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Qian ZY, Pan YQ, Li XX, Chen YX, Wu HX, Liu ZX, Kosar M, Bartek J, Wang ZX, Xu RH. Modulator of TMB-associated immune infiltration (MOTIF) predicts immunotherapy response and guides combination therapy. Sci Bull (Beijing) 2024; 69:803-822. [PMID: 38320897 DOI: 10.1016/j.scib.2024.01.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/04/2023] [Accepted: 12/07/2023] [Indexed: 02/08/2024]
Abstract
Patients with high tumor mutational burden (TMB) levels do not consistently respond to immune checkpoint inhibitors (ICIs), possibly because a high TMB level does not necessarily result in adequate infiltration of CD8+ T cells. Using bulk ribonucleic acid sequencing (RNA-seq) data from 9311 tumor samples across 30 cancer types, we developed a novel tool called the modulator of TMB-associated immune infiltration (MOTIF), which comprises genes that can determine the extent of CD8+ T cell infiltration prompted by a certain TMB level. We confirmed that MOTIF can accurately reflect the integrity and defects of the cancer-immunity cycle. By analyzing 84 human single-cell RNA-seq datasets from 32 types of solid tumors, we revealed that MOTIF can provide insights into the diverse roles of various cell types in the modulation of CD8+ T cell infiltration. Using pretreatment RNA-seq data from 13 ICI-treated cohorts, we validated the use of MOTIF in predicting CD8+ T cell infiltration and ICI efficacy. Among the components of MOTIF, we identified EMC3 as a negative regulator of CD8+ T cell infiltration, which was validated via in vivo studies. Additionally, MOTIF provided guidance for the potential combinations of programmed death 1 blockade with certain immunostimulatory drugs to facilitate CD8+ T cell infiltration and improve ICI efficacy.
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Affiliation(s)
- Zheng-Yu Qian
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China
| | - Yi-Qian Pan
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China
| | - Xue-Xin Li
- Science for Life Laboratory, Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm S-171 21, Sweden; Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang 110032, China
| | - Yan-Xing Chen
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China
| | - Hao-Xiang Wu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China
| | - Ze-Xian Liu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China; Bioinformatics Platform, Sun Yat-sen University Cancer Center, Guangzhou 510060, China; Laboratory of Artificial Intelligence and Data Science, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Martin Kosar
- Science for Life Laboratory, Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm S-171 21, Sweden; Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Haining 314400, China; Edinburgh Medical School, Biomedical Sciences, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh EH1 1LT, UK
| | - Jiri Bartek
- Science for Life Laboratory, Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm S-171 21, Sweden; Danish Cancer Society Research Center, Copenhagen DK-2100, Denmark.
| | - Zi-Xian Wang
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China; Laboratory of Artificial Intelligence and Data Science, Sun Yat-sen University Cancer Center, Guangzhou 510060, China.
| | - Rui-Hua Xu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Provincial Clinical Research Center for Cancer, Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, Guangzhou 510060, China; Laboratory of Artificial Intelligence and Data Science, Sun Yat-sen University Cancer Center, Guangzhou 510060, China.
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Mozzetta C, Sartorelli V, Steinkuhler C, Puri PL. HDAC inhibitors as pharmacological treatment for Duchenne muscular dystrophy: a discovery journey from bench to patients. Trends Mol Med 2024; 30:278-294. [PMID: 38408879 PMCID: PMC11095976 DOI: 10.1016/j.molmed.2024.01.007] [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: 11/11/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/28/2024]
Abstract
Earlier evidence that targeting the balance between histone acetyltransferases (HATs) and deacetylases (HDACs), through exposure to HDAC inhibitors (HDACis), could enhance skeletal myogenesis, prompted interest in using HDACis to promote muscle regeneration. Further identification of constitutive HDAC activation in dystrophin-deficient muscles, caused by dysregulated nitric oxide (NO) signaling, provided the rationale for HDACi-based therapeutic interventions for Duchenne muscular dystrophy (DMD). In this review, we describe the molecular, preclinical, and clinical evidence supporting the efficacy of HDACis in countering disease progression by targeting pathogenic networks of gene expression in multiple muscle-resident cell types of patients with DMD. Given that givinostat is paving the way for HDACi-based interventions in DMD, next-generation HDACis with optimized therapeutic profiles and efficacy could be also explored for synergistic combinations with other therapeutic strategies.
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Affiliation(s)
- Chiara Mozzetta
- Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR) of Italy, Rome, Italy
| | - Vittorio Sartorelli
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, USA
| | | | - Pier Lorenzo Puri
- Development, Aging, and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.
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Cordeiro-Spinetti E, Rothbart SB. Lysine methylation signaling in skeletal muscle biology: from myogenesis to clinical insights. Biochem J 2023; 480:1969-1986. [PMID: 38054592 DOI: 10.1042/bcj20230223] [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: 09/28/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/07/2023]
Abstract
Lysine methylation signaling is well studied for its key roles in the regulation of transcription states through modifications on histone proteins. While histone lysine methylation has been extensively studied, recent discoveries of lysine methylation on thousands of non-histone proteins has broadened our appreciation for this small chemical modification in the regulation of protein function. In this review, we highlight the significance of histone and non-histone lysine methylation signaling in skeletal muscle biology, spanning development, maintenance, regeneration, and disease progression. Furthermore, we discuss potential future implications for its roles in skeletal muscle biology as well as clinical applications for the treatment of skeletal muscle-related diseases.
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Affiliation(s)
| | - Scott B Rothbart
- Department of Epigenetics, Van Andel Institute, Grand Rapids, Michigan 49503, U.S.A
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4
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Uba AI, Zengin G. In the quest for histone deacetylase inhibitors: current trends in the application of multilayered computational methods. Amino Acids 2023; 55:1709-1726. [PMID: 37367966 DOI: 10.1007/s00726-023-03297-y] [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: 04/15/2023] [Accepted: 06/20/2023] [Indexed: 06/28/2023]
Abstract
Histone deacetylase (HDAC) inhibitors have gained attention over the past three decades because of their potential in the treatment of different diseases including various forms of cancers, neurodegenerative disorders, autoimmune, inflammatory diseases, and other metabolic disorders. To date, 5 HDAC inhibitor drugs are marketed for the treatment of hematological malignancies and several drug-candidate HDAC inhibitors are at different stages of clinical trials. However, due to the toxic side effects of these drugs resulting from the lack of target selectivity, active studies are ongoing to design and develop either class-selective or isoform-selective inhibitors. Computational methods have aided the discovery of HDAC inhibitors with the desired potency and/or selectivity. These methods include ligand-based approaches such as scaffold hopping, pharmacophore modeling, three-dimensional quantitative structure-activity relationships (3D-QSAR); and structure-based virtual screening (molecular docking). The current trends involve the application of the combination of these methods and incorporating molecular dynamics simulations coupled with Poisson-Boltzmann/molecular mechanics generalized Born surface area (MM-PBSA/MM-GBSA) to improve the prediction of ligand binding affinity. This review aimed at understanding the current trends in applying these multilayered strategies and their contribution to the design/identification of HDAC inhibitors.
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Affiliation(s)
- Abdullahi Ibrahim Uba
- Department of Molecular Biology and Genetics, Istanbul AREL University, Istanbul, 34537, Turkey.
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya, 42130, Turkey.
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5
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Dai W, Wu G, Liu K, Chen Q, Tao J, Liu H, Shen M. Lactate promotes myogenesis via activating H3K9 lactylation-dependent up-regulation of Neu2 expression. J Cachexia Sarcopenia Muscle 2023; 14:2851-2865. [PMID: 37919243 PMCID: PMC10751423 DOI: 10.1002/jcsm.13363] [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: 05/29/2023] [Revised: 09/12/2023] [Accepted: 09/20/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND Lactate, a glycolytic metabolite mainly produced in muscles, has been suggested to regulate myoblast differentiation, although the underlying mechanism remains elusive. Recently, lactate-mediated histone lactylation is identified as a novel epigenetic modification that promotes gene transcription. METHODS We used mouse C2C12 cell line and 2-month-old male mice as in vitro and in vivo models, respectively. These models were treated with lactate to explore the biological function and latent mechanism of lactate-derived histone lactylation on myogenic differentiation by quantitative real-time PCR, western blotting, immunofluorescence staining, chromatin immunoprecipitation, cleavage under targets and tagmentation assay and RNA sequencing. RESULTS Using immunofluorescence staining and western blotting, we proposed that lactylation might occur in the histones. Inhibition of lactate production or intake both impaired myoblast differentiation, accompanied by diminished lactylation in the histones. Using lactylation site-specific antibodies, we demonstrated that lactate preferentially increased H3K9 lactylation (H3K9la) during myoblast differentiation (CT VS 5, 10, 15, 20, 25 mM lactate treatment, P = 0.0012, P = 0.0007, and the rest of all P < 0.0001). Notably, inhibiting H3K9la using P300 antagonist could block lactate-induced myogenesis. Through combined omics analysis using cleavage under targets and tagmentation assay and RNA sequencing, we further identified Neu2 as a potential target gene of H3K9la. IGV software analysis (P = 0.0013) and chromatin immunoprecipitation-qPCR assay (H3K9la %Input, LA group = 9.0076, control group = 2.7184, IgG = 0.3209) confirmed that H3K9la is enriched in the promoter region of Neu2. Moreover, siRNAs or inhibitors against Neu2 both abrogated myoblast differentiation despite lactate treatment, suggesting that Neu2 is required for lactate-mediated myoblast differentiation. CONCLUSIONS Our findings provide novel understanding of histone lysine lactylation, suggesting its role in myogenesis, and as potential therapeutic targets for muscle diseases.
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Affiliation(s)
- Weilong Dai
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Gang Wu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Ke Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Qianqian Chen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Jingli Tao
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Honglin Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
| | - Ming Shen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and TechnologyNanjing Agricultural UniversityNanjingChina
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6
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Pomella S, Danielli SG, Alaggio R, Breunis WB, Hamed E, Selfe J, Wachtel M, Walters ZS, Schäfer BW, Rota R, Shipley JM, Hettmer S. Genomic and Epigenetic Changes Drive Aberrant Skeletal Muscle Differentiation in Rhabdomyosarcoma. Cancers (Basel) 2023; 15:2823. [PMID: 37345159 DOI: 10.3390/cancers15102823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 06/23/2023] Open
Abstract
Rhabdomyosarcoma (RMS), the most common soft-tissue sarcoma in children and adolescents, represents an aberrant form of skeletal muscle differentiation. Both skeletal muscle development, as well as regeneration of adult skeletal muscle are governed by members of the myogenic family of regulatory transcription factors (MRFs), which are deployed in a highly controlled, multi-step, bidirectional process. Many aspects of this complex process are deregulated in RMS and contribute to tumorigenesis. Interconnected loops of super-enhancers, called core regulatory circuitries (CRCs), define aberrant muscle differentiation in RMS cells. The transcriptional regulation of MRF expression/activity takes a central role in the CRCs active in skeletal muscle and RMS. In PAX3::FOXO1 fusion-positive (PF+) RMS, CRCs maintain expression of the disease-driving fusion oncogene. Recent single-cell studies have revealed hierarchically organized subsets of cells within the RMS cell pool, which recapitulate developmental myogenesis and appear to drive malignancy. There is a large interest in exploiting the causes of aberrant muscle development in RMS to allow for terminal differentiation as a therapeutic strategy, for example, by interrupting MEK/ERK signaling or by interfering with the epigenetic machinery controlling CRCs. In this review, we provide an overview of the genetic and epigenetic framework of abnormal muscle differentiation in RMS, as it provides insights into fundamental mechanisms of RMS malignancy, its remarkable phenotypic diversity and, ultimately, opportunities for therapeutic intervention.
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Affiliation(s)
- Silvia Pomella
- Department of Hematology/Oncology, Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS Istituto Ospedale Pediatrico Bambino Gesu, Viale San Paolo 15, 00146 Rome, Italy
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy
| | - Sara G Danielli
- Department of Oncology and Children's Research Center, University Children's Hospital of Zurich, 8032 Zürich, Switzerland
| | - Rita Alaggio
- Department of Pathology, Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS, Viale San Paolo 15, 00146 Rome, Italy
| | - Willemijn B Breunis
- Department of Oncology and Children's Research Center, University Children's Hospital of Zurich, 8032 Zürich, Switzerland
| | - Ebrahem Hamed
- Division of Pediatric Hematology and Oncology, Department of Pediatric and Adolescent Medicine, University Medical Center Freiburg, University of Freiburg, 79106 Freiburg, Germany
| | - Joanna Selfe
- Sarcoma Molecular Pathology Team, Divisions of Molecular Pathology and Cancer Therapeutics, The Institute of Cancer Research, London SM2 FNG, UK
| | - Marco Wachtel
- Department of Oncology and Children's Research Center, University Children's Hospital of Zurich, 8032 Zürich, Switzerland
| | - Zoe S Walters
- Translational Epigenomics Team, Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, UK
| | - Beat W Schäfer
- Department of Oncology and Children's Research Center, University Children's Hospital of Zurich, 8032 Zürich, Switzerland
| | - Rossella Rota
- Department of Hematology/Oncology, Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS Istituto Ospedale Pediatrico Bambino Gesu, Viale San Paolo 15, 00146 Rome, Italy
| | - Janet M Shipley
- Sarcoma Molecular Pathology Team, Divisions of Molecular Pathology and Cancer Therapeutics, The Institute of Cancer Research, London SM2 FNG, UK
| | - Simone Hettmer
- Division of Pediatric Hematology and Oncology, Department of Pediatric and Adolescent Medicine, University Medical Center Freiburg, University of Freiburg, 79106 Freiburg, Germany
- Spemann Graduate School of Biology and Medicine (SGBM), 79104 Freiburg, Germany
- Comprehensive Cancer Centre Freiburg (CCCF), University Medical Center Freiburg, 790106 Freiburg, Germany
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Xiao M, Wu CH, Meek G, Kelly B, Castillo DB, Young LEA, Martire S, Dhungel S, McCauley E, Saha P, Dube AL, Gentry MS, Banaszynski LA, Sun RC, Kikani CK. PASK links cellular energy metabolism with a mitotic self-renewal network to establish differentiation competence. eLife 2023; 12:e81717. [PMID: 37052079 PMCID: PMC10162801 DOI: 10.7554/elife.81717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 04/11/2023] [Indexed: 04/14/2023] Open
Abstract
Quiescent stem cells are activated in response to a mechanical or chemical injury to their tissue niche. Activated cells rapidly generate a heterogeneous progenitor population that regenerates the damaged tissues. While the transcriptional cadence that generates heterogeneity is known, the metabolic pathways influencing the transcriptional machinery to establish a heterogeneous progenitor population remains unclear. Here, we describe a novel pathway downstream of mitochondrial glutamine metabolism that confers stem cell heterogeneity and establishes differentiation competence by countering post-mitotic self-renewal machinery. We discovered that mitochondrial glutamine metabolism induces CBP/EP300-dependent acetylation of stem cell-specific kinase, PAS domain-containing kinase (PASK), resulting in its release from cytoplasmic granules and subsequent nuclear migration. In the nucleus, PASK catalytically outcompetes mitotic WDR5-anaphase-promoting complex/cyclosome (APC/C) interaction resulting in the loss of post-mitotic Pax7 expression and exit from self-renewal. In concordance with these findings, genetic or pharmacological inhibition of PASK or glutamine metabolism upregulated Pax7 expression, reduced stem cell heterogeneity, and blocked myogenesis in vitro and muscle regeneration in mice. These results explain a mechanism whereby stem cells co-opt the proliferative functions of glutamine metabolism to generate transcriptional heterogeneity and establish differentiation competence by countering the mitotic self-renewal network via nuclear PASK.
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Affiliation(s)
- Michael Xiao
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
- Weill Cornell/Rockefeller/Sloan Kettering Tri-Institutional MD-PhD ProgramNew YorkUnited States
| | - Chia-Hua Wu
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Graham Meek
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Brian Kelly
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Dara Buendia Castillo
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Lyndsay EA Young
- Molecular and Cellular Biochemistry, College of Medicine, University of KentuckyLexingtonUnited States
| | - Sara Martire
- Cecil H. and Ida Green Center for Reproductive Biology Sciences, Children’s Medical Center Research Institute, Department of Obstetrics & Gynecology, Hamon Center for Regenerative Science and Medicine at the University of Texas Southwestern Medical CenterDallasUnited States
| | - Sajina Dhungel
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Elizabeth McCauley
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
| | - Purbita Saha
- Cecil H. and Ida Green Center for Reproductive Biology Sciences, Children’s Medical Center Research Institute, Department of Obstetrics & Gynecology, Hamon Center for Regenerative Science and Medicine at the University of Texas Southwestern Medical CenterDallasUnited States
| | - Altair L Dube
- Cecil H. and Ida Green Center for Reproductive Biology Sciences, Children’s Medical Center Research Institute, Department of Obstetrics & Gynecology, Hamon Center for Regenerative Science and Medicine at the University of Texas Southwestern Medical CenterDallasUnited States
| | - Matthew S Gentry
- Molecular and Cellular Biochemistry, College of Medicine, University of KentuckyLexingtonUnited States
| | - Laura A Banaszynski
- Cecil H. and Ida Green Center for Reproductive Biology Sciences, Children’s Medical Center Research Institute, Department of Obstetrics & Gynecology, Hamon Center for Regenerative Science and Medicine at the University of Texas Southwestern Medical CenterDallasUnited States
| | - Ramon C Sun
- Molecular and Cellular Biochemistry, College of Medicine, University of KentuckyLexingtonUnited States
- Department of Neuroscience, College of Medicine, University of KentuckyLexingtonUnited States
| | - Chintan K Kikani
- Department of Biology, College of Arts and Sciences, University of Kentucky, Thomas Hunt Morgan BuildingLexingtonUnited States
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8
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Wiedner HJ, Torres EV, Blue RE, Tsai Y, Parker J, Giudice J. SET domain containing 2 (SETD2) influences metabolism and alternative splicing during myogenesis. FEBS J 2022; 289:6799-6816. [PMID: 35724320 PMCID: PMC9796740 DOI: 10.1111/febs.16553] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 05/13/2022] [Accepted: 06/10/2022] [Indexed: 01/14/2023]
Abstract
Epigenetic regulatory mechanisms are increasingly recognized as crucial determinants of cellular specification and differentiation. During muscle cell differentiation (myogenesis), extensive remodelling of histone acetylation and methylation occurs. Several of these histone modifications aid in the expression of muscle-specific genes and the silencing of genes that block lineage commitment. Therefore, the identification of new epigenetic regulatory mechanisms is of high interest. Still, the functional relevance of numerous histone modifications during myogenesis remain completely uncertain. In this study, we focus on the function of H3K36me3 and its epigenetic writer, SET domain containing 2 (SETD2), in the context of muscle cell differentiation. We first observed that SETD2 expression increases during myogenesis. Targeted depletion of SETD2 in undifferentiated (myoblasts) and differentiated (myotubes) muscle cells reduced H3K36me3 levels and induced profound changes in gene expression and slight alterations in alternative splicing, as determined by deep RNA-sequencing analysis. Enzymes that function in metabolic pathways were upregulated in response to SETD2 depletion. Furthermore, we demonstrated that upregulation of several glycolytic enzymes was associated with an increase in intracellular pyruvate levels in SETD2-depleted cells, indicating a novel role for SETD2 in metabolic programming during myogenesis. Together, our results provide new insight into the signalling pathways controlled by chromatin-modifying enzymes and their associated histone modifications during muscle cell differentiation.
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Affiliation(s)
- Hannah J. Wiedner
- Department of Cell Biology and PhysiologyThe University of North Carolina at Chapel HillUSA,Curriculum in Genetics and Molecular Biology (GMB)The University of North Carolina at Chapel HillUSA
| | - Eduardo V. Torres
- Department of Cell Biology and PhysiologyThe University of North Carolina at Chapel HillUSA
| | - R. Eric Blue
- Department of Cell Biology and PhysiologyThe University of North Carolina at Chapel HillUSA
| | - Yi‐Hsuan Tsai
- Lineberger Comprehensive Cancer CenterThe University of North Carolina at Chapel HillUSA
| | - Joel Parker
- Curriculum in Genetics and Molecular Biology (GMB)The University of North Carolina at Chapel HillUSA,Lineberger Comprehensive Cancer CenterThe University of North Carolina at Chapel HillUSA
| | - Jimena Giudice
- Department of Cell Biology and PhysiologyThe University of North Carolina at Chapel HillUSA,Curriculum in Genetics and Molecular Biology (GMB)The University of North Carolina at Chapel HillUSA,McAllister Heart Institute, School of MedicineThe University of North Carolina at Chapel HillUSA
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9
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Vicente-García C, Hernández-Camacho JD, Carvajal JJ. Regulation of myogenic gene expression. Exp Cell Res 2022; 419:113299. [DOI: 10.1016/j.yexcr.2022.113299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/19/2022] [Accepted: 07/25/2022] [Indexed: 12/22/2022]
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10
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Sosa P, Alcalde-Estévez E, Asenjo-Bueno A, Plaza P, Carrillo-López N, Olmos G, López-Ongil S, Ruiz-Torres MP. Aging-related hyperphosphatemia impairs myogenic differentiation and enhances fibrosis in skeletal muscle. J Cachexia Sarcopenia Muscle 2021; 12:1266-1279. [PMID: 34337906 PMCID: PMC8517361 DOI: 10.1002/jcsm.12750] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 05/24/2021] [Accepted: 06/08/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Hyperphosphatemia has been related to the development of sarcopenia in aging mice. We describe the intracellular mechanisms involved in the impairment of the myogenic differentiation promoted by hyperphosphatemia and analyse these mechanisms in the muscle from older mice. METHODS C2 C12 cells were grown in 2% horse serum in order to promote myogenic differentiation, in the presence or absence of 10 mM beta-glycerophosphate (BGP) for 7 days. Troponin T, paired box 7 (Pax-7), myogenic factor 5 (Myf5), myogenic differentiation 1 (MyoD), myogenin (MyoG), myocyte enhancer factor 2 (MEF2C), P300/CBP-associated factor (PCAF), histone deacetylase 1 (HDAC1), fibronectin, vimentin, and collagen I were analysed at 48, 72, and 168 h, by western blotting or by immunofluorescence staining visualized by confocal microscopy. Studies in mice were performed in 5- and 24-month-old C57BL6 mice. Three months before sacrifice, 21-month-old mice were fed with a standard diet or a low phosphate diet, containing 0.6% or 0.2% phosphate, respectively. Serum phosphate concentration was assessed by a colorimetric method and forelimb strength by a grip test. Fibrosis was observed in the tibialis anterior muscle by Sirius Red staining. In gastrocnemius muscle, MyoG, MEF2C, and fibronectin expressions were analysed by western blotting. RESULTS Cells differentiated in the presence of BGP showed near five times less expression of troponin T and kept higher levels of Pax-7 than control cells indicating a reduced myogenic differentiation. BGP reduced Myf5 about 50% and diminished MyoD transcriptional activity by increasing the expression of HDAC1 and reducing the expression of PCAF. Consequently, BGP reduced to 50% the expression of MyoG and MEF2C. A significant increase in the expression of fibrosis markers as collagen I, vimentin, and fibronectin was found in cells treated with BGP. In mice, serum phosphate (17.24 ± 0.77 mg/dL young; 23.23 ± 0.81 mg/dL old; 19.09 ± 0.75 mg/dL old with low phosphate diet) correlates negatively (r = -0.515, P = 0.001) with the muscular strength (3.13 ± 0.07 gf/g young; 1.70 ± 0.12 gf/g old; 2.10 ± 0.09 gf/g old with low phosphate diet) and with the expression of MyoG (r = -0.535, P = 0.007) and positively with the expression of fibronectin (r = 0.503, P = 0.001) in gastrocnemius muscle. The tibialis anterior muscle from old mice showed muscular fibrosis. Older mice fed with a low phosphate diet showed improved muscular parameters relative to control mice of similar age. CONCLUSIONS Hyperphosphatemia impairs myogenic differentiation, by inhibiting the transcriptional activity of MyoD, and enhances the expression of fibrotic genes in cultured myoblasts. Experiments carried out in older mice demonstrate a close relationship between age-related hyperphosphatemia and the decrease in the expression of myogenic factors and the increase in factors related to muscle fibrosis.
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Affiliation(s)
- Patricia Sosa
- Departamento de Biología de Sistemas, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Elena Alcalde-Estévez
- Departamento de Biología de Sistemas, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Ana Asenjo-Bueno
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Patricia Plaza
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Natalia Carrillo-López
- Bone and Mineral Research Unit, Hospital Universitario Central de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Universidad de Oviedo, Oviedo, Spain
| | - Gemma Olmos
- Departamento de Biología de Sistemas, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid, Spain
| | - Susana López-Ongil
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid, Spain
| | - María Piedad Ruiz-Torres
- Departamento de Biología de Sistemas, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid, Spain
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11
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Chen YJC, Dent SYR. Conservation and diversity of the eukaryotic SAGA coactivator complex across kingdoms. Epigenetics Chromatin 2021; 14:26. [PMID: 34112237 PMCID: PMC8194025 DOI: 10.1186/s13072-021-00402-x] [Citation(s) in RCA: 5] [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: 04/22/2021] [Accepted: 06/03/2021] [Indexed: 12/27/2022] Open
Abstract
The SAGA complex is an evolutionarily conserved transcriptional coactivator that regulates gene expression through its histone acetyltransferase and deubiquitylase activities, recognition of specific histone modifications, and interactions with transcription factors. Multiple lines of evidence indicate the existence of distinct variants of SAGA among organisms as well as within a species, permitting diverse functions to dynamically regulate cellular pathways. Our co-expression analysis of genes encoding human SAGA components showed enrichment in reproductive organs, brain tissues and the skeletal muscle, which corresponds to their established roles in developmental programs, emerging roles in neurodegenerative diseases, and understudied functions in specific cell types. SAGA subunits modulate growth, development and response to various stresses from yeast to plants and metazoans. In metazoans, SAGA further participates in the regulation of differentiation and maturation of both innate and adaptive immune cells, and is associated with initiation and progression of diseases including a broad range of cancers. The evolutionary conservation of SAGA highlights its indispensable role in eukaryotic life, thus deciphering the mechanisms of action of SAGA is key to understanding fundamental biological processes throughout evolution. To illuminate the diversity and conservation of this essential complex, here we discuss variations in composition, essentiality and co-expression of component genes, and its prominent functions across Fungi, Plantae and Animalia kingdoms.
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Affiliation(s)
- Ying-Jiun C Chen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA
- The Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sharon Y R Dent
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA.
- The Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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12
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The cooperation of cis-elements during M-cadherin promoter activation. Biochem J 2021; 478:911-926. [PMID: 33527978 DOI: 10.1042/bcj20200535] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 01/21/2021] [Accepted: 02/02/2021] [Indexed: 01/26/2023]
Abstract
M-cadherin is a skeletal muscle-specific transmembrane protein mediating the cell-cell adhesion of myoblasts during myogenesis. It is expressed in the proliferating satellite cells and highly induced by myogenic regulatory factors (MRFs) during terminal myogenic differentiation. Several conserved cis-elements, including 5 E-boxes, 2 GC boxes, and 1 conserved downstream element (CDE) were identified in the M-cadherin proximal promoter. We found that E-box-3 and -4 close to the transcription initiation site (TIS) mediated most of its transactivation by MyoD, the strongest myogenic MRF. Including of any one of the other E-boxes restored the full activation by MyoD, suggesting an essential collaboration between E-boxes. Stronger activation of M-cadherin promoter than that of muscle creatine kinase (MCK) by MyoD was observed regardless of culture conditions and the presence of E47. Furthermore, MyoD/E47 heterodimer and MyoD ∼ E47 fusion protein achieved similar levels of activation in differentiation medium (DM), suggesting high affinity of MyoD/E47 to E-boxes 3/4 under DM. We also found that GC boxes and CDE positively affected MyoD mediated activation. The CDE element was predicted to be the target of the chromatin-modifying factor Meis1/Pbx1 heterodimer. Knockdown of Pbx1 significantly reduced the expression level of M-cadherin, but increased that of N-cadherin. Using ChIP assay, we further found significant reduction in MyoD recruitment to M-cadherin promoter when CDE was deleted. Taken together, these observations suggest that the chromatin-modifying function of Pbx1/Meis1 is critical to M-cadherin promoter activation before MyoD is recruited to E-boxes to trigger transcription.
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13
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A long noncoding RNA, LncMyoD, modulates chromatin accessibility to regulate muscle stem cell myogenic lineage progression. Proc Natl Acad Sci U S A 2020; 117:32464-32475. [PMID: 33293420 PMCID: PMC7768704 DOI: 10.1073/pnas.2005868117] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Epigenetic regulations control the accessibility of transcription factors to their target regions. Modulation of chromatin accessibility determines which transcripts to be expressed and therefore, defines cell identity. Chromatin modulation during cell fate determination involves a complex regulatory network, yet the comprehensive view remains to be explored. Here, we provide a global view of chromatin accessibility during muscle stem cell activation. We identified a long noncoding RNA (lncRNA), LncMyoD, which regulates lineage determination and progression through modulating chromatin accessibility. Functional analysis showed that loss of LncMyoD strongly impairs reprogramming of fibroblasts into myogenic lineage and causes defects in muscle stem cell differentiation. Our findings provide an epigenetic mechanism for the regulation of muscle stem cell myogenic lineage progression by an lncRNA. Epigenetics regulation plays a critical role in determining cell identity by controlling the accessibility of lineage-specific regulatory regions. In muscle stem cells, epigenetic mechanisms of how chromatin accessibility is modulated during cell fate determination are not fully understood. Here, we identified a long noncoding RNA, LncMyoD, that functions as a chromatin modulator for myogenic lineage determination and progression. The depletion of LncMyoD in muscle stem cells led to the down-regulation of myogenic genes and defects in myogenic differentiation. LncMyoD exclusively binds with MyoD and not with other myogenic regulatory factors and promotes transactivation of target genes. The mechanistic study revealed that loss of LncMyoD prevents the establishment of a permissive chromatin environment at myogenic E-box–containing regions, therefore restricting the binding of MyoD. Furthermore, the depletion of LncMyoD strongly impairs the reprogramming of fibroblasts into the myogenic lineage. Taken together, our study shows that LncMyoD associates with MyoD and promotes myogenic gene expression through modulating MyoD accessibility to chromatin, thereby regulating myogenic lineage determination and progression.
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14
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Hernández-Hernández O, Ávila-Avilés RD, Hernández-Hernández JM. Chromatin Landscape During Skeletal Muscle Differentiation. Front Genet 2020; 11:578712. [PMID: 33193700 PMCID: PMC7530293 DOI: 10.3389/fgene.2020.578712] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/31/2020] [Indexed: 12/02/2022] Open
Abstract
Cellular commitment and differentiation involve highly coordinated mechanisms by which tissue-specific genes are activated while others are repressed. These mechanisms rely on the activity of specific transcription factors, chromatin remodeling enzymes, and higher-order chromatin organization in order to modulate transcriptional regulation on multiple cellular contexts. Tissue-specific transcription factors are key mediators of cell fate specification with the ability to reprogram cell types into different lineages. A classic example of a master transcription factor is the muscle specific factor MyoD, which belongs to the family of myogenic regulatory factors (MRFs). MRFs regulate cell fate determination and terminal differentiation of the myogenic precursors in a multistep process that eventually culminate with formation of muscle fibers. This developmental progression involves the activation and proliferation of muscle stem cells, commitment, and cell cycle exit and fusion of mononucleated myoblast to generate myotubes and myofibers. Although the epigenetics of muscle regeneration has been extensively addressed and discussed over the recent years, the influence of higher-order chromatin organization in skeletal muscle regeneration is still a field of development. In this review, we will focus on the epigenetic mechanisms modulating muscle gene expression and on the incipient work that addresses three-dimensional genome architecture and its influence in cell fate determination and differentiation to achieve skeletal myogenesis. We will visit known alterations of genome organization mediated by chromosomal fusions giving rise to novel regulatory landscapes, enhancing oncogenic activation in muscle, such as alveolar rhabdomyosarcomas (ARMS).
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Affiliation(s)
- Oscar Hernández-Hernández
- Laboratory of Genomic Medicine, Department of Genetics, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Rodolfo Daniel Ávila-Avilés
- Laboratory of Epigenetics of Skeletal Muscle Regeneration, Department of Genetics and Molecular Biology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
| | - J Manuel Hernández-Hernández
- Laboratory of Epigenetics of Skeletal Muscle Regeneration, Department of Genetics and Molecular Biology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
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15
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Chopra A, Cho WC, Willmore WG, Biggar KK. Hypoxia-Inducible Lysine Methyltransferases: G9a and GLP Hypoxic Regulation, Non-histone Substrate Modification, and Pathological Relevance. Front Genet 2020; 11:579636. [PMID: 33088284 PMCID: PMC7495024 DOI: 10.3389/fgene.2020.579636] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 08/13/2020] [Indexed: 12/29/2022] Open
Abstract
Oxygen sensing is inherent among most animal lifeforms and is critical for organism survival. Oxygen sensing mechanisms collectively trigger cellular and physiological responses that enable adaption to a reduction in ideal oxygen levels. The major mechanism by which oxygen-responsive changes in the transcriptome occur are mediated through the hypoxia-inducible factor (HIF) pathway. Upon reduced oxygen conditions, HIF activates hypoxia-responsive gene expression programs. However, under normal oxygen conditions, the activity of HIF is regularly suppressed by cellular oxygen sensors; prolyl-4 and asparaginyl hydroxylases. Recently, these oxygen sensors have also been found to suppress the function of two lysine methyltransferases, G9a and G9a-like protein (GLP). In this manner, the methyltransferase activity of G9a and GLP are hypoxia-inducible and thus present a new avenue of low-oxygen signaling. Furthermore, G9a and GLP elicit lysine methylation on a wide variety of non-histone proteins, many of which are known to be regulated by hypoxia. In this article we aim to review the effects of oxygen on G9a and GLP function, non-histone methylation events inflicted by these methyltransferases, and the clinical relevance of these enzymes in cancer.
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Affiliation(s)
- Anand Chopra
- Institute of Biochemistry, Carleton University, Ottawa, ON, Canada.,Department of Biology, Carleton University, Ottawa, ON, Canada
| | - William C Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, China
| | - William G Willmore
- Institute of Biochemistry, Carleton University, Ottawa, ON, Canada.,Department of Biology, Carleton University, Ottawa, ON, Canada
| | - Kyle K Biggar
- Institute of Biochemistry, Carleton University, Ottawa, ON, Canada.,Department of Biology, Carleton University, Ottawa, ON, Canada
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16
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Koutelou E, Farria AT, Dent SYR. Complex functions of Gcn5 and Pcaf in development and disease. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2020; 1864:194609. [PMID: 32730897 DOI: 10.1016/j.bbagrm.2020.194609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 12/12/2022]
Abstract
A wealth of biochemical and cellular data, accumulated over several years by multiple groups, has provided a great degree of insight into the molecular mechanisms of actions of GCN5 and PCAF in gene activation. Studies of these lysine acetyltransferases (KATs) in vitro, in cultured cells, have revealed general mechanisms for their recruitment by sequence-specific binding factors and their molecular functions as transcriptional co-activators. Genetic studies indicate that GCN5 and PCAF are involved in multiple developmental processes in vertebrates, yet our understanding of their molecular functions in these contexts remains somewhat rudimentary. Understanding the functions of GCN5/PCAF in developmental processes provides clues to the roles of these KATs in disease states. Here we will review what is currently known about the developmental roles of GCN5 and PCAF, as well as emerging role of these KATs in oncogenesis.
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Affiliation(s)
- Evangelia Koutelou
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Science Park, Smithville, TX 78957, United States of America; Center for Cancer Epigenetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America
| | - Aimee T Farria
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Science Park, Smithville, TX 78957, United States of America; Center for Cancer Epigenetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America
| | - Sharon Y R Dent
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Science Park, Smithville, TX 78957, United States of America; Center for Cancer Epigenetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America.
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17
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PCAF Involvement in Lamin A/C-HDAC2 Interplay during the Early Phase of Muscle Differentiation. Cells 2020; 9:cells9071735. [PMID: 32698523 PMCID: PMC7409167 DOI: 10.3390/cells9071735] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/09/2020] [Accepted: 07/17/2020] [Indexed: 02/07/2023] Open
Abstract
Lamin A/C has been implicated in the epigenetic regulation of muscle gene expression through dynamic interaction with chromatin domains and epigenetic enzymes. We previously showed that lamin A/C interacts with histone deacetylase 2 (HDAC2). In this study, we deepened the relevance and regulation of lamin A/C-HDAC2 interaction in human muscle cells. We present evidence that HDAC2 binding to lamina A/C is related to HDAC2 acetylation on lysine 75 and expression of p300-CBP associated factor (PCAF), an acetyltransferase known to acetylate HDAC2. Our findings show that lamin A and farnesylated prelamin A promote PCAF recruitment to the nuclear lamina and lamin A/C binding in human myoblasts committed to myogenic differentiation, while protein interaction is decreased in differentiating myotubes. Interestingly, PCAF translocation to the nuclear envelope, as well as lamin A/C-PCAF interaction, are reduced by transient expression of lamin A mutated forms causing Emery Dreifuss muscular dystrophy. Consistent with this observation, lamin A/C interaction with both PCAF and HDAC2 is significantly reduced in Emery-Dreifuss muscular dystrophy myoblasts. Overall, these results support the view that, by recruiting PCAF and HDAC2 in a molecular platform, lamin A/C might contribute to regulate their epigenetic activity required in the early phase of muscle differentiation.
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18
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PRMT1 activates myogenin transcription via MyoD arginine methylation at R121. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2019; 1862:194442. [DOI: 10.1016/j.bbagrm.2019.194442] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 09/28/2019] [Accepted: 10/04/2019] [Indexed: 11/23/2022]
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19
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Bianchi A, Manti PG, Lucini F, Lanzuolo C. Mechanotransduction, nuclear architecture and epigenetics in Emery Dreifuss Muscular Dystrophy: tous pour un, un pour tous. Nucleus 2019; 9:276-290. [PMID: 29619865 PMCID: PMC5973142 DOI: 10.1080/19491034.2018.1460044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The alteration of the several roles that Lamin A/C plays in the mammalian cell leads to a broad spectrum of pathologies that – all together – are named laminopathies. Among those, the Emery Dreifuss Muscular Dystrophy (EDMD) is of particular interest as, despite the several known mutations of Lamin A/C, the genotype–phenotype correlation still remains poorly understood; this suggests that the epigenetic background of patients might play an important role during the time course of the disease. Historically, both a mechanical role of Lamin A/C and a regulative one have been suggested as the driving force of laminopathies; however, those two hypotheses are not mutually exclusive. Recent scientific evidence shows that Lamin A/C sustains the correct gene expression at the epigenetic level thanks to the Lamina Associated Domains (LADs) reorganization and the crosstalk with the Polycomb Group of Proteins (PcG). Furthermore, the PcG-dependent histone mark H3K27me3 increases under mechanical stress, finally pointing out the link between the mechano-properties of the nuclear lamina and epigenetics. Here, we summarize the emerging mechanisms that could explain the high variability seen in Emery Dreifuss muscular dystrophy.
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Affiliation(s)
- Andrea Bianchi
- a CNR Institute of Cell Biology and Neurobiology, Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Santa Lucia , Rome , Italy.,b Istituto Nazionale Genetica Molecolare Romeo ed Enrica Invernizzi , Milan , Italy
| | | | - Federica Lucini
- b Istituto Nazionale Genetica Molecolare Romeo ed Enrica Invernizzi , Milan , Italy
| | - Chiara Lanzuolo
- a CNR Institute of Cell Biology and Neurobiology, Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Santa Lucia , Rome , Italy.,b Istituto Nazionale Genetica Molecolare Romeo ed Enrica Invernizzi , Milan , Italy.,c Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Santa Lucia , Rome , Italy
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20
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Breuls N, Giacomazzi G, Sampaolesi M. (Epi)genetic Modifications in Myogenic Stem Cells: From Novel Insights to Therapeutic Perspectives. Cells 2019; 8:cells8050429. [PMID: 31075875 PMCID: PMC6562881 DOI: 10.3390/cells8050429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 12/17/2022] Open
Abstract
The skeletal muscle is considered to be an ideal target for stem cell therapy as it has an inherent regenerative capacity. Upon injury, the satellite cells, muscle stem cells that reside under the basal lamina of the myofibres, start to differentiate in order to reconstitute the myofibres while maintaining the initial stem cell pool. In recent years, it has become more and more evident that epigenetic mechanisms such as histon modifications, DNA methylations and microRNA modulations play a pivatol role in this differentiation process. By understanding the mechanisms behind myogenesis, researchers are able to use this knowledge to enhance the differentiation and engraftment potential of different muscle stem cells. Besides manipulation on an epigenetic level, recent advances in the field of genome-engineering allow site-specific modifications in the genome of these stem cells. Combining epigenetic control of the stem cell fate with the ability to site-specifically correct mutations or add genes for further cell control, can increase the use of stem cells as treatment of muscular dystrophies drastically. In this review, we will discuss the advances that have been made in genome-engineering and the epigenetic regulation of muscle stem cells and how this knowledge can help to get stem cell therapy to its full potential.
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Affiliation(s)
- Natacha Breuls
- Translational Cardiomyology Lab, Department of Development and Regeneration, Stem Cell Institute Leuven, 3000 KU Leuven, Belgium.
| | - Giorgia Giacomazzi
- Translational Cardiomyology Lab, Department of Development and Regeneration, Stem Cell Institute Leuven, 3000 KU Leuven, Belgium.
| | - Maurilio Sampaolesi
- Translational Cardiomyology Lab, Department of Development and Regeneration, Stem Cell Institute Leuven, 3000 KU Leuven, Belgium.
- Human Anatomy Unit, Department of Public Health, Experimental and Forensic Medicine, and Interuniversity Institute of Myology, University of Pavia, 27100 Pavia, Italy.
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21
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Hitachi K, Nakatani M, Takasaki A, Ouchi Y, Uezumi A, Ageta H, Inagaki H, Kurahashi H, Tsuchida K. Myogenin promoter-associated lncRNA Myoparr is essential for myogenic differentiation. EMBO Rep 2019; 20:embr.201847468. [PMID: 30622218 DOI: 10.15252/embr.201847468] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 12/19/2022] Open
Abstract
Promoter-associated long non-coding RNAs (lncRNAs) regulate the expression of adjacent genes; however, precise roles of these lncRNAs in skeletal muscle remain largely unknown. Here, we characterize a promoter-associated lncRNA, Myoparr, in myogenic differentiation and muscle disorders. Myoparr is expressed from the promoter region of the mouse and human myogenin gene, one of the key myogenic transcription factors. We show that Myoparr is essential both for the specification of myoblasts by activating neighboring myogenin expression and for myoblast cell cycle withdrawal by activating myogenic microRNA expression. Mechanistically, Myoparr interacts with Ddx17, a transcriptional coactivator of MyoD, and regulates the association between Ddx17 and the histone acetyltransferase PCAF Myoparr also promotes skeletal muscle atrophy caused by denervation, and knockdown of Myoparr rescues muscle wasting in mice. Our findings demonstrate that Myoparr is a novel key regulator of muscle development and suggest that Myoparr is a potential therapeutic target for neurogenic atrophy in humans.
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Affiliation(s)
- Keisuke Hitachi
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science (ICMS), Fujita Health University, Toyoake, Japan
| | - Masashi Nakatani
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science (ICMS), Fujita Health University, Toyoake, Japan
| | - Akihiko Takasaki
- Department of Medical Technology, School of Health Sciences, Gifu University of Medical Science, Seki, Japan
| | - Yuya Ouchi
- Genome and Transcriptome Analysis Center, Fujita Health University, Toyoake, Japan
| | - Akiyoshi Uezumi
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science (ICMS), Fujita Health University, Toyoake, Japan
| | - Hiroshi Ageta
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science (ICMS), Fujita Health University, Toyoake, Japan
| | - Hidehito Inagaki
- Genome and Transcriptome Analysis Center, Fujita Health University, Toyoake, Japan
| | - Hiroki Kurahashi
- Genome and Transcriptome Analysis Center, Fujita Health University, Toyoake, Japan
| | - Kunihiro Tsuchida
- Division for Therapies against Intractable Diseases, Institute for Comprehensive Medical Science (ICMS), Fujita Health University, Toyoake, Japan
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22
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Savoia M, Cencioni C, Mori M, Atlante S, Zaccagnini G, Devanna P, Di Marcotullio L, Botta B, Martelli F, Zeiher AM, Pontecorvi A, Farsetti A, Spallotta F, Gaetano C. P300/CBP‐associated factor regulates transcription and function of isocitrate dehydrogenase 2 during muscle differentiation. FASEB J 2018; 33:4107-4123. [DOI: 10.1096/fj.201800788r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Matteo Savoia
- Division of Cardiovascular EpigeneticsDepartment of CardiologyGoethe University Frankfurt am Main Germany
| | - Chiara Cencioni
- Internal Medicine Clinic IIIDepartment of CardiologyGoethe University Frankfurt am Main Germany
| | - Mattia Mori
- Department of Biotechnology, Chemistry, and PharmacyUniversity of Siena Siena Italy
| | - Sandra Atlante
- Division of Cardiovascular EpigeneticsDepartment of CardiologyGoethe University Frankfurt am Main Germany
| | - Germana Zaccagnini
- Molecular Cardiology LaboratoryIstituto di Ricovero e Cura a Carattere Scientifico Policlinico San Donato, San Donato Milanese Milan Italy
| | - Paolo Devanna
- Neurogenetics of Vocal Communication GroupMax Plank Institute for Psycholinguistics Nijmegen The Netherlands
| | - Lucia Di Marcotullio
- Department of Molecular MedicineSapienza University of Rome Rome Italy
- Istituto Pasteur–Fondazione Cenci BolognettiUniversity La Sapienza Rome Italy
| | - Bruno Botta
- Dipartimento di Chimica e Tecnologie del FarmacoSapienza University of Rome Rome Italy
| | - Fabio Martelli
- Molecular Cardiology LaboratoryIstituto di Ricovero e Cura a Carattere Scientifico Policlinico San Donato, San Donato Milanese Milan Italy
| | - Andreas M. Zeiher
- Internal Medicine Clinic IIIDepartment of CardiologyGoethe University Frankfurt am Main Germany
| | - Alfredo Pontecorvi
- Institute of Medical PathologyUniversità Cattolica del Sacro Cuore di Roma Rome Italy
- Fondazione Policlinico Universitario A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico Rome Italy
| | - Antonella Farsetti
- National Research CouncilInstitute of Cell Biology and Neurobiology, Monterotondo Rome Italy
| | - Francesco Spallotta
- Division of Cardiovascular EpigeneticsDepartment of CardiologyGoethe University Frankfurt am Main Germany
| | - Carlo Gaetano
- Laboratorio di EpigeneticaIstituti Clinici Scientifici Maugeri Pavia Italy
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23
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Epigenetic Erosion in Adult Stem Cells: Drivers and Passengers of Aging. Cells 2018; 7:cells7120237. [PMID: 30501028 PMCID: PMC6316114 DOI: 10.3390/cells7120237] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 11/22/2018] [Accepted: 11/26/2018] [Indexed: 02/06/2023] Open
Abstract
In complex organisms, stem cells are key for tissue maintenance and regeneration. Adult stem cells replenish continuously dividing tissues of the epithelial and connective types, whereas in non-growing muscle and nervous tissues, they are mainly activated upon injury or stress. In addition to replacing deteriorated cells, adult stem cells have to prevent their exhaustion by self-renewal. There is mounting evidence that both differentiation and self-renewal are impaired upon aging, leading to tissue degeneration and functional decline. Understanding the molecular pathways that become deregulate in old stem cells is crucial to counteract aging-associated tissue impairment. In this review, we focus on the epigenetic mechanisms governing the transition between quiescent and active states, as well as the decision between self-renewal and differentiation in three different stem cell types, i.e., spermatogonial stem cells, hematopoietic stem cells, and muscle stem cells. We discuss the epigenetic events that channel stem cell fate decisions, how this epigenetic regulation is altered with age, and how this can lead to tissue dysfunction and disease. Finally, we provide short prospects of strategies to preserve stem cell function and thus promote healthy aging.
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Nguyen TH, Barr FG. Therapeutic Approaches Targeting PAX3-FOXO1 and Its Regulatory and Transcriptional Pathways in Rhabdomyosarcoma. Molecules 2018; 23:E2798. [PMID: 30373318 PMCID: PMC6278278 DOI: 10.3390/molecules23112798] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/24/2018] [Accepted: 10/26/2018] [Indexed: 02/06/2023] Open
Abstract
Rhabdomyosarcoma (RMS) is a family of soft tissue cancers that are related to the skeletal muscle lineage and predominantly occur in children and young adults. A specific chromosomal translocation t(2;13)(q35;q14) that gives rise to the chimeric oncogenic transcription factor PAX3-FOXO1 has been identified as a hallmark of the aggressive alveolar subtype of RMS. PAX3-FOXO1 cooperates with additional molecular changes to promote oncogenic transformation and tumorigenesis in various human and murine models. Its expression is generally restricted to RMS tumor cells, thus providing a very specific target for therapeutic approaches for these RMS tumors. In this article, we review the recent understanding of PAX3-FOXO1 as a transcription factor in the pathogenesis of this cancer and discuss recent developments to target this oncoprotein for treatment of RMS.
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Affiliation(s)
| | - Frederic G. Barr
- Laboratory of Pathology, National Cancer Institute, 10 Center Drive, Bethesda, MD 20892, USA;
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Mongelli A, Gaetano C. Controversial Impact of Sirtuins in Chronic Non-Transmissible Diseases and Rehabilitation Medicine. Int J Mol Sci 2018; 19:ijms19103080. [PMID: 30304806 PMCID: PMC6213918 DOI: 10.3390/ijms19103080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 09/29/2018] [Indexed: 12/15/2022] Open
Abstract
A large body of evidence reports about the positive effects of physical activity in pathophysiological conditions associated with aging. Physical exercise, alone or in combination with other medical therapies, unquestionably causes reduction of symptoms in chronic non-transmissible diseases often leading to significant amelioration or complete healing. The molecular basis of this exciting outcome—however, remain largely obscure. Epigenetics, exploring at the interface between environmental signals and the remodeling of chromatin structure, promises to shed light on this intriguing matter possibly contributing to the identification of novel therapeutic targets. In this review, we shall focalize on the role of sirtuins (Sirts) a class III histone deacetylases (HDACs), which function has been frequently associated, often with a controversial role, to the pathogenesis of aging-associated pathophysiological conditions, including cancer, cardiovascular, muscular, neurodegenerative, bones and respiratory diseases. Numerous studies, in fact, demonstrate that Sirt-dependent pathways are activated upon physical and cognitive exercises linking mitochondrial function, DNA structure remodeling and gene expression regulation to designed medical therapies leading to tangible beneficial outcomes. However, in similar conditions, other studies assign to sirtuins a negative pathophysiological role. In spite of this controversial effect, it is doubtless that studying sirtuins in chronic diseases might lead to an unprecedented improvement of life quality in the elderly.
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Affiliation(s)
| | - Carlo Gaetano
- ICS Maugeri S.p.A., SB, via Maugeri 10, 27100 Pavia, Italy.
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Sangwan R, Rajan R, Mandal PK. HDAC as onco target: Reviewing the synthetic approaches with SAR study of their inhibitors. Eur J Med Chem 2018; 158:620-706. [DOI: 10.1016/j.ejmech.2018.08.073] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 01/09/2018] [Accepted: 08/26/2018] [Indexed: 02/06/2023]
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Kao SH, Wu HT, Wu KJ. Ubiquitination by HUWE1 in tumorigenesis and beyond. J Biomed Sci 2018; 25:67. [PMID: 30176860 PMCID: PMC6122628 DOI: 10.1186/s12929-018-0470-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 08/28/2018] [Indexed: 01/19/2023] Open
Abstract
Ubiquitination modulates a large repertoire of cellular functions and thus, dysregulation of the ubiquitin system results in multiple human diseases, including cancer. Ubiquitination requires an E3 ligase, which is responsible for substrate recognition and conferring specificity to ubiquitination. HUWE1 is a multifaceted HECT domain-containing ubiquitin E3 ligase, which catalyzes both mono-ubiquitination and K6-, K48- and K63-linked poly-ubiquitination of its substrates. Many of the substrates of HUWE1 play a crucial role in maintaining the homeostasis of cellular development. Not surprisingly, dysregulation of HUWE1 is associated with tumorigenesis and metastasis. HUWE1 is frequently overexpressed in solid tumors, but can be downregulated in brain tumors, suggesting that HUWE1 may possess differing cell-specific functions depending on the downstream targets of HUWE1. This review introduces some important discoveries of the HUWE1 substrates, including those controlling proliferation and differentiation, apoptosis, DNA repair, and responses to stress. In addition, we review the signaling pathways HUWE1 participates in and obstacles to the identification of HUWE1 substrates. We also discuss up-to-date potential therapeutic designs using small molecules or ubiquitin variants (UbV) against the HUWE1 activity. These molecular advances provide a translational platform for future bench-to-bed studies. HUWE1 is a critical ubiquitination modulator during the tumor progression and may serve as a possible therapeutic target for cancer treatment.
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Affiliation(s)
- Shih-Han Kao
- Research Center for Tumor Medical Science, China Medical University, No. 91, Hseuh-Shih Rd, Taichung, 40402, Taiwan. .,Drug Development Center, China Medical University, Taichung, 40402, Taiwan.
| | - Han-Tsang Wu
- Department of Cell and Tissue Engineering, Changhua Christian Hospital, Changhua City, 500, Taiwan
| | - Kou-Juey Wu
- Research Center for Tumor Medical Science, China Medical University, No. 91, Hseuh-Shih Rd, Taichung, 40402, Taiwan. .,Drug Development Center, China Medical University, Taichung, 40402, Taiwan. .,Institute of New Drug Development, Taichung, 40402, Taiwan. .,Graduate Institutes of Biomedical Sciences, China Medical University, Taichung, 40402, Taiwan. .,Departmet of Medical Research, China Medical University Hospital, Taichung, 40402, Taiwan.
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Sartorelli V, Puri PL. Shaping Gene Expression by Landscaping Chromatin Architecture: Lessons from a Master. Mol Cell 2018; 71:375-388. [PMID: 29887393 DOI: 10.1016/j.molcel.2018.04.025] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 04/05/2018] [Accepted: 04/27/2018] [Indexed: 01/14/2023]
Abstract
Since its discovery as a skeletal muscle-specific transcription factor able to reprogram somatic cells into differentiated myofibers, MyoD has provided an instructive model to understand how transcription factors regulate gene expression. Reciprocally, studies of other transcriptional regulators have provided testable hypotheses to further understand how MyoD activates transcription. Using MyoD as a reference, in this review, we discuss the similarities and differences in the regulatory mechanisms employed by tissue-specific transcription factors to access DNA and regulate gene expression by cooperatively shaping the chromatin landscape within the context of cellular differentiation.
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Affiliation(s)
- Vittorio Sartorelli
- Laboratory of Muscle Stem Cells & Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), NIH, Bethesda, MD 20892, USA.
| | - Pier Lorenzo Puri
- Sanford Burnham Prebys Medical Discovery Institute, Development, Aging and Regeneration Program, La Jolla, CA 92037, USA; Epigenetics and Regenerative Medicine, IRCCS Fondazione Santa Lucia, Rome, Italy.
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Sumoylation of histone deacetylase 1 regulates MyoD signaling during myogenesis. Exp Mol Med 2018; 50:e427. [PMID: 29328071 PMCID: PMC5799798 DOI: 10.1038/emm.2017.236] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 02/07/2023] Open
Abstract
Sumoylation, the conjugation of a small ubiquitin-like modifier (SUMO) protein to a target, has diverse cellular effects. However, the functional roles of the SUMO modification during myogenesis have not been fully elucidated. Here, we report that basal sumoylation of histone deacetylase 1 (HDAC1) enhances the deacetylation of MyoD in undifferentiated myoblasts, whereas further sumoylation of HDAC1 contributes to switching its binding partners from MyoD to Rb to induce myocyte differentiation. Differentiation in C2C12 skeletal myoblasts induced new immunoblot bands above HDAC1 that were gradually enhanced during differentiation. Using SUMO inhibitors and sumoylation assays, we showed that the upper band was caused by sumoylation of HDAC1 during differentiation. Basal deacetylase activity was not altered in the SUMO modification-resistant mutant HDAC1 K444/476R (HDAC1 2R). Either differentiation or transfection of SUMO1 increased HDAC1 activity that was attenuated in HDAC1 2R. Furthermore, HDAC1 2R failed to deacetylate MyoD. Binding of HDAC1 to MyoD was attenuated by K444/476R. Binding of HDAC1 to MyoD was gradually reduced after 2 days of differentiation. Transfection of SUMO1 induced dissociation of HDAC1 from MyoD but potentiated its binding to Rb. SUMO1 transfection further attenuated HDAC1-induced inhibition of muscle creatine kinase luciferase activity that was reversed in HDAC1 2R. HDAC1 2R failed to inhibit myogenesis and muscle gene expression. In conclusion, HDAC1 sumoylation plays a dual role in MyoD signaling: enhancement of HDAC1 deacetylation of MyoD in the basally sumoylated state of undifferentiated myoblasts and dissociation of HDAC1 from MyoD during myogenesis.
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Abstract
Rhabdomyosarcoma is a mesenchymal malignancy associated with the skeletal muscle lineage and is also the most common pediatric soft tissue cancer. Between the two pediatric subtypes, embryonal and alveolar rhabdomyosarcoma, the alveolar subtype is generally more aggressive and high-risk. Despite intensive multimodal therapy, patients with high-risk rhabdomyosarcoma continue to have poor prognosis. In this chapter we address the mechanisms underlying the dysregulation of myogenesis in rhabdomyosarcoma. We specifically focus on recently identified signaling pathways that function to inhibit myogenesis and how similar functions have been shown to overlap in rhabdomyosarcoma, potentially contributing to the disease.
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Affiliation(s)
- Peter Y Yu
- Arthur G. James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, United States; College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Denis C Guttridge
- Arthur G. James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, United States; The Ohio State University, Columbus, OH, United States.
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Dent JR, Martins VF, Svensson K, LaBarge SA, Schlenk NC, Esparza MC, Buckner EH, Meyer GA, Hamilton DL, Schenk S, Philp A. Muscle-specific knockout of general control of amino acid synthesis 5 (GCN5) does not enhance basal or endurance exercise-induced mitochondrial adaptation. Mol Metab 2017; 6:1574-1584. [PMID: 29111103 PMCID: PMC5699915 DOI: 10.1016/j.molmet.2017.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 09/29/2017] [Accepted: 10/10/2017] [Indexed: 12/17/2022] Open
Abstract
Objective Lysine acetylation is an important post-translational modification that regulates metabolic function in skeletal muscle. The acetyltransferase, general control of amino acid synthesis 5 (GCN5), has been proposed as a regulator of mitochondrial biogenesis via its inhibitory action on peroxisome proliferator activated receptor-γ coactivator-1α (PGC-1α). However, the specific contribution of GCN5 to skeletal muscle metabolism and mitochondrial adaptations to endurance exercise in vivo remain to be defined. We aimed to determine whether loss of GCN5 in skeletal muscle enhances mitochondrial density and function, and the adaptive response to endurance exercise training. Methods We used Cre-LoxP methodology to generate mice with muscle-specific knockout of GCN5 (mKO) and floxed, wildtype (WT) littermates. We measured whole-body energy expenditure, as well as markers of mitochondrial density, biogenesis, and function in skeletal muscle from sedentary mice, and mice that performed 20 days of voluntary endurance exercise training. Results Despite successful knockdown of GCN5 activity in skeletal muscle of mKO mice, whole-body energy expenditure as well as skeletal muscle mitochondrial abundance and maximal respiratory capacity were comparable between mKO and WT mice. Further, there were no genotype differences in endurance exercise-mediated mitochondrial biogenesis or increases in PGC-1α protein content. Conclusion These results demonstrate that loss of GCN5 in vivo does not promote metabolic remodeling in mouse skeletal muscle. Development of a novel muscle-specific GCN5 knockout (mKO) mouse model. GCN5 mKO does not affect body composition or 24 h whole-body metabolism. GCN5 mKO mice do not exhibit changes in basal mitochondrial abundance or respiratory capacity. Exercise-induced mitochondrial biogenesis in skeletal muscle is not enhanced in GCN5 mKO mice.
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Affiliation(s)
- Jessica R Dent
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, UK
| | - Vitor F Martins
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA; Biomedical Sciences Graduate Program, University of California, La Jolla, San Diego, CA, USA
| | - Kristoffer Svensson
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA
| | - Samuel A LaBarge
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA
| | - Noah C Schlenk
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA
| | - Mary C Esparza
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA
| | - Elisa H Buckner
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA
| | - Gretchen A Meyer
- Program in Physical Therapy, Washington University School of Medicine, St Louis, MO, USA
| | | | - Simon Schenk
- Department of Orthopaedic Surgery, University of California, La Jolla, San Diego, CA, USA; Biomedical Sciences Graduate Program, University of California, La Jolla, San Diego, CA, USA.
| | - Andrew Philp
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, UK.
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Perearnau A, Orlando S, Islam ABMMK, Gallastegui E, Martínez J, Jordan A, Bigas A, Aligué R, Pujol MJ, Bachs O. p27Kip1, PCAF and PAX5 cooperate in the transcriptional regulation of specific target genes. Nucleic Acids Res 2017; 45:5086-5099. [PMID: 28158851 PMCID: PMC5435914 DOI: 10.1093/nar/gkx075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 01/26/2017] [Indexed: 12/13/2022] Open
Abstract
The cyclin-dependent kinase inhibitor p27Kip1 (p27) also behaves as a transcriptional repressor. Data showing that the p300/CBP-associated factor (PCAF) acetylates p27 inducing its degradation suggested that PCAF and p27 could collaborate in the regulation of transcription. However, this possibility remained to be explored. We analyzed here the transcriptional programs regulated by PCAF and p27 in the colon cancer cell line HCT116 by chromatin immunoprecipitation sequencing (ChIP-seq). We identified 269 protein-encoding genes that contain both p27 and PCAF binding sites being the majority of these sites different for PCAF and p27. PCAF or p27 knock down revealed that both regulate the expression of these genes, PCAF as an activator and p27 as a repressor. The double knock down of PCAF and p27 strongly reduced their expression indicating that the activating role of PCAF overrides the repressive effect of p27. We also observed that the transcription factor Pax5 interacts with both p27 and PCAF and that the knock down of Pax5 induces the expression of p27/PCAF target genes indicating that it also participates in the transcriptional regulation mediated by p27/PCAF. In summary, we report here a previously unknown mechanism of transcriptional regulation mediated by p27, Pax5 and PCAF.
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Affiliation(s)
- Anna Perearnau
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Serena Orlando
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Abul B M M K Islam
- Department of Genetic Engineering and Biotechnology University of Dhaka, Dhaka 1000, Bangladesh
| | - Edurne Gallastegui
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Jonatan Martínez
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Albert Jordan
- Department of Molecular Genomics, Molecular Biology Institute of Barcelona (IBMB), Consejo Superior de Investigaciones Científicas (CSIC), 08029 Barcelona, Spain
| | - Anna Bigas
- Program in Cancer Research, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), CIBERONC, 08003 Barcelona, Spain
| | - Rosa Aligué
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Maria Jesús Pujol
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
| | - Oriol Bachs
- Department of Biomedical Sciences, University of Barcelona-IDIBAPS, CIBERONC, 08036 Barcelona, Spain
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Roberts TC, Etxaniz U, Dall'Agnese A, Wu SY, Chiang CM, Brennan PE, Wood MJA, Puri PL. BRD3 and BRD4 BET Bromodomain Proteins Differentially Regulate Skeletal Myogenesis. Sci Rep 2017; 7:6153. [PMID: 28733670 PMCID: PMC5522382 DOI: 10.1038/s41598-017-06483-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 06/14/2017] [Indexed: 12/22/2022] Open
Abstract
Myogenic differentiation proceeds through a highly coordinated cascade of gene activation that necessitates epigenomic changes in chromatin structure. Using a screen of small molecule epigenetic probes we identified three compounds which inhibited myogenic differentiation in C2C12 myoblasts; (+)-JQ1, PFI-1, and Bromosporine. These molecules target Bromodomain and Extra Terminal domain (BET) proteins, which are epigenetic readers of acetylated histone lysine tail residues. BETi-mediated anti-myogenic effects were also observed in a model of MYOD1-mediated myogenic conversion of human fibroblasts, and in primary mouse and human myoblasts. All three BET proteins BRD2, BRD3 and BRD4 exhibited distinct and dynamic patterns of protein expression over the course of differentiation without concomitant changes in mRNA levels, suggesting that BET proteins are regulated at the post-transcriptional level. Specific BET protein knockdown by RNA interference revealed that BRD4 was required for myogenic differentiation, whereas BRD3 down-regulation resulted in enhanced myogenic differentiation. ChIP experiments revealed a preferential binding of BRD4 to the Myog promoter during C2C12 myoblast differentiation, co-incident with increased levels of H3K27 acetylation. These results have identified an essential role for BET proteins in the regulation of skeletal myogenesis, and assign distinct functions to BRD3 and BRD4.
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Affiliation(s)
- Thomas C Roberts
- Sanford Burnham Prebys Medical Discovery Institute, Development, Aging and Regeneration Program, La Jolla, CA, 92037, USA. .,Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK.
| | - Usue Etxaniz
- Sanford Burnham Prebys Medical Discovery Institute, Development, Aging and Regeneration Program, La Jolla, CA, 92037, USA
| | - Alessandra Dall'Agnese
- Sanford Burnham Prebys Medical Discovery Institute, Development, Aging and Regeneration Program, La Jolla, CA, 92037, USA
| | - Shwu-Yuan Wu
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA.,Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA
| | - Cheng-Ming Chiang
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA.,Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA.,Department of Pharmacology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA
| | - Paul E Brennan
- Structural Genomics Consortium and Target Discovery Institute, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Matthew J A Wood
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, OX1 3QX, UK
| | - Pier Lorenzo Puri
- Sanford Burnham Prebys Medical Discovery Institute, Development, Aging and Regeneration Program, La Jolla, CA, 92037, USA. .,IRCCS Fondazione Santa Lucia, Rome, Italy.
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Abstract
BACKGROUND: Skeletal muscle atrophy during aging, a process known as sarcopenia, is associated with muscle weakness, frailty, and the loss of independence in older adults. The mechanisms contributing to sarcopenia are not totally understood, but muscle fiber loss due to apoptosis, reduced stimulation of anabolic pathways, activation of catabolic pathways, denervation, and altered metabolism have been observed in muscle from old rodents and humans. OBJECTIVE: Recently, histone deacetylases (HDACs) have been implicated in muscle atrophy and dysfunction due to denervation, muscular dystrophy, and disuse, and HDACs play key roles in regulating metabolism in skeletal muscle. In this review, we will discuss the role of HDACs in muscle atrophy and the potential of HDAC inhibitors for the treatment of sarcopenia. CONCLUSIONS: Several HDAC isoforms are potential targets for intervention in sarcopenia. Inhibition of HDAC1 prevents muscle atrophy due to nutrient deprivation. HDAC3 regulates metabolism in skeletal muscle and may inhibit oxidative metabolism during aging. HDAC4 and HDAC5 have been implicated in muscle atrophy due to denervation, a process implicated in sarcopenia. HDAC inhibitors are already in use in the clinic, and there is promise in targeting HDACs for the treatment of sarcopenia.
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Affiliation(s)
- Michael E Walsh
- Energy Metabolism Laboratory, Swiss Federal Institute of Technology (ETH) Zurich , Zurich, Switzerland
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Bharathy N, Suriyamurthy S, Rao VK, Ow JR, Lim HJ, Chakraborty P, Vasudevan M, Dhamne CA, Chang KTE, Min VLK, Kundu TK, Taneja R. P/CAF mediates PAX3-FOXO1-dependent oncogenesis in alveolar rhabdomyosarcoma. J Pathol 2016; 240:269-281. [PMID: 27453350 DOI: 10.1002/path.4773] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 07/19/2016] [Accepted: 07/21/2016] [Indexed: 12/29/2022]
Abstract
Alveolar rhabdomyosarcoma (ARMS) is an aggressive paediatric cancer of skeletal muscle with poor prognosis. A PAX3-FOXO1 fusion protein acts as a driver of malignancy in ARMS by disrupting tightly coupled but mutually exclusive pathways of proliferation and differentiation. While PAX3-FOXO1 is an attractive therapeutic target, no current treatments are designed to block its oncogenic activity. The present work shows that the histone acetyltransferase P/CAF (KAT2B) is overexpressed in primary tumours from ARMS patients. Interestingly, in fusion-positive ARMS cell lines, P/CAF acetylates and stabilizes PAX3-FOXO1 rather than MyoD, a master regulator of muscle differentiation. Silencing P/CAF, or pharmacological inhibition of its acetyltransferase activity, down-regulates PAX3-FOXO1 levels concomitant with reduced proliferation and tumour burden in xenograft mouse models. Our studies identify a P/CAF-PAX3-FOXO1 signalling node that promotes oncogenesis and may contribute to MyoD dysfunction in ARMS. This work exemplifies the therapeutic potential of targeting chromatin-modifying enzymes to inhibit fusion oncoproteins that are a frequent event in sarcomas. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Narendra Bharathy
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sudha Suriyamurthy
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Vinay Kumar Rao
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jin Rong Ow
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Huey Jin Lim
- Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Payal Chakraborty
- Bionivid Technology Pvt Ltd, 401-4 AB Cross, 1st Main, Kasturi Nagar, Bangalore, India
| | - Madavan Vasudevan
- Bionivid Technology Pvt Ltd, 401-4 AB Cross, 1st Main, Kasturi Nagar, Bangalore, India
| | | | | | - Victor Lee Kwan Min
- Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Tapas K Kundu
- Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
| | - Reshma Taneja
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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Ilavenil S, Kim DH, Srigopalram S, Arasu MV, Lee KD, Lee JC, Lee JS, Renganathan S, Choi KC. Potential Application of p-Coumaric Acid on Differentiation of C2C12 Skeletal Muscle and 3T3-L1 Preadipocytes-An in Vitro and in Silico Approach. Molecules 2016; 21:molecules21080997. [PMID: 27490527 PMCID: PMC6274435 DOI: 10.3390/molecules21080997] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 07/26/2016] [Accepted: 07/27/2016] [Indexed: 01/10/2023] Open
Abstract
Coumaric acid (CA) is a phenolic acid of the hydroxycinnamic acid family, and it has many biological functions such as anti-oxidant, anti-inflammatory, antidiabetic, anti-ulcer, anti-platelet, anti-cancer activities, etc. In the present study, we planned to analyse the potential molecular function of CA on skeletal muscle and preadipocytes differentiation using PCR and Western blot techniques. First, we analysed the impact of CA on C2C12 skeletal muscle differentiation. It revealed that CA treatment inhibited horse serum-induced skeletal muscle differentiation as evidenced by the decreased expression of early myogenic differentiation markers such as Myogenin and myoD via the AMP activated protein kinase- alpha AMPK-α mediated pathway. Furthermore, the level of lipid accumulation and changes in genes and protein expressions that are associated with lipogenesis and lipolysis were analyzed in 3T3-L1 cells. The Oil Red O staining evidenced that CA treatment inhibited lipid accumulation at the concentration of 0.1 and 0.2 mM. Furthermore, coumaric acid treatment decreased the expression of main transcriptional factors such as CCAAT/enhancer binding protein-alpha (C/EBP-α) and peroxisome proliferator-activated receptor gamma-2 (PPAR-γ2). Subsequently, CA treatment decreased the expression of sterol regulatory element binding protein-1 (SREBP-1), fatty acid synthase (FAS), acetyl CoA carboxylase (ACC) and adiponectin. Finally, we identified conformational changes induced by CA in PPAR-γ2 using computational biology tools. It revealed that CA might downregulate the PPAR-γ2 expression by directly binding with amino acids of PPAR-γ2 by hydrogen at 3.26 distance and hydrophobic interactions at 3.90 contact distances. These data indicated that CA suppressed skeletal muscle and preadipocytes differentiation through downregulation of the main transcriptional factors and their downstream targets.
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Affiliation(s)
- Soundharrajan Ilavenil
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan 330-801, Korea.
| | - Da Hye Kim
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Aoba, Sendai 980-8577, Japan.
| | - Srisesharam Srigopalram
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan 330-801, Korea.
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Kyung Dong Lee
- Department of Oriental Medicine Materials, Dongsin University, Naju 520-714, Korea.
| | - Jeong Chae Lee
- Research Center of Bioactive Materials, Institute of Molecular Biology and Genetics, Chonbuk National University, Jeonju 561-756, Korea.
| | - Jong Suk Lee
- Biocenter, Gyeonggi Institute of Science and Technology, Suwon 443-270, Korea.
| | - Senthil Renganathan
- Department of Bioinformatics, Marudupandiyar College, Tamilnadu 613-403, India.
| | - Ki Choon Choi
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan 330-801, Korea.
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HDAC Inhibitors as Epigenetic Regulators of the Immune System: Impacts on Cancer Therapy and Inflammatory Diseases. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8797206. [PMID: 27556043 PMCID: PMC4983322 DOI: 10.1155/2016/8797206] [Citation(s) in RCA: 177] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 06/08/2016] [Accepted: 06/29/2016] [Indexed: 01/13/2023]
Abstract
Histone deacetylase (HDAC) inhibitors are powerful epigenetic regulators that have enormous therapeutic potential and have pleiotropic effects at the cellular and systemic levels. To date, HDAC inhibitors are used clinically for a wide variety of disorders ranging from hematopoietic malignancies to psychiatric disorders, are known to have anti-inflammatory properties, and are in clinical trials for several other diseases. In addition to influencing gene expression, HDAC enzymes also function as part of large, multisubunit complexes which have many nonhistone targets, alter signaling at the cellular and systemic levels, and result in divergent and cell-type specific effects. Thus, the effects of HDAC inhibitor treatment are too intricate to completely understand with current knowledge but the ability of HDAC inhibitors to modulate the immune system presents intriguing therapeutic possibilities. This review will explore the complexity of HDAC inhibitor treatment at the cellular and systemic levels and suggest strategies for effective use of HDAC inhibitors in biomedical research, focusing on the ability of HDAC inhibitors to modulate the immune system. The possibility of combining the documented anticancer effects and newly emerging immunomodulatory effects of HDAC inhibitors represents a promising new combinatorial therapeutic approach for HDAC inhibitor treatments.
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Zhang P, Liu Y, Jin C, Zhang M, Lv L, Zhang X, Liu H, Zhou Y. Histone H3K9 Acetyltransferase PCAF Is Essential for Osteogenic Differentiation Through Bone Morphogenetic Protein Signaling and May Be Involved in Osteoporosis. Stem Cells 2016; 34:2332-41. [PMID: 27300495 DOI: 10.1002/stem.2424] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 04/03/2016] [Accepted: 04/18/2016] [Indexed: 12/31/2022]
Abstract
Human mesenchymal stem cells (MSCs) are multipotent progenitor cells that can differentiate into osteoblasts, chondrocytes, and adipocytes. The importance of epigenetic regulation for osteogenic differentiation of MSCs is widely accepted. However, the molecular mechanisms are poorly understood. Here, we show that histone H3K9 acetyltransferase PCAF plays a critical role in osteogenic differentiation of MSCs. Knockdown of PCAF significantly reduced the bone formation both in vitro and in vivo. Mechanistically, PCAF controls BMP signaling genes expression by increasing H3K9 acetylation. Most importantly, PCAF expression is significantly decreased in bone sections of ovariectomized or aged mice. Histone modification enzyme is chemically modifiable; therefore, PCAF may represent a novel therapeutic target for stem cell-mediated regenerative medicine and the treatment of osteoporosis. Stem Cells 2016;34:2332-2341.
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Affiliation(s)
- Ping Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China.,National Engineering Lab for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Yunsong Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Chanyuan Jin
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Min Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Longwei Lv
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Xiao Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Hao Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Yongsheng Zhou
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China. .,National Engineering Lab for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
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Zhang RH, Judson RN, Liu DY, Kast J, Rossi FMV. The lysine methyltransferase Ehmt2/G9a is dispensable for skeletal muscle development and regeneration. Skelet Muscle 2016; 6:22. [PMID: 27239264 PMCID: PMC4882833 DOI: 10.1186/s13395-016-0093-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 05/17/2016] [Indexed: 12/11/2022] Open
Abstract
Background Euchromatic histone-lysine N-methyltransferase 2 (G9a/Ehmt2) is the main enzyme responsible for the apposition of H3K9 di-methylation on histones. Due to its dual role as an epigenetic regulator and in the regulation of non-histone proteins through direct methylation, G9a has been implicated in a number of biological processes relevant to cell fate control. Recent reports employing in vitro cell lines indicate that Ehmt2 methylates MyoD to repress its transcriptional activity and therefore its ability to induce differentiation of activated myogenic cells. Methods To further investigate the importance of G9a in modulating myogenic regeneration in vivo, we crossed Ehmt2floxed mice to animals expressing Cre recombinase from the Myod locus, resulting in efficient knockout in the entire skeletal muscle lineage (Ehmt2ΔmyoD). Results Surprisingly, despite a dramatic drop in the global levels of H3K9me2, knockout animals did not show any developmental phenotype in muscle size and appearance. Consistent with this finding, purified Ehmt2ΔmyoD satellite cells had rates of activation and proliferation similar to wild-type controls. When induced to differentiate in vitro, Ehmt2 knockout cells differentiated with kinetics similar to those of control cells and demonstrated normal capacity to form myotubes. After acute muscle injury, knockout mice regenerated as efficiently as wildtype. To exclude possible compensatory mechanisms elicited by the loss of G9a during development, we restricted the knockout within adult satellite cells by crossing Ehmt2floxed mice to Pax7CreERT2 and also found normal muscle regeneration capacity. Conclusions Thus, Ehmt2 and H3K9me2 do not play significant roles in skeletal muscle development and regeneration in vivo. Electronic supplementary material The online version of this article (doi:10.1186/s13395-016-0093-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Regan-Heng Zhang
- The Biomedical Research Centre, The University of British Columbia, Vancouver, Canada
| | - Robert N Judson
- The Biomedical Research Centre, The University of British Columbia, Vancouver, Canada
| | - David Y Liu
- The Biomedical Research Centre, The University of British Columbia, Vancouver, Canada
| | - Jürgen Kast
- The Biomedical Research Centre, The University of British Columbia, Vancouver, Canada
| | - Fabio M V Rossi
- The Biomedical Research Centre, The University of British Columbia, Vancouver, Canada
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Dumont NA, Bentzinger CF, Sincennes MC, Rudnicki MA. Satellite Cells and Skeletal Muscle Regeneration. Compr Physiol 2016; 5:1027-59. [PMID: 26140708 DOI: 10.1002/cphy.c140068] [Citation(s) in RCA: 394] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Skeletal muscles are essential for vital functions such as movement, postural support, breathing, and thermogenesis. Muscle tissue is largely composed of long, postmitotic multinucleated fibers. The life-long maintenance of muscle tissue is mediated by satellite cells, lying in close proximity to the muscle fibers. Muscle satellite cells are a heterogeneous population with a small subset of muscle stem cells, termed satellite stem cells. Under homeostatic conditions all satellite cells are poised for activation by stimuli such as physical trauma or growth signals. After activation, satellite stem cells undergo symmetric divisions to expand their number or asymmetric divisions to give rise to cohorts of committed satellite cells and thus progenitors. Myogenic progenitors proliferate, and eventually differentiate through fusion with each other or to damaged fibers to reconstitute fiber integrity and function. In the recent years, research has begun to unravel the intrinsic and extrinsic mechanisms controlling satellite cell behavior. Nonetheless, an understanding of the complex cellular and molecular interactions of satellite cells with their dynamic microenvironment remains a major challenge, especially in pathological conditions. The goal of this review is to comprehensively summarize the current knowledge on satellite cell characteristics, functions, and behavior in muscle regeneration and in pathological conditions.
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Affiliation(s)
- Nicolas A Dumont
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - C Florian Bentzinger
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Nestlé Institute of Health Sciences, EPFL Campus, Lausanne, Switzerland
| | - Marie-Claude Sincennes
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Michael A Rudnicki
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Kaypee S, Sudarshan D, Shanmugam MK, Mukherjee D, Sethi G, Kundu TK. Aberrant lysine acetylation in tumorigenesis: Implications in the development of therapeutics. Pharmacol Ther 2016; 162:98-119. [PMID: 26808162 DOI: 10.1016/j.pharmthera.2016.01.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The 'language' of covalent histone modifications translates environmental and cellular cues into gene expression. This vast array of post-translational modifications on histones are more than just covalent moieties added onto a protein, as they also form a platform on which crucial cellular signals are relayed. The reversible lysine acetylation has emerged as an important post-translational modification of both histone and non-histone proteins, dictating numerous epigenetic programs within a cell. Thus, understanding the complex biology of lysine acetylation and its regulators is essential for the development of epigenetic therapeutics. In this review, we will attempt to address the complexities of lysine acetylation in the context of tumorigenesis, their role in cancer progression and emphasize on the modalities developed to target lysine acetyltransferases towards cancer treatment.
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Affiliation(s)
- Stephanie Kaypee
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
| | - Deepthi Sudarshan
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
| | - Muthu K Shanmugam
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600, Singapore
| | - Debanjan Mukherjee
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600, Singapore
| | - Tapas K Kundu
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India.
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Sincennes MC, Brun CE, Rudnicki MA. Concise Review: Epigenetic Regulation of Myogenesis in Health and Disease. Stem Cells Transl Med 2016; 5:282-90. [PMID: 26798058 PMCID: PMC4807671 DOI: 10.5966/sctm.2015-0266] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 11/19/2015] [Indexed: 02/06/2023] Open
Abstract
This review describes the recent findings on epigenetic regulation in satellite stem cells and committed myoblasts. It also addresses the potential of epigenetic drugs, such as histone deacetylase inhibitors, and their molecular mechanism of action in muscle cells. Skeletal muscle regeneration is initiated by satellite cells, a population of adult stem cells that reside in the muscle tissue. The ability of satellite cells to self-renew and to differentiate into the muscle lineage is under transcriptional and epigenetic control. Satellite cells are characterized by an open and permissive chromatin state. The transcription factor Pax7 is necessary for satellite cell function. Pax7 is a nodal factor regulating the expression of genes associated with satellite cell growth and proliferation, while preventing differentiation. Pax7 recruits chromatin modifiers to DNA to induce expression of specific target genes involved in myogenic commitment following asymmetric division of muscle stem cells. Emerging evidence suggests that replacement of canonical histones with histone variants is an important regulatory mechanism controlling the ability of satellite cells and myoblasts to differentiate. Differentiation into the muscle lineage is associated with a global gene repression characterized by a decrease in histone acetylation with an increase in repressive histone marks. However, genes important for differentiation are upregulated by the specific action of histone acetyltransferases and other chromatin modifiers, in combination with several transcription factors, including MyoD and Mef2. Treatment with histone deacetylase (HDAC) inhibitors enhances muscle regeneration and is considered as a therapeutic approach in the treatment of muscular dystrophy. This review describes the recent findings on epigenetic regulation in satellite stem cells and committed myoblasts. The potential of epigenetic drugs, such as HDAC inhibitors, as well as their molecular mechanism of action in muscle cells, will be addressed. Significance This review summarizes recent findings concerning the epigenetic regulation of satellite cells in skeletal muscle.
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Affiliation(s)
- Marie-Claude Sincennes
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Caroline E Brun
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Michael A Rudnicki
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Desimio MG, Campolo F, Dolci S, De Felici M, Farini D. SOHLH1 and SOHLH2 directly down-regulate STIMULATED BY RETINOIC ACID 8 (STRA8) expression. Cell Cycle 2015; 14:1036-45. [PMID: 25603532 DOI: 10.1080/15384101.2015.1007721] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
As the name implies, Stimulated by Retinoic Acid 8 is an early retinoic acid (RA) responsive gene pivotal for the beginning of meiosis in female and male germ cells. Its expression is strictly time-dependent and cell-specific (pre-meiotic germ cells) and likely requires a complex mechanism of regulation. In this study, we demonstrate a direct negative control of SOHLH1 and SOHLH2, 2 germ cell specific bHLH transcription factors, on Stra8 expression. We observed a negative correlation between STRA8 and SOHLH1 expression in prepuberal differentiating mouse KIT(+) spermatogonia and found that SOHLH1 and SOHLH2 were able to directly and cooperatively repress STRA8 expression in cell lines in vitro through binding to its promoter. We also identified 2 canonical E-Box motives in the Stra8 promoter that mediated the negative regulation of SOHLH1 and SOHLH2 on these gene both in the cell lines and KIT(+) spermatogonia. We hypothesize that this novel negative activity of SOHLH1 and SOHLH2 in male cooperates with that of other transcription factors to coordinate spermatogonia differentiation and the RA-induced meiosis and in female ensures STRA8 down-regulation at mid-end stages of meiotic prophase I.
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Affiliation(s)
- M G Desimio
- a Department of Biomedicine ; Section of Histology and Embryology ; University of "Tor Vergata" ; Rome , Italy
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LaBarge SA, Migdal CW, Buckner EH, Okuno H, Gertsman I, Stocks B, Barshop BA, Nalbandian SR, Philp A, McCurdy CE, Schenk S. p300 is not required for metabolic adaptation to endurance exercise training. FASEB J 2015; 30:1623-33. [PMID: 26712218 DOI: 10.1096/fj.15-281741] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 12/11/2015] [Indexed: 11/11/2022]
Abstract
The acetyltransferase, E1a-binding protein (p300), is proposed to regulate various aspects of skeletal muscle development, metabolism, and mitochondrial function,viaits interaction with numerous transcriptional regulators and other proteins. Remarkably, however, the contribution of p300 to skeletal muscle function and metabolism,in vivo, is poorly understood. To address this, we used Cre-LoxP methodology to generate mice with skeletal muscle-specific knockout of E1a-binding protein (mKO). mKO mice were indistinguishable from their wild-type/floxed littermates, with no differences in lean mass, skeletal muscle structure, fiber type, respirometry flux, or metabolites of fatty acid and amino acid metabolism.Ex vivomuscle function in extensor digitorum longus and soleus muscles, including peak stress and time to fatigue, as well asin vivorunning capacity were also comparable. Moreover, expected adaptations to a 20 d voluntary wheel running regime were not compromised in mKO mice. Taken together, these findings demonstrate that p300 is not required for the normal development or functioning of adult skeletal muscle, nor is it required for endurance exercise-mediated mitochondrial adaptations.-LaBarge, S. A., Migdal, C. W., Buckner, E. H., Okuno, H., Gertsman, I., Stocks, B., Barshop, B. A., Nalbandian, S. R., Philp, A., McCurdy, C. E., Schenk, S. p300 is not required for metabolic adaptation to endurance exercise training.
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Affiliation(s)
- Samuel A LaBarge
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Christopher W Migdal
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Elisa H Buckner
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Hiroshi Okuno
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Ilya Gertsman
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Ben Stocks
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Bruce A Barshop
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Sarah R Nalbandian
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Andrew Philp
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Carrie E McCurdy
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
| | - Simon Schenk
- *Department of Orthopaedic Surgery and Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California, USA; School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham, Edgbaston, United Kingdom; and Department of Human Physiology, University of Oregon, Eugene, Oregon, USA
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Blum R. Activation of muscle enhancers by MyoD and epigenetic modifiers. J Cell Biochem 2015; 115:1855-67. [PMID: 24905980 DOI: 10.1002/jcb.24854] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 05/30/2014] [Indexed: 12/11/2022]
Abstract
The early 1980s revelation of cis-acting genomic elements, known as transcriptional enhancers, is still regarded as one of the fundamental discoveries in the genomic field. However, only with the emergence of genome-wide techniques has the genuine biological scope of enhancers begun to be fully uncovered. Massive scientific efforts of multiple laboratories rapidly advanced the overall perception that enhancers are typified by common epigenetic characteristics that distinguish their activating potential. Broadly, chromatin modifiers and transcriptional regulators lay down the essential foundations necessary for constituting enhancers in their activated form. Basing on genome-wide ChIP-sequencing of enhancer-related marks we identified myogenic enhancers before and after muscle differentiation and discovered that MyoD was bound to nearly a third of condition-specific enhancers. Experimental studies that tested the deposition patterns of enhancer-related epigenetic marks in MyoD-null myoblasts revealed the high dependency that a specific set of muscle enhancers have towards this transcriptional regulator. Re-expression of MyoD restored the deposition of enhancer-related marks at myotube-specific enhancers and partially at myoblasts-specific enhancers. Our proposed mechanistic model suggests that MyoD is involved in recruitment of methyltransferase Set7, acetyltransferase p300 and deposition of H3K4me1 and H3K27ac at myogenic enhancers. In addition, MyoD binding at enhancers is associated with PolII occupancy and with local noncoding transcription. Modulation of muscle enhancers is suggested to be coordinated via transcription factors docking, including c-Jun and Jdp2 that bind to muscle enhancers in a MyoD-dependent manner. We hypothesize that distinct transcription factors may act as placeholders and mediate the assembly of newly formed myogenic enhancers.
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Affiliation(s)
- Roy Blum
- Laura and Isaac Perlmutter Cancer Center, Department of Pathology, New York University School of Medicine, 522 1st Avenue, New York, New York, 10016
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KAT5-mediated SOX4 acetylation orchestrates chromatin remodeling during myoblast differentiation. Cell Death Dis 2015; 6:e1857. [PMID: 26291311 PMCID: PMC4558493 DOI: 10.1038/cddis.2015.190] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 06/01/2015] [Accepted: 06/08/2015] [Indexed: 01/05/2023]
Abstract
Transcription factor SOX4 has been implicated in skeletal myoblast differentiation through the regulation of Cald1 gene expression; however, the detailed molecular mechanism underlying this process is largely unknown. Here, we demonstrate that SOX4 acetylation at lysine 95 by KAT5 (also known as Tip60) is essential for Cald1 promoter activity at the onset of C2C12 myoblast differentiation. KAT5 chromodomain was found to facilitate SOX4 recruitment to the Cald1 promoter, which is involved in chromatin remodeling at the promoter. Chromatin occupancy analysis of SOX4, KAT5, and HDAC1 indicated that the expression of putative SOX4 target genes during C2C12 myoblast differentiation is specifically regulated by the molecular switching of the co-activator KAT5 and the co-repressor HDAC1 on SOX4 transcriptional activation.
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Siengdee P, Trakooljul N, Murani E, Schwerin M, Wimmers K, Ponsuksili S. MicroRNAs Regulate Cellular ATP Levels by Targeting Mitochondrial Energy Metabolism Genes during C2C12 Myoblast Differentiation. PLoS One 2015; 10:e0127850. [PMID: 26010876 PMCID: PMC4444189 DOI: 10.1371/journal.pone.0127850] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 04/21/2015] [Indexed: 12/21/2022] Open
Abstract
In our previous study, we identified an miRNA regulatory network involved in energy metabolism in porcine muscle. To better understand the involvement of miRNAs in cellular ATP production and energy metabolism, here we used C2C12 myoblasts, in which ATP levels increase during differentiation, to identify miRNAs modulating these processes. ATP level, miRNA and mRNA microarray expression profiles during C2C12 differentiation into myotubes were assessed. The results suggest 14 miRNAs (miR-423-3p, miR-17, miR-130b, miR-301a/b, miR-345, miR-15a, miR-16a, miR-128, miR-615, miR-1968, miR-1a/b, and miR-194) as cellular ATP regulators targeting genes involved in mitochondrial energy metabolism (Cox4i2, Cox6a2, Ndufb7, Ndufs4, Ndufs5, and Ndufv1) during C2C12 differentiation. Among these, miR-423-3p showed a high inverse correlation with increasing ATP levels. Besides having implications in promoting cell growth and cell cycle progression, its function in cellular ATP regulation is yet unknown. Therefore, miR-423-3p was selected and validated for the function together with its potential target, Cox6a2. Overexpression of miR-423-3p in C2C12 myogenic differentiation lead to decreased cellular ATP level and decreased expression of Cox6a2 compared to the negative control. These results suggest miR-423-3p as a novel regulator of ATP/energy metabolism by targeting Cox6a2.
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Affiliation(s)
- Puntita Siengdee
- Research Institute for the Biology of Farm Animals (FBN), Research unit Functional Genomics, Dummerstorf, Germany
| | - Nares Trakooljul
- Research Institute for the Biology of Farm Animals (FBN), Research Unit Molecular Biology, Dummerstorf, Germany
| | - Eduard Murani
- Research Institute for the Biology of Farm Animals (FBN), Research Unit Molecular Biology, Dummerstorf, Germany
| | - Manfred Schwerin
- Research Institute for the Biology of Farm Animals (FBN), Research unit Functional Genomics, Dummerstorf, Germany
| | - Klaus Wimmers
- Research Institute for the Biology of Farm Animals (FBN), Research Unit Molecular Biology, Dummerstorf, Germany
| | - Siriluck Ponsuksili
- Research Institute for the Biology of Farm Animals (FBN), Research unit Functional Genomics, Dummerstorf, Germany
- * E-mail:
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Brancaccio A, Palacios D. Chromatin signaling in muscle stem cells: interpreting the regenerative microenvironment. Front Aging Neurosci 2015; 7:36. [PMID: 25904863 PMCID: PMC4387924 DOI: 10.3389/fnagi.2015.00036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 03/04/2015] [Indexed: 12/12/2022] Open
Abstract
Muscle regeneration in the adult occurs in response to damage at expenses of a population of adult stem cells, the satellite cells. Upon injury, either physical or genetic, signals released within the satellite cell niche lead to the commitment, expansion and differentiation of the pool of muscle progenitors to repair damaged muscle. To achieve this goal satellite cells undergo a dramatic transcriptional reprogramming to coordinately activate and repress specific subset of genes. Although the epigenetics of muscle regeneration has been extensively discussed, less emphasis has been put on how extra-cellular cues are translated into the specific chromatin reorganization necessary for progression through the myogenic program. In this review we will focus on how satellite cells sense the regenerative microenvironment in physiological and pathological circumstances, paying particular attention to the mechanism through which the external stimuli are transduced to the nucleus to modulate chromatin structure and gene expression. We will discuss the pathways involved and how alterations in this chromatin signaling may contribute to satellite cells dysfunction during aging and disease.
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Affiliation(s)
- Arianna Brancaccio
- Laboratory of Epigenetics and Signaling, IRCCS Fondazione Santa Lucia Rome, Italy
| | - Daniela Palacios
- Laboratory of Epigenetics and Signaling, IRCCS Fondazione Santa Lucia Rome, Italy
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Regulation of skeletal muscle development and homeostasis by gene imprinting, histone acetylation and microRNA. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2015; 1849:309-16. [DOI: 10.1016/j.bbagrm.2015.01.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/17/2014] [Accepted: 01/10/2015] [Indexed: 12/13/2022]
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Kim M, Sung B, Kang YJ, Kim DH, Lee Y, Hwang SY, Yoon JH, Yoo MA, Kim CM, Chung HY, Kim ND. The combination of ursolic acid and leucine potentiates the differentiation of C2C12 murine myoblasts through the mTOR signaling pathway. Int J Mol Med 2015; 35:755-62. [PMID: 25529824 DOI: 10.3892/ijmm.2014.2046] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 12/08/2014] [Indexed: 11/06/2022] Open
Abstract
Aging causes phenotypic changes in skeletal muscle progenitor cells that lead to the progressive loss of myogenic differentiation and thus a decrease in muscle mass. The naturally occurring triterpene, ursolic acid, has been reported to be an effective agent for the prevention of muscle loss by suppressing degenerative muscular dystrophy. Leucine, a branched-chain amino acid, and its metabolite, β-hydroxy-β-methylbutyric acid, have been reported to enhance protein synthesis in skeletal muscle. Therefore, the aim of the present study was to investigate whether the combination of ursolic acid and leucine promotes greater myogenic differentiation compared to either agent alone in C2C12 murine myoblasts. Morphological changes were observed and creatine kinase (CK) activity analysis was performed to determine the conditions through which the combination of ursolic acid and leucine would exert the most prominent effects on muscle cell differentiation. The effect of the combination of ursolic acid and leucine on the expression of myogenic differentiation marker genes was examined by RT-PCR and western blot analysis. The combination of ursolic acid (0.5 µM) and leucine (10 µM) proved to be the most effective in promoting myogenic differentiation. The combination of ursolic acid and leucine significantly increased CK activity than treatment with either agent alone. The level of myosin heavy chain, a myogenic differentiation marker protein, was also enhanced by the combination of ursolic acid and leucine. The combination of ursolic acid and leucine significantly induced the expression of myogenic differentiation marker genes, such as myogenic differentiation 1 (MyoD) and myogenin, at both the mRNA and protein level. In addition, the number of myotubes and the fusion index were increased. These findings indicate that the combination of ursolic acid and leucine promotes muscle cell differentiation, thus suggesting that this combination of agents may prove to be beneficial in increasing muscle mass.
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Affiliation(s)
- Minjung Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Bokyung Sung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Yong Jung Kang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Dong Hwan Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Yujin Lee
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Seong Yeon Hwang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Jeong-Hyun Yoon
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Mi-Ae Yoo
- Department of Molecular Biology, Pusan National University, Busan 609‑735, Republic of Korea
| | - Cheol Min Kim
- Research Center for Anti‑Aging Technology Development, Pusan National University, Busan 609‑735, Republic of Korea
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Nam Deuk Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
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