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Watson N, Kuppuswamy S, Ledford WL, Sukumari-Ramesh S. The role of HDAC3 in inflammation: mechanisms and therapeutic implications. Front Immunol 2024; 15:1419685. [PMID: 39050859 PMCID: PMC11266039 DOI: 10.3389/fimmu.2024.1419685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 06/10/2024] [Indexed: 07/27/2024] Open
Abstract
Histone deacetylases (HDACs) are critical regulators of inflammatory gene expression, and the efficacy of pan-HDAC inhibitors has been implicated in various disease conditions. However, it remains largely unclear how HDACs precisely regulate inflammation. To this end, evaluating the isoform-specific function of HDACs is critical, and the isoform-specific targeting could also circumvent the off-target effects of pan-HDAC inhibitors. This review provides an overview of the roles of HDAC3, a class I HDAC isoform, in modulating inflammatory responses and discusses the molecular mechanisms by which HDAC3 regulates inflammation associated with brain pathology, arthritis, cardiovascular diseases, lung pathology, allergic conditions, and kidney disorders. The articles also identify knowledge gaps in the field for future studies. Despite some conflicting reports, the selective inhibition of HDAC3 has been demonstrated to play a beneficial role in various inflammatory pathologies. Exploring the potential of HDAC3 inhibition to improve disease prognosis is a promising avenue requiring further investigation.
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Affiliation(s)
| | | | | | - Sangeetha Sukumari-Ramesh
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
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2
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Guo X, Zhao X, Li L, Jiang M, Zhou A, Gao Y, Zheng P, Liu J, Zhao X. Platycodon grandiflorus polysaccharide inhibits the inflammatory response of 3D4/21 cells infected with PCV2. Microb Pathog 2024; 189:106592. [PMID: 38423406 DOI: 10.1016/j.micpath.2024.106592] [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: 11/07/2023] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 03/02/2024]
Abstract
Porcine circovirus type 2 (PCV2) infection cause multi-systemic inflammation in pigs. Platycodon grandiflorus polysaccharide (PGPSt) has been reported to have the effects of immune regulation and disease resistance. Nevertheless, the role and mechanism of PGPSt in the inflammatory response of 3D4/21 cells induced by PCV2 infection remain unclear. The present study aims to investigate effects of PGPSt on inflammatory response and its possible underlying mechanisms in vitro models. Cells were treated with PCV2 for 36 h to construct a cell inflammation model. The 3D4/21 cell lines were pretreated with or without PGPSt, and the changes of inflammation-related markers and the signaling pathway were detected by CCK-8, ELISA, qPCR and Western blot. The results showed that PGPSt was non-toxic to cells and protected PCV2-infected cells from inflammatory damage. PGPSt could significantly inhibit the high acetylation of histone H3 (AcH3) and histone H4 (AcH4), down-regulate HAT and up-regulate HDAC activity, and reduce the expression of pro-inflammatory enzymes iNOS and COX-2 proteins levels. Then the levels of IL-1β, IL-6 and TNF-α were significantly inhibited, and the level of IL-10 was promoted. We also observed that PGPSt inhibited the phosphorylation of p65, p38 and Erk1/2, which subsequently inhibited nuclear translocation of NF-κB p65 to express pro-inflammatory factors. In conclusion, PGPSt can reduce the inflammatory response by regulating histone acetylation, reducing the release of inflammatory factors, reducing the expression of pro-inflammatory enzymes, and inhibiting the activation of NF-κB and MAPKs signaling pathways. This suggests that PGPSt had an anti-inflammatory effect on the inflammatory response caused by PCV2 infection, which provided theoretical data support for the research.
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Affiliation(s)
- Xiaocheng Guo
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China; Weifang University of Science and Technology, Weifang, Shandong, 262700, China
| | - Ximan Zhao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Linjue Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Menglin Jiang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Aiqin Zhou
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Yifan Gao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Pimiao Zheng
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China
| | - Jianzhu Liu
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai`an, Shandong, 271018, China.
| | - Xiaona Zhao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai`an, Shandong, 271018, China.
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Cha J, Choi S. Gene-Smoking Interaction Analysis for the Identification of Novel Asthma-Associated Genetic Factors. Int J Mol Sci 2023; 24:12266. [PMID: 37569643 PMCID: PMC10419280 DOI: 10.3390/ijms241512266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 08/13/2023] Open
Abstract
Asthma is a complex heterogeneous disease caused by gene-environment interactions. Although numerous genome-wide association studies have been conducted, these interactions have not been systemically investigated. We sought to identify genetic factors associated with the asthma phenotype in 66,857 subjects from the Health Examination Study, Cardiovascular Disease Association Study, and Korea Association Resource Study cohorts. We investigated asthma-associated gene-environment (smoking status) interactions at the level of single nucleotide polymorphisms, genes, and gene sets. We identified two potentially novel (SETDB1 and ZNF8) and five previously reported (DM4C, DOCK8, MMP20, MYL7, and ADCY9) genes associated with increased asthma risk. Numerous gene ontology processes, including regulation of T cell differentiation in the thymus (GO:0033081), were significantly enriched for asthma risk. Functional annotation analysis confirmed the causal relationship between five genes (two potentially novel and three previously reported genes) and asthma through genome-wide functional prediction scores (combined annotation-dependent depletion, deleterious annotation of genetic variants using neural networks, and RegulomeDB). Our findings elucidate the genetic architecture of asthma and improve the understanding of its biological mechanisms. However, further studies are necessary for developing preventive treatments based on environmental factors and understanding the immune system mechanisms that contribute to the etiology of asthma.
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Affiliation(s)
- Junho Cha
- Department of Applied Artificial Intelligence, College of Computing, Hanyang University, 55 Hanyang-daehak-ro, Sangnok-gu, Ansan 15588, Republic of Korea;
| | - Sungkyoung Choi
- Department of Applied Artificial Intelligence, College of Computing, Hanyang University, 55 Hanyang-daehak-ro, Sangnok-gu, Ansan 15588, Republic of Korea;
- Department of Mathematical Data Science, College of Science and Convergence Technology, Hanyang University, 55 Hanyang-daehak-ro, Sangnok-gu, Ansan 15588, Republic of Korea
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Sharma R, Tiwari A, Kho AT, Celedón JC, Weiss ST, Tantisira KG, McGeachie MJ. Systems Genomics Reveals microRNA Regulation of ICS Response in Childhood Asthma. Cells 2023; 12:1505. [PMID: 37296627 PMCID: PMC10309175 DOI: 10.3390/cells12111505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/29/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Asthmatic patients' responses to inhaled corticosteroids (ICS) are variable and difficult to quantify. We have previously defined a Cross-sectional Asthma STEroid Response (CASTER) measure of ICS response. MicroRNAs (miRNAs) have shown strong effects on asthma and inflammatory processes. OBJECTIVE The purpose of this study was to identify key associations between circulating miRNAs and ICS response in childhood asthma. METHODS Small RNA sequencing in peripheral blood serum from 580 children with asthma on ICS treatment from The Genetics of Asthma in Costa Rica Study (GACRS) was used to identify miRNAs associated with ICS response using generalized linear models. Replication was conducted in children on ICS from the Childhood Asthma Management Program (CAMP) cohort. The association between replicated miRNAs and the transcriptome of lymphoblastoid cell lines in response to a glucocorticoid was assessed. RESULTS The association study on the GACRS cohort identified 36 miRNAs associated with ICS response at 10% false discovery rate (FDR), three of which (miR-28-5p, miR-339-3p, and miR-432-5p) were in the same direction of effect and significant in the CAMP replication cohort. In addition, in vitro steroid response lymphoblastoid gene expression analysis revealed 22 dexamethasone responsive genes were significantly associated with three replicated miRNAs. Furthermore, Weighted Gene Co-expression Network Analysis (WGCNA) revealed a significant association between miR-339-3p and two modules (black and magenta) of genes associated with immune response and inflammation pathways. CONCLUSION This study highlighted significant association between circulating miRNAs miR-28-5p, miR-339-3p, and miR-432-5p and ICS response. miR-339-3p may be involved in immune dysregulation, which leads to a poor response to ICS treatment.
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Affiliation(s)
- Rinku Sharma
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Anshul Tiwari
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37235, USA
| | - Alvin T. Kho
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Computational Health Informatics Program, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Juan C. Celedón
- Division of Pediatric Pulmonary Medicine, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Scott T. Weiss
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Kelan G. Tantisira
- Division of Pediatric Respiratory Medicine, University of California San Diego, Rady Children’s Hospital, San Diego, CA 92123, USA
| | - Michael J. McGeachie
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
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An TJ, Kim JH, Hur J, Park CK, Lim JU, Kim S, Rhee CK, Yoon HK. Tiotropium Bromide Improves Neutrophilic Asthma by Recovering Histone Deacetylase 2 Activity. J Korean Med Sci 2023; 38:e91. [PMID: 36974400 PMCID: PMC10042725 DOI: 10.3346/jkms.2023.38.e91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 12/20/2022] [Indexed: 03/14/2023] Open
Abstract
BACKGROUND The value of tiotropium bromide (TIO) in neutrophilic asthma was meaningful in previous study. We hypothesized that TIO's mechanism of action is associated with histone deacetylase 2 (HDAC2) activity, which is key for controlling the transcription of inflammatory cytokines and usually downregulated in neutrophilic asthma. METHODS The effects of TIO and dexamethasone (DEX) on HDAC2 activity, nuclear factor kappa B (NF-κB), and C-X-C motif chemokine ligand 1 (CXCL1) were evaluated in neutrophilic asthma mouse model (C57BL, 6-week-old). An in-vitro study was conducted using primary human bronchial/tracheal epithelial (HBE) cells from asthma patients. Western blot analyses were performed for phospho-phospholipase Cγ-1 (PLCγ-1) and inositol trisphosphate (IP3) receptors (IP3R) with treating lipopolysaccharide (LPS) and TIO. RESULTS Ovalbumin was used to induce eosinophilic inflammation in this study. After neutrophilic asthma was induced by LPS (O+L group), HDAC2 activity was diminished with increased NF-κB activity and CXCL1 compared to the control group. TIO significantly improved NF-κB activity, CXCL1, and HDAC2 activity compared with the O+L group in in-vivo study (P < 0.05, each). Western blot analyses showed that LPS treated HBE cells from asthma patients increased PLCγ-1 and diminished IP3 receptor levels. After TIO treatment, recovery of IP3R and improved PLCγ-1 levels were observed. CONCLUSION These results support the hypothesis that TIO modulates inflammation by recovering HDAC2 activity from the acetylcholine-stimulated inflammation cascade in neutrophilic asthma. The detailed inflammation cascade of recovering HDAC2 activity by TIO might be associated with PLCγ-1-IP3-IP3R mediated intracellular calcium ion pathway.
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Affiliation(s)
- Tai Joon An
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ji Hye Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jung Hur
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chan Kwon Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jeong Uk Lim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seohyun Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chin Kook Rhee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyoung Kyu Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Ubah UDB, Triyasakorn K, Roan B, Conlin M, Lai JCK, Awale PS. Pan HDACi Valproic Acid and Trichostatin A Show Apparently Contrasting Inflammatory Responses in Cultured J774A.1 Macrophages. EPIGENOMES 2022; 6:epigenomes6040038. [PMID: 36412793 PMCID: PMC9680436 DOI: 10.3390/epigenomes6040038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/25/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022] Open
Abstract
This study was initiated as an attempt to clarify some of the apparent conflicting data regarding the so-called anti-inflammatory versus proinflammatory properties of histone deacetylase inhibitors (HDACis). In cell culture, typically, chronic pretreatment with the HDACi valproic acid (VPA) and trichostatin A (TSA) exhibits an anti-inflammatory effect. However, the effect of acute treatment with VPA and TSA on the levels of inflammatory cytokines in J774A.1 macrophage cell line is unknown. Therefore, this study investigated the effect of acute treatment with VPA and TSA on levels of key inflammatory cytokines in maximally stimulated J774A.1 cells. J774A.1 macrophages were treated with either VPA or TSA for 1 h (acute treatment), followed by maximal stimulation with LPS + IFNγ for 24 h. ELISA was used to measure the levels of proinflammatory cytokines TNFα, NO and IL-1β from the culture medium. Acute treatment with VPA showed a dose-dependent increase in levels of all three cytokines. Similar to VPA, TSA also showed a dose-dependent increase in levels of IL-1β alone. This study sheds new light on the conflicting data in the literature that may partly be explained by acute or short-term exposure versus chronic or long-term exposure to HDACi.
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Affiliation(s)
- Ubah Dominic Babah Ubah
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
| | - Korawin Triyasakorn
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
| | - Brandon Roan
- Division of Health Sciences, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
| | - Minsyusheen Conlin
- Department of Biological Sciences, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
| | - James C. K. Lai
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
| | - Prabha S. Awale
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Idaho State University, 921 S 8th Avenue, Mail Stop 8288, Pocatello, ID 83209, USA
- Correspondence:
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7
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Hosseini B, Berthon BS, Jensen ME, McLoughlin RF, Wark PAB, Nichol K, Williams EJ, Baines KJ, Collison A, Starkey MR, Mattes J, Wood LG. The Effects of Increasing Fruit and Vegetable Intake in Children with Asthma on the Modulation of Innate Immune Responses. Nutrients 2022; 14:nu14153087. [PMID: 35956264 PMCID: PMC9370535 DOI: 10.3390/nu14153087] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/23/2022] [Accepted: 07/25/2022] [Indexed: 12/04/2022] Open
Abstract
Children with asthma are at risk of acute exacerbations triggered mainly by viral infections. A diet high in fruit and vegetables (F&V), a rich source of carotenoids, may improve innate immune responses in children with asthma. Children with asthma (3−11 years) with a history of exacerbations and low F&V intake (≤3 serves/d) were randomly assigned to a high F&V diet or control (usual diet) for 6 months. Outcomes included respiratory-related adverse events and in-vitro cytokine production in peripheral blood mononuclear cells (PBMCs), treated with rhinovirus-1B (RV1B), house dust mite (HDM) and lipopolysaccharide (LPS). During the trial, there were fewer subjects with ≥2 asthma exacerbations in the high F&V diet group (n = 22) compared to the control group (n = 25) (63.6% vs. 88.0%, p = 0.049). Duration and severity of exacerbations were similar between groups. LPS-induced interferon (IFN)-γ and IFN-λ production showed a small but significant increase in the high F&V group after 3 months compared to baseline (p < 0.05). Additionally, RV1B-induced IFN-λ production in PBMCs was positively associated with the change in plasma lycopene at 6 months (rs = 0.35, p = 0.015). A high F&V diet reduced asthma-related illness and modulated in vitro PBMC cytokine production in young children with asthma. Improving diet quality by increasing F&V intake could be an effective non-pharmacological strategy for preventing asthma-related illness by enhancing children’s innate immune responses.
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Affiliation(s)
- Banafsheh Hosseini
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Bronwyn S. Berthon
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Megan E. Jensen
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (M.E.J.); (J.M.)
| | - Rebecca F. McLoughlin
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Peter A. B. Wark
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW 2305, Australia
| | - Kristy Nichol
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Evan J. Williams
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Katherine J. Baines
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
| | - Adam Collison
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (M.E.J.); (J.M.)
| | - Malcolm R. Starkey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (M.E.J.); (J.M.)
- Department of Immunology and Pathology, Central Clinical School, Sub-Faculty of Translational Medicine and Public Health, Monash University, Melbourne, VIC 3004, Australia
| | - Joerg Mattes
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (M.E.J.); (J.M.)
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW 2305, Australia
| | - Lisa G. Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (B.H.); (B.S.B.); (R.F.M.); (P.A.B.W.); (K.N.); (E.J.W.); (K.J.B.); (A.C.); (M.R.S.)
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW 2305, Australia; (M.E.J.); (J.M.)
- Correspondence:
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Wu S, Liu H. Sirtuins-Novel Regulators of Epigenetic Alterations in Airway Inflammation. Front Genet 2022; 13:862577. [PMID: 35620467 PMCID: PMC9127257 DOI: 10.3389/fgene.2022.862577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/31/2022] [Indexed: 11/13/2022] Open
Abstract
Histone modification is an important epigenetic alteration, and histone deacetylases are involved in the occurrence and development of various respiratory diseases. Sirtuins (SIRTs) have been demonstrated to play an important role in the formation and progression of chronic inflammatory diseases of the respiratory tract. SIRTs participate in the regulation of oxidative stress and inflammation and are related to cell structure and cellular localization. This paper summarizes the roles and mechanisms of SIRTs in airway inflammation and describes the latest research on SIRT modulators, aiming to provide a theoretical basis for the study of potential epigenetic alteration-inducing drug targets.
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Affiliation(s)
- Shunyu Wu
- Department of Otolaryngological, the Second Affiliated Hospital of the Naval Military Medical University (Shanghai Changzheng Hospital), Shanghai, China
| | - Huanhai Liu
- Department of Otolaryngological, the Second Affiliated Hospital of the Naval Military Medical University (Shanghai Changzheng Hospital), Shanghai, China
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9
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Lin Y, Qiu T, Wei G, Que Y, Wang W, Kong Y, Xie T, Chen X. Role of Histone Post-Translational Modifications in Inflammatory Diseases. Front Immunol 2022; 13:852272. [PMID: 35280995 PMCID: PMC8908311 DOI: 10.3389/fimmu.2022.852272] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 01/24/2022] [Indexed: 12/12/2022] Open
Abstract
Inflammation is a defensive reaction for external stimuli to the human body and generally accompanied by immune responses, which is associated with multiple diseases such as atherosclerosis, type 2 diabetes, Alzheimer’s disease, psoriasis, asthma, chronic lung diseases, inflammatory bowel disease, and multiple virus-associated diseases. Epigenetic mechanisms have been demonstrated to play a key role in the regulation of inflammation. Common epigenetic regulations are DNA methylation, histone modifications, and non-coding RNA expression; among these, histone modifications embrace various post-modifications including acetylation, methylation, phosphorylation, ubiquitination, and ADP ribosylation. This review focuses on the significant role of histone modifications in the progression of inflammatory diseases, providing the potential target for clinical therapy of inflammation-associated diseases.
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Affiliation(s)
- Yingying Lin
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Ting Qiu
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Guifeng Wei
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Yueyue Que
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Wenxin Wang
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yichao Kong
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Tian Xie
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Xiabin Chen
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
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10
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Park CK, An TJ, Kim JH, Chin Kook R, Yoon HK. Synergistic Effect of Roflumilast with Dexamethasone in a Neutrophilic Asthma Mouse Model. Clin Exp Pharmacol Physiol 2022; 49:624-632. [PMID: 35181901 DOI: 10.1111/1440-1681.13635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 10/29/2021] [Accepted: 11/08/2021] [Indexed: 11/26/2022]
Abstract
Asthma is a chronic airway inflammatory disease with heterogeneous features. Most cases of asthma are steroid sensitive, but 5-10% are unresponsive to steroids, leading to challenges in treatment. Neutrophilic asthma is steroid-resistant and characterized by the absence or suppression of the TH 2 process and an increase in the TH 1 and/or TH 17 process. Roflumilast (ROF) has anti-inflammatory effects and has been used to treat chronic inflammatory airway diseases, such as chronic pulmonary obstructive disease. It is unclear whether ROF may have a therapeutic role in neutrophilic asthma. In this study, we investigated the synergistic effect of ROF with dexamethasone in a neutrophilic asthma mouse model. C57BL/6 female mice sensitized to ovalbumin (OVA) were exposed to five intranasal OVA treatments and three intranasal lipopolysaccharide (LPS) treatments for an additional 10 days. During the intranasal OVA challenge, ROF was administered orally, and dexamethasone (DEX) was injected intraperitoneally. Protein, pro-inflammatory cytokines, inflammatory cytokines, and other suspected markers were identified by enzyme-linked immunosorbent assay, real-time polymerase chain reaction, and Western blot. Following exposure to LPS in OVA-induced asthmatic mice, neutrophil predominant airway inflammation rather than eosinophil predominant inflammation was observed, with increases in airway hyperresponsiveness (AHR). The lungs of animals treated with ROF exhibited less airway inflammation and hyperresponsiveness. To investigate the mechanism underlying this effect, we examined the expression of proinflammatory cytokines suspected to be involved in inflammatory cytokines and proteins. ROF reduced total protein in bronchioalveolar lavage fluid; levels of IL-17A, IL-1β mRNA, IFN-γ, and TNF-α; and recovered histone deacetylase-2 (HDAC2) activity. Combination therapy with ROF and DEX further reduced the levels of IL-17, IL-22, and IL-1β mRNA and proinflammatory cytokines. The combination of ROF and DEX reduced lung inflammation and airway hyperresponsiveness much more than one of them alone. ROF reduces AHR and lung inflammation in the neutrophilic asthma mouse model. Furthermore, additive effects were observed when DEX was added to ROF treatment, possibly because of recovery of HDAC2/β-Actin activity. This study demonstrates the anti-inflammatory properties of ROF in a neutrophilic asthma mouse model.
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Affiliation(s)
- Chan Kwon Park
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Tai Joon An
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ji Hye Kim
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Rhee Chin Kook
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyoung Kyu Yoon
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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11
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Novel Immunomodulatory Therapies for Respiratory Pathologies. COMPREHENSIVE PHARMACOLOGY 2022. [PMCID: PMC8238403 DOI: 10.1016/b978-0-12-820472-6.00073-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Menzella F, Ghidoni G, Fontana M, Capobelli S, Livrieri F, Castagnetti C, Facciolongo N. The role of systemic corticosteroids in severe asthma and new evidence in their management and tapering. Expert Rev Clin Immunol 2021; 17:1283-1299. [PMID: 34761712 DOI: 10.1080/1744666x.2021.2004123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Based on the latest literature evidence, between 30% and 60% of adults with severe refractory asthma (SRA) are systemic corticosteroid (SCS) dependent. There are numerous therapeutic options in asthma, which are often not effective in severe forms. In these cases, SCS should be considered, but it is increasingly recognized that their regular use is often associated with significant and potentially serious adverse events. AREAS COVERED The aim of this article is to provide an update about the recent and significant literature on SCS and to establish their role in the management of SRA. We summarized the most important and recent evidence and we provided useful indications for clinicians. EXPERT OPINION There is now strong evidence supporting the increased risk of comorbidities and complications with long-term SCS therapies, regardless of the dose. New evidence on SCS tapering and withdrawal will allow to define protocols to address SCS management with greater safety and effectiveness, after starting efficient steroid-sparing strategies. In the next 5years, it will be necessary to implement corrective actions to address these unmet needs, to reduce the inappropriate use of SCS by maximizing the application of more innovative and effective therapies.
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Affiliation(s)
- Francesco Menzella
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
| | - Giulia Ghidoni
- University Hospital of Modena, 208968,Respiratory Diseases Unit, Department of Medical and Surgical Sciences, University of Modena Reggio Emilia, Modena, Italy
| | - Matteo Fontana
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
| | - Silvia Capobelli
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
| | - Francesco Livrieri
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
| | - Claudia Castagnetti
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
| | - Nicola Facciolongo
- Department of Medical Specialties, Pulmonology Unit, Arcispedale Santa Maria Nuova, Azienda USL Di Reggio Emilia - IRCCS, Reggio Emilia, Italy
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13
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Banerjee P, Balraj P, Ambhore NS, Wicher SA, Britt RD, Pabelick CM, Prakash YS, Sathish V. Network and co-expression analysis of airway smooth muscle cell transcriptome delineates potential gene signatures in asthma. Sci Rep 2021; 11:14386. [PMID: 34257337 PMCID: PMC8277837 DOI: 10.1038/s41598-021-93845-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/28/2021] [Indexed: 02/06/2023] Open
Abstract
Airway smooth muscle (ASM) is known for its role in asthma exacerbations characterized by acute bronchoconstriction and remodeling. The molecular mechanisms underlying multiple gene interactions regulating gene expression in asthma remain elusive. Herein, we explored the regulatory relationship between ASM genes to uncover the putative mechanism underlying asthma in humans. To this end, the gene expression from human ASM was measured with RNA-Seq in non-asthmatic and asthmatic groups. The gene network for the asthmatic and non-asthmatic group was constructed by prioritizing differentially expressed genes (DEGs) (121) and transcription factors (TFs) (116). Furthermore, we identified differentially connected or co-expressed genes in each group. The asthmatic group showed a loss of gene connectivity due to the rewiring of major regulators. Notably, TFs such as ZNF792, SMAD1, and SMAD7 were differentially correlated in the asthmatic ASM. Additionally, the DEGs, TFs, and differentially connected genes over-represented in the pathways involved with herpes simplex virus infection, Hippo and TGF-β signaling, adherens junctions, gap junctions, and ferroptosis. The rewiring of major regulators unveiled in this study likely modulates the expression of gene-targets as an adaptive response to asthma. These multiple gene interactions pointed out novel targets and pathways for asthma exacerbations.
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Affiliation(s)
- Priyanka Banerjee
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND, USA
| | - Premanand Balraj
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND, USA
| | | | - Sarah A Wicher
- Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Rodney D Britt
- Center for Perinatal Research, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Christina M Pabelick
- Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN, USA
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Y S Prakash
- Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN, USA
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Venkatachalem Sathish
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND, USA.
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Sudro 108A, Fargo, ND, 58108-6050, USA.
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14
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Berthon BS, McLoughlin RF, Jensen ME, Hosseini B, Williams EJ, Baines KJ, Taylor SL, Rogers GB, Ivey KL, Morten M, Da Silva Sena CR, Collison AM, Starkey MR, Mattes J, Wark PAB, Wood LG. The effects of increasing fruit and vegetable intake in children with asthma: A randomized controlled trial. Clin Exp Allergy 2021; 51:1144-1156. [PMID: 34197676 DOI: 10.1111/cea.13979] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 06/25/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND A high fruit and vegetable (F&V) diet reduces asthma exacerbations in adults; this has not been examined in children to date. OBJECTIVE To investigate the effect of a 6-month, high F&V diet on the time to first asthma exacerbation in children with asthma, in a parallel-group, randomized, controlled trial. METHODS Children (aged 3-11 years) with asthma, history of exacerbations and usual low F&V intake (≤3 serves/day) were randomized to the intervention (high F&V diet) or control group (usual diet) for 6 months. The primary outcome was time to first exacerbation requiring medical intervention. Secondary outcomes included exacerbation rate, lung function, plasma TNF-α, CRP, and IL-6, faecal microbiota and peripheral blood mononuclear cell (PBMC) histone deacetylase (HDAC) activity and G-protein coupled receptor (GPR) 41/43 and HDAC (1-11) expression. RESULTS 67 children were randomized between September 2015 and July 2018. F&V intake (difference in change (∆): 3.5 serves/day, 95% CI: [2.6, 4.4] p < 0.001) and plasma total carotenoids (∆: 0.44 µg/ml [0.19, 0.70] p = 0.001) increased after 6 months (intervention vs control). Time to first exacerbation (HR: 0.81, 95% CI: [0.38, 1.69], p = 0.569) and exacerbation rate (IRR: 0.84, [0.47, 1.49], p = 0.553) were similar between groups. In per-protocol analysis, airway reactance z-scores increased (X5 ∆: 0.76 [0.04, 1.48] p = 0.038, X20 ∆: 0.93 [0.23, 1.64] p = 0.009) and changes in faecal microbiota were observed, both in the intervention versus control group, though there was no difference between groups in systemic inflammation or molecular mechanisms. In the control group, CRP and HDAC enzyme activity increased, while GPR41 expression decreased. No adverse events attributable to the interventions were observed. CONCLUSION & CLINICAL RELEVANCE A high F&V diet did not affect asthma exacerbations over the 6-month intervention, though warrants further investigation as a strategy for improving lung function and protecting against systemic inflammation in children with asthma.
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Affiliation(s)
- Bronwyn S Berthon
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Rebecca F McLoughlin
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Megan E Jensen
- Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Banafshe Hosseini
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Evan J Williams
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Katherine J Baines
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Steven L Taylor
- Microbiome & Host Health, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Geraint B Rogers
- Microbiome & Host Health, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Kerry L Ivey
- Microbiome & Host Health, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Matthew Morten
- Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Carla R Da Silva Sena
- Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Adam M Collison
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Malcolm R Starkey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Joerg Mattes
- Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia
| | - Peter A B Wark
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia
| | - Lisa G Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpwell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
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15
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Hosseini B, Berthon BS, Starkey MR, Collison A, McLoughlin RF, Williams EJ, Nichol K, Wark PA, Jensen ME, Da Silva Sena CR, Baines KJ, Mattes J, Wood LG. Children With Asthma Have Impaired Innate Immunity and Increased Numbers of Type 2 Innate Lymphoid Cells Compared With Healthy Controls. Front Immunol 2021; 12:664668. [PMID: 34220812 PMCID: PMC8248177 DOI: 10.3389/fimmu.2021.664668] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/17/2021] [Indexed: 12/20/2022] Open
Abstract
Background Asthma is the most frequent cause of hospitalisation among children; however, little is known regarding the effects of asthma on immune responses in children. Objective The present study aimed to evaluate cytokine responses of peripheral blood mononuclear cells (PBMCs), PBMC composition and lung function in children with and without asthma. Methods Using a case-control design, we compared 48 children with asthma aged 3-11 years with 14 age-matched healthy controls. PBMC composition and cytokine production including interferon (IFN)-γ, interleukin (IL)-1β, IL-5 and lL-6 following stimulation with rhinovirus-1B (RV1B), house dust mite (HDM) and lipopolysaccharide (LPS) were measured. Lung function was assessed using impulse oscillometry and nitrogen multiple breath washout. Results The frequency of group 2 innate lymphoid cells were significantly higher in asthmatics and PBMCs from asthmatics had deficient IFN-γ production in response to both RV1B and LPS compared with controls (P<0.01). RV1B-induced IL-1β response and HDM-stimulated IL-5 production was higher in asthmatics than controls (P<0.05). In contrast, IL-1β and IL-6 were significantly reduced in response to HDM and LPS in asthmatics compared to controls (P<0.05). Children with asthma also had reduced pulmonary function, indicated by lower respiratory reactance as well as higher area of-reactance and lung clearance index values compared with controls (P<0.05). Conclusion Our study indicates that children with asthma have a reduced lung function in concert with impaired immune responses and altered immune cell subsets. Improving our understanding of immune responses to viral and bacterial infection in childhood asthma can help to tailor management of the disease.
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Affiliation(s)
- Banafshe Hosseini
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Bronwyn S Berthon
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Malcolm R Starkey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpWell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Adam Collison
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpWell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Rebecca F McLoughlin
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Evan J Williams
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Kristy Nichol
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Peter Ab Wark
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia
| | - Megan E Jensen
- Priority Research Centre GrowUpWell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Carla Rebeca Da Silva Sena
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Katherine J Baines
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Joerg Mattes
- Priority Research Centre GrowUpWell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia
| | - Lisa G Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre GrowUpWell, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
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16
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Liu J, Sun Y, Zhu B, Lin Y, Lin K, Sun Y, Yao Z, Yuan L. Identification of a potentially novel LncRNA-miRNA-mRNA competing endogenous RNA network in pulmonary arterial hypertension via integrated bioinformatic analysis. Life Sci 2021; 277:119455. [PMID: 33831428 DOI: 10.1016/j.lfs.2021.119455] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 11/18/2022]
Abstract
AIMS Pulmonary arterial hypertension (PAH) is a fatal cardiovascular disease with a cancer-like phenotype. Competing endogenous RNA (ceRNA) networks extensively involve in its pathological processes. But rare ceRNA networks and profound molecular mechanisms have been revealed in PAH. The aim of this study was to illuminate the ceRNA networks in PAH. MATERIALS AND METHODS In this work, we have chosen the idiopathic PAH as an example. GSE15197 (mRNA) and GSE56914 (miRNA) from the Gene Expression Omnibus (GEO) were selected to explore key genes and novel ceRNA networks in PAH by a series of integrated bioinformatic analysis. To be more scientific, a part of pairs in identified ceRNA network were detected in hypoxia-induced HPASMCs. And the dual-luciferase assay was performed to certify the relationship between miRNAs and mRNAs. KEY FINDINGS Totally, 311 differentially expressed genes (DEGs) were identified and functional enrichment analysis illuminated that the majority of DEGs were enriched in proliferation, anti-apoptosis, inflammation and cancer-related pathways. And 10 hub genes were determined via Cytohubba after PPI network construction. Sequentially, with stepwise reverse prediction and pan-cancer co-expression analysis from mRNA to LncRNA in TargetScan, miRNet, ENCORI (Starbase V3.0) databases, a crucially ceRNA network was identified including 14 LncRNAs, 2 miRNAs, and 3 mRNAs. Further, in hypoxia-induced HPASMCs, the alterations of mRNAs, miRNAs and LncRNAs and their relationship were in accordance with the results we identified. SIGNIFICANCE Consequently, the unique hub genes and ceRNA network we proposed may advance our understanding of the molecular mechanisms in PAH.
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Affiliation(s)
- Jiantao Liu
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Yupeng Sun
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Bingqing Zhu
- The Renji College, Wenzhou Medical University, Wenzhou, PR China
| | - Yufan Lin
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Kexin Lin
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Yiruo Sun
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Zhengze Yao
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, PR China
| | - Linbo Yuan
- Department of Physiology, Basic Medical Science School, Wenzhou Medical University, Wenzhou, PR China.
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17
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Sheikhpour M, Maleki M, Ebrahimi Vargoorani M, Amiri V. A review of epigenetic changes in asthma: methylation and acetylation. Clin Epigenetics 2021; 13:65. [PMID: 33781317 PMCID: PMC8008616 DOI: 10.1186/s13148-021-01049-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 03/04/2021] [Indexed: 12/30/2022] Open
Abstract
Several studies show that childhood and adulthood asthma and its symptoms can be modulated through epigenetic modifications. Epigenetic changes are inheritable modifications that can modify the gene expression without changing the DNA sequence. The most common epigenetic alternations consist of DNA methylation and histone modifications. How these changes lead to asthmatic phenotype or promote the asthma features, in particular by immune pathways regulation, is an understudied topic. Since external effects, like exposure to tobacco smoke, air pollution, and drugs, influence both asthma development and the epigenome, elucidating the role of epigenetic changes in asthma is of great importance. This review presents available evidence on the epigenetic process that drives asthma genes and pathways, with a particular focus on DNA methylation, histone methylation, and acetylation. We gathered and assessed studies conducted in this field over the past two decades. Our study examined asthma in different aspects and also shed light on the limitations and the important factors involved in the outcomes of the studies. To date, most of the studies in this area have been carried out on DNA methylation. Therefore, the need for diagnostic and therapeutic applications through this molecular process calls for more research on the histone modifications in this disease.
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Affiliation(s)
- Mojgan Sheikhpour
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran.
- Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran.
| | - Mobina Maleki
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
| | - Maryam Ebrahimi Vargoorani
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
- Department of Microbiology, College of Basic Sciences, Tehran North Branch, Islamic Azad University, Tehran, Iran
| | - Vahid Amiri
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
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18
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Hachim MY, Elemam NM, Ramakrishnan RK, Bajbouj K, Olivenstein R, Hachim IY, Al Heialy S, Hamid Q, Busch H, Hamoudi R. Wnt Signaling Is Deranged in Asthmatic Bronchial Epithelium and Fibroblasts. Front Cell Dev Biol 2021; 9:641404. [PMID: 33791298 PMCID: PMC8006921 DOI: 10.3389/fcell.2021.641404] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/01/2021] [Indexed: 12/16/2022] Open
Abstract
Both canonical and non-canonical Wnt signaling pathway alterations have been documented in pulmonary disease pathogenesis and progression; therefore, they can be an attractive target for pharmaceutical management of severe asthma. Wnt/β-catenin signaling was shown to link early embryonic lung development impairment to later in life asthmatic airway remodeling. Here we explored the changes in Wnt signaling associated with asthma initiation and progression in epithelial and fibroblasts using a comprehensive approach based on in silico analysis and followed by in vitro validation. In summary, the in silico analysis showed that the bronchial epithelium of severe asthmatic patients showed a deranged balance between Wnt enhancer and Wnt inhibitors. A Th2-high phenotype is associated with upregulated Wnt-negative regulators, while inflammatory and neutrophilic severe asthmatics showed higher canonical Wnt signaling member enrichment. Most of these genes are regulators of healthy lung development early in life and, if disturbed, can make people susceptible to developing asthma early in life and prone to developing a severe phenotype. Most of the Wnt members are secreted, and their effect can be in an autocrine fashion on the bronchial epithelium, paracrine on nearby adjacent structural cells like fibroblasts and smooth muscles, or systemic in blood. Our results showed that canonical Wnt signaling is needed for the proper response of cells to proliferative stimuli, which puts cells under stress. Cells in response to this proliferative stress will activate the senescence mechanism, which is also dependent on Wnt signaling. Inhibition of Wnt signaling using FH535 inhibits both proliferation and senescence markers in bronchial fibroblasts compared to DMSO-treated cells. In fibroblasts from asthmatic patients, inhibition of Wnt signaling did not show that effect as the Wnt signaling is deranged besides other pathways that might be non-functional.
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Affiliation(s)
- Mahmood Yaseen Hachim
- College of Medicine, Mohammed bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - Noha Mousaad Elemam
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Rakhee K Ramakrishnan
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Khuloud Bajbouj
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | | | - Ibrahim Yaseen Hachim
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Saba Al Heialy
- College of Medicine, Mohammed bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates.,Meakins-Christie Laboratories, McGill University, Montreal, QC, Canada
| | - Qutayba Hamid
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates.,Meakins-Christie Laboratories, McGill University, Montreal, QC, Canada
| | - Hauke Busch
- Medical Systems Biology Group, Institute for Experimental Dermatology, Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany
| | - Rifat Hamoudi
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates.,Division of Surgery and Interventional Science, University College London, London, United Kingdom
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19
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Pniewska-Dawidczyk E, Kupryś-Lipińska I, Turek G, Kacprzak D, Wieczfinska J, Kleniewska P, Kuna P, Pawliczak R. Expression of cPLA 2γ mRNA and protein differs the response of PBMC from severe and non-severe asthmatics to bacterial lipopolysaccharide and house dust mite allergen. Int J Immunopathol Pharmacol 2021; 35:2058738421990952. [PMID: 33626953 PMCID: PMC7925951 DOI: 10.1177/2058738421990952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Chronic inflammation in asthmatics is initiated/exacerbated by many environmental factors, such as bacterial lipopolysaccharide and allergens. Phospholipase A2 and histone acetyltransferase/deacetylases are enzymes involved in inflammatory process, particularly in lipid inflammatory mediators production and control of transcription of many inflammatory genes, respectively. The aim of the study was to identify differences in the inflammatory process in patients with severe and non-severe asthma, taking as a criterion expression of two groups of enzymes: phospholipases A2 and histone acetyltransferases/deacetylases. Thirty-two patients with severe, non-severe atopic to house dust mite asthmatics and 14 healthy volunteers were recruited. Peripheral blood mononuclear cells were stimulated with Dermatophagoides pteronyssinus allergen (nDer p1) and bacterial lipopolysaccharide (LPS). The expression of phospholipases A2 and histone acetyltransferases and deacetylases were assessed using TaqMan Low Density Array Cards. The protein expression was analyzed with immunoblot. Increased expression of phospholipase A2 Group IVC (PLA2G4C) and cytosolic phospholipase A2 gamma (cPLA2γ) protein was observed in peripheral blood mononuclear cells (PBMC) from severe asthmatics in response to LPS and nDer p1, compared to non-severe asthmatics. nDer p1-stimulated PBMC from severe asthmatics exhibit induced expression of HDAC1 and similar trend was observed in protein concentration. Decreased expression of EP300 occurred in PBMC of severe asthmatics. PBMC from non-severe asthmatics showed decreased expression of HDAC2 and PLA2G15 after LPS treatment. In conclusion, in response to LPS and dust mite allergen, PBMC from severe and non-severe asthmatics modulate expression of selected phospholipase A2, histone acetyltransferases and deacetylases, while increased expression of cPLA2γ characterizes PBMC response from severe asthmatics.
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Affiliation(s)
| | - Izabela Kupryś-Lipińska
- Department of Internal Medicine, Asthma and Allergy, Medical University of Lodz, Lodz, Poland
| | - Gabriela Turek
- Department of Immunopathology, Medical University of Lodz, Lodz, Poland
| | - Dorota Kacprzak
- Department of Immunopathology, Medical University of Lodz, Lodz, Poland
| | | | | | - Piotr Kuna
- Department of Internal Medicine, Asthma and Allergy, Medical University of Lodz, Lodz, Poland
| | - Rafal Pawliczak
- Department of Immunopathology, Medical University of Lodz, Lodz, Poland
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20
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Ren Y, Li M, Bai S, Kong L, Su X. Identification of histone acetylation in a murine model of allergic asthma by proteomic analysis. Exp Biol Med (Maywood) 2020; 246:929-939. [PMID: 33327783 DOI: 10.1177/1535370220980345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The pathogenesis of asthma is closely related to histone acetylation modification, but the specific acetylation sites related to this process remain indistinct. Herein, our study sought to identify differentially modified acetylation sites and their expression distribution in cells involved in asthma in lung tissues. The airway hyper-responsiveness, inflammation, and remodeling were assessed by non-invasive whole-body plethysmography, ELISA, and hematoxylin-eosin staining to confirm the successful establishment of the allergic asthma model. Afterward, the differentially modified acetylation sites in asthmatic lung tissues were identified and validated by using proteomics and western blotting, respectively. The immunohistochemistry analysis was applied to reveal the distribution of identified acetylation sites in asthmatic lung tissues. A total of 15 differentially modified acetylation sites, including 13 upregulated (H3K9ac, H3K14ac, H3K18ac, H3K23ac,H3K27ac, H3K36ac, H2B1KK120ac, H2B2BK20ac, H2BK16ac, H2BK20ac, H2BK108ac, H2BK116ac, and H2BK120ac) and 2 downregulated (H2BK5ac and H2BK11ac) sites were identified and validated. Furthermore, immunohistochemical staining of lung tissues showed that nine of the identified histone acetylation sites (H2BK5, H2BK11, H3K18, H2BK116, H2BK20, H2BK120, H3K9, H3K36, and H3K27) were differentially expressed in airway epithelial cells, and the acetylation of identified H3 histones were observed in both eosinophil and perivascular inflammatory cells. Additionally, differential expression of histone acetylation sites was also observed in nucleus of airway epithelial cells, vascular smooth muscle cells, perivascular inflammatory cells, and airway smooth muscle cells. In conclusion, we identified potential acetylation sites associated with asthma pathogenesis. These findings may contribute greatly in the search for therapeutic approaches for allergic asthma.
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Affiliation(s)
- Yuan Ren
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Menglu Li
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Shiyao Bai
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Lingfei Kong
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Xinming Su
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
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21
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De Volder J, Vereecke L, Joos G, Maes T. Targeting neutrophils in asthma: A therapeutic opportunity? Biochem Pharmacol 2020; 182:114292. [PMID: 33080186 DOI: 10.1016/j.bcp.2020.114292] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 02/06/2023]
Abstract
Suppression of airway inflammation with inhaled corticosteroids has been the key therapeutic approach for asthma for many years. Identification of inflammatory phenotypes in asthma has moreover led to important breakthroughs, e.g. with specific targeting of the IL-5 pathway as add-on treatment in difficult-to-treat eosinophilic asthma. However, the impact of interfering with the neutrophilic component in asthma is less documented and understood. This review provides an overview of established and recent insights with regard to the role of neutrophils in asthma, focusing on research in humans. We will describe the main drivers of neutrophilic responses in asthma, the heterogeneity in neutrophils and how they could contribute to asthma pathogenesis. Moreover we will describe findings from clinical trials, in which neutrophilic inflammation was targeted. It is clear that neutrophils are important actors in asthma development and play a role in exacerbations. However, more research is required to fully understand how modulation of neutrophil activity could lead to a significant benefit in asthma patients with airway neutrophilia.
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Affiliation(s)
- Joyceline De Volder
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Lars Vereecke
- VIB Inflammation Research Center, Ghent, Belgium; Ghent Gut Inflammation Group (GGIG), Ghent University, Belgium; Department of Rheumatology, Ghent University Hospital, Belgium
| | - Guy Joos
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Tania Maes
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.
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22
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Chang YS, Turturice B, Schott C, Finn P, Perkins D. Immune network dysregulation precedes clinical diagnosis of asthma. Sci Rep 2020; 10:12784. [PMID: 32732938 PMCID: PMC7393349 DOI: 10.1038/s41598-020-69494-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 07/10/2020] [Indexed: 02/05/2023] Open
Abstract
Allergic asthma is a chronic disease beginning in childhood that is characterized by dominant T-helper 2 cell activation without adequate counter-regulation by T-helper 1 cell and regulatory T cell activity. Prior transcriptomic studies of childhood asthma have primarily investigated subjects who already have a disease diagnosis, and have generally taken an approach of differential gene expression as opposed to differential gene interactions. The immune states that predispose towards allergic sensitization and disease development remain ill defined. We thus characterize immune networks of asthmatic predisposition in children at the age of 2, prior to the diagnosis of allergic asthma, who are subsequently diagnosed with asthma at the age of 7. We show extensive differences of gene expression networks and gene regulatory networks in children who develop asthma versus those who do not using transcriptomic data from stimulated peripheral blood mononuclear cells. Moreover, transcription factors that bind proximally to one another share patterns of dysregulation, suggesting that network differences prior to asthma diagnosis result from altered accessibility of gene targets. In summary, we demonstrate non-allergen-specific immune network dysregulation in individuals long before clinical asthma diagnosis.
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Affiliation(s)
- Yi-Shin Chang
- Division of Pulmonary, Critical Care, Sleep, and Allergy, Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Bioengineering, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Benjamin Turturice
- Division of Pulmonary, Critical Care, Sleep, and Allergy, Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Cody Schott
- Division of Pulmonary, Critical Care, Sleep, and Allergy, Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Patricia Finn
- Division of Pulmonary, Critical Care, Sleep, and Allergy, Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Bioengineering, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - David Perkins
- Department of Bioengineering, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
- Division of Nephrology, Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
- Department of Surgery, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
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23
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Long A, Bunning B, Sampath V, DeKruyff RH, Nadeau KC. Epigenetics and the Environment in Airway Disease: Asthma and Allergic Rhinitis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1253:153-181. [PMID: 32445095 DOI: 10.1007/978-981-15-3449-2_6] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Asthma and rhinitis are complex, heterogeneous diseases characterized by chronic inflammation of the upper and lower airways. While genome-wide association studies (GWAS) have identified a number of susceptible loci and candidate genes associated with the pathogenesis of asthma and allergic rhinitis (AR), the risk-associated alleles account for only a very small percent of the genetic risk. In allergic airway and other complex diseases, it is thought that epigenetic modifications, including DNA methylation, histone modifications, and non-coding microRNAs, caused by complex interactions between the underlying genome and the environment may account for some of this "missing heritability" and may explain the high degree of plasticity in immune responses. In this chapter, we will focus on the current knowledge of classical epigenetic modifications, DNA methylation and histone modifications, and their potential role in asthma and AR. In particular, we will review epigenetic variations associated with maternal airway disease, demographics, environment, and non-specific associations. The role of specific genetic haplotypes in environmentally induced epigenetic changes are also discussed. A major limitation of many of the current studies of asthma epigenetics is that they evaluate epigenetic modifications in both allergic and non-allergic asthma, making it difficult to distinguish those epigenetic modifications that mediate allergic asthma from those that mediate non-allergic asthma. Additionally, most DNA methylation studies in asthma use peripheral or cord blood due to poor accessibility of airway cells or tissue. Unlike DNA sequences, epigenetic alterations are quite cell- and tissue-specific, and epigenetic changes found in airway tissue or cells may be discordant from that of circulating blood. These two confounding factors should be considered when reviewing epigenetic studies in allergic airway disease.
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Affiliation(s)
- Andrew Long
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford, CA, 94305, USA.,Department of Pharmacy, Lucile Packard Children's Hospital, Stanford, CA, 94304, USA
| | - Bryan Bunning
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford, CA, 94305, USA
| | - Vanitha Sampath
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford, CA, 94305, USA
| | - Rosemarie H DeKruyff
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford, CA, 94305, USA
| | - Kari C Nadeau
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Sean N. Parker Center for Allergy and Asthma Research at Stanford University, Stanford, CA, 94305, USA.
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24
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Galvão I, Kim RY, Shen S, Budden KF, Vieira AT, Hansbro PM. Emerging therapeutic targets and preclinical models for severe asthma. Expert Opin Ther Targets 2020; 24:845-857. [PMID: 32569487 DOI: 10.1080/14728222.2020.1786535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Asthma is a heterogeneous disease with complex multifactorial causes. It is possible to subclassify asthma into different phenotypes that have distinct immunological features. Eosinophilic asthma is a well-known phenotype of severe asthma; however, a large body of clinical and experimental evidence strongly associates persistent airway inflammation, including the accumulation of neutrophils in the bronchial mucosa, and resistance to corticosteroid therapy and non-Type-2 immune responses with severe asthma. Importantly, mainstay therapies are often ineffective in severe asthma and effective alternatives are urgently needed. AREAS COVERED Here, we discussed recently developed mouse models of severe asthma that recapitulates key features of the disease in humans. We also provide findings from clinically relevant experimental models that have identified potential therapeutic targets for severe asthma. The most relevant publications on the topic of interest were selected from PubMed. EXPERT COMMENTARY Increasing the understanding of disease-causing mechanisms in severe asthma may lead to the identification of novel therapeutic targets and the development of more effective therapies. Intense research interest into investigating the pathophysiological mechanisms of severe asthma has driven the development and interrogation of a myriad of mouse models that aim to replicate hallmark features of severe asthma in humans.
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Affiliation(s)
- Izabela Galvão
- Centre for Inflammation, Centenary Institute and University of Technology Sydney , Sydney, Australia
| | - Richard Y Kim
- Centre for Inflammation, Centenary Institute and University of Technology Sydney , Sydney, Australia.,Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle , Newcastle, Australia
| | - Sijie Shen
- Centre for Inflammation, Centenary Institute and University of Technology Sydney , Sydney, Australia
| | - Kurtis F Budden
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle , Newcastle, Australia
| | - Angélica T Vieira
- Laboratory of Microbiota and Immunomodulation, Department of Biochemistry and Immunology, Instituto De Ciências Biológicas, Federal University of Minas Gerais , Belo Horizonte, Brazil
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney , Sydney, Australia.,Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle , Newcastle, Australia
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25
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Louhaichi S, Mlika M, Hamdi B, Hamzaoui K, Hamzaoui A. Sputum IL-26 Is Overexpressed in Severe Asthma and Induces Proinflammatory Cytokine Production and Th17 Cell Generation: A Case-Control Study of Women. J Asthma Allergy 2020; 13:95-107. [PMID: 32099415 PMCID: PMC7006858 DOI: 10.2147/jaa.s229522] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 01/12/2020] [Indexed: 12/16/2022] Open
Abstract
Objective Asthma inflammation is a complex pathway involving numerous mediators. Interleukin-26 (IL-26), a member of the IL-10 cytokine family, is abundant in human airways and induces the production of proinflammatory cytokines. Our aim was to investigate the possible role of IL-26 in severe asthma. We analysed the expression of IL-26 in severe asthma both in peripheral blood and induced sputum. Patients and Methods A total of 50 adult women with severe asthma were recruited and compared to 30 healthy controls (HC). Serum and sputum fluid (SF) levels of IL-26 and IL-17 were defined by ELISA. IL-26 mRNA expression and IL-26 protein were analysed using RT-PCR and Western blot. In vitro, we studied the effect of recombinant IL-26 (rIL-26) and SF-IL-26 on cultured CD4+ T cells and monocytes, comparing patients and controls. Results Concentrations of IL-26 are higher in serum and induced sputum of asthmatic patients than in HC. Moreover, IL-26 protein and mRNA expression were significantly elevated in asthma sputum cells compared to PBMCs. We observed a positive correlation between body mass index (BMI) and sputum fluid IL-26, while the correlation between IL-26 and lung function tests (FEV1% and FEV1/FVC ratio) was negative. IL-17A was highly expressed in SF and correlated positively with IL-26. In patients’ sputum IL-26 and IL-17A were significantly associated with neutrophils. Stimulation of cultured CD4+ T cells with monocytes by recombinant IL-26 promoted the generation of RORγt+ Th17+ cells inducing the production of IL-17A, IL-1β, IL-6 and TNF-α cytokines. IL-26 expressed in SF was biologically active and induced IL-17 secretion in the presence of IL-1β and IL-6 cytokines. Conclusion These findings show that IL-26 is highly produced in asthmatic sputum, induces pro-inflammatory cytokine secretion by monocytes/macrophages, and favours Th17 cell generation. IL-26 thereby appears as a novel pro-inflammatory cytokine, produced locally in the airways that may constitute a promising target to treat asthma inflammatory process.
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Affiliation(s)
- Sabrine Louhaichi
- Research Laboratory 19SP02 "Chronic Pulmonary Pathologies: From Genome to Management", Abderrahman Mami Hospital, Ariana, Tunisia.,Medicine Faculty of Tunis, Department of Basic Sciences, Tunis El Manar University, Tunis, Tunisia.,Department of Paediatric and Respiratory Diseases, Abderrahman Mami Hospital, Pavillon B, Ariana, Tunisia
| | - Mona Mlika
- Medicine Faculty of Tunis, Department of Basic Sciences, Tunis El Manar University, Tunis, Tunisia.,Pathology Department, Abderrahman Mami Hospital, Ariana, Tunisia
| | - Besma Hamdi
- Research Laboratory 19SP02 "Chronic Pulmonary Pathologies: From Genome to Management", Abderrahman Mami Hospital, Ariana, Tunisia.,Medicine Faculty of Tunis, Department of Basic Sciences, Tunis El Manar University, Tunis, Tunisia.,Department of Paediatric and Respiratory Diseases, Abderrahman Mami Hospital, Pavillon B, Ariana, Tunisia
| | - Kamel Hamzaoui
- Research Laboratory 19SP02 "Chronic Pulmonary Pathologies: From Genome to Management", Abderrahman Mami Hospital, Ariana, Tunisia.,Medicine Faculty of Tunis, Department of Basic Sciences, Tunis El Manar University, Tunis, Tunisia
| | - Agnès Hamzaoui
- Research Laboratory 19SP02 "Chronic Pulmonary Pathologies: From Genome to Management", Abderrahman Mami Hospital, Ariana, Tunisia.,Medicine Faculty of Tunis, Department of Basic Sciences, Tunis El Manar University, Tunis, Tunisia.,Department of Paediatric and Respiratory Diseases, Abderrahman Mami Hospital, Pavillon B, Ariana, Tunisia
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26
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Wadhwa R, Dua K, Adcock IM, Horvat JC, Kim RY, Hansbro PM. Cellular mechanisms underlying steroid-resistant asthma. Eur Respir Rev 2019; 28:28/153/190096. [PMID: 31636089 DOI: 10.1183/16000617.0096-2019] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 09/19/2019] [Indexed: 01/04/2023] Open
Abstract
Severe steroid-resistant asthma is clinically important, as patients with this form of the disease do not respond to mainstay corticosteroid therapies. The heterogeneity of this form of asthma and poor understanding of the pathological mechanisms involved hinder the identification of therapeutic targets and the development of more effective therapies. A major limiting factor in the understanding of severe steroid-resistant asthma is the existence of multiple endotypes represented by different immunological and inflammatory phenotypes, particularly in adults. Several clinical and experimental studies have revealed associations between specific respiratory infections and steroid-resistant asthma in adults. Here, we discuss recent findings from other authors as well as our own studies that have developed novel experimental models for interrogating the association between respiratory infections and severe steroid-resistant asthma. These models have enabled the identification of new therapies using macrolides, as well as several novel disease mechanisms, including the microRNA-21/phosphoinositide 3-kinase/histone deacetylase 2 axis and NLRP3 inflammasomes, and highlight the potential of these mechanisms as therapeutic targets.
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Affiliation(s)
- Ridhima Wadhwa
- Centre for Inflammation, Centenary Institute, Sydney, Australia.,Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Sydney, Australia.,Both authors contributed equally
| | - Kamal Dua
- Centre for Inflammation, Centenary Institute, Sydney, Australia.,Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Sydney, Australia.,Priority Research Centre for Healthy Lungs, University of Newcastle and Hunter Medical Research Institute, Newcastle, Australia.,Both authors contributed equally
| | - Ian M Adcock
- The Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Jay C Horvat
- Priority Research Centre for Healthy Lungs, University of Newcastle and Hunter Medical Research Institute, Newcastle, Australia
| | - Richard Y Kim
- Centre for Inflammation, Centenary Institute, Sydney, Australia.,Priority Research Centre for Healthy Lungs, University of Newcastle and Hunter Medical Research Institute, Newcastle, Australia.,Faculty of Science, University of Technology Sydney, Sydney, Australia
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute, Sydney, Australia.,Priority Research Centre for Healthy Lungs, University of Newcastle and Hunter Medical Research Institute, Newcastle, Australia.,Faculty of Science, University of Technology Sydney, Sydney, Australia
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27
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Cheng Q, Shang Y, Huang W, Zhang Q, Li X, Zhou Q. p300 mediates the histone acetylation of ORMDL3 to affect airway inflammation and remodeling in asthma. Int Immunopharmacol 2019; 76:105885. [PMID: 31536903 DOI: 10.1016/j.intimp.2019.105885] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/20/2019] [Accepted: 09/05/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Bronchial asthma is affected by both environmental and genetic factors. The orosomucoid 1-like protein 3 (ORMDL3) gene is related to childhood asthma and is involved in airway inflammation and airway remodeling. The ORMDL3 promoter contains binding sites for the histone acetylase p300. Gene expression can be affected by epigenetic modifications. This study aimed to investigate whether the p300-mediated histone acetylation (HAT) of ORMDL3 gene affects airway inflammation and remodeling in asthma. METHODS 16HBE14o- cells were transfected with various concentrations of a wild-type p300 plasmid or p300HAT-deletion plasmids. A dual luciferase reporter assay was used to examine the effect of p300-mediated HAT on the ORMDL3 promoter. Thirty BALB/c mice were randomly divided into a control group, an ovalbumin (OVA)-induced asthma group and an asthma + C646 (a selective inhibitor of p300) group. Noninvasive lung function tests were conducted to examine airway hyperreactivity (AHR) in the different groups. HE and Masson's trichrome staining was performed to examine airway remodeling and inflammation. Immunohistochemistry, western blotting and real-time PCR were used to analyze ORMDL3 expression in lung tissues. ELISA and western blotting were used to evaluate the HAT status in lung tissue. The ChIP assay was used to determine the relationship of the ORMDL3 promoter to p300 or acetylated histone H3 (aceH3). RESULTS p300 activated transcription from the ORMDL3 promoter, resulting in an increase in endogenous ORMDL3 mRNA levels. ORMDL3 promoter activity was reduced when the HAT activity of p300 was lost. ORMDL3 expression was elevated, and HAT activity was high in the lung tissues of asthmatic mice. p300 and aceH3 bound to the promoter region of ORMDL3. In the asthma group, the amounts of p300 and aceH3 recruited to the ORMDL3 promoter were increased. C646 inhibited p300 expression and reduced HAT activity and aceH3 levels in asthmatic mice, thereby reducing ORMDL3 expression and relieving AHR and airway remodeling. CONCLUSION p300-mediated HAT modulates the expression of the asthma susceptibility gene ORMDL3, thereby improving the process of airway inflammation and remodeling in asthma.
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Affiliation(s)
- Qi Cheng
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China.
| | - Yunxiao Shang
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China.
| | - Wanjie Huang
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China
| | - Qinzhen Zhang
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China
| | - Xiang Li
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China
| | - Qianlan Zhou
- Pediatric Pulmonology Department, Shengjing Hospital of China Medical University, 36th Sanhao Street, Heping District, Shenyang 110004, PR China
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28
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Hirai K, Shirai T, Rachi Y, Uehara S, Ueda M, Nakatani E, Itoh K. Impact of Gene Expression Associated with Glucocorticoid-Induced Transcript 1 (GLCCI1) on Severe Asthma and Future Exacerbation. Biol Pharm Bull 2019; 42:1746-1752. [PMID: 31391381 DOI: 10.1248/bpb.b19-00476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Genetic variations in glucocorticoid-induced transcript 1 (GLCCI1) have been associated with the response to corticosteroid treatment. However, the associations of GLCCI1 polymorphisms or gene expression with the prognosis of asthma and pathophysiological factors related to steroid insensitivity remain unclear. We sought to investigate the associations of GLCCI1, nuclear factor (erythroid-derived 2)-like 2 (Nrf2), and histone deacetylase 2 (HDAC2) mRNA expression levels and the GLCCI1 rs37973 polymorphism with asthma severity and future exacerbation in patients with asthma. Subjects included 25 patients with severe asthma and 127 patients with nonsevere asthma. mRNA expression levels in peripheral blood mononuclear cells were measured and evaluated as predictors of severe asthma using receiver operating characteristic (ROC) analysis. The hazard ratios of the mRNA expression levels for time to first exacerbation in the 1-year follow-up period were calculated. GLCCI1, Nrf2, and HDAC2 mRNA expression levels were significantly lower in patients with severe asthma than in patients with nonsevere asthma and could predict severe asthma with an area under the ROC curve of 0.68, 0.71, and 0.65, respectively. In contrast, no relationship was found between the GLCCI1 rs37973 polymorphism and severe asthma. The hazard ratios for asthma exacerbation in patients with low GLCCI1, Nrf2, and HDAC2 mRNA expression levels were 3.24 (95% confidence interval, 1.42-7.40), 3.13 (1.37-7.16), and 2.98 (1.22-7.25), respectively. Patients with severe asthma could be distinguished by lower GLCCI1, Nrf2, and HDAC2 mRNA levels in peripheral blood cells, and all of these gene signatures could predict future asthma exacerbations.
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Affiliation(s)
- Keita Hirai
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka.,Laboratory of Clinical Pharmacogenomics, Shizuoka General Hospital
| | | | - Yuuka Rachi
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka
| | - Sekiko Uehara
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka
| | - Megumi Ueda
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka
| | - Eiji Nakatani
- Division of Statistical Analysis, Research Support Center, Shizuoka General Hospital
| | - Kunihiko Itoh
- Department of Clinical Pharmacology & Genetics, School of Pharmaceutical Sciences, University of Shizuoka.,Laboratory of Clinical Pharmacogenomics, Shizuoka General Hospital
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29
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Soluble fibre supplementation with and without a probiotic in adults with asthma: A 7-day randomised, double blind, three way cross-over trial. EBioMedicine 2019; 46:473-485. [PMID: 31375426 PMCID: PMC6712277 DOI: 10.1016/j.ebiom.2019.07.048] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 12/14/2022] Open
Abstract
Background Soluble fibre modulates airway inflammation in animal models. The aim of this study was to investigate the effects of soluble fibre supplementation, with and without a probiotic, on plasma short chain fatty acids (SCFA), airway inflammation, asthma control and gut microbiome in adults with asthma. Methods A randomised, double-blinded, placebo controlled 3-way cross-over trial in 17 subjects with stable asthma at the Hunter Medical Research Institute, Newcastle, Australia. Subjects received 3 × 7 day oral interventions in random order; soluble fibre (inulin 12 g/day), soluble fibre + probiotic (inulin 12 g/day + multi-strain probiotic >25 billion CFU) and placebo. Plasma SCFA, sputum cell counts and inflammatory gene expression, asthma control gut microbiota, adverse events including gastrointestinal symptoms were measured. Findings There was no difference in change in total plasma SCFA levels (μmol/L) in the placebo versus soluble fibre (Δmedian [95% CI] 16·3 [−16·9, 49·5], p = 0·335) or soluble fibre+probiotic (18·7 [−14·5, 51·9], p = 0·325) group. Following the soluble fibre intervention there was an improvement in the asthma control questionnaire (ACQ6) (∆median (IQR) -0·35 (−0·5, −0·13), p = 0·006), sputum %eosinophils decreased (−1.0 (−2·5, 0), p = 0·006) and sputum histone deacetylase 9 (HDAC9) gene expression decreased (−0.49 (−0.83, −0.27) 2-ΔCt, p = .008). Individual bacterial operational taxonomic units changed following both inulin and inulin+probiotic arms. Interpretation Soluble fibre supplementation for 7 days in adults with asthma did not change SCFA levels. Within group analysis showed improvements in airway inflammation, asthma control and gut microbiome composition following inulin supplementation and these changes warrant further investigation, in order to evaluate the potential of soluble fibre as a non-pharmacological addition to asthma management. Fund John Hunter Hospital Charitable Trust.
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Boltz TA, Khuri S, Wuchty S. Promoter conservation in HDACs points to functional implications. BMC Genomics 2019; 20:613. [PMID: 31351464 PMCID: PMC6660948 DOI: 10.1186/s12864-019-5973-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 07/12/2019] [Indexed: 01/05/2023] Open
Abstract
Background Histone deacetylases (HDACs) are the proteins responsible for removing the acetyl group from lysine residues of core histones in chromosomes, a crucial component of gene regulation. Eleven known HDACs exist in humans and most other vertebrates. While the basic function of HDACs has been well characterized and new discoveries are still being made, the transcriptional regulation of their corresponding genes is still poorly understood. Results Here, we conducted a computational analysis of the eleven HDAC promoter sequences in 25 vertebrate species to determine whether transcription factor binding sites (TFBSs) are conserved in HDAC evolution, and if so, whether they provide useful information about HDAC expression and function. Furthermore, we used tissue-specific information of transcription factors to investigate the potential expression patterns of HDACs in different human tissues based on their transcription factor binding sites. We found that the TFBS profiles of most of the HDACs were well conserved in closely related species for all HDAC promoters except HDAC7 and HDAC10. HDAC5 had particularly strong conservation across over half of the species studied, with nearly identical profiles in the primate species. Our comparisons of TFBSs with the tissue specific gene expression profiles of their corresponding TFs showed that most HDACs had the ability to be ubiquitously expressed. A few HDAC promoters exhibited the potential for preferential expression in certain tissues, most notably HDAC11 in gall bladder, while HDAC9 seemed to have less propensity for expression in the nervous system. Conclusions In general, we found evolutionary conservation in HDAC promoters that seems to be more prominent for the ubiquitously expressed HDACs. In turn, when conservation did not follow usual phylogeny, human TFBS patterns indicated possible functional relevance. While we found that HDACs appear to uniformly expressed, we confirm that the functional differences in HDACs may be less a matter of location of activity than a question of which proteins and which acetyl groups they may be acting on. Electronic supplementary material The online version of this article (10.1186/s12864-019-5973-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Toni A Boltz
- Department of Computer Science, University of Miami, Coral Gables, FL, USA.,Present address: University of California, Los Angeles, Los Angeles, CA, USA
| | - Sawsan Khuri
- University of Exeter College of Medicine and Health, Exeter, UK
| | - Stefan Wuchty
- Department of Computer Science, University of Miami, Coral Gables, FL, USA. .,Department of Biology, University of Miami, Coral Gables, FL, USA. .,Center of Computational Science, University of Miami, Coral Gables, FL, USA. .,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, USA.
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Genetic Architectures of Childhood- and Adult-Onset Asthma Are Partly Distinct. Am J Hum Genet 2019; 104:665-684. [PMID: 30929738 DOI: 10.1016/j.ajhg.2019.02.022] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 02/20/2019] [Indexed: 12/13/2022] Open
Abstract
The extent to which genetic risk factors are shared between childhood-onset (COA) and adult-onset (AOA) asthma has not been estimated. On the basis of data from the UK Biobank study (n = 447,628), we found that the variance in disease liability explained by common variants is higher for COA (onset at ages between 0 and 19 years; h2g = 25.6%) than for AOA (onset at ages between 20 and 60 years; h2g = 10.6%). The genetic correlation (rg) between COA and AOA was 0.67. Variation in age of onset among COA-affected individuals had a low heritability (h2g = 5%), which we confirmed in independent studies and also among AOA-affected individuals. To identify subtype-specific genetic associations, we performed a genome-wide association study (GWAS) in the UK Biobank for COA (13,962 affected individuals) and a separate GWAS for AOA (26,582 affected individuals) by using a common set of 300,671 controls for both studies. We identified 123 independent associations for COA and 56 for AOA (37 overlapped); of these, 98 and 34, respectively, were reproducible in an independent study (n = 262,767). Collectively, 28 associations were not previously reported. For 96 COA-associated variants, including five variants that represent COA-specific risk factors, the risk allele was more common in COA- than in AOA-affected individuals. Conversely, we identified three variants that are stronger risk factors for AOA. Variants associated with obesity and smoking had a stronger contribution to the risk of AOA than to the risk of COA. Lastly, we identified 109 likely target genes of the associated variants, primarily on the basis of correlated expression quantitative trait loci (up to n = 31,684). GWAS informed by age of onset can identify subtype-specific risk variants, which can help us understand differences in pathophysiology between COA and AOA and so can be informative for drug development.
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Abstract
Serotonin (5-hydroxytryptamine, 5-HT)2A receptor agonists have recently emerged as promising new treatment options for a variety of disorders. The recent success of these agonists, also known as psychedelics, like psilocybin for the treatment of anxiety, depression, obsessive-compulsive disorder (OCD), and addiction, has ushered in a renaissance in the way these compounds are perceived in the medical community and populace at large. One emerging therapeutic area that holds significant promise is their use as anti-inflammatory agents. Activation of 5-HT2A receptors produces potent anti-inflammatory effects in animal models of human inflammatory disorders at sub-behavioural levels. This review discusses the role of the 5-HT2A receptor in the inflammatory response, as well as highlight studies using the 5-HT2A agonist (R)-2,5-dimethoxy-4-iodoamphetamine [(R)-DOI] to treat inflammation in cellular and animal models. It also examines potential mechanisms by which 5-HT2A agonists produce their therapeutic effects. Overall, psychedelics regulate inflammatory pathways via novel mechanisms, and may represent a new and exciting treatment strategy for several inflammatory disorders.
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Affiliation(s)
- Thomas W Flanagan
- a Department of Pharmacology and Experimental Therapeutics , Louisiana State University Health Sciences Center , New Orleans , LA , USA
| | - Charles D Nichols
- a Department of Pharmacology and Experimental Therapeutics , Louisiana State University Health Sciences Center , New Orleans , LA , USA
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Cao XY, Xiao SY. Chronic lung disease, lung regeneration and future therapeutic strategies. Chronic Dis Transl Med 2018; 4:103-108. [PMID: 29988916 PMCID: PMC6034004 DOI: 10.1016/j.cdtm.2018.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Indexed: 11/21/2022] Open
Abstract
Chronic lung diseases have been recognized as one of the world's leading causes of death in recent decades. Lacking effective treatments brings the patients not only bad quality of life but also higher risk for lung cancer development. By increasing the understanding of deeper mechanism of how lung develops and regenerates, researchers now focus on studying lung regenerative medicine, aiming to apply different and more efficient therapies to treat chronic lung diseases. This review will provide a wide picture of both basic lung developmental, regeneration mechanism and different designed strategies for treating chronic lung diseases in the future decades.
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Affiliation(s)
- Xuan-Ye Cao
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Corresponding author.
| | - Si-Yu Xiao
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77004, USA
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Valproic Acid Downregulates Cytokine Expression in Human Macrophages Infected with Dengue Virus. Diseases 2018; 6:diseases6030059. [PMID: 29986388 PMCID: PMC6165057 DOI: 10.3390/diseases6030059] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/25/2018] [Accepted: 07/05/2018] [Indexed: 02/07/2023] Open
Abstract
Natural infection with dengue virus (DENV) induces an increase in the production of cytokines that play an important role in disease pathogenesis. Despite numerous scientific studies, there are still no commercially available disease-specific therapeutics. Previous evidence shows that inhibiting histone deacetylase enzymes (HDACs) regulates the immune response in several inflammatory disease models. The aim of the current study was to evaluate the effect of HDAC inhibition in the production of inflammatory cytokines in human monocyte-derived macrophages infected with DENV serotype 2 (DENV-2). To this end, human monocyte-derived macrophages (MDMs) were treated with valproic acid (VPA) before or after infection and the inflammatory cytokine concentration was quantified by flow cytometry. We found that infected MDMs secreted IL-8, IL-1b, IL-6, TNF-alpha, and IL-10, but not IL-12. Strikingly, treatment of infected cells with VPA had a differential and concentration-dependent effect on the production of specific cytokines without eliciting significant changes in cell viability. Using the highest concentration of VPA, a significant reduction in the production of all cytokines was observed. These results suggest that HDAC inhibition during DENV-2 infection could exert an important regulatory effect in the production of inflammatory cytokines, representing a significant advance in the design of novel therapeutic dengue treatments.
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Inhibition of BET bromodomains restores corticosteroid responsiveness in a mixed granulocytic mouse model of asthma. Biochem Pharmacol 2018; 154:222-233. [PMID: 29777682 DOI: 10.1016/j.bcp.2018.05.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 05/15/2018] [Indexed: 12/28/2022]
Abstract
Asthma is a heterogeneous disease characterized by different endotypes/phenotypes. Th2/Th17 driven mixed granulocytic asthma is one of them and shows resistance to corticosteroid therapy. Bromodomain and extra-terminal (BET) proteins are required for differentiation of Th17 cells which play a pivotal role in neutrophilic inflammation. Therefore, we sought to characterize the differential effects of BET inhibitor versus corticosteroids, and their potential synergism in cockroach allergen extract (CE)-induced mixed granulocytic (eosinophilic and neutrophilic) mouse model of asthma having Th2/Th17 endotype. Effects of BET inhibitor, (+)JQ-1 alone and in combination with dexamethasone (Dexa) were assessed on airway inflammation as well as Th2/Th17 related airway immune responses in CE-induced mixed granulocytic asthma. Markers of steroid resistance [histone deacetylase 2 (HDAC2), and oxidative stress] were also assessed in the lungs of mice and primary human bronchial epithelial cells (HBECs). BET inhibitor, (+)JQ-1 abolished Th17 driven neutrophilic inflammation in CE-induced mixed granulocytic asthma. Dexa had limited effect on overall airway inflammation despite having significant reductions in Th2 driven immune responses. However, combination of (+)JQ-1 with Dexa completely blocked both Th2 and /Th17 driven immune responses in the lung which led to significant reductions in eosinophils, neutrophils, and mucin secretion. (+)JQ-1 also reversed CE- and IL-17A-induced decrease in HDAC2 expression in murine and human airway epithelial cells respectively.
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Hansbro PM, Kim RY, Starkey MR, Donovan C, Dua K, Mayall JR, Liu G, Hansbro NG, Simpson JL, Wood LG, Hirota JA, Knight DA, Foster PS, Horvat JC. Mechanisms and treatments for severe, steroid-resistant allergic airway disease and asthma. Immunol Rev 2018; 278:41-62. [PMID: 28658552 DOI: 10.1111/imr.12543] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Severe, steroid-resistant asthma is clinically and economically important since affected individuals do not respond to mainstay corticosteroid treatments for asthma. Patients with this disease experience more frequent exacerbations of asthma, are more likely to be hospitalized, and have a poorer quality of life. Effective therapies are urgently required, however, their development has been hampered by a lack of understanding of the pathological processes that underpin disease. A major obstacle to understanding the processes that drive severe, steroid-resistant asthma is that the several endotypes of the disease have been described that are characterized by different inflammatory and immunological phenotypes. This heterogeneity makes pinpointing processes that drive disease difficult in humans. Clinical studies strongly associate specific respiratory infections with severe, steroid-resistant asthma. In this review, we discuss key findings from our studies where we describe the development of representative experimental models to improve our understanding of the links between infection and severe, steroid-resistant forms of this disease. We also discuss their use in elucidating the mechanisms, and their potential for developing effective therapeutic strategies, for severe, steroid-resistant asthma. Finally, we highlight how the immune mechanisms and therapeutic targets we have identified may be applicable to obesity-or pollution-associated asthma.
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Affiliation(s)
- Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Richard Y Kim
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Malcolm R Starkey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Chantal Donovan
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Kamal Dua
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jemma R Mayall
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Gang Liu
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Nicole G Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jodie L Simpson
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Lisa G Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jeremy A Hirota
- James Hogg Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Darryl A Knight
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Paul S Foster
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jay C Horvat
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
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Yang G, Cheng BH, Yang SB, Liu ZQ, Qiu SQ, Yang LT, Xie RD, Geng XR, Li MG, Gao L, Liu ZG, Yang PC. Targeting histone-acetyltransferase Tat-interactive protein 60 inhibits intestinal allergy. Allergy 2018; 73:387-394. [PMID: 28871603 DOI: 10.1111/all.13304] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND The overproduction of IgE plays a critical role in the pathogenesis of allergy; the mechanism is unclear. Histone-acetyltransferase (HAT) activities are required in gene transcription of a large number of molecules in the immune system of the body. OBJECTIVES This study tests a hypothesis that HAT Tat-interactive protein 60 (Tip60) plays an important role in the initiation of IgE-mediated allergy. METHODS The effects of Tip60 on regulating IgE expression were assessed with B cells. An intestinal allergy mouse model was developed to assess the role of Tip60 in the induction of IgE-mediated allergic inflammation. RESULTS High levels of Tip60 were observed in the peripheral B cells of patients with FA. Tat-interactive protein 60 (Tip60) was required in the expression of IgE and IgG1 in B cells by inducing the chromatin remolding at the gene locus, in which histone acetylation, signal transducer and activator of transcription 6 (STAT6), and nuclear factor-κB at the locus of Iε promoter were markedly increased. Blocking Tip60 significantly attenuated the allergic inflammation in the mouse intestinal mucosa. CONCLUSIONS Tat-interactive protein 60 (Tip60) plays an important role in the induction of IgE in B cells. Blocking Tip60 inhibits the allergic inflammation in the intestine, suggesting Tip60 inhibitor may be a potential anti-allergy drug.
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Affiliation(s)
- G. Yang
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
- The Brain Body Institute; McMaster University; Hamilton ON Canada
| | - B.-H. Cheng
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - S.-B. Yang
- Department of Cadre Clinic; Chinese PLA General Hospital; Beijing China
| | - Z.-Q. Liu
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
- The Brain Body Institute; McMaster University; Hamilton ON Canada
| | - S.-Q. Qiu
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - L.-T. Yang
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
- The Brain Body Institute; McMaster University; Hamilton ON Canada
| | - R.-D. Xie
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - X.-R. Geng
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
- The Brain Body Institute; McMaster University; Hamilton ON Canada
| | - M.-G. Li
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - L. Gao
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - Z.-G. Liu
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
| | - P.-C. Yang
- The Affiliated ENT Hospital and the Research Center of Allergy & Immunology; Shenzhen University School of Medicine; Shenzhen China
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Ho RH, Chan JCY, Fan H, Kioh DYQ, Lee BW, Chan ECY. In Silico and in Vitro Interactions between Short Chain Fatty Acids and Human Histone Deacetylases. Biochemistry 2017; 56:4871-4878. [PMID: 28809557 DOI: 10.1021/acs.biochem.7b00508] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Short chain fatty acids (SCFAs) are postulated to modulate the immune development of neonates via epigenetic regulations such as histone deacetylase (HDAC) inhibition. In the context of atopic diseases, the inhibition of HDAC maintains T-cell homeostasis and induces naïve T-cell differentiation into adaptive Treg, which regulates the production of anti-inflammatory cytokines and suppression of Th2 immune responses. We investigated the structure-inhibition relationships of SCFAs with class I HDAC3 and class IIa HDAC7 using in silico docking simulation and the in vitro human recombinant HDAC inhibition assay. In silico docking simulation demonstrated that the lower binding energy of SCFAs toward HDACs was associated with the longer aliphatic chain length of SCFAs. Conversely, branching of SCFAs increased their binding energies toward both HDAC3 and HDAC7. The in vitro HDAC inhibition assay revealed that SCFAs more potently inhibit HDAC3 than HDAC7, with butyric acid being the most potent HDAC3 inhibitor among SCFAs (IC50 = 0.318 mM). In conclusion, our findings inform novel structural relationships between SCFAs and HDAC3 versus HDAC7. Future investigation of human disposition of SCFAs is important to establish their effects on innate versus adaptive immunity.
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Affiliation(s)
- Rou Hui Ho
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543
| | - James Chun Yip Chan
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543
| | - Hao Fan
- Bioinformatics Institute , 30 Biopolis Street, #07-01 Matrix, Singapore 138671.,Department of Biological Sciences, National University of Singapore , 14 Science Drive 4, Singapore 117545
| | - Dorinda Yan Qin Kioh
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543
| | - Bee Wah Lee
- Department of Pediatrics, National University Health System , 5 Lower Kent Ridge Road, Singapore 119074
| | - Eric Chun Yong Chan
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543.,Brenner Centre for Molecular Medicine, Singapore Institute for Clinical Sciences (SICS) , 30 Medical Drive, Singapore 117609
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van den Bosch T, Kwiatkowski M, Bischoff R, Dekker FJ. Targeting transcription factor lysine acetylation in inflammatory airway diseases. Epigenomics 2017; 9:1013-1028. [PMID: 28617138 DOI: 10.2217/epi-2017-0027] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Asthma and chronic obstructive pulmonary disease are inflammatory airway diseases for which alternative therapeutic strategies are urgently needed. Interestingly, HDAC inhibitors show anti-inflammatory effects in mouse models for these diseases. Here we explore underlying mechanisms that may explain these effects. In previous studies, effects of HDAC inhibitors on histone acetylation are often correlated with their effects on gene expression. However, effects of HDAC inhibitors on transcription factors and their acetylation status may be particularly important in explaining these effects. These effects are also cell type-specific. Recent developments (including chemoproteomics and acetylomics) allow for a more detailed understanding of the selectivity of HDAC inhibitors, which will drive their further development into applications in inflammatory airway diseases.
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Affiliation(s)
- Thea van den Bosch
- University of Groningen, Groningen Research Institute of Pharmacy (GRIP), Department of Chemical & Pharmaceutical Biology, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Marcel Kwiatkowski
- University of Groningen, University Medical Center Groningen, Department of Pulmonary Diseases & Tuberculosis, Hanzeplein 1, 9713 AV, Groningen, The Netherlands
| | - Rainer Bischoff
- University of Groningen, Groningen Research Institute of Pharmacy (GRIP), Department of Analytical Biochemistry, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Frank J Dekker
- University of Groningen, Groningen Research Institute of Pharmacy (GRIP), Department of Chemical & Pharmaceutical Biology, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
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Developmental pathways in lung regeneration. Cell Tissue Res 2016; 367:677-685. [PMID: 27957616 DOI: 10.1007/s00441-016-2537-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 11/13/2016] [Indexed: 01/10/2023]
Abstract
The key processes of lung development have been elucidated in the past several decades, helping to identify and characterize the resident progenitor cells that ultimately generate the mature organ. The adult lung is a complex organ consisting in scores of different cell lineages that are remarkably quiescent in the absence of injury. Despite low cellular turnover, the lung can respond quickly and dramatically to acute damage, with spatially restricted stem and progenitor cells re-entering the cell cycle and differentiating to promote repair. The findings from lung developmental biology are now being used to examine the mechanisms that underlie lung regeneration. The use of in vitro models such as pluripotent stem cells and new methods of gene editing have provided models for understanding lung disease and exploring the mechanisms of lung regeneration and have raised the prospect of correcting lung dysfunction. We outline the way that basic studies into lung developmental biology are now being applied to lung regeneration, opening up new avenues of research that may ultimately be harnessed for treatments of lung disease.
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Chen JH, Qin L, Shi YY, Feng JT, Zheng YL, Wan YF, Xu CQ, Yang XM, Hu CP. IL-17 protein levels in both induced sputum and plasma are increased in stable but not acute asthma individuals with obesity. Respir Med 2016; 121:48-58. [PMID: 27888992 DOI: 10.1016/j.rmed.2016.10.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 10/25/2016] [Accepted: 10/26/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND Obesity worsens asthma control partly through enhanced airway neutrophilia, altered lung mechanics and comorbidities, including obstructive sleep apnea syndrome, gastroesophageal reflux disease and depression. Although controversial, obesity may also cause poorer outcomes in acute asthma. IL-17 is associated with neutrophilic inflammation, steroid resistance and severe asthma, but its importance in the association between asthma and obesity is unknown. OBJECTIVE To investigate the role of IL-17 in obese asthma in both acute and stable settings. METHODS Both stable (n = 177) and acute (n = 78) asthmatics were recruited and categorized into lean (n = 77 and 39 respectively), overweight (n = 41 and 17 respectively) and obese (n = 59 and 22 respectively) groups and compared for clinical characteristics, including sputum and plasma IL-17 protein concentrations, sputum cellularity, spirometry and comorbidities. Correlations of IL-17 expression with other measures were explored. RESULTS In stable subjects, airway neutrophilia and IL-17 concentrations were most prominent in the obese, and correlated positively with each other. Significant increase in plasma IL-17 levels was also noted and associated with elevated depressive symptoms in obesity. In acute asthma, IL-17 expression, like most other clinical measures, was similar among lean, overweight and obese groups, but was higher in acute versus stable asthma subjects, with sputum IL-17 correlating positively with sputum neutrophils and negatively with FEV1 and plasma IL-17 showing a positive connection to airway eosinophilia during exacerbation. CONCLUSIONS IL-17 contributes to worse disease control in obese asthma through enhancing airway neutrophilia and depression, and may implicate in asthma exacerbations. Effects of adiposity on acute asthma remain uncertain.
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Affiliation(s)
- Jian-Hui Chen
- Department of Respiratory Medicine, Xiangya Hospital of Central South University (Key Site of National Clinical Research Center for Respiratory Disease), Changsha 410008, Hunan Province, China; Department of Respiratory Medicine, Huai'an Second People's Hospital, Huai'an 223002, Jiangsu Province, China.
| | - Ling Qin
- Department of Respiratory Medicine, Xiangya Hospital of Central South University (Key Site of National Clinical Research Center for Respiratory Disease), Changsha 410008, Hunan Province, China.
| | - Ying-Ying Shi
- Key Laboratory for Medicinal Exploitation of Huai'an Regional Resource, College of Chemical Engineering, Huaiyin Institute of Technology, Huai'an 223003, Jiangsu Province, China.
| | - Jun-Tao Feng
- Department of Respiratory Medicine, Xiangya Hospital of Central South University (Key Site of National Clinical Research Center for Respiratory Disease), Changsha 410008, Hunan Province, China.
| | - Yu-Long Zheng
- Department of Respiratory Medicine, Huai'an Second People's Hospital, Huai'an 223002, Jiangsu Province, China.
| | - Yu-Feng Wan
- Department of Respiratory Medicine, Huai'an Second People's Hospital, Huai'an 223002, Jiangsu Province, China.
| | - Chuan-Qin Xu
- Department of Respiratory Medicine, Huai'an Second People's Hospital, Huai'an 223002, Jiangsu Province, China.
| | - Xiao-Mei Yang
- Department of Respiratory Medicine, Huai'an Second People's Hospital, Huai'an 223002, Jiangsu Province, China.
| | - Cheng-Ping Hu
- Department of Respiratory Medicine, Xiangya Hospital of Central South University (Key Site of National Clinical Research Center for Respiratory Disease), Changsha 410008, Hunan Province, China.
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Mo LH, Yang LT, Zeng L, Xu LZ, Zhang HP, Li LJ, Liu JQ, Xiao XJ, Zheng PY, Liu ZG, Yang PC. Dust mite allergen, glutathione S-transferase, induces T cell immunoglobulin mucin domain-4 in dendritic cells to facilitate initiation of airway allergy. Clin Exp Allergy 2016; 47:264-270. [PMID: 27532130 DOI: 10.1111/cea.12800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 07/03/2016] [Accepted: 07/17/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND Allergens from dust mites play a critical role in the pathogenesis of airway allergy. The mechanism by which dust mite allergens induce allergic diseases is not fully understood yet. OBJECTIVE This study tests a hypothesis that the eighth subtypes of Dermatophagoides farina allergen (Derf8) play an important role in the induction of airway allergy. METHODS The protein of Derf8 was synthesized via molecular cloning approach. Dendritic cells (DC) were stimulated with Derf8 in the culture, and then, the expression of T cell immunoglobulin mucin domain 4 (TIM4) in dendritic cells (DC) was analysed. The role of Derf8 in the induction of airway allergy was evaluated with a mouse model. RESULTS Exposure to Derf8 markedly induced the TIM4 expression in DCs by modulating the chromatin at the TIM4 promoter locus. Derf8 played a critical role in the expansion of the T helper 2 response in the mouse airway via inducing DCs to produce TIM4. Administration with Derf8-depleted dust mite extracts (DME) inhibited the allergic inflammation and induced regulatory T cells in mice with airway allergy. CONCLUSION Derf8 plays an important role in the initiation of dust mite allergy. Vaccination with Derf8-deficient DME is more efficient to inhibit the dust mite allergic inflammation than using wild DME.
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Affiliation(s)
- L-H Mo
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Longgang ENT Hospital, Shenzhen, China
| | - L-T Yang
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Longgang ENT Hospital, Shenzhen, China.,Brain Body Institute, McMaster University, Hamilton, ON, Canada
| | - L Zeng
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - L-Z Xu
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - H-P Zhang
- Brain Body Institute, McMaster University, Hamilton, ON, Canada
| | - L-J Li
- Brain Body Institute, McMaster University, Hamilton, ON, Canada
| | - J-Q Liu
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Longgang ENT Hospital, Shenzhen, China.,Brain Body Institute, McMaster University, Hamilton, ON, Canada
| | - X-J Xiao
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - P-Y Zheng
- Department of Gastroenterology, The Fifth Hospital, Zhengzhou University, Zhengzhou, China
| | - Z-G Liu
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - P-C Yang
- The Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
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Hales BJ, Hizawa N, Jenmalm M, Sverremark-Ekström E, Wardlaw AJ. Developments in the field of allergy in 2014 through the eyes of Clinical and Experimental Allergy. Clin Exp Allergy 2016; 45:1723-45. [PMID: 26492197 DOI: 10.1111/cea.12663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The pathogenesis of asthma continues to be a major topic of interest to our authors with reviews and original papers on the role of viruses, mechanisms of inflammation, biomarkers, and phenotypes of asthma being major topics. A number of papers described new treatments for asthma focusing on blocking the Th2 response reflecting the fact that two decades of work in this area is finally bearing fruit. The pathogenesis of chronic rhinosinusitis is a growing area of interest, but there has been less on the genetics of airways disease than in previous years possibly reflecting the degree of rigour (and therefore a smaller body of work), with which these sorts of studies are now being undertaken. There continues to be a wide range of papers dealing with mechanisms of allergic disease ranging from clinical-based studies to basic research and the use of in vivo animal models especially mice. As before, mechanisms and new approaches to immunotherapy are common themes. Several were published in the allergens section investigating modification of allergens to increase their effectiveness and reduce the risk of adverse events. Risk factors for allergic disease was a common theme in the epidemiology section and food allergy a common theme in clinical allergy with papers on the development of protocols to induce tolerance and attempts to find biomarkers to distinguish sensitization from allergic disease. This was another exciting year for the editors, and we hope the readers of the journal.
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Affiliation(s)
- B J Hales
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - N Hizawa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - M Jenmalm
- Unit of Autoimmunity and Immune Regulation, Division of Clinical Immunology, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - E Sverremark-Ekström
- M.C., Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - A J Wardlaw
- Department of Infection Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester, UK.,Department of Respiratory Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK
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Histone deacetylase 3 (HDAC 3) as emerging drug target in NF-κB-mediated inflammation. Curr Opin Chem Biol 2016; 33:160-8. [PMID: 27371876 DOI: 10.1016/j.cbpa.2016.06.019] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 06/15/2016] [Accepted: 06/16/2016] [Indexed: 12/17/2022]
Abstract
Activation of inflammatory gene expression is regulated, among other factors, by post-translational modifications of histone proteins. The most investigated type of histone modifications is lysine acetylations. Histone deacetylases (HDACs) remove acetylations from lysines, thereby influencing (inflammatory) gene expression. Intriguingly, apart from histones, HDACs also target non-histone proteins. The nuclear factor κB (NF-κB) pathway is an important regulator in the expression of numerous inflammatory genes, and acetylation plays a crucial role in regulating its responses. Several studies have shed more light on the role of HDAC 1-3 in inflammation with a particular pro-inflammatory role for HDAC 3. Nevertheless, the HDAC-NF-κB interactions in inflammatory signalling have not been fully understood. An important challenge in targeting the regulatory role of HDACs in the NF-κB pathway is the development of highly potent small molecules that selectively target HDAC iso-enzymes. This review focuses on the role of HDAC 3 in (NF-κB-mediated) inflammation and NF-κB lysine acetylation. In addition, we address the application of frequently used small molecule HDAC inhibitors as an approach to attenuate inflammatory responses, and their potential as novel therapeutics. Finally, recent progress and future directions in medicinal chemistry efforts aimed at HDAC 3-selective inhibitors are discussed.
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Wapenaar H, Dekker FJ. Histone acetyltransferases: challenges in targeting bi-substrate enzymes. Clin Epigenetics 2016; 8:59. [PMID: 27231488 PMCID: PMC4881052 DOI: 10.1186/s13148-016-0225-2] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 05/04/2016] [Indexed: 01/02/2023] Open
Abstract
Histone acetyltransferases (HATs) are epigenetic enzymes that install acetyl groups onto lysine residues of cellular proteins such as histones, transcription factors, nuclear receptors, and enzymes. HATs have been shown to play a role in diseases ranging from cancer and inflammatory diseases to neurological disorders, both through acetylations of histone proteins and non-histone proteins. Several HAT inhibitors, like bi-substrate inhibitors, natural product derivatives, small molecules, and protein–protein interaction inhibitors, have been developed. Despite their potential, a large gap remains between the biological activity of inhibitors in in vitro studies and their potential use as therapeutic agents. To bridge this gap, new potent HAT inhibitors with improved properties need to be developed. However, several challenges have been encountered in the investigation of HATs and HAT inhibitors that hinder the development of new HAT inhibitors. HATs have been shown to function in complexes consisting of many proteins. These complexes play a role in the activity and target specificity of HATs, which limits the translation of in vitro to in vivo experiments. The current HAT inhibitors suffer from undesired properties like anti-oxidant activity, reactivity, instability, low potency, or lack of selectivity between HAT subtypes and other enzymes. A characteristic feature of HATs is that they are bi-substrate enzymes that catalyze reactions between two substrates: the cofactor acetyl coenzyme A (Ac-CoA) and a lysine-containing substrate. This has important—but frequently overlooked—consequences for the determination of the inhibitory potency of small molecule HAT inhibitors and the reproducibility of enzyme inhibition experiments. We envision that a careful characterization of molecular aspects of HATs and HAT inhibitors, such as the HAT catalytic mechanism and the enzyme kinetics of small molecule HAT inhibitors, will greatly improve the development of potent and selective HAT inhibitors and provide validated starting points for further development towards therapeutic agents.
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Affiliation(s)
- Hannah Wapenaar
- Department of Pharmaceutical Gene Modulation, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Frank J Dekker
- Department of Pharmaceutical Gene Modulation, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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46
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Liao W, Tan WSD, Wong WSF. Andrographolide Restores Steroid Sensitivity To Block Lipopolysaccharide/IFN-γ-Induced IL-27 and Airway Hyperresponsiveness in Mice. THE JOURNAL OF IMMUNOLOGY 2016; 196:4706-12. [PMID: 27183596 DOI: 10.4049/jimmunol.1502114] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 04/04/2016] [Indexed: 12/28/2022]
Abstract
LPS and IFN-γ alone or in combination have been implicated in the development of steroid resistance. Combined LPS/IFN-γ strongly upregulates IL-27 production, which has been linked to steroid-resistant airway hyperresponsiveness (AHR). Andrographolide, a bioactive molecule isolated from the plant Andrographis paniculata, has demonstrated anti-inflammatory and antioxidant properties. The present study investigated whether andrographolide could restore steroid sensitivity to block LPS/IFN-γ-induced IL-27 production and AHR via its antioxidative property. The mouse macrophage cell line Raw 264.7, mouse primary lung monocytes/macrophages, and BALB/c mice were treated with LPS/IFN-γ, in the presence and absence of dexamethasone and/or andrographolide. Levels of IL-27 in vitro and in vivo were examined and mouse AHR was assessed. Dexamethasone alone failed to inhibit LPS/IFN-γ-induced IL-27 production and AHR in mice. Andrographolide significantly restored the suppressive effect of dexamethasone on LPS/IFN-γ-induced IL-27 mRNA and protein levels in the macrophage cell line and primary lung monocytes/macrophages, mouse bronchoalveolar lavage fluid and lung tissues, and AHR in mice. LPS/IFN-γ markedly reduced the nuclear level of histone deacetylase (HDAC)2, an essential epigenetic enzyme that mediates steroid anti-inflammatory action. LPS/IFN-γ also decreased total HDAC activity but increased the total histone acetyltransferase/HDAC activity ratio in mouse lungs. Andrographolide significantly restored nuclear HDAC2 protein levels and total HDAC activity, and it diminished the total histone acetyltransferase/HDAC activity ratio in mouse lungs exposed to LPS/IFN-γ, possibly via suppression of PI3K/Akt/HDAC2 phosphorylation, and upregulation of the antioxidant transcription factor NF erythroid-2-related factor 2 level and DNA binding activity. Our data suggest that andrographolide may have therapeutic value in resensitizing steroid action in respiratory disorders such as asthma.
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Affiliation(s)
- Wupeng Liao
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, Singapore 117600; and
| | - W S Daniel Tan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, Singapore 117600; and
| | - W S Fred Wong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, Singapore 117600; and Immunology Program, Life Science Institute, National University of Singapore, Singapore 117456
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Zuccaro L, Cox A, Pray C, Radford K, Novakowski K, Dorrington M, Surette MG, Bowdish D, Nair P. Histone deacetylase activity and recurrent bacterial bronchitis in severe eosinophilic asthma. Allergy 2016; 71:571-5. [PMID: 26715426 DOI: 10.1111/all.12831] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/25/2015] [Indexed: 12/19/2022]
Abstract
An increase in P13 Kinase activity and an associated reduction in histone deacetylase activity may contribute to both relative steroid insensitivity in patients with severe eosinophilic asthma and impaired macrophage scavenger function and susceptibility to recurrent infective bronchitis that may, in turn, contribute to further steroid insensitivity.
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Affiliation(s)
- L. Zuccaro
- Division of Respirology; Department of Medicine; McMaster University; Hamilton ON Canada
| | - A. Cox
- Division of Respirology; Department of Medicine; McMaster University; Hamilton ON Canada
| | - C. Pray
- Division of Respirology; Department of Medicine; McMaster University; Hamilton ON Canada
| | - K. Radford
- Division of Respirology; Department of Medicine; McMaster University; Hamilton ON Canada
| | - K. Novakowski
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton ON Canada
| | - M. Dorrington
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton ON Canada
| | - M. G. Surette
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton ON Canada
- Division of Gastroenterology; Department of Medicine; McMaster University; Hamilton ON Canada
| | - D. Bowdish
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton ON Canada
| | - P. Nair
- Division of Respirology; Department of Medicine; McMaster University; Hamilton ON Canada
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48
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Zhang HP, Wang L, Fu JJ, Fan T, Wang ZL, Wang G. Association between histone hyperacetylation status in memory T lymphocytes and allergen-induced eosinophilic airway inflammation. Respirology 2016; 21:850-7. [PMID: 26991676 DOI: 10.1111/resp.12774] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 09/06/2015] [Accepted: 11/27/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVE T lymphocytes, which are characterized by longevity and immune memory, play an important role in airway inflammation in asthma. Here, we assessed the association between immune memory and histone deacetylation and/or acetylation status. METHODS CD4 + CD45RB(low) cells (memory T (Tm)) obtained from the spleens of asthma mice models were co-cultured with glucocorticoids (GCs), trichostatin A (TSA) or anacardic acid (AA) and adoptively transferred to naïve mice. Interleukin (IL)-4, 5 and 13 and IFN-γ concentrations were measured in culture supernatants and bronchoalveolar lavage fluid (BALF). Histone deacetylase (HDAC) and histone acetyltransferase (HAT) activities and the expression of T-bet, GATA-3, HDACs 1-11 and alveolar eosinophilic inflammation index (AEII) were determined in lung tissues. RESULTS Culture supernatants and the BALF showed similar cytokine profiles. AA and GCs significantly inhibited HAT activity (P = 0.002 and P = 0.018), whereas TSA inhibited and GCs promoted HDAC activity (P = 0.004 and P = 0.025). HDACs 7, 9 and 10 were upregulated by AA and GCs (all P < 0.032), while HDAC11 was upregulated by GCs (P = 0.028). GC-induced inhibition of Tm histone acetylation alleviated AEII by downregulating IL-4, 5 and 13, similar to the effect of AA. CONCLUSION Histone hyperacetylation status induced by low expression of HDACs 7, 9 and 10 in allergen-specific Tm cells contributes to eosinophilic airway inflammation. The mechanism by which GCs improve airway inflammation involves the upregulation of HDACs 7, 9, 10 and 11 and especially HDAC-10. The role of individual HDACs and AA as novel therapeutic agents for allergic asthma needs to be explored in the future.
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Affiliation(s)
- Hong Ping Zhang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, State Key Laboratory of Biotherapy of China, West China Hospital, Sichuan University, Chengdu, China.,Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Lei Wang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Juan Juan Fu
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Tao Fan
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Zeng Li Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Gang Wang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, State Key Laboratory of Biotherapy of China, West China Hospital, Sichuan University, Chengdu, China.,Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
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49
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Lung Regeneration: Endogenous and Exogenous Stem Cell Mediated Therapeutic Approaches. Int J Mol Sci 2016; 17:ijms17010128. [PMID: 26797607 PMCID: PMC4730369 DOI: 10.3390/ijms17010128] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/07/2016] [Accepted: 01/11/2016] [Indexed: 12/25/2022] Open
Abstract
The tissue turnover of unperturbed adult lung is remarkably slow. However, after injury or insult, a specialised group of facultative lung progenitors become activated to replenish damaged tissue through a reparative process called regeneration. Disruption in this process results in healing by fibrosis causing aberrant lung remodelling and organ dysfunction. Post-insult failure of regeneration leads to various incurable lung diseases including chronic obstructive pulmonary disease (COPD) and idiopathic pulmonary fibrosis. Therefore, identification of true endogenous lung progenitors/stem cells, and their regenerative pathway are crucial for next-generation therapeutic development. Recent studies provide exciting and novel insights into postnatal lung development and post-injury lung regeneration by native lung progenitors. Furthermore, exogenous application of bone marrow stem cells, embryonic stem cells and inducible pluripotent stem cells (iPSC) show evidences of their regenerative capacity in the repair of injured and diseased lungs. With the advent of modern tissue engineering techniques, whole lung regeneration in the lab using de-cellularised tissue scaffold and stem cells is now becoming reality. In this review, we will highlight the advancement of our understanding in lung regeneration and development of stem cell mediated therapeutic strategies in combating incurable lung diseases.
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50
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Hou J, She W, Du X, Dai Y, Xie L, Zhou Q. Histone Deacetylase 2 in Sudden Sensorineural Hearing Loss Patients in Response to Intratympanic Methylprednisolone Perfusion. Otolaryngol Head Neck Surg 2015; 154:164-70. [PMID: 26408561 DOI: 10.1177/0194599815606911] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 08/28/2015] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To evaluate the expression of histone deacetylase 2 (HDAC2) in peripheral blood mononuclear cells (PBMCs) from patients with sudden sensorineural hearing loss (SSNHL) who were refractory to systemic glucocorticoid treatment and to identify the relationship between the level of HDAC2 and glucocorticoid insensitivity. STUDY DESIGN Prospective clinical study. SETTING This study was conducted in Nanjing Drum Tower Hospital, Nanjing University Medical School. SUBJECTS AND METHODS PBMCs were collected from 42 refractory SSNHL patients. After a 10-day intratympanic methylprednisolone perfusion (IMP) and systemic Ginkgo biloba extract treatment, the SSNHL patients were divided into 2 groups according to their hearing recovery after IMP (IMP sensitive and insensitive). Real-time polymerase chain reaction and HDAC2 protein assays were used to detect the relative expression levels of HDAC2 in PBMCs. The HDAC2 mRNA expression and protein levels in PBMCs collected from 17 volunteers were used as normal HDAC2 reference levels. RESULTS Compared with normal reference levels, HDAC2 protein levels were significantly reduced, while the HDAC2 mRNA expression was much higher in all refractory SSNHL patients before IMP. HDAC2 mRNA expression and HDAC2 protein levels were significantly elevated in the IMP-sensitive group, while no change was observed in the IMP-insensitive group after IMP plus systemic antioxidant treatment. CONCLUSIONS Reduced HDAC2 protein levels may be 1 of the mechanistic underpinnings of corticosteroid insensitivity in refractory SSNHL patients. IMP can increase HDAC2 protein levels and the expression of HDAC2 mRNA in IMP-sensitive patients. HDAC2 protein levels might be regulated through posttranslational modifications.
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Affiliation(s)
- Jie Hou
- Department of Otolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Wandong She
- Department of Otolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xiaoping Du
- Hough Ear Institute, Oklahoma City, Oklahoma, USA
| | - Yanhong Dai
- Department of Otolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Lisheng Xie
- Department of Otolaryngology, Nanjing Children's Hospital, Nanjing Medical University, Nanjing, China
| | - Qiongqiong Zhou
- Department of Otolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
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