51
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Arebro J, Ekstedt S, Hjalmarsson E, Winqvist O, Kumlien Georén S, Cardell LO. A possible role for neutrophils in allergic rhinitis revealed after cellular subclassification. Sci Rep 2017; 7:43568. [PMID: 28272395 PMCID: PMC5341103 DOI: 10.1038/srep43568] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 01/25/2017] [Indexed: 12/13/2022] Open
Abstract
A re-examination of former concepts is required to meet today’s medical challenges in allergic rhinitis. Previously, neutrophils have been treated as a relatively homogenous cell population found in the nose both when the patient is suffering at the height of the allergic season as well as when the patient report no symptoms. However, new data indicates that neutrophils can be divided into different subsets with diverse roles in inflammation. We showed increased levels of neutrophils in peripheral blood, nasal biopsies and nasal lavage fluid (NAL) from allergic patients during the pollen season compared to healthy controls. A closer examination revealed that the activated subset of neutrophils, CD16high CD62Ldim, outweighed the normal form CD16high CD62Lhigh in nasal tissue among these patients. This skewed distribution was not seen in controls. The normal subset prevailed in peripheral blood from patients as well as controls, whereas CD16high CD62Ldim and CD16dim CD62Ldim subsets, the latter considered “end state” neutrophils before apoptosis, were elevated in NAL. Functional in vitro experiments revealed that activated neutrophils exhibit a T cell priming capacity and an ability to enhance eosinophil migration. Activated neutrophils may thus contribute to allergic inflammation seen in allergic rhinitis by priming T cells and attracting eosinophils.
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Affiliation(s)
- Julia Arebro
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.,Department of ENT Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Sandra Ekstedt
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Eric Hjalmarsson
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Ola Winqvist
- Department of Medicine, Unit of Translational Immunology, Karolinska Institutet, Stockholm, Sweden
| | - Susanna Kumlien Georén
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Lars-Olaf Cardell
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.,Department of ENT Diseases, Karolinska University Hospital, Stockholm, Sweden
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52
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Gouveia-Figueira S, Karimpour M, Bosson JA, Blomberg A, Unosson J, Pourazar J, Sandström T, Behndig AF, Nording ML. Mass spectrometry profiling of oxylipins, endocannabinoids, and N-acylethanolamines in human lung lavage fluids reveals responsiveness of prostaglandin E2 and associated lipid metabolites to biodiesel exhaust exposure. Anal Bioanal Chem 2017; 409:2967-2980. [PMID: 28235994 PMCID: PMC5366178 DOI: 10.1007/s00216-017-0243-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/24/2017] [Accepted: 02/02/2017] [Indexed: 12/18/2022]
Abstract
The adverse effects of petrodiesel exhaust exposure on the cardiovascular and respiratory systems are well recognized. While biofuels such as rapeseed methyl ester (RME) biodiesel may have ecological advantages, the exhaust generated may cause adverse health effects. In the current study, we investigated the responses of bioactive lipid mediators in human airways after biodiesel exhaust exposure using lipidomic profiling methods. Lipid mediator levels in lung lavage were assessed following 1-h biodiesel exhaust (average particulate matter concentration, 159 μg/m3) or filtered air exposure in 15 healthy individuals in a double-blinded, randomized, controlled, crossover study design. Bronchoscopy was performed 6 h post exposure and lung lavage fluids, i.e., bronchial wash (BW) and bronchoalveolar lavage (BAL), were sequentially collected. Mass spectrometry methods were used to detect a wide array of oxylipins (including eicosanoids), endocannabinoids, N-acylethanolamines, and related lipid metabolites in the collected BW and BAL samples. Six lipids in the human lung lavage samples were altered following biodiesel exhaust exposure, three from BAL samples and three from BW samples. Of these, elevated levels of PGE2, 12,13-DiHOME, and 13-HODE, all of which were found in BAL samples, reached Bonferroni-corrected significance. This is the first study in humans reporting responses of bioactive lipids following biodiesel exhaust exposure and the most pronounced responses were seen in the more peripheral and alveolar lung compartments, reflected by BAL collection. Since the responsiveness and diagnostic value of a subset of the studied lipid metabolites were established in lavage fluids, we conclude that our mass spectrometry profiling method is useful to assess effects of human exposure to vehicle exhaust.
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Affiliation(s)
| | | | - Jenny A Bosson
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Anders Blomberg
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Jon Unosson
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Jamshid Pourazar
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Thomas Sandström
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Annelie F Behndig
- Department of Public Health and Clinical Medicine, Division of Medicine/Respiratory Medicine, Umeå University, 90187, Umeå, Sweden
| | - Malin L Nording
- Department of Chemistry, Umeå University, 90187, Umeå, Sweden.
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53
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Plasma 15-Hydroxyeicosatetraenoic Acid Predicts Treatment Outcomes in Aspirin-Exacerbated Respiratory Disease. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2017; 5:998-1007.e2. [PMID: 28159558 DOI: 10.1016/j.jaip.2016.11.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 11/01/2016] [Accepted: 11/23/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND Aspirin desensitization followed by daily aspirin provides therapeutic benefits to patients with aspirin-exacerbated respiratory disease (AERD). It is not well understood how eicosanoid levels change during aspirin treatment. OBJECTIVE To investigate associations between clinical outcomes of aspirin treatment and plasma eicosanoid levels in patients with AERD. METHODS Thirty-nine patients with AERD were offered aspirin treatment (650 mg twice daily) for 4 weeks. Respiratory parameters and plasma levels of multiple eicosanoids were recorded at baseline and after 4 weeks of aspirin therapy using the Asthma Control Test and Rhinoconjunctivitis Quality of Life Questionnaire. Respiratory function was evaluated using the FEV1 and nasal inspiratory peak flow. RESULTS After aspirin treatment, respiratory symptoms improved in 16 patients, worsened in 12 patients, and did not change in 4 patients. Seven patients were unable to complete the desensitization protocol. Patients with symptom improvement had higher baseline plasma 15-hydroxyeicosatetraenoic acid (15-HETE) levels than did patients with symptom worsening: 7006 pg/mL (interquartile range, 6056-8688 pg/mL) versus 4800 pg/mL (interquartile range, 4238-5575 pg/mL), P = .0005. Baseline 15-HETE plasma levels positively correlated with the change in Asthma Control Test score (r = 0.61; P = .001) and in FEV1 after 4 weeks of aspirin treatment (r = 0.49; P = .01). It inversely correlated with Rhinoconjunctivitis Quality of Life Questionnaire score (r = -0.58; P = .002). Black and Latino patients were more likely to have symptom worsening on aspirin or fail to complete the initial desensitization than white, non-Latino patients (P = .02). CONCLUSIONS In patients with AERD, low baseline 15-HETE plasma levels and black or Latino ethnicity are associated with worsening of respiratory symptoms during aspirin treatment.
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54
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Movassagh H, Shan L, Mohammed A, Halayko AJ, Gounni AS. Semaphorin 3E Deficiency Exacerbates Airway Inflammation, Hyperresponsiveness, and Remodeling in a Mouse Model of Allergic Asthma. THE JOURNAL OF IMMUNOLOGY 2017; 198:1805-1814. [PMID: 28108561 DOI: 10.4049/jimmunol.1601514] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 12/19/2016] [Indexed: 01/17/2023]
Abstract
Semaphorin 3E (Sema3E) plays a crucial role in axon guidance, vascular patterning, and immune regulation. Nevertheless, the role of Sema3E in asthma is still elusive. In this study, we show that genetic ablation of Sema3E in mice results in increased lung granulocytosis, airway hyperresponsiveness, mucus overproduction, collagen deposition, and Th2/Th17 inflammation. Transfer of Sema3e-/- bone marrow progenitor cells to irradiated wild-type (WT) recipients exacerbates airway hyperresponsiveness and inflammation, whereas transfer of WT bone marrow progenitor cells ameliorates asthma pathology in Sema3e-/- recipients. Sema3e-/- mice display a higher frequency of CD11b+ pulmonary dendritic cells than their WT controls at the baseline and after sensitization with house dust mite. Adoptive transfer of CD11b+ pulmonary dendritic cells from Sema3e-/- mice into WT recipients increases house dust mite-induced Th2/Th17 inflammation in the airway. Together, these findings identify Sema3E as a novel regulatory molecule in allergic asthma that acts upstream of proallergic events and suggest that targeting this molecule could be a novel approach to treat allergic asthma.
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Affiliation(s)
- Hesam Movassagh
- Department of Immunology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5, Canada; and
| | - Lianyu Shan
- Department of Immunology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5, Canada; and
| | - Ashfaque Mohammed
- Department of Immunology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5, Canada; and
| | - Andrew J Halayko
- Department of Immunology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5, Canada; and.,Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5 Canada
| | - Abdelilah S Gounni
- Department of Immunology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba R3E 0T5, Canada; and
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55
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Eleftheriadis N, Thee SA, Zwinderman MRH, Leus NGJ, Dekker FJ. Activity-Based Probes for 15-Lipoxygenase-1. Angew Chem Int Ed Engl 2016; 55:12300-5. [PMID: 27612308 PMCID: PMC5218545 DOI: 10.1002/anie.201606876] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Indexed: 12/12/2022]
Abstract
Human 15-lipoxygenase-1 (15-LOX-1) plays an important role in several inflammatory lung diseases, such as asthma, COPD, and chronic bronchitis, as well as various CNS diseases, such as Alzheimer's disease, Parkinson's disease, and stroke. Activity-based probes of 15-LOX-1 are required to explore the role of this enzyme further and to enable drug discovery. In this study, we developed a 15-LOX-1 activity-based probe for the efficient activity-based labeling of recombinant 15-LOX-1. 15-LOX-1-dependent labeling in cell lysates and tissue samples was also possible. To mimic the natural substrate of the enzyme, we designed activity-based probes that covalently bind to the active enzyme and include a terminal alkene as a chemical reporter for the bioorthogonal linkage of a detectable functionality through an oxidative Heck reaction. The activity-based labeling of 15-LOX-1 should enable the investigation and identification of this enzyme in complex biological samples, thus opening up completely new opportunities for drug discovery.
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Affiliation(s)
- Nikolaos Eleftheriadis
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Stephanie A Thee
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Martijn R H Zwinderman
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Niek G J Leus
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Frank J Dekker
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
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56
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Eleftheriadis N, Thee SA, Zwinderman MRH, Leus NGJ, Dekker FJ. Activity-Based Probes for 15-Lipoxygenase-1. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606876] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nikolaos Eleftheriadis
- Department of Chemical and Pharmaceutical Biology; Groningen Research Institute of Pharmacy; University of Groningen; Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Stephanie A. Thee
- Department of Chemical and Pharmaceutical Biology; Groningen Research Institute of Pharmacy; University of Groningen; Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Martijn R. H. Zwinderman
- Department of Chemical and Pharmaceutical Biology; Groningen Research Institute of Pharmacy; University of Groningen; Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Niek G. J. Leus
- Department of Chemical and Pharmaceutical Biology; Groningen Research Institute of Pharmacy; University of Groningen; Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Frank J. Dekker
- Department of Chemical and Pharmaceutical Biology; Groningen Research Institute of Pharmacy; University of Groningen; Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
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57
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Banti CN, Papatriantafyllopoulou C, Manoli M, Tasiopoulos AJ, Hadjikakou SK. Nimesulide Silver Metallodrugs, Containing the Mitochondriotropic, Triaryl Derivatives of Pnictogen; Anticancer Activity against Human Breast Cancer Cells. Inorg Chem 2016; 55:8681-96. [DOI: 10.1021/acs.inorgchem.6b01241] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Christina N. Banti
- Inorganic and Analytical Chemistry, Department
of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | | | - Maria Manoli
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus
| | | | - Sotiris K. Hadjikakou
- Inorganic and Analytical Chemistry, Department
of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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58
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Shapiro H, Singer P, Ariel A. Beyond the classic eicosanoids: Peripherally-acting oxygenated metabolites of polyunsaturated fatty acids mediate pain associated with tissue injury and inflammation. Prostaglandins Leukot Essent Fatty Acids 2016; 111:45-61. [PMID: 27067460 DOI: 10.1016/j.plefa.2016.03.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 02/25/2016] [Accepted: 03/01/2016] [Indexed: 02/06/2023]
Abstract
Pain is a complex sensation that may be protective or cause undue suffering and loss of function, depending on the circumstances. Peripheral nociceptor neurons (PNs) innervate most tissues, and express ion channels, nocisensors, which depolarize the cell in response to intense stimuli and numerous substances. Inflamed tissues manifest inflammatory hyperalgesia in which the threshold for pain and the response to painful stimuli are decreased and increased, respectively. Constituents of the inflammatory milieu sensitize PNs, thereby contributing to hyperalgesia. Polyunsaturated fatty acids undergo enzymatic and free radical-mediated oxygenation into an array of bioactive metabolites, oxygenated polyunsaturated fatty acids (oxy-PUFAs), including the classic eicosanoids. Oxy-PUFA production is enhanced during inflammation. Pioneering studies by Vane and colleagues from the early 1970s first implicated classic eicosanoids in the pain associated with inflammation. Here, we review the production and action of oxy-PUFAs that are not classic eicosanoids, but nevertheless are produced in injured/ inflamed tissues and activate or sensitize PNs. In general, oxy-PUFAs that sensitize PNs may do so directly, by activation of nocisensors, ion channels or GPCRs expressed on the surface of PNs, or indirectly, by increasing the production of inflammatory mediators that activate or sensitize PNs. We focus on oxy-PUFAs that act directly on PNs. Specifically, we discuss the role of arachidonic acid-derived 12S-HpETE, HNE, ONE, PGA2, iso-PGA2 and 15d-PGJ2, 5,6-and 8,9-EET, PGE2-G and 8R,15S-diHETE, as well as the linoleic acid-derived 9-and 13-HODE in inducing acute nocifensive behavior and/or inflammatory hyperalgesia in rodents. The nocisensors TRPV1, TRPV4 and TRPA1, and putative Gαs-type GPCRs are the PN targets of these oxy-PUFAs.
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Affiliation(s)
- Haim Shapiro
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, 199 Abba Khoushy Ave, Mount Carmel, Haifa 3498838, Israel.
| | - Pierre Singer
- Department of General Intensive Care, Institute for Nutrition Research, Rabin Medical Center, Sackler School of Medicine, Tel Aviv University, Petah Tikva 49100, Israel
| | - Amiram Ariel
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, 199 Abba Khoushy Ave, Mount Carmel, Haifa 3498838, Israel
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59
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Buland JR, Wasserloos KJ, Tyurin VA, Tyurina YY, Amoscato AA, Mallampalli RK, Chen BB, Zhao J, Zhao Y, Ofori-Acquah S, Kagan VE, Pitt BR. Biosynthesis of oxidized lipid mediators via lipoprotein-associated phospholipase A2 hydrolysis of extracellular cardiolipin induces endothelial toxicity. Am J Physiol Lung Cell Mol Physiol 2016; 311:L303-16. [PMID: 27233995 PMCID: PMC5142456 DOI: 10.1152/ajplung.00038.2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/24/2016] [Indexed: 01/16/2023] Open
Abstract
We (66) have previously described an NSAID-insensitive intramitochondrial biosynthetic pathway involving oxidation of the polyunsaturated mitochondrial phospholipid, cardiolipin (CL), followed by hydrolysis [by calcium-independent mitochondrial calcium-independent phospholipase A2-γ (iPLA2γ)] of oxidized CL (CLox), leading to the formation of lysoCL and oxygenated octadecadienoic metabolites. We now describe a model system utilizing oxidative lipidomics/mass spectrometry and bioassays on cultured bovine pulmonary artery endothelial cells (BPAECs) to assess the impact of CLox that we show, in vivo, can be released to the extracellular space and may be hydrolyzed by lipoprotein-associated PLA2 (Lp-PLA2). Chemically oxidized liposomes containing bovine heart CL produced multiple oxygenated species. Addition of Lp-PLA2 hydrolyzed CLox and produced (oxygenated) monolysoCL and dilysoCL and oxidized octadecadienoic metabolites including 9- and 13-hydroxyoctadecadienoic (HODE) acids. CLox caused BPAEC necrosis that was exacerbated by Lp-PLA2 Lower doses of nonlethal CLox increased permeability of BPAEC monolayers. This effect was exacerbated by Lp-PLA2 and partially mimicked by authentic monolysoCL or 9- or 13-HODE. Control mice plasma contained virtually no detectable CLox; in contrast, 4 h after Pseudomonas aeruginosa (P. aeruginosa) infection, 34 ± 8 mol% (n = 6; P < 0.02) of circulating CL was oxidized. In addition, molar percentage of monolysoCL increased twofold after P. aeruginosa in a subgroup analyzed for these changes. Collectively, these studies suggest an important role for 1) oxidation of CL in proinflammatory environments and 2) possible hydrolysis of CLox in extracellular spaces producing lysoCL and oxidized octadecadienoic acid metabolites that may lead to impairment of pulmonary endothelial barrier function and necrosis.
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Affiliation(s)
- Justin R Buland
- Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania; University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Vascular Medicine Institute, Pittsburgh, Pennsylvania
| | - Karla J Wasserloos
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
| | - Vladimir A Tyurin
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
| | - Yulia Y Tyurina
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
| | - Andrew A Amoscato
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
| | - Rama K Mallampalli
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Acute Lung Injury Center of Excellence, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; VA Pittsburgh Health Care System, Pittsburgh, Pennsylvania; Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Bill B Chen
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Acute Lung Injury Center of Excellence, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Jing Zhao
- Vascular Medicine Institute, Pittsburgh, Pennsylvania; Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Acute Lung Injury Center of Excellence, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Yutong Zhao
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Vascular Medicine Institute, Pittsburgh, Pennsylvania; Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Acute Lung Injury Center of Excellence, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Solomon Ofori-Acquah
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Vascular Medicine Institute, Pittsburgh, Pennsylvania
| | - Valerian E Kagan
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
| | - Bruce R Pitt
- University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania;
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60
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Eleftheriadis N, Poelman H, Leus NGJ, Honrath B, Neochoritis CG, Dolga A, Dömling A, Dekker FJ. Design of a novel thiophene inhibitor of 15-lipoxygenase-1 with both anti-inflammatory and neuroprotective properties. Eur J Med Chem 2016; 122:786-801. [PMID: 27477687 DOI: 10.1016/j.ejmech.2016.07.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/05/2016] [Accepted: 07/07/2016] [Indexed: 01/18/2023]
Abstract
The enzyme 15-lipoxygenase-1 (15-LOX-1) plays a dual role in diseases with an inflammatory component. On one hand 15-LOX-1 plays a role in pro-inflammatory gene expression and on the other hand it has been shown to be involved in central nervous system (CNS) disorders by its ability to mediate oxidative stress and damage of mitochondrial membranes under hypoxic conditions. In order to further explore applications in the CNS, novel 15-LOX-1 inhibitors with favorable physicochemical properties need to be developed. Here, we present Substitution Oriented Screening (SOS) in combination with Multi Component Chemistry (MCR) as an effective strategy to identify a diversely substituted small heterocyclic inhibitors for 15-LOX-1, denoted ThioLox, with physicochemical properties superior to previously identified inhibitors. Ex vivo biological evaluation in precision-cut lung slices (PCLS) showed inhibition of pro-inflammatory gene expression and in vitro studies on neuronal HT-22 cells showed a strong protection against glutamate toxicity for this 15-LOX-1 inhibitor. This provides a novel approach to identify novel small with favorable physicochemical properties for exploring 15-LOX-1 as a drug target in inflammatory diseases and neurodegeneration.
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Affiliation(s)
- Nikolaos Eleftheriadis
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Hessel Poelman
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Niek G J Leus
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Birgit Honrath
- Institute of Pharmacology and Clinical Pharmacy, Philipps-University Marburg, Marburg, Germany
| | - Constantinos G Neochoritis
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Amalia Dolga
- Department of Molecular Pharmacology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Alexander Dömling
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
| | - Frank J Dekker
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, 9713 AV, The Netherlands
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61
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Baker K, Raemdonck K, Dekkak B, Snelgrove RJ, Ford J, Shala F, Belvisi MG, Birrell MA. Role of the ion channel, transient receptor potential cation channel subfamily V member 1 (TRPV1), in allergic asthma. Respir Res 2016; 17:67. [PMID: 27255083 PMCID: PMC4890475 DOI: 10.1186/s12931-016-0384-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 05/26/2016] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Asthma prevalence has increased world-wide especially in children; thus there is a need to develop new therapies that are safe and effective especially for patients with severe/refractory asthma. CD4(+) T cells are thought to play a central role in disease pathogenesis and associated symptoms. Recently, TRPV1 has been demonstrated to regulate the activation and inflammatory properties of CD4(+) cells. The aim of these experiments was to demonstrate the importance of CD4(+) T cells and the role of TRPV1 in an asthma model using a clinically ready TRPV1 inhibitor (XEN-D0501) and genetically modified (GM) animals. METHODS Mice (wild type, CD4 (-/-) or TRPV1 (-/-)) and rats were sensitised with antigen (HDM or OVA) and subsequently topically challenged with the same antigen. Key features associated with an allergic asthma type phenotype were measured: lung function (airway hyperreactivity [AHR] and late asthmatic response [LAR]), allergic status (IgE levels) and airway inflammation. RESULTS CD4(+) T cells play a central role in both disease model systems with all the asthma-like features attenuated. Targeting TRPV1 using either GM mice or a pharmacological inhibitor tended to decrease IgE levels, airway inflammation and lung function changes. CONCLUSION Our data suggests the involvement of TRPV1 in allergic asthma and thus we feel this target merits further investigation.
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Affiliation(s)
- Katie Baker
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Kristof Raemdonck
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
- Department of Anatomy, Faculty of Medicine, University of Porto, Alameda Prof. HernâniMonteiro, 4200-319, Porto, Portugal
- Center for Health Technology and Services Research (CINTESIS), Faculty of Medicine, University of Porto, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal
| | - Bilel Dekkak
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | | | - John Ford
- ArioPharma Limited, Iconix Park, London Road, Pampisford, CB22 3EG, UK
| | - Fisnik Shala
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Maria G Belvisi
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
- Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK
| | - Mark A Birrell
- Respiratory Pharmacology, Airway Disease Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
- Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK.
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Agrawal A, Mabalirajan U. Rejuvenating cellular respiration for optimizing respiratory function: targeting mitochondria. Am J Physiol Lung Cell Mol Physiol 2015; 310:L103-13. [PMID: 26566906 DOI: 10.1152/ajplung.00320.2015] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 11/10/2015] [Indexed: 12/26/2022] Open
Abstract
Altered bioenergetics with increased mitochondrial reactive oxygen species production and degradation of epithelial function are key aspects of pathogenesis in asthma and chronic obstructive pulmonary disease (COPD). This motif is not unique to obstructive airway disease, reported in related airway diseases such as bronchopulmonary dysplasia and parenchymal diseases such as pulmonary fibrosis. Similarly, mitochondrial dysfunction in vascular endothelium or skeletal muscles contributes to the development of pulmonary hypertension and systemic manifestations of lung disease. In experimental models of COPD or asthma, the use of mitochondria-targeted antioxidants, such as MitoQ, has substantially improved mitochondrial health and restored respiratory function. Modulation of noncoding RNA or protein regulators of mitochondrial biogenesis, dynamics, or degradation has been found to be effective in models of fibrosis, emphysema, asthma, and pulmonary hypertension. Transfer of healthy mitochondria to epithelial cells has been associated with remarkable therapeutic efficacy in models of acute lung injury and asthma. Together, these form a 3R model--repair, reprogramming, and replacement--for mitochondria-targeted therapies in lung disease. This review highlights the key role of mitochondrial function in lung health and disease, with a focus on asthma and COPD, and provides an overview of mitochondria-targeted strategies for rejuvenating cellular respiration and optimizing respiratory function in lung diseases.
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Affiliation(s)
- Anurag Agrawal
- CSIR Institute of Genomics and Integrative Biology, Delhi, India
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Eleftheriadis N, Neochoritis CG, Leus NGJ, van der Wouden PE, Dömling A, Dekker FJ. Rational Development of a Potent 15-Lipoxygenase-1 Inhibitor with in Vitro and ex Vivo Anti-inflammatory Properties. J Med Chem 2015; 58:7850-62. [PMID: 26331552 DOI: 10.1021/acs.jmedchem.5b01121] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Human 15-lipoxygenase-1 (h-15-LOX-1) is a mammalian lipoxygenase and plays an important role in several inflammatory lung diseases such as asthma, COPD, and chronic bronchitis. Novel potent inhibitors of h-15-LOX-1 are required to explore the role of this enzyme further and to enable drug discovery efforts. In this study, we applied an approach in which we screened a fragment collection that is focused on a diverse substitution pattern of nitrogen-containing heterocycles such as indoles, quinolones, pyrazoles, and others. We denoted this approach substitution-oriented fragment screening (SOS) because it focuses on the identification of novel substitution patterns rather than on novel scaffolds. This approach enabled the identification of hits with good potency and clear structure-activity relationships (SAR) for h-1-5-LOX-1 inhibition. Molecular modeling enabled the rationalization of the observed SAR and supported structure-based design for further optimization to obtain inhibitor 14 d that binds with a Ki of 36 nM to the enzyme. In vitro and ex vivo biological evaluations of our best inhibitor demonstrate a significant increase of interleukin-10 (IL-10) gene expression, which indicates its anti-inflammatory properties.
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Affiliation(s)
- Nikolaos Eleftheriadis
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Constantinos G Neochoritis
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Niek G J Leus
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Petra E van der Wouden
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Alexander Dömling
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Frank J Dekker
- Department of Pharmaceutical Gene Modulation, ‡Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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Ram A, Mabalirajan U, Jaiswal A, Rehman R, Singh VP, Ghosh B. Parabromophenacyl bromide inhibits subepithelial fibrosis by reducing TGF-β1 in a chronic mouse model of allergic asthma. Int Arch Allergy Immunol 2015; 167:110-8. [PMID: 26303861 DOI: 10.1159/000434679] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 05/28/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Our previous study showed that parabromophenacyl bromide (PBPB) inhibits the features of allergic airway inflammation and airway hyperresponsiveness (AHR). However, its effect on airway remodeling, e.g. subepithelial fibrosis in a chronic allergic asthma model, was not investigated. We examined this issue in this study. METHODS PBPB was administered to mice with an induced chronic asthmatic condition. AHR was estimated at the end of the experiment, followed by euthanasia. Lung sections were stained with hematoxylin and eosin, periodic acid-Schiff and Masson's trichrome to determine airway inflammation, goblet cell metaplasia and subepithelial fibrosis, respectively. Transforming growth factor-β1 (TGF-β1) was estimated in lung homogenates. To determine the effect of PBPB on smooth-muscle hyperplasia, immunohistochemistry against α-smooth-muscle actin was performed on the lung sections. RESULTS Chronic ovalbumin challenges in a mouse model of allergic asthma caused significant subepithelial fibrosis and elevated TGF-β1, along with significant AHR. PBPB attenuated subepithelial fibrosis with a reduction of lung TGF-β1, airway inflammation and AHR without affecting goblet cell metaplasia. It also attenuated smooth-muscle hyperplasia with a reduction in the expression of α-smooth-muscle actin in the lungs. CONCLUSION Our findings indicate that PBPB attenuates some crucial features of airway remodeling such as subepithelial fibrosis and smooth-muscle hyperplasia. These data suggest that PBPB could therefore be a therapeutic drug for chronic asthma.
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Affiliation(s)
- Arjun Ram
- CSIR Institute of Genomics and Integrative Biology, Delhi, India
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Abrial C, Grassin-Delyle S, Salvator H, Brollo M, Naline E, Devillier P. 15-Lipoxygenases regulate the production of chemokines in human lung macrophages. Br J Pharmacol 2015; 172:4319-30. [PMID: 26040494 DOI: 10.1111/bph.13210] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 04/01/2015] [Accepted: 05/27/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE 15-Lipoxygenase (15-LOX) activity is associated with inflammation and immune regulation. The objectives of the present study were to investigate the expression of 15-LOX-1 and 15-LOX-2 and evaluate the enzymes' roles in the polarization of human lung macrophages (LMs) in response to LPS and Th2 cytokines (IL-4/-13). EXPERIMENTAL APPROACH LMs were isolated from patients undergoing surgery for carcinoma. The cells were cultured with a 15-LOX inhibitor (PD146176 or ML351), a COX inhibitor (indomethacin), a 5-LOX inhibitor (MK886) or vehicle and then stimulated with LPS (10 ng · mL(-1)), IL-4 (10 ng · mL(-1)) or IL-13 (50 ng · mL(-1)) for 24 h. Levels of ALOX15 (15-LOX-1) and ALOX15B (15-LOX-2) transcripts were determined by real-time quantitative PCR. Immunoassays were used to measure levels of LPS-induced cytokines (TNF-α, CCL2, CCL3, CCL4, CXCL1, CXCL8 and CXCL10) and Th2 cytokine-induced chemokines (CCL13, CCL18 and CCL22) in the culture supernatant. KEY RESULTS Stimulation of LMs with LPS was associated with increased expression of ALOX15B, whereas stimulation with IL-4/IL-13 induced the expression of ALOX15. PD146176 and ML351 (10 μM) reduced the release of the chemokines induced by LPS and Th2 cytokines. The effects of these 15-LOX inhibitors were maintained in the presence of indomethacin and MK886. Furthermore, indomethacin revealed the inhibitory effect of PD146176 on TNF-α release. CONCLUSIONS AND IMPLICATIONS Inhibition of the 15-LOX pathways is involved in the down-regulation of the in vitro production of chemokines in LMs. Our results suggest that the 15-LOX pathways have a role in the pathogenesis of inflammatory lung disorders and may thus constitute a potential drug target.
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Affiliation(s)
- C Abrial
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France.,UFR Sciences de la santé, Université Versailles Saint Quentin, Saint Quentin en Yvelines, France
| | - S Grassin-Delyle
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France.,UFR Sciences de la santé, Université Versailles Saint Quentin, Saint Quentin en Yvelines, France
| | - H Salvator
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France.,UFR Sciences de la santé, Université Versailles Saint Quentin, Saint Quentin en Yvelines, France
| | - M Brollo
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France
| | - E Naline
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France.,UFR Sciences de la santé, Université Versailles Saint Quentin, Saint Quentin en Yvelines, France
| | - P Devillier
- Laboratoire de Pharmacologie UPRES EA220, Hôpital Foch, Suresnes, France.,UFR Sciences de la santé, Université Versailles Saint Quentin, Saint Quentin en Yvelines, France
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Silencing Nociceptor Neurons Reduces Allergic Airway Inflammation. Neuron 2015; 87:341-54. [PMID: 26119026 DOI: 10.1016/j.neuron.2015.06.007] [Citation(s) in RCA: 291] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 04/16/2015] [Accepted: 06/01/2015] [Indexed: 01/15/2023]
Abstract
Lung nociceptors initiate cough and bronchoconstriction. To elucidate if these fibers also contribute to allergic airway inflammation, we stimulated lung nociceptors with capsaicin and observed increased neuropeptide release and immune cell infiltration. In contrast, ablating Nav1.8(+) sensory neurons or silencing them with QX-314, a charged sodium channel inhibitor that enters via large-pore ion channels to specifically block nociceptors, substantially reduced ovalbumin- or house-dust-mite-induced airway inflammation and bronchial hyperresponsiveness. We also discovered that IL-5, a cytokine produced by activated immune cells, acts directly on nociceptors to induce the release of vasoactive intestinal peptide (VIP). VIP then stimulates CD4(+) and resident innate lymphoid type 2 cells, creating an inflammatory signaling loop that promotes allergic inflammation. Our results indicate that nociceptors amplify pathological adaptive immune responses and that silencing these neurons with QX-314 interrupts this neuro-immune interplay, revealing a potential new therapeutic strategy for asthma.
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Yang L, Lewkowich I, Apsley K, Fritz JM, Wills-Karp M, Weaver TE. Haploinsufficiency for Stard7 is associated with enhanced allergic responses in lung and skin. THE JOURNAL OF IMMUNOLOGY 2015; 194:5635-43. [PMID: 25980009 DOI: 10.4049/jimmunol.1500231] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/19/2015] [Indexed: 11/19/2022]
Abstract
Allergic asthma is a chronic inflammatory disorder that affects ∼20% of the population worldwide. Microarray analyses of nasal epithelial cells from acute asthmatic patients detected a 50% decrease in expression of Stard7, an intracellular phosphatidylcholine transport protein. To determine whether loss of Stard7 expression promotes allergic responses, mice were generated in which one allele of the Stard7 locus was globally disrupted (Stard7 (+/-) mice). OVA sensitization and challenge of Stard7(+/-) mice resulted in a significant increase in pulmonary inflammation, mucous cell metaplasia, airway hyperresponsiveness, and OVA-specific IgE compared with OVA-sensitized/challenged wild-type (WT) mice. This exacerbation was largely Th2-mediated with a significant increase in CD4(+)IL-13(+) T cells and IL-4, IL-5, and IL-13 cytokines. The loss of Stard7 was also associated with increased lung epithelial permeability and activation of proinflammatory dendritic cells in sensitized and/or challenged Stard7 (+/-) mice. Notably, OVA-pulsed dendritic cells from Stard7(+/-) mice were sufficient to confer an exaggerated allergic response in OVA-challenged WT mice, although airway hyperresponsiveness was greater in Stard7(+/-) recipients compared with WT recipients. Enhanced allergic responses in the lung were accompanied by age-dependent development of spontaneous atopic dermatitis. Overall, these data suggest that Stard7 is an important component of a novel protective pathway in tissues exposed to the extracellular environment.
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Affiliation(s)
- Li Yang
- Section of Neonatology, Perinatal and Pulmonary Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229
| | - Ian Lewkowich
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229; and
| | - Karen Apsley
- Section of Neonatology, Perinatal and Pulmonary Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229
| | - Jill M Fritz
- Section of Neonatology, Perinatal and Pulmonary Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229
| | - Marsha Wills-Karp
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205
| | - Timothy E Weaver
- Section of Neonatology, Perinatal and Pulmonary Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229;
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Rayees S, Mabalirajan U, Bhat WW, Rasool S, Rather RA, Panda L, Satti NK, Lattoo SK, Ghosh B, Singh G. Therapeutic effects of R8, a semi-synthetic analogue of Vasicine, on murine model of allergic airway inflammation via STAT6 inhibition. Int Immunopharmacol 2015; 26:246-56. [PMID: 25863236 DOI: 10.1016/j.intimp.2015.03.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/27/2015] [Accepted: 03/27/2015] [Indexed: 11/24/2022]
Abstract
This is a follow-up study of our previous work in which we screened a series of Vasicine analogues for their anti-inflammatory activity in a preventive OVA induced murine model of asthma. The study demonstrated that R8, one of the analogues, significantly suppressed the Th2 cytokine production and eosinophil recruitment to the airways. In the present study, we have been using two standard experimental murine models of asthma, where the mice were treated with R8 either during (preventive use) or after (therapeutic use) the development of asthma features. In the preventive model, R8 reduced inflammatory cell infiltration to the airways, OVA specific IgE and Th2 cytokine production. Also, the R8 treatment in the therapeutic model decreased methacholine induced AHR, Th2 cytokine release, serum IgE levels, infiltration of inflammatory cells into the airways, phosphorylation of STAT6 and expression of GATA3. Moreover, R8 not only reduced goblet cell metaplasia in asthmatic mice but also reduced IL-4 induced Muc5AC gene expression in human alveolar basal epithelial cells. Further, R8 attenuated IL-4 induced differentiation of murine splenocytes into Th2 cells in vitro. So, we may deduce that R8 treatment profoundly reduced asthma features by attenuating the differentiation of T cells into Th2 cells by interfering with the binding of IL-4 to its receptor in turn decreasing the phosphorylation of STAT6 and expression of GATA3 in murine model of asthma. These preclinical findings suggest a possible therapeutic role of R8 in allergic asthma.
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Affiliation(s)
- Sheikh Rayees
- PK-PD Toxicology Division, Indian Institute of Integrative Medicine-CSIR, Jammu, India; School of Biotechnology, Shri Mata Vaishno Devi University, Katra Jammu, India
| | - Ulaganathan Mabalirajan
- Molecular Immunogenetics Laboratory, Institute of genomics and Integrative Biology-CSIR, Delhi, India
| | - Wajid Waheed Bhat
- Biotransformation Group-Industrail Biotechnology, Scion Research, New Zealand
| | - Shafaq Rasool
- School of Biotechnology, Shri Mata Vaishno Devi University, Katra Jammu, India
| | - Rafiq Ahmad Rather
- PK-PD Toxicology Division, Indian Institute of Integrative Medicine-CSIR, Jammu, India
| | - Lipsa Panda
- Molecular Immunogenetics Laboratory, Institute of genomics and Integrative Biology-CSIR, Delhi, India
| | - Naresh Kumar Satti
- Chemistry Division, Indian Institute of Integrative Medicine-CSIR, Jammu, India
| | - Surrinder Kumar Lattoo
- Plant Biotechnology Division, Indian Institute of Integrative Medicine-CSIR, Jammu, India
| | - Balaram Ghosh
- Molecular Immunogenetics Laboratory, Institute of genomics and Integrative Biology-CSIR, Delhi, India
| | - Gurdarshan Singh
- PK-PD Toxicology Division, Indian Institute of Integrative Medicine-CSIR, Jammu, India.
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Preliminary study on pathogenesis of bronchial asthma in children. Pediatr Res 2015; 77:506-10. [PMID: 25585038 DOI: 10.1038/pr.2015.11] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 10/19/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND The etiology and pathogenesis of bronchial asthma remain unclear. This study is to investigate the risk factors related to bronchial asthma onset in children from genetics and immunology and preliminarily reveal the pathogenesis of bronchial asthma in children. METHODS Real-time quantitative PCR was adopted to detect the expression level of TRPV1 gene and mRNA and enzyme-linked immunosorbent assay method to the total immunoglobulin E level and levels of IL-4, IL-5, and IFN-γ in serum in peripheral venous blood for children in two groups. Logistic regression analysis was applied to analyze the most essential factors inducing bronchial asthma in children. RESULTS The mRNA level of TRPV1 in peripheral blood in the case group was higher than that in the control group (P < 0.01). The levels of IL-4, IL-5, and eosinophils in serum in the case group were markedly higher than those in the control group (P < 0.01), while IFN-γ level in the case group was lower than that in the control group (P < 0.01). The results of logistic regression analysis indicated that TRPV1 expression level, IL-4 level, and rs4790522 site mutation were the main risk factors inducing bronchial asthma in children. CONCLUSION The levels of TRPV1 gene expression and Th1/Th2 cytokines have a close relationship with asthma onset in children, which provides theoretical evidences for molecular targeted treatment in children with bronchial asthma.
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Serafino-Agrusa L, Spatafora M, Scichilone N. Asthma and metabolic syndrome: Current knowledge and future perspectives. World J Clin Cases 2015; 3:285-292. [PMID: 25789301 PMCID: PMC4360500 DOI: 10.12998/wjcc.v3.i3.285] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/24/2014] [Accepted: 12/31/2014] [Indexed: 02/05/2023] Open
Abstract
Asthma and obesity are epidemiologically linked; however, similar relationships are also observed with other markers of the metabolic syndrome, such as insulin resistance and dyslipidemia, which cannot be accounted for by increased body mass alone. Obesity appears to be a predisposing factor for the asthma onset, both in adults and in children. In addition, obesity could make asthma more difficult to control and to treat. Although obesity may predispose to increased Th2 inflammation or tendency to atopy, other mechanisms need to be considered, such as those mediated by hyperglycaemia, hyperinsulinemia and dyslipidemia in the context of metabolic syndrome. The mechanisms underlying the association between asthma and metabolic syndrome are yet to be determined. In the past, these two conditions were believed to occur in the same individual without any pathogenetic link. However, the improvement in asthma symptoms following weight reduction indicates a causal relationship. The interplay between these two diseases is probably due to a bidirectional interaction. The purpose of this review is to describe the current knowledge about the possible link between metabolic syndrome and asthma, and explore potential application for future studies and strategic approaches.
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71
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Liu H, Beier JI, Arteel GE, Ramsden CE, Feldstein AE, McClain CJ, Kirpich IA. Transient receptor potential vanilloid 1 gene deficiency ameliorates hepatic injury in a mouse model of chronic binge alcohol-induced alcoholic liver disease. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 185:43-54. [PMID: 25447051 DOI: 10.1016/j.ajpath.2014.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 09/03/2014] [Accepted: 09/09/2014] [Indexed: 12/15/2022]
Abstract
Experimental alcohol-induced liver injury is exacerbated by a high polyunsaturated fat diet rich in linoleic acid. We postulated that bioactive oxidized linoleic acid metabolites (OXLAMs) play a critical role in the development/progression of alcohol-mediated hepatic inflammation and injury. OXLAMs are endogenous ligands for transient receptor potential vanilloid 1 (TRPV1). Herein, we evaluated the role of signaling through TRPV1 in an experimental animal model of alcoholic liver disease (ALD). Chronic binge alcohol administration increased plasma OXLAM levels, specifically 9- and 13-hydroxy-octadecadienoic acids. This effect was associated with up-regulation of hepatic TRPV1. Exposure of hepatocytes to these OXLAMs in vitro resulted in activation of TRPV1 signal transduction with increased intracellular Ca(2+) levels. Genetic depletion of TRPV1 did not blunt hepatic steatosis caused by ethanol, but prevented hepatic injury. TRPV1 deficiency protected from hepatocyte death and prevented the increase in proinflammatory cytokine and chemokine expression, including tumor necrosis factor-α, IL-6, macrophage inflammatory protein-2, and monocyte chemotactic protein 1. TRPV1 depletion markedly blunted ethanol-mediated induction of plasminogen activator inhibitor-1, an important alcohol-induced hepatic inflammation mediator, via fibrin accumulation. This study indicates, for the first time, that TRPV1 receptor pathway may be involved in hepatic inflammatory response in an experimental animal model of ALD. TRPV1-OXLAM interactions appear to play a significant role in hepatic inflammation/injury, further supporting an important role for dietary lipids in ALD.
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Affiliation(s)
- Huilin Liu
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky; College of Food Science and Engineering, Jilin Agricultural University, Changchun, China
| | - Juliane I Beier
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky
| | - Gavin E Arteel
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky
| | - Christopher E Ramsden
- National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland
| | - Ariel E Feldstein
- Department of Pediatrics, University of California San Diego, San Diego, California
| | - Craig J McClain
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky; Division of Gastroenterology, Department of Medicine, Robley Rex Veterans Medical Center, Louisville, Kentucky
| | - Irina A Kirpich
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky.
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Agrawal A, Prakash YS. Obesity, metabolic syndrome, and airway disease: a bioenergetic problem? Immunol Allergy Clin North Am 2014; 34:785-96. [PMID: 25282291 DOI: 10.1016/j.iac.2014.07.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Multiple studies have determined that obesity increases asthma risk or severity. Metabolic changes of obesity, such as diabetes or insulin resistance, are associated with asthma and poorer lung function. Insulin resistance is also found to increase asthma risk independent of body mass. Conversely, asthma is associated with abnormal glucose and lipid metabolism, insulin resistance, and obesity. Here we review our current understanding of how dietary and lifestyle factors lead to changes in mitochondrial metabolism and cellular bioenergetics, inducing various components of the cardiometabolic syndrome and airway disease.
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Affiliation(s)
- Anurag Agrawal
- Molecular Immunogenetics Laboratory and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India.
| | - Y S Prakash
- Department of Anesthesiology, Mayo Clinic, Rochester, MN 55905, USA; Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA.
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Taha AY, Cheon Y, Faurot KF, Macintosh B, Majchrzak-Hong SF, Mann JD, Hibbeln JR, Ringel A, Ramsden CE. Dietary omega-6 fatty acid lowering increases bioavailability of omega-3 polyunsaturated fatty acids in human plasma lipid pools. Prostaglandins Leukot Essent Fatty Acids 2014; 90:151-7. [PMID: 24675168 PMCID: PMC4035030 DOI: 10.1016/j.plefa.2014.02.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 02/03/2014] [Accepted: 02/04/2014] [Indexed: 01/22/2023]
Abstract
BACKGROUND Dietary linoleic acid (LA, 18:2n-6) lowering in rats reduces n-6 polyunsaturated fatty acid (PUFA) plasma concentrations and increases n-3 PUFA (eicosapentaenoic (EPA) and docosahexaenoic acid (DHA)) concentrations. OBJECTIVE To evaluate the extent to which 12 weeks of dietary n-6 PUFA lowering, with or without increased dietary n-3 PUFAs, alters unesterified and esterified plasma n-6 and n-3 PUFA concentrations in subjects with chronic headache. DESIGN Secondary analysis of a randomized trial. Subjects with chronic headache were randomized for 12 weeks to (1) average n-3, low n-6 (L6) diet; or (2) high n-3, low n-6 LA (H3-L6) diet. Esterified and unesterified plasma fatty acids were quantified at baseline (0 weeks) and after 12 weeks on a diet. RESULTS Compared to baseline, the L6 diet reduced esterified plasma LA and increased esterified n-3 PUFA concentrations (nmol/ml), but did not significantly change plasma arachidonic acid (AA, 20:4n-6) concentration. In addition, unesterified EPA concentration was increased significantly among unesterified fatty acids. The H3-L6 diet decreased esterified LA and AA concentrations, and produced more marked increases in esterified and unesterified n-3 PUFA concentrations. CONCLUSION Dietary n-6 PUFA lowering for 12 weeks significantly reduces LA and increases n-3 PUFA concentrations in plasma, without altering plasma AA concentration. A concurrent increase in dietary n-3 PUFAs for 12 weeks further increases n-3 PUFA plasma concentrations and reduces AA.
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Affiliation(s)
- Ameer Y Taha
- Brain Physiology and Metabolism Section, Laboratory of Neuroscience, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
| | - Yewon Cheon
- Brain Physiology and Metabolism Section, Laboratory of Neuroscience, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Keturah F Faurot
- Department of Physical Medicine and Rehabilitation, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Beth Macintosh
- Nutrition Research and Metabolism Core, North Carolina Translational Clinical Sciences Institute, University of North Carolina, Chapel Hill, USA
| | - Sharon F Majchrzak-Hong
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - J Douglas Mann
- Department of Neurology, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Joseph R Hibbeln
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Amit Ringel
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Christopher E Ramsden
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA; Department of Physical Medicine and Rehabilitation, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
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74
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Grace MS, Baxter M, Dubuis E, Birrell MA, Belvisi MG. Transient receptor potential (TRP) channels in the airway: role in airway disease. Br J Pharmacol 2014; 171:2593-607. [PMID: 24286227 PMCID: PMC4009002 DOI: 10.1111/bph.12538] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 11/18/2013] [Indexed: 12/16/2022] Open
Abstract
Over the last few decades, there has been an explosion of scientific publications reporting the many and varied roles of transient receptor potential (TRP) ion channels in physiological and pathological systems throughout the body. The aim of this review is to summarize the existing literature on the role of TRP channels in the lungs and discuss what is known about their function under normal and diseased conditions. The review will focus mainly on the pathogenesis and symptoms of asthma and chronic obstructive pulmonary disease and the role of four members of the TRP family: TRPA1, TRPV1, TRPV4 and TRPM8. We hope that the article will help the reader understand the role of TRP channels in the normal airway and how their function may be changed in the context of respiratory disease.
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Affiliation(s)
- M S Grace
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College LondonLondon, UK
| | - M Baxter
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College LondonLondon, UK
| | - E Dubuis
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College LondonLondon, UK
| | - M A Birrell
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College LondonLondon, UK
| | - M G Belvisi
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College LondonLondon, UK
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75
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Wood KE, Lau A, Mantzioris E, Gibson RA, Ramsden CE, Muhlhausler BS. A low omega-6 polyunsaturated fatty acid (n-6 PUFA) diet increases omega-3 (n-3) long chain PUFA status in plasma phospholipids in humans. Prostaglandins Leukot Essent Fatty Acids 2014; 90:133-8. [PMID: 24456663 PMCID: PMC9398218 DOI: 10.1016/j.plefa.2013.12.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/22/2013] [Accepted: 12/31/2013] [Indexed: 12/25/2022]
Abstract
This study aimed to determine the effect of reducing the dietary linoleic acid (LA) intake from ~5% to <2.5% energy (%E) on n-3 long chain PUFA (LCPUFA) status in humans. Thirty-six participants followed a <2.5%E LA diet for 4 weeks. Nutrient intakes were estimated from diet diaries and blood samples were collected for assessment of fatty acid composition in plasma and erythrocyte phospholipids. LA intakes were reduced from 4.6%E to 2%E during the low LA intervention (P<0.001) while n-3 LCPUFA intakes were unchanged. LA and total n-6 PUFA content of plasma and erythrocyte phospholipids were significantly reduced after the low LA diet phase (P<0.001). The n-3 LCPUFA content of plasma phospholipids was significantly increased after the low LA diet compared to baseline (6.22% vs. 5.53%, P<0.001). These data demonstrate that reducing LA intake for 4 weeks increases n-3 LCPUFA status in humans in the absence of increased n-3 LCPUFA intake.
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Affiliation(s)
- K E Wood
- School of Medicine, Department of Nutrition and Dietetics, Flinders University, Adelaide, SA 5042, Australia; FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - A Lau
- School of Medicine, Department of Nutrition and Dietetics, Flinders University, Adelaide, SA 5042, Australia
| | - E Mantzioris
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia
| | - R A Gibson
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - C E Ramsden
- Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - B S Muhlhausler
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia.
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76
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Kang DW. Synthesis of Glucuronic Acid Conjugates of Linoleic Acid Metabolites. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2013. [DOI: 10.5012/jkcs.2013.57.6.738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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77
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12/15-lipoxygenase expressed in non-epithelial cells causes airway epithelial injury in asthma. Sci Rep 2013; 3:1540. [PMID: 23528921 PMCID: PMC3607899 DOI: 10.1038/srep01540] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 03/08/2013] [Indexed: 01/14/2023] Open
Abstract
The mechanisms underlying asthmatic airway epithelial injury are not clear. 12/15-lipoxygenase (an ortholog of human 15-LOX-1), which is induced by IL-13, is associated with mitochondrial degradation in reticulocytes at physiological conditions. In this study, we showed that 12/15-LOX expressed in nonepithelial cells caused epithelial injury in asthma pathogenesis. While 12/15-LOX overexpression or IL-13 administration to naïve mice showed airway epithelial injury, 12/15-LOX knockout/knockdown in allergic mice reduced airway epithelial injury. The constitutive expression of 15-LOX-1 in bronchial epithelia of normal human lungs further indicated that epithelial 15-LOX-1 may not cause epithelial injury. 12/15-LOX expression is increased in various inflammatory cells in allergic mice. Though non-epithelial cells such as macrophages or fibroblasts released 12/15-LOX metabolites upon IL-13 induction, bronchial epithelia didn't release. Further 12-S-HETE, arachidonic acid metabolite of 12/15-LOX leads to epithelial injury. These findings suggested 12/15-LOX expressed in non-epithelial cells such as macrophages and fibroblasts leads to bronchial epithelial injury.
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78
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Leishangthem GD, Mabalirajan U, Singh VP, Agrawal A, Ghosh B, Dinda AK. Ultrastructural changes of airway in murine models of allergy and diet-induced metabolic syndrome. ISRN ALLERGY 2013; 2013:261297. [PMID: 24106613 PMCID: PMC3782840 DOI: 10.1155/2013/261297] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 07/18/2013] [Indexed: 12/21/2022]
Abstract
Studying ultrastructural changes could reveal novel pathophysiology of obese-asthmatic condition as existing concepts in asthma pathogenesis are based on the histological changes of the diseased airway. While asthma is defined in functional terms, the potential of electron microscopy (EM) in providing cellular and subcellular detail is underutilized. With this view, we have performed transmission EM in the lungs from allergic mice that show key features of asthma and high-fat- or high-fructose-fed mice that mimicked metabolic syndrome to illustrate the ultrastructural changes. The primary focus was epithelial injury and metaplasia, which are cardinal features of asthma and initiate airway remodeling. EM findings of the allergically inflamed mouse lungs correlate with known features of human asthma such as increased mitochondria in airway smooth muscle, platelet activation and subepithelial myofibroblasts. Interestingly, we found a clear and unambiguous evidence to suggest that ciliated cells can become goblet cells using immunoelectron microscopy. Additionally, we show for the first time the stressed mitochondria in the bronchial epithelia of high-fat- or high-fructose-fed mice even without allergen exposure. These results may stimulate interest in using EM in understanding novel pathological mechanisms for different subtypes of asthma including obese asthma.
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Affiliation(s)
- Geeta Devi Leishangthem
- Renal Pathology Laboratory, Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Ulaganathan Mabalirajan
- Molecular Immunogenetics Laboratory and Center for Translational Research in Asthma and Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Delhi 110007, India
| | - Vijay Pal Singh
- Molecular Immunogenetics Laboratory and Center for Translational Research in Asthma and Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Delhi 110007, India
| | - Anurag Agrawal
- Molecular Immunogenetics Laboratory and Center for Translational Research in Asthma and Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Delhi 110007, India
| | - Balaram Ghosh
- Molecular Immunogenetics Laboratory and Center for Translational Research in Asthma and Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Delhi 110007, India
| | - Amit Kumar Dinda
- Renal Pathology Laboratory, Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
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79
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Aravamudan B, Thompson MA, Pabelick CM, Prakash YS. Mitochondria in lung diseases. Expert Rev Respir Med 2013; 7:631-46. [PMID: 23978003 DOI: 10.1586/17476348.2013.834252] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Mitochondria are autonomous cellular organelles that oversee a variety of functions such as metabolism, energy production, calcium buffering and cell fate determination. Regulation of their morphology and diverse activities beyond energy production are being recognized as playing major roles in cellular health and dysfunction. This review is aimed at summarizing what is known regarding mitochondrial contributions to pathogenesis of lung diseases. Emphasis is given to understanding the importance of structural and functional aspects of mitochondria in both normal cellular function (based on knowledge from other cell types) and in development and modulation of lung diseases such as asthma, chronic obstructive pulmonary disease, cystic fibrosis and cancer. Emerging techniques that allow examination of mitochondria, and potential strategies to target mitochondria in the treatment of lung diseases are also discussed.
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Affiliation(s)
- Bharathi Aravamudan
- Departments of Anesthesiology, Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905 USA
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80
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Mabalirajan U, Ghosh B. Mitochondrial dysfunction in metabolic syndrome and asthma. J Allergy (Cairo) 2013; 2013:340476. [PMID: 23840225 PMCID: PMC3687506 DOI: 10.1155/2013/340476] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/21/2013] [Indexed: 01/15/2023] Open
Abstract
Though severe or refractory asthma merely affects less than 10% of asthma population, it consumes significant health resources and contributes significant morbidity and mortality. Severe asthma does not fell in the routine definition of asthma and requires alternative treatment strategies. It has been observed that asthma severity increases with higher body mass index. The obese-asthmatics, in general, have the features of metabolic syndrome and are progressively causing a significant burden for both developed and developing countries thanks to the westernization of the world. As most of the features of metabolic syndrome seem to be originated from central obesity, the underlying mechanisms for metabolic syndrome could help us to understand the pathobiology of obese-asthma condition. While mitochondrial dysfunction is the common factor for most of the risk factors of metabolic syndrome, such as central obesity, dyslipidemia, hypertension, insulin resistance, and type 2 diabetes, the involvement of mitochondria in obese-asthma pathogenesis seems to be important as mitochondrial dysfunction has recently been shown to be involved in airway epithelial injury and asthma pathogenesis. This review discusses current understanding of the overlapping features between metabolic syndrome and asthma in relation to mitochondrial structural and functional alterations with an aim to uncover mechanisms for obese-asthma.
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Affiliation(s)
- Ulaganathan Mabalirajan
- Molecular Immunogenetics Laboratory and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
| | - Balaram Ghosh
- Molecular Immunogenetics Laboratory and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
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81
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Mabalirajan U, Ahmad T, Rehman R, Leishangthem GD, Dinda AK, Agrawal A, Ghosh B, Sharma SK. Baicalein reduces airway injury in allergen and IL-13 induced airway inflammation. PLoS One 2013; 8:e62916. [PMID: 23646158 PMCID: PMC3639905 DOI: 10.1371/journal.pone.0062916] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 03/28/2013] [Indexed: 12/11/2022] Open
Abstract
Background Baicalein, a bioflavone present in the dry roots of Scutellaria baicalensis Georgi, is known to reduce eotaxin production in human fibroblasts. However, there are no reports of its anti-asthma activity or its effect on airway injury. Methodology/Principal Findings In a standard experimental asthma model, male Balb/c mice that were sensitized with ovalbumin (OVA), treated with baicalein (10 mg/kg, ip) or a vehicle control, either during (preventive use) or after OVA challenge (therapeutic use). In an alternate model, baicalein was administered to male Balb/c mice which were given either IL-4 or IL-13 intranasally. Features of asthma were determined by estimating airway hyperresponsiveness (AHR), histopathological changes and biochemical assays of key inflammatory molecules. Airway injury was determined with apoptotic assays, transmission electron microscopy and assessing key mitochondrial functions. Baicalein treatment reduced AHR and inflammation in both experimental models. TGF-β1, sub-epithelial fibrosis and goblet cell metaplasia, were also reduced. Furthermore, baicalein treatment significantly reduced 12/15-LOX activity, features of mitochondrial dysfunctions, and apoptosis of bronchial epithelia. Conclusion/Significance Our findings demonstrate that baicalein can attenuate important features of asthma, possibly through the reduction of airway injury and restoration of mitochondrial function.
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Affiliation(s)
- Ulaganathan Mabalirajan
- Molecular Immunogenetics Laboratory, and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, India.
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82
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Rehman R, Bhat YA, Panda L, Mabalirajan U. TRPV1 inhibition attenuates IL-13 mediated asthma features in mice by reducing airway epithelial injury. Int Immunopharmacol 2013; 15:597-605. [PMID: 23453702 DOI: 10.1016/j.intimp.2013.02.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 02/08/2013] [Accepted: 02/08/2013] [Indexed: 12/19/2022]
Abstract
Even though neurogenic axis is well known in asthma pathogenesis much attention had not been given on this aspect. Recent studies have reported the importance of TRP channels, calcium-permeable ion channels and key molecules in neurogenic axis, in asthma therapeutics. The role of TRPV1 channels has been underestimated in chronic respiratory diseases as TRPV1 knockout mice of C57BL/6 strains did not attenuate the features of these diseases. However, this could be due to strain differences in the distribution of airway capsaicin receptors. Here, we show that TRPV1 inhibition attenuates IL-13 induced asthma features by reducing airway epithelial injury in BALB/c mice. We found that IL-13 increased not only the lung TRPV1 levels but also TRPV1 expression in bronchial epithelia in BALB/c rather than in C57BL/6 mice. TRPV1 knockdown attenuated airway hyperresponsiveness, airway inflammation, goblet cell metaplasia and subepithelial fibrosis induced by IL-13 in BALB/c mice. Further, TRPV1 siRNA treatment reduced not only the cytosolic calpain and mitochondrial calpain 10 activities in the lung but also bronchial epithelial apoptosis indicating that TRPV1 siRNA might have corrected the intracellular and intramitochondrial calcium overload and its consequent apoptosis. Knockdown of IL-13 in allergen induced asthmatic mice reduced TRPV1, cytochrome c, and activities of calpain and caspase 3 in lung cytosol. Thus, these findings suggest that induction of TRPV1 with IL-13 in bronchial epithelia could lead to epithelial injury in in vivo condition. Since TRPV1 expression is correlated with human asthma severity, TRPV1 inhibition could be beneficial in attenuating airway epithelial injury and asthma features.
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Affiliation(s)
- Rakhshinda Rehman
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, India
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