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Fu D, Zhao H, Huang Y, Li J, Feng H, Li A, Liu Y, He L. Metformin regulates the effects of IR and IGF-1R methylation on mast cell activation and airway reactivity in diabetic rats with asthma through miR-152-3p/DNMT1 axis. Cell Biol Toxicol 2023; 39:1851-1872. [PMID: 36547818 DOI: 10.1007/s10565-022-09787-1] [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: 07/28/2022] [Accepted: 12/06/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND/AIM Metformin is a drug for treating type 2 diabetes mellitus (T2DM). Recently, metformin has been shown to reduce the risks of asthma-associated outcomes and asthma deterioration, thereby holding promise as a superior medicine for diabetic patients with asthma. However, the mechanism by which metformin reduces diabetic asthma is yet to be clarified. This study aimed at ascertaining the downstream molecules underlying the effect of metformin on the activation of mast cells (MCs) and airway reactivity in a concomitant diabetic and asthmatic rat model. METHODS A T2DM model was induced utilizing a high-fat diet and streptozotocin. Then, 10% ovalbumin was utilized to stimulate asthma-like pathology in the T2DM rats. RBL-2H3 cells were induced by anti-dinitrophenyl-specific immunoglobulin E for constructing an in vitro model. Luciferase assay and RNA immunoprecipitation (IP) assay were conducted to identify the interaction between microRNA-152-3p (miR-152-3p) and DNA methyltransferase 1 (DNMT1), while chromatin IP to identify the binding of DNMT1 to insulin receptor (IR) and insulin-like growth factor 1 receptor (IGF-1R) promoters. The effects of metformin on both pathological changes in vivo and biological behaviors of cells were evaluated. Using gain- and loss-of-function approaches, we assessed the role of the two interactions in the metformin-induced effect. RESULTS It was suggested that metformin could impede the MC activation and airway resistance in the concomitant diabetic and asthmatic rats. Additionally, metformin downregulated IR and IGF-1R through DNMT1-dependent methylation to repress MC activation and airway resistance. DNMT1 was testified to be a target gene of miR-152-3p. Furthermore, miR-152-3p-induced silencing of DNMT1 was blocked by metformin, hence restraining MC activation and airway resistance. CONCLUSION The findings cumulatively demonstrate that metformin downregulates IR/IGF-1R to block MC activation and airway resistance via impairing the binding affinity between miR-152-3p and DNMT1.
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Affiliation(s)
- Dan Fu
- Department of Endocrinology, Xiangya Hospital of Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Hailu Zhao
- Diabetic Systems Center, Guangxi Key Laboratory of Excellence, Guilin Medical University, Guilin, Guangxi, 541000, People's Republic of China
| | - Yan Huang
- Department of Anesthesiology, The Fifth Affiliated Hospital of Southern Medical University, No.566, Congcheng Ave, Guangzhou, Guangdong, 510900, People's Republic of China
| | - Jingjuan Li
- Department of Anesthesiology, The Fifth Affiliated Hospital of Southern Medical University, No.566, Congcheng Ave, Guangzhou, Guangdong, 510900, People's Republic of China
| | - Huafeng Feng
- Department of Anesthesiology, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, 541001, People's Republic of China
| | - Aiguo Li
- Department of Anesthesiology, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, 541001, People's Republic of China
| | - Yefen Liu
- Department of Anesthesiology, The Fifth Affiliated Hospital of Southern Medical University, No.566, Congcheng Ave, Guangzhou, Guangdong, 510900, People's Republic of China
| | - Liang He
- Department of Anesthesiology, The Fifth Affiliated Hospital of Southern Medical University, No.566, Congcheng Ave, Guangzhou, Guangdong, 510900, People's Republic of China.
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Kwon Y, Kim M, Kim Y, Jeong MS, Jung HS, Jeoung D. EGR3-HDAC6-IL-27 Axis Mediates Allergic Inflammation and Is Necessary for Tumorigenic Potential of Cancer Cells Enhanced by Allergic Inflammation-Promoted Cellular Interactions. Front Immunol 2021; 12:680441. [PMID: 34234781 PMCID: PMC8257050 DOI: 10.3389/fimmu.2021.680441] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 06/07/2021] [Indexed: 11/18/2022] Open
Abstract
The objective of this study was to investigate mechanisms of allergic inflammation both in vitro and in vivo in details. For this, RNA sequencing was performed. Early growth response 3 gene (Egr3) was one of the most highly upregulated genes in rat basophilic leukemia (RBL2H3) cells stimulated by antigen. The role of Egr3 in allergic inflammation has not been studied extensively. Egr3 was necessary for passive cutaneous anaphylaxis (PCA) and passive systemic anaphylaxis (PSA). Egr3 promoter sequences contained potential binding site for NF-κB p65. NF-κB p65 directly regulated Egr3 expression and mediated allergic inflammation in vitro. Histone deacetylases (HDACs) is known to be involved in allergic airway inflammation. HDAC6 promoter sequences contained potential binding site for EGR3. EGR3 showed binding to promoter sequences of HDAC6. EGR3 was necessary for increased expression of histone deacetylase 6 (HDAC6) in antigen-stimulated RBL2H3 cells. HDAC6 mediated allergic inflammation in vitro and PSA. TargetScan analysis predicted that miR-182-5p was a negative regulator of EGR3. Luciferase activity assay confirmed that miR-182-5p was a direct regulator of EGR3. MiR-182-5p mimic inhibited allergic inflammation both in vitro and in vivo. Cytokine array showed that HDAC6 was necessary for increased interleukin-27 (IL-27) expression in BALB/C mouse model of PSA. Antigen stimulation did not affect expression of EBI3, another subunit of IL-27 in RBL2H3 cells or BALB/C mouse model of PCA or PSA. IL-27 receptor alpha was shown to be able to bind to HDAC6. IL-27 p28 mediated allergic inflammation in vitro, PCA, and PSA. Mouse recombinant IL-27 protein promoted features of allergic inflammation in an antigen-independent manner. HDAC6 was necessary for tumorigenic and metastatic potential enhanced by PSA. PSA enhanced the metastatic potential of mouse melanoma B16F1 cells in an IL-27-dependent manner. Experiments employing culture medium and mouse recombinant IL-27 protein showed that IL-27 mediated and promoted cellular interactions involving B16F1 cells, lung macrophages, and mast cells during allergic inflammation. IL-27 was present in exosomes of antigen-stimulated RBL2H3 cells. Exosomes from antigen-stimulated RBL2H3 cells enhanced invasion of B16F1 melanoma cells in an IL-27-dependemt manner. These results present evidence that EGR3-HDAC6-IL-27 axis can regulate allergic inflammation by mediating cellular interactions.
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Affiliation(s)
- Yoojung Kwon
- Department of Biochemistry, Kangwon National University, Chuncheon, South Korea
| | - Misun Kim
- Department of Biochemistry, Kangwon National University, Chuncheon, South Korea
| | - Youngmi Kim
- Institute of New Frontier Research, College of Medicine, Hallym University, Chuncheon, South Korea
| | - Myeong Seon Jeong
- Department of Biochemistry, Kangwon National University, Chuncheon, South Korea.,Chuncheon Center, Korea Basic Science Institute, Chuncheon, South Korea
| | - Hyun Suk Jung
- Department of Biochemistry, Kangwon National University, Chuncheon, South Korea
| | - Dooil Jeoung
- Department of Biochemistry, Kangwon National University, Chuncheon, South Korea
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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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Li YL, Xing XQ, Xiao Y, Liu YH, Zhou YS, Zhuang M, Li CQ. Correlation between DNA methylation and Thymic Stromal Lymphopoietin expression in asthmatic airway epithelial cells. Genes Genomics 2020; 42:1399-1406. [PMID: 33040302 DOI: 10.1007/s13258-020-01000-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 09/15/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND The overexpression of TSLP and DNA methylation in asthma were both risk factors the relationship was not clear. OBJECTIVE This study aimed to investigate the relationship between methylation status of TSLP promoter and mRNA/protein expression in asthmatic airway epithelial cells. METHODS Human bronchial epithelial cells were cultured in vitro and divided into: Control group, treated with PBS, model group, sensitized with LPS (10 μg/mL) for 12 h (37 °C, 5% CO2). Other groups were cultured with the pCMV3 plasmid (M + NC/pCMV), pGPH1 plasmid (M + NC/pGPH), DNMT1/pCMV3 plasmid (M + DNMT1/pCMV), and DNMT1/pGPH1 plasmid (M + DNMT1/pGPH) for 48 h. The expression of DNA methyltransferase 1 and TSLP were measured using real-time PCR and western blotting. RESULTS Compared with the control group, TSLP mRNA (1.00 ± 0.00 vs. 2.82 ± 0.81 vs. 1, P < 0.001) and protein (1.07 ± 0.04 vs. 1.46 ± 0.11, P < 0.01) were significantly greater, and the methylation of promoter was lower (92.75 ± 1.26 vs. 58.57 ± 3.34, P < 0.05) in the model group. Compared with the model group, TSLP mRNA (2.82 ± 0.81 vs. 1.17 ± 0.10, P < 0.001) decreased, but TSLP promoter methylation increased (58.57 ± 3.34 vs. 92.58 ± 7.30, P < 0.05) in M + DNMT1/pCMV. TSLP mRNA and protein were higher (2.82 ± 0.81 vs. 5.32 ± 0.21, P < 0.001; 1.46 ± 0.11 vs. 1.94 ± 0.11, respectively, P < 0.01), TSLP promoter methylation was lower (58.57 ± 3.34 vs. 33.57 ± 4.29, P < 0.05) in M + DNMT1/pGPH. CONCLUSIONS Overexpression of TSLP in asthmatic airway epithelial cells may be regulated by DNA demethylation.
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Affiliation(s)
- Yan-Li Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Qingxiu District, Nanning, 530021, Guangxi, People's Republic of China.,First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Xi-Qian Xing
- First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Yi Xiao
- First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Yan-Hong Liu
- First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Yu-Shan Zhou
- First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Min Zhuang
- First Department of Pulmonary and Critical Care Medicine, Yan'An Hospital Affiliated to Kunming Medical University, Kunming, 650051, Yunnan, People's Republic of China
| | - Chao-Qian Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Qingxiu District, Nanning, 530021, Guangxi, People's Republic of China.
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Plasma Homocysteine and Polymorphisms of Genes Involved in Folate Metabolism Correlate with DNMT1 Gene Methylation Levels. Metabolites 2019; 9:metabo9120298. [PMID: 31817852 PMCID: PMC6950100 DOI: 10.3390/metabo9120298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/01/2019] [Accepted: 12/05/2019] [Indexed: 12/22/2022] Open
Abstract
DNA methyltransferase 1 (DNMT1) is responsible for the maintenance of DNA methylation patterns during cell division. Several human diseases are characterized by impaired DNMT1 gene methylation, but less is known about the factors that regulate DNMT1 promoter methylation levels. Dietary folates and related B-vitamins are essential micronutrients for DNA methylation processes, and we performed the present study to investigate the contribution of circulating folate, vitamin B12, homocysteine, and common polymorphisms in folate pathway genes to the DNMT1 gene methylation levels. We investigated DNMT1 gene methylation levels in peripheral blood DNA samples from 215 healthy individuals. All the DNA samples were genotyped for MTHFR 677C > T (rs1801133) and 1298A > C (rs1801131), MTRR 66A > G (rs1801394), MTR 2756A > G (rs1805087), SLC19A1 (RFC1) 80G > A (rs1051266), TYMS 28-bp tandem repeats (rs34743033) and 1494 6-bp insertion/deletion (indel) (rs34489327), DNMT3A -448A > G (rs1550117), and DNMT3B -149C > T (rs2424913) polymorphisms. Circulating homocysteine, folate, and vitamin B12 levels were available from 158 of the recruited individuals. We observed an inverse correlation between plasma homocysteine and DNMT1 methylation levels. Furthermore, both MTR rs1805087 and TYMS rs34743033 polymorphisms showed a statistically significant effect on DNMT1 methylation levels. The present study revealed several correlations between the folate metabolic pathway and DNMT1 promoter methylation that could be of relevance for those disorders characterized by altered DNA methylation.
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Mei M, Song H, Chen L, Hu B, Bai R, Xu D, Liu Y, Zhao Y, Chen C. Early-life exposure to three size-fractionated ultrafine and fine atmospheric particulates in Beijing exacerbates asthma development in mature mice. Part Fibre Toxicol 2018. [PMID: 29540228 PMCID: PMC5851307 DOI: 10.1186/s12989-018-0249-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Epidemiological studies have suggested that elevated levels of air pollution contribute to an increased incidence or severity of asthma. Although late-onset adult asthma seems to be more attributable to environmental risk factors, limited data is available on the impact of early-life exposure to size-fractionated ambient particulate matter (PM) on asthma in adults. We aimed to determine the effect on the development and exacerbation of asthma in the adult after the mice were exposed as juveniles to three size-fractionated ambient particulates collected from Beijing. METHODS The three size-fractionated ambient particulates were collected from urban Beijing in winter, heavily affected by traffic and coal-fired emissions. The typical morphological and major chemical components of the PM were characterized first. Oxidative stress and expression of DNA methyltransferases (DNMTs) were then examined in vitro and in the lungs of mouse pups 48 h after exposure to PM by oropharyngeal aspiration. When the exposed and control juvenile mice matured to adulthood, an antigen-induced asthma model was established and relevant bio-indices were assessed. RESULTS PM with different granularities can induce oxidative stress; in particular, F1, with the smallest size (< 0.49 μm), decreased the mRNA expression of DNMTs in vitro and in vivo the most significantly. In an asthma model of adult mice, previous exposure as juveniles to size-fractionated PM caused increased peribronchiolar inflammation, increased airway mucus secretion, and increased production of Th2 cytokines and chemokines. In general, F1 and F2 (aerodynamic diameter < 0.95 μm) particulates affected murine adult asthma development more seriously than F3 (0.95-1.5 μm). Moreover, F1 led to airway inflammation in the form of both increased neutrophils and eosinophils in BALF. The activation of the TGF-β1/Smad2 and Smad3/Stat3 signaling pathways leading to airway fibrosis was more profoundly induced by F1. CONCLUSION This study demonstrated that exposure to ambient PM in juvenile mice enhanced adult asthma development, as shown by increased Th2 responses, which might be associated with the persistent effects resulting from the oxidative stress and decreased gene expression of DNMTs induced by PM exposure. The observed differences between the effects of three size-fractionated particulates were attributed to particle sizes and chemical constituents, including heavy metals and also PAHs, since the amounts of PAH associated with more severe toxicity were enriched equivalently in the F1 and F2 fractions. Relative to the often mentioned PM2.5, PM with an aerodynamic diameter smaller than 0.95 μm had a more aggravating effect on asthma development.
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Affiliation(s)
- Mei Mei
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Haojun Song
- Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Lina Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Bin Hu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Ru Bai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Diandou Xu
- Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ying Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuliang Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience & Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology of China and University of Chinese Academy of Sciences, Beijing, 100190, China.
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Remely M, Ferk F, Sterneder S, Setayesh T, Kepcija T, Roth S, Noorizadeh R, Greunz M, Rebhan I, Wagner KH, Knasmüller S, Haslberger A. Vitamin E Modifies High-Fat Diet-Induced Increase of DNA Strand Breaks, and Changes in Expression and DNA Methylation of Dnmt1 and MLH1 in C57BL/6J Male Mice. Nutrients 2017; 9:nu9060607. [PMID: 28613268 PMCID: PMC5490586 DOI: 10.3390/nu9060607] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/18/2017] [Accepted: 05/30/2017] [Indexed: 02/07/2023] Open
Abstract
Obesity is associated with low-grade inflammation, increased ROS production and DNA damage. Supplementation with antioxidants might ameliorate DNA damage and support epigenetic regulation of DNA repair. C57BL/6J male mice were fed a high-fat (HFD) or a control diet (CD) with and without vitamin E supplementation (4.5 mg/kg body weight (b.w.)) for four months. DNA damage, DNA promoter methylation and gene expression of Dnmt1 and a DNA repair gene (MLH1) were assayed in liver and colon. The HFD resulted in organ specific changes in DNA damage, the epigenetically important Dnmt1 gene, and the DNA repair gene MLH1. Vitamin E reduced DNA damage and showed organ-specific effects on MLH1 and Dnmt1 gene expression and methylation. These results suggest that interventions with antioxidants and epigenetic active food ingredients should be developed as an effective prevention for obesity—and oxidative stress—induced health risks.
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Affiliation(s)
- Marlene Remely
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Franziska Ferk
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria.
| | - Sonja Sterneder
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Tahereh Setayesh
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria.
| | - Tatjana Kepcija
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Sylvia Roth
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Rahil Noorizadeh
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria.
| | - Martina Greunz
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Irene Rebhan
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Karl-Heinz Wagner
- Department of Nutritional Sciences, University Vienna, 1010 Vienna, Austria.
| | - Siegfried Knasmüller
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria.
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Ji H, Biagini Myers JM, Brandt EB, Brokamp C, Ryan PH, Khurana Hershey GK. Air pollution, epigenetics, and asthma. Allergy Asthma Clin Immunol 2016; 12:51. [PMID: 27777592 PMCID: PMC5069789 DOI: 10.1186/s13223-016-0159-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 10/04/2016] [Indexed: 12/13/2022] Open
Abstract
Exposure to traffic-related air pollution (TRAP) has been implicated in asthma development, persistence, and exacerbation. This exposure is highly significant as large segments of the global population resides in zones that are most impacted by TRAP and schools are often located in high TRAP exposure areas. Recent findings shed new light on the epigenetic mechanisms by which exposure to traffic pollution may contribute to the development and persistence of asthma. In order to delineate TRAP induced effects on the epigenome, utilization of newly available innovative methods to assess and quantify traffic pollution will be needed to accurately quantify exposure. This review will summarize the most recent findings in each of these areas. Although there is considerable evidence that TRAP plays a role in asthma, heterogeneity in both the definitions of TRAP exposure and asthma outcomes has led to confusion in the field. Novel information regarding molecular characterization of asthma phenotypes, TRAP exposure assessment methods, and epigenetics are revolutionizing the field. Application of these new findings will accelerate the field and the development of new strategies for interventions to combat TRAP-induced asthma.
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Affiliation(s)
- Hong Ji
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave. MLC 7037, Cincinnati, OH 45229 USA ; Pyrosequencing lab for Genomic and Epigenomic research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229 USA
| | - Jocelyn M Biagini Myers
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave. MLC 7037, Cincinnati, OH 45229 USA
| | - Eric B Brandt
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave. MLC 7037, Cincinnati, OH 45229 USA
| | - Cole Brokamp
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229 USA
| | - Patrick H Ryan
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229 USA
| | - Gurjit K Khurana Hershey
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave. MLC 7037, Cincinnati, OH 45229 USA
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Folate status, regulatory T cells and MTHFR C677T polymorphism study in allergic children. Adv Med Sci 2016; 61:300-305. [PMID: 27149557 DOI: 10.1016/j.advms.2016.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 03/01/2016] [Accepted: 03/30/2016] [Indexed: 12/22/2022]
Abstract
PURPOSE This study aimed to investigate early-life folate serum concentrations in children with food, inhalant or mixed type allergy. The influence of folate levels on the FoxP3 expression in Treg (regulatory T) cells in the studied children, taking into account the MTHFR (5,10-methylenetetrahydrofolate reductase) genotypes was also analyzed. MATERIAL AND METHODS The study was performed in 83 allergic children (study group) and 49 healthy children (control group), aged 2-72 months. Medical history of each child was obtained and laboratory tests (serum folic acid concentrations and MTHFR C677T polymorphism) were carried out. The percentage of Treg cells was evaluated in almost a half of the examined subjects (48.5%). RESULTS Significantly higher serum folate levels in the group of children with food allergy than in those with inhalant allergy was confirmed (P=0.037). In the study group the TT homozygotes were characterized by significantly lower folate concentrations than CC homozygotes (P=0.045). A negative correlation was demonstrated between the FoxP3 expression in CD4+CD25highFoxP3+ peripheral blood lymphocytes and serum folic acid concentrations. The correlation was more pronounced in the group of allergic children and it was statistically significant (r=-0.339, P<0.05). CONCLUSIONS The results of the study indicate a possibility of some effects of folate status on Treg cells, thus suggesting their potential role in the development and course of allergy in children.
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Kidd CDA, Thompson PJ, Barrett L, Baltic S. Histone Modifications and Asthma. The Interface of the Epigenetic and Genetic Landscapes. Am J Respir Cell Mol Biol 2016; 54:3-12. [PMID: 26397168 DOI: 10.1165/rcmb.2015-0050tr] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Complex lung diseases, such as asthma, are influenced by both genetic predisposition and environmental stimuli. The epigenetic landscape of such diseases is attracting increasing interest and research. Epigenetics broadly covers the transient and the inheritable changes to gene expression that are not directly due to changes in nucleotide sequences. Epigenetic mechanisms could have significant impact on asthma-related allergic, immune, and regulatory pathways, as well as on the generation of biomarkers and the heritable transmission of asthma phenotypes. Recent technological advances have allowed mapping of the epigenome and analysis of genome-wide epigenetic contributors to disease. As a result, ground-breaking observations regarding histone post-translational modifications in a number of immunological diseases have emerged. In this review, we look beyond the biological information coded by DNA and review the epigenetic modifications made to histones, with evidence suggesting a role for their modification in asthma.
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Affiliation(s)
- Courtney D A Kidd
- 1 Institute for Respiratory Health, Perth, Western Australia, Australia.,2 Centre for Respiratory Health, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia; and
| | - Philip J Thompson
- 1 Institute for Respiratory Health, Perth, Western Australia, Australia.,2 Centre for Respiratory Health, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia; and.,3 Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Western Australia, Perth, Western Australia, Australia
| | - Lucy Barrett
- 1 Institute for Respiratory Health, Perth, Western Australia, Australia.,2 Centre for Respiratory Health, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia; and
| | - Svetlana Baltic
- 1 Institute for Respiratory Health, Perth, Western Australia, Australia.,2 Centre for Respiratory Health, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia; and
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11
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Boosani CS, Agrawal DK. Methylation and microRNA-mediated epigenetic regulation of SOCS3. Mol Biol Rep 2015; 42:853-72. [PMID: 25682267 DOI: 10.1007/s11033-015-3860-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Epigenetic gene silencing of several genes causes different pathological conditions in humans, and DNA methylation has been identified as one of the key mechanisms that underlie this evolutionarily conserved phenomenon associated with developmental and pathological gene regulation. Recent advances in the miRNA technology with high throughput analysis of gene regulation further increased our understanding on the role of miRNAs regulating multiple gene expression. There is increasing evidence supporting that the miRNAs not only regulate gene expression but they also are involved in the hypermethylation of promoter sequences, which cumulatively contributes to the epigenetic gene silencing. Here, we critically evaluated the recent progress on the transcriptional regulation of an important suppressor protein that inhibits cytokine-mediated signaling, SOCS3, whose expression is directly regulated both by promoter methylation and also by microRNAs, affecting its vital cell regulating functions. SOCS3 was identified as a potent inhibitor of Jak/Stat signaling pathway which is frequently upregulated in several pathologies, including cardiovascular disease, cancer, diabetes, viral infections, and the expression of SOCS3 was inhibited or greatly reduced due to hypermethylation of the CpG islands in its promoter region or suppression of its expression by different microRNAs. Additionally, we discuss key intracellular signaling pathways regulated by SOCS3 involving cellular events, including cell proliferation, cell growth, cell migration and apoptosis. Identification of the pathway intermediates as specific targets would not only aid in the development of novel therapeutic drugs, but, would also assist in developing new treatment strategies that could successfully be employed in combination therapy to target multiple signaling pathways.
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Affiliation(s)
- Chandra S Boosani
- Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, NE, 68178, USA
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12
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Abstract
Asthma is a chronic disease which causes recurrent breathlessness affecting 300 million people worldwide of whom 250,000 die annually. The epigenome is a set of heritable modifications and tags that affect the genome without changing the intrinsic DNA sequence. These marks include DNA methylation, modifications to histone proteins around which DNA is wrapped and expression of noncoding RNA. Alterations in all of these processes have been reported in patients with asthma. In some cases these differences are linked to disease severity and susceptibility and may account for the limited value of genetic studies in asthma. Animal models of asthma suggest that epigenetic modifications and processes are linked to asthma and may be tractable targets for therapeutic intervention.
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Affiliation(s)
- Peter O Brook
- Imperial College London, National Heart & Lung Institute, Dovehouse Street, London, SW3 6LY, UK
| | - Mark M Perry
- Imperial College London, National Heart & Lung Institute, Dovehouse Street, London, SW3 6LY, UK
| | - Ian M Adcock
- Imperial College London, National Heart & Lung Institute, Dovehouse Street, London, SW3 6LY, UK
| | - Andrew L Durham
- Imperial College London, National Heart & Lung Institute, Dovehouse Street, London, SW3 6LY, UK
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13
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Gautier JF, Porcher R, Abi Khalil C, Bellili-Munoz N, Fetita LS, Travert F, Choukem SP, Riveline JP, Hadjadj S, Larger E, Boudou P, Blondeau B, Roussel R, Ferré P, Ravussin E, Rouzet F, Marre M. Kidney Dysfunction in Adult Offspring Exposed In Utero to Type 1 Diabetes Is Associated with Alterations in Genome-Wide DNA Methylation. PLoS One 2015; 10:e0134654. [PMID: 26258530 PMCID: PMC4530883 DOI: 10.1371/journal.pone.0134654] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 07/13/2015] [Indexed: 12/20/2022] Open
Abstract
Background Fetal exposure to hyperglycemia impacts negatively kidney development and function. Objective Our objective was to determine whether fetal exposure to moderate hyperglycemia is associated with epigenetic alterations in DNA methylation in peripheral blood cells and whether those alterations are related to impaired kidney function in adult offspring. Design Twenty nine adult, non-diabetic offspring of mothers with type 1 diabetes (T1D) (case group) were matched with 28 offspring of T1D fathers (control group) for the study of their leukocyte genome-wide DNA methylation profile (27,578 CpG sites, Human Methylation 27 BeadChip, Illumina Infinium). In a subset of 19 cases and 18 controls, we assessed renal vascular development by measuring Glomerular Filtration Rate (GFR) and Effective Renal Plasma Flow (ERPF) at baseline and during vasodilatation produced by amino acid infusion. Results Globally, DNA was under-methylated in cases vs. controls. Among the 87 CpG sites differently methylated, 74 sites were less methylated and 13 sites more methylated in cases vs. controls. None of these CpG sites were located on a gene known to be directly involved in kidney development and/or function. However, the gene encoding DNA methyltransferase 1 (DNMT1)—a key enzyme involved in gene expression during early development–was under-methylated in cases. The average methylation of the 74 under-methylated sites differently correlated with GFR in cases and controls. Conclusion Alterations in methylation profile imprinted by the hyperglycemic milieu of T1D mothers during fetal development may impact kidney function in adult offspring. The involved pathways seem to be a nonspecific imprinting process rather than specific to kidney development or function.
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Affiliation(s)
- Jean-François Gautier
- Department of Diabetes and Endocrinology, Assistance Publique—Hôpitaux de Paris, DHU FIRE, Lariboisière Hospital, University Paris-Diderot Paris-7, Paris, France
- Clinical Investigation Center, INSERM-CIC9504, Saint-Louis University Hospital, Assistance Publique—Hôpitaux de Paris, University Paris-Diderot Paris-7, Paris, France
- INSERM UMRS 1138, Cordeliers Research Center, University Pierre et Marie Curie Paris-6, Paris, France
- * E-mail:
| | - Raphaël Porcher
- Department of Biostatistics and Medical Computing, Saint-Louis University Hospital, Assistance Publique—Hôpitaux de Paris, University Paris-Diderot Paris-7, Paris, France
| | - Charbel Abi Khalil
- Department of Diabetes, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique—Hôpitaux de Paris, DHU FIRE, University Paris-Diderot Paris-7, Paris, France
| | - Naima Bellili-Munoz
- INSERM UMRS 1138, Cordeliers Research Center, University Pierre et Marie Curie Paris-6, Paris, France
| | - Lila Sabrina Fetita
- Department of Diabetes and Endocrinology, Assistance Publique—Hôpitaux de Paris, DHU FIRE, Lariboisière Hospital, University Paris-Diderot Paris-7, Paris, France
| | - Florence Travert
- Department of Diabetes, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique—Hôpitaux de Paris, DHU FIRE, University Paris-Diderot Paris-7, Paris, France
- Clinical Investigation Center, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique–Hôpitaux de Paris, University Paris-Diderot Paris-7, Paris, France
| | - Simeon-Pierre Choukem
- Department of Diabetes and Endocrinology, Assistance Publique—Hôpitaux de Paris, DHU FIRE, Lariboisière Hospital, University Paris-Diderot Paris-7, Paris, France
| | - Jean-Pierre Riveline
- INSERM UMRS 1138, Cordeliers Research Center, University Pierre et Marie Curie Paris-6, Paris, France
- Department of Diabetes and Endocrinology, Centre Hospitalier Sud Francilien, Corbeil-Essonnes, France
| | - Samy Hadjadj
- Department of Endocrinology and Diabetes, Centre Hospitalier Universitaire, Poitiers, France
| | - Etienne Larger
- Department of Diabetes, Hôtel-Dieu Hospital, Assistance Publique–Hôpitaux de Paris, Paris, France
| | - Philippe Boudou
- Unit of Transfer in Molecular Oncology and Hormonology, Saint-Louis University Hospital, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Bertrand Blondeau
- INSERM UMRS 1138, Cordeliers Research Center, University Pierre et Marie Curie Paris-6, Paris, France
| | - Ronan Roussel
- Department of Diabetes, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique—Hôpitaux de Paris, DHU FIRE, University Paris-Diderot Paris-7, Paris, France
- INSERM U695, University Paris-Diderot Paris-7, Paris, France
| | - Pascal Ferré
- INSERM UMRS 1138, Cordeliers Research Center, University Pierre et Marie Curie Paris-6, Paris, France
| | - Eric Ravussin
- Penington Biomedical Research Center, Baton Rouge, LA, United States of America
| | - François Rouzet
- Department of Nuclear Medicine, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique—Hôpitaux de Paris, University Paris-Diderot Paris-7, Paris, France
| | - Michel Marre
- Department of Diabetes, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique—Hôpitaux de Paris, DHU FIRE, University Paris-Diderot Paris-7, Paris, France
- Clinical Investigation Center, Groupe Hospitalier Bichat—Claude Bernard, Assistance Publique–Hôpitaux de Paris, University Paris-Diderot Paris-7, Paris, France
- INSERM U695, University Paris-Diderot Paris-7, Paris, France
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14
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Comer BS, Ba M, Singer CA, Gerthoffer WT. Epigenetic targets for novel therapies of lung diseases. Pharmacol Ther 2014; 147:91-110. [PMID: 25448041 DOI: 10.1016/j.pharmthera.2014.11.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 11/06/2014] [Indexed: 12/13/2022]
Abstract
In spite of substantial advances in defining the immunobiology and function of structural cells in lung diseases there is still insufficient knowledge to develop fundamentally new classes of drugs to treat many lung diseases. For example, there is a compelling need for new therapeutic approaches to address severe persistent asthma that is insensitive to inhaled corticosteroids. Although the prevalence of steroid-resistant asthma is 5-10%, severe asthmatics require a disproportionate level of health care spending and constitute a majority of fatal asthma episodes. None of the established drug therapies including long-acting beta agonists or inhaled corticosteroids reverse established airway remodeling. Obstructive airways remodeling in patients with chronic obstructive pulmonary disease (COPD), restrictive remodeling in idiopathic pulmonary fibrosis (IPF) and occlusive vascular remodeling in pulmonary hypertension are similarly unresponsive to current drug therapy. Therefore, drugs are needed to achieve long-acting suppression and reversal of pathological airway and vascular remodeling. Novel drug classes are emerging from advances in epigenetics. Novel mechanisms are emerging by which cells adapt to environmental cues, which include changes in DNA methylation, histone modifications and regulation of transcription and translation by noncoding RNAs. In this review we will summarize current epigenetic approaches being applied to preclinical drug development addressing important therapeutic challenges in lung diseases. These challenges are being addressed by advances in lung delivery of oligonucleotides and small molecules that modify the histone code, DNA methylation patterns and miRNA function.
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Affiliation(s)
- Brian S Comer
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL, 36688, USA
| | - Mariam Ba
- Department of Pharmacology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Cherie A Singer
- Department of Pharmacology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - William T Gerthoffer
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL, 36688, USA.
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15
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Lockett GA, Patil VK, Soto-Ramírez N, Ziyab AH, Holloway JW, Karmaus W. Epigenomics and allergic disease. Epigenomics 2014; 5:685-99. [PMID: 24283882 DOI: 10.2217/epi.13.68] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Allergic disease development is affected by both genes and the environment, and epigenetic mechanisms are hypothesized to mediate these environmental effects. In this article, we discuss the link between the environment, DNA methylation and allergic disease, as well as questions of causality inherent to analyses of DNA methylation. From the practical side, we describe characteristics of allergic phenotypes and contrast different epidemiologic study designs used in epigenetic research. We examine methodological considerations, how best to conduct preprocessing and analysis of DNA methylation data sets, and the latest methods, technologies and discoveries in this rapidly advancing field. DNA methylation and other epigenetic marks are firmly entwined with allergic disease, a link that may hold the basis for future allergic disease diagnosis and treatment.
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Affiliation(s)
- Gabrielle A Lockett
- Human Development & Health, Faculty of Medicine, University of Southampton, Southampton, UK
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DNA methyltransferase 1(DNMT1) induced the expression of suppressors of cytokine signaling3 (Socs3) in a mouse model of asthma. Mol Biol Rep 2014; 41:4413-24. [PMID: 24599782 DOI: 10.1007/s11033-014-3312-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Accepted: 02/24/2014] [Indexed: 01/21/2023]
Abstract
DNMT1 is the most important methyltransferase enzyme, involved in the regulation of gene expression and appropriate histone modification. It interact with proliferating cell nuclear antigen (PCNA), SNF2 family member ATP-dependent chromatin remodeling enzyme, cyclin dependent kinases inhibitor, E2F1 transcription factor and HDACs to form a repressor complex known as HDAC complexes. The interaction of DNMT1 with numerous protein suppressors of promoters suggests that the enzyme is a crucial element of the transcription suppression complex. Since the mechanism behind over expression of Socs3 in Asthma is unclear, we study the Epigenetic mode of overexpression of Socs3 in terms of methylation/acetylation/inactivation of HDACs/activation of HATs enzymes in a mouse model of asthma. The results show that low expression of DNMT1 might indirectly induce the expression of Socs3 and HAT, and inhibit the expression of HDACs family. Furthermore knockdown of DNMT1 by siRNA induced expression of Socs3 while knock down of Socs3 by siRNA has no effect on DNMT1 expression. Our result suggests that the over expression of Socs3 is due to the inhibition of HDACs complex and hyperacetylation of histones molecule along with down regulation of DNMT1 gene. In depth study on DNMT1 might be useful for the development of therapeutic drug against asthma/allergic diseases.
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