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Wang X, Wang Y, Tang T, Zhao G, Dong W, Li Q, Liang X. Curcumin-Loaded RH60/F127 Mixed Micelles: Characterization, Biopharmaceutical Characters and Anti-Inflammatory Modulation of Airway Inflammation. Pharmaceutics 2023; 15:2710. [PMID: 38140051 PMCID: PMC10747166 DOI: 10.3390/pharmaceutics15122710] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/08/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023] Open
Abstract
Curcumin's ability to impact chronic inflammatory conditions, such as metabolic syndrome and arthritis, has been widely researched; however, its poor bioavailability limits its clinical application. The present study is focused on the development of curcumin-loaded polymeric nanomicelles as a drug delivery system with anti-inflammatory effects. Curcumin was loaded in PEG-60 hydrogenated castor oil and puronic F127 mixed nanomicelles (Cur-RH60/F127-MMs). Cur-RH60/F127-MMs was prepared using the thin film dispersion method. The morphology and releasing characteristics of nanomicelles were evaluated. The uptake and permeability of Cur-RH60/F127-MMs were investigated using RAW264.7 and Caco-2 cells, and their bioavailability and in vivo/vitro anti-inflammatory activity were also evaluated. The results showed that Cur-RH60/F127-MMs have regular sphericity, possess an average diameter smaller than 20 nm, and high encapsulation efficiency for curcumin (89.43%). Cur-RH60/F127-MMs significantly increased the cumulative release of curcumin in vitro and uptake by cells (p < 0.01). The oral bioavailability of Cur-RH60/F127-MMs was much higher than that of curcumin-active pharmaceutical ingredients (Cur-API) (about 9.24-fold). The treatment of cell lines with Cur-RH60/F127-MMs exerted a significantly stronger anti-inflammatory effect compared to Cur-API. In addition, Cur-RH60/F127-MMs significantly reduced OVA-induced airway hyperresponsiveness and inflammation in an in vivo experimental asthma model. In conclusion, this study reveals the possibility of formulating a new drug delivery system for curcumin, in particular nanosized micellar aqueous dispersion, which could be considered a perspective platform for the application of curcumin in inflammatory diseases of the airways.
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Affiliation(s)
- Xinli Wang
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (X.W.); (G.Z.); (W.D.); (Q.L.)
- Jiangxi Medical Device Testing Center, Nanchang 330029, China
| | - Yanyan Wang
- Clinical Medical School, Jiangxi University of Chinese Medicine, Nanchang 330004, China;
| | - Tao Tang
- Department of Pharmacy, Ji’an Central People’s Hospital, Ji’an 343000, China;
| | - Guowei Zhao
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (X.W.); (G.Z.); (W.D.); (Q.L.)
| | - Wei Dong
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (X.W.); (G.Z.); (W.D.); (Q.L.)
| | - Qiuxiang Li
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (X.W.); (G.Z.); (W.D.); (Q.L.)
| | - Xinli Liang
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (X.W.); (G.Z.); (W.D.); (Q.L.)
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2
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Gould EN, Szule JA, Wilson-Robles H, Steiner JM, Lennon EM, Tolbert MK. Esomeprazole induces structural changes and apoptosis and alters function of in vitro canine neoplastic mast cells. Vet Immunol Immunopathol 2023; 256:110539. [PMID: 36592548 DOI: 10.1016/j.vetimm.2022.110539] [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: 08/02/2022] [Revised: 12/01/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Histamine-2 receptor antagonists such as famotidine and proton pump inhibitors such as esomeprazole are commonly used in canine MCT disease, but direct effects on dog MCs have not been evaluated. Omeprazole is a proton pump inhibitor which has been demonstrated to cause structural and functional changes to in vitro murine mast cells (MCs). It has not yet been determined if esomeprazole, the commercially available and commonly prescribed S-isomer of omeprazole, has similar effects. Our primary study objective was to evaluate and compare the effects of acid suppressants (esomeprazole and famotidine) on MC ultrastructure, viability, and function in vitro using both healthy and neoplastic MCs. Murine bone marrow derived mast cells (BMMC), human LAD2, and canine C2 and BR cells, were used for these studies, representing a single healthy (i.e., BMMCs) MC model and multiple neoplastic MC models (i.e., LAD2, C2, BR), respectively. The rat basophilic leukemic (RBL-2H3) and canine B cell lymphoma 17-71 cell lines served as granulocytic and agranulocytic control lines for experiments, respectively. The treatment effect of acid suppressants on MC ultrastructure was assessed via both light and transmission electron microscopy. Differences in MC viability was assessed between groups via MTS-based, colorimetric assays and flow cytometry. Degranulation was assessed by quantification of β-hexosaminidase (i.e., LAD2 and RBL-2H3). Esomeprazole-treated MCs of all lines exhibited dramatic time and concentration-dependent alterations in ultrastructure (i.e., increased vacuolization, compromise of cell membrane), increased apoptosis, and altered degranulation responses in comparison to famotidine and vehicle-treated cells. The canine B cell lymphoma cells consistently exhibited either no significant (i.e., cytotoxicity assays) or greatly diminished treatment responses (i.e., apoptosis) compared to MCs. Esomeprazole, but not famotidine, induces significant cytotoxicity, as well as alterations to cell structure and function to multiple lines of in vitro neoplastic MCs. Continued in vitro work investigating the specific mechanisms by which proton pump inhibitors induce these effects, as well as prospective, in vivo work comparing the treatment effects of acid suppressants on canine MCTs, are warranted.
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Affiliation(s)
- Emily N Gould
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA.
| | - Joseph A Szule
- Department of Veterinary Pathobiology, Image Analysis Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4461 TAMU, College Station, TX 77843, USA.
| | - Heather Wilson-Robles
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 408 Raymond Stotzer Parkway, College Station, TX 77845, USA.
| | - Jörg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA.
| | - Elizabeth M Lennon
- Department of Small Animal Clinical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 19104, USA.
| | - M Katherine Tolbert
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA.
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3
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Wang X, Cai J, Liu X, Wang B, Yan L, Liu R, Nie Y, Wang Y, Zhang X, Zhang X. Impact of PM 2.5 and ozone on incidence of influenza in Shijiazhuang, China: a time-series study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:10426-10443. [PMID: 36076137 PMCID: PMC9458314 DOI: 10.1007/s11356-022-22814-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/27/2022] [Indexed: 05/03/2023]
Abstract
Most of the studies are focused on influenza and meteorological factors for influenza. There are still few studies focused on the relationship between pollution factors and influenza, and the results are not consistent. This study conducted distributed lag nonlinear model and attributable risk on the relationship between influenza and pollution factors, aiming to quantify the association and provide a basis for the prevention of influenza and the formulation of relevant policies. Environmental data in Shijiazhuang from 2014 to 2019, as well as the data on hospital-confirmed influenza, were collected. When the concentration of PM2.5 was the highest (621 μg/m3), the relative risk was the highest (RR: 2.39, 95% CI: 1.10-5.17). For extremely high concentration PM2.5 (348 μg/m3), analysis of cumulative lag effect showed statistical significance from cumulative lag0-1 to lag0-6 day, and the minimum cumulative lag effect appeared in lag0-2 (RR: 0.760, 95% CI: 0.655-0.882). In terms of ozone, the RR value was 2.28(1.19,4.38), when O3 concentration was 310 μg/m3, and the RR was 1.65(1.26,2.15), when O3 concentration was 0 μg/m3. The RR of this lag effect increased with the increase of lag days, and reached the maximum at lag0-7 days, RR and 95% CI of slightly low concentration and extremely high concentration were 1.217(1.108,1.337) and 1.440(1.012,2.047), respectively. Stratified analysis showed that there was little difference in gender, but in different age groups, the cumulative lag effect of these two pollutants on influenza was significantly different. Our study found a non-linear relationship between two pollutants and influenza; slightly low concentrations were more associated with contaminant-related influenza. Health workers should encourage patients to get the influenza vaccine and wear masks when going out during flu seasons.
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Affiliation(s)
- Xue Wang
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Jianning Cai
- The Department of Epidemic Treating and Preventing, Center for Disease Prevention and Control of Shijiazhuang City, Shijiazhuang, China
| | - Xuehui Liu
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Binhao Wang
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Lina Yan
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Ran Liu
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Yaxiong Nie
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Yameng Wang
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Xinzhu Zhang
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China
| | - Xiaolin Zhang
- Department of Epidemiology and Statistics, School of Public Health, Hebei Medical University, Hebei Province Key Laboratory of Environment and Human Health, 361 Zhongshan East Road, Shijiazhuang, 050017, China.
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4
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Kasakura K, Kawakami Y, Jacquet A, Kawakami T. Histamine-Releasing Factor Is a Novel Alarmin Induced by House Dust Mite Allergen, Cytokines, and Cell Death. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:1851-1859. [PMID: 36426937 PMCID: PMC9643630 DOI: 10.4049/jimmunol.2200276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 09/07/2022] [Indexed: 12/30/2022]
Abstract
Histamine-releasing factor (HRF) is a multifunctional protein with fundamental intracellular functions controlling cell survival and proliferation. HRF is also secreted during allergic reactions and promotes IgE-mediated activation of mast cells and basophils. In this study, we investigated HRF secretion and its relevance to airway inflammation. HRF monomers were constitutively secreted from BEAS-2B human bronchial epithelial cells (HBECs) and converted to oligomers over the course of culture. Stimulation with house dust mite (HDM) extract increased HRF secretion substantially. Several cytokines involved in asthma pathogenesis showed moderate effects on HRF secretion but dramatically enhanced HDM-induced HRF secretion. HDM-induced HRF secretion from BEAS-2B cells and normal HBECs proceeded via TLR2. Consistent with this, multiple TLR2 ligands, including Der p 2, Der p 5, Der p 13, and Der p 21, induced HRF secretion. Der p 10 (tropomyosin) also promoted HRF secretion. Cell death or incubation with adenosine and ATP, compounds released upon cell death, also enhanced HRF secretion. Furthermore, intranasal administration of recombinant HRF elicited robust airway inflammation in HDM-sensitized mice in an FcεRI-dependent manner. Therefore, we conclude that HRF is a novel alarmin that promotes allergic airway inflammation.
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Affiliation(s)
- Kazumi Kasakura
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Yu Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Alain Jacquet
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, 10330 Bangkok, Thailand
| | - Toshiaki Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
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5
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Kawakami T, Kasakura K, Kawakami Y, Ando T. Immunoglobulin E-Dependent Activation of Immune Cells in Rhinovirus-Induced Asthma Exacerbation. FRONTIERS IN ALLERGY 2022; 3:835748. [PMID: 35386658 PMCID: PMC8974681 DOI: 10.3389/falgy.2022.835748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 01/24/2022] [Indexed: 11/26/2022] Open
Abstract
Acute exacerbation is the major cause of asthma morbidity, mortality, and health-care costs. Respiratory viral infections, particularly rhinovirus (RV) infections, are associated with the majority of asthma exacerbations. The risk for bronchoconstriction with RV is associated with allergic sensitization and type 2 airway inflammation. The efficacy of the humanized anti-IgE monoclonal antibody omalizumab in treating asthma and reducing the frequency and severity of RV-induced asthma exacerbation is well-known. Despite these clinical data, mechanistic details of omalizumab's effects on RV-induced asthma exacerbation have not been well-defined for years due to the lack of appropriate animal models. In this Perspective, we discuss potential IgE-dependent roles of mast cells and dendritic cells in asthma exacerbations.
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Affiliation(s)
- Toshiaki Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, CA, United States
- *Correspondence: Toshiaki Kawakami
| | - Kazumi Kasakura
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
| | - Yu Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
| | - Tomoaki Ando
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
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6
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Yang R, Wang G, Li L, He H, Zheng M, Lu L, Wu S. Tespa1 plays a role in the modulation of airway hyperreactivity through the IL-4/STAT6 pathway. J Transl Med 2020; 18:444. [PMID: 33228696 PMCID: PMC7685668 DOI: 10.1186/s12967-020-02621-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 11/18/2020] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Thymocyte-expressed, positive selection-associated 1 (Tespa1) is a critical signaling molecule in thymocyte development. This study aimed to investigate the regulatory effect of Tespa1 on mast cells in the pathogenesis of asthma and its relationship with the interleukin (IL)-4/signal transducers and activators of transcription 6 (STAT6) signaling pathway. METHODS Tespa1 mRNA expression analysis and IgE levels were carried out using the induced sputum of 33 adults with stable asthma and 36 healthy controls. Tespa1-knockout mice (Tespa1-/-, KO) and C57BL/6 background (wild-type, WT) mice were sensitized and treated with ovalbumin (OVA) to establish an asthma model. Pathological changes, number and activity of mast cells, and changes in activation of the IL-4/STAT6 pathway in lung tissue were detected. The changes of tryptase expression and STAT6 activation after mast cell gene knockout were analyzed in vitro. The changes of enzyme expression and STAT6 activation after mast cell gene knockout were analyzed in vitro. The association between the Tespa1 and p-STAT6 was analyzed by co-immunoprecipitation method. RESULTS Compared with the healthy controls, Tespa1 expression was decreased, and IgE levels were elevated in the sputum of asthmatic patients. Animal experiments showed that Tespa1-/- mice exhibited more severe inflammation, higher quantity of goblet cells and mast cells in the bronchium, and greater expression of mast cell tryptase, which is induced by ovalbumin, than WT mice. And IL-4, IL-13, phospho-Janus kinase 1, and p-STAT6 expressions presented a higher increase in the Tespa1-/- mouse model than in the WT mouse model. Further in vitro studies confirmed that IL-4 could more significantly promote tryptase and p-STAT6 activities in Tespa1-/- mast cells than their WT counterparts. Correlation analysis results showed a negative correlation between Tespa1 and p-STAT6. Co-immunoprecipitation results demonstrated an association between Tespa1 and p-STAT6. CONCLUSIONS Altogether, our results indicate that Tespa1 can negatively regulate mast cell activity, and this event is related to the mast cell IL-4/STAT6 signaling pathway and could be therapeutically exploited to treat asthma attacks.
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Affiliation(s)
- Ruhui Yang
- Department of Pharmacology, College of Medicine and Health, Lishui University, No. 1 Xueyuan Road, Liandu District, Lishui, 323000, China
| | - Guangli Wang
- College of Medicine and Health, Lishui University, No. 1 Xueyuan Road, Liandu District, Lishui, 323000, China
| | - Lingyun Li
- Clinical Laboratory, Lishui People's Hospital, Lishui, 323000, China
| | - Hanjiang He
- College of Medicine and Health, Lishui University, No. 1 Xueyuan Road, Liandu District, Lishui, 323000, China
| | - Mingzhu Zheng
- Program in Molecular and Cellular Biology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Linrong Lu
- Program in Molecular and Cellular Biology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Songquan Wu
- College of Medicine and Health, Lishui University, No. 1 Xueyuan Road, Liandu District, Lishui, 323000, China.
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Msallam R, Balla J, Rathore APS, Kared H, Malleret B, Saron WAA, Liu Z, Hang JW, Dutertre CA, Larbi A, Chan JKY, St. John AL, Ginhoux F. Fetal mast cells mediate postnatal allergic responses dependent on maternal IgE. Science 2020; 370:941-950. [DOI: 10.1126/science.aba0864] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 07/25/2020] [Accepted: 10/20/2020] [Indexed: 12/11/2022]
Abstract
Mast cells (MCs) are central effector cells in allergic reactions that are often mediated by immunoglobulin E (IgE). Allergies commonly start at an early age, and both MCs and IgE are detectable in fetuses. However, the origin of fetal IgE and whether fetal MCs can degranulate in response to IgE-dependent activation are presently unknown. Here, we show that human and mouse fetal MCs phenotypically mature through pregnancy and can be sensitized by maternal IgE. IgE crossed the placenta, dependent on the fetal neonatal Fc receptor (FcRN), and sensitized fetal MCs for allergen-specific degranulation. Both passive and active prenatal sensitization conferred allergen sensitivity, resulting in postnatal skin and airway inflammation after the first allergen encounter. We report a role for MCs within the developing fetus and demonstrate that fetal MCs may contribute to antigen-specific vertical transmission of allergic disease.
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Affiliation(s)
- Rasha Msallam
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
| | - Jozef Balla
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Abhay P. S. Rathore
- Department of Pathology, Duke University Medical Center, Durham, NC 27705, USA
| | - Hassen Kared
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
| | - Benoit Malleret
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Wilfried A. A. Saron
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Zhaoyuan Liu
- Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jing Wen Hang
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Charles Antoine Dutertre
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Anis Larbi
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
| | - Jerry K. Y. Chan
- Department of Reproductive Medicine, KK Women’s and Children’s Hospital, Singapore 229899, Singapore
- Academic Clinical Program of Obstetrics and Gynaecology, Duke-NUS Medical School, Singapore 229899, Singapore
- Experimental Fetal Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Ashley L. St. John
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
- Department of Pathology, Duke University Medical Center, Durham, NC 27705, USA
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
- SingHealth Duke-NUS Global Health Institute, Singapore 169857, Singapore
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), A*STAR, Singapore 138648, Singapore
- Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Translational Immunology Institute, SingHealth/Duke-NUS Academic Medical Centre, The Academia, Singapore 169856, Singapore
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8
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Zhao H, Liu J, Zhu J, Yang F, Wu H, Ba Y, Cui L, Chen R, Chen S. Bacterial composition and community structure of the oropharynx of adults with asthma are associated with environmental factors. Microb Pathog 2020; 149:104505. [PMID: 32979472 DOI: 10.1016/j.micpath.2020.104505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 07/03/2020] [Accepted: 09/16/2020] [Indexed: 12/24/2022]
Abstract
The development and exacerbation of asthma are mainly attributed to inflammatory reactions caused by allergens. However, less is known about the development of asthma caused by microbial disorders in the oropharynx and induced by environmental factors. Here, the metagenome of the oropharyngeal microbiome of adults with asthma was analysed to identify their association with air pollutants. Oropharyngeal swabs from patients with asthma were collected in two winters (W1 and W2) with different environmental factor exposures. The bacterial composition and community structure of the oropharynx were analysed through high-throughput sequencing. After analysis, the α-diversity and β-diversity exhibited significant differences between the two groups. LEfSe analysis detected 8 significantly different phyla and 11 significantly different genera between the W1 and W2 groups. Multiple linear regression analyses found that the asthma status might contribute to the alteration of microbial composition. Redundancy analysis showed that NO2 was the only environmental factor that significantly affected the microbial community structure of the oropharynx. The different genera associated with NO2 were Rothia, Actinomyces, Fusobacterium and Leptotrichia. The altered taxa related to PM2.5 were Cupriavidus and Acinetobacter. Actinobacillus and Prevotella showed a highly positive correlation with O3. Moreover, network analysis was carried out to explore the co-occurrence relationships of the main genera, and PICRUSt was conducted to predict bacterial functions. This study showed that environmental factors might cause alteration in the oropharyngeal flora, which might be a potential risk factor of asthma.
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Affiliation(s)
- Hongcheng Zhao
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China; Qingpu District Center for Disease Control and Prevention, Shanghai, 201799, China
| | - Jia Liu
- The Department of Hematology, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou, 450008, China
| | - Jingyuan Zhu
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Fan Yang
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Huiying Wu
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Yue Ba
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Liuxin Cui
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Ruiying Chen
- The Department of Respiratory and Sleep Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Shuaiyin Chen
- The College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.
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9
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Chen Y, Wu H, Li Y, Liu J, Jia Z, Xu W, Xiao H, Wang W. Aster tataricus attenuates asthma efficiently by simultaneously inhibiting tracheal ring contraction and inflammation. Biomed Pharmacother 2020; 130:110616. [PMID: 32784051 DOI: 10.1016/j.biopha.2020.110616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/29/2020] [Accepted: 08/02/2020] [Indexed: 12/24/2022] Open
Abstract
Asthma is an airway chronic inflammatory disease with significant morbidity, mortality and huge social economic burden. Previous research demonstrated that the root of Aster tataricus (RA) may have the potential to treat asthma, but the efficacy and mechanism were not clear. In this study, preliminary results in vitro showed that Fr-75 eluted from RA extract could not only completely inhibit the tracheal ring contraction raised by KCl in 20 min, but also effectively affect the tracheal ring contraction induced by KCl-, Ach- and His in a concentration-dependent manner (3.91-250 μg/mL). Further results on cells exhibited that Fr-75 could decrease the concentration of intracellular Ca2+ as well. These results revealed the underlying mechanism in vitro that the inhibition of tracheal ring contraction might be due to the decline of the intracellular Ca2+ concentration, which caused by suppressing calcium channel, antagonizing the muscarinic and histamine receptors. Also, results in vivo exhibited that Fr-75 could distinctly ease the symptoms of ovalbumin-sensitized mice, including relieving the pathological injury, increasing the latency to preconvulsive dyspnea and to enhanced pause, reducing the inflammatory cells, chemokines and cytokines in BALF and lung tissue. In general, it could be speculated that RA fraction may attenuate asthma through dilating the tracheal ring contraction and alleviating the lung inflammation simultaneously.
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Affiliation(s)
- Yijun Chen
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China; Beijing Key Laboratory of Syndrome Prescription Basic Research, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Hao Wu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Yueting Li
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Jie Liu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Zhixin Jia
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Wenjuan Xu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Hongbin Xiao
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China; Beijing Key Laboratory of Syndrome Prescription Basic Research, Beijing University of Chinese Medicine, Beijing, 100029, China.
| | - Wei Wang
- Beijing Key Laboratory of Syndrome Prescription Basic Research, Beijing University of Chinese Medicine, Beijing, 100029, China.
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10
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Liu J, Chen E, Zhang Q, Shi P, Gao Y, Chen Y, Liu W, Qin Y, Shen Y, Shi C. The correlation between atmospheric visibility and influenza in Wuxi city, China. Medicine (Baltimore) 2020; 99:e21469. [PMID: 32769879 PMCID: PMC7593054 DOI: 10.1097/md.0000000000021469] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/05/2020] [Accepted: 06/25/2020] [Indexed: 11/25/2022] Open
Abstract
Influenza is an acute respiratory infectious disease that poses a threat to public health. We assessed the association between atmospheric visibility and influenza and influenza-like illness (ILI) in Wuxi city, China.Daily meteorological data, ILI activity, and influenza virus infection rates were collected between 31 December 2012 and 31 December 2017. A distributed lag non-linear model (DLNM) was used to analyze the exposure-lag-response of ILI and influenza activity and daily average visibility.A total of 12,800 cases were detected; 1046 cases (8.17%) were of Flu-A and 527 (4.12%) were of Flu-B infection. Our analysis suggested a non-linear relationship between atmospheric visibility and influenza: U-shaped for ILI, and L-shaped for Flu-A and Flu-B. Comparing low visibility (2.5 km) to ILI cases, the risk appeared between day 1 and day 2. For Flu-A, the risk appeared between days 5 and 9, whereas for Flu-B, the risk effect was much stronger and had a longer reaction delay, staying above zero until day 9. The protective effects of high visibility (14 km) on ILI and Flu-B occurred the same day or one day later. However, we found no association between high visibility and Flu-A.In conclusion, our study contributes novel evidence for the effects of atmospheric visibility on influenza. These findings are important for the development of influenza surveillance and early warning systems in Wuxi city.
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Affiliation(s)
- Juan Liu
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Enpin Chen
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Qi Zhang
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Ping Shi
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Yumeng Gao
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Yujun Chen
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Wendong Liu
- Jiangsu Center for Disease Control and Prevention, Nanjing, Jiangsu, China
| | - Yiran Qin
- Westminster College, Salt Lake City, UT
| | - Yuan Shen
- Wuxi Center for Disease Control and Prevention, Wuxi
| | - Chao Shi
- Wuxi Center for Disease Control and Prevention, Wuxi
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11
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Mohd Isa KN, Hashim Z, Jalaludin J, Lung Than LT, Hashim JH. The Effects of Indoor Pollutants Exposure on Allergy and Lung Inflammation: An Activation State of Neutrophils and Eosinophils in Sputum. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E5413. [PMID: 32731346 PMCID: PMC7432088 DOI: 10.3390/ijerph17155413] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/12/2020] [Accepted: 06/22/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND To explore the inflammation phenotypes following indoor pollutants exposure based on marker expression on eosinophils and neutrophils with the application of chemometric analysis approaches. METHODS A cross-sectional study was undertaken among secondary school students in eight suburban and urban schools in the district of Hulu Langat, Selangor, Malaysia. The survey was completed by 96 students at the age of 14 by using the International Study of Asthma and Allergies in Children (ISAAC) and European Community Respiratory Health Survey (ECRHS) questionnaires. The fractional exhaled nitric oxide (FeNO) was measured, and an allergic skin prick test and sputum induction were performed for all students. Induced sputum samples were analysed for the expression of CD11b, CD35, CD63, and CD66b on eosinophils and neutrophils by flow cytometry. The particulate matter (PM2.5 and PM10), NO2, CO2, and formaldehyde were measured inside the classrooms. RESULTS Chemometric and regression results have clustered the expression of CD63 with PM2.5, CD11b with NO2, CD66b with FeNO levels, and CO2 with eosinophils, with the prediction accuracy of the models being 71.88%, 76.04%, and 76.04%, respectively. Meanwhile, for neutrophils, the CD63 and CD66b clustering with PM2.5 and CD11b with FeNO levels showed a model prediction accuracy of 72.92% and 71.88%, respectively. CONCLUSION The findings indicated that the exposure to PM2.5 and NO2 was likely associated with the degranulation of eosinophils and neutrophils, following the activation mechanisms that led to the inflammatory reactions.
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Affiliation(s)
- Khairul Nizam Mohd Isa
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Serdang 43400, Selangor, Malaysia; (K.N.M.I.); (J.J.)
- Environmental Health Research Cluster (EHRc), Environmental Healthcare Section, Institute of Medical Science Technology, Universiti Kuala Lumpur, Kajang 43000, Selangor, Malaysia
| | - Zailina Hashim
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Serdang 43400, Selangor, Malaysia; (K.N.M.I.); (J.J.)
| | - Juliana Jalaludin
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Serdang 43400, Selangor, Malaysia; (K.N.M.I.); (J.J.)
| | - Leslie Thian Lung Than
- Department of Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Serdang 43400, Selangor, Malaysia;
| | - Jamal Hisham Hashim
- IIGH United Nations University, UKM Medical Centre, Cheras 56000, Kuala Lumpur, Malaysia;
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12
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Shou Q, Lang J, Jin L, Fang M, Cao B, Cai Y, Ni Z, Qiu F, Li C, Cao G, Fu H. Total glucosides of peony improve ovalbumin-induced allergic asthma by inhibiting mast cell degranulation. JOURNAL OF ETHNOPHARMACOLOGY 2019; 244:112136. [PMID: 31377261 DOI: 10.1016/j.jep.2019.112136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/03/2019] [Accepted: 07/31/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Paeonia lactiflora Pall. (peony) is a medicinal plant used in the Xiaoqinglong decoction, a commonly prescribed traditional Chinese medicine for asthma. The main active ingredients of peony roots-described as the total glucosides of peony (TGP)-have anti-inflammatory, immunomodulatory, and protective effects on endothelial cells, and they are known to improve rheumatoid arthritis. This study explored the underlying mechanism of TGP activity in the treatment of allergic asthma. MATERIALS AND METHODS Allergic asthma was induced in BALB/c mice by administering injections of ovalbumin (OVA) mixed with aluminum hydroxide gel and inhaling nebulized OVA. The OVA-sensitized mice were treated with TGP by oral gavage, and the potentially anti-asthmatic treatment effect was studied by testing airway hyperresponsiveness, classifying and counting of leukocytes, performing cytokine assays, and analyzing the lung histopathology. The β-hexosaminidase activity was assayed as a biomarker to evaluate the effect of TGP on mast cell degranulation. The mechanism of TGP was explored by monitoring the Ca2+ influx level in mast cells (RBL-2H3) using a Ca2+ fluorescent probe technique. RESULTS In mice with OVA-induced allergic asthma, TGP reduced airway hyperresponsiveness and improved lung tissue pathology, which included a decrease in inflammatory cell infiltration and collagen deposition. TGP also significantly lowered BALF leukocyte, eosinophil, and neutrophil counts, along with chemokines and cytokines, such as eotaxin, TNF-α, IL-4, and MIP-1α, in serum and lungs of OVA-challenged mice. These effects were further confirmed with the decrease of β-hexosaminidase release and the inhibition of Ca2+ influx in mast cell degranulation. CONCLUSIONS Our findings suggest that TGP improved OVA-induced allergic asthma in mice mainly by suppressing Ca2+ influx-dependent mast cell degranulation.
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Affiliation(s)
- Qiyang Shou
- Second Clinical Medical College/Affiliated Secondary Hospital, Zhejiang Chinese Medical University, Hangzhou, China; School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jiali Lang
- Second Clinical Medical College/Affiliated Secondary Hospital, Zhejiang Chinese Medical University, Hangzhou, China; School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lu Jin
- Second Clinical Medical College/Affiliated Secondary Hospital, Zhejiang Chinese Medical University, Hangzhou, China; School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Mingsun Fang
- Academy of Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Beibei Cao
- Second Clinical Medical College/Affiliated Secondary Hospital, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yueqin Cai
- Academy of Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhunan Ni
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Fengmei Qiu
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Changyu Li
- Academy of Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Gang Cao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China.
| | - Huiying Fu
- Second Clinical Medical College/Affiliated Secondary Hospital, Zhejiang Chinese Medical University, Hangzhou, China.
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13
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A novel electrochemical mast cell-based paper biosensor for the rapid detection of milk allergen casein. Biosens Bioelectron 2019; 130:299-306. [DOI: 10.1016/j.bios.2019.01.050] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 12/11/2022]
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14
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Ye Y, Mo S, Feng W, Ye X, Shu X, Long Y, Guan Y, Huang J, Wang J. The ethanol extract of Involcucrum castaneae ameliorated ovalbumin-induced airway inflammation and smooth muscle thickening in guinea pigs. JOURNAL OF ETHNOPHARMACOLOGY 2019; 230:9-19. [PMID: 30359762 DOI: 10.1016/j.jep.2018.10.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/11/2018] [Accepted: 10/21/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Involucrum castaneae(IC)is used in Chinese folk medicine to treat various lung diseases, as well as for its reducing phlegm and anti-inflammatory properties. AIM OF THE STUDY The purpose of this experiment is to verify the effect of IC on airway inflammation, responsiveness in ovalbumin (OVA)-induced asthmatic guinea pigs. The main chemical components of IC were also analyzed. MATERIALS AND METHODS The potential of the ethanol extract of Involucrum castaneae (EEIC) to protect against OVA-induced allergic airway response in guinea pigs was investigated. The latency of asthma in guinea pigs were recorded after the allergic asthma induced. Enzyme-linked immunosorbent assay (ELISA) was used to measure the levels of immunoglobulin E (IgE), interleukin-5 (IL-5), nerve growth factor (NGF) and interferon-γ (IFN-γ) in asthma allergy. Reverse transcription-PCR (RT-PCR) was used to detect the expression of IL-5 mRNA in asthmatic guinea pig lungs. Paraffin sections of lung tissue were used to analyze pathological changes. The total flavonoid content was determined and the chemical components were analyzed by LC-MS/MS. RESULTS It was found that EEIC was able to reduce the number of eosinophil (EOS) in bronchoalveolar lavage fluid (BALF) and peripheral blood (PB) in the guinea pig model of OVA -induced asthma. Meanwhile, it also significantly reduced the levels of inflammation-related factors IgE and IL-5, decreased the expression of IL-5 mRNA in lung tissue, and increased the level of IFN-γ. Pathological examination of paraffin section of lung tissue showed that EEIC can reduce the thickening of bronchial smooth muscle and reduce the infiltration damage of tissues by various inflammatory cells. The presence of flavonoids, terpenoids and phenolic compounds in EEIC might be responsible for these activities. CONCLUSION IC alleviated airway inflammation and smooth muscle thickening in guinea pigs with OVA-sensitized allergic asthma. The paper explains the traditional efficacy and material basis of IC and lays a foundation for further development.
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Affiliation(s)
- Yujie Ye
- The Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan 430065, PR China
| | - Shuyuan Mo
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China
| | - Wenya Feng
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China
| | - Xiaochun Ye
- Department of Pharmacy, the First Hospital of Wuhan, Wuhan 430022, PR China
| | - Xiang Shu
- Department of Pharmacy, the First Hospital of Wuhan, Wuhan 430022, PR China
| | - Yuxi Long
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China
| | - Yeli Guan
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China
| | - Jiangeng Huang
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China
| | - Jianping Wang
- College of Pharmacy, Huazhong University of Science and Technology, 13# Hangkong Road, Wuhan 430030, PR China.
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15
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Jin Y, Zhu M, Guo Y, Foreman D, Feng F, Duan G, Wu W, Zhang W. Fine particulate matter (PM 2.5) enhances FcεRI-mediated signaling and mast cell function. Cell Signal 2019; 57:102-109. [PMID: 30707930 DOI: 10.1016/j.cellsig.2019.01.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 01/20/2019] [Accepted: 01/28/2019] [Indexed: 12/30/2022]
Abstract
Persistent exposure to ambient fine particulate matter (PM2.5) can exacerbate allergic diseases in humans. Mast cells play an important role in allergic inflammation in peripheral tissues, such as skin, mucosa, and lung. Engagement of the high-affinity Fc receptor leads to mast cell degranulation, releasing a variety of highly active mediators including histamine, leukotrienes, and inflammatory cytokines. How PM2.5 exposure affects mast cell activation and function remains largely unknown. To characterize the effect of PM2.5 on mast cells, we used bone marrow-derived mast cells (BMMCs) to examine whether PM2.5 affected FcεRI-mediated signaling, cytokine production, and degranulation. Exposure to high doses of PM2.5 caused pronounced apoptosis and death of BMMCs. In contrast, exposure to low doses of PM2.5 enhanced mast cell degranulation and FcεRI-mediated cytokine production. Further analysis showed that PM2.5 treatment increased Syk activation and subsequently phosphorylation of its substrates including LAT, PLC-γ1, and SLP-76. Moreover, PM2.5 treatment led to activation of the PI3K and MAPK pathways. Intriguingly, water-soluble fraction of PM2.5 were found responsible for the enhancement of FcεRI-mediated signaling, mast cell degranulation, and cytokine production. Our data suggest that PM2.5, mainly water-soluble fraction of PM2.5, could affect mast cell activation through enhancing FcεRI-mediated signaling.
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Affiliation(s)
- Yuefei Jin
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China; Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA
| | - Minghua Zhu
- Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA
| | - Yanli Guo
- Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA
| | - Daniel Foreman
- Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA
| | - Feifei Feng
- Department of Toxicology, College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Guangcai Duan
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
| | - Weidong Wu
- Department of Occupational and Environmental Health, School of Public Health, Xinxiang Medical University, Xinxiang 453003, People's Republic of China..
| | - Weiguo Zhang
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China; Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA.
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16
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Vargas JE, Kubesch N, Hernandéz-Ferrer C, Carrasco-Turigas G, Bustamante M, Nieuwenhuijsen M, González JR. A systemic approach to identify signaling pathways activated during short-term exposure to traffic-related urban air pollution from human blood. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:29572-29583. [PMID: 30141164 DOI: 10.1007/s11356-018-3009-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
The molecular mechanisms that promote pathologic alterations in human physiology mediated by short-term exposure to traffic pollutants remains not well understood. This work was to develop mechanistic networks to determine which specific pathways are activated by real-world exposures of traffic-related air pollution (TRAP) during rest and moderate physical activity (PA). A controlled crossover study to compare whole blood gene expression pre and post short-term exposure to high and low of TRAP was performed together with systems biology analysis. Twenty-eight healthy volunteers aged between 21 and 53 years were recruited. These subjects were exposed during 2 h to different pollution levels (high and low TRAP levels), while either cycling or resting. Global transcriptome profile of each condition was performed from human whole blood samples. Microarrays analysis was performed to obtain differential expressed genes (DEG) to be used as initial input for GeneMANIA software to obtain protein-protein (PPI) networks. Two networks were found reflecting high or low TRAP levels, which shared only 5.6 and 15.5% of its nodes, suggesting specific cell signaling pathways being activated in each environmental condition. However, gene ontology analysis of each PPI network suggests that each level of TRAP regulate common members of NF-κB signaling pathway. Our work provides the first approach describing mechanistic networks to understand TRAP effects on a system level.
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Affiliation(s)
- José Eduardo Vargas
- Passo Fundo University (UPF), Passo Fundo, Rio Grande do Sul, Brazil.
- Infant Center, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil.
| | - Nadine Kubesch
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centre for Epidemiology and Screening, University of Copenhagen, Copenhagen, Denmark
| | - Carles Hernandéz-Ferrer
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Boston Children's Hospital, Boston, USA
| | - Glória Carrasco-Turigas
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Mariona Bustamante
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Mark Nieuwenhuijsen
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud, Pública (CIBERESP), Barcelona, Spain
| | - Juan R González
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Epidemiología y Salud, Pública (CIBERESP), Barcelona, Spain.
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17
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Mast Cells Exert Anti-Inflammatory Effects in an IL10 -/- Model of Spontaneous Colitis. Mediators Inflamm 2018; 2018:7817360. [PMID: 29849494 PMCID: PMC5932457 DOI: 10.1155/2018/7817360] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 02/27/2018] [Accepted: 03/04/2018] [Indexed: 12/14/2022] Open
Abstract
Mast cells are well established as divergent modulators of inflammation and immunosuppression, but their role in inflammatory bowel disease (IBD) remains to be fully defined. While previous studies have demonstrated a proinflammatory role for mast cells in acute models of chemical colitis, more recent investigations have shown that mast cell deficiency can exacerbate inflammation in spontaneous colitis models, thus suggesting a potential anti-inflammatory role of mast cells in IBD. Here, we tested the hypothesis that in chronic, spontaneous colitis, mast cells are protective. We compared colitis and intestinal barrier function in IL10−/− mice to mast cell deficient/IL10−/− (double knockout (DKO): KitWsh/Wsh × IL10−/−) mice. Compared with IL10−/− mice, DKO mice exhibited more severe colitis as assessed by increased colitis scores, mucosal hypertrophy, intestinal permeability, and colonic cytokine production. PCR array analyses demonstrated enhanced expression of numerous cytokine and chemokine genes and downregulation of anti-inflammatory genes (e.g., Tgfb2, Bmp2, Bmp4, Bmp6, and Bmp7) in the colonic mucosa of DKO mice. Systemic reconstitution of DKO mice with bone marrow-derived mast cells resulted in significant amelioration of IL10−/−-mediated colitis and intestinal barrier injury. Together, the results presented here demonstrate that mast cells exert anti-inflammatory properties in an established model of chronic, spontaneous IBD. Given the previously established proinflammatory role of mast cells in acute chemical colitis models, the present findings provide new insight into the divergent roles of mast cells in modulating inflammation during different stages of colitis. Further investigation of the mechanism of the anti-inflammatory role of the mast cells may elucidate novel therapies.
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18
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Chan EAW, Buckley B, Farraj AK, Thompson LC. The heart as an extravascular target of endothelin-1 in particulate matter-induced cardiac dysfunction. Pharmacol Ther 2016; 165:63-78. [PMID: 27222357 PMCID: PMC6390286 DOI: 10.1016/j.pharmthera.2016.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Exposure to particulate matter air pollution has been causally linked to cardiovascular disease in humans. Several broad and overlapping hypotheses describing the biological mechanisms by which particulate matter exposure leads to cardiovascular disease have been explored, although linkage with specific factors or genes remains limited. These hypotheses may or may not also lead to particulate matter-induced cardiac dysfunction. Evidence pointing to autocrine/paracrine signaling systems as modulators of cardiac dysfunction has increased interest in the emerging role of endothelins as mediators of cardiac function following particulate matter exposure. Endothelin-1, a well-described small peptide expressed in the pulmonary and cardiovascular systems, is best known for its ability to constrict blood vessels, although it can also induce extravascular effects. Research on the role of endothelins in the context of air pollution has largely focused on vascular effects, with limited investigation of responses resulting from the direct effects of endothelins on cardiac tissue. This represents a significant knowledge gap in air pollution health effects research, given the abundance of endothelin receptors found on cardiac tissue and the ability of endothelin-1 to modulate cardiac contractility, heart rate, and rhythm. The plausibility of endothelin-1 as a mediator of particulate matter-induced cardiac dysfunction is further supported by the therapeutic utility of certain endothelin receptor antagonists. The present review examines the possibility that endothelin-1 release caused by exposure to PM directly modulates extravascular effects on the heart, deleteriously altering cardiac function.
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Affiliation(s)
- Elizabeth A W Chan
- Oak Ridge Institute for Science and Education (ORISE) Fellow at the National Center for Environmental Assessment, U.S. Environmental Protection Agency (EPA), Research Triangle Park, NC, USA
| | - Barbara Buckley
- National Center for Environmental Assessment, U.S. EPA, Research Triangle Park, NC, USA
| | - Aimen K Farraj
- Environmental Public Health Division, U.S. EPA, Research Triangle Park, NC, USA
| | - Leslie C Thompson
- Environmental Public Health Division, U.S. EPA, Research Triangle Park, NC, USA.
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19
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Huang L, Zhou L, Chen J, Chen K, Liu Y, Chen X, Tang F. Acute effects of air pollution on influenza-like illness in Nanjing, China: A population-based study. CHEMOSPHERE 2016; 147:180-7. [PMID: 26766354 DOI: 10.1016/j.chemosphere.2015.12.082] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/21/2015] [Accepted: 12/22/2015] [Indexed: 05/19/2023]
Abstract
Influenza-like illness causes substantial morbidity and mortality. Air pollution has already been linked to many health issues, and increasing evidence in recent years supports an association between air pollution and respiratory infections. It is a pioneer study in China to quantify the effects of air pollution on influenza-like illness. This study used wavelet coherence analysis and generalized additive models to explore the potential association between air pollution (including particulate matter with aerodynamic diameter ≦2.5 μm (PM2.5), particulate matter with aerodynamic diameter ≦10 μm (PM10) and nitrogen dioxide (NO2)) and influenza-like illness (a total of 59860 cases) in Nanjing, China from January 1, 2013 to December 31, 2013. The average concentrations of PM2.5, PM10 and NO2 were 77.37 μg/m(3), 135.20 μg/m(3) and 55.80 μg/m(3). An interquartile range increase in PM2.5 concentration was associated with a 2.99% (95% confidence interval (CI): 1.64%, 4.36%) increase in daily influenza-like cases on the same day, while the corresponding increase in NO2 was associated with a 3.77% (95% CI: 2.01%, 5.56%) increase in daily cases. People aged 0-4 were proved to be significantly susceptible to PM10 and NO2; 5-14 ages were significantly susceptible to PM2.5 and PM10; and 15-24 ages were significantly susceptible to all the analyzed air pollutants. Air pollution effects tended to be null or negative for patients aged over 25, which might be due to the small number of influenza-like cases in this age group. This study can be useful for understanding the adverse health effects of air pollution and the cause of influenza-like illness.
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Affiliation(s)
- Lei Huang
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Lian Zhou
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, China
| | - Jin Chen
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Kai Chen
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Yang Liu
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Xiaodong Chen
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, China.
| | - Fenyang Tang
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, China.
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20
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O'Brien TF, Bao K, Dell'Aringa M, Ang WXG, Abraham S, Reinhardt RL. Cytokine expression by invariant natural killer T cells is tightly regulated throughout development and settings of type-2 inflammation. Mucosal Immunol 2016; 9:597-609. [PMID: 26349658 PMCID: PMC4785102 DOI: 10.1038/mi.2015.78] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 07/22/2015] [Indexed: 02/04/2023]
Abstract
Invariant natural killer T (iNKT) cells produce cytokines interleukin-4 (IL-4) and IL-13 during type-2 inflammatory responses. However, the nature in which iNKT cells acquire type-2 cytokine competency and the precise contribution of iNKT cell-derived IL-4 and IL-13 in vivo remains unclear. Using IL-13-reporter mice to fate-map cytokine-expressing cells in vivo, this study reveals that thymic iNKT cells express IL-13 early during development, and this IL-13-expressing intermediate gives rise to mature iNKT1, iNKT2, and iNKT17 subsets. IL-4 and IL-13 reporter mice also reveal that effector iNKT2 cells produce IL-4 but little IL-13 in settings of type-2 inflammation. The preferential production of IL-4 over IL-13 in iNKT2 cells results in part from their reduced GATA-3 expression. In summary, this work helps integrate current models of iNKT cell development, and further establishes non-coordinate production of IL-4 and IL-13 as the predominant pattern of type-2 cytokine expression among innate cells in vivo.
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Affiliation(s)
- T F O'Brien
- grid.189509.c0000000100241216Department of Immunology, Duke University Medical Center, Durham, North Carolina USA
| | - K Bao
- grid.189509.c0000000100241216Department of Immunology, Duke University Medical Center, Durham, North Carolina USA
| | - M Dell'Aringa
- grid.189509.c0000000100241216Department of Immunology, Duke University Medical Center, Durham, North Carolina USA
| | - W X G Ang
- grid.189509.c0000000100241216Department of Pathology, Duke University Medical Center, Durham, North Carolina USA
| | - S Abraham
- grid.189509.c0000000100241216Department of Pathology, Duke University Medical Center, Durham, North Carolina USA
| | - R L Reinhardt
- grid.189509.c0000000100241216Department of Immunology, Duke University Medical Center, Durham, North Carolina USA
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21
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Chu PY, Sun HL, Ko JL, Ku MS, Lin LJ, Lee YT, Liao PF, Pan HH, Lu HL, Lue KH. Oral fungal immunomodulatory protein-Flammulina velutipes has influence on pulmonary inflammatory process and potential treatment for allergic airway disease: A mouse model. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2015; 50:297-306. [PMID: 26427878 DOI: 10.1016/j.jmii.2015.07.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 06/30/2015] [Accepted: 07/23/2015] [Indexed: 01/22/2023]
Abstract
BACKGROUND/PURPOSE House dust mite (HDM) is well known as one of the major indoor allergens that trigger allergic inflammation, especially asthma, and accounts for 85% of all cases. So far, asthma has been thought of as a condition of imbalance between T helper (Th)1 and Th2. Fungal immunomodulatory protein-Flammulina velutipes (FIP-fve) has been seemingly demonstrated to modulate the response to Th1 cytokine production. The aim of this study was to investigate if the oral administration of FIP-fve can inhibit HDM-induced asthma inflammation in the mouse model. METHODS We divided the mice (female BALB/c, 4-6 weeks) into four groups: the prevention group, which consisted of mice sensitized by HDM (intraperitoneally on Day 1, Day 7, and Day 14, and intranasally on Day 14, Day 17, Day 21, Day 24, and Day 27) fed with FIP-fve from Day 1 to Day 14; the treatment group, which comprised mice that received treatment from Day 14 to Day 28; the positive control (PC, sensitized by HDM fed without FIP-fve) group; and the negative control group (NC, nonsensitized). Airway hyperresponsiveness induced by methacholine challenge was determined using whole-body barometric plethysmography. In addition, cytokines were analyzed from bronchoalveolar lavage fluid and serum. Histopathological studies and Liu's staining method in mice lungs were also performed. RESULTS The results showed that both pre- and posttreated FIP-fve groups had significantly reduced airway hyperresponsiveness compared with the PC group after methacholine challenge. In addition, a significantly decreased level of HDM-specific immunoglobulin E in serum and decreased production of Th2 cytokines in bronchoalveolar lavage fluid and serum were observed in these two FIP-fve fed groups. Moreover, more decreased amounts of infiltrating inflammatory cells were present in the lungs of FIP-fve fed groups than those of the PC group. CONCLUSION Oral FIP-fve had an anti-inflammatory effect on the acute phase of the airway inflammatory process induced by HDM in the mouse model and might have a potentially therapeutic role for allergic airway diseases.
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Affiliation(s)
- Po-Yu Chu
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC; Department of Pediatrics, Ministry of Health and Welfare Feng-Yuan Hospital, Taichung, Taiwan, ROC
| | - Hai-Lun Sun
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC; Institute of Medicine, Chung-Shan Medical University, Taichung, Taiwan, ROC
| | - Jiunn-Liang Ko
- Institute of Medicine, Chung-Shan Medical University, Taichung, Taiwan, ROC
| | - Min-Sho Ku
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC
| | - Ling-Jun Lin
- Institute of Microbiology and Immunology, Chung-Shan Medical University, Taichung, Taiwan, ROC
| | - Yu-Tzu Lee
- Institute of Medicine, Chung-Shan Medical University, Taichung, Taiwan, ROC
| | - Pei-Fen Liao
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC
| | - Hui-Hsien Pan
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC
| | - Hsueh-Lin Lu
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC
| | - Ko-Huang Lue
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung, Taiwan, ROC; Institute of Medicine, Chung-Shan Medical University, Taichung, Taiwan, ROC; School of Medicine, Chung-Shan Medical University, Taichung, Taiwan, ROC.
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22
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Syenina A, Jagaraj CJ, Aman SAB, Sridharan A, St John AL. Dengue vascular leakage is augmented by mast cell degranulation mediated by immunoglobulin Fcγ receptors. eLife 2015; 4. [PMID: 25783751 PMCID: PMC4362203 DOI: 10.7554/elife.05291] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 02/23/2015] [Indexed: 12/27/2022] Open
Abstract
Dengue virus (DENV) is the most significant human arboviral pathogen and causes ∼400 million infections in humans each year. In previous work, we observed that mast cells (MC) mediate vascular leakage during DENV infection in mice and that levels of MC activation are correlated with disease severity in human DENV patients (St John et al., 2013b). A major risk factor for developing severe dengue is secondary infection with a heterologous serotype. The dominant theory explaining increased severity during secondary DENV infection is that cross-reactive but non-neutralizing antibodies promote uptake of virus and allow enhanced replication. Here, we define another mechanism, dependent on FcγR-mediated enhanced degranulation responses by MCs. Antibody-dependent mast cell activation constitutes a novel mechanism to explain enhanced vascular leakage during secondary DENV infection.
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Affiliation(s)
- Ayesa Syenina
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore, Singapore
| | - Cyril J Jagaraj
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore, Singapore
| | - Siti A B Aman
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore, Singapore
| | - Aishwarya Sridharan
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore, Singapore
| | - Ashley L St John
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore, Singapore
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23
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Li P, Cui Y, Song G, Wang Z, Zhang Q. Phenotypic characteristics of nasal mast cells in a mouse model of allergic rhinitis. ORL J Otorhinolaryngol Relat Spec 2014; 76:303-13. [PMID: 25531303 DOI: 10.1159/000369142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 10/15/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Mast cells (MCs) in the nasal respiratory mucosa (NRM) play a triggering role in the pathogenesis of allergic rhinitis (AR). Recent research evidence in mouse models of AR suggests an underlying MC-related allergic response in mouse nasal olfactory mucosa (NOM). OBJECTIVE We sought to investigate the phenotypic characteristics of nasal MCs in a mouse model of AR. METHODS By MC-specific staining and immunohistochemistry, we analyzed the subset, protease and IgE-binding phenotypes of nasal MCs in ovalbumin (OVA)-sensitized unchallenged and challenged mice. RESULTS In OVA-sensitized challenged mice, increased serum OVA-specific IgE levels (p < 0.001) and eosinophil infiltration confirmed AR induction. In addition to constitutive connective tissue MCs, mucosal MCs were induced in NRM and NOM of OVA-sensitized challenged mice. Connective tissue MCs and mucosal MCs in mouse NRM and NOM were positive for mouse MC protease-1, -4, -5, -6, -7 and carboxypeptidase-A3. In line with MCs in NRM, there were increased numbers (p = 0.019) and proportions (p = 0.027) of MCs with surface-bound IgE in NOM of OVA-sensitized challenged mice. CONCLUSION In the setting of AR, MCs in mouse NOM exhibit the same subset, protease and IgE-binding phenotypes as MCs in mouse NRM.
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Affiliation(s)
- Pu Li
- Department of Otolaryngology Head and Neck Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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24
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Liang Y, Fang L, Pan H, Zhang K, Kan H, Brook JR, Sun Q. PM2.5 in Beijing - temporal pattern and its association with influenza. Environ Health 2014; 13:102. [PMID: 25471661 PMCID: PMC4271358 DOI: 10.1186/1476-069x-13-102] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 11/30/2014] [Indexed: 05/19/2023]
Abstract
BACKGROUND Air pollution in Beijing, especially PM2.5, has received increasing attention in the past years. Despite Beijing being one of the most polluted cities in the world, there has still been a lack of quantitative research regarding the health impact of PM2.5 on the impact of diseases in Beijing. In this study, we aimed to characterize temporal pattern of PM2.5 and its potential association with human influenza in Beijing. METHODS Based on the data collected on hourly ambient PM2.5 from year 2008 to 2013 and on monthly human influenza cases from 2008 and 2011, we investigated temporal patterns of PM2.5 over the five-year period and utilized the wavelet approach to exploring the potential association between PM2.5 and influenza. RESULTS Our results found that ambient PM2.5 pollution was severe in Beijing with PM2.5 concentrations being significantly higher than the standards of the World Health Organization, the US EPA, and the Chinese EPA in the majority of days during the study period. Furthermore, PM2.5 concentrations in the winter heating seasons were higher than those in non-heating seasons despite high variations. We also found significant association between ambient PM2.5 peak and human influenza case increase with a delayed effect (e.g. delayed effect of PM2.5 on influenza). CONCLUSIONS Ambient PM2.5 concentrations were significantly associated with human influenza cases in Beijing, which have important implications for public health and environmental actions.
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Affiliation(s)
- Yijia Liang
- />Division of Environmental Health Sciences, College of Public Health, The Ohio State University, 424 Cunz Hall, 1841 Neil Avenue, Columbus, OH 43210 USA
- />Upper Arlington High School, Upper Arlington, OH USA
| | - Liqun Fang
- />Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Hui Pan
- />Peking Union Medical College Hospital, Beijing, China
| | - Kezhong Zhang
- />Center for Molecular Medicine & Genetics, Wayne State University School of Medicine, Detroit, MI USA
| | - Haidong Kan
- />School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, & Key Lab of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China
- />Research Institute for the Changing Global Environment and Fudan Tyndall Centre, Fudan University, Shanghai, China
- />Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Fudan University, Shanghai, China
| | | | - Qinghua Sun
- />Division of Environmental Health Sciences, College of Public Health, The Ohio State University, 424 Cunz Hall, 1841 Neil Avenue, Columbus, OH 43210 USA
- />Shanghai Key Laboratory of Meteorology and Health, Shanghai, China
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Grunig G, Marsh LM, Esmaeil N, Jackson K, Gordon T, Reibman J, Kwapiszewska G, Park SH. Perspective: ambient air pollution: inflammatory response and effects on the lung's vasculature. Pulm Circ 2014; 4:25-35. [PMID: 25006418 DOI: 10.1086/674902] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Accepted: 11/11/2013] [Indexed: 12/19/2022] Open
Abstract
Particulates from air pollution are implicated in causing or exacerbating respiratory and systemic cardiovascular diseases and are thought to be among the leading causes of morbidity and mortality. However, the contribution of ambient particulate matter to diseases affecting the pulmonary circulation, the right heart, and especially pulmonary hypertension is much less documented. Our own work and that of other groups has demonstrated that prolonged exposure to antigens via the airways can cause severe pulmonary arterial remodeling. In addition, vascular changes have been well documented in a typical disease of the airways, asthma. These experimental and clinical findings link responses in the airways with responses in the lung's vasculature. It follows that particulate air pollution could cause, or exacerbate, diseases in the pulmonary circulation and associated pulmonary hypertension. This perspective details the literature for support of this concept. Data regarding the health effects of particulate matter from air pollution on the lung's vasculature, with emphasis on the lung's inflammatory responses to particulate matter deposition and pulmonary hypertension, are discussed. A deeper understanding of the health implications of exposure to ambient particulate matter will improve our knowledge of how to improve the management of lung diseases, including diseases of the pulmonary circulation. As man-made ambient particulate air pollution is typically linked to economic growth, a better understanding of the health effects of exposure to particulate air pollution is expected to integrate the global goal of achieving healthy living for all.
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Affiliation(s)
- Gabriele Grunig
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Division of Pulmonary Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - Leigh M Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Nafiseh Esmaeil
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Katelin Jackson
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
| | - Terry Gordon
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
| | - Joan Reibman
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Division of Pulmonary Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | | | - Sung-Hyun Park
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
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Hong GU, Kim NG, Ro JY. Expression of airway remodeling proteins in mast cell activated by TGF-β released in OVA-induced allergic responses and their inhibition by low-dose irradiation or 8-oxo-dG. Radiat Res 2014; 181:425-38. [PMID: 24720751 DOI: 10.1667/rr13547.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Allergic asthma is characterized by chronic airway remodeling, which is associated with the expression of extracellular matrix proteins (ECM) by TGF-β. However, to date there are no reports demonstrating that structural proteins are directly expressed in mast cells. This study aimed to investigate whether ECM proteins are expressed in mast cells activated with antigen/antibody reaction, and whether the resolution effects of irradiation or 8-oxo-dG may contribute to allergic asthma prevention. Bone marrow-derived mast cells (BMMCs) were activated with DNP-HSA/anti-DNP IgE antibody (act-BMMCs). C57BL/6 mice were sensitized and challenged with ovalbumin (OVA) to induce allergic asthma. Mice were treated orally with 8-oxo-dG or exposed to whole body irradiation (using (137)Cs gamma ray at a dose of 0.5 Gy) for three consecutive days 24 h after OVA challenge. Expression of extracellular matrix (ECM) proteins, TGF-β signaling molecules and NF-κB/AP-1 was determined in the BMMCs, bronchoalveolar lavage (BAL) cells or lung tissues using Western blot, polymerase chain reaction (PCR) and electrophoretic mobility shift assay (EMSA), respectively. Act-BMMCs increased expression of ECM proteins, TGF-β/TGF-β receptor I, TGF-β signaling molecules and cytokines; and increased both NF-κB and AP-1 activity. In addition, the population of mast cells; expression of mast cell markers, TGF-β signaling molecules, ECM proteins/amounts; OVA-specific serum IgE level; numbers of goblet cells; airway hyperresponsiveness; cytokines/chemokines were increased in BAL cells and lung tissues of OVA-challenged mice. All of the above end points were reduced by irradiation or 8-oxo-dG in vitro and in vivo, respectively. The data suggest that mast cells induce expression of ECM proteins through TGF-β produced in inflammatory cells of OVA mice and that post treatment of irradiation or 8-oxo-dG after OVA-challenge may reduce airway remodeling through down-regulating mast cell re-activation by TGF-β/Smad signals.
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Affiliation(s)
- Gwan Ui Hong
- Department of Pharmacology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, South Korea
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27
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Li Y, Zhang Y, Yan B. Nanotoxicity overview: nano-threat to susceptible populations. Int J Mol Sci 2014; 15:3671-97. [PMID: 24590128 PMCID: PMC3975361 DOI: 10.3390/ijms15033671] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/09/2014] [Accepted: 02/13/2014] [Indexed: 01/12/2023] Open
Abstract
Due to the increasing applications of nanomaterials and nanotechnology, potential danger of nanoparticle exposure has become a critical issue. However, recent nanotoxicity studies have mainly focused on the health risks to healthy adult population. The nanotoxicity effects on susceptible populations (such as pregnant, neonate, diseased, and aged populations) have been overlooked. Due to the alterations in physiological structures and functions in susceptible populations, they often suffer more damage from the same exposure. Thus, it is urgent to understand the effects of nanoparticle exposure on these populations. In order to fill this gap, the potential effects of nanoparticles to pregnant females, neonate, diseased, and aged population, as well as the possible underlying mechanisms are reviewed in this article. Investigations show that responses from susceptible population to nanoparticle exposure are often more severe. Reduced protection mechanism, compromised immunity, and impaired self-repair ability in these susceptible populations may contribute to the aggravated toxicity effects. This review will help minimize adverse effects of nanoparticles to susceptible population in future nanotechnology applications.
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Affiliation(s)
- Yang Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Yi Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Bing Yan
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
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28
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Naik SR, Bhagat S, Shah PD, Tare AA, Ingawale D, Wadekar RR. Evaluation of anti-allergic and anti-anaphylactic activity of ethanolic extract of Zizyphus jujuba fruits in rodents. REVISTA BRASILEIRA DE FARMACOGNOSIA 2013. [DOI: 10.1590/s0102-695x2013000500014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Lei Y, Gregory JA, Nilsson GP, Adner M. Insights into mast cell functions in asthma using mouse models. Pulm Pharmacol Ther 2013; 26:532-9. [PMID: 23583635 DOI: 10.1016/j.pupt.2013.03.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 03/27/2013] [Accepted: 03/28/2013] [Indexed: 01/07/2023]
Abstract
Therapeutics targeting specific mechanisms of asthma have shown promising results in mouse models of asthma. However, these successes have not transferred well to the clinic or to the treatment of asthma sufferers. We suggest a reason for this incongruity is that mast cell-dependent responses, which may play an important role in the pathogenesis of both atopic and non-atopic asthma, are not a key component in most of the current asthma mouse models. Two reasons for this are that wild type mice have, in contrast to humans, a negligible number of mast cells localized in the smaller airways and in the parenchyma, and that only specific protocols show mast cell-dependent reactions. The development of mast cell-deficient mice and the reconstitution of mast cells within these mice have opened up the possibility to generate mouse models of asthma with a marked role of mast cells. In addition, mast cell-deficient mice engrafted with mast cells have a distribution of mast cells more similar to humans. In this article we review and highlight the mast cell-dependent and -independent responses with respect to airway hyperresponsiveness and inflammation in asthma models using mast cell-deficient and mast cell-engrafted mice.
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Affiliation(s)
- Ying Lei
- Clinical Immunology and Allergy Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
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30
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Hong GU, Park BS, Park JW, Kim SY, Ro JY. IgE production in CD40/CD40L cross-talk of B and mast cells and mediator release via TGase 2 in mouse allergic asthma. Cell Signal 2013; 25:1514-25. [PMID: 23524335 DOI: 10.1016/j.cellsig.2013.03.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 03/13/2013] [Accepted: 03/13/2013] [Indexed: 11/16/2022]
Abstract
TGase 2 is over-expressed in a variety of inflammatory diseases including allergic asthma. This study aimed to investigate the role of TGase 2 on IgE production and signaling pathways in mast cell activation related to OVA-induced allergic asthma. Bone marrow-derived mast cells (BMMCs) isolated from WT or TGase 2(-/-) mice were activated with Ag/Ab (refer to act-WT-BMMCs and act-KO-BMMCs, respectively). B cells isolated from splenocytes were activated with anti-mouse IgM (act-B cells), and B cells were co-cultured with BMMCs. WT and TGase 2(-/-) mice were sensitized and challenged with OVA adsorbed in alum hydroxide. Intracellular Ca(2+) ([Ca(2+)]i) levels were determined by fluorescence intensity; IgE, mediators and TGase 2 activity by ELISA; the CD138 expression by FACS analyzer; cell surface markers and signal molecules by Western blot; NF-κB by EMSA; co-localization of mast cells and B cells by immunohistochemistry; Fcε RI-mediated mast cell activation by PCA test; expression of cytokines, MMPs, TIMPs, TLR2 and FcεRI by RT-PCR. In vitro, act-KO-BMMCs reduced the [Ca(2+)]i levels, NF-κB activity, expression of CD40/CD40L, plasma cells, total IgE levels and TGase 2 activity in act-B cells co-cultured with act-BMMCs, expression of inflammatory cytokines and MMPs2/9, release of mediators (TNF-α, LTs and cytokines), and activities of signal molecules (PKCs, MAP kinases, I-κB and PLA2), which were all increased in act-WT-BMMCs. TGase 2 siRNA transfected/activated-BMMCs reduced all responses as same as those in act-KO-BMMCs. In allergic asthma model, TGase 2(-/-) mice protected against PCA reaction, OVA-specific IgE production and AHR, and they reduced co-localization of mast cells and B cells or IgE in lung tissues, expression and co-localization of surface molecules in mast cells (c-kit and CD40L) and B cells (CD23 and CD40), inflammatory cells including mast cells, goblet cells, amounts of collagen and mediator release in BAL fluid and/or lung tissues, which were all increased in WT mice. TLR expression in TGase 2(-/-) mice did not differ from those in WT mice. Our data suggest that TGase 2 expression and Ca(2+) influx required by bidirectional events in mast cell activation facilitate IgE production in B cells via up-regulating mast cell CD40L expression, and induce the expression of numerous signaling molecules associated with airway inflammation and remodeling in allergic asthma.
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Affiliation(s)
- Gwan Ui Hong
- Department of Pharmacology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
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31
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Follenweider LM, Lambertino A. Epidemiology of asthma in the United States. Nurs Clin North Am 2013; 48:1-10. [PMID: 23465442 DOI: 10.1016/j.cnur.2012.12.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Incidence and prevalence rates of asthma can vary greatly according to population and location. The National Heart and Blood Institute of the National Institutes of Health defines asthma as a common chronic disorder of the airways that involves a complex interaction of airflow obstruction, bronchial hyperresponsiveness, and an underlying inflammation. This article uses the most common definitions and diagnostic methods for asthma. In 2009 there were 2.1 million asthma-related emergency department (ED) visits. ED visits lend an opportunity for providers to identify and intervene in the care of patients whose asthma is poorly controlled.
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Iron supplementation decreases severity of allergic inflammation in murine lung. PLoS One 2012; 7:e45667. [PMID: 23029172 PMCID: PMC3447873 DOI: 10.1371/journal.pone.0045667] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 08/21/2012] [Indexed: 02/07/2023] Open
Abstract
The incidence and severity of allergic asthma have increased over the last century, particularly in the United States and other developed countries. This time frame was characterized by marked environmental changes, including enhanced hygiene, decreased pathogen exposure, increased exposure to inhaled pollutants, and changes in diet. Although iron is well-known to participate in critical biologic processes such as oxygen transport, energy generation, and host defense, iron deficiency remains common in the United States and world-wide. The purpose of these studies was to determine how dietary iron supplementation affected the severity of allergic inflammation in the lungs, using a classic model of IgE-mediated allergy in mice. Results showed that mice fed an iron-supplemented diet had markedly decreased allergen-induced airway hyperreactivity, eosinophil infiltration, and production of pro-inflammatory cytokines, compared with control mice on an unsupplemented diet that generated mild iron deficiency but not anemia. In vitro, iron supplementation decreased mast cell granule content, IgE-triggered degranulation, and production of pro-inflammatory cytokines post-degranulation. Taken together, these studies show that iron supplementation can decrease the severity of allergic inflammation in the lung, potentially via multiple mechanisms that affect mast cell activity. Further studies are indicated to determine the potential of iron supplementation to modulate the clinical severity of allergic diseases in humans.
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The Immunomodulatory Effect of You-Gui-Wan on Dermatogoides-pteronyssinus-Induced Asthma. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:476060. [PMID: 22675381 PMCID: PMC3363355 DOI: 10.1155/2012/476060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/19/2012] [Accepted: 03/19/2012] [Indexed: 01/21/2023]
Abstract
The traditional Chinese medicine You-Gui-Wan (YGW) contains ten species of medicinal plants and has been used to improve health in remissive states of asthma for hundreds of years in Asia. However, little is known about the immunomodulatory mechanisms in vivo. Therefore, this study investigated the pathologic and immunologic responses to YGW in mice that had been repeatedly exposed to Dermatogoides-pteronyssinus (Der p). YGW reduced Der-p-induced airway hyperresponsiveness and total IgE in serum. It also inhibited eosinophil infiltration by downregulating the protein expression of IL-5 in serum and changed the Th2-bios in BALF by upregulating IL-12. Results of the collagen assay and histopathologic examination showed that YGW reduced airway remodeling in the lung. In addition, after YGW treatment there was a relative decrease in mRNA expression of TGF-β1, IL-13, eotaxin, RANTES, and MCP-1 in lung in the YGW group. The results of EMSA and immunohistochemistry revealed that YGW inhibited NF-κB expression in epithelial lung cells. YGW exerts its regulative effects in chronic allergic asthmatic mice via its anti-inflammatory activity and by inhibiting the progression of airway remodeling.
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Köberle M, Kaesler S, Kempf W, Wölbing F, Biedermann T. Tetraspanins in mast cells. Front Immunol 2012; 3:106. [PMID: 22783251 PMCID: PMC3346162 DOI: 10.3389/fimmu.2012.00106] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 04/17/2012] [Indexed: 01/01/2023] Open
Abstract
Mast cells (MC) are key mediators of the immune system, most prominently known for their role in eliciting harmful allergic reactions. Mast cell mediator release (e.g. by degranulation) is triggered by FcεRI recognition of antigen – IgE complexes. Until today no therapeutic targeting of this and other mast cell activation pathways is established. Among possible new candidates there are tetraspanins that have been described on MC already several years ago. Tetraspanins are transmembrane proteins acting as scaffolds, mediating local clustering of their interaction partners, and thus amplify their activities. More recently, tetraspanins were also found to exert intrinsic receptor functions. Tetraspanins have been found to be crucial components of fundamental biological processes like cell motility and adhesion. In immune cells, they not only boost the effectiveness of antigen presentation by clustering MHC molecules, they are also key players in all kinds of degranulation events and immune receptor clustering. This review focuses on the contribution of tetraspanins clustered with FcεRI or residing in granule membranes to classical MC functions but also undertakes an outlook on the possible contribution of tetraspanins to newly described mast cell functions and discusses possible targets for drug development.
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Affiliation(s)
- Martin Köberle
- Department of Dermatology, Eberhard Karls University Tübingen Tübingen, Germany
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Hsia BJ, Ledford JG, Potts-Kant EN, Nikam VS, Lugogo NL, Foster WM, Kraft M, Abraham SN, Wright JR. Mast cell TNF receptors regulate responses to Mycoplasma pneumoniae in surfactant protein A (SP-A)-/- mice. J Allergy Clin Immunol 2012; 130:205-14.e2. [PMID: 22502799 PMCID: PMC3578696 DOI: 10.1016/j.jaci.2012.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 02/21/2012] [Accepted: 03/01/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Mycoplasma pneumoniae (Mp) frequently colonizes the airways of patients with chronic asthma and likely contributes to asthma exacerbations. We previously reported that mice lacking surfactant protein A (SP-A) have increased airway hyperresponsiveness (AHR) during M pneumoniae infection versus wild-type mice mediated by TNF-α. Mast cells (MCs) have been implicated in AHR in asthma models and produce and respond to TNF-α. OBJECTIVE Determine the contribution of MC/TNF interactions to AHR in airways lacking functional SP-A during Mp infection. METHODS Bronchoalveolar lavage fluid was collected from healthy and asthmatic subjects to examine TNF-α levels and M pneumoniae positivity. To determine how SP-A interactions with MCs regulate airway homeostasis, we generated mice lacking both SP-A and MCs (SP-A(-/-)Kit(W-sh/W-sh)) and infected them with M pneumoniae. RESULTS Our findings indicate that high TNF-α levels correlate with M pneumoniae positivity in human asthmatic patients and that human SP-A inhibits M pneumoniae-stimulated transcription and release of TNF-α by MCs, implicating a protective role for SP-A. MC numbers increase in M pneumoniae-infected lungs, and airway reactivity is dramatically attenuated when MCs are absent. Using SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF receptor (TNF-R)(-/-) MCs, we found that TNF-α activation of MCs through the TNF-R, but not MC-derived TNF-α, leads to augmented AHR during M pneumoniae infection when SP-A is absent. Additionally, M pneumoniae-infected SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF-R(-/-) MCs have decreased mucus production compared with that seen in mice engrafted with wild-type MCs, whereas burden was unaffected. CONCLUSION Our data highlight a previously unappreciated but vital role for MCs as secondary responders to TNF-α during the host response to pathogen infection.
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Affiliation(s)
- Bethany J Hsia
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
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Chen EY, Garnica M, Wang YC, Mintz AJ, Chen CS, Chin WC. A mixture of anatase and rutile TiO₂ nanoparticles induces histamine secretion in mast cells. Part Fibre Toxicol 2012; 9:2. [PMID: 22260553 PMCID: PMC3275461 DOI: 10.1186/1743-8977-9-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 01/19/2012] [Indexed: 11/18/2022] Open
Abstract
Background Histamine released from mast cells, through complex interactions involving the binding of IgE to FcεRI receptors and the subsequent intracellular Ca2+ signaling, can mediate many allergic/inflammatory responses. The possibility of titanium dioxide nanoparticles (TiO2 NPs), a nanomaterial pervasively used in nanotechnology and pharmaceutical industries, to directly induce histamine secretion without prior allergen sensitization has remained uncertain. Results TiO2 NP exposure increased both histamine secretion and cytosolic Ca2+ concentration ([Ca2+]C) in a dose dependent manner in rat RBL-2H3 mast cells. The increase in intracellular Ca2+ levels resulted primarily from an extracellular Ca2+ influx via membrane L-type Ca2+ channels. Unspecific Ca2+ entry via TiO2 NP-instigated membrane disruption was demonstrated with the intracellular leakage of a fluorescent calcein dye. Oxidative stress induced by TiO2 NPs also contributed to cytosolic Ca2+ signaling. The PLC-IP3-IP3 receptor pathways and endoplasmic reticulum (ER) were responsible for the sustained elevation of [Ca2+]C and histamine secretion. Conclusion Our data suggests that systemic circulation of NPs may prompt histamine release at different locales causing abnormal inflammatory diseases. This study provides a novel mechanistic link between environmental TiO2 NP exposure and allergen-independent histamine release that can exacerbate manifestations of multiple allergic responses.
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Affiliation(s)
- Eric Y Chen
- Bioengineering, University of California at Merced, Merced, CA, USA, 5200 North Lake RD, Merced, CA 95343, USA
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Orchestrating house dust mite-associated allergy in the lung. Trends Immunol 2011; 32:402-11. [PMID: 21783420 DOI: 10.1016/j.it.2011.06.006] [Citation(s) in RCA: 296] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 05/21/2011] [Accepted: 06/16/2011] [Indexed: 12/14/2022]
Abstract
House dust mites (HDM; Dermatophagoides sp.) are one of the commonest aeroallergens worldwide and up to 85% of asthmatics are typically HDM allergic. Allergenicity is associated both with the mites themselves and with ligands derived from mite-associated bacterial and fungal products. Murine models of allergic airways disease for asthma research have recently switched from the use of surrogate allergen ovalbumin together with adjuvant to use of the HDM extract. This has accelerated understanding of how adaptive and innate immunity generate downstream pathology. We review the myriad ways in which HDM allergic responses are orchestrated. Understanding the molecular pathways that elicit HDM-associated pathology is likely to reveal novel targets for therapeutic intervention.
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