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Shah D, Ford L, Ochkur S, Kosisky S, Fineman S, Virant F, Rank M. Accuracy of spring pollen forecasts in five U.S. cities using National Allergy Bureau reporting as a gold standard. J Allergy Clin Immunol Pract 2024:S2213-2198(24)00194-6. [PMID: 38423292 DOI: 10.1016/j.jaip.2024.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/06/2024] [Accepted: 02/23/2024] [Indexed: 03/02/2024]
Affiliation(s)
- Divya Shah
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Ariz.
| | - Linda Ford
- The Asthma & Allergy Center, Bellevue, Neb
| | - Sergei Ochkur
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz
| | - Susan Kosisky
- U.S. Army Centralized Allergen Extract Laboratory, U.S. Army Garrison-Forest Glen, Silver Spring, Md
| | | | - Frank Virant
- Seattle Allergy & Asthma Research Institute, Seattle, Wash
| | - Matthew Rank
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Ariz; Division of Pulmonology, Phoenix Children's Hospital, Phoenix, Ariz
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Nazaroff C, LeSuer W, Ochkur S, Doyle A, Wright B, Rank M, Jacobsen E. Type 2 and Type 1 Mouse and Human Eosinophils. J Allergy Clin Immunol 2022. [DOI: 10.1016/j.jaci.2021.12.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Prussin C, Bozik M, Mather J, Archibald D, Dworetzky S, Killingsworth R, Ochkur S, Jacobsen E, Siddiqui S, Busse W. The Oral Eosinophil-lowering Drug Dexpramipexole Improves FEV1 Largely Thorough its Effect on FVC. J Allergy Clin Immunol 2022. [DOI: 10.1016/j.jaci.2021.12.097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ochkur S, Iijima K, Gibson J, Miech J, Molar J, Fraser M, Jacobsen E, Wright B, Kita H, Herckes P, Rank M. Ozone and Nitrogen Oxide enhance the Immunogenicity of Ragweed Pollen. J Allergy Clin Immunol 2022. [DOI: 10.1016/j.jaci.2021.12.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lacy P, Willetts L, Jacobsen E, Condjella R, Zellner K, Ochkur S, Lou H, LeSuer W, Kim J, Protheroe C, Pero R, Lee JJ, Lee NA, Moqbel R. The SNARE VAMP-7 Contributes To Eosinophil Degranulation, In Vivo. J Allergy Clin Immunol 2014. [DOI: 10.1016/j.jaci.2013.12.577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Furuta GT, Kagalwalla AF, Lee JJ, Alumkal P, Maybruck BT, Fillon S, Masterson JC, Ochkur S, Protheroe C, Moore W, Pan Z, Amsden K, Robinson Z, Capocelli K, Mukkada V, Atkins D, Fleischer D, Hosford L, Kwatia MA, Schroeder S, Kelly C, Lovell M, Melin-Aldana H, Ackerman SJ. The oesophageal string test: a novel, minimally invasive method measures mucosal inflammation in eosinophilic oesophagitis. Gut 2013; 62:1395-405. [PMID: 22895393 PMCID: PMC3786608 DOI: 10.1136/gutjnl-2012-303171] [Citation(s) in RCA: 188] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Eosinophil predominant inflammation characterises histological features of eosinophilic oesophagitis (EoE). Endoscopy with biopsy is currently the only method to assess oesophageal mucosal inflammation in EoE. We hypothesised that measurements of luminal eosinophil-derived proteins would correlate with oesophageal mucosal inflammation in children with EoE. DESIGN The Enterotest diagnostic device was used to develop an oesophageal string test (EST) as a minimally invasive clinical device. EST samples and oesophageal mucosal biopsies were obtained from children undergoing upper endoscopy for clinically defined indications. Eosinophil-derived proteins including eosinophil secondary granule proteins (major basic protein-1, eosinophil-derived neurotoxin, eosinophil cationic protein, eosinophil peroxidase) and Charcot-Leyden crystal protein/galectin-10 were measured by ELISA in luminal effluents eluted from ESTs and extracts of mucosal biopsies. RESULTS ESTs were performed in 41 children with active EoE (n=14), EoE in remission (n=8), gastro-oesophageal reflux disease (n=4) and controls with normal oesophagus (n=15). EST measurement of eosinophil-derived protein biomarkers significantly distinguished between children with active EoE, treated EoE in remission, gastro-oesophageal reflux disease and normal oesophagus. Levels of luminal eosinophil-derived proteins in EST samples significantly correlated with peak and mean oesophageal eosinophils/high power field (HPF), eosinophil peroxidase indices and levels of the same eosinophil-derived proteins in extracts of oesophageal biopsies. CONCLUSIONS The presence of eosinophil-derived proteins in luminal secretions is reflective of mucosal inflammation in children with EoE. The EST is a novel, minimally invasive device for measuring oesophageal eosinophilic inflammation in children with EoE.
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Affiliation(s)
- Glenn T Furuta
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
- Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
| | - Amir F Kagalwalla
- Department of Pediatrics, Ann and Robert H Lurie Children's Hospital of Chicago and Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Pediatrics, John H. Stroger Hospital of Cook County, Chicago, Illinois, USA
| | - James J Lee
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, Arizona, USA
| | - Preeth Alumkal
- Departments of Biochemistry and Molecular Genetics, and Medicine, College of Medicine, University of Illinois at Chicago, Illinois, USA
| | - Brian T Maybruck
- Departments of Biochemistry and Molecular Genetics, and Medicine, College of Medicine, University of Illinois at Chicago, Illinois, USA
| | - Sophie Fillon
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Joanne C Masterson
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Sergei Ochkur
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, Arizona, USA
| | - Cheryl Protheroe
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, Arizona, USA
| | - Wendy Moore
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
- Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
| | - Zhaoxing Pan
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Katie Amsden
- Department of Pediatrics, Ann and Robert H Lurie Children's Hospital of Chicago and Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zachary Robinson
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Kelley Capocelli
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Pathology, University of Colorado Denver School of Medicine, Colorado, USA
| | - Vince Mukkada
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Dan Atkins
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
| | - David Fleischer
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
| | - Lindsay Hosford
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Mark A Kwatia
- Departments of Biochemistry and Molecular Genetics, and Medicine, College of Medicine, University of Illinois at Chicago, Illinois, USA
| | - Shauna Schroeder
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Caleb Kelly
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Mucosal Inflammation Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
| | - Mark Lovell
- Department of Pediatrics, Gastrointestinal Eosinophilic Diseases Program, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Pathology, University of Colorado Denver School of Medicine, Colorado, USA
| | - Hector Melin-Aldana
- Department of Pediatrics, Ann and Robert H Lurie Children's Hospital of Chicago and Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Pathology, Ann and Robert H Lurie Children's Hospital of Chicago and Northwestern University, Chicago, Illinois, USA
| | - Steven J Ackerman
- Departments of Biochemistry and Molecular Genetics, and Medicine, College of Medicine, University of Illinois at Chicago, Illinois, USA
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Kim JD, Willetts L, Ochkur S, Srivastava N, Hamburg R, Shayeganpour A, Seabra MC, Lee JJ, Moqbel R, Lacy P. An essential role for Rab27a GTPase in eosinophil exocytosis. J Leukoc Biol 2013; 94:1265-74. [PMID: 23986549 DOI: 10.1189/jlb.0812431] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Eosinophil degranulation has been implicated in inflammatory processes associated with allergic asthma. Rab27a, a Rab-related GTPase, is a regulatory intracellular signaling molecule expressed in human eosinophils. We postulated that Rab27a regulates eosinophil degranulation. We investigated the role of Rab27a in eosinophil degranulation within the context of airway inflammation. Rab27a expression and localization in eosinophils were investigated by using subcellular fractionation combined with Western blot analysis, and the results were confirmed by immunofluorescence analysis of Rab27a and the granule membrane marker CD63. To determine the function of eosinophil Rab27a, we used Ashen mice, a strain of Rab27a-deficient animals. Ashen eosinophils were tested for degranulation in response to PAF and calcium ionophore by measuring released EPX activity. Airway EPX release was also determined by intratracheal injection of eosinophils into mice lacking EPX. Rab27a immunoreactivity colocalized with eosinophil crystalloid granules, as determined by subcellular fractionation and immunofluorescence analysis. PAF induced eosinophil degranulation in correlation with redistribution of Rab27a(+) structures, some of which colocalized with CD63(+) crystalloid granules at the cell membrane. Eosinophils from mice had significantly reduced EPX release compared with normal WT eosinophils, both in vitro and in vivo. In mouse models, Ashen mice demonstrated reduced EPX release in BAL fluid. These findings suggest that Rab27a has a key role in eosinophil degranulation. Furthermore, these findings have implications for Rab27a-dependent eosinophil degranulation in airway inflammation.
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Affiliation(s)
- John Dongil Kim
- 2.559 HMRC, Department of Medicine, University of Alberta, Edmonton, AB, T6G 2S2, Canada.
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Condjella R, Protheroe C, Ochkur S, Zellner K, Colbert D, Scott G, Jacoby D, Fryer A, Lee N, Lee J. Skin histopathology, including a significant itch response, associated chemically-induced contact hypersensitivity reactions in the mouse are, in part, a consequence of skin infiltrating eosinophils (163.16). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.163.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Atopic dermatitis and allergic contact dermatitis are two of the most common skin diseases. In both diseases, eosinophils have been suggested as potential contributors of the pathologies linked with these skin conditions. Our goal was to establish a causative relationship between the inflammatory response of chemically induced contact hypersensitivity and eosinophil-mediated activities. Wild type and eosinophil-less PHIL mice were sensitized and challenged with 2,4-dinitrochlorobenzene (DNFB) or alternatively trimellitic anhydride (TMA). Time lapsed videography was used to capture the number of itching events associated with treatment. Immunohistochemistry for eosinophils and nerves was performed to correlate the effect of dermatitis on innervation and eosinophil accumulation in these mice. Our studies showed that in both the DNFB and TMA models a robust eosinophil infiltrate occurred that was accompanied by copious levels of eosinophil degranulation. More importantly, these studies demonstrated that metrics of inflammation (e.g., induced ear swelling (i.e., thickness)) was reduced in PHIL mice relative to wild type. Our observations were also directly correlative with a loss of nerve growth and branching in PHIL mice. These data implicate eosinophils as contributors to the pathologies linked with chemically-induced contact hypersensitivity, including the induced itch responses associated with these models.
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Affiliation(s)
- Rachel Condjella
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | - Cheryl Protheroe
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | - Sergei Ochkur
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | - Katie Zellner
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | - Dana Colbert
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | | | | | | | - Nancy Lee
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
| | - James Lee
- 1Division of Hematology & Oncology, Mayo Clinic Arizona, Scottsdale, AZ
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Ochkur S, Kim J, Protheroe C, Nair P, Furuta G, Lacy P, Moqbel R, Lee J, Lee N. A novel ELISA for eosinophil peroxidase provides a sensitive high throughput assay for eosinophil degranulation in either mouse or human biological samples (65.29). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.65.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Eosinophils comprise only 1-3% of circulating leukocytes but are often a diagnostic feature associated with a variety of inflammatory and disease states, including parasitic and fungal infections, allergic diseases (e.g., asthma, rhinitis and sensitivities to specific foods), cancer, and transplant rejection. The accurate evaluations of eosinophilia as well as the release of stored eosinophil granule proteins are important for the monitoring disease progression and/or assessing the effectiveness of a given treatment strategy(ies). Despite the availability of detection methods for each of the eosinophil granule proteins logistical difficulties limiting either the assays specificity and/or sensitivity have prevented their extensive use. We have generated unique eosinophil peroxidase specific monoclonal antibodies (EPX-mAb) and a high throughput sandwich ELISA assay as a means of overcoming these difficulties. Our EPX-mAb based ELISA is ~10 times more sensitive than traditional OPD based activity assays and allows detection of EPX in mouse BAL fluid after an acute OVA protocol as well as EPX release from mouse eosinophils stimulated ex vivo. The assay is highly specific and gives no signal in samples from EPX deficient mice even with massive eosinophilia (e.g., EPX deficient IL-5 transgenic mice). More significantly, this assay detects EPX in human tissue extracts and biological fluids and thus represents novel diagnostic assay previously unavailable in clinical settings.
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Affiliation(s)
- Sergei Ochkur
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - John Kim
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
- 4University of Alberta, Edmunton, AB, Canada
| | - Cheryl Protheroe
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | | | | | - Paige Lacy
- 4University of Alberta, Edmunton, AB, Canada
| | | | - James Lee
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Nancy Lee
- 6Mayo Clinic Arizona Division of Hematology & Oncology, Scottsdale, AZ
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Jacobsen E, Taranova A, Ochkur S, Protheroe C, Condjella R, Colbert D, Zellner K, McGarry M, Lee J, Lee N. Tumor growth is attenuated in eosinophil-deficient mouse models (165.41). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.165.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Eosinophil infiltration into tumors has been associated with positive and negative growth human cancers and in mouse models of tumorigenesis. Our previous studies have shown that eosinophils infiltrate tumors and differentially accumulate in the necrotic and capsule regions of tumors. Using various eosinophil-deficient mouse models, we demonstrate that in the absence of eosinophils tumor growth is attenuated. Methods: Tumor growth kinetics were assessed using a B16F10 melanoma subcutaneous cell injection model. Eosinophil chemotaxis was assessed using an ex vivo transwell insert assay system. We compared tumor growth in wild type animals vs. various eosinophil-deficient mouse models that are transgenic line of mice (PHIL) and MBP-/-/EPO-/- double knockout mice that are deficient in eosinophil-specific proteins (major basic protein (MBP) and eosinophil peroxide (EPO)) resulting in a blockade of eosinophilpoiesis. Conclusions: The migration of eosinophils was inhibited through blocking the sphingosine-1-phosphate pathway, suggesting recruitment and accumulation is primarily an inflammatory response. Tumor growth was decreased by ~40-60% in PHIL and in MBP-/-/EPO-/- double knockout mice relative to tumors in wild type animals. In addition, EPO-/- mice, and not MBP-/-mice, replicate this ~40% reduction in tumor size implicating a significant role for EPO in tumor growth kinetics. These data suggest eosinophils respond to inflammatory mediators and mediate augment tumor growth.
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Affiliation(s)
| | - Anna Taranova
- 2University of Texas Hlth. Sci. Center, San Antonio, San Antonio, TX
| | | | | | | | | | | | | | - James Lee
- 1Mayo Clinic Arizona, Scottsdale, AZ
| | - Nancy Lee
- 1Mayo Clinic Arizona, Scottsdale, AZ
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Doyle A, Jacobsen E, Ochkur S, McGarry M, Shim K, Nguyen D, Protheroe C, Colbert D, Dyer K, Rosenberg H, Lee N, Lee J. The expression of the abundant secondary granule proteins MBP-1 and EPO is required for the maturation of eosinophil-lineage committed progenitor cells in the hematopoietic compartments of mice (153.27). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.153.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Eosinophil effector functions have been hypothesized to be mediated in part by the release of proteins stored in the secondary granules of mature cells of this leukocyte lineage. Major basic protein-1 (MBP-1) and eosinophil peroxidase (EPO) comprise the majority of protein in these granules. No role has been speculated for these proteins in eosinophilopoiesis and/or the accumulation of mature cells in circulation. Methods: Eosinophilopoiesis and eosinophil accumulation in the periphery were assessed in single and double knockout (MBP-1-/- and/or EPO-/-) mice. Bone marrow and peripheral blood leukocytes were assessed by IHC, FACS and in vitro cell culture assays. Mice were subjected to an acute OVA protocol assessing induced pulmonary pathologies in each of the strains of granule protein knockout mice. Results: We demonstrate that, unlike the single deficiency of MBP-1 or EPO, the absence of both granule proteins resulted in the loss of peripheral blood eosinophils. IHC assessments of bone marrow and spleen demonstrate that eosinophil lineage commitment occurs in these mice. However, these assessments and FACS studies demonstrated a blockade in the maturation of eosinophil-lineage committed cells. This blockade is not rescued by ex vivo culture or by bone marrow engraftment into wild type recipient mice. Similar to other eosinophil-less mouse models, MBP-1-/-/EPO-/- mice also fail to develop pulmonary inflammation in an OVA protocol.
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Affiliation(s)
- Alfred Doyle
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | | | - Sergei Ochkur
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Michael McGarry
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Kevin Shim
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - David Nguyen
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Cheryl Protheroe
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Dana Colbert
- 2Mayo Clinic Arizona Division of Hematology & Oncology, Scottsdale, AZ
| | - Kimberly Dyer
- 3National Institutes of Health, Eosinophil Biology Section, LAD, NIAID, Bethesda, MD
| | - Helene Rosenberg
- 3National Institutes of Health, Eosinophil Biology Section, LAD, NIAID, Bethesda, MD
| | - Nancy Lee
- 2Mayo Clinic Arizona Division of Hematology & Oncology, Scottsdale, AZ
| | - James Lee
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
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Ochkur S, Protheroe C, Li W, Colbert D, Zellner K, Lee J, Lee N. Cys-leukotrienes mediate lung dysfunction but not histopathologies in an IL-5/Eotaxin-2 double transgenic mouse model of severe asthma (163.13). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.163.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Products of the 5-lipoxygenase (5-LO) pathway (i.e., cys-leukotrienes and LTB4), are contributors to lung inflammation, airway remodeling, and hyperresponsiveness associated with allergic respiratory inflammation. Eosinophils are capable of leukotriene synthesis/secretion and chemotactically respond to these compounds. However, the in vivo role of eosinophils in leukotriene mediated events during asthmatic airway inflammation is not defined. To study the link between eosinophils and leukotrienes we used the I5/E2 double transgenic mouse model of severe asthma, over-expressing IL-5 systemically and eotaxin-2 in airways, in which lung pathologies are entirely dependent on the presence of eosinophils. We show that airway levels of cysteinyl leukotrienes and LTB4 are significantly elevated in I5/E2 mice. Crosses of I5E2 mice with 5-LO knockout animals abolished AHR in the I5/E2 parental model without significant effects on lung histopathology. Administration of a cys-leukotriene receptor antagonist (Montelukast®) to I5/E2 mice replicates the effects of the total leukotriene loss in I5/E2/5-LO-/- animals. In contrast, I5/E2 mice crossed with BLT-1-/- mice which are deficient of the LTB4 receptor fail to display effects on the pulmonary pathologies occurring in the I5/E2 parental model. These data demonstrate a unique role for cys-leukotrienes in the development of AHR independent of lung remodeling events occurring in this transgenic model of severe asthma.
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Affiliation(s)
- Sergei Ochkur
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Cheryl Protheroe
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Wen Li
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
- 3Zhejiang University School of Medicine, Hangzhou, China
| | - Dana Colbert
- 2Mayo Clinic Arizona Division of Hematology and Oncology, Scottsdale, AZ
| | - Katie Zellner
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - James Lee
- 1Mayo Clinic Arizona Division of Pulmonary Medicine, Scottsdale, AZ
| | - Nancy Lee
- 2Mayo Clinic Arizona Division of Hematology and Oncology, Scottsdale, AZ
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Jacobsen E, Ochkur S, Taranova A, Pero R, Protheroe C, Lee J. Eosinophils Modulate the Allergen-Indcued Th2 Pulmonary Immune Microenvironment. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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