon OM, Stanciu LA, Mallia P, Edwards MR, Johnston SL. CXC chemokines and antimicrobial peptides in rhinovirus-induced experimental asthma exacerbations. Clin Exp Allergy 2015; 44:930-9. [PMID: 24673807 PMCID: PMC4403958 DOI: 10.1111/cea.12313] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 01/28/2014] [Accepted: 02/10/2014] [Indexed: 12/28/2022]
Abstract
RATIONALE Rhinoviruses (RVs) are the major triggers of asthma exacerbations. We have shown previously that lower respiratory tract symptoms, airflow obstruction, and neutrophilic airway inflammation were increased in experimental RV-induced asthma exacerbations. OBJECTIVES We hypothesized that neutrophil-related CXC chemokines and antimicrobial peptides are increased and related to clinical, virologic, and pathologic outcomes in RV-induced exacerbations of asthma. METHODS Protein levels of antimicrobial peptides (SLPI, HNP 1-3, elafin, and LL-37) and neutrophil chemokines (CXCL1/GRO-α, CXCL2/GRO-β, CXCL5/ENA-78, CXCL6/GCP-2, CXCL7/NAP-2, and CXCL8/IL-8) were determined in bronchoalveolar lavage (BAL) fluid of 10 asthmatics and 15 normal controls taken before, at day four during and 6 weeks post-experimental infection. RESULTS BAL HNP 1-3 and Elafin were higher, CXCL7/NAP-2 was lower in asthmatics compared with controls at day 4 (P = 0.035, P = 0.048, and P = 0.025, respectively). BAL HNP 1-3 and CXCL8/IL-8 were increased during infection (P = 0.003 and P = 0.011, respectively). There was a trend to increased BAL neutrophils at day 4 compared with baseline (P = 0.076). BAL HNP 1-3 was positively correlated with BAL neutrophil numbers at day 4. There were no correlations between clinical parameters and HNP1-3 or IL-8 levels. CONCLUSIONS We propose that RV infection in asthma leads to increased release of CXCL8/IL-8, attracting neutrophils into the airways where they release HNP 1-3, which further enhances airway neutrophilia. Strategies to inhibit CXCL8/IL-8 may be useful in treatment of virus-induced asthma exacerbations.
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Affiliation(s)
- G Rohde
- Department of Respiratory Medicine, National Heart and Lung Institute, MRC and Asthma UK Centre in Allergic Mechanisms of Asthma & Centre for Respiratory Infection, Imperial College London, London, UK; Department of Respiratory Medicine, Maastricht University Medical Centre+, Maastricht, The Netherlands
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Nicholls DJ, Wiley K, Dainty I, MacIntosh F, Phillips C, Gaw A, Mårdh CK. Pharmacological Characterization of AZD5069, a Slowly Reversible CXC Chemokine Receptor 2 Antagonist. J Pharmacol Exp Ther 2015; 353:340-50. [DOI: 10.1124/jpet.114.221358] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Tomankova T, Kriegova E, Liu M. Chemokine receptors and their therapeutic opportunities in diseased lung: far beyond leukocyte trafficking. Am J Physiol Lung Cell Mol Physiol 2015; 308:L603-18. [PMID: 25637606 DOI: 10.1152/ajplung.00203.2014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 01/28/2015] [Indexed: 12/13/2022] Open
Abstract
Chemokine receptors and their chemokine ligands, key mediators of inflammatory and immune cell trafficking, are involved in the regulation of both physiological and pathological processes in the lung. The discovery that chemokine receptors/chemokines, typically expressed by inflammatory and immune cells, are also expressed in structural lung tissue cells suggests their role in mediating the restoration of lung tissue structure and functions. Thus, chemokine receptors/chemokines contribute not only to inflammatory and immune responses in the lung but also play a critical role in the regulation of lung tissue repair, regeneration, and remodeling. This review aims to summarize current state-of-the-art on chemokine receptors and their ligands in lung diseases such as chronic obstructive pulmonary disease, asthma/allergy, pulmonary fibrosis, acute lung injury, and lung infection. Furthermore, the therapeutic opportunities of chemokine receptors in aforementioned lung diseases are discussed. The review also aims to delineate the potential contribution of chemokine receptors to the processes leading to repair/regeneration of the lung tissue.
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Affiliation(s)
- Tereza Tomankova
- Faculty of Medicine and Dentistry, Department of Immunology, Palacky University Olomouc, Czech Republic; Latner Thoracic Surgery Research Laboratories, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada; and
| | - Eva Kriegova
- Faculty of Medicine and Dentistry, Department of Immunology, Palacky University Olomouc, Czech Republic
| | - Mingyao Liu
- Latner Thoracic Surgery Research Laboratories, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada; and Faculty of Medicine, Departments of Physiology, Surgery, and Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
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Sharp C, Millar AB, Medford ARL. Advances in understanding of the pathogenesis of acute respiratory distress syndrome. Respiration 2015; 89:420-34. [PMID: 25925331 DOI: 10.1159/000381102] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 02/12/2015] [Indexed: 02/05/2023] Open
Abstract
The clinical syndrome of acute lung injury (ALI) occurs as a result of an initial acute systemic inflammatory response. This can be consequent to a plethora of insults, either direct to the lung or indirect. The insult results in increased epithelial permeability, leading to alveolar flooding with a protein-rich oedema fluid. The resulting loss of gas exchange leads to acute respiratory failure and typically catastrophic illness, termed acute respiratory distress syndrome (ARDS), requiring ventilatory and critical care support. There remains a significant disease burden, with some estimates showing 200,000 cases each year in the USA with a mortality approaching 50%. In addition, there is a significant burden of morbidity in survivors. There are currently no disease-modifying therapies available, and the most effective advances in caring for these patients have been in changes to ventilator strategy as a result of the ARDS network studies nearly 15 years ago. Here, we will give an overview of more recent advances in the understanding of the cellular biology of ALI and highlight areas that may prove fertile for future disease-modifying therapies.
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Affiliation(s)
- Charles Sharp
- Academic Respiratory Unit, University of Bristol, Southmead Hospital, Westbury-on-Trym, UK
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58
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Sisto M, Lisi S. New Insights Into ADAMs Regulation of the GRO-α/CXCR2 System: Focus on Sjögren's Syndrome. Int Rev Immunol 2014; 34:486-99. [DOI: 10.3109/08830185.2014.975892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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59
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Ha H, Bensman T, Ho H, Beringer PM, Neamati N. A novel phenylcyclohex-1-enecarbothioamide derivative inhibits CXCL8-mediated chemotaxis through selective regulation of CXCR2-mediated signalling. Br J Pharmacol 2014; 171:1551-65. [PMID: 24354854 DOI: 10.1111/bph.12547] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 11/26/2013] [Accepted: 12/02/2013] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE Since the CXC chemokine receptor CXCR2 and its cognate ligand CXCL8 (IL-8) critically regulate neutrophil trafficking during inflammation, they have been implicated in a number of inflammatory lung diseases. Several CXCR2 antagonists have been described and the blockade of CXCR2 has shown promise in pre-clinical disease models and early clinical trials. However, given its potential, there are fewer distinct classes of antagonists of CXCR2 than of other clinically relevant molecular targets. Thus, we sought to identify additional classes of compounds that alter CXCR2 function. EXPERIMENTAL APPROACH We used the CXCR2 Tango(TM) assay to screen an in-house library of highly diverse chemical compounds. CX4338 [2-(benzylamino)-4,4-dimethyl-6-oxo-N-phenylcyclohex-1-enecarbothioamide] was identified from our screen and additional studies to characterize the compound were performed. Receptor internalization and second-messenger assays were used to assess the effects of CX4338 on CXCR2-mediated signalling. Wound healing, transwell cell migration and LPS-induced lung inflammation in mice were used to determine the in vitro and in vivo effects of CX4338. KEY RESULTS CX4338 selectively inhibited CXCR2-mediated recruitment of β-arrestin-2 and receptor internalization, while enhancing CXCR2-mediated MAPK activation. Additionally, CX4338 inhibited CXCL8-induced chemotaxis in CXCR2-overexpressing cells and human neutrophils. In vivo, CX4338 significantly reduced neutrophils in bronchoalveolar lavage induced by LPS in mice. CONCLUSIONS AND IMPLICATIONS A novel compound CX4338 inhibited CXCR2-mediated cell migration with a mechanism of action not previously reported. Also, selective inhibition of CXCR2-mediated β-arrestin-2 activation is sufficient to inhibit CXCL8-mediated chemotaxis.
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Affiliation(s)
- Helen Ha
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, USA
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60
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A role for Rab27 in neutrophil chemotaxis and lung recruitment. BMC Cell Biol 2014; 15:39. [PMID: 25359237 PMCID: PMC4221698 DOI: 10.1186/s12860-014-0039-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 10/16/2014] [Indexed: 01/08/2023] Open
Abstract
Background Neutrophils are a critical part of the innate immune system. Their ability to migrate into infected or injured tissues precedes their role in microbial killing and clearance. We have previously shown that Rab27a can promote neutrophil migration by facilitating uropod release through protease secretion from primary granule exocytosis at the cell rear. Rab27b has been implicated in primary granule exocytosis but its role in neutrophil migration has not been investigated. Results Here we found Rab27b to be expressed in bone marrow derived neutrophils and Rab27b knockout (Rab27b KO) along with Rab27a/b double knockout (Rab27DKO) neutrophils exhibited impaired transwell migration in vitro in response to chemokines MIP-2 and LTB4. Interestingly, no additional defect in migration was observed in Rab27DKO neutrophils compared with Rab27b KO neutrophils. In vivo, Rab27DKO mice displayed severe impairment in neutrophil recruitment to the lungs in a MIP-2 dependent model but not in an LPS dependent model. Conclusions These data taken together implicate Rab27b in the regulation of neutrophil chemotaxis, likely through the regulation of primary granule exocytosis.
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Lu H, Yang T, Xu Z, Wren PB, Zhang Y, Cai X, Patel M, Dong K, Zhang Q, Zhang W, Guan X, Xiang J, Elliott JD, Lin X, Ren F. 2-Aminopyrimidin-4(1H)-one as the novel bioisostere of urea: discovery of novel and potent CXCR2 antagonists. Bioorg Med Chem Lett 2014; 24:5493-6. [PMID: 25455491 DOI: 10.1016/j.bmcl.2014.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 09/27/2014] [Accepted: 10/01/2014] [Indexed: 02/02/2023]
Abstract
2-Aminopyrimidin-4(1H)-one was proposed as the novel bioisostere of urea. Bioisosteric replacement of the reported urea series of the CXCR2 antagonists with 2-aminopyrimidin-4(1H)-ones led to the discovery of the novel and potent CXCR2 antagonist 3e. 2-Aminopyrimidin-4(1H)-one derivative 3e demonstrated a good developability profile (reasonable solubility and high permeability) and superior chemical stability especially in simulated gastric fluid (SGF) compared with ureas.
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Affiliation(s)
- Hongfu Lu
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Ting Yang
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Zhongmiao Xu
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Paul B Wren
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Yueting Zhang
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Xin Cai
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Metul Patel
- GlaxoSmithKline, Platform Technology & Science, Biological Sciences, Gunnels Wood Road, Stevenage, Herts SG1 2NY, UK
| | - Kelly Dong
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Qing Zhang
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Wei Zhang
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Xiaoming Guan
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Jianing Xiang
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - John D Elliott
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Xichen Lin
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China
| | - Feng Ren
- Research and Development, GlaxoSmithKline, 898 Halei Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, PR China.
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Michlmayr D, Lim JK. Chemokine receptors as important regulators of pathogenesis during arboviral encephalitis. Front Cell Neurosci 2014; 8:264. [PMID: 25324719 PMCID: PMC4179766 DOI: 10.3389/fncel.2014.00264] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 08/17/2014] [Indexed: 12/24/2022] Open
Abstract
The central nervous system (CNS) is a highly complex network comprising long-lived neurons and glial cells. Accordingly, numerous mechanisms have evolved to tightly regulate the initiation of inflammatory responses within the brain. Under neuroinflammatory conditions, as in the case of viral encephalitides, the infiltration of leukocytes is often required for efficient viral clearance and recovery. The orchestration of leukocyte migration into the inflamed CNS is largely coordinated by a large family of chemotactic cytokines and their receptors. In this review, we will summarize our current understanding of how chemokines promote protection or pathogenesis during arbovirus induced encephalitis, focusing on neurotropic flaviviruses and alphaviruses. Furthermore, we will highlight the latest developments in chemokine and chemokine receptor based drugs that could have potential as therapeutics and have been shown to play a pivotal role in shaping the outcome of disease.
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Affiliation(s)
- Daniela Michlmayr
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Jean K Lim
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY USA
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Lim HJ, Lee JH, Choi JS, Lee SK, Kim YS, Kim HP. Inhibition of airway inflammation by the roots of Angelica decursiva and its constituent, columbianadin. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:1353-1361. [PMID: 25068578 DOI: 10.1016/j.jep.2014.07.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/09/2014] [Accepted: 07/16/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The roots of Angelica decursiva Fr. Et Sav (Umbelliferae) have been frequently used in traditional medicine as anti-inflammatory, antitussive, analgesic agents and expectorant, especially for treating cough, asthma, bronchitis and upper respiratory tract infections. To establish the scientific rationale for the clinical use of Angelica decursiva and to identify new agents for treating inflammatory lung disorders, pharmacological evaluation of the roots of Angelica decursiva and the isolated constituents was performed. METHODS In vitro study was carried out using two lung cells, lung epithelial cells (A549) and alveolar macrophages (MH-S). The inflammatory markers such as IL-6 and nitric oxide (NO) for each cell line were examined. For in vivo study, a mouse model of lipopolysaccharide (LPS)-induced acute lung injury was used and the effects on lung inflammation were established by measuring the cell numbers in bronchoalveolar lavage fluid (BALF) and by histological observation. RESULTS Water and 70% ethanol extracts of the roots of Angelica decursiva showed considerable inhibitory activity against LPS-induced lung inflammation in mice following oral administration at a dose of 400 mg/kg. Five coumarin derivatives including columbianadin, umbelliferone, umbelliferone 6-carboxylic acid, nodakenin and nodakenetin were isolated. Among the isolated compounds, columbianadin was found to possess strong inhibitory activity against the inflammatory response of IL-1β-treated A549 cells and LPS-treated MH-S cells. Columbianadin was found to inhibit NO production by down-regulation of inducible NO synthase. Moreover, columbianadin was also proved to possess significant inhibitory activity against LPS-induced lung inflammation following oral administration at a dose of 20-60 mg/kg. CONCLUSIONS The roots of Angelica decursiva were proved to be effective in the treatment of lung inflammation. Columbianadin can be a potential new agent for treating inflammatory lung disorders.
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Affiliation(s)
- Hun Jai Lim
- College of Pharmacy, Kangwon National University, Chunchon 200-701, Republic of Korea
| | - Ju Hee Lee
- College of Pharmacy, Kangwon National University, Chunchon 200-701, Republic of Korea
| | - Jae Sue Choi
- Department of Food Science and Nutrition, Pukyong National University, Busan 608-737, Republic of Korea
| | - Sang Kook Lee
- College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Yeong Shik Kim
- College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Hyun Pyo Kim
- College of Pharmacy, Kangwon National University, Chunchon 200-701, Republic of Korea.
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Russo RC, Garcia CC, Teixeira MM, Amaral FA. The CXCL8/IL-8 chemokine family and its receptors in inflammatory diseases. Expert Rev Clin Immunol 2014; 10:593-619. [DOI: 10.1586/1744666x.2014.894886] [Citation(s) in RCA: 317] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Boppana NB, Devarajan A, Gopal K, Barathan M, Bakar SA, Shankar EM, Ebrahim AS, Farooq SM. Blockade of CXCR2 signalling: A potential therapeutic target for preventing neutrophil-mediated inflammatory diseases. Exp Biol Med (Maywood) 2014; 239:509-18. [DOI: 10.1177/1535370213520110] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Polymorphonuclear neutrophils (PMN) play a key role in host innate immune responses by migrating to the sites of inflammation. Furthermore, PMN recruitment also plays a significant role in the pathophysiology of a plethora of inflammatory disorders such as chronic obstructive pulmonary disease (COPD), gram negative sepsis, inflammatory bowel disease (IBD), lung injury, and arthritis. Of note, chemokine-dependent signalling is implicated in the amplification of immune responses by virtue of its role in PMN chemotaxis in most of the inflammatory diseases. It has been clinically established that impediment of PMN recruitment ameliorates disease severity and provides relief in majority of other immune-associated disorders. This review focuses on different novel approaches clinically proven to be effective in blocking chemokine signalling associated with PMN recruitment that includes CXCR2 antagonists, chemokine analogs, anti-CXCR2 monoclonal antibodies, and CXCR2 knock-out models. It also highlights the significance of the utility of nanoparticles in drugs used for blocking migration of PMN to the sites of inflammation.
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Affiliation(s)
- Nithin B Boppana
- Department of Pharmaceutical Sciences, Wayne State University, Detroit, MI 48201, USA
| | - Asokan Devarajan
- Division of Cardiology, Department of Medicine, University of California, Los Angeles, Westwood, CA 90095, USA
| | - Kaliappan Gopal
- Department of Orthopedics, Faculty of Medicine, National Orthopedics Center for Excellence in Research and Learning (NOCERAL), University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia
| | - Muttiah Barathan
- Department of Medical Microbiology, Faculty of Medicine, Tropical Infectious Disease Research and Education Center (TIDREC), University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia
| | - Sazaly A Bakar
- Department of Medical Microbiology, Faculty of Medicine, Tropical Infectious Disease Research and Education Center (TIDREC), University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia
| | - Esaki M Shankar
- Department of Medical Microbiology, Faculty of Medicine, Tropical Infectious Disease Research and Education Center (TIDREC), University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia
| | - Abdul S Ebrahim
- Department of Internal Medicine, Wayne State University, Detroit, MI 48201, USA
| | - Shukkur M Farooq
- Department of Pharmacy Practice, Wayne State University, Detroit, MI 48201, USA
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Liu M, Chen K, Yoshimura T, Liu Y, Gong W, Le Y, Gao JL, Zhao J, Wang JM, Wang A. Formylpeptide receptors mediate rapid neutrophil mobilization to accelerate wound healing. PLoS One 2014; 9:e90613. [PMID: 24603667 PMCID: PMC3946181 DOI: 10.1371/journal.pone.0090613] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 02/02/2014] [Indexed: 12/19/2022] Open
Abstract
Wound healing is a multi-phased pathophysiological process requiring chemoattractant receptor-dependent accumulation of myeloid cells in the lesion. Two G protein-coupled formylpeptide receptors Fpr1 and Fpr2 mediate rapid neutrophil infiltration in the liver of Listeria-infected mice by sensing pathogen-derived chemotactic ligands. These receptors also recognize host-derived chemotactic peptides in inflammation and injury. Here we report the capacity of Fprs to promote the healing of sterile skin wound in mice by initiating neutrophil infiltration. We found that in normal miceneutrophils rapidly infiltrated the dermis in the wound before the production of neutrophil-specific chemokines by the injured tissue. In contrast, rapid neutrophil infiltration was markedly reduced with delayed wound closure in mice deficient in both Fprs. In addition, we detected Fpr ligand activity that chemoattracted neutrophils into the wound tissue. Our study thus demonstrates that Fprs are critical for normal healing of the sterile skin wound by mediating the first wave of neutrophil infiltration.
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Affiliation(s)
- Mingyong Liu
- Department of Spine Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, United States of America
| | - Keqiang Chen
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, United States of America
| | - Teizo Yoshimura
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, United States of America
| | - Ying Liu
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, United States of America
- National Center For Nanoscience and Technology, Beijing, China
| | - Wanghua Gong
- Basic Research Program, Science Applications International Corporation-Frederick, Frederick, Maryland, United States of America
| | - Yingying Le
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Ji-Liang Gao
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Jianhua Zhao
- Department of Spine Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Ji Ming Wang
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, United States of America
| | - Aimin Wang
- The Center for Orthopedics, Daping Hospital, Third Military Medical University, Chongqing, China
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Lim HJ, Woo KW, Lee KR, Lee SK, Kim HP. Inhibition of Proinflammatory Cytokine Generation in Lung Inflammation by the Leaves of Perilla frutescens and Its Constituents. Biomol Ther (Seoul) 2014; 22:62-7. [PMID: 24596623 PMCID: PMC3936423 DOI: 10.4062/biomolther.2013.088] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 12/11/2013] [Accepted: 12/16/2013] [Indexed: 11/30/2022] Open
Abstract
This study was designed to find some potential natural products and/or constituents inhibiting proinflammatory cytokine generation in lung inflammation, since cytokines such as tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) are pivotal for provoking airway inflammation. In our preliminary screening procedure, the 70% ethanol extract of the leaves of Perilla frutescens (PFE) was found to clearly inhibit TNF-α production in the lung at 100 mg/kg, after intranasal lipopolysaccharide treatment of mice. Based on this result, ten constituents including phenylpropanoids (allyltetramethoxybenzene, caffeic acid, dillapiole, elemicin, myristicin, nothoapiole, rosmarinic acid methyl ester, rosmarinic acid) and monoterpenes (perilla aldehyde and perilla ketone) were successfully isolated from the extract. Among them, elemicin and myristicin were found for the first time to concentration-dependently inhibit IL-1β-treated IL-6 production from lung alveolar epithelial cells (A549) at concentrations of 10-100 μM. These findings suggest that the phenylpropanoids including elemicin and myristicin have the potential to be new inhibitory agents against lung inflammation and they may contribute, at least in part, to the inhibitory activity of PFE on the lung inflammatory response.
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Affiliation(s)
- Hun Jai Lim
- College of Pharmacy, Kangwon National University, Chunchon 200-701
| | - Kyeong Wan Woo
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746
| | - Kang Ro Lee
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746
| | - Sang Kook Lee
- College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Hyun Pyo Kim
- College of Pharmacy, Kangwon National University, Chunchon 200-701
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Abstract
INTRODUCTION Small-molecule antagonists of CXC chemokine receptor 2 (CXCR2) have attracted a considerable amount of attention due to the key central role that this receptor plays in inflammatory conditions. Recently, several CXCR2 receptor antagonists have demonstrated promising proof of activity in early pulmonary clinical trials, which has stimulated additional efforts to identify new CXCR2 receptor antagonists. AREAS COVERED During the period 2009 - 2013, there were numerous patent publications from various companies claiming the discovery of novel CXCR2 receptor antagonists. Herein, an interpretation of these new patent publications combined with emerging disclosures from the peer-reviewed literature during this time frame is given. This review highlights the preferred or representative compounds from the patent applications along with relevant biological characterization. EXPERT OPINION Many of the new CXCR2 receptor antagonists described in this review represent closely related analogs to previously disclosed clinical candidates. With the recent discontinuation of several CXCR2 receptor antagonists in the clinic, additional clinical trial information for CXCR2 receptor antagonists, both past and present, will determine the long-term therapeutic potential of these compounds for the treatment of a variety of inflammatory disorders.
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Affiliation(s)
- Michael P Dwyer
- Department of Medicinal Chemistry, Merck Research Laboratories , 126 E. Lincoln Ave, RY800-D101, Rahway, NJ 07065-0900 , USA +1 732 594 1733 ; +1 732 594 9490 ;
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Lee YS, Choi D, Kim NY, Yang S, Jung E, Hong M, Yang D, Lenz HJ, Hong YK. CXCR2 inhibition enhances sulindac-mediated suppression of colon cancer development. Int J Cancer 2014; 135:232-7. [PMID: 24338666 DOI: 10.1002/ijc.28668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 11/18/2013] [Accepted: 11/28/2013] [Indexed: 12/24/2022]
Abstract
Small chemical compound sulindac has been approved as a preventive approach against colon cancer for its effectiveness in treatment of precancerous adenoma. Due to its severe toxicities in the cardiovascular, gastrointestinal and renal systems, however, a combination of low-dose sulindac with other chemopreventive agents has been sought after as an alternative therapeutic strategy that could increase its effectiveness, while minimizing its adverse effects. To identify the promising alternative approach, we investigated the therapeutic potential of targeting the interleukin (IL)-8/CXCR2 pathway in colon cancer treatment using both loss-of-function (CXCR2 knockout) and gain-of-function (IL-8 overexpression) mouse models, as the IL-8/CXCR2 pathway has been shown to be activated in intestinal tumors of both human and experimental animals. We found that deletion of CXCR2 gene and ectopic expression of IL-8 suppresses and enhances, respectively, intestinal tumor development caused by a mutation in the APC gene. Moreover, a single copy deletion of CXCR2 gene resulted in abrogation of COX-2 and Gro-α upregulation in intestinal tumors caused by the APC mutation. Moreover, a single copy (heterozygote) deletion of CXCR2 gene was sufficient to synergize with a low-dose sulindac treatment in suppressing APCmin-induced intestinal polyposis. Together, our study provides a therapeutic justification of combined inhibition of CXCR2 and sulindac treatment in colon cancer prevention.
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Affiliation(s)
- Yong Suk Lee
- Department of Surgery, University of Southern California, Los Angeles, CA; Department of Biochemistry and Molecular Biology, University of Southern California, Los Angeles, CA; Department of Preventive Medicine, Division of Medical Oncology, University of Southern California, Los Angeles, CA
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Leaker BR, Barnes PJ, O'Connor B. Inhibition of LPS-induced airway neutrophilic inflammation in healthy volunteers with an oral CXCR2 antagonist. Respir Res 2013; 14:137. [PMID: 24341382 PMCID: PMC3867427 DOI: 10.1186/1465-9921-14-137] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 11/12/2013] [Indexed: 01/21/2023] Open
Abstract
Background Inhaled lipopolysaccharide (LPS) induces a dose-dependent, acute neutrophilic response in the airways of healthy volunteers that can be quantified in induced sputum. Chemokines, such as CXCL1 and CXCL8, play an important role in neutrophilic inflammation in the lung through the activation of CXCR2 and small molecule antagonists of these receptors have now been developed. We investigated the effect of AZD8309, a CXCR2 antagonist, compared with placebo on LPS-induced inflammation measured in sputum of healthy volunteers. Methods Twenty healthy subjects were randomized in a double-blind placebo-controlled, cross-over study. AZD8309 (300 mg) or placebo was dosed twice daily orally for 3 days prior to challenge with inhaled LPS and induced sputum was collected 6 h later. Results Treatment with AZD8309 showed a mean 77% reduction in total sputum cells (p < 0.001) and 79% reduction in sputum neutrophils (p < 0.05) compared with placebo after LPS challenge. There was also a reduction in neutrophil elastase activity (p < 0.05) and CXCL1 (p < 0.05) and trends for reductions in sputum macrophages (47%), leukotriene B4 (39%) and CXCL8 (52%). Conclusions AZD8309 inhibited LPS-induced inflammation measured in induced sputum of normal volunteers, indicating that this treatment may be useful in the treatment of neutrophilic diseases of the airways, such as COPD, severe asthma and cystic fibrosis. Trial registration NCT00860821.
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Affiliation(s)
- Brian R Leaker
- Respiratory Clinical Trials Ltd, 20 Queen Anne Street, London W1G 8HU, UK.
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71
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Williams AE, Chambers RC. The mercurial nature of neutrophils: still an enigma in ARDS? Am J Physiol Lung Cell Mol Physiol 2013; 306:L217-30. [PMID: 24318116 DOI: 10.1152/ajplung.00311.2013] [Citation(s) in RCA: 284] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The acute respiratory distress syndrome (ARDS) is a life-threatening lung condition resulting from direct and indirect insults to the lung. It is characterized by disruption of the endothelial-epithelial barrier, alveolar damage, pulmonary edema, and respiratory failure. A key feature of ARDS is the accumulation of neutrophils in the lung microvasculature, interstitium, and alveolar space. Despite a clear association between neutrophil influx into the lung and disease severity, there is some debate as to whether neutrophils directly contribute to disease pathogenesis. The primary function of neutrophils is to provide immediate host defense against pathogenic microorganisms. Neutrophils release numerous antimicrobial factors such as reactive oxygen species, proteinases, and neutrophil extracellular traps. However, these factors are also toxic to host cells and can result in bystander tissue damage. The excessive accumulation of neutrophils in ARDS may therefore contribute to disease progression. Central to neutrophil recruitment is the release of chemokines, including the archetypal neutrophil chemoattractant IL-8, from resident pulmonary cells. However, the chemokine network in the inflamed lung is complex and may involve several other chemokines, including CXCL10, CCL2, and CCL7. This review will therefore focus on the experimental and clinical evidence supporting neutrophils as key players in ARDS and the chemokines involved in recruiting them into the lung.
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Affiliation(s)
- Andrew E Williams
- Centre for Inflammation and Tissue Repair, Univ. College London, Rayne Institute, 5 Univ. St., London WC1E 6JF, UK.
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Seiberling M, Kamtchoua T, Stryszak P, Ma X, Langdon RB, Khalilieh S. Humoral immunity and delayed-type hypersensitivity in healthy subjects treated for 30days with MK-7123, a selective CXCR2 antagonist. Int Immunopharmacol 2013; 17:178-83. [DOI: 10.1016/j.intimp.2013.05.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 05/02/2013] [Accepted: 05/30/2013] [Indexed: 12/21/2022]
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Lim HJ, Jin HG, Woo ER, Lee SK, Kim HP. The root barks of Morus alba and the flavonoid constituents inhibit airway inflammation. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:169-175. [PMID: 23806866 DOI: 10.1016/j.jep.2013.06.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 06/03/2013] [Accepted: 06/05/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The root barks of Morus alba have been used in traditional medicine as an anti-inflammatory drug, especially for treating lung inflammatory disorders. AIM OF STUDY To find new alternative agents against airway inflammation and to establish the scientific rationale of the herbal medicine in clinical use, the root barks of Morus alba and its flavonoid constituents were examined for the first time for their pharmacological activity against lung inflammation. MATERIALS AND METHODS For in vivo evaluation, an animal model of lipopolysaccharide-induced airway inflammation in mice was used. An inhibitory action against the production of proinflammatory molecules in lung epithelial cells and lung macrophages was examined. RESULTS Against lipopolysaccharide-induced airway inflammation, the ethanol extract of the root barks of Morus alba clearly inhibited bronchitis-like symptoms, as determined by TNF-α production, inflammatory cells infiltration and histological observation at 200-400mg/kg/day by oral administration. In addition, Morus alba and their major flavonoid constituents including kuwanone E, kuwanone G and norartocarpanone significantly inhibited IL-6 production in lung epithelial cells (A549) and NO production in lung macrophages (MH-S). CONCLUSIONS Taken together, it is concluded that Morus alba and the major prenylated flavonoid constituents have a potential for new agents to control lung inflammation including bronchitis.
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Affiliation(s)
- Hun Jai Lim
- College of Pharmacy, Kangwon National University, Chunchon 200-701, South Korea
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Hertzer KM, Donald GW, Hines OJ. CXCR2: a target for pancreatic cancer treatment? Expert Opin Ther Targets 2013; 17:667-80. [PMID: 23425074 DOI: 10.1517/14728222.2013.772137] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Pancreatic cancer, a leading cause of cancer deaths worldwide, is very aggressive and has minimally effective treatment options. For those who have no surgical options, medical treatments are limited. The chemokine receptor CXCR2 has become the subject of much interest recently because of multiple studies indicating its involvement in cancer and inflammatory conditions. Research now indicates that CXCR2 and its ligands are intimately involved in tumor regulation and growth and that inhibition of its function shows promising results in multiple cancer types, including pancreatic cancer. AREAS COVERED In this study, the authors review basic molecular and structural details of CXCR2, as well as the known functions of CXCR2 and several of its ligands in inflammation and cancer biology with specific attention to pancreatic cancer. Then the future possibilities and questions remaining for pharmacological intervention against CXCR2 in pancreatic cancer are explored. EXPERT OPINION Many current inhibitory strategies already exist for targeting CXCR2 in vitro as well as in vivo. Clinically speaking, CXCR2 is an exciting potential target for pancreatic cancer; however, CXCR2 is functionally important for multiple processes and therapeutic options would benefit from further work toward understanding of these roles as well as structural and target specificity.
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Affiliation(s)
- Kathleen M Hertzer
- Hirshberg Translational Pancreatic Cancer Research Laboratory, David Geffen School of Medicine at UCLA, Department of Surgery , 675 Charles E Young Drive, MRL 2535, Los Angeles, CA 90095 , USA
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Norman P. Evaluation of WO2012080456 and WO2012080457; Boheringer Ingleheim's first CXCR2 antagonists. Expert Opin Ther Pat 2013; 23:383-8. [DOI: 10.1517/13543776.2013.754424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Liu M, Chen K, Yoshimura T, Liu Y, Gong W, Wang A, Gao JL, Murphy PM, Wang JM. Formylpeptide receptors are critical for rapid neutrophil mobilization in host defense against Listeria monocytogenes. Sci Rep 2012; 2:786. [PMID: 23139859 PMCID: PMC3493074 DOI: 10.1038/srep00786] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 09/27/2012] [Indexed: 12/11/2022] Open
Abstract
Listeria monocytogenes (Listeria) causes opportunistic infection in immunocompromised hosts with high mortality. Resistance to Listeria depends on immune responses and recruitment of neutrophils of the immune system into infected sites is an early and critical step. Mouse neutrophils express two G protein-coupled formylpeptide receptor subtypes Fpr1 and Fpr2 that recognize bacterial and host-derived chemotactic molecules including Listeria peptides for cell migration and activation. Here we report deficiency in Fprs exacerbated the severity of the infection and increased the mortality of infected mice. The mechanism involved impaired early neutrophil recruitment to the liver with Fpr1 and Fpr2 being sole receptors for neutrophils to sense Listeria chemoattractant signals and for production of bactericidal superoxide. Thus, Fprs are essential sentinels to guide the first wave of neutrophil infiltration in the liver of Listeria-infected mice for effective elimination of the invading pathogen.
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Affiliation(s)
- Mingyong Liu
- Department of Spine Surgery, Daping Hospital, Third Military Medical University, Chongqing 400042, China
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Fredrick, MD 21702, USA
| | - Keqiang Chen
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Fredrick, MD 21702, USA
| | - Teizo Yoshimura
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Fredrick, MD 21702, USA
| | - Ying Liu
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Fredrick, MD 21702, USA
| | - Wanghua Gong
- Basic Research Program, SAIC-Frederick, Frederick, MD 21702, USA
| | - Aimin Wang
- Center for Orthopedics, Daping Hospital, Third Military Medical University, Chongqing 400042, China
| | - Ji-Liang Gao
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Philip M. Murphy
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Ji Ming Wang
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Fredrick, MD 21702, USA
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Affiliation(s)
- James Pease
- Leukocyte Biology Section, National Heart and Lung Institute, Faculty of Medicine, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London SW7 2AZ, U.K
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Abstract
Leukocyte recruitment to sites of infection or tissue damage plays a crucial role for the innate immune response. Chemokine-dependent signaling in immune cells is a very important mechanism leading to integrin activation and leukocyte recruitment. CXC chemokine receptor 2 (CXCR2) is a prominent chemokine receptor on neutrophils. During the last years, several studies were performed investigating the role of CXCR2 in different diseases. Until now, many CXCR2 inhibitors are tested in animal models and clinical trials and promising results were obtained. This review gives an overview of the structure of CXCR2 and the signaling pathways that are activated following CXCR2 stimulation. We discuss in detail the role of this chemokine receptor in different disease models including acute lung injury, COPD, sepsis, and ischemia-reperfusion-injury. Furthermore, this review summarizes the results of clinical trials which used CXCR2 inhibitors.
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Affiliation(s)
- Anika Stadtmann
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Münster Münster, Germany
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79
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Lee YS, Choi I, Ning Y, Kim NY, Khatchadourian V, Yang D, Chung HK, Choi D, LaBonte MJ, Ladner RD, Nagulapalli Venkata KC, Rosenberg DO, Petasis NA, Lenz HJ, Hong YK. Interleukin-8 and its receptor CXCR2 in the tumour microenvironment promote colon cancer growth, progression and metastasis. Br J Cancer 2012; 106:1833-41. [PMID: 22617157 PMCID: PMC3364111 DOI: 10.1038/bjc.2012.177] [Citation(s) in RCA: 226] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is a leading cause of death in the United States. Increased level of interleukin-8 (IL-8) and CXCR2 on tumours and in the tumour microenvironment has been associated with CRC growth, progression and recurrence in patients. Here, we aimed to evaluate the effects of tissue microenvironment-encoded IL-8 and CXCR2 on colon cancer progression and metastasis. METHODS A novel immunodeficient, skin-specific IL-8-expressing transgenic model was generated to evaluate colon cancer growth and metastasis. Syngeneic mouse colon cancer cells were grafted in CXCR2 knockout (KO) mice to study the contribution of CXCR2 in the microenvironment to cancer growth. RESULTS Elevated levels of IL-8 in the serum and tumour microenvironment profoundly enhanced the growth of human and mouse colon cancer cells with increased peri-tumoural angiogenesis, and also promoted the extravasation of the cancer cells into the lung and liver. The tumour growth was inhibited in CXCR2 KO mice with significantly reduced tumour angiogenesis and increased tumour necrosis. CONCLUSION Increased expression of IL-8 in the tumour microenvironment enhanced colon cancer growth and metastasis. Moreover, the absence of its receptor CXCR2 in the tumour microenvironment prevented colon cancer cell growth. Together, our study demonstrates the critical roles of the tumour microenvironment-encoded IL-8/CXCR2 in colon cancer pathogenesis, validating the pathway as an important therapeutic target.
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Affiliation(s)
- Y S Lee
- Department of Surgery, Biochemistry and Molecular Biology, University of Southern California, 1450 Biggy Street NRT6501, Los Angeles, CA 90033, USA
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Nair P, Gaga M, Zervas E, Alagha K, Hargreave FE, O'Byrne PM, Stryszak P, Gann L, Sadeh J, Chanez P. Safety and efficacy of a CXCR2 antagonist in patients with severe asthma and sputum neutrophils: a randomized, placebo-controlled clinical trial. Clin Exp Allergy 2012; 42:1097-103. [DOI: 10.1111/j.1365-2222.2012.04014.x] [Citation(s) in RCA: 255] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- P. Nair
- Firestone Institute for Respiratory Health; St. Joseph's Healthcare & Department of Medicine; McMaster University; Hamilton; Ontario; Canada
| | - M. Gaga
- 7th Respiratory Medicine Department and Asthma Centre; Athens Chest Hospital; Greece
| | - E. Zervas
- 7th Respiratory Medicine Department and Asthma Centre; Athens Chest Hospital; Greece
| | - K. Alagha
- Département des Maladies Respiratoires; AP-HM, Laboratoire d'immunologie INSERM CNRS U 600; UMR6212; Université de la Méditerranée; Marseille; France
| | - F. E. Hargreave
- Firestone Institute for Respiratory Health; St. Joseph's Healthcare & Department of Medicine; McMaster University; Hamilton; Ontario; Canada
| | - P. M. O'Byrne
- Firestone Institute for Respiratory Health; St. Joseph's Healthcare & Department of Medicine; McMaster University; Hamilton; Ontario; Canada
| | - P. Stryszak
- Merck Research Laboratories; Kenilworth; NJ; USA
| | - L. Gann
- Merck Research Laboratories; Kenilworth; NJ; USA
| | - J. Sadeh
- Merck Research Laboratories; Kenilworth; NJ; USA
| | - P. Chanez
- Département des Maladies Respiratoires; AP-HM, Laboratoire d'immunologie INSERM CNRS U 600; UMR6212; Université de la Méditerranée; Marseille; France
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CXCR2 in acute lung injury. Mediators Inflamm 2012; 2012:740987. [PMID: 22719179 PMCID: PMC3375097 DOI: 10.1155/2012/740987] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 04/18/2012] [Accepted: 04/18/2012] [Indexed: 01/13/2023] Open
Abstract
In pulmonary inflammation, recruitment of circulating polymorphonuclear leukocytes is essential for host defense and initiates the following specific immune response. One pathological hallmark of acute lung injury and acute respiratory distress syndrome is the uncontrolled transmigration of neutrophils into the lung interstitium and alveolar space. Thereby, the extravasation of leukocytes from the vascular system into the tissue is induced by chemokines that are released from the site of inflammation. The most relevant chemokine receptors of neutrophils are CXC chemokine receptor (CXCR) 1 and CXCR2. CXCR2 is of particular interest since several studies implicate a pivotal role of this receptor in development and promotion of numerous inflammatory disorders. CXCR2 gets activated by ELR(+) chemokines, including MIP-2, KC (rodents) and IL-8 (human). Since multiple ELR(+) CXC chemokines act on both receptors--CXCR1 and CXCR2--a pharmacologic agent blocking both receptors seems to be advantageous. So far, several CXCR1/2 antagonists have been developed and have been tested successfully in experimental studies. A newly designed CXCR1 and CXCR2 antagonist can be orally administered and was for the first time found efficient in humans. This review highlights the role of CXCR2 in acute lung injury and discusses its potential as a therapeutic target.
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Macrophages are related to goblet cell hyperplasia and induce MUC5B but not MUC5AC in human bronchus epithelial cells. J Transl Med 2012; 92:937-48. [PMID: 22391959 DOI: 10.1038/labinvest.2012.15] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Airway goblet cell hyperplasia (GCH)--detectable by mucin staining--and abnormal macrophage infiltrate are pathological features present in many chronic respiratory disorders. However, it is unknown if both factors are associated. Using in-vivo and in-vitro models, we investigated whether macrophages are related with GCH and changes in mucin immunophenotypes. Lung sections from Sprague-Dawley rats treated for 48 h with one intra-tracheal dose of PBS or LPS (n=4-6 per group) were immunophenotyped for rat-goblet cells, immune, and proliferation markers. Human monocyte-derived macrophages (MDM) were pre-treated with or without LPS, immunophenotyped, and their supernatant, as well as cytokines at levels equivalent to supernatant were used to challenge primary culture of normal human bronchus epithelial cells (HBEC) in air-liquid interface, followed by MUC5B and MUC5AC mucin immunostaining. An association between increased bronchiolar goblet cells and terminal-bronchiolar proliferative epithelial cells confirmed the presence of GCH in our LPS rat model, which was related with augmented bronchiolar CD68 macrophage infiltration. The in-vitro experiments have shown that MUC5AC phenotype was inhibited when HBEC were challenged with supernatant from MDM pre-treated with or without LPS. In contrast, TNF-α and interleukin-1β at levels equivalent to supernatant from LPS-treated MDM increased MUC5AC. MUC5B was induced by LPS, supernatant from LPS-treated MDM, a mix of cytokines including TNF-α and TNF-α alone at levels present in supernatant from LPS-treated MDM. We demonstrated that macrophages are related with bronchiolar GCH, and that they induced MUC5B and inhibited MUC5AC in HBEC, suggesting a role for them in the pathogenesis of airway MUC5B-related GCH.
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Matera MG, Calzetta L, Segreti A, Cazzola M. Emerging drugs for chronic obstructive pulmonary disease. Expert Opin Emerg Drugs 2012; 17:61-82. [DOI: 10.1517/14728214.2012.660917] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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de Kruijf P, Lim HD, Roumen L, Renjaän VA, Zhao J, Webb ML, Auld DS, Wijkmans JC, Zaman GJR, Smit MJ, de Graaf C, Leurs R. Identification of a Novel Allosteric Binding Site in the CXCR2 Chemokine Receptor. Mol Pharmacol 2011; 80:1108-18. [DOI: 10.1124/mol.111.073825] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Attenuation of leukocyte recruitment via CXCR1/2 inhibition stops the progression of PAH in mice with genetic ablation of endothelial BMPR-II. Blood 2011; 118:4750-8. [PMID: 21900197 DOI: 10.1182/blood-2011-05-347393] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Previous studies from our group have demonstrated that bone morphogenetic protein receptor-II (BMPR-II), expressed on pulmonary artery endothelial cells, imparts profound anti-inflammatory effects by regulating the release of proinflammatory cytokines and promoting barrier function by suppressing the transmigration of leukocytes into the pulmonary vessel wall. Here we demonstrate that, in mice with endothelial-specific loss of BMPR-II expression (L1Cre(+);Bmpr2(f/f)), reduction in barrier function and the resultant pulmonary hypertension observed in vivo are the result of increased leukocyte recruitment through increased CXCR1/2 signaling. Loss of endothelial expressed BMPR-II leads to elevated plasma levels of a wide range of soluble mediators important in regulating leukocyte migration and extravasation, including the CXCR1/2 ligand, KC. Treatment of L1Cre(+);Bmpr2(f/f) mice with the CXCR1/2 antagonist SCH527123 inhibits leukocyte transmigration into lung and subsequently reverses the pulmonary hypertension. Our data have uncovered a previously unrecognized regulatory function of BMPR-II, which acts to regulate the expression of CXCR2 on endothelial cells, suggesting that increased CXCR2 signaling may also be a feature of the human pathology and that CXCR1/2 pathway antagonists may represent a novel therapeutic approach for treating pulmonary hypertension because of defects in BMPR-II expression.
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86
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Fang C, Corrigan CJ, Ying S. Identifying and testing potential new anti-asthma agents. Expert Opin Drug Discov 2011; 6:1027-44. [PMID: 22646862 DOI: 10.1517/17460441.2011.608659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Inhaled corticosteroids alone or with long-acting beta-2 agonists (LABA) are the basic treatment for stable asthma. While the majority of patients are controllable, some patients retain chronic severe disease and develop permanent alterations in airway function. For patients such as these it is important to better understand the mechanisms of asthma so that alternative approaches can be developed. AREA COVERED Based on data from in vitro cell culture, animal models and clinical trials, this review discusses potential agents targeting either key effector cells, mediators and their receptors in asthma pathogenesis or their signaling cascade molecules. EXPERT OPINION As targeting single Th2 cytokines and their receptors has been shown to have limited clinical benefit, it is important to identify and test potential new therapeutic agents. Recent studies suggest that blockade of IgE synthesis, its interaction with its receptors and downstream signaling, identification of molecular targets in innate immune and airways structural cells, and fresh anti-neutrophil strategies should be prominent among these. Further studies are required to clarify the relationship between airways remodeling and asthma severity so that appropriate patients may be targeted.
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Affiliation(s)
- Cailong Fang
- Guy's Hospital, King's College London, MRC and Asthma UK Centre in Allergic Mechanisms of Asthma , Department of Asthma , Allergy and Respiratory Science, 5th Floor, Tower Wing, London SE1 9RT , UK +44 207 188 3392 ;
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87
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Mihara K, Wijkmans J. Low Molecular Weight CXCR2 Antagonists as Promising Therapeutics. METHODS AND PRINCIPLES IN MEDICINAL CHEMISTRY 2011. [DOI: 10.1002/9783527631995.ch12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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88
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Fox J, Gordon JR, Haston CK. Combined CXCR1/CXCR2 antagonism decreases radiation-induced alveolitis in the mouse. Radiat Res 2011; 175:657-64. [PMID: 21342009 DOI: 10.1667/rr2449.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The mechanisms leading to the radiation-induced lung responses of alveolitis and fibrosis are largely unknown. Herein we investigated whether CXC receptor 1 and 2 antagonism with CXCL8((3-72))K11R/G31P (G31P), a protein that reduces neutrophil chemotaxis in acute inflammatory response models, decreases the lung response to radiation. Mice of the AKR/J (alveolitis/pneumonitis responding) and KK/HIJ (fibrosis) strains received 18 Gy whole-thorax irradiation and a subset of these mice were treated with G31P (500 µg/kg) three times per week from the day of irradiation until euthanasia due to respiratory distress symptoms or 20 weeks after radiation treatment. Irradiated mice of both strains receiving G31P survived longer than mice receiving radiation alone. Radiation- and G31P-treated AKR/J mice surviving to the end of the experiment developed significantly less alveolitis, as measured histologically, than mice receiving radiation alone, but this difference was not evident in KK/HIJ mice. Using immunohistochemistry, G31P treatment was shown to increase the numbers of Gr-1-positive cells (neutrophils) in the lungs of unirradiated mice relative to control mice injected with saline, but the antagonist did not alter the numbers of Gr-1-positive cells in the lungs of radiation-treated mice. We conclude that G31P treatment reduces radiation-induced alveolitis but not fibrosis in mice.
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Affiliation(s)
- Jessica Fox
- Department of Medicine and the Meakins-Christie Laboratories, McGill University, 3626 St. Urbain Montreal, Quebec, Canada, H2X 2P2
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89
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The Cystic Fibrosis Neutrophil: A Specialized Yet Potentially Defective Cell. Arch Immunol Ther Exp (Warsz) 2011; 59:97-112. [DOI: 10.1007/s00005-011-0113-6] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Accepted: 10/27/2010] [Indexed: 12/20/2022]
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90
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Luesink M, Jansen JH. Advances in understanding the pulmonary infiltration in acute promyelocytic leukaemia. Br J Haematol 2010; 151:209-20. [PMID: 20735400 DOI: 10.1111/j.1365-2141.2010.08325.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In acute promyelocytic leukaemia (APL), differentiation therapy can be complicated by the development of a differentiation syndrome (DS). Pulmonary infiltration of differentiating leukaemic cells is a key event in the development of DS. Several mediators have been identified that may promote migration and extravasation of differentiating APL cells from the bloodstream into the tissue. Adhesion of APL cells to each other and to the endothelium is induced by upregulation of the expression of adhesion molecules and constitutively active β2-integrins during differentiation therapy. The expression of chemokines and their receptors is significantly upregulated as well. Pulmonary chemokine production can trigger transendothelial migration of differentiating APL cells from the bloodstream into the underlying tissue (initiation phase of DS). Massive production of chemokines by infiltrated APL cells can further enhance transendothelial migration of differentiating APL cells, causing an uncontrollable hyperinflammatory reaction in the lung (aggravation phase), which is not efficiently switched-off by corticosteroids.
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Affiliation(s)
- Maaike Luesink
- Radboud University Nijmegen Medical Centre, The Netherlands
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91
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Sogawa Y, Ohyama T, Maeda H, Hirahara K. Inhibition of neutrophil migration in mice by mouse formyl peptide receptors 1 and 2 dual agonist: indication of cross-desensitization in vivo. Immunology 2010; 132:441-50. [PMID: 21039475 DOI: 10.1111/j.1365-2567.2010.03367.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
It has been reported that the stimulation of neutrophils with N-formyl-Met-Leu-Phe (fMLF), an agonist for formyl peptide receptor (Fpr) 1, renders cells unresponsive to other chemoattractants in vitro. This is known as cross-desensitization, but its functional relevance in neutrophil migration in vivo has not been investigated. Here, we show that precedent stimulation of mouse neutrophils with compound 43, a non-peptidyl agonist for mouse Fpr1 and Fpr2, rendered the cells unresponsive to a second stimulation with C5a, leukotriene B₄, or keratinocyte-derived cytokine (KC) in calcium mobilization and chemotaxis assays in vitro. The expression of chemokine (C-X-C motif) receptor 2 (CXCR2) on the surface of neutrophils was concomitantly diminished by stimulating the cells with the compound. Moreover, oral administration of the compound to mice before they were exposed to lipopolysaccharide (LPS) aerosol resulted in a dose-dependent reduction in the neutrophil count in bronchoalveolar lavage fluid. The expression of CXCR2 on blood neutrophils was also reduced in the compound-administered mice. The recipient mice that underwent adoptive transfer of fluorescence-labelled neutrophils that had been incubated with the compound showed a substantial decrease in neutrophil counts in bronchoalveolar lavage fluid after they were exposed to LPS, when compared with the control mice to which vehicle-treated neutrophils had been transferred. These results are consistent with the idea that the agonist for Fpr1 and Fpr2 induced cross-desensitization in neutrophils and attenuated neutrophil migration into the airways. Our results also revealed the unpredicted effect of an Fpr1 and Fpr2 dual agonist, which may act as a functional antagonist for multiple chemoattractant receptors in vivo.
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Affiliation(s)
- Yoshitaka Sogawa
- Cardiovascular-Metabolics Research Laboratories, Daiichi Sankyo, Co., Ltd, Shinagawa-ku, Tokyo
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92
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Vauquelin G, Charlton SJ. Long-lasting target binding and rebinding as mechanisms to prolong in vivo drug action. Br J Pharmacol 2010; 161:488-508. [PMID: 20880390 PMCID: PMC2990149 DOI: 10.1111/j.1476-5381.2010.00936.x] [Citation(s) in RCA: 206] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 05/17/2010] [Accepted: 06/10/2010] [Indexed: 11/28/2022] Open
Abstract
An increasing number of examples in the literature suggest that the in vivo duration of drug action not only depends on macroscopic pharmacokinetic properties like plasma half-life and the time needed to equilibrate between the plasma and the effect compartments, but is also influenced by long-lasting target binding and rebinding. The present review combines information from different research areas and simulations to explore the nature of these mechanisms and the conditions in which they are most prevalent. Simulations reveal that these latter phenomena become especially influential when there is no longer sufficient free drug around to maintain high levels of receptor occupancy. There is not always a direct link between slow dissociation and long-lasting in vivo target protection, as the rate of free drug elimination from the effect compartment is also a key influencing factor. Local phenomena that hinder the diffusion of free drug molecules away from their target may allow them to consecutively bind to the same target and/or targets nearby (denoted as 'rebinding') even when their concentration in the bulk phase has already dropped to insignificant levels. The micro-anatomic properties of many effect compartments are likely to intensify this phenomenon. By mimicking the complexity of tissues, intact cells offer the opportunity to investigate both mechanisms under the same, physiologically relevant conditions.
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Affiliation(s)
- Georges Vauquelin
- Department of Molecular and Biochemical Pharmacology, Vrije Universiteit Brussel, Brussels, Belgium.
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93
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The collagen-breakdown product N-acetyl-Proline-Glycine-Proline (N-α-PGP) does not interact directly with human CXCR1 and CXCR2. Eur J Pharmacol 2010; 643:29-33. [DOI: 10.1016/j.ejphar.2010.06.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Revised: 06/10/2010] [Accepted: 06/15/2010] [Indexed: 01/28/2023]
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94
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Mui TS, Man SP, Sin DD. Developments in drugs for the treatment of chronic obstructive pulmonary disease. Expert Rev Clin Immunol 2010; 4:365-77. [PMID: 20476926 DOI: 10.1586/1744666x.4.3.365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) affects more than 600 million adults worldwide and accounts for 3 million deaths annually. Approximately 50% of the cases are directly attributable to cigarette smoking; the rest are accounted for by different risk factors, including childhood infections, genetic defects, environmental pollution and biomass exposure. The mainstay of current drug treatment is bronchodilation. Anti-inflammatory drugs are reserved for patients with moderate-to-severe disease. In this article, we will review the current paradigm of COPD pathogenesis and discuss some promising molecular targets that may be modified in the future to improve health outcomes of patients with COPD.
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Affiliation(s)
- Tammy Sy Mui
- The Providence Heart and Lung Center, The James Hogg iCAPTURE Center for Cardiovascular and Pulmonary Research, St Paul's Hospital & the Department of Medicine (Respiratory Division), The University of British Columbia, Vancouver, BC, Canada.
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95
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Sharma B, Singh S, Varney ML, Singh RK. Targeting CXCR1/CXCR2 receptor antagonism in malignant melanoma. Expert Opin Ther Targets 2010; 14:435-42. [PMID: 20230195 DOI: 10.1517/14728221003652471] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
IMPORTANCE OF THE FIELD The incidence of malignant melanoma is increasing throughout the world and is currently rising faster than any other cancer in men and second only to lung cancer in women. Current strategies focused on systemic therapy for treatment of melanoma have shown no effect on survival. Therefore there is a pressing need for developing novel targeted therapeutics. AREAS COVERED IN THIS REVIEW Our goal is to provide an overview regarding targeting CXCR1/2 in malignant melanoma, the rationale behind these approaches and the future perspective. WHAT THE READER WILL GAIN This review illustrates our current understanding of CXCR1/2 receptor in melanoma progression and metastasis. We describe approaches that are being developed to block CXCR1/2 activation, including low-molecular-weight antagonists, modified chemokines and antibodies directed against ligands and receptors. TAKE HOME MESSAGE The chemokine receptors CXCR1 and CXCR2 and their ligands play an important role in the pathogenesis of malignant melanoma. Recent reports demonstrated that CXCR1 is constitutively expressed in all melanoma cases irrespective of stage and grade, however, CXCR2 expression was restricted to aggressive melanoma tumors,. Furthermore, modulation of CXCR1/2 expression and/or activity has been shown to regulate malignant melanoma growth, angiogenesis and metastasis, suggesting CXCR1/2 targeting as a novel therapeutic approach for malignant melanoma.
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Affiliation(s)
- Bhawna Sharma
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5900, USA
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96
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Rondini EA, Walters DM, Bauer AK. Vanadium pentoxide induces pulmonary inflammation and tumor promotion in a strain-dependent manner. Part Fibre Toxicol 2010; 7:9. [PMID: 20385015 PMCID: PMC2861012 DOI: 10.1186/1743-8977-7-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 04/12/2010] [Indexed: 11/10/2022] Open
Abstract
Background Elevated levels of air pollution are associated with increased risk of lung cancer. Particulate matter (PM) contains transition metals that may potentiate neoplastic development through the induction of oxidative stress and inflammation, a lung cancer risk factor. Vanadium pentoxide (V2O5) is a component of PM derived from fuel combustion as well as a source of occupational exposure in humans. In the current investigation we examined the influence of genetic background on susceptibility to V2O5-induced inflammation and evaluated whether V2O5 functions as a tumor promoter using a 2-stage (initiation-promotion) model of pulmonary neoplasia in mice. Results A/J, BALB/cJ (BALB), and C57BL/6J (B6) mice were treated either with the initiator 3-methylcholanthrene (MCA; 10 μg/g; i.p.) or corn oil followed by 5 weekly aspirations of V2O5 or PBS and pulmonary tumors were enumerated 20 weeks following MCA treatment. Susceptibility to V2O5-induced pulmonary inflammation was assessed in bronchoalveolar lavage fluid (BALF), and chemokines, transcription factor activity, and MAPK signaling were quantified in lung homogenates. We found that treatment of animals with MCA followed by V2O5 promoted lung tumors in both A/J (10.3 ± 0.9 tumors/mouse) and BALB (2.2 ± 0.36) mice significantly above that observed with MCA/PBS or V2O5 alone (P < 0.05). No tumors were observed in the B6 mice in any of the experimental groups. Mice sensitive to tumor promotion by V2O5 were also found to be more susceptible to V2O5-induced pulmonary inflammation and hyperpermeability (A/J>BALB>B6). Differential strain responses in inflammation were positively associated with elevated levels of the chemokines KC and MCP-1, higher NFκB and c-Fos binding activity, as well as sustained ERK1/2 activation in lung tissue. Conclusions In this study we demonstrate that V2O5, an occupational and environmentally relevant metal oxide, functions as an in vivo lung tumor promoter among different inbred strains of mice. Further, we identified a positive relationship between tumor promotion and susceptibility to V2O5-induced pulmonary inflammation. These findings suggest that repeated exposures to V2O5 containing particles may augment lung carcinogenesis in susceptible individuals through oxidative stress mediated pathways.
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Affiliation(s)
- Elizabeth A Rondini
- Department of Pathobiology and Diagnostic Investigation and Center for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
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97
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Importance of CXC chemokine receptor 2 in alveolar neutrophil and exudate macrophage recruitment in response to pneumococcal lung infection. Infect Immun 2010; 78:2620-30. [PMID: 20368349 DOI: 10.1128/iai.01169-09] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Sustained neutrophilic infiltration is known to contribute to organ damage, such as acute lung injury. CXC chemokine receptor 2 (CXCR2) is the major receptor regulating inflammatory neutrophil recruitment in acute and chronic inflamed tissues. Whether or not the abundant neutrophil recruitment observed in severe pneumonia is essential for protective immunity against Streptococcus pneumoniae infections is incompletely defined. Here we show that CXCR2 deficiency severely perturbs the recruitment of both neutrophils and exudate macrophages associated with a massive bacterial outgrowth in distal airspaces after infection with S. pneumoniae, resulting in 100% mortality in knockout (KO) mice within 3 days. Moreover, irradiated wild-type mice reconstituted with increasing amounts of CXCR2 KO bone marrow (10, 25, 50, and 75% KO) have correspondingly decreased numbers of both neutrophils and exudate macrophages, which is associated with a stepwise increase in bacterial burden and a reciprocal stepwise decrease in survival in S. pneumoniae-induced pulmonary infection. Finally, application of the CXCR2 antagonist SB-225002 resulted in decreased alveolar neutrophil and exudate macrophage recruitment in mice along with increased lung bacterial loads after infection with S. pneumoniae. Together, these data show that CXC chemokine receptor 2 serves a previously unrecognized nonredundant role in the regulation of both neutrophil and exudate macrophage recruitment to the lung in response to S. pneumoniae infection. In addition, we demonstrate that a threshold level of 10 to 25% of reduced neutrophil recruitment is sufficient to cause increased mortality in mice infected with S. pneumoniae.
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98
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Singh S, Singh AP, Sharma B, Owen LB, Singh RK. CXCL8 and its cognate receptors in melanoma progression and metastasis. Future Oncol 2010; 6:111-6. [PMID: 20021212 DOI: 10.2217/fon.09.128] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The incidence of melanoma is rising at an alarming rate and we are still awaiting an effective treatment for this malignancy. In its early stage, melanoma can be cured by surgical removal, but once metastasis has occurred there is no effective treatment. Recent findings have suggested multiple functional implications of CXCL8 and its cognate receptors, CXCR1 and CXCR2, in melanoma pathogenesis, thus underscoring their importance as targets for cancer therapy. This review provides an update on the roles of CXCL8 and its receptors in melanoma progression and metastasis.
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Affiliation(s)
- Seema Singh
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, AL, USA
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99
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Macario CC, Torres Tajes JPD, Lanus EC. EPOC: inflamación bronquial y sistémica. Arch Bronconeumol 2010; 46 Suppl 4:9-15. [DOI: 10.1016/s0300-2896(10)70027-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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100
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The role of chemokines in B cell chronic lymphocytic leukaemia: pathophysiological aspects and clinical impact. Ann Hematol 2009; 89:437-46. [PMID: 20020127 DOI: 10.1007/s00277-009-0876-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Accepted: 11/26/2009] [Indexed: 12/17/2022]
Abstract
Chemokines are centrally involved in leukocyte migration, homing and haematopoiesis. Besides these physiological aspects, their role in pathological processes especially with respect to solid tumour and haematological neoplasias is well established. In this context, the focus was set here on disclosing their contribution in B cell chronic lymphocytic leukaemia (B-CLL), which is regarded as the most characteristic low-grade lymphoma. Up to now, it has been demonstrated that several chemokines are involved in migration of B-CLL cells to lymph nodes, secondary lymphoid organs and bone marrow. Moreover, some chemokines are known to have an anti-apoptotic effect and thus contribute to the survival of B-CLL cells. By interfering with both of these aspects, new therapeutic targets for this yet incurable disease may be developed. Furthermore, a correlation can be drawn between the concentration of some chemokines in patients' serum, the expression of their respective receptors on B-CLL cells and well-established predictive clinical parameters. Consequently, further systematic investigation of the chemokine network may lead to the identification of new diagnostic and prognostic markers. This review focuses on the impact of chemokines and their receptors on B-CLL pathophysiology and points out potential implications for both treatment and diagnosis.
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