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Dashti P, Lewallen EA, Gordon JAR, Montecino MA, Davie JR, Stein GS, van Leeuwen JPTM, van der Eerden BCJ, van Wijnen AJ. Epigenetic regulators controlling osteogenic lineage commitment and bone formation. Bone 2024; 181:117043. [PMID: 38341164 DOI: 10.1016/j.bone.2024.117043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/08/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Bone formation and homeostasis are controlled by environmental factors and endocrine regulatory cues that initiate intracellular signaling pathways capable of modulating gene expression in the nucleus. Bone-related gene expression is controlled by nucleosome-based chromatin architecture that limits the accessibility of lineage-specific gene regulatory DNA sequences and sequence-specific transcription factors. From a developmental perspective, bone-specific gene expression must be suppressed during the early stages of embryogenesis to prevent the premature mineralization of skeletal elements during fetal growth in utero. Hence, bone formation is initially inhibited by gene suppressive epigenetic regulators, while other epigenetic regulators actively support osteoblast differentiation. Prominent epigenetic regulators that stimulate or attenuate osteogenesis include lysine methyl transferases (e.g., EZH2, SMYD2, SUV420H2), lysine deacetylases (e.g., HDAC1, HDAC3, HDAC4, HDAC7, SIRT1, SIRT3), arginine methyl transferases (e.g., PRMT1, PRMT4/CARM1, PRMT5), dioxygenases (e.g., TET2), bromodomain proteins (e.g., BRD2, BRD4) and chromodomain proteins (e.g., CBX1, CBX2, CBX5). This narrative review provides a broad overview of the covalent modifications of DNA and histone proteins that involve hundreds of enzymes that add, read, or delete these epigenetic modifications that are relevant for self-renewal and differentiation of mesenchymal stem cells, skeletal stem cells and osteoblasts during osteogenesis.
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Affiliation(s)
- Parisa Dashti
- Department of Internal Medicine, Erasmus MC, Erasmus University Medical Center, Rotterdam, Netherlands; Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Eric A Lewallen
- Department of Biological Sciences, Hampton University, Hampton, VA, USA
| | | | - Martin A Montecino
- Institute of Biomedical Sciences, Faculty of Medicine, Universidad Andres Bello, Santiago, Chile; Millennium Institute Center for Genome Regulation (CRG), Santiago, Chile
| | - James R Davie
- Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba R3E 0J9, Canada; CancerCare Manitoba Research Institute, CancerCare Manitoba, Winnipeg, Manitoba R3E 0V9, Canada.
| | - Gary S Stein
- Department of Biochemistry, University of Vermont, Burlington, VT, USA
| | | | - Bram C J van der Eerden
- Department of Internal Medicine, Erasmus MC, Erasmus University Medical Center, Rotterdam, Netherlands.
| | - Andre J van Wijnen
- Department of Internal Medicine, Erasmus MC, Erasmus University Medical Center, Rotterdam, Netherlands; Department of Biochemistry, University of Vermont, Burlington, VT, USA.
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Dashti P, Thaler R, Hawse JR, Galvan ML, van der Eerden BJ, van Wijnen AJ, Dudakovic A. G-protein coupled receptor 5C (GPRC5C) is required for osteoblast differentiation and responds to EZH2 inhibition and multiple osteogenic signals. Bone 2023; 176:116866. [PMID: 37558192 PMCID: PMC10962865 DOI: 10.1016/j.bone.2023.116866] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/24/2023] [Accepted: 08/03/2023] [Indexed: 08/11/2023]
Abstract
Osteoblast differentiation is epigenetically suppressed by the H3K27 methyltransferase EZH2, and induced by the morphogen BMP2 and transcription factor RUNX2. These factors also regulate distinct G protein coupled receptors (GPRCs; e.g., PTH1R, GPR30/GPER1). Because GPRCs transduce many physiological stimuli, we examined whether BMP2 or EZH2 inhibition (i.e., GSK126) regulates other GPRC genes in osteoblasts. RNA-seq screening of >400 mouse GPRC-related genes showed that many GPRCs are downregulated during osteogenic differentiation. The orphan receptor GPRC5C, along with a small subset of other GPRCs, is induced by BMP2 or GSK126 during Vitamin C dependent osteoblast differentiation, but not by all-trans retinoic acid. ChIP-seq analysis revealed that GSK126 reduces H3K27me3 levels at the GPRC5C gene locus in differentiating MC3T3-E1 osteoblasts, consistent with enhanced GPRC5C mRNA expression. Loss of function analyses revealed that shRNA-mediated depletion of GPRC5C decreases expression of bone markers (e.g., BGLAP and IBSP) and mineral deposition in response to BMP2 or GSK126. GPRC5C mRNA was found to be reduced in the osteopenic bones of KLF10 null mice which have compromised BMP2 signaling. GPRC5C mRNA is induced by the bone-anabolic activity of 17β-estradiol in trabecular but not cortical bone following ovariectomy. Collectively, these findings suggest that GPRC5C protein is a key node in a pro-osteogenic axis that is normally suppressed by EZH2-mediated H3K27me3 marks and induced during osteoblast differentiation by GSK126, BMP2, and/or 17β-estradiol. Because GPRC5C protein is an understudied orphan receptor required for osteoblast differentiation, identification of ligands that induce GPRC5C signaling may support therapeutic strategies to mitigate bone-related disorders.
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Affiliation(s)
- Parisa Dashti
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - John R Hawse
- Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, MN, USA
| | - M Lizeth Galvan
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Bram J van der Eerden
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Andre J van Wijnen
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands; Department of Biochemistry, University of Vermont, Burlington, VT, USA.
| | - Amel Dudakovic
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, MN, USA.
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Wu DY, Wang SS, Wu CS. A new composite fabricated from hydroxyapatite, gelatin-MgO microparticles, and compatibilized poly(butylene succinate) with osteogenic functionality. BIOMATERIALS ADVANCES 2023; 154:213586. [PMID: 37595523 DOI: 10.1016/j.bioadv.2023.213586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/21/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023]
Abstract
In this study, thermally processed recycled fish teeth (FT) and fish scales, magnesium oxide (MgO), and biobased polyesters were fabricated into new bioactive and environmentally friendly composites. The magnesium oxide was encapsulated into laboratory-made fish scale-derived gelatin to form gelatin-MgO microparticles. Hydroxyapatite (HA) and gelatin were obtained by heat-treating FTs and fish scales, respectively. Compatibilized poly(butylene succinate) (CPBS), i.e., poly(butylene succinate) (PBS) to which had been added acrylic acid-grafted PBS (PBS-g-AA) compatibilizer, was combined with HA/gelatin-MgO (GHA) to form CPBS/GHA composites. The structure and tensile properties of the composites were investigated. The CPBS/GHA composites improved the adhesion and proliferation of osteoblast cells. Osteoblast growth, osteoclast growth inhibition, and the antibacterial effect of CPBS/GHA composites were primarily due to the slow release of magnesium ions into the environment from the gelatin-MgO microparticles. Higher levels of calcium and phosphorus species were observed for various PBS/HA and CPBS/GHA composites immersed in simulated body fluid. Mineralization measurements indicated that calcium and phosphate ions precipitated in osteoblasts placed on PBS/HA and CPBS/GHA composites. The study successfully developed a new composite material containing 5 wt% gelatin/MgO (phr), CPBS/HA 10 wt% and 1.0 % gelatin/MgO (an optimum formula of MgO). This composite exhibited superior tensile strength, antibacterial effect, osteoclast growth enhancement, and osteoclast growth reduction. These results suggest that the composites may facilitate the formation of new bone formation in vivo. The CPBS/GHA composites displayed good bone tissue repair ability in engineering applications.
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Affiliation(s)
- Dung-Yi Wu
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Shan-Shue Wang
- Department of Cosmetology and Health Care, Kao Yuan University, Kaohsiung County 82101, Taiwan, Republic of China
| | - Chin-San Wu
- Department of Cosmetology and Health Care, Kao Yuan University, Kaohsiung County 82101, Taiwan, Republic of China.
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Thamnium S, Laomeephol C, Pavasant P, Osathanon T, Tabata Y, Wang C, Luckanagul JA. Osteogenic induction of asiatic acid derivatives in human periodontal ligament stem cells. Sci Rep 2023; 13:14102. [PMID: 37644086 PMCID: PMC10465493 DOI: 10.1038/s41598-023-41388-8] [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: 01/05/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023] Open
Abstract
Asiatic acid (AA) and asiaticoside, pentacyclic triterpenoid compounds derived from Centella asiatica, are known for their biological effects in promoting type I collagen synthesis and inducing osteogenesis of stem cells. However, their applications in regenerative medicine are limited due to their low potency and poor aqueous solubility. This work aimed to evaluate the osteogenic induction activity of AA derivatives in human periodontal ligament stem cells (hPDLSCs) in vitro. Four compounds were synthesised, namely 501, 502, 503, and 506. AA was used as the control. The 502 exhibited low water solubility, while the 506 compound showed the highest. The cytotoxicity analysis demonstrated that 503 caused significant deterioration in cell viability, while other derivatives showed no harmful effect on hPDLSCs. The dimethyl aminopropyl amine derivative of AA, compound 506, demonstrated a relatively high potency in inducing osteogenic differentiation. An elevated mRNA expression of osteogenic-related genes, BMP2, WNT3A, ALP, OSX and IBSP was observed with 506. Additionally, the expression of BMP-2 protein was enhanced with increasing dose of 506, and the effect was pronounced when the Erk signalling molecule was inhibited. The 506 derivative was proposed for the promotion of osteogenic differentiation in hPDLSCs by upregulating BMP2 via the Erk signalling pathway. The 506 molecule showed promise in bone tissue regeneration.
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Affiliation(s)
- Sirikool Thamnium
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Chavee Laomeephol
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Biomaterial Engineering in Medical and Health, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Prasit Pavasant
- Center of Excellence in Regenerative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thanaphum Osathanon
- Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
- Dental Stem Cell Biology Research Unit, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Institute for Life and Medical Sciences, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Chao Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, 6100641, Sichuan, People's Republic of China
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, People's Republic of China
| | - Jittima A Luckanagul
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand.
- Center of Excellence in Biomaterial Engineering in Medical and Health, Chulalongkorn University, Bangkok, 10330, Thailand.
- Center of Excellence in Plant-Produced Pharmaceuticals, Chulalongkorn University, Bangkok, 10330, Thailand.
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Abstract
Osteoporosis, characterised by low bone mass, poor bone structure, and an increased risk of fracture, is a major public health problem. There is increasing evidence that the influence of the environment on gene expression, through epigenetic processes, contributes to variation in BMD and fracture risk across the lifecourse. Such epigenetic processes include DNA methylation, histone and chromatin modifications and non-coding RNAs. Examples of associations with phenotype include DNA methylation in utero linked to maternal vitamin D status, and to methylation of target genes such as OPG and RANKL being associated with osteoporosis in later life. Epigenome-wide association studies and multi-omics technologies have further revealed susceptibility loci, and histone acetyltransferases, deacetylases and methylases are being considered as therapeutic targets. This review encompasses recent advances in our understanding of epigenetic mechanisms in the regulation of bone mass and osteoporosis development, and outlines possible diagnostic and prognostic biomarker applications.
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Affiliation(s)
| | | | - Cyrus Cooper
- MRC Lifecourse Epidemiology Centre, University of Southampton, UK; NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Nicholas C Harvey
- MRC Lifecourse Epidemiology Centre, University of Southampton, UK; NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK.
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Shao R, Dong Y, Zhang S, Wu X, Huang X, Sun B, Zeng B, Xu F, Liang W. State of the art of bone biomaterials and their interactions with stem cells: Current state and future directions. Biotechnol J 2022; 17:e2100074. [PMID: 35073451 DOI: 10.1002/biot.202100074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Ruyi Shao
- Department of Orthopedics Zhuji People's Hospital Shaoxing Zhejiang Province 312500 P. R. China
| | - Yongqiang Dong
- Department of Orthopaedics Xinchang People's Hospital Shaoxing Zhejiang Province 312500 P. R. China
| | - Songou Zhang
- College of Medicine Shaoxing University Shaoxing Zhejiang Province 312000 P. R. China
| | - Xudong Wu
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
| | - Xiaogang Huang
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
| | - Bin Sun
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
| | - Bin Zeng
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
| | - Fangming Xu
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
| | - Wenqing Liang
- Department of Orthopedics Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University 355 Xinqiao Road, Dinghai District Zhoushan Zhejiang Province 316000 P. R. China
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Histone Acetylation in the Epigenetic Regulation of Bone Metabolism and Related Diseases. Stem Cells Int 2021; 2021:8043346. [PMID: 34326880 PMCID: PMC8310436 DOI: 10.1155/2021/8043346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/01/2021] [Indexed: 02/05/2023] Open
Abstract
As the earliest studied epigenetic modification, acetylation has been explored a lot through the years. While bone tissue acts as an indispensable part of body, researches aimed at the relationship between the bone and acetylation became necessary. Some environmental factors like diet may affect the metabolism status that some metabolites especially nicotinamide adenine dinucleotide (NAD) were found able to regulate intracellular histone acetylation in bone metabolism. This review focuses on representing the interaction among acetylation, metabolism, and the bone. The results showed that acetylation connects a lot with bone metabolism, while the explorations about related metabolites like acetyl-CoA or different environmental exposures are still limited. Some acetylation-related therapy methods of bone diseases based on metabolic regulation or epigenetic enzymes were also reviewed.
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Histone modifications centric-regulation in osteogenic differentiation. Cell Death Dis 2021; 7:91. [PMID: 33941771 PMCID: PMC8093204 DOI: 10.1038/s41420-021-00472-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/21/2021] [Accepted: 04/07/2021] [Indexed: 02/03/2023]
Abstract
Histone modification critically contributes to the epigenetic control of gene expression by changing the configuration of chromatin and modifying the access of transcription factors to gene promoters. Recently, we observed that histone acetylation and crotonylation mediated the expression of endocytosis-related genes and tumor-related immune checkpoint genes by regulating the enrichment of signal transducer and activator of transcription 3 on these gene promoters in Alzheimer's disease and tumorigenesis, suggesting that histone modification plays an important role in disease development. Furthermore, studies performed in the past decade revealed that histone modifications affect osteogenic differentiation by regulating the expression of osteogenic marker genes. In this review, we summarize and discuss the histone modification-centric regulation of osteogenic gene expression. This review improves the understanding of the role of histone modifications in osteogenic differentiation and describes its potential as a therapeutic target for osteogenic differentiation-related diseases.
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Crous A, Abrahamse H. The Signalling Effects of Photobiomodulation on Osteoblast Proliferation, Maturation and Differentiation: A Review. Stem Cell Rev Rep 2021; 17:1570-1589. [PMID: 33686595 DOI: 10.1007/s12015-021-10142-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/21/2021] [Indexed: 02/06/2023]
Abstract
Proliferation of osteoblasts is essential for maturation and mineralization of bone matrix. Ossification, the natural phase of bone-forming and hardening is a carefully regulated phase where deregulation of this process may result in insufficient or excessive bone mineralization or ectopic calcification. Osteoblasts can also be differentiated into osteocytes, populating short interconnecting passages within the bone matrix. Over the past few decades, we have seen a significant improvement in awareness and techniques using photobiomodulation (PBM) to stimulate cell function. One of the applications of PBM is the promotion of osteoblast proliferation and maturation. PBM research results on osteoblasts showed increased mitochondrial ATP production, increased osteoblast activity and proliferation, increased and pro-osteoblast expression in the presence of red and NIR radiation. Osteocyte differentiation was also accomplished using blue and green light, showing that different light parameters have various signalling effects. The current review addresses osteoblast function and control, a new understanding of PBM on osteoblasts and its therapeutic impact using various parameters to optimize osteoblast function that may be clinically important. Graphical Abstract.
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Affiliation(s)
- Anine Crous
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, PO Box 17011, Johannesburg, 2028, South Africa.
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, PO Box 17011, Johannesburg, 2028, South Africa
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Cho YD, Kim WJ, Kim S, Ku Y, Ryoo HM. Surface Topography of Titanium Affects Their Osteogenic Potential through DNA Methylation. Int J Mol Sci 2021; 22:2406. [PMID: 33673700 PMCID: PMC7957554 DOI: 10.3390/ijms22052406] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 01/14/2023] Open
Abstract
It is widely accepted that sandblasted/large-grit/acid-etched (SLA) surfaces of titanium (Ti) have a higher osteogenic potential than machined ones. However, most studies focused on differential gene expression without elucidating the underlying mechanism for this difference. The aim of this study was to evaluate how the surface roughness of dental Ti implants affects their osteogenic potential. Mouse preosteoblast MC3T3-E1 cells were seeded on machined and SLA Ti discs. The cellular activities of the discs were analyzed using confocal laser scanning microscopy, proliferation assays, and real-time polymerase chain reaction (PCR). DNA methylation was evaluated using a methylation-specific PCR. The cell morphology was slightly different between the two types of surfaces. While cellular proliferation was slightly greater on the machined surfaces, the osteogenic response of the SLA surfaces was superior, and they showed increased alkaline phosphatase (Alp) activity and higher bone marker gene expression levels (Type I collagen, Alp, and osteocalcin). The degree of DNA methylation on the Alp gene was lower on the SLA surfaces than on the machined surfaces. DNA methyltransferase inhibitor stimulated the Alp gene expression on the machined surfaces, similar to the SLA surfaces. The superior osteogenic potential of the SLA surfaces can be attributed to a different epigenetic landscape, specifically, the DNA methylation of Alp genes. This finding offers novel insights into epigenetics to supplement genetics and raises the possibility of using epidrugs as potential therapeutic targets to enhance osteogenesis on implant surfaces.
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Affiliation(s)
- Young-Dan Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Woo-Jin Kim
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 08826, Korea;
| | - Sungtae Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Young Ku
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 08826, Korea;
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Lui H, Samsonraj RM, Vaquette C, Denbeigh J, Kakar S, Cool SM, Dudakovic A, van Wijnen AJ. Combination of BMP2 and EZH2 Inhibition to Stimulate Osteogenesis in a 3D Bone Reconstruction Model. Tissue Eng Part A 2021; 27:1084-1098. [PMID: 33234056 DOI: 10.1089/ten.tea.2020.0218] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
High concentrations of bone morphogenetic protein 2 (BMP2) in bone regeneration cause adverse events (e.g, heterotopic bone formation and acute inflammation). This study examines novel epigenetic strategies (i.e., EZH2 inhibition) for augmenting osteogenesis, thereby aiming to reduce the required BMP2 dose in vivo for bone regeneration and minimize these adverse effects. Human bone marrow-derived mesenchymal stem cells (BMSCs) were grown on three-dimensional (3D)-printed medical-grade polycaprolactone scaffolds and incubated in osteogenic media containing 50 ng/mL BMP2 and/or 5 μM GSK126 (EZH2 inhibitor) for 6 days (n = 3 per group and timepoint). Constructs were harvested for realtime quantitative polymerase chain reaction analysis at Day 10 and immunofluorescence (IF) microscopy at Day 21. After pretreating for 6 days and maintaining in osteogenic media for 4 days, BMSC-seeded scaffolds were also implanted in an immunocompromised subcutaneous murine model (n = 39; 3/group/donor and 3 control scaffolds) for histological analysis at 8 weeks. Pretreatment of BMSCs with BMP2 and BMP2/GSK126 costimulated expression of osteoblast-related genes (e.g., IBSP, SP7, RUNX2, and DLX5), as well as protein accumulation (e.g., collagen type 1/COL1A1 and osteocalcin/BGLAP) based on IF staining. While in vivo implantation for 8 weeks did not result in bone formation, increased angiogenesis was observed in BMP2 and BMP2/GSK126 groups. This study finds that BMP2 and GSK126 costimulate osteogenic differentiation of MSCs on 3D scaffolds in vitro and may contribute to enhanced vascularization when implanted in vivo to support bone formation. Thus, epigenetic priming with EZH2 inhibitors may have translational potential in bone healing by permitting a reduction of BMP2 dosing in vivo to mitigate its side effects. Impact statement While autografts are still the gold standard for bone reconstruction, tissue availability and donor morbidity are significant limitations. Previous attempts to use high concentrations of bone morphogenetic protein 2 (BMP2) have been shown to cause adverse events such as excessive bone formation and acute inflammation. Overall, the utilization of EZH2 inhibitors to modulate gene expression in favor of bone healing has been demonstrated in vitro in a tissue engineering strategy. Our study will pave the way to developing tissue engineering strategies involving GSK126 as an adjuvant to increase the effects of BMP2 for stimulating cells of interest on a three-dimensional scaffold for bone regeneration.
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Affiliation(s)
- Hayman Lui
- School of Medicine, Griffith University, Gold Coast, Queensland, Australia.,Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Rebekah M Samsonraj
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Cedryck Vaquette
- School of Dentistry, The University of Queensland, Brisbane, Queensland, Australia
| | - Janet Denbeigh
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Sanjeev Kakar
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Simon M Cool
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Amel Dudakovic
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
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12
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Kim KT, Lee YS, Han I. The Role of Epigenomics in Osteoporosis and Osteoporotic Vertebral Fracture. Int J Mol Sci 2020; 21:E9455. [PMID: 33322579 PMCID: PMC7763330 DOI: 10.3390/ijms21249455] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/06/2020] [Accepted: 12/08/2020] [Indexed: 12/29/2022] Open
Abstract
Osteoporosis is a complex multifactorial condition of the musculoskeletal system. Osteoporosis and osteoporotic vertebral fracture (OVF) are associated with high medical costs and can lead to poor quality of life. Genetic factors are important in determining bone mass and structure, as well as any predisposition for bone degradation and OVF. However, genetic factors are not enough to explain osteoporosis development and OVF occurrence. Epigenetics describes a mechanism for controlling gene expression and cellular processes without altering DNA sequences. The main mechanisms in epigenetics are DNA methylation, histone modifications, and non-coding RNAs (ncRNAs). Recently, alterations in epigenetic mechanisms and their activity have been associated with osteoporosis and OVF. Here, we review emerging evidence that epigenetics contributes to the machinery that can alter DNA structure, gene expression, and cellular differentiation during physiological and pathological bone remodeling. A progressive understanding of normal bone metabolism and the role of epigenetic mechanisms in multifactorial osteopathy can help us better understand the etiology of the disease and convert this information into clinical practice. A deep understanding of these mechanisms will help in properly coordinating future individual treatments of osteoporosis and OVF.
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Affiliation(s)
- Kyoung-Tae Kim
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (K.-T.K.); (Y.-S.L.)
- Department of Neurosurgery, Kyungpook National University Hospital, Daegu 41944, Korea
| | - Young-Seok Lee
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (K.-T.K.); (Y.-S.L.)
- Department of Neurosurgery, Kyungpook National University Chilgok Hospital, Daegu 41944, Korea
| | - Inbo Han
- Department of Neurosurgery, CHA University School of medicine, CHA Bundang Medical Center, Seongnam-si, Gyeonggi-do 13496, Korea
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13
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Yang DW, Moon JS, Ko HM, Shin YK, Fukumoto S, Kim SH, Kim MS. Direct reprogramming of fibroblasts into diverse lineage cells by DNA demethylation followed by differentiating cultures. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2020; 24:463-472. [PMID: 33093268 PMCID: PMC7585590 DOI: 10.4196/kjpp.2020.24.6.463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 09/24/2020] [Accepted: 09/26/2020] [Indexed: 11/15/2022]
Abstract
Direct reprogramming, also known as a trans-differentiation, is a technique to allow mature cells to be converted into other types of cells without inducing a pluripotent stage. It has been suggested as a major strategy to acquire the desired type of cells in cell-based therapies to repair damaged tissues. Studies related to switching the fate of cells through epigenetic modification have been progressing and they can bypass safety issues raised by the virus-based transfection methods. In this study, a protocol was established to directly convert fully differentiated fibroblasts into diverse mesenchymal-lineage cells, such as osteoblasts, adipocytes, chondrocytes, and ectodermal cells, including neurons, by means of DNA demethylation, immediately followed by culturing in various differentiating media. First, 24 h exposure of 5-azacytidine (5-aza-CN), a well-characterized DNA methyl transferase inhibitor, to NIH-3T3 murine fibroblast cells induced the expression of stem-cell markers, that is, increasing cell plasticity. Next, 5-aza-CN treated fibroblasts were cultured in osteogenic, adipogenic, chondrogenic, and neurogenic media with or without bone morphogenetic protein 2 for a designated period. Differentiation of each desired type of cell was verified by quantitative reverse transcriptase-polymerase chain reaction/western blot assays for appropriate marker expression and by various staining methods, such as alkaline phosphatase/alizarin red S/oil red O/alcian blue. These proposed procedures allowed easier acquisition of the desired cells without any transgenic modification, using direct reprogramming technology, and thus may help make it more available in the clinical fields of regenerative medicine.
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Affiliation(s)
- Dong-Wook Yang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Jung-Sun Moon
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Hyun-Mi Ko
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Yeo-Kyeong Shin
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Satoshi Fukumoto
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Sun-Hun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Min-Seok Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
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14
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Dudakovic A, Samsonraj RM, Paradise CR, Galeano-Garces C, Mol MO, Galeano-Garces D, Zan P, Galvan ML, Hevesi M, Pichurin O, Thaler R, Begun DL, Kloen P, Karperien M, Larson AN, Westendorf JJ, Cool SM, van Wijnen AJ. Inhibition of the epigenetic suppressor EZH2 primes osteogenic differentiation mediated by BMP2. J Biol Chem 2020; 295:7877-7893. [PMID: 32332097 DOI: 10.1074/jbc.ra119.011685] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 04/22/2020] [Indexed: 12/17/2022] Open
Abstract
Bone-stimulatory therapeutics include bone morphogenetic proteins (e.g. BMP2), parathyroid hormone, and antibody-based suppression of WNT antagonists. Inhibition of the epigenetic enzyme enhancer of zeste homolog 2 (EZH2) is both bone anabolic and osteoprotective. EZH2 inhibition stimulates key components of bone-stimulatory signaling pathways, including the BMP2 signaling cascade. Because of high costs and adverse effects associated with BMP2 use, here we investigated whether BMP2 dosing can be reduced by co-treatment with EZH2 inhibitors. Co-administration of BMP2 with the EZH2 inhibitor GSK126 enhanced differentiation of murine (MC3T3) osteoblasts, reflected by increased alkaline phosphatase activity, Alizarin Red staining, and expression of bone-related marker genes (e.g. Bglap and Phospho1). Strikingly, co-treatment with BMP2 (10 ng/ml) and GSK126 (5 μm) was synergistic and was as effective as 50 ng/ml BMP2 at inducing MC3T3 osteoblastogenesis. Similarly, the BMP2-GSK126 co-treatment stimulated osteogenic differentiation of human bone marrow-derived mesenchymal stem/stromal cells, reflected by induction of key osteogenic markers (e.g. Osterix/SP7 and IBSP). A combination of BMP2 (300 ng local) and GSK126 (5 μg local and 5 days of 50 mg/kg systemic) yielded more consistent bone healing than single treatments with either compound in a mouse calvarial critical-sized defect model according to results from μCT, histomorphometry, and surgical grading of qualitative X-rays. We conclude that EZH2 inhibition facilitates BMP2-mediated induction of osteogenic differentiation of progenitor cells and maturation of committed osteoblasts. We propose that epigenetic priming, coupled with bone anabolic agents, enhances osteogenesis and could be leveraged in therapeutic strategies to improve bone mass.
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Affiliation(s)
- Amel Dudakovic
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Christopher R Paradise
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA.,Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Merel O Mol
- Department of Orthopedic Surgery, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | | | - Pengfei Zan
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Orthopedic Surgery, School of Medicine, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Department of Orthopedic Surgery, School of Medicine, Shanghai Tenth People's Hospital Affiliated to Tongji University, Shanghai, China
| | - M Lizeth Galvan
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Mario Hevesi
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Oksana Pichurin
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Dana L Begun
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Peter Kloen
- Department of Orthopedic Surgery, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Marcel Karperien
- Department of Developmental BioEngineering, University of Twente, Enschede, The Netherlands
| | - A Noelle Larson
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Jennifer J Westendorf
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.,Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Simon M Cool
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Singapore.,Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA .,Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
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15
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Pepin ME, Infante T, Benincasa G, Schiano C, Miceli M, Ceccarelli S, Megiorni F, Anastasiadou E, Della Valle G, Fatone G, Faenza M, Docimo L, Nicoletti GF, Marchese C, Wende AR, Napoli C. Differential DNA Methylation Encodes Proliferation and Senescence Programs in Human Adipose-Derived Mesenchymal Stem Cells. Front Genet 2020; 11:346. [PMID: 32351540 PMCID: PMC7174643 DOI: 10.3389/fgene.2020.00346] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 03/23/2020] [Indexed: 11/28/2022] Open
Abstract
Adult adipose tissue-derived mesenchymal stem cells (ASCs) constitute a vital population of multipotent cells capable of differentiating into numerous end-organ phenotypes. However, scientific and translational endeavors to harness the regenerative potential of ASCs are currently limited by an incomplete understanding of the mechanisms that determine cell-lineage commitment and stemness. In the current study, we used reduced representation bisulfite sequencing (RRBS) analysis to identify epigenetic gene targets and cellular processes that are responsive to 5′-azacitidine (5′-AZA). We describe specific changes to DNA methylation of ASCs, uncovering pathways likely associated with the enhancement of their proliferative capacity. We identified 4,797 differentially methylated regions (FDR < 0.05) associated with 3,625 genes, of which 1,584 DMRs annotated to the promoter region. Gene set enrichment of differentially methylated promoters identified “phagocytosis,” “type 2 diabetes,” and “metabolic pathways” as disproportionately hypomethylated, whereas “adipocyte differentiation” was the most-enriched pathway among hyper-methylated gene promoters. Weighted coexpression network analysis of DMRs identified clusters associated with cellular proliferation and other developmental programs. Furthermore, the ELK4 binding site was disproportionately hyper-methylated within the promoters of genes associated with AKT signaling. Overall, this study offers numerous preliminary insights into the epigenetic landscape that influences the regenerative capacity of human ASCs.
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Affiliation(s)
- Mark E Pepin
- Department of Pathology, Division of Molecular & Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Teresa Infante
- Department of Advanced Clinical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Giuditta Benincasa
- Department of Advanced Clinical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Concetta Schiano
- Department of Advanced Clinical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | | | - Simona Ceccarelli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Francesca Megiorni
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Eleni Anastasiadou
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Giovanni Della Valle
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - Gerardo Fatone
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - Mario Faenza
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, Plastic Surgery Unit, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Ludovico Docimo
- Clinical Department of Internal Medicine and Specialistics, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Giovanni F Nicoletti
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, Plastic Surgery Unit, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Cinzia Marchese
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Adam R Wende
- Department of Pathology, Division of Molecular & Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Claudio Napoli
- IRCCS SDN, Naples, Italy.,Clinical Department of Internal Medicine and Specialistics, University of Campania Luigi Vanvitelli, Naples, Italy
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16
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Cho YD, Kim BS, Kim WJ, Kim HJ, Baek JH, Woo KM, Seol YJ, Ku Y, Ryoo HM. Histone acetylation together with DNA demethylation empowers higher plasticity in adipocytes to differentiate into osteoblasts. Gene 2020; 733:144274. [DOI: 10.1016/j.gene.2019.144274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/13/2019] [Accepted: 11/19/2019] [Indexed: 12/17/2022]
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17
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Chin KY, Pang KL. Skeletal Effects of Early-Life Exposure to Soy Isoflavones-A Review of Evidence From Rodent Models. Front Pediatr 2020; 8:563. [PMID: 33072660 PMCID: PMC7533582 DOI: 10.3389/fped.2020.00563] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 08/03/2020] [Indexed: 12/14/2022] Open
Abstract
Isoflavones are dietary phytoestrogens commonly found in soy-based products. The widespread presence of isoflavones in soy infant formula and breast milk may have long-lasting effects on the development of sex hormone-sensitive organs like the skeleton. Animal early-life programming models are suitable for testing the skeletal effects of pre- and neonatal exposure of soy isoflavones. This review aims to collate the impacts of early-life exposure of soy isoflavones as evidenced in animal models. The isoflavones previously studied include daidzein, genistein, or a combination of both. They were administered to rodent pups during the first few days postnatal, but prolonged exposure had also been studied. The skeletal effects were observed when the animals reached sexual maturity or after castration to induce bone loss. In general, neonatal exposure to soy isoflavones exerted beneficial effects on the skeletal system of female rodents, but the effects on male rodents seem to depend on the time of exposure and require further examinations. It might also protect the animals against bone loss due to ovariectomy at adulthood but not upon orchidectomy. The potential benefits of isoflavones on the skeletal system should be interpreted together with its non-skeletal effects in the assessment of its safety and impacts.
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Affiliation(s)
- Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.,State Key Laboratory of Oncogenes and Related Genes, Department of Urology, Renji-Med X Clinical Stem Cell Research Center, School of Medicine, Ren Ji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Kok-Lun Pang
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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18
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Abstract
PURPOSE OF THE REVIEW Here, we review recent findings in the field of generating insulin-producing cells by pancreatic transcription factor (pTF)-induced liver transdifferentiation (TD). TD is the direct conversion of functional cell types from one lineage to another without passing through an intermediate stage of pluripotency. We address potential reasons for the restricted efficiency of TD and suggest modalities to overcome these challenges, to bring TD closer to its clinical implementation in autologous cell replacement therapy for insulin-dependent diabetes. RECENT FINDINGS Liver to pancreas TD is restricted to cells that are a priori predisposed to undergo the developmental process. In vivo, the predisposition of liver cells is affected by liver zonation and hepatic regeneration. The TD propensity of liver cells is related to permissive epigenome which could be extended to TD-resistant cells by specific soluble factors. An obligatory role for active Wnt signaling in continuously maintaining a "permissive" epigenome is suggested. Moreover, the restoration of the pancreatic niche and vasculature promotes the maturation of TD cells along the β cell function. Future studies on liver to pancreas TD should include the maturation of TD cells by 3D culture, the restoration of vasculature and the pancreatic niche, and the extension of TD propensity to TD-resistant cells by epigenetic modifications. Liver to pancreas TD is expected to result in the generation of custom-made "self" surrogate β cells for curing diabetes.
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Affiliation(s)
- Irit Meivar-Levy
- The Sheba Regenerative Medicine, Stem Cell and Tissue Engineering Center, Sheba Medical Center, 56261, Tel-Hashomer, Israel
- Dia-Cure, Institute of Medical Scientific Research Acad. Nicolae Cajal, University Titu Maiorescu, Bucharest, Romania
| | - Sarah Ferber
- The Sheba Regenerative Medicine, Stem Cell and Tissue Engineering Center, Sheba Medical Center, 56261, Tel-Hashomer, Israel.
- Dia-Cure, Institute of Medical Scientific Research Acad. Nicolae Cajal, University Titu Maiorescu, Bucharest, Romania.
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
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19
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Yalaev BI, Tyurin AV, Mirgalieva RY, Khusainova RI. The role of DNA methylation in the disorders of bone metabolism. Vavilovskii Zhurnal Genet Selektsii 2019. [DOI: 10.18699/vj19.463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Osteoporosis is one of multifactorial diseases, it develops from interactions between the genetic component and the environment. However, the universal epigenetic markers of osteoporosis are not yet defined. Finding the risk factors will predict the risk of osteoporosis at the preclinical stage, help define the course and severity of the disease, and develop preventive measures based on them to reduce the risk of fractures. Expanding knowledge in the field of bone biology, especially in the genetics of osteoporosis and osteoimmunology, showed that osteoporosis is a disease that occurs not only due to hormonal or mechanical disorders, but also as a clinically and genetically heterogeneous disease, and there are still unknown pathogenetic links in its structure. Decreases in bone mass and matrix mineralization as well as changes in bone microarchitecture can have different pathogenetic patterns of development and, moreover, there are unknown links of the pathogenesis of osteoporosis. It is possible that DNA methylation is one of these links and a mechanism for epigenetic regulation of gene expression. Evidence exists that this mechanism alongside regulatory miRNAs and post-translational modifications makes a significant contribution to the central processes of bone remodeling; however, the results of various studies vary greatly, and, therefore, there is a need to understand the significance of the accumulated data and to make them consistent. The purpose of this review is to compile and systematize data on the role of DNA methylation in bone metabolism in normal and pathological conditions, in the formation of osteoporosis, and to assess achievements and trends in this field of research and technologies for studying DNA methylation.
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Affiliation(s)
- B. I. Yalaev
- Institute of Biochemistry and Genetics of Ufa Science Centre RAS
| | | | | | - R. I. Khusainova
- Institute of Biochemistry and Genetics of Ufa Science Centre RAS; Republican Medical-Genetic Center
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20
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Raje MM, Ashma R. Epigenetic regulation of BMP2 gene in osteoporosis: a DNA methylation study. Mol Biol Rep 2019; 46:1667-1674. [PMID: 30788762 DOI: 10.1007/s11033-019-04615-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 01/18/2019] [Indexed: 12/27/2022]
Abstract
Osteoporosis is a multifactorial disease in which genetic factors and epigenetic modifications play a major role. DNA methylation is known for gene silencing and its effect on BMP2 promoter has been studied here to understand its regulatory activity in osteoporosis pathogenicity. CpG methylation in the BMP2 promoter was analyzed by performing bisulfite specific PCR on the gDNA samples extracted from whole blood of osteoporotic (n = 24) and healthy (n = 24) individuals. Disproportionate allele frequency of CpG sites was calculated statistically. Differential BMP2 expression was estimated using quantitative RT-PCR technique. Luciferase reporter assay was performed to determine and confirm differential transcriptional activity of BMP2 promoter due to methylation. Total of 14 CpG sites were reporter in the BMP2 promoter of which, CpG site at - 267th position upstream to TSS was found to have disproportionate allele frequency among osteoporotic and healthy individuals and was found to be significantly associated with osteoporosis condition. Functional and gene expression analysis of this methylated site using luciferase reporter vector and Real Time PCR approach, suggested reduced transcriptional activity of BMP2 promoter as well as decreased gene expression in disease condition. BMP2 is being a central signaling molecule, aberrant methylation in the promoter region may result into down regulation of osteoblast markers involved in bone formation.
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Affiliation(s)
- Mehrunnisa M Raje
- Center for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune, 411007, India
| | - Richa Ashma
- Center for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune, 411007, India.
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21
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Cho YD, Kim KH, Ryoo HM, Lee YM, Ku Y, Seol YJ. Recent Advances of Useful Cell Sources in the Periodontal Regeneration. Curr Stem Cell Res Ther 2019; 14:3-8. [DOI: 10.2174/1574888x13666180816113456] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 08/07/2018] [Accepted: 08/09/2018] [Indexed: 12/26/2022]
Abstract
Background:
Periodontitis is an inflammatory disease that can result in destruction of the
tooth attachment apparatus. Therefore, periodontal tissue regeneration is currently an important focus of
research in the field. Approaches using stem cells and reprogrammed cells, such as induced pluripotent
stem cells (iPSCs) or trans-differentiated cells, represent the cutting edge in periodontal regeneration,
and have led to many trials for their clinical application.
Objectives and Results:
In this review, we consider all available stem cell sources, methods to obtain
the cells, their capability to differentiate into the desired cells, and the extent of their utilization in
periodontal regeneration. In addition, we introduce the new concepts of using iPSCs and transdifferentiated
cells for periodontal regeneration. Finally, we discuss the promise of tissue engineering
for improving cell therapy outcomes for periodontal regeneration.
Conclusions:
Despite their limitations, iPSCs and trans-differentiated cells may be promising cell
sources for periodontal tissue regeneration. Further collaborative investigation is required for the effective
and safe application of these cells in combination with tissue engineering elements, like scaffolds
and biosignals.
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Affiliation(s)
- Young-Dan Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Kyoung-Hwa Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Yong-Moo Lee
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Young Ku
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Yang-Jo Seol
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
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22
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Histone methylation regulator PTIP is required to maintain normal and leukemic bone marrow niches. Proc Natl Acad Sci U S A 2018; 115:E10137-E10146. [PMID: 30297393 DOI: 10.1073/pnas.1806019115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The bone is essential for locomotion, calcium storage, and harboring the hematopoietic stem cells (HSCs) that supply the body with mature blood cells throughout life. HSCs reside at the interface of the bone and bone marrow (BM), where active bone remodeling takes place. Although the cellular components of the BM niche have been characterized, little is known about its epigenetic regulation. Here we find that the histone methylation regulator PTIP (Pax interaction with transcription-activation domain protein-1) is required to maintain the integrity of the BM niche by promoting osteoclast differentiation. PTIP directly promotes chromatin changes required for the expression of Pparγ (peroxisome proliferator-activated receptor-γ), a transcription factor essential for osteoclastogenesis. PTIP deletion leads to a drastic reduction of HSCs in the BM and induces extramedullary hematopoiesis. Furthermore, exposure of acute myeloid leukemia cells to a PTIP-deficient BM microenvironment leads to a reduction in leukemia-initiating cells and increased survival upon transplantation. Taken together, our data identify PTIP as an epigenetic regulator of osteoclastogenesis that is required for the integrity of the BM niche to sustain both normal hematopoiesis and leukemia.
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23
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Zhang M, Li Y, Rao P, Huang K, Luo D, Cai X, Xiao J. Blockade of receptors of advanced glycation end products ameliorates diabetic osteogenesis of adipose-derived stem cells through DNA methylation and Wnt signalling pathway. Cell Prolif 2018; 51:e12471. [PMID: 30014569 DOI: 10.1111/cpr.12471] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 04/18/2018] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Diabetes mellitus-related osteoporosis is caused by the imbalance between bone absorption and bone formation. Advanced glycation end products (AGEs) are considered a cause of diabetic osteoporosis. Although adipose-derived stem cells (ASCs) are promising adult stem cells in bone tissue regeneration, the ability of osteogenesis of ASCs in diabetic environment needs to explore. This study aimed to investigate the influence of AGEs on the osteogenic potential of ASCs and to explore the signalling pathways involved in its effect. MATERIALS AND METHODS ASCs were isolated from inguinal fat and cultured in osteogenic media with or without AGEs and FPS-ZM1, an inhibitor of receptor for AGEs (RAGE). Alizarin red-S, Oil Red-O and Alcian blue staining were used to confirm osteogenic, adipogenic and chondrogenic potential of ASCs, respectively. Immunofluorescence, western blotting and real-time PCR were used to measure changes in markers of osteogenic differentiation, DNA methylation and Wnt signalling. RESULTS The multipotentiality of ASCs was confirmed. Treated with AGEs, OPN and RUNX2 expressions of ASCs were reduced and there was a noticeable loss of mineralization, concomitant with an increase in the expression of RAGE, 5-MC, DNMT1 and DNMT3a. AGEs treatment also led to a loss of Wnt signalling pathway markers, including β-Catenin and LEF1, with an increase in GSK-3β. Treatment with the RAGE inhibitor, FPS-ZM1, rescued AGEs-induced loss of osteogenic potential, modulated DNA methylation and upregulated Wnt signalling in ASCs. CONCLUSIONS Our results demonstrate that AGEs-RAGE signalling inhibits the osteogenic potential of ASCs under osteoinductive conditions by modulating DNA methylation and Wnt signalling. FPS-ZM1 can rescue the negative effects of AGEs and provide a possible treatment for bone tissue regeneration in patients with diabetic osteoporosis.
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Affiliation(s)
- Maorui Zhang
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Yong Li
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Pengcheng Rao
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Kui Huang
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Daowen Luo
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Xiaoxiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jingang Xiao
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,Department of Oral and Maxillofacial Surgery, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
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24
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Cho YD, Ryoo HM. Trans-differentiation via Epigenetics: A New Paradigm in the Bone Regeneration. J Bone Metab 2018; 25:9-13. [PMID: 29564301 PMCID: PMC5854825 DOI: 10.11005/jbm.2018.25.1.9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 02/20/2018] [Accepted: 02/21/2018] [Indexed: 01/09/2023] Open
Abstract
In regenerative medicine, growing cells or tissues in the laboratory is necessary when damaged cells can not heal by themselves. Acquisition of the required cells from the patient's own cells or tissues is an ideal option without additive side effects. In this context, cell reprogramming methods, including the use of induced pluripotent stem cells (iPSCs) and trans-differentiation, have been widely studied in regenerative research. Both approaches have advantages and disadvantages, and the possibility of de-differentiation because of the epigenetic memory of iPSCs has strengthened the need for controlling the epigenetic background for successful cell reprogramming. Therefore, interest in epigenetics has increased in the field of regenerative medicine. Herein, we outline in detail the cell trans-differentiation method using epigenetic modification for bone regeneration in comparison to the use of iPSCs.
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Affiliation(s)
- Young-Dan Cho
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea.,Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
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25
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Gao C, Peng S, Feng P, Shuai C. Bone biomaterials and interactions with stem cells. Bone Res 2017; 5:17059. [PMID: 29285402 PMCID: PMC5738879 DOI: 10.1038/boneres.2017.59] [Citation(s) in RCA: 334] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/15/2017] [Accepted: 10/23/2017] [Indexed: 12/31/2022] Open
Abstract
Bone biomaterials play a vital role in bone repair by providing the necessary substrate for cell adhesion, proliferation, and differentiation and by modulating cell activity and function. In past decades, extensive efforts have been devoted to developing bone biomaterials with a focus on the following issues: (1) developing ideal biomaterials with a combination of suitable biological and mechanical properties; (2) constructing a cell microenvironment with pores ranging in size from nanoscale to submicro- and microscale; and (3) inducing the oriented differentiation of stem cells for artificial-to-biological transformation. Here we present a comprehensive review of the state of the art of bone biomaterials and their interactions with stem cells. Typical bone biomaterials that have been developed, including bioactive ceramics, biodegradable polymers, and biodegradable metals, are reviewed, with an emphasis on their characteristics and applications. The necessary porous structure of bone biomaterials for the cell microenvironment is discussed, along with the corresponding fabrication methods. Additionally, the promising seed stem cells for bone repair are summarized, and their interaction mechanisms with bone biomaterials are discussed in detail. Special attention has been paid to the signaling pathways involved in the focal adhesion and osteogenic differentiation of stem cells on bone biomaterials. Finally, achievements regarding bone biomaterials are summarized, and future research directions are proposed.
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Affiliation(s)
- Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Shuping Peng
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
- Jiangxi University of Science and Technology, Ganzhou, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China
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26
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Xu L, Liu Y, Sun Y, Wang B, Xiong Y, Lin W, Wei Q, Wang H, He W, Wang B, Li G. Tissue source determines the differentiation potentials of mesenchymal stem cells: a comparative study of human mesenchymal stem cells from bone marrow and adipose tissue. Stem Cell Res Ther 2017; 8:275. [PMID: 29208029 PMCID: PMC5718061 DOI: 10.1186/s13287-017-0716-x] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 08/09/2017] [Accepted: 10/30/2017] [Indexed: 12/20/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) possess intrinsic regeneration capacity as part of the repair process in response to injury, such as fracture or other tissue injury. Bone marrow and adipose tissue are the major sources of MSCs. However, which cell type is more effective and suitable for cell therapy remains to be answered. The intrinsic molecular mechanism supporting the assertion has also been lacking. Methods Human bone marrow-derived MSCs (BMSCs) and adipose tissue-derived MSCs (ATSCs) were isolated from bone marrow and adipose tissue obtained after total hip arthroplasty. ATSCs and BMSCs were incubated in standard growth medium. Trilineage differentiation including osteogenesis, adipogenesis, and chondrogenesis was performed by addition of relevant induction mediums. The expression levels of trilineage differentiation marker genes were evaluated by quantitative RT-PCR. The methylation status of CpG sites of Runx2, PPARγ, and Sox9 promoters were checked by bisulfite sequencing. In addition, ectopic bone formation and calvarial bone critical defect models were used to evaluate the bone regeneration ability of ATSCs and BMSCs in vivo. Results The results showed that BMSCs possessed stronger osteogenic and lower adipogenic differentiation potentials compared to ATSCs. There was no significant difference in the chondrogenic differentiation potential. The CpG sites of Runx2 promoter in BMSCs were hypomethylated, while in ATSCs they were hypermethylated. The CpG sites of PPARγ promoter in ATSCs were hypomethylated, while in BMSCs they were hypermethylated. The methylation status of Sox9 promoter in BMSCs was only slightly lower than that in ATSCs. Conclusions The epigenetic memory obtained from either bone marrow or adipose tissue favored MSC differentiation along an osteoblastic or adipocytic lineage. The methylation status of the main transcription factors controlling MSC fate contributes to the differential differentiation capacities of different source-derived MSCs. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0716-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Liangliang Xu
- Key Laboratory of Orthopaedics & Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China
| | - Yamei Liu
- Departments of Diagnostics of Traditional Chinese Medicine, Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Yuxin Sun
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China
| | - Bin Wang
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China
| | - Yunpu Xiong
- Department of Traumatology, The Third Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, 510240, People's Republic of China
| | - Weiping Lin
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China
| | - Qiushi Wei
- Key Laboratory of Orthopaedics & Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Haibin Wang
- Key Laboratory of Orthopaedics & Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wei He
- Key Laboratory of Orthopaedics & Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China. .,Department of Traumatology, The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China.
| | - Bin Wang
- Department of Traumatology, The Third Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, 510240, People's Republic of China.
| | - Gang Li
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China. .,Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China. .,Stem Cells and Regenerative Medicine Laboratory, Lui Che Woo Institute of Innovative Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, Special Administrative Region of China. .,The CUHK-ACC Space Medicine Centre on Health Maintenance of Musculoskeletal System, The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, People's Republic of China. .,Room 904, 9/F, Li Ka Shing Institute of Health Institute, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, Special Administrative Region of China.
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Abstract
PURPOSE OF REVIEW Bone remodeling is a diverse field of study with many direct clinical applications; past studies have implicated epigenetic alterations as key factors of both normal bone tissue development and function and diseases of pathologic bone remodeling. The purpose of this article is to review the most important recent advances that link epigenetic changes to the bone remodeling field. RECENT FINDINGS Epigenetics describes three major phenomena: DNA modification via methylation, histone side chain modifications, and short non-coding RNA sequences which work in concert to regulate gene transcription in a heritable fashion. Recent findings include the role of DNA methylation changes of Wnt, RANK/RANKL, and other key signaling pathways, epigenetic regulation of osteoblast and osteoclast differentiation, and others. Although much work has been done, much is still unknown. Future epigenome-wide studies should focus on extending the tissue coverage, integrating multiple epigenetic analyses with transcriptome data, and working to uncover epigenetic changes linked with early events in aberrant bone remodeling.
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Affiliation(s)
- Ali Husain
- Division of Rheumatology, Immunology, and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Matlock A Jeffries
- Division of Rheumatology, Immunology, and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Oklahoma Medical Research Foundation, Arthritis and Clinical Immunology Program, 825 NE 13th St., Laboratory MC400, Oklahoma City, OK, USA.
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Fipronil-induced enantioselective developmental toxicity to zebrafish embryo-larvae involves changes in DNA methylation. Sci Rep 2017; 7:2284. [PMID: 28536466 PMCID: PMC5442102 DOI: 10.1038/s41598-017-02255-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 03/28/2017] [Indexed: 01/01/2023] Open
Abstract
Enantioselectivity in the aquatic toxicity of chiral pesticides has been widely investigated, while the molecular mechanisms remain unclear. Thus far, few studies has focused on genomic expression related to selective toxicity in chiral pesticide, nor on epigenetic changes, such as DNA methylation. Here, we used fipronil, a broad-spectrum insecticide, as a model chemical to probe its enantioselective toxicity in embryo development. Our results showed that S-(+)-fipronil caused severer developmental toxicity in embryos. The MeDIP-Seq analysis demonstrated that S-(+)-fipronil dysregulated a higher level of genomic DNA methylation than R-(−)-fipronil. Gene Ontology analysis revealed that S-(+)-fipronil caused more differentially methylated genes that are involved in developmental processes. Compared with R-(−)-fipronil, S-(+)-fipronil significantly disrupted 7 signaling pathways (i.e., mitogen-activated protein kinases, tight junctions, focal adhesion, transforming growth factor-β, vascular smooth muscle contraction, and the hedgehog and Wnt signaling pathways) by hyper-methylation of developmentally related genes, which further induced the downregulation of those genes. Together, these data suggest that differences in DNA methylation may partly explain the enantioselectivity of fipronil to zebrafish embryos. The application of epigenetics to investigate the enantioselective toxicity mechanism of chiral chemicals would provide a further understanding of their stereoselectivity biological effects.
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29
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Bae HS, Yoon WJ, Cho YD, Islam R, Shin HR, Kim BS, Lim JM, Seo MS, Cho SA, Choi KY, Baek SH, Kim HG, Woo KM, Baek JH, Lee YS, Ryoo HM. An HDAC Inhibitor, Entinostat/MS-275, Partially Prevents Delayed Cranial Suture Closure in Heterozygous Runx2 Null Mice. J Bone Miner Res 2017; 32:951-961. [PMID: 28052439 DOI: 10.1002/jbmr.3076] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/23/2016] [Accepted: 01/03/2017] [Indexed: 12/21/2022]
Abstract
Cleidocranial dysplasia (CCD) is an autosomal dominant skeletal disorder caused by mutations in RUNX2, coding a key transcription factor of early osteogenesis. CCD patients suffer from developmental defects in cranial bones. Despite numerous investigations and clinical approaches, no therapeutic strategy has been suggested to prevent CCD. Here, we show that fetal administration of Entinostat/MS-275, a class I histone deacetylase (HDAC)-specific inhibitor, partially prevents delayed closure of cranial sutures in Runx2+/- mice strain of C57BL/6J by two mechanisms: 1) posttranslational acetylation of Runx2 protein, which stabilized the protein and activated its transcriptional activity; and 2) epigenetic regulation of Runx2 and other bone marker genes. Moreover, we show that MS-275 stimulates osteoblast proliferation effectively both in vivo and in vitro, suggesting that delayed skeletal development in CCD is closely related to the decreased number of progenitor cells as well as the delayed osteogenic differentiation. These findings provide the potential benefits of the therapeutic strategy using MS-275 to prevent CCD. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Han-Sol Bae
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Won-Joon Yoon
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Young-Dan Cho
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea.,Department of Periodontology, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Rabia Islam
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Hye-Rim Shin
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Bong-Soo Kim
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Jin-Muk Lim
- Biomedical Knowledge Engineering Laboratory, Institute of Human-Environment Interface Biology, Seoul National University, Republic of Korea
| | - Min-Seok Seo
- Interdisciplinary Program in Bioinformatics and CHO&KIM Genomics, Seoul National University, Seoul, Republic of Korea
| | - Seo-Ae Cho
- Interdisciplinary Program in Bioinformatics and CHO&KIM Genomics, Seoul National University, Seoul, Republic of Korea
| | - Kang-Young Choi
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Seung-Hak Baek
- Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Hong-Gee Kim
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea.,Biomedical Knowledge Engineering Laboratory, Institute of Human-Environment Interface Biology, Seoul National University, Republic of Korea
| | - Kyung-Mi Woo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Jeong-Hwa Baek
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Yun-Sil Lee
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
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30
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Abstract
For decades, researchers have been fascinated by the strategy of using cell therapy for bone defects; some progress in the field has been made. Owing to its ample supply and easy access, skin, the largest organ in the body, has gained attention as a potential source of stem cells. Despite extensive applications in skin and nerve regeneration, an increasing number of reports indicate its potential use in bone tissue engineering and regeneration. Unfortunately, few review articles are available to outline current research efforts in skin-based osteogenesis. This review first summarizes the latest findings on stem cells or progenitors in skin and their niches and then discusses the strategies of skin cell-based osteogenesis. We hope this article elucidates this topic and generates new ideas for future studies.
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Affiliation(s)
- Tingliang Wang
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV, USA.,Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lian Zhu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV, USA.,Division of Exercise Physiology, West Virginia University, Morgantown, WV, USA.,Mary Babb Randolph Cancer Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA
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31
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Cho YD, Kim BS, Lee CS, Kim KH, Seol YJ, Lee YM, Rhyu IC, Ku Y, Ryoo HM. Fibronectin-Derived Oligopeptide Stimulates Osteoblast Differentiation Through a Bone Morphogenic Protein 2–Like Signaling Pathway. J Periodontol 2017; 88:e42-e48. [DOI: 10.1902/jop.2016.160294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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Wang FS, Lian WS, Lee MS, Weng WT, Huang YH, Chen YS, Sun YC, Wu SL, Chuang PC, Ko JY. Histone demethylase UTX counteracts glucocorticoid deregulation of osteogenesis by modulating histone-dependent and -independent pathways. J Mol Med (Berl) 2017; 95:499-512. [PMID: 28130569 DOI: 10.1007/s00109-017-1512-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/27/2016] [Accepted: 01/18/2017] [Indexed: 12/24/2022]
Abstract
Excess glucocorticoid administration impairs osteogenic activities, which raises the risk of osteoporotic disorders. Epigenetic methylation of DNA and histone regulates the lineage commitment of progenitor cells. This study was undertaken to delineate the actions of histone lysine demethylase 6a (UTX) with regard to the glucocorticoid impediment of osteogenic differentiation. Osteogenic progenitor cells responded to supraphysiological glucocorticoid by elevating CpG dinucleotide methylation proximal to transcription start sites within Runx2 and osterix promoters and Wnt inhibitor Dickkopf-1 (Dkk1) expression concomitant with low UTX expression. 5'-Aza-deoxycystidine demethylation of Runx2 and osterix promoters abolished the glucocorticoid inhibition of mineralized matrix accumulation. Gain of UTX function attenuated the glucocorticoid-induced loss of osteogenic differentiation, whereas UTX silencing escalated adipogenic gene expression and adipocyte formation. UTX sustained osteogenic gene transcription through maintaining its occupancy to Runx2 and osterix promoters. It also mitigated the trimethylation of histone 3 at lysine 27 (H3K27me3), which reduced H3K27me3 enrichment to Dkk1 promoter and thereby lowered Dkk1 transcription. Modulation of β-catenin and Dkk1 actions restored UTX signaling in glucocorticoid-stressed cells. In vivo, UTX inhibition by exogenous methylprednisolone and GSK-J4 administration, an effect that disturbed H3K27me3, β-catenin, Dkk1, Runx2, and osterix levels, exacerbated trabecular microarchitecture loss and marrow adiposity. Taken together, glucocorticoid reduction of UTX function hindered osteogenic differentiation. Epigenetic hypomethylation of osteogenic transcription factor promoters and H3K27 contributed to the UXT alleviation of Dkk1 transcription and osteogenesis in glucocorticoid-stressed osteogenic progenitor cells. Control of UTX action has an epigenetic perspective of curtailing glucocorticoid impairment of osteogenic differentiation and bone mass. KEY MESSAGES UTX attenuates glucocorticoid deregulation of osteogenesis and adipogenesis. UTX reduces Runx2 promoter methylation and H3K27me3 enrichment in the Dkk1 promoter. β-catenin and Dkk1 modulate the glucocorticoid inhibition of UTX signaling. UTX inhibition exacerbates bone mass, trabecular microstructure and fatty marrow. UTX signaling is indispensable in fending off glucocorticoid-impaired osteogenesis.
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Affiliation(s)
- Feng-Sheng Wang
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Wei-Shiung Lian
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Mel S Lee
- Department of Orthopedic Surgery, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Wen-Tsan Weng
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Ying-Hsien Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Yu-Shan Chen
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Yi-Chih Sun
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Shing-Long Wu
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.,Core Laboratory for Phenomics and Diagonistics, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan
| | - Pei-Chin Chuang
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.
| | - Jih-Yang Ko
- Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan. .,Department of Orthopedic Surgery, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Road, Niao-Sung District, Kaohsiung, 83303, Taiwan.
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Cho Y, Kim B, Bae H, Kim W, Baek J, Woo K, Lee G, Seol Y, Lee Y, Ku Y, Rhyu I, Ryoo H. Direct Gingival Fibroblast/Osteoblast Transdifferentiation via Epigenetics. J Dent Res 2017; 96:555-561. [PMID: 28081379 DOI: 10.1177/0022034516686745] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Alveolar bone resorption caused by trauma or periodontal diseases has represented a challenge for both dental clinicians and researchers. In this study, we evaluate the osteogenic potential of human gingival fibroblasts (HGFs) through a direct transdifferentiation from HGFs to functional osteoblasts via epigenetic modification and osteogenic signaling with bone morphogenetic protein 2 (BMP2) in vitro and in vivo. HGF treatment with 5-aza-2'-deoxycytidine (5-aza-dC) induced demethylation in the hypermethylated CpG islands of the osteogenic lineage marker genes RUNX2 and ALP, and subsequent BMP2 treatment successfully drove the fibroblasts to the osteoblasts' lineage. Cell morphological changes viewed under microscopy and alkaline phosphatase (ALP) and alizarin red S (ARS) staining confirmed the osteoblastic change mediated by epigenetic modification as did real-time polymerase chain reaction (PCR), methylation-specific PCR (MSP), and chromatin immunoprecipitation (ChIP) assay, which demonstrated the altered methylation patterns in the RUNX2 and ALP promoter regions and their effect on gene expression. Furthermore, micro-computed tomography (CT) analysis of in vivo mouse cell transplantation experiments showed high-density signal in the epigenetically modified HGF group; in addition, a significant amount of bone formation was observed in the transplanted material using hematoxylin and eosin (H&E) staining as well. Collectively, our results indicate that epigenetic modification permits the direct programming of HGFs into functional osteoblasts, suggesting that this approach might open a novel therapeutic avenue in alveolar bone regeneration.
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Affiliation(s)
- Y Cho
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea.,2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - B Kim
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - H Bae
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - W Kim
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - J Baek
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - K Woo
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - G Lee
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Seol
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Lee
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Ku
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - I Rhyu
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - H Ryoo
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
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Bandara N, Gurusinghe S, Lim SY, Chen H, Chen S, Wang D, Hilbert B, Wang LX, Strappe P. Molecular control of nitric oxide synthesis through eNOS and caveolin-1 interaction regulates osteogenic differentiation of adipose-derived stem cells by modulation of Wnt/β-catenin signaling. Stem Cell Res Ther 2016; 7:182. [PMID: 27927230 PMCID: PMC5142348 DOI: 10.1186/s13287-016-0442-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/11/2016] [Accepted: 11/16/2016] [Indexed: 01/12/2023] Open
Abstract
Background Nitric oxide (NO) plays a role in a number of physiological processes including stem cell differentiation and osteogenesis. Endothelial nitric oxide synthase (eNOS), one of three NO-producing enzymes, is located in a close conformation with the caveolin-1 (CAV-1WT) membrane protein which is inhibitory to NO production. Modification of this interaction through mutation of the caveolin scaffold domain can increase NO release. In this study, we genetically modified equine adipose-derived stem cells (eASCs) with eNOS, CAV-1WT, and a CAV-1F92A (CAV-1WT mutant) and assessed NO-mediated osteogenic differentiation and the relationship with the Wnt signaling pathway. Methods NO production was enhanced by lentiviral vector co-delivery of eNOS and CAV-1F92A to eASCs, and osteogenesis and Wnt signaling was assessed by gene expression analysis and activity of a novel Runx2-GFP reporter. Cells were also exposed to a NO donor (NONOate) and the eNOS inhibitor, l-NAME. Results NO production as measured by nitrite was significantly increased in eNOS and CAV-1F92A transduced eASCs +(5.59 ± 0.22 μM) compared to eNOS alone (4.81 ± 0.59 μM) and un-transduced control cells (0.91 ± 0.23 μM) (p < 0.05). During osteogenic differentiation, higher NO correlated with increased calcium deposition, Runx2, and alkaline phosphatase (ALP) gene expression and the activity of a Runx2-eGFP reporter. Co-expression of eNOS and CAV-1WT transgenes resulted in lower NO production. Canonical Wnt signaling pathway-associated Wnt3a and Wnt8a gene expressions were increased in eNOS-CAV-1F92A cells undergoing osteogenesis whilst non-canonical Wnt5a was decreased and similar results were seen with NONOate treatment. Treatment of osteogenic cultures with 2 mM l-NAME resulted in reduced Runx2, ALP, and Wnt3a expressions, whilst Wnt5a expression was increased in eNOS-delivered cells. Co-transduction of eASCs with a Wnt pathway responsive lenti-TCF/LEF-dGFP reporter only showed activity in osteogenic cultures co-transduced with a doxycycline inducible eNOS. Lentiviral vector expression of canonical Wnt3a and non-canonical Wnt5a in eASCs was associated with induced and suppressed osteogenic differentiation, respectively, whilst treatment of eNOS-osteogenic cells with the Wnt inhibitor Dkk-1 significantly reduced expressions of Runx2 and ALP. Conclusions This study identifies NO as a regulator of canonical Wnt/β-catenin signaling to promote osteogenesis in eASCs which may contribute to novel bone regeneration strategies. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0442-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nadeeka Bandara
- School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia.,O'Brien Institute Department, St. Vincent's Institute of Medical Research, Fitzroy, VIC, 3065, Australia
| | - Saliya Gurusinghe
- School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia.,School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia
| | - Shiang Yong Lim
- O'Brien Institute Department, St. Vincent's Institute of Medical Research, Fitzroy, VIC, 3065, Australia.,Department of Surgery, St. Vincent's Hospital, University of Melbourne, Melbourne, VIC, 3002, Australia
| | - Haying Chen
- Department of Cardiology, Liaocheng People's Hospital and Affiliated Liaocheng People's Hospital of Shandong University, Liaocheng, Shandong, 252000, China
| | - Shuangfeng Chen
- Department of Cardiology, Liaocheng People's Hospital and Affiliated Liaocheng People's Hospital of Shandong University, Liaocheng, Shandong, 252000, China
| | - Dawei Wang
- Department of Cardiology, Liaocheng People's Hospital and Affiliated Liaocheng People's Hospital of Shandong University, Liaocheng, Shandong, 252000, China
| | - Bryan Hilbert
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia
| | - Le-Xin Wang
- School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia.,Department of Cardiology, Liaocheng People's Hospital and Affiliated Liaocheng People's Hospital of Shandong University, Liaocheng, Shandong, 252000, China
| | - Padraig Strappe
- School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, NSW, 2650, Australia.
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Wakitani S, Yokoi D, Hidaka Y, Nishino K. The differentially DNA-methylated region responsible for expression of runt-related transcription factor 2. J Vet Med Sci 2016; 79:230-237. [PMID: 27916785 PMCID: PMC5326923 DOI: 10.1292/jvms.16-0321] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Runt-related transcription factor 2 (Runx2) is essential for osteogenesis. This study aimes at identification of the genomic region differentially methylated in DNA for regulation of Runx2 expression. In the proximal promoter of mouse Runx2, DNA methylation was frequent at the region further than 3 kb relative to the transcription start site, in contrast to lower methylation status of the closer locus within 2 kb from the transcription start site. At the intermediate part, we identified a novel differentially methylated region in the Runx2 promoter region (Runx2-DMR): from -2.7 to -2.2 kb relative to the start site of Runx2 transcription in mice. In this region, the DNA methylation rate correlated negatively with Runx2 expression among mouse organs as well as among primary cultures of bone marrow from different dogs. Induction of mouse and dog mesenchymal-like cells into osteoblastic differentiation decreased the methylation rate of Runx2-DMR. Thus, in this study, we identified a novel genomic region in which DNA methylation status is related to Runx2 expression and detected demethylation of Runx2-DMR during osteoblastic differentiation in mouse and dog.
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Affiliation(s)
- Shoichi Wakitani
- Laboratory of Veterinary Biochemistry and Molecular Biology, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan
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Mikami Y, Tsuda H, Akiyama Y, Honda M, Shimizu N, Suzuki N, Komiyama K. Alkaline phosphatase determines polyphosphate-induced mineralization in a cell-type independent manner. J Bone Miner Metab 2016; 34:627-637. [PMID: 26475372 DOI: 10.1007/s00774-015-0719-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 09/28/2015] [Indexed: 12/28/2022]
Abstract
Polyphosphate [Poly(P)] has positive effects on osteoblast mineralization; however, the underlying mechanism remains unclear. In addition, it is unknown whether Poly(P) promotes mineralization in soft tissues. We investigated this by using various cells. Poly(P) concentrations of 1 and 0.5 mg/mL yielded high levels of mineralization in ROS17/2.8 osteoblast cells. Similarly, Poly(P) induced mineralization in cell types expressing alkaline phosphatase (ALP), namely, ATDC5 and MC3T3-E1, but not in CHO, C3H10T1/2, C2C12, and 3T3-L1 cells. Furthermore, forced expression of ALP caused Poly(P)-induced mineralization in CHO cells. These results suggest that ALP determines Poly(P)-induced mineralization in a cell-type independent manner.
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Affiliation(s)
- Yoshikazu Mikami
- Department of Pathology, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Hiromasa Tsuda
- Department of Biochemistry, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Yuko Akiyama
- Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Masaki Honda
- Department of Oral Anatomy, Aichi-Gakuin University School of Dentistry, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Noriyoshi Shimizu
- Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Naoto Suzuki
- Department of Biochemistry, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Kazuo Komiyama
- Department of Pathology, Nihon University School of Dentistry, 1-8-13 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
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Epigenetic Regulation of Bone Remodeling and Its Impacts in Osteoporosis. Int J Mol Sci 2016; 17:ijms17091446. [PMID: 27598138 PMCID: PMC5037725 DOI: 10.3390/ijms17091446] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 07/28/2016] [Accepted: 08/11/2016] [Indexed: 01/08/2023] Open
Abstract
Epigenetics describes mechanisms which control gene expression and cellular processes without changing the DNA sequence. The main mechanisms in epigenetics are DNA methylation in CpG-rich promoters, histone modifications and non-coding RNAs (ncRNAs). DNA methylation modifies the function of the DNA and correlates with gene silencing. Histone modifications including acetylation/deacetylation and phosphorylation act in diverse biological processes such as transcriptional activation/inactivation and DNA repair. Non-coding RNAs play a large part in epigenetic regulation of gene expression in addition to their roles at the transcriptional and post-transcriptional level. Osteoporosis is the most common skeletal disorder, characterized by compromised bone strength and bone micro-architectural deterioration that predisposes the bones to an increased risk of fracture. It is most often caused by an increase in bone resorption that is not sufficiently compensated by a corresponding increase in bone formation. Nowadays it is well accepted that osteoporosis is a multifactorial disorder and there are genetic risk factors for osteoporosis and bone fractures. Here we review emerging evidence that epigenetics contributes to the machinery that can alter DNA structure, gene expression, and cellular differentiation during physiological and pathological bone remodeling.
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Liu Z, Chen T, Sun W, Yuan Z, Yu M, Chen G, Guo W, Xiao J, Tian W. DNA Demethylation Rescues the Impaired Osteogenic Differentiation Ability of Human Periodontal Ligament Stem Cells in High Glucose. Sci Rep 2016; 6:27447. [PMID: 27273319 PMCID: PMC4897703 DOI: 10.1038/srep27447] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/16/2016] [Indexed: 02/05/2023] Open
Abstract
Diabetes mellitus, characterized by abnormally high blood glucose levels, gives rise to impaired bone remodeling. In response to high glucose (HG), the attenuated osteogenic differentiation capacity of human periodontal ligament stem cells (hPDLSCs) is associated with the loss of alveolar bone. Recently, DNA methylation was reported to affect osteogenic differentiation of stem cells in pathological states. However, the intrinsic mechanism linking DNA methylation to osteogenic differentiation ability in the presence of HG is still unclear. In this study, we found that diabetic rats with increased DNA methylation levels in periodontal ligaments exhibited reduced bone mass and density. In vitro application of 5-aza-2′-deoxycytidine (5-aza-dC), a DNA methyltransferase inhibitor, to decrease DNA methylation levels in hPDLSCs, rescued the osteogenic differentiation capacity of hPDLSCs under HG conditions. Moreover, we demonstrated that the canonical Wnt signaling pathway was activated during this process and, under HG circumstances, the 5-aza-dC-rescued osteogenic differentiation capacity was blocked by Dickkopf-1, an effective antagonist of the canonical Wnt signaling pathway. Taken together, these results demonstrate for the first time that suppression of DNA methylation is able to facilitate the osteogenic differentiation capacity of hPDLSCs exposed to HG, through activation of the canonical Wnt signaling pathway.
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Affiliation(s)
- Zhi Liu
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, P.R. China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Tian Chen
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Wenhua Sun
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Zongyi Yuan
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, P.R. China
| | - Mei Yu
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Guoqing Chen
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Weihua Guo
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China
| | - Jingang Xiao
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, P.R. China.,Orofacial Reconstruction and Regeneration Laboratory, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, P.R. China
| | - Weidong Tian
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P.R. China.,Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University, Chengdu 610041, P.R. China
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39
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The morphogen Decapentaplegic employs a two-tier mechanism to activate target retinal determining genes during ectopic eye formation in Drosophila. Sci Rep 2016; 6:27270. [PMID: 27270790 PMCID: PMC4895176 DOI: 10.1038/srep27270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 05/13/2016] [Indexed: 11/18/2022] Open
Abstract
Understanding the role of morphogen in activating its target genes, otherwise epigenetically repressed, during change in cell fate specification is a very fascinating yet relatively unexplored domain. Our in vivo loss-of-function genetic analyses reveal that specifically during ectopic eye formation, the morphogen Decapentaplegic (Dpp), in conjunction with the canonical signaling responsible for transcriptional activation of retinal determining (RD) genes, triggers another signaling cascade. Involving dTak1 and JNK, this pathway down-regulates the expression of polycomb group of genes to do away with their repressive role on RD genes. Upon genetic inactivation of members of this newly identified pathway, the canonical Dpp signaling fails to trigger RD gene expression beyond a threshold, critical for ectopic photoreceptor differentiation. Moreover, the drop in ectopic RD gene expression and subsequent reduction in ectopic photoreceptor differentiation resulting from inactivation of dTak1 can be rescued by down-regulating the expression of polycomb group of genes. Our results unravel an otherwise unknown role of morphogen in coordinating simultaneous transcriptional activation and de-repression of target genes implicating its importance in cellular plasticity.
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40
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Rogers MB, Shah TA, Shaikh NN. Turning Bone Morphogenetic Protein 2 (BMP2) on and off in Mesenchymal Cells. J Cell Biochem 2016; 116:2127-38. [PMID: 25776852 DOI: 10.1002/jcb.25164] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 03/10/2015] [Indexed: 01/26/2023]
Abstract
The concentration, location, and timing of bone morphogenetic protein 2 (BMP2, HGNC:1069, GeneID: 650) gene expression must be precisely regulated. Abnormal BMP2 levels cause congenital anomalies and diseases involving the mesenchymal cells that differentiate into muscle, fat, cartilage, and bone. The molecules and conditions that influence BMP2 synthesis are diverse. Understandably, complex mechanisms control Bmp2 gene expression. This review includes a compilation of agents and conditions that can induce Bmp2. The currently known trans-regulatory factors and cis-regulatory elements that modulate Bmp2 expression are summarized and discussed. Bone morphogenetic protein 2 (BMP2, HGNC:1069, GeneID: 650) is a classical morphogen; a molecule that acts at a distance and whose concentration influences cell behavior. In mesenchymal cells, the concentration of BMP2 influences myogenesis, adipogenesis, chondrogenesis, and osteogenesis. Because the amount, timing, and location of BMP2 synthesis influence the allocation of cells to muscle, fat, cartilage, and bone, the mechanisms that regulate the Bmp2 gene are crucial. Key early mesodermal events that require precise Bmp2 regulation include heart specification and morphogenesis. Originally named for its osteoinductive properties, healing fractures requires BMP2. The human Bmp2 gene also has been linked to osteoporosis and osteoarthritis. In addition, all forms of pathological calcification in the vasculature and in cardiac valves involve the pro-osteogenic BMP2. The diverse tissues, mechanisms, and diseases influenced by BMP2 are too numerous to list here (see OMIM: 112261). However, in all BMP2-influenced pathologies, changes in the behavior and differentiation of pluripotent mesenchymal cells are a recurring theme. Consequently, much effort has been devoted to identifying the molecules and conditions that influence BMP2 synthesis and the complex mechanisms that control Bmp2 gene expression. This review begins with an overview of the Bmp2 gene's chromosomal neighborhood and then summarizes and evaluates known regulatory mechanisms and inducers.
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Affiliation(s)
- Melissa B Rogers
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, NJ
| | - Tapan A Shah
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, NJ
| | - Nadia N Shaikh
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, NJ
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41
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Aguilar R, Bustos FJ, Saez M, Rojas A, Allende ML, van Wijnen AJ, van Zundert B, Montecino M. Polycomb PRC2 complex mediates epigenetic silencing of a critical osteogenic master regulator in the hippocampus. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2016; 1859:1043-55. [PMID: 27216774 DOI: 10.1016/j.bbagrm.2016.05.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 05/18/2016] [Accepted: 05/19/2016] [Indexed: 12/12/2022]
Abstract
During hippocampal neuron differentiation, the expression of critical inducers of non-neuronal cell lineages must be efficiently silenced. Runx2 transcription factor is the master regulator of mesenchymal cells responsible for intramembranous osteoblast differentiation and formation of the craniofacial bone tissue that surrounds and protects the central nervous system (CNS) in mammalian embryos. The molecular mechanisms that mediate silencing of the Runx2 gene and its downstream target osteogenic-related genes in neuronal cells have not been explored. Here, we assess the epigenetic mechanisms that mediate silencing of osteoblast-specific genes in CNS neurons. In particular, we address the contribution of histone epigenetic marks and histone modifiers on the silencing of the Runx2/p57 bone-related isoform in rat hippocampal tissues at embryonic to adult stages. Our results indicate enrichment of repressive chromatin histone marks and of the Polycomb PRC2 complex at the Runx2/p57 promoter region. Knockdown of PRC2 H3K27-methyltransferases Ezh2 and Ezh1, or forced expression of the Trithorax/COMPASS subunit Wdr5 activates Runx2/p57 mRNA expression in both immature and mature hippocampal cells. Together these results indicate that complementary epigenetic mechanisms progressively and efficiently silence critical osteoblastic genes during hippocampal neuron differentiation.
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Affiliation(s)
- Rodrigo Aguilar
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile; FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile
| | - Fernando J Bustos
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile; FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile
| | - Mauricio Saez
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile; FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile
| | - Adriana Rojas
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile; FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile
| | - Miguel L Allende
- FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile; Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago 7800003, Chile
| | | | - Brigitte van Zundert
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile
| | - Martin Montecino
- Center for Biomedical Research, Universidad Andres Bello, Santiago 8370146, Chile; FONDAP Center for Genome Regulation, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Santiago 8370146, Chile.
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Wu M, Chen G, Li YP. TGF-β and BMP signaling in osteoblast, skeletal development, and bone formation, homeostasis and disease. Bone Res 2016; 4:16009. [PMID: 27563484 PMCID: PMC4985055 DOI: 10.1038/boneres.2016.9] [Citation(s) in RCA: 1009] [Impact Index Per Article: 126.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 03/04/2016] [Accepted: 03/07/2016] [Indexed: 12/11/2022] Open
Abstract
Transforming growth factor-beta (TGF-β) and bone morphogenic protein (BMP) signaling has fundamental roles in both embryonic skeletal development and postnatal bone homeostasis. TGF-βs and BMPs, acting on a tetrameric receptor complex, transduce signals to both the canonical Smad-dependent signaling pathway (that is, TGF-β/BMP ligands, receptors, and Smads) and the non-canonical-Smad-independent signaling pathway (that is, p38 mitogen-activated protein kinase/p38 MAPK) to regulate mesenchymal stem cell differentiation during skeletal development, bone formation and bone homeostasis. Both the Smad and p38 MAPK signaling pathways converge at transcription factors, for example, Runx2 to promote osteoblast differentiation and chondrocyte differentiation from mesenchymal precursor cells. TGF-β and BMP signaling is controlled by multiple factors, including the ubiquitin–proteasome system, epigenetic factors, and microRNA. Dysregulated TGF-β and BMP signaling result in a number of bone disorders in humans. Knockout or mutation of TGF-β and BMP signaling-related genes in mice leads to bone abnormalities of varying severity, which enable a better understanding of TGF-β/BMP signaling in bone and the signaling networks underlying osteoblast differentiation and bone formation. There is also crosstalk between TGF-β/BMP signaling and several critical cytokines’ signaling pathways (for example, Wnt, Hedgehog, Notch, PTHrP, and FGF) to coordinate osteogenesis, skeletal development, and bone homeostasis. This review summarizes the recent advances in our understanding of TGF-β/BMP signaling in osteoblast differentiation, chondrocyte differentiation, skeletal development, cartilage formation, bone formation, bone homeostasis, and related human bone diseases caused by the disruption of TGF-β/BMP signaling.
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Affiliation(s)
- Mengrui Wu
- Department of Pathology, University of Alabama at Birmingham , Birmingham, USA
| | - Guiqian Chen
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA; Department of neurology, Bruke Medical Research Institute, Weil Cornell Medicine of Cornell University, White Plains, USA
| | - Yi-Ping Li
- Department of Pathology, University of Alabama at Birmingham , Birmingham, USA
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43
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Reppe S, Datta H, Gautvik KM. The Influence of DNA Methylation on Bone Cells. Curr Genomics 2016; 16:384-92. [PMID: 27019613 PMCID: PMC4765525 DOI: 10.2174/1389202916666150817202913] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 04/19/2015] [Accepted: 06/26/2015] [Indexed: 01/14/2023] Open
Abstract
DNA methylation in eukaryotes invokes heritable alterations of the of the cytosine base in DNA without changing the underlying genomic DNA sequence. DNA methylation may be modified by environmental exposures as well as gene polymorphisms and may be a mechanistic link between environmental risk factors and the development of disease. In this review, we consider the role of DNA methylation in bone cells (osteoclasts/osteoblasts/osteocytes) and their progenitors with special focus on in vitro and ex vivo analyses. The number of studies on DNA methylation in bone cells is still somewhat limited, nevertheless it is getting increasingly clear that this type of the epigenetic changes is a critical regulator of gene expression. DNA methylation is necessary for proper development and function of bone cells and is accompanied by disease characteristic functional alterations as presently reviewed including postmenopausal osteoporosis and mechanical strain.
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Affiliation(s)
- Sjur Reppe
- Oslo University Hospital, Department of Medical Biochemistry, Oslo, Norway; ; Lovisenberg Diakonale Hospital, Oslo, Norway;; University of Oslo, Institute of Basic Medical Sciences, Oslo, Norway
| | - Harish Datta
- Newcastle University, Institute of Cellular Medicine, UK
| | - Kaare M Gautvik
- Lovisenberg Diakonale Hospital, Oslo, Norway;; University of Oslo, Institute of Basic Medical Sciences, Oslo, Norway
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44
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Pérez-Campo FM, Riancho JA. Epigenetic Mechanisms Regulating Mesenchymal Stem Cell Differentiation. Curr Genomics 2016; 16:368-83. [PMID: 27019612 PMCID: PMC4765524 DOI: 10.2174/1389202916666150817202559] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 03/27/2015] [Accepted: 04/07/2015] [Indexed: 12/28/2022] Open
Abstract
Human Mesenchymal Stem Cells (hMSCs) have emerged in the last few years as one of the most promising therapeutic cell sources and, in particular, as an important tool for regenerative medicine of skeletal tissues. Although they present a more restricted potency than Embryonic Stem (ES) cells, the use of hMCS in regenerative medicine avoids many of the drawbacks characteristic of ES cells or induced pluripotent stem cells. The challenge in using these cells lies into developing precise protocols for directing cellular differentiation to generate a specific cell lineage. In order to achieve this goal, it is of the upmost importance to be able to control de process of fate decision and lineage commitment. This process requires the coordinate regulation of different molecular layers at transcriptional, posttranscriptional and translational levels. At the transcriptional level, switching on and off different sets of genes is achieved not only through transcriptional regulators, but also through their interplay with epigenetic modifiers. It is now well known that epigenetic changes take place in an orderly way through development and are critical in the determination of lineage-specific differentiation. More importantly, alteration of these epigenetic changes would, in many cases, lead to disease generation and even tumour formation. Therefore, it is crucial to elucidate how epigenetic factors, through their interplay with transcriptional regulators, control lineage commitment in hMSCs.
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Affiliation(s)
- Flor M Pérez-Campo
- Department of Internal Medicine, Hospital U. Marqués de Valdecilla-IDIVAL Universidad de Cantabria, 39008 Santander, Cantabria, Spain
| | - José A Riancho
- Department of Internal Medicine, Hospital U. Marqués de Valdecilla-IDIVAL Universidad de Cantabria, 39008 Santander, Cantabria, Spain
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Shin HR, Islam R, Yoon WJ, Lee T, Cho YD, Bae HS, Kim BS, Woo KM, Baek JH, Ryoo HM. Pin1-mediated Modification Prolongs the Nuclear Retention of β-Catenin in Wnt3a-induced Osteoblast Differentiation. J Biol Chem 2016; 291:5555-5565. [PMID: 26740630 DOI: 10.1074/jbc.m115.698563] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 11/06/2022] Open
Abstract
The canonical Wnt signaling pathway, in which β-catenin nuclear localization is a crucial step, plays an important role in osteoblast differentiation. Pin1, a prolyl isomerase, is also known as a key enzyme in osteogenesis. However, the role of Pin1 in canonical Wnt signal-induced osteoblast differentiation is poorly understood. We found that Pin1 deficiency caused osteopenia and reduction of β-catenin in bone lining cells. Similarly, Pin1 knockdown or treatment with Pin1 inhibitors strongly decreased the nuclear β-catenin level, TOP flash activity, and expression of bone marker genes induced by canonical Wnt activation and vice versa in Pin1 overexpression. Pin1 interacts directly with and isomerizes β-catenin in the nucleus. The isomerized β-catenin could not bind to nuclear adenomatous polyposis coli, which drives β-catenin out of the nucleus for proteasomal degradation, which consequently increases the retention of β-catenin in the nucleus and might explain the decrease of β-catenin ubiquitination. These results indicate that Pin1 could be a critical target to modulate β-catenin-mediated osteogenesis.
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Affiliation(s)
- Hye-Rim Shin
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Rabia Islam
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Won-Joon Yoon
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Taegyung Lee
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Young-Dan Cho
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and; Periodontology, School of Dentistry, Seoul National University, Seoul, 110-749, Korea
| | - Han-Sol Bae
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Bong-Su Kim
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Kyung-Mi Woo
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Jeong-Hwa Baek
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Hyun-Mo Ryoo
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and.
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Cho YD, Bae HS, Lee DS, Yoon WJ, Woo KM, Baek JH, Lee G, Park JC, Ku Y, Ryoo HM. Epigenetic Priming Confers Direct Cell Trans-Differentiation From Adipocyte to Osteoblast in a Transgene-Free State. J Cell Physiol 2015; 231:1484-94. [PMID: 26335354 DOI: 10.1002/jcp.25183] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 09/01/2015] [Indexed: 12/11/2022]
Abstract
The bone marrow of healthy individuals is primarily composed of osteoblasts and hematopoietic cells, while that of osteoporosis patients has a larger portion of adipocytes. There is evidence that the epigenetic landscape can strongly influence cell differentiation. We have shown that it is possible to direct the trans-differentiation of adipocytes to osteoblasts by modifying the epigenetic landscape with a DNA methyltransferase inhibitor (DNMTi), 5'-aza-dC, followed by Wnt3a treatment to signal osteogenesis. Treating 3T3-L1 adipocytes with 5'-aza-dC induced demethylation in the hypermethylated CpG regions of bone marker genes; subsequent Wnt3a treatment drove the cells to osteogenic differentiation. When old mice with predominantly adipose marrow were treated with both 5'-aza-dC and Wnt3a, decreased fatty tissue and increased bone volume were observed. Together, our results indicate that epigenetic modification permits direct programming of adipocytes into osteoblasts in a mouse model of osteoporosis, suggesting that this approach could be useful in bone tissue-engineering applications.
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Affiliation(s)
- Young-Dan Cho
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea.,Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Han-Sol Bae
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Dong-Seol Lee
- Department of Oral Histology-Developmental Biology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Won-Joon Yoon
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Kyung-Mi Woo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Jeong-Hwa Baek
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Gene Lee
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Joo-Cheol Park
- Department of Oral Histology-Developmental Biology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Young Ku
- Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Korea
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47
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Ha SW, Jang HL, Nam KT, Beck GR. Nano-hydroxyapatite modulates osteoblast lineage commitment by stimulation of DNA methylation and regulation of gene expression. Biomaterials 2015; 65:32-42. [PMID: 26141836 DOI: 10.1016/j.biomaterials.2015.06.039] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 06/09/2015] [Accepted: 06/12/2015] [Indexed: 12/26/2022]
Abstract
Hydroxyapatite (HA) is the primary structural component of the skeleton and dentition. Under biological conditions, HA does not occur spontaneously and therefore must be actively synthesized by mineralizing cells such as osteoblasts. The mechanism(s) by which HA is actively synthesized by cells and deposited to create a mineralized matrix are not fully understood and the consequences of mineralization on cell function are even less well understood. HA can be chemically synthesized (HAp) and is therefore currently being investigated as a promising therapeutic biomaterial for use as a functional scaffold and implant coating for skeletal repair and dental applications. Here we investigated the biological effects of nano-HAp (10 × 100 nm) on the lineage commitment and differentiation of bone forming osteoblasts. Exposure of early stage differentiating osteoblasts resulted in dramatic and sustained changes in gene expression, both increased and decreased, whereas later stage osteoblasts were much less responsive. Analysis of the promoter region one of the most responsive genes, alkaline phosphatase, identified the stimulation of DNA methylation following cell exposure to nano-HAp. Collectively, the results reveal the novel epigenetic regulation of cell function by nano-HAp which has significant implication on lineage determination as well as identifying a novel potential therapeutic use of nanomaterials.
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Affiliation(s)
- Shin-Woo Ha
- Department of Medicine, Division of Endocrinology Metabolism and Lipids, Emory University, Atlanta, GA 30322, United States
| | - Hae Lin Jang
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
| | - George R Beck
- The Atlanta Department of Veterans Affairs Medical Center, Decatur, GA 30033, United States; Department of Medicine, Division of Endocrinology Metabolism and Lipids, Emory University, Atlanta, GA 30322, United States; The Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, United States.
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48
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Ganguly SS, Li X, Miranti CK. The host microenvironment influences prostate cancer invasion, systemic spread, bone colonization, and osteoblastic metastasis. Front Oncol 2014; 4:364. [PMID: 25566502 PMCID: PMC4266028 DOI: 10.3389/fonc.2014.00364] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 11/29/2014] [Indexed: 12/28/2022] Open
Abstract
Prostate cancer (PCa) is the second leading cause of cancer death in men worldwide. Most PCa deaths are due to osteoblastic bone metastases. What triggers PCa metastasis to the bone and what causes osteoblastic lesions remain unanswered. A major contributor to PCa metastasis is the host microenvironment. Here, we address how the primary tumor microenvironment influences PCa metastasis via integrins, extracellular proteases, and transient epithelia-mesenchymal transition (EMT) to promote PCa progression, invasion, and metastasis. We discuss how the bone-microenvironment influences metastasis; where chemotactic cytokines favor bone homing, adhesion molecules promote colonization, and bone-derived signals induce osteoblastic lesions. Animal models that fully recapitulate human PCa progression from primary tumor to bone metastasis are needed to understand the PCa pathophysiology that leads to bone metastasis. Better delineation of the specific processes involved in PCa bone metastasize is needed to prevent or treat metastatic PCa. Therapeutic regimens that focus on the tumor microenvironment could add to the PCa pharmacopeia.
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Affiliation(s)
- Sourik S Ganguly
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Tumor Microenvironment and Metastasis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA ; Program for Skeletal Disease and Tumor Metastasis, Laboratory of Integrin Signaling and Tumorigenesis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
| | - Xiaohong Li
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Tumor Microenvironment and Metastasis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
| | - Cindy K Miranti
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Integrin Signaling and Tumorigenesis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
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