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Wang K, Huang H, Zhan Q, Ding H, Li Y. Toll-like receptors in health and disease. MedComm (Beijing) 2024; 5:e549. [PMID: 38685971 PMCID: PMC11057423 DOI: 10.1002/mco2.549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 03/17/2024] [Accepted: 03/26/2024] [Indexed: 05/02/2024] Open
Abstract
Toll-like receptors (TLRs) are inflammatory triggers and belong to a family of pattern recognition receptors (PRRs) that are central to the regulation of host protective adaptive immune responses. Activation of TLRs in innate immune myeloid cells directs lymphocytes to produce the most appropriate effector responses to eliminate infection and maintain homeostasis of the body's internal environment. Inappropriate TLR stimulation can lead to the development of general autoimmune diseases as well as chronic and acute inflammation, and even cancer. Therefore, TLRs are expected to be targets for therapeutic treatment of inflammation-related diseases, autoimmune diseases, microbial infections, and human cancers. This review summarizes the recent discoveries in the molecular and structural biology of TLRs. The role of different TLR signaling pathways in inflammatory diseases, autoimmune diseases such as diabetes, cardiovascular diseases, respiratory diseases, digestive diseases, and even cancers (oral, gastric, breast, colorectal) is highlighted and summarizes new drugs and related clinical treatments in clinical trials, providing an overview of the potential and prospects of TLRs for the treatment of TLR-related diseases.
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Affiliation(s)
- Kunyu Wang
- Department of Head and Neck Oncology Surgery, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengduChina
| | - Hanyao Huang
- Department of Oral and Maxillofacial Surgery, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengduSichuanChina
| | - Qi Zhan
- Department of Head and Neck Oncology Surgery, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengduChina
| | - Haoran Ding
- Department of Head and Neck Oncology Surgery, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengduChina
| | - Yi Li
- Department of Head and Neck Oncology Surgery, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengduChina
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Li H, Gao S, Yang J, Zhang Y, Xuefei, Fan Y, Wang K. Prognostic value of genome-wide methylation in acute-on-chronic hepatitis B liver failure. Pathol Res Pract 2024; 256:155232. [PMID: 38452586 DOI: 10.1016/j.prp.2024.155232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/09/2024]
Abstract
AIM Methylation status of genome varies between pre-acute-on-chronic hepatitis B liver failure (pre-ACHBLF), acute-on-chronic hepatitis B liver failure (ACHBLF), and chronic hepatitis B patients. This study aimed to find better prognostic indicators for acute-on-chronic liver failure. METHODS The level of global genome methylation in peripheral blood mononuclear cells (PBMCs) was detected. The overall genome methylation rate was determined using MethylFlash™ Methylated DNA Quantification Kit(Colorimetric). DNMT activity were measured using DNA Methyltransferase Activity/Inhibition Assay Kit. Gene expression of DNA methyltransferases (DNMT),methyl-CpG-binding domain (MBD) were detected by qRT-PCR. RESULTS The global genome methylation level in ACHBLF group was significantly higher than that in chronic hepatitis B group (P<0.001). There was also obvious difference of the global genome methylation level between pre-ACHBLF group and CHB group (P<0.001). Meanwhile, the activity of DNMT in ACHBLF group was significantly higher than that in chronic hepatitis B group (P<0.001). The mRNA expression level of DNMT1 was higher than that in pre-ACHBLF group (P<0.01) and CHB group (PP<0.001). The mRNA expression level of MBD1 in ACHBLF group was also higher than that in CHB group (P<0.001) and healthy controls (HCs) (P<0.01). And the mRNA expression level of MBD3 and MBD4 in ACHBLF, pre-ACHBLF and CHB group were lower than that in HCs (P<0.001). Meanwhile we observed an opposite change in the mRNA expression level of MECP2. The ROC curve suggested that global genome methylation level was a better prognostic predictor than MELD score in ACHBLF (AUC 0.950, SE 0.0237, 95%CI 0.874-0.986 VS AUC 0.863, SE 0.0439, 95%CI 0.765-0.931, P=0.0429). CONCLUSIONS Genome methylation level can be a good biomarker in predicting the severity and prognosis of ACHBLF.
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Affiliation(s)
- Haiming Li
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China
| | - Shuai Gao
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China
| | - Jieru Yang
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China
| | - Ying Zhang
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China
| | - Xuefei
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China
| | - Yuchen Fan
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China; Institute of Hepatology, Shandong University, Jinan 250012, China
| | - Kai Wang
- Department of Hepatology, Shandong University Qilu Hospital, Jinan 250012, China; Institute of Hepatology, Shandong University, Jinan 250012, China.
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Gu Z, Yang J, Lu J, Yang M, Deng Y, Jiao Y. Whole-genome bisulfite sequencing reveals the function of DNA methylation in the allotransplantation immunity of pearl oysters. Front Immunol 2023; 14:1247544. [PMID: 37854612 PMCID: PMC10579932 DOI: 10.3389/fimmu.2023.1247544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/18/2023] [Indexed: 10/20/2023] Open
Abstract
Introduction In the pearl culture industry, a major challenge is the overactive immunological response in pearl oysters resulting from allotransplantation, leading to shell-bead rejection and death. To better understand the molecular mechanisms of postoperative recovery and the regulatory role of DNA methylation in gene expression, we analyzed the changes in DNA methylation levels after allotransplantation in pearl oyster Pinctada fucata martensii, and elucidated the regulatory function of DNA methylation in promoter activity of nicotinic acetylcholine receptor (nAChR) gene. Methods We constructed nine DNA methylomes at different time points after allotransplantation and used bisulfite genomic sequencing PCR technology (BSP) to verify the methylation status in the promoter of nAChR. We performed Dual luciferase assays to determine the effect of the dense methylation region in the promoter on transcriptional activity and used DNA pull-down and mass spectrometry analysis to assess the capability of transcription factor binding with the dense methylation region. Result The DNA methylomes reveal that CG-type methylation is predominant, with a trend opposite to non-CG-type methylation. Promoters, particularly CpG island-rich regions, were less frequently methylated than gene function elements. We identified 5,679 to 7,945 differentially methylated genes (DMGs) in the gene body, and 2,146 to 3,385 DMGs in the promoter at each time point compared to the pre-grafting group. Gene ontology and pathway enrichment analyses showed that these DMGs were mainly associated with "cellular process", "Membrane", "Epstein-Barr virus infection", "Notch signaling pathway", "Fanconi anemia pathway", and "Nucleotide excision repair". Our study also found that the DNA methylation patterns of the promoter region of nAChR gene were consistent with the DNA methylomics data. We further demonstrated that the dense methylation region in the promoter of nAChR affects transcriptional activity, and that the methylation status in the promoter modulates the binding of different transcription factors, particularly transcriptional repressors. Conclusion These findings enhance our understanding of the immune response and regulation mechanism induced by DNA methylation in pearl oysters after allotransplantation.
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Affiliation(s)
- Zefeng Gu
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Jingmiao Yang
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Jinzhao Lu
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Min Yang
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Yuewen Deng
- Fishery College, Guangdong Ocean University, Zhanjiang, China
- Pearl Breeding and Processing Engineering Technology Research Centre of Guangdong Province, Zhanjiang, China
- Guangdong Science and Innovation Center for Pearl Culture, Zhanjiang, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Zhanjiang, China
| | - Yu Jiao
- Fishery College, Guangdong Ocean University, Zhanjiang, China
- Pearl Breeding and Processing Engineering Technology Research Centre of Guangdong Province, Zhanjiang, China
- Guangdong Science and Innovation Center for Pearl Culture, Zhanjiang, China
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Zhang Q, Dan J, Meng S, Li Y, Li J. TLR4 inhibited autophagy by modulating PI3K/AKT/mTOR signaling pathway in Gastric cancer cell lines. Gene 2023:147520. [PMID: 37257791 DOI: 10.1016/j.gene.2023.147520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/20/2023] [Accepted: 05/26/2023] [Indexed: 06/02/2023]
Abstract
Toll-like receptors (TLRs) are pattern recognition receptors found on both immune and cancerous cells. Gastric cancer (GC) cells/tissues have been shown to exhibit elevated levels of TLR4. Here, we examined the role of TLR4 on autophagy and proliferation in GC cells. Real-time quantitative polymerase chain reaction (RT-qPCR) and western blot (WB) were used to determine TLR4 levels at different stages of GC cells/tissues as well as the levels of autophagy-related proteins (ARPs) and determine the underlying signaling mechanism. Proliferation was assessed via the CCK-8 assay. The protein and mRNA levels of ARPs were elucidated, followed by estimating the involved signaling pathways. Our results demonstrated that the modulation of the PI3K/AKT/mTOR pathway resulted from autophagy inhibition/induction, which was induced by the overexpression and knockdown of TLR4. Thus, TLR4 played a vital role in GC progression.
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Affiliation(s)
- Qian Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
| | - Jun Dan
- Department of Geriatric, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
| | - Shuang Meng
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
| | - Yingjie Li
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
| | - Jing Li
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China.
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Man SM, Jenkins BJ. Context-dependent functions of pattern recognition receptors in cancer. Nat Rev Cancer 2022; 22:397-413. [PMID: 35355007 DOI: 10.1038/s41568-022-00462-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/01/2022] [Indexed: 02/07/2023]
Abstract
The immune system plays a critical role in shaping all facets of cancer, from the early initiation stage through to metastatic disease and resistance to therapy. Our understanding of the importance of the adaptive arm of the immune system in antitumour immunity has led to the implementation of immunotherapy with immune checkpoint inhibitors in numerous cancers, albeit with differing efficacy. By contrast, the clinical utility of innate immunity in cancer has not been exploited, despite dysregulated innate immunity being a feature of at least one-third of all cancers associated with tumour-promoting chronic inflammation. The past two decades have seen innate immune pattern recognition receptors (PRRs) emerge as critical regulators of the immune response to microbial infection and host tissue damage. More recently, it has become apparent that in many cancer types, PRRs play a central role in modulating a vast array of tumour-inhibiting and tumour-promoting cellular responses both in immune cells within the tumour microenvironment and directly in cancer cells. Herein, we provide a comprehensive overview of the fast-evolving field of PRRs in cancer, and discuss the potential to target PRRs for drug development and biomarker discovery in a wide range of oncology settings.
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Affiliation(s)
- Si Ming Man
- Division of Immunity, Inflammation and Infection, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Brendan J Jenkins
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, Australia.
- Department of Molecular and Translational Science, School of Clinical Sciences, Monash University, Clayton, VIC, Australia.
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The selected epigenetic effects of phthalates: DBP, BBP and their metabolites: MBP, MBzP on human peripheral blood mononuclear cells (In Vitro). Toxicol In Vitro 2022; 82:105369. [PMID: 35487445 DOI: 10.1016/j.tiv.2022.105369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 03/27/2022] [Accepted: 04/21/2022] [Indexed: 11/21/2022]
Abstract
Phthalates are classified as non-genotoxic carcinogens. These compounds do not cause direct DNA damage but may induce indirect DNA lesions leading to cancer development. In the presented paper we have studied the effect of di-n-butyl phthalate (DBP), butylbenzyl phthalate (BBP), and their metabolites, such as mono-n-butyl phthalate (MBP) and monobenzyl phthalate (MBzP) on selected epigenetic parameters in human peripheral blood mononuclear cells (PBMCs). The cells were incubated with tested phthalates at 0.001, 0.01 and 0.1 μg/mL for 24 h. Next, global DNA methylation, methylation in the promoter regions of tumor suppressor genes (P16, TP53) and proto-oncogenes (BCL2, CCND1) were assessed as well as the expression profile of the indicated genes was analysed. The obtained results have revealed significant reduction of global DNA methylation level in PBMCs exposed to BBP, MBP and MBzP. Phthalates changed methylation pattern of the tested genes, decreased expression of P16 and TP53 genes and increased the expression of BCL2 and CCND1. In conclusion, our results have shown that the examined phthalates disturbed the processes of methylation and expression of tumor suppressor genes (P16, TP53) and protooncogenes (BCL2, CCND1) in human PBMCs.
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Mustafa S, Evans S, Barry B, Barratt D, Wang Y, Lin C, Wang X, Hutchinson MR. Toll-Like Receptor 4 in Pain: Bridging Molecules-to-Cells-to-Systems. Handb Exp Pharmacol 2022; 276:239-273. [PMID: 35434749 DOI: 10.1007/164_2022_587] [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] [Indexed: 06/14/2023]
Abstract
Pain impacts the lives of billions of people around the world - both directly and indirectly. It is complex and transcends beyond an unpleasant sensory experience to encompass emotional experiences. To date, there are no successful treatments for sufferers of chronic pain. Although opioids do not provide any benefit to chronic pain sufferers, they are still prescribed, often resulting in more complications such as hyperalgesia and dependence. In order to develop effective and safe medications to manage, and perhaps even treat pain, it is important to evaluate novel contributors to pain pathologies. As such, in this chapter we review the role of Toll-like receptor 4, a receptor of the innate immune system, that continues to gain substantial attention in the field of pain research. Positioned in the nexus of the neuro and immune systems, TLR4 may provide one of the missing pieces in understanding the complexities of pain. Here we consider how TLR4 enables a mechanistical understanding of pain as a multidimensional biopsychosocial state from molecules to cells to systems and back again.
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Affiliation(s)
- Sanam Mustafa
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia.
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, Australia.
| | - Samuel Evans
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Benjamin Barry
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Daniel Barratt
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Yibo Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Cong Lin
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Xiaohui Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China
| | - Mark R Hutchinson
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, Australia
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van Dokkum NH, Bachini S, Verkaik-Schakel RN, Baptist DH, Salavati S, Kraft KE, Scherjon SA, Bos AF, Plösch T. Differential Placental DNA Methylation of NR3C1 in Extremely Preterm Infants With Poorer Neurological Functioning. Front Pediatr 2022; 10:876803. [PMID: 35722484 PMCID: PMC9198301 DOI: 10.3389/fped.2022.876803] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Understanding underlying mechanisms of neurodevelopmental impairment following preterm birth may enhance opportunities for targeted interventions. We aimed to assess whether placental DNA methylation of selected genes affected early neurological functioning in preterm infants. METHODS We included 43 infants, with gestational age <30 weeks and/or birth weight <1,000 g and placental samples at birth. We selected genes based on their associations with several prenatal conditions that may be related to poor neurodevelopmental outcomes. We determined DNA methylation using pyrosequencing, and neurological functioning at 3 months post-term using Prechtl's General Movement Assessment, including the Motor Optimality Score-Revised (MOS-R). RESULTS Twenty-four infants had atypical MOS-R, 19 infants had near-optimal MOS-R. We identified differences in average methylation of NR3C1 (encoding for the glucocorticoid receptor) [3.3% (95%-CI: 2.4%-3.9%) for near-optimal vs. 2.3% (95%-CI: 1.7%-3.0%), p = 0.008 for atypical], and at three of the five individual CpG-sites. For EPO, SLC6A3, TLR4, VEGFA, LEP and HSD11B2 we found no differences between the groups. CONCLUSION Hypomethylation of NR3C1 in placental tissue is associated with poorer neurological functioning at 3 months post-term in extremely preterm infants. Alleviating stress during pregnancy and its impact on preterm infants and their neurodevelopmental outcomes should be further investigated.
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Affiliation(s)
- Nienke H van Dokkum
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Sofia Bachini
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Rikst Nynke Verkaik-Schakel
- Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Dyvonne H Baptist
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Sahar Salavati
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Karianne E Kraft
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Sicco A Scherjon
- Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Arend F Bos
- Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Torsten Plösch
- Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
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Rasmusson AJ, Gallwitz M, Soltanabadi B, Ciuculete DM, Mengel-From J, Christensen K, Nygaard M, Soerensen M, Boström AE, Fredriksson R, Freyhult E, Mwinyi J, Czamara D, Binder EB, Schiöth HB, Cunningham JL. Toll-like receptor 4 methylation grade is linked to depressive symptom severity. Transl Psychiatry 2021; 11:371. [PMID: 34226490 PMCID: PMC8257733 DOI: 10.1038/s41398-021-01481-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 04/27/2021] [Accepted: 05/11/2021] [Indexed: 02/06/2023] Open
Abstract
This study explores potential associations between the methylation of promoter-associated CpG sites of the toll-like receptor (TLR)-family, plasma levels of pro-inflammatory proteins and depressive symptoms in young female psychiatric patients. Ratings of depressive symptoms and blood samples were obtained from 92 young women seeking psychiatric care. Methylation of 32 promoter-associated CpG sites in TLR1 to TLR10 was analysed using the Illumina Infinium Methylation EPIC BeadChip. Expression levels of 91 inflammatory proteins were determined by proximity extension assay. Statistical correlations between depressive state, TLR1-10 methylation and inflammatory proteins were investigated. Four additional cohorts were studied to evaluate the generalizability of the findings. In the discovery cohort, methylation grade of cg05429895 (TLR4) in blood was inversely correlated with depressive symptoms score in young adults. After correction for multiple testing, plasma levels of macrophage inflammatory protein 1β (MIP-1β/CCL4) were associated with both TLR4 methylation and depressive symptom severity. A similar inverse association between TLR4 methylation in blood and affective symptoms score was also found in a cohort of 148 both males and females (<40 years of age) from the Danish Twin Registry. These findings were not, however, replicated in three other external cohorts; which differed from the first two cohorts by a higher age and mixed ethnicities, thus limiting the generalizability of our findings. However, TLR4 methylation inversely correlated with TLR4 mRNA expression in the Danish Twin Study indicating a functional significance of methylation at this particular CpG. Higher depression scores in young Scandinavian adults was associated with decreased methylation of TLR4 in blood.
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Affiliation(s)
- Annica J Rasmusson
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala University Hospital, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden
| | - Maike Gallwitz
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala University Hospital, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden
| | - Bardia Soltanabadi
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala University Hospital, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden
| | - Diana M Ciuculete
- Department of Neuroscience, Functional Pharmacology, Uppsala University, BMC, Box 593, 751 24, Uppsala, Sweden
| | - Jonas Mengel-From
- The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Kaare Christensen
- The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | - Marianne Nygaard
- The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Mette Soerensen
- The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | - Adrian E Boström
- Department of Neuroscience, Functional Pharmacology, Uppsala University, BMC, Box 593, 751 24, Uppsala, Sweden
| | - Robert Fredriksson
- Department of Pharmaceutical Biosciences, Molecular Neuropharmacology, Uppsala University, 75124, Uppsala, Sweden
| | - Eva Freyhult
- Department of Medical Sciences, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Jessica Mwinyi
- Department of Neuroscience, Functional Pharmacology, Uppsala University, BMC, Box 593, 751 24, Uppsala, Sweden
| | - Darina Czamara
- Department Translational Research in Psychiatry, Max-Planck-Institute of Psychiatry, Munich, Germany
| | - Elisabeth B Binder
- Department Translational Research in Psychiatry, Max-Planck-Institute of Psychiatry, Munich, Germany
| | - Helgi B Schiöth
- Department of Neuroscience, Functional Pharmacology, Uppsala University, BMC, Box 593, 751 24, Uppsala, Sweden
- Institute of Translational Medicine and Biotechnology, I. M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Janet L Cunningham
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala University Hospital, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.
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Feng Z, Meng R, Li Q, Li D, Xu Q. 5-aza-2'-deoxycytidine may regulate the inflammatory response of human odontoblast-like cells through the NF-κB pathway. Int Endod J 2021; 54:1105-1117. [PMID: 33539038 DOI: 10.1111/iej.13488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 11/28/2022]
Abstract
AIM To explore the role of DNA methylation in the innate immunity of the dental pulp, this study investigated the effect of 5-aza-2'-deoxycytidine (AZA) on lipoteichoic acid (LTA)-induced cytokine production and related intracellular signalling pathways in human odontoblast-like cells (hOBs). METHODOLOGY hOBs were cultured and differentiated from human dental pulp tissue, and the odontoblastic phenotype of the cells was detected using immunofluorescence, qRT-PCR and Western blotting. hOBs were pretreated with AZA and then stimulated with 10 μg mL-1 LTA. The levels of 42 cytokines related to immunity and inflammation were examined using a cytokine antibody array and verified using qRT-PCR and ELISA. The effect of AZA on the LTA-induced NF-κB and MAPK signalling pathways was explored using Western blotting. The cells were treated with the specific NF-κB inhibitor PDTC and MAPK inhibitors (the ERK inhibitor U0126, the p38 inhibitor SB203580, and the JNK inhibitor SP600125) to further confirm the role of the signalling pathways in LTA-treated hOBs. DNA immunoprecipitation-PCR was used to examine the dynamic methylation status of the gene promoters of myeloid differentiation primary response 88 (MyD88) and tumour necrosis factor receptor-associated factor 6 (TRAF6) in the LTA-induced hOBs. Statistical analyses of the differences between two groups were performed using Student's t-test. One-way analysis of variance (anova) or repeated-measures anova with a post hoc Dunnett's test was used to assess the differences between multiple sets of data. P < 0.05 was considered to be statistically significant. RESULTS The odontoblastic markers were significantly higher in hOBs than those in human dental pulp cells (hDPCs) (P < 0.05). According to the cytokine antibody array results, hOBs pretreated with AZA had significantly increased production of several inflammatory cytokines (P < 0.05), in which the expression levels of IL-6 and IL-8 were the most dramatically increased upon LTA stimulation (P < 0.01). Furthermore, AZA resulted in the significant upregulation of p-IKKα/β, p-IκBα, p-p65, p-p38 and p-ERK in LTA-stimulated hOBs (P < 0.01). Treatment with the NF-κB pathway inhibitor suppressed both IL-6 and IL-8 expression (P < 0.05), whereas inhibitors of the MAPK pathway (SB203580 and SP600125) did not. In LTA-treated hOBs, AZA significantly increased the expression levels of TRAF6 and MyD88 (P < 0.05). AZA induced MyD88 promoter hypomethylation but did not affect TRAF6 methylation. CONCLUSION AZA regulated the LTA-induced inflammatory response through the NF-κB signal pathway in hOBs. This study highlights the important role of DNA methylation in the immunity defence of odontoblasts during the dental pulp immunity response to caries.
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Affiliation(s)
- Z Feng
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - R Meng
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Department of Stomatology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Q Li
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - D Li
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Q Xu
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
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11
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Klerk DH, Plösch T, Verkaik-Schakel RN, Hulscher JBF, Kooi EMW, Bos AF. DNA Methylation of TLR4, VEGFA, and DEFA5 Is Associated With Necrotizing Enterocolitis in Preterm Infants. Front Pediatr 2021; 9:630817. [PMID: 33748044 PMCID: PMC7969816 DOI: 10.3389/fped.2021.630817] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 02/11/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Epigenetic changes, such as DNA methylation, may contribute to an increased susceptibility for developing necrotizing enterocolitis (NEC) in preterm infants. We assessed DNA methylation in five NEC-associated genes, selected from literature: EPO, VEGFA, ENOS, DEFA5, and TLR4 in infants with NEC and controls. Methods: Observational cohort study including 24 preterm infants who developed NEC (≥Bell Stage IIA) and 45 matched controls. DNA was isolated from stool samples and methylation measured using pyrosequencing. We investigated differences in methylation prior to NEC compared with controls. Next, in NEC infants, we investigated methylation patterns long before, a short time before NEC onset, and after NEC. Results: Prior to NEC, only TLR4 CpG 2 methylation was increased in NEC infants (median = 75.4%, IQR = 71.3-83.8%) versus controls (median = 69.0%, IQR = 64.5-77.4%, p = 0.025). In NEC infants, VEGFA CpG 3 methylation was 0.8% long before NEC, increasing to 1.8% a short time before NEC and 2.0% after NEC (p = 0.011; p = 0.021, respectively). A similar pattern was found in DEFA5 CpG 1, which increased from 75.4 to 81.4% and remained 85.3% (p = 0.027; p = 0.019, respectively). These changes were not present for EPO, ENOS, and TLR4. Conclusion: Epigenetic changes of TLR4, VEGFA, and DEFA5 are present in NEC infants and can differ in relation to the time of NEC onset. Differences in DNA methylation of TLR4, VEGFA, and DEFA5 may influence gene expression and increase the risk for developing NEC. This study also demonstrates the use of human DNA extraction from stool samples as a novel non-invasive method for exploring the bowel of preterm infants and which can also be used for necrotizing enterocolitis patients.
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Affiliation(s)
- Daphne H Klerk
- Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Torsten Plösch
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Rikst Nynke Verkaik-Schakel
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Jan B F Hulscher
- Division of Pediatric Surgery, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Elisabeth M W Kooi
- Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Arend F Bos
- Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
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12
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Rezasoltani S, Ghanbari R, Looha MA, Mojarad EN, Yadegar A, Stewart D, Aghdaei HA, Zali MR. Expression of Main Toll-Like Receptors in Patients with Different Types of Colorectal Polyps and Their Relationship with Gut Microbiota. Int J Mol Sci 2020; 21:ijms21238968. [PMID: 33255933 PMCID: PMC7729598 DOI: 10.3390/ijms21238968] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/23/2020] [Accepted: 11/23/2020] [Indexed: 12/14/2022] Open
Abstract
Abnormal activation of Toll-like receptor (TLRs) signaling can result in colon cancer development. The aim of this study was to investigate the expression of important TLRs in different histological types of colorectal polyps and evaluate their relationship with intestinal microbiota. The expression levels of TLR2, 3, 4, and 5 were analyzed in intestinal biopsy specimens of 21 hyperplastic polyp (HP), 16 sessile serrated adenoma (SSA), 29 tubular adenoma (TA), 21 villous/tubulovillous (VP/TVP) cases, and 31 normal controls. In addition, selected gut bacteria including Streptococcus bovis, Enterococcus faecalis, Enterotoxigenic Bacteroides fragilis (ETBF), Fusobacterium nucleatum, Porphyromonas spp., Lactobacillus spp., Roseburia spp., and Bifidobacterium spp. were quantified in fecal samples using absolute qRT PCR, and, finally, the association between TLRs and these gut microbiota- was evaluated by Spearman’s correlation coefficient. Higher expression of TLR2 and TLR4 in VP/TVP and TA, and lower expression levels of TLR3 and TLR5 in all type of polyps were observed. The differences in TLR expression patterns was not only dependent on the histology, location, size, and dysplasia grade of polyps but also related to the intestinal microbiota patterns. TLR2 and TLR4 expression was directly associated with the F. nucleatum, E. faecalis, S. bovis, Porphyromonas, and inversely to Bifidobacterium, Lactobacillus, and Roseburia quantity. Furthermore, TLR3 and TLR5 expression was directly associated with Bifidobacterium, Roseburia, and Lactobacillus quantity. Our results suggest a possible critical role of TLRs during colorectal polyp progression. An abnormal regulation of TLRs in relation to gut microbial quantity may contribute to carcinogenesis.
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Affiliation(s)
- Sama Rezasoltani
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran; (S.R.); (M.A.L.)
| | - Reza Ghanbari
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1411713135, Iran;
| | - Mehdi Azizmohammad Looha
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran; (S.R.); (M.A.L.)
| | - Ehsan Nazemalhosseini Mojarad
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran; (E.N.M.); (M.R.Z.)
| | - Abbas Yadegar
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran;
| | - Delisha Stewart
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC 28081, USA
- Correspondence: (D.S.); (H.A.A.); Tel.: +1-704-250-5068 (D.S.); +98-212-243-2539 (H.A.A.)
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran; (S.R.); (M.A.L.)
- Correspondence: (D.S.); (H.A.A.); Tel.: +1-704-250-5068 (D.S.); +98-212-243-2539 (H.A.A.)
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717411, Iran; (E.N.M.); (M.R.Z.)
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13
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Woods SE. Immunosuppression is associated with epigenetic remodelling in a murine model of exertional heat stroke. J Physiol 2020; 599:1373-1374. [PMID: 33210295 DOI: 10.1113/jp280949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Siobhan E Woods
- Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
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14
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Chen YC, Lee CP, Hsiao CC, Hsu PY, Wang TY, Wu CC, Chao TY, Leung SY, Chang YP, Lin MC. MicroRNA-23a-3p Down-Regulation in Active Pulmonary Tuberculosis Patients with High Bacterial Burden Inhibits Mononuclear Cell Function and Phagocytosis through TLR4/TNF-α/TGF-β1/IL-10 Signaling via Targeting IRF1/SP1. Int J Mol Sci 2020; 21:E8587. [PMID: 33202583 PMCID: PMC7697976 DOI: 10.3390/ijms21228587] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/29/2020] [Accepted: 11/11/2020] [Indexed: 12/16/2022] Open
Abstract
The aim of this study is to explore the role of microRNAs (miR)-21/23a/146a/150/155 targeting the toll-like receptor pathway in active tuberculosis (TB) disease and latent TB infection (LTBI). Gene expression levels of the five miRs and predicted target genes were assessed in peripheral blood mononuclear cells from 46 patients with active pulmonary TB, 15 subjects with LTBI, and 17 non-infected healthy subjects (NIHS). THP-1 cell lines were transfected with miR-23a-3p mimics under stimuli with Mycobacterium TB-specific antigens. Both miR-155-5p and miR-150-5p gene expressions were decreased in the active TB group versus the NIHS group. Both miR-23a-3p and miR-146a-5p gene expressions were decreased in active TB patients with high bacterial burden versus those with low bacterial burden or control group (LTBI + NIHS). TLR2, TLR4, and interleukin (IL)10 gene expressions were all increased in active TB versus NIHS group. MiR-23a-3p mimic transfection reversed ESAT6-induced reduction of reactive oxygen species generation, and augmented ESAT6-induced late apoptosis and phagocytosis, in association with down-regulations of the predicted target genes, including tumor necrosis factor (TNF)-α, TLR4, TLR2, IL6, IL10, Notch1, IL6R, BCL2, TGF-β1, SP1, and IRF1. In conclusion, the down-regulation of miR-23a-3p in active TB patients with high bacterial burden inhibited mononuclear cell function and phagocytosis through TLR4/TNF-α/TGF-β1/IL-10 signaling via targeting IRF1/SP1.
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Affiliation(s)
- Yung-Che Chen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
- Department of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chiu Ping Lee
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Chang-Chun Hsiao
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Po-Yuan Hsu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan
| | - Ting-Ya Wang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Chao-Chien Wu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Tung-Ying Chao
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Sum-Yee Leung
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Yu-Ping Chang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
| | - Meng-Chih Lin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan; (C.P.L.); (C.-C.H.); (P.-Y.H.); (T.-Y.W.); (C.-C.W.); (T.-Y.C.); (S.-Y.L.); (Y.-P.C.)
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15
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Zhao Z, Su Z, Liang P, Liu D, Yang S, Wu Y, Ma L, Feng J, Zhang X, Wu C, Huang J, Cui J. USP38 Couples Histone Ubiquitination and Methylation via KDM5B to Resolve Inflammation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2002680. [PMID: 33240782 PMCID: PMC7675183 DOI: 10.1002/advs.202002680] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/24/2020] [Indexed: 05/15/2023]
Abstract
Chromatin modifications, such as histone acetylation, ubiquitination, and methylation, play fundamental roles in maintaining chromatin architecture and regulating gene transcription. Although their crosstalk in chromatin remodeling has been gradually uncovered, the functional relationship between histone ubiquitination and methylation in regulating immunity and inflammation remains unclear. Here, it is reported that USP38 is a novel histone deubiquitinase that works together with the histone H3K4 modifier KDM5B to orchestrate inflammatory responses. USP38 specifically removes the monoubiquitin on H2B at lysine 120, which functions as a prerequisite for the subsequent recruitment of demethylase KDM5B to the promoters of proinflammatory cytokines Il6 and Il23a during LPS stimulation. KDM5B in turn inhibits the binding of NF-κB transcription factors to the Il6 and Il23a promoters by reducing H3K4 trimethylation. Furthermore, USP38 can bind to KDM5B and prevent it from proteasomal degradation, which further enhances the function of KDM5B in the regulation of inflammation-related genes. Loss of Usp38 in mice markedly enhances susceptibility to endotoxin shock and acute colitis, and these mice display a more severe inflammatory phenotype compared to wild-type mice. The studies identify USP38-KDM5B as a distinct chromatin modification complex that restrains inflammatory responses through manipulating the crosstalk of histone ubiquitination and methylation.
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Affiliation(s)
- Zhiyao Zhao
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
- Department of Internal MedicineGuangzhou Institute of PediatricsGuangzhou Women and Children's Medical CenterGuangzhouGuangdong510623China
| | - Zexiong Su
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Puping Liang
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Di Liu
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Shuai Yang
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Yaoxing Wu
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Ling Ma
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Junyan Feng
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Xiya Zhang
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Chenglei Wu
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Junjiu Huang
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
| | - Jun Cui
- MOE Key Laboratory of Gene Function and RegulationState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat‐sen UniversityGuangzhouGuangdong510006China
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16
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Woźniak E, Reszka E, Jabłońska E, Mokra K, Balcerczyk A, Huras B, Zakrzewski J, Bukowska B. The selected epigenetic effects of aminomethylphosphonic acid, a primary metabolite of glyphosate on human peripheral blood mononuclear cells (in vitro). Toxicol In Vitro 2020; 66:104878. [PMID: 32360641 DOI: 10.1016/j.tiv.2020.104878] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/18/2020] [Accepted: 04/26/2020] [Indexed: 12/20/2022]
Abstract
Aminomethylphosphonic acid (AMPA) is a primary metabolite of glyphosate and amino-polyphosphonate. We have determined the effect of AMPA on selected epigenetic parameters and major cell cycle drivers in human peripheral blood mononuclear cells (PBMCs). The cells were incubated with AMPA at 0.5, 10 and 250 μM for 24 h. The performed analysis included: global DNA methylation by colorimetric measurement of 5-methylcytosine in DNA, methylation in the promoter regions of selected tumor suppressor genes (P16, P21, TP53) and proto-oncogenes (BCL2, CCND1) as well as the expression profile of the indicated genes by Real-Time PCR assays. The obtained results have revealed significant reduction of global DNA methylation level in PBMCs exposed to AMPA. Investigated xenobiotic changed methylation pattern of the P21 and TP53 suppressor gene promoters, but in case of other analyzed genes: P16, BCL2 and CCND1 no statistically significant changes have been noted. Gene profiling have shown that AMPA only changed the expression of CCND1. Summing up, our results have revealed a small potential disturbance in methylation processes and the absence of changes in expression of tested tumor suppressor genes (P16, P21, TP53) and protooncogenes (BCL2) in human PBMCs exposed to AMPA.
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Affiliation(s)
- Ewelina Woźniak
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Biophysics of Environmental Pollution, Pomorska Str. 141/143, 90-236 Lodz, Poland; Medical University of Lodz, Department of Internal Diseases and Clinical Pharmacology, Laboratory of Tissue Immunopharmacology, Kniaziewicza Str. 1/5, 91-347 Lodz, Poland
| | - Edyta Reszka
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, Teresy Str. 8, 91-348 Lodz, Poland
| | - Ewa Jabłońska
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, Teresy Str. 8, 91-348 Lodz, Poland
| | - Katarzyna Mokra
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Biophysics of Environmental Pollution, Pomorska Str. 141/143, 90-236 Lodz, Poland
| | - Aneta Balcerczyk
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Molecular Biophysics, Pomorska Str. 141/143, 90-236 Lodz, Poland
| | - Bogumiła Huras
- Łukasiewicz Research Network, Institute of Industrial Organic Chemistry, Annopol 6 Str, 03-236 Warsaw, Poland
| | - Jerzy Zakrzewski
- Łukasiewicz Research Network, Institute of Industrial Organic Chemistry, Annopol 6 Str, 03-236 Warsaw, Poland
| | - Bożena Bukowska
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Biophysics of Environmental Pollution, Pomorska Str. 141/143, 90-236 Lodz, Poland.
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17
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Fernández A, Veloso P, Astorga J, Rodríguez C, Torres VA, Valdés M, Garrido M, Gebicke-Haerter PJ, Hernández M. Epigenetic regulation of TLR2-mediated periapical inflammation. Int Endod J 2020; 53:1229-1237. [PMID: 32426871 DOI: 10.1111/iej.13329] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 05/12/2020] [Indexed: 12/14/2022]
Abstract
AIM To determine the methylation pattern of TLR2 gene promoter and its association with the transcriptional regulation of periapical inflammatory and angiogenic responses in symptomatic and asymptomatic forms of apical periodontitis. METHODOLOGY In this cross-sectional study, apical lesions were obtained from volunteers with asymptomatic apical periodontitis (AAP) (n = 17) and symptomatic apical periodontitis (SAP) (n = 17) scheduled for tooth extraction, and both total RNA and DNA were extracted. DNA was bisulfite-treated, a region of CpG island within the TLR2 gene was amplified by qPCR and the products were sequenced. Additionally, the mRNA expression of TLR2, TLR4, IL-6, IL-12, TNFalpha, IL-23, IL-10, TGFbeta, VEGFA and CDH5 was analysed by qPCR. The data were analysed with chi-square tests, Mann-Whitney or unpaired t-tests, and Spearman´s correlation; variable adjustments were performed using multiple linear regression (P < 0.05). RESULTS TLR2 depicted a hypomethylated DNA profile at the CpG island in SAP when compared with AAP, along with upregulated expression of TLR2, with pro-inflammatory cytokines IL-6 and IL-23, and the angiogenesis marker CDH5 (P < 0.05). TLR2 methylation percentage negatively correlated with mRNA levels of IL-23 and CDH5 in apical periodontitis. Lower methylation frequencies of single CpG dinucleotides -8 and -10 localized in close proximity to nuclear factor κB (NFκB) binding within the TLR2 promoter were identified in SAP versus AAP (P < 0.05). Finally, unmethylated -10 and -8 single sites demonstrated up-regulation of IL-23, IL-10 and CDH5 transcripts compared to their methylated counterparts (P < 0.05). CONCLUSIONS TLR2 gene promoter hypomethylation was linked to transcriptional activity of pro-inflammatory cytokines and angiogenic markers in exacerbated periapical inflammation. Moreover, unmethylated single sites in close proximity to NFκB binding were involved in active transcription of IL-23, IL-10 and CDH5.
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Affiliation(s)
- A Fernández
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Faculty of Dentistry, Universidad Andres Bello, Santiago, Chile
| | - P Veloso
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - J Astorga
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - C Rodríguez
- Faculty of Dentistry, Universidad Andres Bello, Santiago, Chile
| | - V A Torres
- Faculty of Dentistry, Universidad de Chile, Institute for Research in Dental Sciences, Santiago, Chile
| | - M Valdés
- School of Public Health, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - M Garrido
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - P J Gebicke-Haerter
- Program of Immunology, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.,Institute of Psychopharmacology, Faculty of Medicine, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
| | - M Hernández
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Department of Pathology and Oral Medicine, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
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18
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Kolahi S, Rashtchizadeh N, Mahdavi AM, Farhadi J, Khabbazi A, Sakhinia E, Bahavarnia N, Farajzadeh Polsangi MJ, Babaloo Z, Estiar MA. Evaluation of DNA methylation status of toll-like receptors 2 and 4 promoters in Behcet's disease. J Gene Med 2020; 22:e3234. [PMID: 32449979 DOI: 10.1002/jgm.3234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/19/2020] [Accepted: 05/18/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Altered innate immune function plays an important role in the initiation of inflammatory response in Behcet's disease (BD). Toll-like receptors (TLRs) are the master regulators of the innate immune system. Because the role of TLRs remains unknown in the pathogenesis of BD, the present study aimed to evaluate the expression levels and methylation status of the TLR2 and TLR4 promoters in patients with BD. METHODS In the present study, Iranian Azeri BD patients (n = 47) with an active (n = 22) and inactive (n = 25) period, and healthy controls (n = 61), were matched according to age, sex and ethnicity. TLR2 and TLR4 genes promoter CpG islands were predicted with the Eukaryotic Promoter Database (https://epd.vital-it.ch). Methylated DNA immunoprecipitation (MeDIP) was conducted. RESULTS The results showed that mRNA of TLR4 was significantly increased in the peripheral blood mononuclear cells (PBMCs) of BD patients with an active phase compared to the control group. Differences in mRNA of TLR4 between the inactive BD and control groups were not significant. Differences in TLR2 mRNA levels in the PBMCs of the active and inactive phase BD and control groups were not significant. The methylation rate of TLR4 gene promoter was significantly lower in the active and inactive BD groups compared to the control group. The difference between the active and inactive BD groups was not significant. There was no significant difference in the methylation rates of the TLR2 gene between studied groups. CONCLUSIONS Our preliminary findings suggest that the hypomethylation of TLR4 gene may be involved in the pathogenesis of BD via increasing TLR4 expression.
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Affiliation(s)
- Sousan Kolahi
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nadereh Rashtchizadeh
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aida Malek Mahdavi
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jafar Farhadi
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Khabbazi
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ebrahim Sakhinia
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Division of Regenerative Medicine, School of Medicine, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
| | - Neda Bahavarnia
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Zohreh Babaloo
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehrdad A Estiar
- Department of Human Genetics, Faculty of Medicine, McGill University, Montréal, QC, Canada.,Montreal Neurological Institute and Hospital, McGill University, Montréal, QC, Canada
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19
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Hanson HE, Koussayer B, Kilvitis HJ, Schrey AW, Maddox JD, Martin LB. Epigenetic Potential in Native and Introduced Populations of House Sparrows (Passer domesticus). Integr Comp Biol 2020; 60:1458-1468. [PMID: 32497186 DOI: 10.1093/icb/icaa060] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Epigenetic potential, defined as the capacity for epigenetically-mediated phenotypic plasticity, may play an important role during range expansions. During range expansions, populations may encounter relatively novel challenges while experiencing lower genetic diversity. Phenotypic plasticity via epigenetic potential might be selectively advantageous at the time of initial introduction or during spread into new areas, enabling introduced organisms to cope rapidly with novel challenges. Here, we asked whether one form of epigenetic potential (i.e., the abundance of CpG sites) in three microbial surveillance genes: Toll-like receptors (TLRs) 1B (TLR1B), 2A (TLR2A), and 4 (TLR4) varied between native and introduced house sparrows (Passer domesticus). Using an opportunistic approach based on samples collected from sparrow populations around the world, we found that introduced birds had more CpG sites in TLR2A and TLR4, but not TLR1B, than native ones. Introduced birds also lost more CpG sites in TLR1B, gained more CpG sites in TLR2A, and lost fewer CpG sites in TLR4 compared to native birds. These results were not driven by differences in genetic diversity or population genetic structure, and many CpG sites fell within predicted transcription factor binding sites (TFBS), with losses and gains of CpG sites altering predicted TFBS. Although we lacked statistical power to conduct the most rigorous possible analyses, these results suggest that epigenetic potential may play a role in house sparrow range expansions, but additional work will be critical to elucidating how epigenetic potential affects gene expression and hence phenotypic plasticity at the individual, population, and species levels.
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Affiliation(s)
- Haley E Hanson
- Global and Planetary Health, University of South Florida, 3720 Spectrum Blvd, Suite 304, Tampa, FL 33620, USA
| | - Bilal Koussayer
- Global and Planetary Health, University of South Florida, 3720 Spectrum Blvd, Suite 304, Tampa, FL 33620, USA
| | - Holly J Kilvitis
- Department of Integrative Biology, University of South Florida, 4202 E. Fowler Ave, SCA110, Tampa, FL 33620, USA
| | - Aaron W Schrey
- Department of Biology, Georgia Southern University, Armstrong Campus, 11935 Abercorn St, SC1010, Savannah, GA 31419, USA
| | - J Dylan Maddox
- Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA.,Laboratorio de Biotecnología y Bioenergética, Universidad Científica del Perú, Iquitos, Perú.,American Public University System, Environmental Sciences, Charles Town, WV 25414, USA
| | - Lynn B Martin
- Global and Planetary Health, University of South Florida, 3720 Spectrum Blvd, Suite 304, Tampa, FL 33620, USA
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20
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Woźniak E, Reszka E, Jabłońska E, Balcerczyk A, Broncel M, Bukowska B. Glyphosate affects methylation in the promoter regions of selected tumor suppressors as well as expression of major cell cycle and apoptosis drivers in PBMCs (in vitro study). Toxicol In Vitro 2020; 63:104736. [PMID: 31751608 DOI: 10.1016/j.tiv.2019.104736] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/08/2019] [Accepted: 11/17/2019] [Indexed: 12/31/2022]
Abstract
We have determined the effect of glyphosate on selected epigenetic parameters and major cell cycle drivers in human peripheral blood mononuclear cells (PBMCs). The cells were incubated with glyphosate at 0.5, 10 and 100 μM. The analysis included: global DNA methylation, methylation in the promoter regions of tumor suppressor genes (P16, P21, TP53) and proto-oncogenes (BCL2, CCND1) by the Real-Time PCR and the expression profile of the indicated genes by Real-Time PCR. The obtained results have revealed significant reduction of global DNA methylation level in PBMCs exposed to glyphosate. Tested compound changed methylation pattern of the P21 and TP53 suppressor gene promoters, but in case of other analyzed genes: P16, BCL2 and CCND1 we did not identify any statistically significant changes. Gene profiling showed that glyphosate changed the expression of genes involved in the regulation of cell cycle and apoptosis. Glyphosate decreased expression of P16 and TP53 as well as an increase in the expression of BCl2, CCND1 and P21. Summing up, our results have shown a potential disturbance in methylation processes and gene expression in human PBMCs exposed to glyphosate, but the observed changes do not prejudge about the final metabolic effects, which are depended on many other factors.
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Affiliation(s)
- Ewelina Woźniak
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Biophysics of Environmental Pollution, Pomorska Str. 141/143, 90-236 Lodz, Poland; Medical University of Lodz, Department of Internal Diseases and Clinical Pharmacology, Laboratory of Tissue Immunopharmacology, Kniaziewicza Str. 1/5, 91-347 Lodz, Poland.
| | - Edyta Reszka
- Department of Molecular Genetics and Epigenetics, Nofer Institute of Occupational Medicine, Teresy Str. 8, 91-348 Lodz, Poland
| | - Ewa Jabłońska
- Department of Molecular Genetics and Epigenetics, Nofer Institute of Occupational Medicine, Teresy Str. 8, 91-348 Lodz, Poland
| | - Aneta Balcerczyk
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Molecular Biophysics, Pomorska Str. 141/143, 90-236 Lodz, Poland
| | - Marlena Broncel
- Medical University of Lodz, Department of Internal Diseases and Clinical Pharmacology, Laboratory of Tissue Immunopharmacology, Kniaziewicza Str. 1/5, 91-347 Lodz, Poland
| | - Bożena Bukowska
- University of Lodz, Faculty of Biology and Environmental Protection, Department of Biophysics of Environmental Pollution, Pomorska Str. 141/143, 90-236 Lodz, Poland
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21
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Feng Z, Zhan M, Meng R, Wang X, Xu Q. 5-Aza-2'-deoxycytidine enhances lipopolysaccharide-induced inflammatory cytokine expression in human dental pulp cells by regulating TRAF6 methylation. Bioengineered 2019; 10:197-206. [PMID: 31117883 PMCID: PMC6550546 DOI: 10.1080/21655979.2019.1621135] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Dental pulp inflammation is a common bacterially driven inflammation characterized by the local accumulation of inflammatory mediators in human dental pulp. DNA methylation is a crucial epigenetic modification that that plays a fundamental role in gene transcription, and its role in inflammation-related diseases has recently attracted attention. However, its role in dental pulp inflammation is poorly understood. This study is aimed to elucidate the role of DNA methylation in lipopolysaccharide (LPS)-induced inflammatory reaction in human dental pulp cells (hDPCs). hDPCs were pretreated with DNA methylation inhibitor 5-aza-2ʹ-deoxycytidine (5-Aza-CdR) and a cytokine antibody array was used to detect LPS-induced cytokine expression. The results indicated that 5-Aza-CdR significantly increased the expression of several pro-inflammatory cytokines in LPS-treated cells, including IL-6, IL-8, GM-CSF, MCP-2 and RANTES. The increased expression levels of IL-6 and IL-8 were further verified by qRT-PCR and ELISA. Furthermore, pretreatment with 5-Aza-CdR resulted in upregulation of p-IKKα/β, p-IκBα, p-p65 and p-ERK in the NK-κB and MAPK pathways. In addition, the 5mC level of the TRAF6 promoter was significantly decreased following 5-Aza-CdR pretreatment in the LPS-stimulated hDPCs. The findings indicate that 5-Aza-CdR significantly enhances the expression of proinflammatory cytokines and activates the NF-κB and MAPK signaling pathways by eliciting a decline in the 5mc level in the TRAF6 promoter in hDPCs, suggesting that DNA methylation may play an important role in dental pulp inflammation. This study highlights the important role of DNA methylation in the immunity defense of dental pulp infection.
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Affiliation(s)
- Zhihui Feng
- a Guanghua School of Stomatology & Guangdong Provincial Key Laboratory of Stomatology , Sun Yat-sen University , Guangzhou , China
| | - Minkang Zhan
- a Guanghua School of Stomatology & Guangdong Provincial Key Laboratory of Stomatology , Sun Yat-sen University , Guangzhou , China
| | - Runsha Meng
- a Guanghua School of Stomatology & Guangdong Provincial Key Laboratory of Stomatology , Sun Yat-sen University , Guangzhou , China
| | - Xinxuan Wang
- a Guanghua School of Stomatology & Guangdong Provincial Key Laboratory of Stomatology , Sun Yat-sen University , Guangzhou , China
| | - Qiong Xu
- a Guanghua School of Stomatology & Guangdong Provincial Key Laboratory of Stomatology , Sun Yat-sen University , Guangzhou , China
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22
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Cai L, Zhan M, Li Q, Li D, Xu Q. DNA methyltransferase DNMT1 inhibits lipopolysaccharide‑induced inflammatory response in human dental pulp cells involving the methylation changes of IL‑6 and TRAF6. Mol Med Rep 2019; 21:959-968. [PMID: 31974603 DOI: 10.3892/mmr.2019.10860] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 11/05/2019] [Indexed: 11/05/2022] Open
Abstract
Dental pulp inflammation is a pathological process characterized by local lesions in dental pulp and the accumulation of inflammatory mediators. DNA methylation of cytosine residues is a key epigenetic modification that is essential for gene transcription, and plays pivotal roles in inflammatory reactions and immune responses. However, the function of cytosine DNA methylation in the innate immune defense against the inflammation of dental pulp is poorly understood. To investigate the effect of DNA methylation in inflamed dental pulp upon innate immune responses, expression levels of the DNA methyltransferases (DNMT1, DNMT3a and DNMT3b) in human dental pulp cells (hDPCs) after lipopolysaccharide (LPS) stimulation were evaluated by western blotting and reverse transcription‑quantitative (RT‑q) PCR. Only DNMT1 expression was decreased, while the transcription of inflammatory cytokines was increased. In the immune responses of LPS‑induced hDPCs, the results of RT‑qPCR and ELISA showed that DNMT1 knockdown promoted the production of the pro‑inflammatory cytokines, interleukin (IL)‑6 and IL‑8. Western blotting demonstrated that DNMT1 knockdown increased the phosphorylation levels of IKKα/β and p38 in the NF‑κB and MAPK signaling pathways, respectively. Furthermore, MeDIP and RT‑qPCR analysis demonstrated that the 5‑methylcytosine levels of the IL‑6 and TNF receptor‑associated factor 6 (TRAF6) promoters were significantly decreased in DNMT1‑deficient hDPCs. Taken together, these results indicated that the expression of DNMT1 was decreased after LPS stimulation in hDPCs. DNMT1 depletion increased LPS‑induced cytokine secretion, and activated NF‑κB and MAPK signaling; these mechanisms may involve the decreased methylation levels of the IL‑6 and TRAF6 gene promoters. This study emphasized the role of DNMT1‑dependent DNA methylation on the inflammation of LPS‑infected dental pulp and provides a new rationale for the investigation of the molecular mechanisms of inflamed dental pulps.
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Affiliation(s)
- Luhui Cai
- Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Minkang Zhan
- Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Qimeng Li
- Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Di Li
- Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Qiong Xu
- Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
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23
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Zhang L, Tao X, Fu Q, Ge C, Li R, Li Z, Zhu Y, Tian H, Li Q, Liu M, Hu H, Zeng B, Lin Z, Li C, Luo R, Song X. Curcumin inhibits cell proliferation and migration in NSCLC through a synergistic effect on the TLR4/MyD88 and EGFR pathways. Oncol Rep 2019; 42:1843-1855. [PMID: 31432177 PMCID: PMC6775800 DOI: 10.3892/or.2019.7278] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 05/31/2019] [Indexed: 02/07/2023] Open
Abstract
Despite the increasing number of available therapeutic methods, the prognosis of non-small cell lung cancer (NSCLC) remains poor. Furthermore, side effects are an important limiting factor in the treatment of NSCLC. Therefore, developing an efficacious, safe, affordable and easily accessible chemotherapeutic agent is necessary for NSCLC treatment. As a natural chemical produced by Zingiberaceae plants, curcumin exerts distinct antitumor effects on several tumor types. In the present study, curcumin was observed to inhibit not only cell proliferation and cell cycle transition, but also cell migration in NSCLC, as determined by a series of experiments (such as MTS assay, colony formation assay, flow cytometric analysis, Transwell migration assay and western blotting). Mechanistically, curcumin induced G2/M phase arrest by controlling cell cycle- and epithelial-mesenchymal transition (EMT)-related checkpoints. Furthermore, curcumin significantly inhibited the expression of Toll-like receptor 4 (TLR4)/MyD88 and EGFR in a dose- and time-dependent manner. Conversely, EGF reversed the inhibitory action of curcumin on TLR4/MyD88. In clinical specimens, TLR4 and MyD88 were highly expressed in NSCLC tissues, and a significant positive association was observed between TLR4 and MyD88 expression. These data suggested that curcumin may control the EGFR and TLR4/MyD88 pathways to synergistically downregulate downstream cell cycle- and EMT-related regulators, in order to block cell proliferation and metastasis in NSCLC. These findings provide evidence for the clinical application of curcumin.
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Affiliation(s)
- Lanfeng Zhang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, P.R. China
| | - Xingyu Tao
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, P.R. China
| | - Qiaofen Fu
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Chunlei Ge
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Ruilei Li
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Zhen Li
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Ye Zhu
- Department of Medical Oncology, The Central Hospital of Hengyang, Hengyang, Hunan 421000, P.R. China
| | - Hui Tian
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Qiaolin Li
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Min Liu
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Hongyan Hu
- Department of Pathology, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Baozhen Zeng
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Zhuyin Lin
- Central Laboratory of Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan 650051, P.R. China
| | - Chunyan Li
- Department of Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan 510118, P.R. China
| | - Rongcheng Luo
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, P.R. China
| | - Xin Song
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, P.R. China
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24
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TET1 Knockdown Inhibits Porphyromonas gingivalis LPS/IFN-γ-Induced M1 Macrophage Polarization through the NF-κB Pathway in THP-1 Cells. Int J Mol Sci 2019; 20:ijms20082023. [PMID: 31022963 PMCID: PMC6514734 DOI: 10.3390/ijms20082023] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 04/06/2019] [Accepted: 04/22/2019] [Indexed: 12/13/2022] Open
Abstract
Tet-eleven translocation 1 (TET1) is a dioxygenase that plays an important role in decreasing the abundance of DNA methylation and changing the expression levels of specific genes related to inflammation. Porphyromonas gingivalis (Pg.) lipopolysaccharide (LPS) can induce periodontal diseases that present with severe bone loss and collagen fiber destruction accompanied by a high number of M1 macrophages. M1-polarized macrophages are pivotal immune cells that promote the progression of the periodontal inflammatory response, but the function of TET1 during M1 macrophage activation is still unknown. Our results showed that the mRNA and protein expression levels of TET1 decreased in THP-1 cells during M1 macrophage differentiation. TET1 knockdown resulted in a significant decrease in the production of proinflammatory markers such as IL-6, TNF-α, CCL2, and HLA-DR in Pg. LPS/IFN-γ- and Escherichia coli (E. coli) LPS/IFN-γ-induced M1 macrophages. Mechanistically, TET1 knockdown downregulated the activity of the NF-κB signaling pathway. After treatment with the NF-κB inhibitor BAY 11-7082, M1 marker expression showed no significant difference between the TET1 knockdown group and the control group. Taken together, these results suggest that TET1 depletion inhibited Pg. LPS/IFN-γ-induced M1 macrophage polarization through the NF-κB pathway in THP-1 cells.
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25
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MyD88 hypermethylation mediated by DNMT1 is associated with LTA-induced inflammatory response in human odontoblast-like cells. Cell Tissue Res 2019; 376:413-423. [PMID: 30707290 DOI: 10.1007/s00441-019-02993-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 01/12/2019] [Indexed: 12/22/2022]
Abstract
Dental caries is a chronic, infectious, and destructive disease that allows bacteria to break into the dental pulp tissue. As caries-related bacteria invade the human dentinal tubules, odontoblasts are the first line of dental pulp that trigger the initial inflammatory and immune responses. DNA methylation is a key epigenetic modification that plays a fundamental role in gene transcription, and its role in inflammation-related diseases has recently attracted attention. However, whether DNA methylation regulates the inflammatory response of human odontoblasts is still unknown. In the present study, we investigated the expression of DNA methyltransferase (DNMT)-1 in lipoteichoic acid (LTA)-stimulated human odontoblast-like cells (hOBs) and found that DNMT1 expression showed a decline that is contrary to the transcription of inflammatory cytokines. Knockdown of the DNMT1 gene increased the expression of several cytokines, including IL-6 and IL-8, in the LTA-induced inflammatory response. DNMT1 knockdown increased the phosphorylation of IKKα/β, IκBα, and p65 in the NF-κB pathway and the phosphorylation of p38 and ERK in the MAPK pathway; however, only the NF-κB pathway inhibitor PDTC suppressed both IL-6 and IL-8 expression, whereas inhibitors of the MAPK pathway (U0126, SB2035580, and SP600125) did not. Furthermore, DNMT1 knockdown upregulated the expression of MyD88 and TRAF6 but only attenuated the MyD88 gene promoter methylation in LTA-treated hOBs. Taken together, these results demonstrated that DNMT1 depletion caused hypomethylation and upregulation of MyD88, which resulted in activation of the NF-κB pathway and the subsequent release of LTA-induced inflammatory cytokines in hOBs. This study emphasizes the critical role of DNA methylation in the immune defense of odontoblasts when dental pulp reacted to caries.
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26
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Kirkpatrick JE, Kirkwood KL, Woster PM. Inhibition of the histone demethylase KDM4B leads to activation of KDM1A, attenuates bacterial-induced pro-inflammatory cytokine release, and reduces osteoclastogenesis. Epigenetics 2018; 13:557-572. [PMID: 29927684 PMCID: PMC6260135 DOI: 10.1080/15592294.2018.1481703] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 05/21/2018] [Indexed: 12/14/2022] Open
Abstract
Periodontal disease (PD) afflicts 46% of Americans with no effective adjunctive therapies available. While most pharmacotherapy for PD targets bacteria, the host immune response is responsible for driving tissue damage and bone loss in severe disease. Herein, we establish that the histone demethylase KDM4B is a potential drug target for the treatment of PD. Immunohistochemical staining of diseased periodontal epithelium revealed an increased abundance of KDM4B that correlates with inflammation. In murine calvarial sections exposed to Aggregatibacter actinomycetemcomitans lipopolysaccharide (Aa-LPS), immunohistochemical staining revealed a significant increase in KDM4B protein expression. The 8-hydroxyquinoline ML324 is known to inhibit the related demethylase KDM4E in vitro, but has not been evaluated against any other targets. Our studies indicate that ML324 also inhibits KDM4B (IC50: 4.9 μM), and decreases the pro-inflammatory cytokine response to an Aa-LPS challenge in vitro. Our results suggest that KDM4B inhibition-induced immunosuppression works indirectly, requiring new protein synthesis. In addition, fluorescence-stained macrophages exhibited a significant decrease in global monomethyl histone 3 lysine 4 (H3K4me) levels following an Aa-LPS challenge that was prevented by KDM4B inhibition, suggesting this effect is produced through KDM1A-mediated demethylation of H3K4. Finally, ML324 inhibition of KDM4B in osteoclast progenitors produced a significant reduction in Aa-LPS-induced osteoclastogenesis. These data link histone methylation with host immune response to bacterial pathogens in PD, and suggest a previously unreported, alternative mechanism for epigenetic control of the host inflammatory environment. As such, KDM4B represents a new therapeutic target for treating hyper-inflammatory diseases that result in bone destruction.
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Affiliation(s)
- Joy E. Kirkpatrick
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, USA
| | | | - Patrick M. Woster
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, USA
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27
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Small nucleolar RNA host gene 1: A new biomarker and therapeutic target for cancers. Pathol Res Pract 2018; 214:1247-1252. [PMID: 30107989 DOI: 10.1016/j.prp.2018.07.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/28/2018] [Accepted: 07/28/2018] [Indexed: 01/05/2023]
Abstract
OBJECTIVES Long non-coding RNAs (lncRNAs), a group of transcripts with length greater than 200 nucleotides, have been involved in multiple pathophysiological processes of the human body, especially in tumorigenesis and progression of cancers. The aberrant expression of lncRNAs processes crucial functions involved in proliferation, apoptosis and metastatic capacity of cancers. Recent studies have revealed that small nucleolar RNA host gene 1 (SNHG1), a long non-coding RNA transcribed from UHG, was located in chromosome 11. Aberrant expression of SNHG1 has been demonstrated to be associated with various sites of cancers such as glioma, esophageal cancer, gastric cancer and many others, and its deregulation could be related to survival and prognosis of cancer patients. Pertinent to clinical practice, SNHG1 might act as a prognostic biomarker for tumors and might even serve as potential target for therapy. In this review, we summarized current researches concerning the role of SNHG1 in tumor progression and discussed its mechanisms involved. MATERIALS AND METHODS In this review, we summarized and figured out recent studies concerning the expression and biological mechanisms of SNHG1in tumor development. The related studies were obtained through a systematic search of PubMed, Embase and Cochrane Library. RESULTS SNHG1 was a valuable cancer-related lncRNA that the expression level was up-regulation in a variety of malignancies, including glioma, esophageal cancer, lung cancer, gastric cancer, hepatocellular carcinoma, colorectal carcinoma, prostate cancer, cervical cancer, osteosarcoma, neuroblastoma, nasopharyngeal carcinoma. The aberrant expressions of SNHG1 have shown to contribute to proliferation, migration, and invasion of cancer cells. CONCLUSIONS SNHG1 represents promising novel biomarkers for various cancer types and have a great potential to be effectively used in clinical practice in the near future.
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Epigenetic regulation of Toll-like receptors and its roles in type 1 diabetes. J Mol Med (Berl) 2018; 96:741-751. [PMID: 30003291 DOI: 10.1007/s00109-018-1660-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 06/08/2018] [Accepted: 06/11/2018] [Indexed: 12/17/2022]
Abstract
The immune system can be divided into adaptive immunity and innate immunity. Adaptive immunity has been confirmed to be involved in the pathogenesis of autoimmune diseases, including type 1 diabetes (T1D). However, the role of innate immunity in T1D has only been studied recently. T1D is caused by selective autoimmune destruction of pancreatic islet β cells. A series of studies have suggested that TLRs play a critical role in the pathogenesis of T1D. Aberrant TLR signaling will change immune homeostasis and result in immunopathological conditions such as endotoxin shock and autoimmune responses. Thus, TLR signaling pathways are supposed to be strictly and finely regulated. Epigenetics has recently been proven to be a new regulator of TLR expression. DNA methylation, histone modification, and microRNAs are the three main epigenetic modifications. This review will mainly focus on these epigenetic mechanisms of regulation of TLRs and the role of TLRs in the pathogenesis of T1D.
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DNA methylcytosine dioxygenase ten-eleven translocation 2 enhances lipopolysaccharide-induced cytokine expression in human dental pulp cells by regulating MyD88 hydroxymethylation. Cell Tissue Res 2018; 373:477-485. [PMID: 29654353 DOI: 10.1007/s00441-018-2826-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 03/13/2018] [Indexed: 01/12/2023]
Abstract
Dental pulp inflammation is a bacterially driven inflammation process characterized by the local accumulation of cytokines/chemokines that participate in destructive processes in the pulp. Multiple mechanisms are involved in dental pulp inflammation, including epigenetic events, such as DNA methylation/demethylation. Ten-eleven translocation 2 (TET2) is a recently discovered DNA methylcytosine dioxygenase that plays important roles in inflammatory disease. However, its role in the inflammatory response of dental pulp is unknown. We observed elevated mRNA and protein levels of TET2 after lipopolysaccharide (LPS) stimulation in human dental pulp cells (hDPCs). To identify the effects of TET2 on cytokine expression, TET2 was knocked down and cytokines were detected using a cytokine antibody array after LPS stimulation. The protein expression of GM-CSF, IL-6, IL-8 and RANTES decreased in the LPS-induced hDPCs following TET2 knockdown. The downregulated expression levels of IL-6 and IL-8 were further confirmed by real-time quantitative polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA). Additionally, the phosphorylation levels of IKK-α/β, p65 and IκBα of the NF-κB signaling pathway were decreased in the TET2-silenced group. Furthermore, the global 5-hydroxymethylcytosine (5hmC) level was significantly decreased and the genomic 5-methylcytosine (5mC) level was increased in the TET2-deficient hDPCs; TET2 depletion resulted in a decrease in the 5hmC level of the MyD88 promoter following LPS stimulation. These findings indicate that TET2 knockdown inhibits LPS-induced inflammatory response in hDPCs by downregulating MyD88 hydroxymethylation. Thus, TET2-dependent DNA demethylation might play an important role in dental pulp inflammation as an epigenetic regulator.
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Florea ID, Karaoulani C. Epigenetic Changes of the Immune System with Role in Tumor Development. Methods Mol Biol 2018; 1856:203-218. [PMID: 30178253 DOI: 10.1007/978-1-4939-8751-1_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tumor development is closely related to chronic inflammation and to evasion of immune defense mechanisms by neoplastic cells. The mediators of the inflammatory process as well as proteins involved in immune response or immune response evasion can be subject to various epigenetic changes such as methylation, acetylation, or phosphorylation. Some of these, such as cytokine suppressors, are undergoing repression through epigenetic changes, and others such as cytokines or chemokines are undergoing activation through epigenetic changes, both modifications having as a result tumor progression. The activating changes can affect the receptor molecules involved in immune response and these promote inflammation and subsequently tumor development while the inactivating changes seem to be related to the tumor regression process. The proteins involved in antigen presentation, and, therefore in immune response escape, such as classical HLA proteins and related APM (antigen presentation machinery) with their epigenetic changes contribute to the tumor development process, either to tumor progression or regression, depending on the immune effector cells that are in play.
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Gu J, Liu Y, Xie B, Ye P, Huang J, Lu Z. Roles of toll-like receptors: From inflammation to lung cancer progression. Biomed Rep 2017; 8:126-132. [PMID: 29435270 PMCID: PMC5778860 DOI: 10.3892/br.2017.1034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/12/2017] [Indexed: 02/06/2023] Open
Abstract
Lung cancer is among the most common malignant tumors worldwide, and is characterized by a low survival rate compared with other cancers. Toll-like receptors (TLRs) are highly conserved in evolution and widely expressed on immune cells, where they serve an important role in the innate immune system by evoking inflammatory responses. Evasion of immune destruction is an important hallmark in the development of cancer. There is an established association between chronic inflammation and cancer, with TLRs serving important roles in the immune response against tumor cells. Recently, TLRs have been identified on tumor cells, where their activation may orchestrate the downstream signaling pathways that serve crucial functions in tumorigenesis and tumor progression. The present review summarizes the roles of TLRs as sensors on lung cancer cells that regulate lung cancer progression with regard to cell growth and invasion, angiogenesis and cancer stem cell behavior. This aimed to provide theoretical support for the development of therapies that target TLR signaling pathways for the treatment of lung cancer.
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Affiliation(s)
- Jinjing Gu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
| | - Yi Liu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
| | - Bin Xie
- School of Science, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
| | - Pingping Ye
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
| | - Jiefan Huang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
| | - Zhe Lu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310016, P.R. China
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Ding L, Jiang Q, Li G, Shen J, Du J, Lu X, Xiong X. Comprehensive assessment of association between TLR4 gene polymorphisms and cancer risk: a systematic meta-analysis. Oncotarget 2017; 8:100593-100602. [PMID: 29246004 PMCID: PMC5725046 DOI: 10.18632/oncotarget.21543] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 09/25/2017] [Indexed: 12/20/2022] Open
Abstract
Previous studies have explored the association between toll-like receptor 4 (TLR4) polymorphisms and risk of various cancers, but the results remained controversial. To obtain an assessment of the effect of TLR4 polymorphisms (rs4986790, rs4986791 and rs11536889) on cancer risk, fifty-five articles (containing 20107 cases and 28244 controls) were recruited for meta-analysis. Our result indicated that two Single Nucleotide Polymorphisms (SNP) in TLR4 were associated with decreased cancer risk for rs4986791: OR = 0.764, 95% CI: 0.652-0.894, P = 0.001 in allele model; OR = 0.769, 95%CI: 0.650-0.909, P = 0.002 in recessive model; OR = 0.505, 95% CI: 0.352-0.726, P = 0.000 in dominant model; for 11536889: OR = 0.927, 95% CI: 0.872–0.984, P = 0.013 in allele model; OR = 0.926, 95% CI: 0.862–0.944,P = 0.034 in recessive model. In terms of subgroup analyses sorted by ethnicity, only polymorphism of rs4986791 had a significant influence on decrease of cancer risk among both Caucasian and Asian populations. The findings suggested that TLR4 polymorphisms may serve as a genetic risk factor for cancers.
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Affiliation(s)
- Lu Ding
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Qifeng Jiang
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Guang Li
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Jia Shen
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Jiayin Du
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Xiaochen Lu
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
| | - Xingliang Xiong
- Department of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China
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MacDowell KS, Pinacho R, Leza JC, Costa J, Ramos B, García-Bueno B. Differential regulation of the TLR4 signalling pathway in post-mortem prefrontal cortex and cerebellum in chronic schizophrenia: Relationship with SP transcription factors. Prog Neuropsychopharmacol Biol Psychiatry 2017; 79:481-492. [PMID: 28803924 DOI: 10.1016/j.pnpbp.2017.08.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/28/2017] [Accepted: 08/06/2017] [Indexed: 12/21/2022]
Abstract
Alterations in innate immunity may underlie the pathophysiology of schizophrenia (SZ). Toll-like receptor-4 (TLR4) is a master element of innate immunity. The specificity proteins (SPs), transcription factors recently implicated in SZ, are putative regulatory agents of this. This work was aimed at describing alterations in the TLR4 signalling pathway in postmortem brain prefrontal cortex (PFC) and cerebellum (CB) of 16 chronic SZ patients and 14 controls. The possible association of TLR4 pathway with SP1 and SP4 and SZ negative symptomatology is explored. In PFC, TLR4/myeloid differentiation factor 88 (MyD88)/inhibitory subunit of nuclear factor kappa B alpha (IκBα) protein levels were lower in SZ patients, while nuclear transcription factor-κB (NFκB) activity, cyclooxygenase-2 (COX-2) expression and the lipid peroxidation index malondialdehyde (MDA) appeared increased. The pattern of changes in CB is opposite, except for COX-2 expression that remained augmented and MDA levels unaltered. Network interaction analysis showed that TLR4/MyD88/IκBα/NFκB/COX-2 pathway was coupled in PFC and uncoupled in CB. SP4 co-expressed with TLR4 and NFκB in PFC and both SP1 and SP4 co-expressed with NFκB in CB. In PFC, correlation analysis found an inverse relationship between NFκB and negative symptoms. In summary, we found brain region-specific alterations in the TLR4 signalling pathway in chronic SZ, in which SP transcription factors could participate at different levels. Further studies are required to elucidate the regulatory mechanisms of innate immunity in SZ and its relationship with symptoms.
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Affiliation(s)
- Karina S MacDowell
- Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Spain; Dept. of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, 28040 Madrid, Spain
| | - Raquel Pinacho
- Psiquiatria Molecular, Institut de Recerca Sant Joan de Déu, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
| | - Juan C Leza
- Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Spain; Dept. of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, 28040 Madrid, Spain
| | - Joan Costa
- Banc de Teixits Neurologics, Parc Sanitari Sant Joan de Déu, Sant Boi de Llobregat, 08830 Barcelona, Spain; Parc Sanitari Sant Joan de Déu, Dr. Antoni Pujadas, 42, 08830 Sant Boi de Llobregat, Spain
| | - Belén Ramos
- Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Spain; Psiquiatria Molecular, Institut de Recerca Sant Joan de Déu, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain; Parc Sanitari Sant Joan de Déu, Dr. Antoni Pujadas, 42, 08830 Sant Boi de Llobregat, Spain; Dept. de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain.
| | - Borja García-Bueno
- Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Spain; Dept. of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, 28040 Madrid, Spain.
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Yi J, Gao R, Chen Y, Yang Z, Han P, Zhang H, Dou Y, Liu W, Wang W, Du G, Xu Y, Wang J. Overexpression of NSUN2 by DNA hypomethylation is associated with metastatic progression in human breast cancer. Oncotarget 2017; 8:20751-20765. [PMID: 27447970 PMCID: PMC5400542 DOI: 10.18632/oncotarget.10612] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 06/06/2016] [Indexed: 01/29/2023] Open
Abstract
NSUN2 is a RNA methyltransferase that has been shown to be implicated in development of human cancer. However, the functional role of NSUN2, mechanism of NSUN2 overexpression and its association with clinicopathologic features in breast cancer remain unclear. To investigate alterations in the expression and functional role of NSUN2 in breast cancer, NSUN2 expression was assessed in breast cancer cells and tissues obtained from cancers at different American Joint Committee on Cancer (AJCC) stages, and its functions were investigated using breast cancer cells. NSUN2 expression was shown to be significantly higher in breast cancer cells and tissues than in normal breast epithelial cells and tissues, at both mRNA and protein levels. Overexpression of NSUN2 was shown to promote cell proliferation, migration, and invasion while NSUN2 knockdown inhibited these processes in vitro and in vivo. NSUN2 expression level was associated with the methylation level of its promoter. Our results demonstrated that the overall expression of NSUN2 significantly correlated with clinical stage (P=0.027), tumor classification (P=0.012), pathological differentiation (P=0.023), as well as with the expression levels of estrogen receptor (P<0.001), progesterone receptor (P=0.001), and Ki-67 (P<0.001). Our findings provide a unique insight into the roles and effects of NSUN2 overexpression in breast cancer cells, and highlight the necessity of the investigation of novel therapeutic targets, such as NSUN2, for the improvement of breast cancer treatments.
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Affiliation(s)
- Jie Yi
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Ran Gao
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Yu Chen
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Zhuo Yang
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Pei Han
- Department of Biochemistry and Molecular Biology, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
| | - Hui Zhang
- Department of Pathology, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Yaling Dou
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Wenjing Liu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Wengong Wang
- Department of Biochemistry and Molecular Biology, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
| | - Guanhua Du
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, People's Republic of China
| | - Yingchun Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Beijing, People's Republic of China
| | - Jinhua Wang
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, People's Republic of China
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35
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Jiang K, Zhang T, Yin N, Ma X, Zhao G, Wu H, Qiu C, Deng G. Geraniol alleviates LPS-induced acute lung injury in mice via inhibiting inflammation and apoptosis. Oncotarget 2017; 8:71038-71053. [PMID: 29050341 PMCID: PMC5642616 DOI: 10.18632/oncotarget.20298] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 07/19/2017] [Indexed: 12/28/2022] Open
Abstract
Geraniol (GOH), a special type of acyclic monoterpene alcohol, has been widely used to treat many diseases associated with inflammation and apoptosis. Acute lung injury (ALI) is a common clinical disease in humans characterized by pulmonary inflammation and apoptosis. In the present study, we investigated the protective effects of GOH in a mouse model of ALI induced by the intranasal administration of lipopolysaccharide (LPS) and elucidated the underlying molecular mechanisms in RAW 264.7 cells. In vivo, GOH treatment markedly ameliorated pathological injury and pulmonary cell apoptosis and reduced the wet/dry (W/D) weight ratio of lungs, myeloperoxidase (MPO) activity and the production of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α). In vitro, the levels of pro-inflammatory cytokines, iNOS and COX-2 were significantly increased in LPS-stimulated RAW 264.7 cells, an effect that was decreased by GOH treatment. Moreover, GOH treatment dramatically reduced the expression of Toll-like receptor 4 (TLR4) and then prevented the nuclear factor-κB (NF-κB) activation. GOH treatment also promoted anti-apoptotic Bcl-2 expression and inhibited pro-apoptotic Bax and Caspase-3 expression. Furthermore, knockdown of TLR4 expression exerted a similar effect and inhibited the phosphorylation of p65, as well as the Bax and Caspase-3 expression. Taken together, these results suggest that GOH treatment alleviates LPS-induced ALI via inhibiting pulmonary inflammation and apoptosis, a finding that might be associated with the inhibition of TLR4-mediated NF-κB and Bcl-2/Bax signalling pathways.
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Affiliation(s)
- Kangfeng Jiang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Tao Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Nannan Yin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Xiaofei Ma
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Gan Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Haichong Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Changwei Qiu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
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Mazzone R, Zwergel C, Mai A, Valente S. Epi-drugs in combination with immunotherapy: a new avenue to improve anticancer efficacy. Clin Epigenetics 2017; 9:59. [PMID: 28572863 PMCID: PMC5450222 DOI: 10.1186/s13148-017-0358-y] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 05/19/2017] [Indexed: 12/13/2022] Open
Abstract
Immune checkpoint factors, such as programmed cell death protein-1/2 (PD-1, PD-2) or cytotoxic T lymphocyte-associated antigen-4 (CTLA-4) receptors, are targets for monoclonal antibodies (MAbs) developed for cancer immunotherapy. Indeed, modulating immune inhibitory pathways has been considered an important breakthrough in cancer treatment. Although immune checkpoint blockade therapy used to treat malignant diseases has provided promising results, both solid and haematological malignancies develop mechanisms that enable themselves to evade the host immune system. To overcome some major limitations and ensure safety in patients, recent strategies have shown that combining epigenetic modulators, such as inhibitors of histone deacetylases (HDACi) or DNA methyltransferases (DNMTi), with immunotherapeutics can be useful. Preclinical data generated using mouse models strongly support the feasibility and effectiveness of the proposed approaches. Indeed, co-treatment with pan- or class I-selective HDACi or DNMTi improved beneficial outcomes in both in vitro and in vivo studies. Based on the evidence of a pivotal role for HDACi and DNMTi in modulating various components belonging to the immune system, recent clinical trials have shown that both HDACi and DNMTi strongly augmented response to anti-PD-1 immunotherapy in different tumour types. This review describes the current strategies to increase immunotherapy responses, the effects of HDACi and DNMTi on immune modulation, and the advantages of combinatorial therapy over single-drug treatment.
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Affiliation(s)
- Roberta Mazzone
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy.,Center for Life Nano Science@Sapienza, Italian Institute of Technology, Viale Regina Elena 291, 00161 Rome, Italy
| | - Clemens Zwergel
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Antonello Mai
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy.,Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Sergio Valente
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
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Song Y, Wang Y, Tong C, Xi H, Zhao X, Wang Y, Chen L. A unified model of the hierarchical and stochastic theories of gastric cancer. Br J Cancer 2017; 116:973-989. [PMID: 28301871 PMCID: PMC5396111 DOI: 10.1038/bjc.2017.54] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 01/16/2017] [Accepted: 01/26/2017] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer (GC) is a life-threatening disease worldwide. Despite remarkable advances in treatments for GC, it is still fatal to many patients due to cancer progression, recurrence and metastasis. Regarding the development of novel therapeutic techniques, many studies have focused on the biological mechanisms that initiate tumours and cause treatment resistance. Tumours have traditionally been considered to result from somatic mutations, either via clonal evolution or through a stochastic model. However, emerging evidence has characterised tumours using a hierarchical organisational structure, with cancer stem cells (CSCs) at the apex. Both stochastic and hierarchical models are reasonable systems that have been hypothesised to describe tumour heterogeneity. Although each model alone inadequately explains tumour diversity, the two models can be integrated to provide a more comprehensive explanation. In this review, we discuss existing evidence supporting a unified model of gastric CSCs, including the regulatory mechanisms of this unified model in addition to the current status of stemness-related targeted therapy in GC patients.
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Affiliation(s)
- Yanjing Song
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Yao Wang
- Department of Immunology, Institute of Basic Medicine, School of Life Sciences, Chinese PLA General Hospital, Beijing 100853, China
| | - Chuan Tong
- Department of Immunology, Institute of Basic Medicine, School of Life Sciences, Chinese PLA General Hospital, Beijing 100853, China
| | - Hongqing Xi
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Xudong Zhao
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Yi Wang
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Lin Chen
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
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38
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Sokolova O, Naumann M. NF-κB Signaling in Gastric Cancer. Toxins (Basel) 2017; 9:toxins9040119. [PMID: 28350359 PMCID: PMC5408193 DOI: 10.3390/toxins9040119] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/14/2017] [Accepted: 03/22/2017] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer is a leading cause of cancer death worldwide. Diet, obesity, smoking and chronic infections, especially with Helicobacter pylori, contribute to stomach cancer development. H. pylori possesses a variety of virulence factors including encoded factors from the cytotoxin-associated gene pathogenicity island (cagPAI) or vacuolating cytotoxin A (VacA). Most of the cagPAI-encoded products form a type 4 secretion system (T4SS), a pilus-like macromolecular transporter, which translocates CagA into the cytoplasm of the host cell. Only H. pylori strains carrying the cagPAI induce the transcription factor NF-κB, but CagA and VacA are dispensable for direct NF-κB activation. NF-κB-driven gene products include cytokines/chemokines, growth factors, anti-apoptotic factors, angiogenesis regulators and metalloproteinases. Many of the genes transcribed by NF-κB promote gastric carcinogenesis. Since it has been shown that chemotherapy-caused cellular stress could elicit activation of the survival factor NF-κB, which leads to acquisition of chemoresistance, the NF-κB system is recommended for therapeutic targeting. Research is motivated for further search of predisposing conditions, diagnostic markers and efficient drugs to improve significantly the overall survival of patients. In this review, we provide an overview about mechanisms and consequences of NF-κB activation in gastric mucosa in order to understand the role of NF-κB in gastric carcinogenesis.
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Affiliation(s)
- Olga Sokolova
- Institute of Experimental Internal Medicine, Otto von Guericke University Magdeburg, Magdeburg 39120, Germany.
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Otto von Guericke University Magdeburg, Magdeburg 39120, Germany.
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Peralta-Arrieta I, Hernández-Sotelo D, Castro-Coronel Y, Leyva-Vázquez MA, Illades-Aguiar B. DNMT3B modulates the expression of cancer-related genes and downregulates the expression of the gene VAV3 via methylation. Am J Cancer Res 2017; 7:77-87. [PMID: 28123849 PMCID: PMC5250682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 09/02/2016] [Indexed: 06/06/2023] Open
Abstract
Altered promoter DNA methylation is one of the most important epigenetic abnormalities in human cancer. DNMT3B, de novo methyltransferase, is clearly related to abnormal methylation of tumour suppressor genes, DNA repair genes and its overexpression contributes to oncogenic processes and tumorigenesis in vivo. The purpose of this study was to assess the effect of the overexpression of DNMT3B in HaCaT cells on global gene expression and on the methylation of selected genes to the identification of genes that can be target of DNMT3B. We found that the overexpression of DNMT3B in HaCaT cells, modulate the expression of genes related to cancer, downregulated the expression of 151 genes with CpG islands and downregulated the expression of the VAV3 gene via methylation of its promoter. These results highlight the importance of DNMT3B in gene expression and human cancer.
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Affiliation(s)
- Irlanda Peralta-Arrieta
- Laboratorio de Biomedicina Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de GuerreroChilpancingo, Guerrero, México
| | - Daniel Hernández-Sotelo
- Laboratorio de Epigenética del Cáncer, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de GuerreroChilpancingo, Guerrero, México
| | - Yaneth Castro-Coronel
- Laboratorio de Investigación en Citopatología e Histoquímica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de GuerreroChilpancingo, Guerrero, México
| | - Marco Antonio Leyva-Vázquez
- Laboratorio de Biomedicina Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de GuerreroChilpancingo, Guerrero, México
| | - Berenice Illades-Aguiar
- Laboratorio de Biomedicina Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de GuerreroChilpancingo, Guerrero, México
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Cantone L, Iodice S, Tarantini L, Albetti B, Restelli I, Vigna L, Bonzini M, Pesatori AC, Bollati V. Particulate matter exposure is associated with inflammatory gene methylation in obese subjects. ENVIRONMENTAL RESEARCH 2017; 152:478-484. [PMID: 27838013 PMCID: PMC5250798 DOI: 10.1016/j.envres.2016.11.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/14/2016] [Accepted: 11/02/2016] [Indexed: 05/22/2023]
Abstract
BACKGROUND Overweight and obesity are becoming more widespread with alarming projections for the coming years. Obesity may increase susceptibility to the adverse effects of PM exposure, exacerbating the effects on cardiovascular diseases and altering the biomarkers of vascular inflammation. The associated biological mechanisms have not been fully understood yet; the common denominator in the pathogenesis of the co-morbidities of obesity is the presence of an active, low-grade inflammatory process. DNA methylation has been shown to regulate inflammatory pathways that are responsible for the development of cardiovascular diseases. OBJECTIVES The aim of the study was to investigate, in a population of overweight/obese subjects, the effects of PM on blood DNA methylation in genes associated to inflammatory response. METHODS Using bisulfite pyrosequencing, we measured DNA methylation in peripheral blood mononuclear cells from 186 overweighted/obese subjects. In particular, we quantified DNA methylation in a set of 3 candidate genes, including CD14, TLR4 and TNF-α, because of the important roles that these genes play in the inflammatory pathway. Personal exposure to PM10 was estimated for each subject based on the local PM10 concentrations, measured by monitoring stations at residential address. Repeated measure models were used to evaluate the association of PM10 with each genes, accounting for possible correlations among the genes that regulate the same inflammatory pathway. RESULTS We found an inverse association between the daily PM10 exposure and the DNA methylation of inflammatory genes, measured in peripheral blood of healthy overweight/obese subjects. Considering different exposure time-windows, the effect on CD14 and TLR4 methylation was observed, respectively, in days 4-5-6, and days 6-7-8. TNF-α methylation was not associated to PM10. CONCLUSIONS Our findings support a picture in which PM10 exposure and transcriptional regulation of inflammatory gene pathway in obese subjects are associated.
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Affiliation(s)
- Laura Cantone
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy.
| | - Simona Iodice
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Letizia Tarantini
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Benedetta Albetti
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Ilaria Restelli
- Department of Preventive Medicine, UOC Protezione e Promozione Salute Lavoratori Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Luisella Vigna
- Department of Preventive Medicine, UOC Protezione e Promozione Salute Lavoratori Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Matteo Bonzini
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Department of Preventive Medicine, UOC Protezione e Promozione Salute Lavoratori Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Angela Cecilia Pesatori
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Epidemiology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Valentina Bollati
- EPIGET - Epidemiology, Epigenetics and Toxicology Lab., Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Epidemiology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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Ji YL, Zhu JH, Yang JY. miR-409-3b inhibits invasion and metastasis of gastric cancer by downregulating EGFL7 protein expression. Shijie Huaren Xiaohua Zazhi 2016; 24:866-872. [DOI: 10.11569/wcjd.v24.i6.866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the inhibitory effect of miR-409-3b on the invasion and migration of gastric adenocarcinoma and the underlying molecular mechanisms.
METHODS: MicroRNA array was used to screen miRNAs which were significantly differentially expressed between gastric cancer and paracancerous tissue. Bioinformatics was employed to predict the miRNAs related to the regulation of epidermal growth factor-like domain-containing protein 7 (EGFL7). Gastric cancer cells were infected with lentiviral vectors or transfected with miR-409-3b mimics to overexpress miR-409-3b. Western blot was used to detect the changes of EGFL7 in gastric cancer cells. Transwell invasion assay was accomplished to analyze cell invasion ability. Quantitative real-time polymerase chain reaction (qRT-PCR) was adopted to detect the expression of miR-409-3b in 80 pairs of gastric cancer tissues and adjacent noncancerous tissues. The relationship between clinical pathological data and EGFL7 expression was analyzed.
RESULTS: MicroRNA array and bioinformatics prediction results supported that miR-409-3b was lowly expressed in gastric carcinoma, and regulated EGFL7. Dual luciferase assay confirmed that miR-409-3b binds to EGFL7. Western blot analysis suggested that EGFL7 was downregulated after miR-409-3b overexpression. qRT-PCR suggested that the relative expression of miR-409-3b in gastric cancer tissues was lower than that in the adjacent noncancerous tissues. Transwell invasion experiments showed that miR-409-3b infection could significantly reduce the invasion ability of gastric cancer cells in vitro. The migration ability of miR-409-3b LV-cells was significantly higher than that of BGC-823 cells. The expression of miR-409-3b was closely related with lymph node metastasis (P < 0.05). The expression ratio of miR-409-3b in gastric cancer tissues to adjacent noncancerous tissues was significantly lower in tissues collected from patients with distant metastasis than in those from patients without distant metastasis (P < 0.05).
CONCLUSION: miR-409-3b regulates EGFL7 expression at the post-transcriptional level, and then suppresses the invasion and metastasis of gastric adenocarcinoma.
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