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Zhou D, Ren Y, Zhou Y, Tao X, Liao Y, Yuan C, Lu M, Cui Y. Expression, purification, and activity of novel allergen Tyr p 31 from Tyrophagus putrescentiae. Int J Biol Macromol 2024; 258:128856. [PMID: 38143053 DOI: 10.1016/j.ijbiomac.2023.128856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 12/15/2023] [Indexed: 12/26/2023]
Abstract
Allergen component products, such as recombinant proteins and epitope peptides of allergic components, are used as an adjunct to allergen-specific immunotherapy. We characterized a novel allergen, Tyr p 31, from Tyrophagus putrescentiae, a common allergenic mite. T. putrescentiae total RNA was amplified to Tyr p 31-encoding cDNA, which was inserted into pET28a(+). pET28a(+)-Tyr p 31 was then transformed into Rosetta 2 (DE3) pLysS cells and expressed under isopropyl β-D-thiogalactoside induction. Next, we visualized Tyr p 31 through sodium dodecyl sulfate polyacrylamide gel electrophoresis and Western blotting based on its theoretical molecular weight. Recombinant Tyr p 31 (rTyr p 31) was purified, and its secondary structure was noted to comprise α-helices, antiparallel coils, β-turns, parallel coils, and random coils. Our enzyme-linked immunosorbent assay and Western blotting results for T. putrescentiae-positive sera from children with allergic disorders demonstrated rTyr p 31-specific IgE-positivity rates of 72.41 % and 85.7 %, respectively. In BEAS-2B cells, rTyr p 31 increased IL-6 and IL-8 expression; furthermore, BEAS-2B cells treated with 30 μg/mL rTyr p 31 demonstrated 100 upregulated and 12 downregulated genes. In summary, we identified Tyr p 31, a novel T. putrescentiae allergen component, and noted rTyr p 31 to have a high IgE-binding rate and strong immunogenicity.
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Affiliation(s)
- Dongmei Zhou
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China
| | - Yaning Ren
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China
| | - Ying Zhou
- Department of Pediatrics Laboratory, The Affiliated Children's Hospital of Jiangnan University, Wuxi 214023, PR China
| | - Xuan Tao
- Respiratory Department, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China
| | - Yuanfen Liao
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China
| | - Cunyin Yuan
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China
| | - Meiping Lu
- Department of Otorhinolaryngology & Clinical Allergy Center, The First Affiliated Hospital, Nanjing Medical University, Nanjing, PR China.
| | - Yubao Cui
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, PR China.
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El-Husseini ZW, Vonk JM, van den Berge M, Gosens R, Koppelman GH. Association of asthma genetic variants with asthma-associated traits reveals molecular pathways of eosinophilic asthma. Clin Transl Allergy 2023; 13:e12239. [PMID: 37186423 PMCID: PMC10119226 DOI: 10.1002/clt2.12239] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/11/2023] [Accepted: 03/13/2023] [Indexed: 05/17/2023] Open
Abstract
INTRODUCTION Asthma is a complex, polygenic, heterogenous inflammatory disease. Recently, we generated a list of 128 independent single nucleotide polymorphisms (SNPs) associated with asthma in genome-wide association studies. However, it is unknown if asthma SNPs are associated with specific asthma-associated traits such as high eosinophil counts, atopy, and airway obstruction, revealing molecular endotypes of this disease. Here, we aim to identify the association between asthma SNPs and asthma-associated traits and assess expression quantitative trait locus (e-QTLs) to reveal their downstream functional effects and find drug targets. METHODS Association analyses between 128 asthma SNPs and associated traits (blood eosinophil numbers, atopy, airway obstruction, airway hyperresponsiveness) were conducted using regression modelling in population-based studies (Lifelines N = 32,817/Vlagtwedde-Vlaardingen N = 1554) and an asthma cohort (Dutch Asthma genome-wide association study N = 917). Functional enrichment and pathway analysis were performed with genes linked to the significant SNPs by e-QTL analysis. Genes were investigated to generate novel drug targets. RESULTS We identified 69 asthma SNPs that were associated with at least one trait, with 20 SNPs being associated with multiple traits. The SNP annotated to SMAD3 was the most pleiotropic. In total, 42 SNPs were associated with eosinophil counts, 18 SNPs with airway obstruction, and 21 SNPs with atopy. We identified genetically driven pathways regulating eosinophilia. The largest network of eosinophilia contained two genes (IL4R, TSLP) targeted by drugs currently available for eosinophilic asthma. Several novel targets were identified such as IL-18, CCR4, and calcineurin. CONCLUSION Many asthma SNPs are associated with blood eosinophil counts and genetically driven molecular pathways of asthma-associated traits were identified.
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Affiliation(s)
- Zaid W El-Husseini
- Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's Hospital, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Molecular Pharmacology, Groningen Research Institute of Pharmacy, Groningen, The Netherlands
| | - Judith M Vonk
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Maarten van den Berge
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Reinoud Gosens
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Molecular Pharmacology, Groningen Research Institute of Pharmacy, Groningen, The Netherlands
| | - Gerard H Koppelman
- Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's Hospital, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Kim SS, Kim NK, Seo SR. Cynanchi atrati and Its Phenolic Constituent Sinapic Acid Target Regulator of Calcineurin 1 (RCAN1) to Control Skin Inflammation. Antioxidants (Basel) 2022; 11:antiox11020205. [PMID: 35204088 PMCID: PMC8868251 DOI: 10.3390/antiox11020205] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/15/2022] [Accepted: 01/19/2022] [Indexed: 12/19/2022] Open
Abstract
Atopic dermatitis (AD) is a common inflammatory skin disorder, and numerous pharmacological approaches are employed to reduce symptoms. Natural products of plant-derived materials have been accepted as complementary therapy for the treatment of a wide range of inflammatory diseases. Cynanchi atrati (CA) is an oriental medicinal herb used in the treatment of acute urinary infection, febrile diseases, and laryngopharyngitis. However, the role of CA root extract in skin inflammation such as AD has not been explored yet. In this study, we examined the possible effect of CA root extract on skin inflammation and evaluated the underlying signaling mechanism using in vitro and in vivo modeling systems. Raw264.7 macrophages were used for in vitro experiments, and an oxazolone-induced AD mouse model was used to evaluate in vivo effects. CA extract significantly inhibited the expression levels of lipopolysaccharide (LPS)-induced pro-inflammatory cytokines such as interleukin-6 (IL-6) and interleukin-1β (IL-1β) in RAW264.7 macrophages. The CA root extract mediated suppression of pro-inflammatory cytokine expression and was associated with the decreased nuclear factor kappa B (NF-κB) gene transcriptional activation. Moreover, CA root extract attenuated the in vivo expression of IL-6 and tumor necrosis factor-α (TNF-α) and ear swelling in the AD mouse models. We also observed that the inhibitory effect of CA root extract on skin inflammation was accompanied by the upregulation of calcineurin 1 (RCAN1) expression, which functions in the inflammatory pathways by suppressing NF-κB signaling. We consistently observed that the immunosuppressive effect of CA root extract in AD was significantly perturbed in the RCAN1 knockout mice. In addition, we isolated a phenolic acid compound, sinapic acid (SA), from the CA root extract and found that SA consistently exerted an immunosuppressive effect in RAW264.7 macrophages by inducing RCAN1 expression. Our results provide the first evidence that CA root extract and its phenolic acid constituent, SA, modulate NF-κB signaling pathways by inducing RCAN1 expression in the skin inflammation process. Thus, we suggest that CA root extract has a therapeutic value for the treatment of AD by targeting endogenous immune regulators.
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Affiliation(s)
- Seon Sook Kim
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea;
- Institute of Bioscience & Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | | | - Su Ryeon Seo
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea;
- Institute of Bioscience & Biotechnology, Kangwon National University, Chuncheon 24341, Korea
- Correspondence: ; Tel.: +82-33-250-8541; Fax: +82-33-241-4627
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Kandikattu HK, Venkateshaiah SU, Verma AK, Mishra A. Tacrolimus (FK506) treatment protects allergen-, IL-5- and IL-13-induced mucosal eosinophilia. Immunology 2021; 163:220-235. [PMID: 33512727 DOI: 10.1111/imm.13314] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/16/2020] [Accepted: 01/18/2021] [Indexed: 02/06/2023] Open
Abstract
Eosinophils are a common clinical feature associated with chronic allergic diseases, and elemental diets, systemic steroids, anti-IL-5 and anti-IL-13 treatment have shown some therapeutic promise. Herein, we present evidence that pre- and post-intraperitoneal administration of tacrolimus (FK506) is very effective in reducing CCR3/Siglec-F+ eosinophils in Aspergillus-challenged asthma and EoE, CD2-IL-5 induced global eosinophilia, and DOX regulated IL-13-induced asthma. We used flow cytometry and anti-major basic protein (MBP) immunostaining to examine eosinophils in the spleen, bone marrow, BALF, lung, oesophagus and intestine. Additionally, we also performed ELISA and Western blot analyses to show that tacrolimus treatment also reduces the levels of eosinophil-specific cytokines IL-4, IL-5, IL-13 and TGF-β, eosinophil-specific chemokines Eotaxin-1 and Eotaxin-2, and progenitors of target RCAN1 mRNA and protein levels. Additionally, the current investigations also show that the TGF-β-mediated oesophageal and lung fibrosis is also reduced in Aspergillus-challenged, CD2-IL-5 transgenic and DOX-responsive IL-13 mice. Mechanistically, we show that tacrolimus in vitro treatment inhibited bone marrow-derived eosinophil proliferation and viability by promoting eosinophil apoptosis that may be associated with downregulation of RCAN1. Taken together, we provide in vivo and in vitro evidence that tacrolimus ameliorates eosinophil levels and associated pathogenesis in allergen-, IL-5- and IL-13-induced EoE, EG and asthma pathogenesis. Considering tacrolimus side-effects and reactivity to several other drugs, we propose the topical use of tacrolimus for paediatric and low-dose oral for adult patients as a novel therapeutic strategy for the clinical trial to reduce mucosal eosinophilia first in steroid-refractory or elemental diet non-responsive adult EoE, EG and asthma patients.
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Affiliation(s)
- Hemanth Kumar Kandikattu
- Department of Medicine, Section of Pulmonary Diseases, Tulane Eosinophilic Disorder Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Sathisha Upparahalli Venkateshaiah
- Department of Medicine, Section of Pulmonary Diseases, Tulane Eosinophilic Disorder Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Alok Kumar Verma
- Department of Medicine, Section of Pulmonary Diseases, Tulane Eosinophilic Disorder Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Anil Mishra
- Department of Medicine, Section of Pulmonary Diseases, Tulane Eosinophilic Disorder Center, Tulane University School of Medicine, New Orleans, LA, USA
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Pyrrolidine dithiocarbamate (PDTC) inhibits inflammatory signaling via expression of regulator of calcineurin activity 1 (RCAN1). Biochem Pharmacol 2017; 143:107-117. [DOI: 10.1016/j.bcp.2017.07.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 07/11/2017] [Indexed: 11/20/2022]
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Ballesteros-Martinez C, Mendez-Barbero N, Montalvo-Yuste A, Jensen BM, Gomez-Cardenosa A, Klitfod L, Garrido-Arandia M, Alvarez-Llamas G, Pastor-Vargas C, Vivanco F, Garvey LH, Cuesta-Herranz J, Poulsen LK, Esteban V. Endothelial Regulator of Calcineurin 1 Promotes Barrier Integrity and Modulates Histamine-Induced Barrier Dysfunction in Anaphylaxis. Front Immunol 2017; 8:1323. [PMID: 29104573 PMCID: PMC5655011 DOI: 10.3389/fimmu.2017.01323] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 09/29/2017] [Indexed: 12/21/2022] Open
Abstract
Anaphylaxis, the most serious and life-threatening allergic reaction, produces the release of inflammatory mediators by mast cells and basophils. Regulator of calcineurin 1 (Rcan1) is a negative regulator of mast-cell degranulation. The action of mediators leads to vasodilation and an increase in vascular permeability, causing great loss of intravascular volume in a short time. Nevertheless, the molecular basis remains unexplored on the vascular level. We investigated Rcan1 expression induced by histamine, platelet-activating factor (PAF), and epinephrine in primary human vein (HV)-/artery (HA)-derived endothelial cells (ECs) and human dermal microvascular ECs (HMVEC-D). Vascular permeability was analyzed in vitro in human ECs with forced Rcan1 expression using Transwell migration assays and in vivo using Rcan1 knockout mice. Histamine, but neither PAF nor epinephrine, induced Rcan1-4 mRNA and protein expression in primary HV-ECs, HA-ECs, and HMVEC-D through histamine receptor 1 (H1R). These effects were prevented by pharmacological inhibition of calcineurin with cyclosporine A. Moreover, intravenous histamine administration increased Rcan1 expression in lung tissues of mice undergoing experimental anaphylaxis. Functional in vitro assays showed that overexpression of Rcan1 promotes barrier integrity, suggesting a role played by this molecule in vascular permeability. Consistent with these findings, in vivo models of subcutaneous and intravenous histamine-mediated fluid extravasation showed increased response in skin, aorta, and lungs of Rcan1-deficient mice compared with wild-type animals. These findings reveal that endothelial Rcan1 is synthesized in response to histamine through a calcineurin-sensitive pathway and may reduce barrier breakdown, thus contributing to the strengthening of the endothelium and resistance to anaphylaxis. These new insights underscore its potential role as a regulator of sensitivity to anaphylaxis in humans.
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Affiliation(s)
| | - Nerea Mendez-Barbero
- Department of Vascular Physiopathology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain
| | - Alma Montalvo-Yuste
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain
| | - Bettina M Jensen
- Allergy Clinic, Gentofte Hospital, Copenhagen University Hospital, Hellerup, Denmark
| | | | - Lotte Klitfod
- Surgery Department, Gentofte Hospital, Copenhagen University Hospital, Hellerup, Denmark
| | - María Garrido-Arandia
- Center for Plant Biotechnology and Genomics, Technical University of Madrid, Madrid, Spain
| | - Gloria Alvarez-Llamas
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain
| | - Carlos Pastor-Vargas
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain
| | - Fernando Vivanco
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain
| | - Lene Heise Garvey
- Allergy Clinic, Gentofte Hospital, Copenhagen University Hospital, Hellerup, Denmark
| | - Javier Cuesta-Herranz
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain.,Department of Allergy, Fundación Jiménez Díaz, Madrid, Spain
| | - Lars K Poulsen
- Allergy Clinic, Gentofte Hospital, Copenhagen University Hospital, Hellerup, Denmark
| | - Vanesa Esteban
- Department of Immunology, IIS-Fundación Jiménez Díaz, Autonomous University of Madrid, Madrid, Spain.,Allergy Clinic, Gentofte Hospital, Copenhagen University Hospital, Hellerup, Denmark
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Lei QQ, Hu GQ, Chen W, Yu SX, Qi S, Du CT, Gu JM, Lin TJ, Yang YJ. RCAN1 deficiency protects against Salmonella intestinal infection by modulating JNK activation. Mol Immunol 2016; 77:26-33. [PMID: 27449908 DOI: 10.1016/j.molimm.2016.07.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/23/2016] [Accepted: 07/14/2016] [Indexed: 12/21/2022]
Abstract
OBJECTIVE RCAN1 (regulator of calcineurin 1) has been shown to be involved in various physiological and pathological processes. However, the biological implications of RCAN1 during gastrointestinal tract infection remain unclear. In this study, we tried to determine the role of RCAN1 in acute Salmonella infectious colitis. METHODS Wild type and RCAN1-deficient mice or macrophages were used to characterize the impacts of RCAN1 on intestinal inflammation, inflammatory cytokines production, animal survival, and pathogen clearance following Salmonella challenge. RESULTS Histologic and quantitative assessments showed increased inflammation and elevated proinflammatory cytokines production in RCAN1-deficient mice. The aberrant inflammatory response was recapitulated in primary bone marrow-derived macrophages. In addition, we reveal a novel regulatory role for RCAN1 in the proinflammatory JNK signaling both in vitro and in vivo. Further analysis showed that the increased inflammation in RCAN1-deficient mice contributed to pathogen clearance and host survival. CONCLUSIONS The present study demonstrates that RCAN1 deficiency protects against Salmonella intestinal infection by enhancing proinflammatory JNK signaling.
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Affiliation(s)
- Qian-Qian Lei
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Gui-Qiu Hu
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Wei Chen
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Shui-Xing Yu
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Shuai Qi
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Chong-Tao Du
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Jing-Min Gu
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Tong-Jun Lin
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Yong-Jun Yang
- Key Laboratory of Zoonosis, Ministry of Education, College of Animal Medicine, Jilin University, Changchun 130062, China.
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Regulator of Calcineurin 1 in Periodontal Disease. Mediators Inflamm 2016; 2016:5475821. [PMID: 27403036 PMCID: PMC4925939 DOI: 10.1155/2016/5475821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/20/2016] [Accepted: 05/05/2016] [Indexed: 11/18/2022] Open
Abstract
Nuclear factor of activated T-cells (NFAT) and NF-kB pathway associated processes are involved in the pathogenesis of various inflammatory disorders, for example, periodontal disease. The activation of these pathways is controlled by the regulator of calcineurin 1 (RCAN1). The aim of this study was to elucidate the role of RCAN1 in periodontal disease. Healthy and inflamed periodontal tissues were analyzed by immunohistochemistry and immunofluorescence using specific rabbit polyclonal anti-RCAN1 antibodies. For expression analysis human umbilical vein endothelial cells (HUVEC) were used. HUVEC were incubated for 2 h with Vascular Endothelial Growth Factor (VEGF) or with wild type and laboratory strains of Porphyromonas gingivalis (P. gingivalis). Expression analysis of rcan1 and cox2 was done by real time PCR using specific primers for rcan1.4 and cox2. The expression of rcan1 was found to be significantly suppressed in endothelial cells of chronically inflamed periodontal tissues compared to healthy controls. Rcan1 and cox2 were significantly induced by VEGF and wild type and laboratory P. gingivalis strains. Interestingly, the magnitude of the rcan1 and cox2 induction was strain dependent. The results of this study indicate that RCAN1 is suppressed in endothelial cells of chronically inflamed periodontal tissues. During an acute infection, however, rcan1 seems to be upregulated in endothelial cells, indicating a modulating role in immune homeostasis of periodontal tissues.
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Griseri T, Arnold IC, Pearson C, Krausgruber T, Schiering C, Franchini F, Schulthess J, McKenzie BS, Crocker PR, Powrie F. Granulocyte Macrophage Colony-Stimulating Factor-Activated Eosinophils Promote Interleukin-23 Driven Chronic Colitis. Immunity 2015. [PMID: 26200014 PMCID: PMC4518500 DOI: 10.1016/j.immuni.2015.07.008] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The role of intestinal eosinophils in immune homeostasis is enigmatic and the molecular signals that drive them from protective to tissue damaging are unknown. Most commonly associated with Th2 cell-mediated diseases, we describe a role for eosinophils as crucial effectors of the interleukin-23 (IL-23)-granulocyte macrophage colony-stimulating factor (GM-CSF) axis in colitis. Chronic intestinal inflammation was characterized by increased bone marrow eosinopoiesis and accumulation of activated intestinal eosinophils. IL-5 blockade or eosinophil depletion ameliorated colitis, implicating eosinophils in disease pathogenesis. GM-CSF was a potent activator of eosinophil effector functions and intestinal accumulation, and GM-CSF blockade inhibited chronic colitis. By contrast neutrophil accumulation was GM-CSF independent and dispensable for colitis. In addition to TNF secretion, release of eosinophil peroxidase promoted colitis identifying direct tissue-toxic mechanisms. Thus, eosinophils are key perpetrators of chronic inflammation and tissue damage in IL-23-mediated immune diseases and it suggests the GM-CSF-eosinophil axis as an attractive therapeutic target. GM-CSF synergizes with IL-5 to exacerbate eosinopoiesis during chronic colitis GM-CSF-activated eosinophils promote IL-23 driven colitis Depletion of eosinophils, but not of neutrophils, dampens colitis GM-CSF increases eosinophil production of inflammatory cytokines TNF and IL-13
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Affiliation(s)
- Thibault Griseri
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Isabelle C Arnold
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Claire Pearson
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Thomas Krausgruber
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Chris Schiering
- Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Fanny Franchini
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Julie Schulthess
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Brent S McKenzie
- CSL Ltd. Research Department, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Paul R Crocker
- Division of Cell Signalling and Immunology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Fiona Powrie
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK; Translational Gastroenterology Unit, Experimental Medicine Division Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK.
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Wu Z, Li Y, MacNeil AJ, Junkins RD, Berman JN, Lin TJ. Calcineurin–Rcan1 Interaction Contributes to Stem Cell Factor–Mediated Mast Cell Activation. THE JOURNAL OF IMMUNOLOGY 2013; 191:5885-94. [DOI: 10.4049/jimmunol.1301271] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jain U, Woodruff TM, Stadnyk AW. The C5a receptor antagonist PMX205 ameliorates experimentally induced colitis associated with increased IL-4 and IL-10. Br J Pharmacol 2013; 168:488-501. [PMID: 22924972 DOI: 10.1111/j.1476-5381.2012.02183.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 08/08/2012] [Accepted: 08/10/2012] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND AND PURPOSE Anti-complement therapies have not been advanced for treating the inflammatory bowel diseases (IBDs) despite a growing body of evidence that blocking C5a protects against induced colitis in rodents. The purpose of this study was to further build on this evidence by examining the efficacy, mechanism and specificity of a potent, non-competitive and orally active C5a receptor (CD88) antagonist, PMX205, in the dextran sulphate sodium (DSS) model of murine innate colitis. EXPERIMENTAL APPROACH Mice with DSS added to their drinking water were orally administered 100 or 200 μg day(-1) PMX205 in prophylactic and therapeutic regimens. Clinical illness, colon histology and local generation of inflammatory mediators were measured to evaluate the impact of PMX205 on disease. KEY RESULTS PMX205 significantly prevented DSS-induced colon inflammation in both regimens, associated with lower pro-inflammatory cytokine production and nitrotyrosine staining in colon sections. Additionally, the levels of anti-inflammatory cytokines IL-4 and IL-10 were increased. PMX205 had no significant effect on C5a levels. The beneficial effect of PMX205 was seen in two strains of mice of differing sensitivities to DSS inflammation, but was inactive in mice lacking CD88. CONCLUSIONS AND IMPLICATIONS Pharmacological inhibition of C5a activity by PMX205 is efficacious in preventing DSS-induced colitis, providing further evidence that targeting CD88 in IBD patients could be a valuable therapeutic option.
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Affiliation(s)
- U Jain
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
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Junkins RD, MacNeil AJ, Wu Z, McCormick C, Lin TJ. Regulator of Calcineurin 1 Suppresses Inflammation during Respiratory Tract Infections. THE JOURNAL OF IMMUNOLOGY 2013; 190:5178-86. [DOI: 10.4049/jimmunol.1203196] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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