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Xuan X, Zhang Y, Song Y, Zhang B, Liu J, Liu D, Lu S. Role of protein arginine methyltransferase 1 in obesity-related metabolic disorders: Research progress and implications. Diabetes Obes Metab 2024; 26:3491-3500. [PMID: 38747214 DOI: 10.1111/dom.15640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 08/06/2024]
Abstract
Obesity has become a major global problem that significantly confers an increased risk of developing life-threatening complications, including type 2 diabetes mellitus, fatty liver disease and cardiovascular diseases. Protein arginine methyltransferases (PRMTs) are enzymes that catalyse the methylation of target proteins. They are ubiquitous in eukaryotes and regulate transcription, splicing, cell metabolism and RNA biology. As a key, epigenetically modified enzyme, protein arginine methyltransferase 1 (PRMT1) is involved in obesity-related metabolic processes, such as lipid metabolism, the insulin signalling pathway, energy balance and inflammation, and plays an important role in the pathology of obesity-related metabolic disorders. This review summarizes recent research on the role of PRMT1 in obesity-related metabolic disorders. The primary objective was to comprehensively elucidate the functional role and regulatory mechanisms of PRMT1. Moreover, this study attempts to review the pathogenesis of PRMT1-mediated obesity-related metabolic disorders, thereby offering pivotal information for further studies and clinical treatment.
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Affiliation(s)
- Xiaolei Xuan
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Yongjiao Zhang
- School of Medical Laboratory, Shandong Second Medical University, Weifang, China
| | - Yufan Song
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Bingyang Zhang
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Junjun Liu
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Dong Liu
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Sumei Lu
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
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2
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Zhang Y, Wei S, Jin EJ, Jo Y, Oh CM, Bae GU, Kang JS, Ryu D. Protein Arginine Methyltransferases: Emerging Targets in Cardiovascular and Metabolic Disease. Diabetes Metab J 2024; 48:487-502. [PMID: 39043443 PMCID: PMC11307121 DOI: 10.4093/dmj.2023.0362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 06/17/2024] [Indexed: 07/25/2024] Open
Abstract
Cardiovascular diseases (CVDs) and metabolic disorders stand as formidable challenges that significantly impact the clinical outcomes and living quality for afflicted individuals. An intricate comprehension of the underlying mechanisms is paramount for the development of efficacious therapeutic strategies. Protein arginine methyltransferases (PRMTs), a class of enzymes responsible for the precise regulation of protein methylation, have ascended to pivotal roles and emerged as crucial regulators within the intrinsic pathophysiology of these diseases. Herein, we review recent advancements in research elucidating on the multifaceted involvements of PRMTs in cardiovascular system and metabolic diseases, contributing significantly to deepen our understanding of the pathogenesis and progression of these maladies. In addition, this review provides a comprehensive analysis to unveil the distinctive roles of PRMTs across diverse cell types implicated in cardiovascular and metabolic disorders, which holds great potential to reveal novel therapeutic interventions targeting PRMTs, thus presenting promising perspectives to effectively address the substantial global burden imposed by CVDs and metabolic disorders.
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Affiliation(s)
- Yan Zhang
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, Korea
| | - Shibo Wei
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Eun-Ju Jin
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Yunju Jo
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Chang-Myung Oh
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Gyu-Un Bae
- Muscle Physiome Institute, College of Pharmacy, Sookmyung Women’s University, Seoul, Korea
- Research Institute of Aging-Related Diseases, AniMusCure Inc., Suwon, Korea
| | - Jong-Sun Kang
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, Korea
- Research Institute of Aging-Related Diseases, AniMusCure Inc., Suwon, Korea
| | - Dongryeol Ryu
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
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Muscò A, Martini D, Digregorio M, Broccoli V, Andreazzoli M. Shedding a Light on Dark Genes: A Comparative Expression Study of PRR12 Orthologues during Zebrafish Development. Genes (Basel) 2024; 15:492. [PMID: 38674426 PMCID: PMC11050278 DOI: 10.3390/genes15040492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 04/06/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Haploinsufficiency of the PRR12 gene is implicated in a human neuro-ocular syndrome. Although identified as a nuclear protein highly expressed in the embryonic mouse brain, PRR12 molecular function remains elusive. This study explores the spatio-temporal expression of zebrafish PRR12 co-orthologs, prr12a and prr12b, as a first step to elucidate their function. In silico analysis reveals high evolutionary conservation in the DNA-interacting domains for both orthologs, with significant syntenic conservation observed for the prr12b locus. In situ hybridization and RT-qPCR analyses on zebrafish embryos and larvae reveal distinct expression patterns: prr12a is expressed early in zygotic development, mainly in the central nervous system, while prr12b expression initiates during gastrulation, localizing later to dopaminergic telencephalic and diencephalic cell clusters. Both transcripts are enriched in the ganglion cell and inner neural layers of the 72 hpf retina, with prr12b widely distributed in the ciliary marginal zone. In the adult brain, prr12a and prr12b are found in the cerebellum, amygdala and ventral telencephalon, which represent the main areas affected in autistic patients. Overall, this study suggests PRR12's potential involvement in eye and brain development, laying the groundwork for further investigations into PRR12-related neurobehavioral disorders.
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Affiliation(s)
- Alessia Muscò
- Cell and Developmental Biology Unit, University of Pisa, 56126 Pisa, Italy (D.M.)
| | - Davide Martini
- Cell and Developmental Biology Unit, University of Pisa, 56126 Pisa, Italy (D.M.)
| | - Matteo Digregorio
- Cell and Developmental Biology Unit, University of Pisa, 56126 Pisa, Italy (D.M.)
| | - Vania Broccoli
- Stem Cell and Neurogenesis Unit, Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
- CNR Institute of Neuroscience, 20132 Milan, Italy
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Yu W, Yang B, Xu S, Gao Y, Huang Y, Wang Z. Diabetic Retinopathy and Cardiovascular Disease: A Literature Review. Diabetes Metab Syndr Obes 2023; 16:4247-4261. [PMID: 38164419 PMCID: PMC10758178 DOI: 10.2147/dmso.s438111] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024] Open
Abstract
Diabetic complications can be divided into macrovascular complications such as cardiovascular disease and cerebrovascular disease and microvascular complications such as diabetic retinopathy, diabetic nephropathy and diabetic neuropathy. Among them, cardiovascular disease (CVD) is an important cause of death in diabetic patients. Diabetes retinopathy (DR) is one of the main reasons for the increasing disability rate of diabetes. In recent years, some studies have found that because DR and CVD have a common pathophysiological basis, the occurrence of DR and CVD are inseparable, and to a certain extent, DR can predict the occurrence of CVD. With the development of technology, the fundus parameters of DR can be quantitatively analyzed as an independent risk factor of CVD. In addition, the cytokines related to DR can also be used for early screening of DR. Although many advances have been made in the treatment of CVD, its situation of prevention and treatment is still not optimistic. This review hopes to discuss the feasibility of DR in predicting CVD from the common pathophysiological mechanism of DR and CVD, the new progress of diagnostic techniques for DR, and the biomarkers for early screening of DR.
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Affiliation(s)
- Wenhua Yu
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
| | - Bo Yang
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
| | - Siting Xu
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yun Gao
- Department of Pathology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yan Huang
- Department of Ophthalmology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
| | - Zhongqun Wang
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, People’s Republic of China
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Liu J, Yan Y, Zheng D, Zhang J, Wang J. Inhibiting microRNA-200a-3p attenuates pyroptosis via targeting the SIRT1/NF-κB/NLRP3 pathway in H 2O 2-induced HAEC. Aging (Albany NY) 2023; 15:11184-11200. [PMID: 37874693 PMCID: PMC10637806 DOI: 10.18632/aging.205121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 09/26/2023] [Indexed: 10/26/2023]
Abstract
Atherosclerosis is a chronic inflammatory disease of the arterial wall caused by many factors. Endothelial cell dysfunction is the initial factor in the development of atherosclerosis, and ROS activates the assembly of inflammasomes and induces the pyroptosis of vascular endothelial cells. Whether H2O2 induced human aortic endothelial cells (HAECs) pyroptosis and the underlying mechanisms remain unclear. This study aimed to investigate the role of microRNA-200a-3p in H2O2-induced HAECs pyroptosis. First, we found that the pyroptosis-related protein was upregulated in aortia in HFD apoE-/- mice. The in vitro study showed that the activation of NLRP3 inflammasomes and the pyroptosis in H2O2-induced HAECs, which is characterized by an increase in Lactate dehydrogenase (LDH) activity, and an increase in propidium iodide (PI)-positive cells. The expression of silent information regulator of transcription 1 (SIRT1) was also decreased in H2O2-induced HAECs, and the overexpression of SIRT1 could reverse the occurrence of pyroptosis, partly through p65 deacetylation, thereby inhibiting nuclear translocation of p65 and regulating NLRP3 expression. Further studies revealed increased miRNA-200a-3p expression in H2O2-induced HAECs and the promotion of pyroptosis, which was achieved by targeting SIRT1. Inhibition of miR-200a-3p reduced pyroptosis by promoting the expression of the downstream target gene SIRT1 and reducing the accumulation of p65 and NLRP3. Collectively, our results suggest that H2O2 can regulate NLRP3 inflammasomes through the miR-200a-3p/SIRT1/NF-κB (p65) signaling pathway and promote HAEC pyroptosis. The miR-200a-3p inhibitor can promote the expression of SIRT1 and inhibit pyroptosis, which may be important to prevent and treat atherosclerosis.
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Affiliation(s)
- Jia Liu
- Department of Cardiology, Second Affiliated Hospital of Jilin University, Changchun 130022, China
| | - Youyou Yan
- Department of Cardiology, Second Affiliated Hospital of Jilin University, Changchun 130022, China
| | - Dongdong Zheng
- Department of Cardiovascular Surgery, Second Affiliated Hospital of Jilin University, Changchun 130022, China
| | - Jifeng Zhang
- Pharmaceutical Sciences of Jilin University, Changchun 130021, China
| | - Junnan Wang
- Department of Cardiology, Second Affiliated Hospital of Jilin University, Changchun 130022, China
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Angelopoulou E, Pyrgelis ES, Ahire C, Suman P, Mishra A, Piperi C. Functional Implications of Protein Arginine Methyltransferases (PRMTs) in Neurodegenerative Diseases. BIOLOGY 2023; 12:1257. [PMID: 37759656 PMCID: PMC10525691 DOI: 10.3390/biology12091257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/13/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
During the aging of the global population, the prevalence of neurodegenerative diseases will be continuously growing. Although each disorder is characterized by disease-specific protein accumulations, several common pathophysiological mechanisms encompassing both genetic and environmental factors have been detected. Among them, protein arginine methyltransferases (PRMTs), which catalyze the methylation of arginine of various substrates, have been revealed to regulate several cellular mechanisms, including neuronal cell survival and excitability, axonal transport, synaptic maturation, and myelination. Emerging evidence highlights their critical involvement in the pathophysiology of neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), frontotemporal dementia-amyotrophic lateral sclerosis (FTD-ALS) spectrum, Huntington's disease (HD), spinal muscular atrophy (SMA) and spinal and bulbar muscular atrophy (SBMA). Underlying mechanisms include the regulation of gene transcription and RNA splicing, as well as their implication in various signaling pathways related to oxidative stress responses, apoptosis, neuroinflammation, vacuole degeneration, abnormal protein accumulation and neurotransmission. The targeting of PRMTs is a therapeutic approach initially developed against various forms of cancer but currently presents a novel potential strategy for neurodegenerative diseases. In this review, we discuss the accumulating evidence on the role of PRMTs in the pathophysiology of neurodegenerative diseases, enlightening their pathogenesis and stimulating future research.
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Affiliation(s)
- Efthalia Angelopoulou
- 1st Department of Neurology, Medical School, National and Kapodistrian University of Athens, Eginition Hospital, 11528 Athens, Greece; (E.A.); (E.-S.P.)
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Efstratios-Stylianos Pyrgelis
- 1st Department of Neurology, Medical School, National and Kapodistrian University of Athens, Eginition Hospital, 11528 Athens, Greece; (E.A.); (E.-S.P.)
| | - Chetana Ahire
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, Kamrup 781101, Assam, India; (C.A.); (P.S.)
| | - Prachi Suman
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, Kamrup 781101, Assam, India; (C.A.); (P.S.)
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, Kamrup 781101, Assam, India; (C.A.); (P.S.)
| | - Christina Piperi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
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7
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Wang Y, Yan S, Liu X, Deng F, Wang P, Yang L, Hu L, Huang K, He J. PRMT4 promotes ferroptosis to aggravate doxorubicin-induced cardiomyopathy via inhibition of the Nrf2/GPX4 pathway. Cell Death Differ 2022; 29:1982-1995. [PMID: 35383293 PMCID: PMC9525272 DOI: 10.1038/s41418-022-00990-5] [Citation(s) in RCA: 103] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 12/15/2022] Open
Abstract
Doxorubicin (DOX), a commonly used antitumor agent, is often accompanied by its dosage-dependent cardiotoxicity, which incorporates ferroptosis in its pathogenesis. Protein arginine methyltransferase 4 (PRMT4) is a transcription regulator involved in the modulation of oxidative stress and autophagy, but its role in DOX-induced cardiomyopathy (DIC) and ferroptosis remains elusive. Herein, we aimed to investigate the involvement and the underlying mechanisms of PRMT4 in the pathogenesis of DIC. Our present study revealed that the expression level of PRMT4 was markedly decreased in DOX-treated cardiomyocytes. Interestingly, it is noted that PRMT4 overexpression accelerated ferroptosis to aggravate DIC, while its gene disruption or pharmaceutical inhibition exhibited the opposite effect. Mechanistically, our observation demonstrated that PRMT4 interacted with the nuclear factor erythroid 2-related factor 2 (Nrf2) to promote its enzymatic methylation, which restricted the nuclear translocation of Nrf2 and subsequently suppressed the transcription of glutathione peroxidase 4 (GPX4). Importantly, the detrimental role of PRMT4 in DOX-induced cardiomyocyte ferroptosis was abolished by Nrf2 activation or Fer-1 administration. Collectively, our data reveal that PRMT4 inhibits Nrf2/GPX4 signaling to accelerate ferroptosis in DIC, suggesting that targeting PRMT4 may present as a potential preventive strategy against the development of DIC.
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Affiliation(s)
- Yilong Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shu Yan
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
- Heart Center and Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xuemei Liu
- Department of functional medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China
| | - Fei Deng
- Department of Urology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Pengchao Wang
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liuye Yang
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lizhi Hu
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kai Huang
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Jiangui He
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
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Barnstable CJ. Epigenetics and Degenerative Retinal Diseases: Prospects for New Therapeutic Approaches. Asia Pac J Ophthalmol (Phila) 2022; 11:328-334. [PMID: 36041147 DOI: 10.1097/apo.0000000000000520] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/08/2022] [Indexed: 12/26/2022] Open
Abstract
ABSTRACT There is growing evidence that retinal degenerative diseases are accompanied by epigenetic changes in both deoxyribonucleic acid methylation and histone modification. Even in the monogenic disease retinitis pigmentosa, there is a cascade of changes in gene expression that correlate with epigenetic changes, suggesting that many of the symptoms, and degenerative changes, may be a result of epigenetic changes downstream from the genetic mutation. This is supported by data from studies of diabetic retinopathy and macular degeneration, 2 diseases where it has been difficult to define a single causative change. Initial studies with modifiers of deoxyribonucleic acid methylation suggest that they can provide therapeutic benefit. A number of drugs are available to inhibit specific epigenetic histone modifier enzymes, and these offer the possibility of new therapeutic approaches to retinal disease. Systemic treatment with inhibitors of histone demethylases and histone deacetylases have arrested rod degeneration in rodent models of retinitis pigmentosa. Some evidence has suggested that similar treatments may provide benefits for patients with diabetic retinopathy. Because differentiation of retinal stem cells is regulated in part by epigenetic mechanisms, it may also be possible to direct stem cell differentiation pathways through the use of selective epigenetic modifiers. This is predicted to provide a valuable avenue to accelerate the introduction of regenerative approaches to retinal disease. Epigenetic modifiers are poised to become a powerful new approach to treat retinal degenerative diseases.
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Affiliation(s)
- Colin J Barnstable
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, PA, US
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Lee EJ, Won JP, Lee HG, Kim E, Hur J, Lee WJ, Hwang JS, Seo HG. PPARδ Inhibits Hyperglycemia-Triggered Senescence of Retinal Pigment Epithelial Cells by Upregulating SIRT1. Antioxidants (Basel) 2022; 11:antiox11061207. [PMID: 35740104 PMCID: PMC9219651 DOI: 10.3390/antiox11061207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 02/04/2023] Open
Abstract
Emerging evidence shows that peroxisome proliferator-activated receptor delta (PPARδ) plays a pivotal role in cellular aging. However, its function in retinal disease processes such as hyperglycemia-associated diabetic retinopathy is unclear. Here, we demonstrate that PPARδ inhibits premature senescence of retinal pigment epithelial (RPE) cells induced by high glucose (HG) through SIRT1 upregulation. A specific ligand GW501516-activation of PPARδ suppressed premature senescence and production of reactive oxygen species induced by HG in ARPE-19 cells, a spontaneously arising human RPE cell line. These effects were accompanied by the regulation of the premature senescence-associated genes p53, p21, and SMP-30. Furthermore, GW501516-activated PPARδ almost completely abolished the effects of HG treatment on the formation of phosphorylated H2A histone family member X (γ-H2A.X) foci, a molecular marker of aging. These inhibitory effects of GW501516 were significantly reversed in ARPE-19 cells stably expressing small hairpin RNA targeting PPARδ. Notably, GW501516 significantly increased the mRNA and protein levels of SIRT1, indicating that GW501516-activated PPARδ exerted its beneficial effects through SIRT1. In addition, GW501516 restored HG-suppressed SIRT1 expression, corroborating the role of SIRT1 in the anti-senescence function of PPARδ. The effects of PPARδ on HG-induced premature senescence and the expression of the senescence-associated genes p53, p21, and SMP-30 were mimicked by the SIRT1 activator resveratrol, but blocked by the SIRT1 inhibitor sirtinol. Collectively, these results indicate that GW501516-activated PPARδ inhibits HG-triggered premature senescence of RPE cells by modulating SIRT1 signaling.
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Taurone S, De Ponte C, Rotili D, De Santis E, Mai A, Fiorentino F, Scarpa S, Artico M, Micera A. Biochemical Functions and Clinical Characterizations of the Sirtuins in Diabetes-Induced Retinal Pathologies. Int J Mol Sci 2022; 23:ijms23074048. [PMID: 35409409 PMCID: PMC8999941 DOI: 10.3390/ijms23074048] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/23/2022] [Accepted: 04/04/2022] [Indexed: 12/21/2022] Open
Abstract
Diabetic retinopathy (DR) is undoubtedly one of the most prominent causes of blindness worldwide. This pathology is the most frequent microvascular complication arising from diabetes, and its incidence is increasing at a constant pace. To date, the insurgence of DR is thought to be the consequence of the intricate complex of relations connecting inflammation, the generation of free oxygen species, and the consequent oxidative stress determined by protracted hyperglycemia. The sirtuin (SIRT) family comprises 7 histone and non-histone protein deacetylases and mono (ADP-ribosyl) transferases regulating different processes, including metabolism, senescence, DNA maintenance, and cell cycle regulation. These enzymes are involved in the development of various diseases such as neurodegeneration, cardiovascular pathologies, metabolic disorders, and cancer. SIRT1, 3, 5, and 6 are key enzymes in DR since they modulate glucose metabolism, insulin sensitivity, and inflammation. Currently, indirect and direct activators of SIRTs (such as antagomir, glycyrrhizin, and resveratrol) are being developed to modulate the inflammation response arising during DR. In this review, we aim to illustrate the most important inflammatory and metabolic pathways connecting SIRT activity to DR, and to describe the most relevant SIRT activators that might be proposed as new therapeutics to treat DR.
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Affiliation(s)
- Samanta Taurone
- IRCCS—Fondazione Bietti, via Livenza 3, 00198 Rome, Italy;
- Correspondence: ; Tel.: +39-06-85-356-727; Fax: +39-06-84-242-333
| | - Chiara De Ponte
- Department of Sensory Organs, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (C.D.P.); (M.A.)
| | - Dante Rotili
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (D.R.); (A.M.); (F.F.)
| | - Elena De Santis
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Antonello Mai
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (D.R.); (A.M.); (F.F.)
| | - Francesco Fiorentino
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (D.R.); (A.M.); (F.F.)
| | - Susanna Scarpa
- Experimental Medicine Department, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy;
| | - Marco Artico
- Department of Sensory Organs, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (C.D.P.); (M.A.)
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11
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Tang X, Li X, Zhang D, Han W. Astragaloside-IV alleviates high glucose-induced ferroptosis in retinal pigment epithelial cells by disrupting the expression of miR-138-5p/Sirt1/Nrf2. Bioengineered 2022; 13:8240-8254. [PMID: 35302431 PMCID: PMC9162003 DOI: 10.1080/21655979.2022.2049471] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Astragaloside-IV (AS-IV) (C41H68O14) is a high-purity natural product extracted from Astragalus, which has demonstrated biological activities. However, the effect of AS-IV on retinal pigment epithelial (RPE) cells in diabetic retinopathy (DR) remains unclear. In this study, high glucose (HG) was shown to promote ARPE-19 RPE cell death, increase the contents of reactive oxygen species (ROS) and oxidized glutathione (GSSG), and enhance lipid peroxidation density of mitochondrial membrane. In contrast, AS-IV decreased glutathione (GSH) content, mitochondria size and ridge. Addition of iron death inhibitor Ferrostatin-1 (Fer-1) to RPE cells decreased cell dead rate, thus indicating that HG-induced mitochondrial damage occurred due to ferroptosis. AS-IV alleviated HG-induced RPE cell damage. Furthermore, HG decreased levels of silent information regulator 1 (Sirt1) and nuclear factor (erythroid-derived 2)-like 2 (Nrf2) in the nucleus of RPE cells; AS-IV could alleviate these effects and increased expression of glutathione peroxidase 4 (GPX4), glutamate cysteine ligase (GCLM) and glutamate cysteine ligase catalytic subunit (GCLC), which are Nrf2 downstream genes. Mechanistically, AS-IV was shown to alleviate the effects of HG by increasing mir-138-5p expression in RPE cells and promoting expression of Sirt1 and Nrf2 in the nucleus. Transfection of mir-138-5p agonist inhibited the regulatory effects of AS-IV on Sirt1 and Nrf2, accompanied by decreased GPX4, GCLM and GCLC levels, and restoration of ferroptosis-related changes. Collectively, HG increased ferroptosis rate in RPE cells. In addition, AS-IV inhibited miR-138-5p expression, subsequently increasing Sirt1/Nrf2 activity and cellular antioxidant capacity to alleviate ferroptosis, resulting decreased cell death, which potentially inhibits the DR pathological process.
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Affiliation(s)
- Xuyuan Tang
- Department of Ophthalmology, the First Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiuyi Li
- Department of Ophthalmology, the First Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, China
| | - Dongyan Zhang
- Department of Ophthalmology, the First Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Han
- Department of Ophthalmology, the Second Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, China
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Choi JH, Jang AR, Park MJ, Kim DI, Park JH. Melatonin Inhibits Osteoclastogenesis and Bone Loss in Ovariectomized Mice by Regulating PRMT1-Mediated Signaling. Endocrinology 2021; 162:6169647. [PMID: 33713122 DOI: 10.1210/endocr/bqab057] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Indexed: 12/16/2022]
Abstract
Melatonin, a pineal gland hormone, has been suggested to treat postmenopausal osteoporosis due to its inhibitory effect on osteoclast differentiation. We previously reported that protein arginine methyltransferase 1 (PRMT1) was an important mediator of receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis. However, the relationship between melatonin and PRMT1 in osteoclast differentiation and estrogen deficiency-induced osteoporosis is unclear. In this study, we investigated the inhibitory mechanisms of melatonin in vitro and in vivo by focusing on PRMT1. Melatonin treatment effectively blocked RANKL-induced osteoclastogenesis by inhibiting PRMT1 and asymmetric dimethylarginine (ADMA) expression. RANKL-induced tumor necrosis factor receptor-associated factor 6 (TRAF6) and the phosphorylation of JNK were also suppressed by melatonin, and TRAF6 siRNA attenuated RANKL-induced p-JNK and PRMT1 production. Melatonin inhibited the transcriptional activity of NF-κB by interfering with the binding of PRMT1 and NF-κB subunit p65 in RANKL-treated bone marrow-derived macrophages. Our results also revealed that melatonin inhibits RANKL-induced PRMT1 expression through receptors-independent pathway. Thus, the anti-osteoclastogenic effect of melatonin was mediated by a cascade of inhibition of RANKL-induced TRAF6, JNK, PRMT1, and NF-κB signaling in melatonin receptors-independent pathway. In vivo, ovariectomy caused significant decreases in bone mineral density, but melatonin treatment alleviated the ovariectomized (OVX)-induced bone loss by inhibiting bone resorption. Furthermore, the expression PRMT1 and TRAP mRNA was upregulated in OVX-femurs, but effectively suppressed by melatonin injection. These findings suggest that melatonin inhibited osteoclast differentiation and estrogen deficiency-induced osteoporosis by suppressing RANKL-induced TRAF6, JNK, PRMT1, and NF-κB signaling cascades in melatonin receptors-independent pathway.
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Affiliation(s)
- Joo-Hee Choi
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Ah-Ra Jang
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Min-Jung Park
- Department of Physiology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Dong-Il Kim
- Department of Physiology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jong-Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea
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Nebbioso M, Lambiase A, Armentano M, Tucciarone G, Sacchetti M, Greco A, Alisi L. Diabetic retinopathy, oxidative stress, and sirtuins: an in depth look in enzymatic patterns and new therapeutic horizons. Surv Ophthalmol 2021; 67:168-183. [PMID: 33864872 DOI: 10.1016/j.survophthal.2021.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 12/16/2022]
Abstract
Diabetic retinopathy (DR) is one of the leading causes of blindness in the world. DR represents the most common microvascular complication of diabetes, and its incidence is constantly rising. The complex interactions between inflammation, oxidative stress, and the production of free oxygen radicals caused by prolonged exposure to hyperglycemia determine the development of DR. Sirtuins (SIRTs) are a recently discovered class of 7 histone deacetylases involved in cellular senescence, regulation of cell cycle, metabolic pathways, and DNA repair. SIRTs participate in the progress of several pathologies such as cancer, neurodegeneration, and metabolic diseases. In DR sirtuins 1,3,5, and 6 play an important role as they regulate the activation of the inflammatory response, insulin sensibility, and both glycolysis and gluconeogenesis. A wide spectrum of direct and indirect activators of SIRTs pathways (e.g., antagomiR, resveratrol, or glycyrrhizin) is currently being developed to treat the inflammatory cascade occurring in DR. We focus on the main metabolic and inflammatory pathways involving SIRTs and DR, as well as recent evidence on SIRTs activators that may be employed as novel therapeutic approaches to DR.
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Affiliation(s)
- Marcella Nebbioso
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
| | - Alessandro Lambiase
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy.
| | - Marta Armentano
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
| | - Giosuè Tucciarone
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
| | - Marta Sacchetti
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
| | - Antonio Greco
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
| | - Ludovico Alisi
- Department of Sense Organs, Faculty of Medicine and Odontology, Policlinico Umberto I. Sapienza University of Rome, v. le del Policlinico 155, 00161 Rome, Italy
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Noncoding RNAs involved in DNA methylation and histone methylation, and acetylation in diabetic vascular complications. Pharmacol Res 2021; 170:105520. [PMID: 33639232 DOI: 10.1016/j.phrs.2021.105520] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 02/23/2021] [Indexed: 02/08/2023]
Abstract
Diabetes is a metabolic disorder and its incidence is still increasing. Diabetic vascular complications cause major diabetic mobility and include accelerated atherosclerosis, nephropathy, retinopathy, and neuropathy. Hyperglycemia contributes to the pathogenesis of diabetic vascular complications via numerous mechanisms including the induction of oxidative stress, inflammation, metabolic alterations, and abnormal proliferation of EC and angiogenesis. In the past decade, epigenetic modifications have attracted more attention as they participate in the progression of diabetic vascular complications despite controlled glucose levels and regulate gene expression without altering the genomic sequence. DNA methylation and histone methylation, and acetylation are vital epigenetic modifications and their underlying mechanisms in diabetic vascular complication are still urgently needed to be investigated. Non-coding RNAs (nc RNAs) such as micro RNAs (miRNAs), long non-coding RNA (lncRNAs), and circular RNAs (circ RNAs) were found to exert transcriptional regulation in diabetic vascular complication. Although nc RNAs are not considered as epigenetic components, they are involved in epigenetic modifications. In this review, we summarized the investigations of non-coding RNAs involved in DNA methylation and histone methylation and acetylation. Their cross-talks might offer novel insights into the pathology of diabetic vascular complications.
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Xu Y, Zhang Y, Liang H, Liu X. Coumestrol mitigates retinal cell inflammation, apoptosis, and oxidative stress in a rat model of diabetic retinopathy via activation of SIRT1. Aging (Albany NY) 2021; 13:5342-5357. [PMID: 33536350 PMCID: PMC7950241 DOI: 10.18632/aging.202467] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 10/01/2020] [Indexed: 12/13/2022]
Abstract
Diabetes-induced oxidative stress is vital in initiating neuronal damage in the diabetic retina, leading to diabetic retinopathy (DR). This study investigates the possible effects of coumestrol (CMS) on streptozotocin (STZ)-induced DR. First, we established a rat model of DR by STZ injection and a cell model involving high-glucose (HG) exposure of human retinal microvascular endothelial cells (hRMECs). We characterized the expression patterns of oxidative stress indicators, pro-inflammatory cytokines, and pro-apoptotic proteins in hRMECs. Polymerase chain reaction showed sirtuin 1 (SIRT1) to be poorly expressed in the retinal tissues of STZ-treated rats and HG-exposed hRMECs, but its expression was upregulated upon treatment with CMS treatment. Furthermore, CMS treatment attenuated the STZ-induced pathologies such as oxidative stress, inflammation, and cell apoptosis. Consistent with the in vivo results, CMS activated the expression of SIRT1, thereby inhibiting oxidative stress, inflammation, and apoptosis of HG-treated hRMECs. From these findings, we concluded that CMS ameliorated DR by inhibiting inflammation, apoptosis and oxidative stress through activation of SIRT1.
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Affiliation(s)
- Yanchao Xu
- The Second Ward, Department of Endocrinology and Metabolism, Linyi People's Hospital of Shandong Province, Linyi 276000, P. R. China
| | - Yusong Zhang
- Imaging Center, Linyi People's Hospital of Shandong Province, Linyi 276000, P. R. China
| | - Hongwei Liang
- Department of Health Care, Linyi People's Hospital of Shandong Province, Linyi 276000, P. R. China
| | - Xiaomeng Liu
- The Second Ward, Department of Endocrinology and Metabolism, Linyi People's Hospital of Shandong Province, Linyi 276000, P. R. China
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Matsubara H, Fukuda T, Awazu Y, Nanno S, Shimomura M, Inoue Y, Yamauchi M, Yasui T, Sumi T. PRMT1 expression predicts sensitivity to platinum-based chemotherapy in patients with ovarian serous carcinoma. Oncol Lett 2020; 21:162. [PMID: 33552280 DOI: 10.3892/ol.2020.12423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 12/14/2020] [Indexed: 12/21/2022] Open
Abstract
Patients with ovarian serous carcinoma are generally diagnosed at an advanced disease stage. The standard treatment for these patients is maximal debulking surgery followed by platinum-taxane combination chemotherapy. Despite initially responding well, more than half of patients become refractory to first-line chemotherapy. Upregulation of protein arginine methyltransferase 1 (PRMT1) expression has been demonstrated to methylate apoptosis signal-regulated kinase 1 and inhibit its activity, thereby contributing to chemoresistance. The present study investigated the association between PRMT1 expression and sensitivity to platinum-based chemotherapy in 51 patients with ovarian serous carcinoma (International Federation of Gynecology and Obstetrics stages III and IV), and the effect of RNA interference-mediated downregulation of PRMT1 on the sensitivity of ovarian cancer cells to cisplatin and carboplatin in vitro. Immunohistochemistry of tumor specimens was used to compare the expression levels of PRMT1, a Cell Counting Kit-8 assay and small interfering RNA transfection were performed for chemosensitivity assays, and reverse transcription-quantitative PCR was used to examine PRMT1 mRNA expression. Patients were divided into platinum-sensitive (n=26) and platinum-resistant (n=25) groups. PRMT1 expression was significantly lower in the platinum-sensitive group than in the platinum-resistant group (P=0.019). When patients were categorized according to PRMT1 expression, those in the low PRMT1 expression group were more sensitive to platinum-based chemotherapy than those in the high PRMT1 expression group (P=0.01). Additionally, in vitro experiments revealed that suppression of PRMT1 expression by siRNA significantly increased the sensitivity of human ovarian serous carcinoma cells to cisplatin and carboplatin (P<0.05). In conclusion, PRMT1 expression could predict sensitivity to platinum-based chemotherapy in patients with ovarian serous carcinoma.
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Affiliation(s)
- Hiroaki Matsubara
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Takeshi Fukuda
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Yuichiro Awazu
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Shigenori Nanno
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Masahiro Shimomura
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Yuta Inoue
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Makoto Yamauchi
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Tomoyo Yasui
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Toshiyuki Sumi
- Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
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Nho JH, Park MJ, Park HJ, Lee JH, Choi JH, Oh SJ, Lee YJ, Yu YB, Kim HS, Kim DI, Choi WS. Protein arginine methyltransferase-1 stimulates dopaminergic neuronal cell death in a Parkinson's disease model. Biochem Biophys Res Commun 2020; 530:389-395. [PMID: 32532423 DOI: 10.1016/j.bbrc.2020.05.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/03/2020] [Indexed: 11/17/2022]
Abstract
Recent studies have revealed that protein arginine methyltransferases (PRMTs) are responsible for diverse neurodegenerative diseases. However, their pathophysiological role in dopaminergic neuronal death in Parkinson's disease (PD) has not been evaluated. In this study, we demonstrated that 1-Methyl-4-phenylpyridinium iodide (MPP+), rotenone and paraquat, which cause dopaminergic neuronal cell death, increased PRMT1 expression in dopaminergic cell line. Dopaminergic neuronal cell death was increased by PRMT1 overexpression. MPP+-induced cell death was attenuated by PRMT1 knockdown. Poly (ADP-ribose) polymerase-1 (PARP1) expression and activity, poly-ADP-ribosylation (PARylation), were elevated by MPP+. Moreover, we found that PRMT1 positively regulates nuclear translocation of apoptosis-inducing factor (AIF). Elevated PRMT1 expression was observed in the substantia nigra pars compacta of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-injected mice. Furthermore, MPTP-induced dopaminergic neuronal death was reduced in PRMT1 haploinsufficient (prmt1+/-) mice. These data suggest that PRMT1 is implicated in PARP1/AIF-mediated dopaminergic neuronal cell death, which might be involved in the pathology of PD. Therefore, our results propose PRMT1 as a new target to develop a potential treatment of PD.
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Affiliation(s)
- Jong-Hyun Nho
- College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea; Korean Medicine Non-clinical study (GLP) center, National Institute for Korean Medicine Development, Jangheung-gun 59319, Republic of Korea
| | - Min-Jung Park
- College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea; Departments of Molecular & Integrative Physiology and Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Hyung Joon Park
- School of Biological Sciences and Technology, College of Natural Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jin Ho Lee
- School of Biological Sciences and Technology, College of Natural Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Joo-Hee Choi
- College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea; Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Sang-Jin Oh
- School of Biological Sciences and Technology, College of Natural Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Young-Jin Lee
- Department of Oriental Pharmaceutical Development, Nambu University, Gwangju, 62271, Republic of Korea
| | - Young-Beob Yu
- Department of Oriental Pharmaceutical Development, Nambu University, Gwangju, 62271, Republic of Korea
| | - Hyung-Seok Kim
- Department of Forensic Medicine, Chonnam National University Medical School & Research Institute of Medical Sciences, Hwasun, 58128, Republic of Korea
| | - Dong-Il Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea; Life Science Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Won-Seok Choi
- School of Biological Sciences and Technology, College of Natural Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea; College of Medicine, Chonnam National University, Gwangju, 61469, Republic of Korea.
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Kim E, Jang J, Park JG, Kim KH, Yoon K, Yoo BC, Cho JY. Protein Arginine Methyltransferase 1 (PRMT1) Selective Inhibitor, TC-E 5003, Has Anti-Inflammatory Properties in TLR4 Signaling. Int J Mol Sci 2020; 21:ijms21093058. [PMID: 32357521 PMCID: PMC7246892 DOI: 10.3390/ijms21093058] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/19/2020] [Accepted: 04/25/2020] [Indexed: 12/14/2022] Open
Abstract
Protein arginine methyltransferase 1 (PRMT1) is the most predominant PRMT and is type I, meaning it generates monomethylarginine and asymmetric dimethylarginine. PRMT1 has functions in oxidative stress, inflammation and cancers, and modulates diverse diseases; consequently, numerous trials to develop PRMT1 inhibitors have been attempted. One selective PRMT1 inhibitor is N,N′-(Sulfonyldi-4,1-phenylene)bis(2-chloroacetamide), also named TC-E 5003 (TC-E). In this study, we investigated whether TC-E regulated inflammatory responses. Nitric oxide (NO) production was evaluated by the Griess assay and the inflammatory gene expression was determined by conducting RT-PCR. Western blot analyzing was carried out for inflammatory signaling exploration. TC-E dramatically reduced lipopolysaccharide (LPS)-induced NO production and the expression of inflammatory genes (inducible NO synthase (iNOS), cyclooxygenase (COX)-2, tumor necrosis factor (TNF)-α and interleukin (IL)-6) as determined using RT-PCR. TC-E downregulated the nuclear translocation of the nuclear factor (NF)-κB subunits p65 and p50 and the activator protein (AP)-1 transcriptional factor c-Jun. Additionally, TC-E directly regulated c-Jun gene expression following LPS treatment. In NF-κB signaling, the activation of IκBα and Src was attenuated by TC-E. Taken together, these data show that TC-E modulates the lipopolysaccharide (LPS)-induced AP-1 and NF-κB signaling pathways and could possibly be further developed as an anti-inflammatory compound.
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Affiliation(s)
- Eunji Kim
- Department of Integrative Biotechnology, Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea; (E.K.); (J.J.); (K.Y.)
| | - Jiwon Jang
- Department of Integrative Biotechnology, Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea; (E.K.); (J.J.); (K.Y.)
| | - Jae Gwang Park
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Korea;
| | - Kyung-Hee Kim
- Proteomic Analysis Team, Research Institute, National Cancer Center, Goyang 10408, Korea;
| | - Keejung Yoon
- Department of Integrative Biotechnology, Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea; (E.K.); (J.J.); (K.Y.)
| | - Byong Chul Yoo
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Korea;
- Correspondence: (B.C.Y.); (J.Y.C.); Tel.: +82-31-920-2342 (B.C.Y.); +82-31-290-7876 (J.Y.C.)
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea; (E.K.); (J.J.); (K.Y.)
- Correspondence: (B.C.Y.); (J.Y.C.); Tel.: +82-31-920-2342 (B.C.Y.); +82-31-290-7876 (J.Y.C.)
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Li Y, Peng M, Zeng T, Zheng J, Liao Y, Zhang H, Yang S, Chen L. Protein Arginine Methyltransferase 4 Regulates Adipose Tissue Lipolysis in Type 1 Diabetic Mice. Diabetes Metab Syndr Obes 2020; 13:535-544. [PMID: 32161480 PMCID: PMC7049750 DOI: 10.2147/dmso.s235869] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 02/10/2020] [Indexed: 12/19/2022] Open
Abstract
PURPOSE Hypertriglyceridemia is considered to be driven by increased lipolysis in type 1 diabetes mellitus (T1DM). However, information regarding the transcriptional circuitry that governs lipolysis remains incomplete in T1DM. Protein arginine methyltransferase 4 (PRMT4), a transcriptional coactivation factor, promotes autophagy and may play an important role in lipolysis. We wonder whether activated lipolysis in T1DM is regulated by PRMT4. MATERIALS AND METHODS Recombinant adeno-associated virus was adopted to overexpress PRMT4 in adipose tissue of mice. Streptozotocin (150 mg/kg) was injected intraperitoneally into mice to induce T1DM. Plasma insulin, triglycerides, free fatty acids (FFAs) levels were determined using commercial assay kits. Differentiated adipocytes were applied to verify the regulation of PRMT4 on lipolysis. RESULTS Elevated serum triglycerides and FFAs were observed in PRMT4-overexpressed T1DM mice. We also observed that PRMT4 over-expression induced the decrease of fat pads weights and adipocyte sizes. Moreover, expression levels of lipolysis-related molecules, including ATGL, HSL, and MAGL, and HSL phosphorylation levels were increased in PRMT4-overexpressed mice when compared to those of control mice. In vitro, PRMT4 promoted FFAs release and activated HSL phosphorylation, whereas PRMT4 knockdown inhibited these processes. CONCLUSION PRMT4 promotes lipolysis and increases serum triglyceride in T1DM.
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Affiliation(s)
- Yuanxiang Li
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Miaomiao Peng
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Tianshu Zeng
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Juan Zheng
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Yunfei Liao
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Hao Zhang
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Songtao Yang
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
| | - Lulu Chen
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei430022, People’s Republic of China
- Correspondence: Lulu Chen Email
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Protein Arginine Methyltransferases in Cardiovascular and Neuronal Function. Mol Neurobiol 2019; 57:1716-1732. [PMID: 31823198 DOI: 10.1007/s12035-019-01850-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/01/2019] [Indexed: 12/16/2022]
Abstract
The methylation of arginine residues by protein arginine methyltransferases (PRMTs) is a type of post-translational modification which is important for numerous cellular processes, including mRNA splicing, DNA repair, signal transduction, protein interaction, and transport. PRMTs have been extensively associated with various pathologies, including cancer, inflammation, and immunity response. However, the role of PRMTs has not been well described in vascular and neurological function. Aberrant expression of PRMTs can alter its metabolic products, asymmetric dimethylarginine (ADMA), and symmetric dimethylarginine (SDMA). Increased ADMA levels are recognized as an independent risk factor for cardiovascular disease and mortality. Recent studies have provided considerable advances in the development of small-molecule inhibitors of PRMTs to study their function under normal and pathological states. In this review, we aim to elucidate the particular roles of PRMTs in vascular and neuronal function as a potential target for cardiovascular and neurological diseases.
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Ye TJ, Lu YL, Yan XF, Hu XD, Wang XL. High mobility group box-1 release from H 2O 2-injured hepatocytes due to sirt1 functional inhibition. World J Gastroenterol 2019; 25:5434-5450. [PMID: 31576091 PMCID: PMC6767985 DOI: 10.3748/wjg.v25.i36.5434] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/07/2019] [Accepted: 08/19/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND High mobility group box-1 (HMGB1), recognized as a representative of damage-associated molecular patterns, is released during cell injury/death, triggering the inflammatory response and ultimately resulting in tissue damage. Dozens of studies have shown that HMGB1 is involved in certain diseases, but the details on how injured hepatocytes release HMGB1 need to be elicited.
AIM To reveal HMGB1 release mechanism in hepatocytes undergoing oxidative stress.
METHODS C57BL6/J male mice were fed a high-fat diet for 12 wk plus a single binge of ethanol to induce severe steatohepatitis. Hepatocytes treated with H2O2 were used to establish an in vitro model. Serum alanine aminotransferase, liver H2O2 content and catalase activity, lactate dehydrogenase and 8-hydroxy-2-deoxyguanosine content, nicotinamide adenine dinucleotide (NAD+) levels, and Sirtuin 1 (Sirt1) activity were detected by spectrophotometry. HMGB1 release was measured by enzyme linked immunosorbent assay. HMGB1 translocation was observed by immunohistochemistry/immunofluorescence or Western blot. Relative mRNA levels were assayed by qPCR and protein expression was detected by Western blot. Acetylated HMGB1 and poly(ADP-ribose)polymerase 1 (Parp1) were analyzed by Immunoprecipitation.
RESULTS When hepatocytes were damaged, HMGB1 translocated from the nucleus to the cytoplasm because of its hyperacetylation and was passively released outside both in vivo and in vitro. After treatment with Sirt1-siRNA or Sirt1 inhibitor (EX527), the hyperacetylated HMGB1 in hepatocytes increased, and Sirt1 activity inhibited by H2O2 could be reversed by Parp1 inhibitor (DIQ). Parp1 and Sirt1 are two NAD+-dependent enzymes which play major roles in the decision of a cell to live or die in the context of stress . We showed that NAD+ depletion attributed to Parp1 activation after DNA damage was caused by oxidative stress in hepatocytes and resulted in Sirt1 activity inhibition. On the contrary, Sirt1 suppressed Parp1 by negatively regulating its gene expression and deacetylation.
CONCLUSION The functional inhibition between Parp1 and Sirt1 leads to HMGB1 hyperacetylation, which leads to its translocation from the nucleus to the cytoplasm and finally outside the cell.
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Affiliation(s)
- Ting-Jie Ye
- Department of Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yan-Lin Lu
- Department of Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Department of Oncology and Institute of Traditional Chinese Medicine in Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Xiao-Feng Yan
- Department of Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xu-Dong Hu
- Department of Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xiao-Ling Wang
- Department of Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
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Kumari N, Karmakar A, Ganesan SK. Targeting epigenetic modifications as a potential therapeutic option for diabetic retinopathy. J Cell Physiol 2019; 235:1933-1947. [PMID: 31531859 DOI: 10.1002/jcp.29180] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 08/26/2019] [Indexed: 12/20/2022]
Abstract
Diabetic retinopathy (DR) is the leading cause of visual impairment in adults of working age (20-65 years) in developed countries. The metabolic memory phenomena (persistent effect of a glycemic insult even after retrieved) associated with it has increased the risk of developing the complication even after the termination of the glycemic insult. Hence, the need for finding early diagnosis and treatment options has been of great concern. Epigenetic modifications which generally occur during the beginning stages of the disease are responsible for the metabolic memory effect. Therefore, the therapy based on the reversal of the associated epigenetic mechanism can bring new insight in the area of early diagnosis and treatment mechanism. This review discusses the diabetic retinopathy, its pathogenesis, current treatment options, need of finding novel treatment options, and different epigenetic alterations associated with DR. However, the main focus is emphasized on various epigenetic modifications particularly DNA methylation which are responsible for the initiation and progression of diabetic retinopathy and the use of different epigenetic inhibitors as a novel therapeutic option for DR.
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Affiliation(s)
- Nidhi Kumari
- Laboratory of Translational Genetics, Structural Biology & Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Aditi Karmakar
- Laboratory of Translational Genetics, Structural Biology & Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Senthil Kumar Ganesan
- Laboratory of Translational Genetics, Structural Biology & Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Dulull N, Kwa F, Osman N, Rai U, Shaikh B, Thrimawithana TR. Recent advances in the management of diabetic retinopathy. Drug Discov Today 2019; 24:1499-1509. [DOI: 10.1016/j.drudis.2019.03.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/01/2019] [Accepted: 03/28/2019] [Indexed: 12/15/2022]
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24
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Porta M, Amione C, Barutta F, Fornengo P, Merlo S, Gruden G, Albano L, Ciccarelli M, Ungaro P, Durazzo M, Beguinot F, Berchialla P, Cavallo F, Trento M. The co-activator-associated arginine methyltransferase 1 (CARM1) gene is overexpressed in type 2 diabetes. Endocrine 2019; 63:284-292. [PMID: 30173329 DOI: 10.1007/s12020-018-1740-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 08/23/2018] [Indexed: 12/31/2022]
Abstract
PURPOSE We examined the expression of a panel of epigenetic enzymes catalyzing histone tails post-transcriptional modifications, together with effectors of metabolic and inflammatory alterations, in type 2 diabetes. METHODS Cross-sectional, case-control study of 21 people with type 2 diabetes and 21 matched controls. Total RNA was extracted from white cells and reverse transcribed. PCR primer assays for 84 key genes encoding enzymes known to modify genomic DNA and histones were performed. Western blot was performed on lysates using primary antibodies for abnormally expressed enzymes. Hormones and cytokines were measured by multiplex kits. A Bayesian network was built to investigate the relationships between epigenetic, cytokine, and endocrine variables. RESULTS Co-activator-associated aRginine Methyltransferase 1 (CARM1) expression showed a five-fold higher median value, matched by higher protein levels, among patients who also had increased GIP, IL-4, IL-7, IL-13, IL-17, FGF basic, G-CSF, IFN-γ, and TNFα and decreased IP-10. In a Bayesian network approach, CARM1 expression showed a conditional dependence on diabetes, but was independent of all other variables nor appeared to influence any. CONCLUSIONS Increased CARM1 expression in type 2 diabetes suggests that epigenetic mechanisms are altered in human diabetes. The impact of lifestyle and pharmacological treatment on regulation of this enzyme should be further investigated.
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Affiliation(s)
- Massimo Porta
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy.
| | - Cristina Amione
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Federica Barutta
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Paolo Fornengo
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Stefano Merlo
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Gabriella Gruden
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Luigi Albano
- National Research Council, URT of the Institute of Experimental Endocrinology Oncology "G. Salvatore", Naples, Italy
| | - Marco Ciccarelli
- National Research Council, URT of the Institute of Experimental Endocrinology Oncology "G. Salvatore", Naples, Italy
| | - Paola Ungaro
- National Research Council, URT of the Institute of Experimental Endocrinology Oncology "G. Salvatore", Naples, Italy
| | - Marilena Durazzo
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
| | - Francesco Beguinot
- National Research Council, URT of the Institute of Experimental Endocrinology Oncology "G. Salvatore", Naples, Italy
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Paola Berchialla
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - Franco Cavallo
- Department of Public Health and Paediatric Sciences, University of Turin, Turin, Italy
| | - Marina Trento
- Department of Medical Sciences, Laboratory of Clinical Pedagogy, University of Turin, Turin, Italy
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PRMT1 mediates RANKL-induced osteoclastogenesis and contributes to bone loss in ovariectomized mice. Exp Mol Med 2018; 50:1-15. [PMID: 30154485 PMCID: PMC6113271 DOI: 10.1038/s12276-018-0134-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 05/14/2018] [Accepted: 05/29/2018] [Indexed: 12/25/2022] Open
Abstract
Protein arginine methylation is a novel form of posttranslational modification mediated by protein arginine methyltransferase (PRMTs). PRMT1, a major isoform of the PRMT family, is responsible for various biological functions, including cellular differentiation. Although the important function that PRMT1 plays in various tissues is being increasingly recognized, its role in receptor activation of NF-κB ligand (RANKL)-induced osteoclastogenesis or osteoporosis has not yet been described. Here, we show that PRMT1 is essential for RANKL-induced osteoclastogenesis in vitro and for bone loss in vivo. RANKL treatment increased the expression of PRMT1 and its nuclear localization in bone marrow-derived macrophages (BMDMs) in a c-Jun N-terminal kinase (JNK)-dependent manner. Silencing PRMT1 attenuated RANKL-induced osteoclastogenesis by decreasing tartrate-resistant acid phosphatase (TRAP)-positive cells and inhibiting F-actin ring formation and bone resorption, which was confirmed in a separate experiment using haploinsufficient cells from PRMT1+/- mice. Our results also revealed that PRMT1 regulates the transcription activity of NF-κB by directly interacting with it in RANKL-treated BMDMs. An in vivo study showed that the haploinsufficiency of PRMT1 reduced the enzyme activity of TRAP and increased the bone mineral density in the metaphysis of ovariectomized (OVX) mice. Finally, treatment with estrogen (E2) downregulated the RANKL-induced expression of PRMT1, suggesting that estrogen may exert an inhibitory effect on osteoclastogenesis by suppressing PRMT1 expression. Our results suggest that PRMT1 plays an important role in the progression of osteoporosis and that it might be a good therapeutic target for postmenopausal osteoporosis. A protein that helps trigger bone loss in postmenopausal osteoporosis could be a potential therapeutic target. After the menopause, decreases in estrogen hormone levels can lead to bone diseases including osteoporosis. Osteoporosis occurs when the bone remodeling process breaks down, and bone resorption by cells called osteoclasts outweighs bone formation. In a mouse model of postmenopausal osteoporosis, Jong-Hwan Park at Chonnam National University, Gwangju, South Korea and co-workers identified key players in the progression of the disease. The team focused on factors influencing the RANKL protein, a known controller of bone remodeling. They found that RANKL triggers the formation of osteoclasts via interaction with another protein, PRMT1. Suppression of PRMT1 by estrogen appears to inhibit excessive osteoclast formation, suggesting it could be a potential therapeutic target for treating osteoporosis.
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26
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Corso-Díaz X, Jaeger C, Chaitankar V, Swaroop A. Epigenetic control of gene regulation during development and disease: A view from the retina. Prog Retin Eye Res 2018; 65:1-27. [PMID: 29544768 PMCID: PMC6054546 DOI: 10.1016/j.preteyeres.2018.03.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 02/01/2018] [Accepted: 03/08/2018] [Indexed: 12/20/2022]
Abstract
Complex biological processes, such as organogenesis and homeostasis, are stringently regulated by genetic programs that are fine-tuned by epigenetic factors to establish cell fates and/or to respond to the microenvironment. Gene regulatory networks that guide cell differentiation and function are modulated and stabilized by modifications to DNA, RNA and proteins. In this review, we focus on two key epigenetic changes - DNA methylation and histone modifications - and discuss their contribution to retinal development, aging and disease, especially in the context of age-related macular degeneration (AMD) and diabetic retinopathy. We highlight less-studied roles of DNA methylation and provide the RNA expression profiles of epigenetic enzymes in human and mouse retina in comparison to other tissues. We also review computational tools and emergent technologies to profile, analyze and integrate epigenetic information. We suggest implementation of editing tools and single-cell technologies to trace and perturb the epigenome for delineating its role in transcriptional regulation. Finally, we present our thoughts on exciting avenues for exploring epigenome in retinal metabolism, disease modeling, and regeneration.
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Affiliation(s)
- Ximena Corso-Díaz
- Neurobiology-Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Catherine Jaeger
- Neurobiology-Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Vijender Chaitankar
- Neurobiology-Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Anand Swaroop
- Neurobiology-Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
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27
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Khullar M, Cheema BS, Raut SK. Emerging Evidence of Epigenetic Modifications in Vascular Complication of Diabetes. Front Endocrinol (Lausanne) 2017; 8:237. [PMID: 29085333 PMCID: PMC5649155 DOI: 10.3389/fendo.2017.00237] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 08/29/2017] [Indexed: 01/04/2023] Open
Abstract
Genes, dietary, and lifestyle factors have been shown to be important in the pathophysiology of diabetes and associated microvascular complications. Epigenetic modifications, such as DNA methylation, histone acetylation, and post-transcriptional RNA regulation, are being increasingly recognized as important mediators of the complex interplay between genes and the environment. Recent studies suggest that diabetes-induced dysregulation of epigenetic mechanisms resulting in altered gene expression in target cells can lead to diabetes-associated complications, such as diabetic cardiomyopathy, diabetic nephropathy, retinopathy, and so on, which are the major contributors to diabetes-associated morbidity and mortality. Thus, knowledge of dysregulated epigenetic pathways involved in diabetes can provide much needed new drug targets for these diseases. In this review, we constructed our search strategy to highlight the role of DNA methylation, modifications of histones and role of non-coding RNAs (microRNAs and long non-coding RNAs) in vascular complications of diabetes, including cardiomyopathy, nephropathy, and retinopathy.
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Affiliation(s)
- Madhu Khullar
- Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | | | - Satish K. Raut
- Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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28
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Park MJ, Han HJ, Kim DI. Lipotoxicity-Induced PRMT1 Exacerbates Mesangial Cell Apoptosis via Endoplasmic Reticulum Stress. Int J Mol Sci 2017; 18:ijms18071421. [PMID: 28671608 PMCID: PMC5535913 DOI: 10.3390/ijms18071421] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 06/22/2017] [Accepted: 06/29/2017] [Indexed: 12/20/2022] Open
Abstract
Lipotoxicity-induced mesangial cell apoptosis is implicated in the exacerbation of diabetic nephropathy (DN). Protein arginine methyltransferases (PRMTs) have been known to regulate a variety of biological functions. Recently, it was reported that PRMT1 expression is increased in proximal tubule cells under diabetic conditions. However, their roles in mesangial cells remain unexplored. Thus, we examined the pathophysiological roles of PRMTs in mesangial cell apoptosis. Treatment with palmitate, which mimics cellular lipotoxicity, induced mesangial cell apoptosis via protein kinase RNA-like endoplasmic reticulum kinase (PERK) and ATF6-mediated endoplasmic reticulum (ER) stress signaling. Palmitate treatment increased PRMT1 expression and activity in mesangial cells as well. Moreover, palmitate-induced ER stress activation and mesangial cell apoptosis was diminished by PRMT1 knockdown. In the mice study, high fat diet-induced glomerular apoptosis was attenuated in PRMT1 haploinsufficient mice. Together, these results provide evidence that lipotoxicity-induced PRMT1 expression promotes ER stress-mediated mesangial cell apoptosis. Strategies to regulate PRMT1 expression or activity could be used to prevent the exacerbation of DN.
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Affiliation(s)
- Min-Jung Park
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
| | - Ho Jae Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea.
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Korea.
| | - Dong-Il Kim
- Life Science Institutes, University of Michigan, Ann Arbor, MI 48109, USA.
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29
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Li X, Lai Y, Li J, Zou M, Zou C. Oxidative stress destabilizes protein arginine methyltransferase 4 via glycogen synthase kinase 3β to impede lung epithelial cell migration. Am J Physiol Cell Physiol 2017. [PMID: 28637674 DOI: 10.1152/ajpcell.00073.2017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Oxidative stress impacts normal cellular function leading to the pathogenesis of various diseases including pulmonary illnesses. Protein arginine methyltransferase 4 (PRMT4) is critical for normal lung alveolar epithelial cell development; however, the regulation of PRMT4 within such pulmonary diseases has yet to be elucidated. Using biochemical approaches, we uncovered that peroxide (H2O2) treatment decreases PRMT4 protein stability in murine lung epithelial (MLE12) cells to impede cell migration. Protein kinase glycogen synthase kinase 3β (GSK-3β) interacts with PRMT4 and catalyzes PRMT4 T132 phosphorylation that protects PRMT4 from ubiquitin proteasomal degradation. H2O2 downregulates GSK-3β to reduce PRMT4 at protein level. PRMT4 promotes cell migration and H2O2 degrades PRMT4 to inhibit lung epithelial cell migration. These observations demonstrate that oxidative stress destabilizes PRMT4 via GSK-3β signaling to impede lung epithelial cell migration that may hinder the lung repair and regeneration process.
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Affiliation(s)
- Xiuying Li
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Yandong Lai
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Jin Li
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Mingyi Zou
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Chunbin Zou
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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30
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Kietzmann T, Petry A, Shvetsova A, Gerhold JM, Görlach A. The epigenetic landscape related to reactive oxygen species formation in the cardiovascular system. Br J Pharmacol 2017; 174:1533-1554. [PMID: 28332701 PMCID: PMC5446579 DOI: 10.1111/bph.13792] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular diseases are among the leading causes of death worldwide. Reactive oxygen species (ROS) can act as damaging molecules but also represent central hubs in cellular signalling networks. Increasing evidence indicates that ROS play an important role in the pathogenesis of cardiovascular diseases, although the underlying mechanisms and consequences of pathophysiologically elevated ROS in the cardiovascular system are still not completely resolved. More recently, alterations of the epigenetic landscape, which can affect DNA methylation, post-translational histone modifications, ATP-dependent alterations to chromatin and non-coding RNA transcripts, have been considered to be of increasing importance in the pathogenesis of cardiovascular diseases. While it has long been accepted that epigenetic changes are imprinted during development or even inherited and are not changed after reaching the lineage-specific expression profile, it becomes more and more clear that epigenetic modifications are highly dynamic. Thus, they might provide an important link between the actions of ROS and cardiovascular diseases. This review will provide an overview of the role of ROS in modulating the epigenetic landscape in the context of the cardiovascular system. LINKED ARTICLES This article is part of a themed section on Redox Biology and Oxidative Stress in Health and Disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.12/issuetoc.
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Affiliation(s)
- Thomas Kietzmann
- Faculty of Biochemistry and Molecular Medicine, Biocenter OuluUniversity of OuluOuluFinland
| | - Andreas Petry
- Experimental and Molecular Pediatric CardiologyGerman Heart Center Munich at the TU MunichMunichGermany
- DZHK (German Centre for Cardiovascular Research)Partner Site Munich Heart AllianceMunichGermany
| | - Antonina Shvetsova
- Faculty of Biochemistry and Molecular Medicine, Biocenter OuluUniversity of OuluOuluFinland
| | - Joachim M Gerhold
- Institute of Molecular and Cell BiologyUniversity of TartuTartuEstonia
| | - Agnes Görlach
- Experimental and Molecular Pediatric CardiologyGerman Heart Center Munich at the TU MunichMunichGermany
- DZHK (German Centre for Cardiovascular Research)Partner Site Munich Heart AllianceMunichGermany
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Ackloo S, Brown PJ, Müller S. Chemical probes targeting epigenetic proteins: Applications beyond oncology. Epigenetics 2017; 12:378-400. [PMID: 28080202 PMCID: PMC5453191 DOI: 10.1080/15592294.2017.1279371] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/23/2016] [Accepted: 01/02/2017] [Indexed: 12/15/2022] Open
Abstract
Epigenetic chemical probes are potent, cell-active, small molecule inhibitors or antagonists of specific domains in a protein; they have been indispensable for studying bromodomains and protein methyltransferases. The Structural Genomics Consortium (SGC), comprising scientists from academic and pharmaceutical laboratories, has generated most of the current epigenetic chemical probes. Moreover, the SGC has shared about 4 thousand aliquots of these probes, which have been used primarily for phenotypic profiling or to validate targets in cell lines or primary patient samples cultured in vitro. Epigenetic chemical probes have been critical tools in oncology research and have uncovered mechanistic insights into well-established targets, as well as identify new therapeutic starting points. Indeed, the literature primarily links epigenetic proteins to oncology, but applications in inflammation, viral, metabolic and neurodegenerative diseases are now being reported. We summarize the literature of these emerging applications and provide examples where existing probes might be used.
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Affiliation(s)
- Suzanne Ackloo
- Structural Genomics Consortium, University of Toronto, Toronto, ON, Canada
| | - Peter J. Brown
- Structural Genomics Consortium, University of Toronto, Toronto, ON, Canada
| | - Susanne Müller
- Structural Genomics Consortium, Buchmann Institute for Molecular Life Sciences, Max-von-Laue-Straβe 15, Frankfurt am Main, Germany
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32
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Metabolism and chromatin dynamics in health and disease. Mol Aspects Med 2017; 54:1-15. [DOI: 10.1016/j.mam.2016.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 09/22/2016] [Accepted: 09/27/2016] [Indexed: 01/04/2023]
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Wang W, Sidoli S, Zhang W, Wang Q, Wang L, Jensen ON, Guo L, Zhao X, Zheng L. Abnormal levels of histone methylation in the retinas of diabetic rats are reversed by minocycline treatment. Sci Rep 2017; 7:45103. [PMID: 28338045 PMCID: PMC5364468 DOI: 10.1038/srep45103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 02/17/2017] [Indexed: 02/07/2023] Open
Abstract
In this study we quantified the alterations of retinal histone post-translational modifications (PTMs) in diabetic rats using a liquid chromatography - tandem mass spectrometry (LC-MS/MS) approach. Some diabetic rats were subsequently treated with minocycline, a tetracycline antibiotic, which has been shown to inhibit the diabetes-induced chronic inflammation in the retinas of rodents. We quantified 266 differentially modified histone peptides, including 48 out of 83 methylation marks with significantly different abundancein retinas of diabetic rats as compared to non-diabetic controls. About 67% of these marks had their relative abundance restored to non-diabetic levels after minocycline treatment. Mono- and di-methylation states of histone H4 lysine 20 (H4K20me1/me2), markers related to DNA damage response, were found to be up-regulated in the retinas of diabetic rats and restored to control levels upon minocycline treatment. DNA damage response biomarkers showed the same pattern once quantified by western blotting. Collectively, this study indicates that alteration of some histone methylation levels is associated with the development of diabetic retinopathy in rodents, and the beneficial effect of minocycline on the retinas of diabetic rodents is partially through its ability to normalize the altered histone methylation levels.
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Affiliation(s)
- Wenjun Wang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Simone Sidoli
- Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Wenquan Zhang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Qing Wang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Leilei Wang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Ole N Jensen
- Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Lin Guo
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Xiaolu Zhao
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
| | - Ling Zheng
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, P.R. China
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Li C, Miao X, Li F, Wang S, Liu Q, Wang Y, Sun J. Oxidative Stress-Related Mechanisms and Antioxidant Therapy in Diabetic Retinopathy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9702820. [PMID: 28265339 PMCID: PMC5317113 DOI: 10.1155/2017/9702820] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/27/2016] [Accepted: 12/27/2016] [Indexed: 02/07/2023]
Abstract
Diabetic retinopathy (DR) is one of the most common microvascular complications of diabetes and is the leading cause of blindness in young adults. Oxidative stress has been implicated as a critical cause of DR. Metabolic abnormalities induced by high-glucose levels are involved in the development of DR and appear to be influenced by oxidative stress. The imbalance between reactive oxygen species (ROS) production and the antioxidant defense system activates several oxidative stress-related mechanisms that promote the pathogenesis of DR. The damage caused by oxidative stress persists for a considerable time, even after the blood glucose concentration has returned to a normal level. Animal experiments have proved that the use of antioxidants is a beneficial therapeutic strategy for the treatment of DR, but more data are required from clinical trials. The aims of this review are to highlight the improvements to our understanding of the oxidative stress-related mechanisms underlying the development of DR and provide a summary of the main antioxidant therapy strategies used to treat the disease.
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Affiliation(s)
- Cheng Li
- The First Hospital of Jilin University, Changchun 130021, China
| | - Xiao Miao
- The Second Hospital of Jilin University, Changchun 130041, China
| | - Fengsheng Li
- General Hospital of the PLA Rocket Force, Beijing 100088, China
| | - Shudong Wang
- The First Hospital of Jilin University, Changchun 130021, China
| | - Quan Liu
- The First Hospital of Jilin University, Changchun 130021, China
| | - Yonggang Wang
- The First Hospital of Jilin University, Changchun 130021, China
| | - Jian Sun
- The First Hospital of Jilin University, Changchun 130021, China
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35
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Charles S, Raj V, Arokiaraj J, Mala K. Caveolin1/protein arginine methyltransferase1/sirtuin1 axis as a potential target against endothelial dysfunction. Pharmacol Res 2017; 119:1-11. [PMID: 28126510 DOI: 10.1016/j.phrs.2017.01.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/20/2016] [Accepted: 01/22/2017] [Indexed: 12/23/2022]
Abstract
Endothelial dysfunction (ED), an established response to cardiovascular risk factors, is characterized by increased levels of soluble molecules secreted by endothelial cells (EC). Evidence suggest that ED is an independent predictor of cardiac events and that it is associated with a deficiency in production or bioavailability of nitric oxide (NO) and/or an imbalance in the relative contribution of endothelium-derived relaxing and contracting factors. ED can be reversed by treating cardiovascular risk factors, hence, beyond ambiguity, ED contributes to initiation and progression of atherosclerotic disease. Majority of cardiovascular risk factors act by a common pathway, oxidative stress (OS), characterized by an imbalance in bioavailability of NO and reactive oxygen species (ROS). Enhanced ROS, through several mechanisms, alters competence of EC that leads to ED, reducing its potential to maintain homeostasis and resulting in development of cardiovascular disease (CVD). Influential mechanisms that have been implicated in the development of ED include (i) presence of elevated levels of NOS inhibitor, asymmetric dimethylarginine (ADMA) due to augmented enzyme activity of protein arginine methyl transferase-1 (PRMT1); (ii) decrease in NO generation by endothelial nitric oxide synthase (eNOS) uncoupling, or by reaction of NO with free radicals and (iii) impaired post translational modification of protein (PTM) such as eNOS, caveolin-1 (cav1) and sirtuin-1 (SIRT1). However, the inter-related mechanisms that concur to developing ED is yet to be understood. The events that possibly overlay include OS-induced sequestration of SIRT1 to caveolae facilitating cav1-SIRT1 association; potential increase in lysine acetylation of enzymes such as eNOS and PRMT1 leading to enhanced ADMA formation; imbalance in acetylation-methylation ratio (AMR); diminished NO generation and ED. Here we review current literature from research showing interdependent association between cav1-PRMT1-SIRT1 to the outcomes of experimental and clinical research aiming to preserve endothelial function with gene- or pharmaco-therapy.
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Affiliation(s)
- Soniya Charles
- Department of Biotechnology, School of Bioengineering, SRM University, Potheri 603203, Tamil Nadu, India
| | - Vijay Raj
- Medical College Hospital and Research Center, SRM University, Potheri 603203, Tamil Nadu, India
| | - Jesu Arokiaraj
- Department of Biotechnology, Faculty of Science and Humanities, SRM University, Potheri 603203, Tamil Nadu, India
| | - Kanchana Mala
- Medical College Hospital and Research Center, SRM University, Potheri 603203, Tamil Nadu, India.
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