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Liu X, Astudillo Potes MD, Serdiuk V, Dashtdar B, Schreiber AC, Rezaei A, Lee Miller A, Hamouda AM, Shafi M, Elder BD, Lu L. Injectable bioactive poly(propylene fumarate) and polycaprolactone based click chemistry bone cement for spinal fusion in rabbits. J Biomed Mater Res A 2024; 112:1803-1816. [PMID: 38644548 DOI: 10.1002/jbm.a.37725] [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: 01/11/2024] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/23/2024]
Abstract
Degenerative spinal pathology is a widespread medical issue, and spine fusion surgeries are frequently performed. In this study, we fabricated an injectable bioactive click chemistry polymer cement for use in spinal fusion and bone regrowth. Taking advantages of the bioorthogonal click reaction, this cement can be crosslinked by itself eliminating the addition of a toxic initiator or catalyst, nor any external energy sources like UV light or heat. Furthermore, nano-hydroxyapatite (nHA) and microspheres carrying recombinant human bone morphogenetic protein-2 (rhBMP-2) and recombinant human vascular endothelial growth factor (rhVEGF) were used to make the cement bioactive for vascular induction and osteointegration. After implantation into a rabbit posterolateral spinal fusion (PLF) model, the cement showed excellent induction of new bone formation and bridging bone, achieving results comparable to autograft control. This is largely due to the osteogenic properties of nano-hydroxyapatite (nHA) and the released rhBMP-2 and rhVEGF growth factors. Since the availability of autograft sources is limited in clinical settings, this injectable bioactive click chemistry cement may be a promising alternative for spine fusion applications in addressing various spinal conditions.
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Affiliation(s)
- Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Maria D Astudillo Potes
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Vitalii Serdiuk
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Babak Dashtdar
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Areonna C Schreiber
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Asghar Rezaei
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - A Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Mahnoor Shafi
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Benjamin D Elder
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
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Veselá B, Ševčíková A, Holomková K, Ramešová A, Kratochvílova A, Sharpe PT, Matalová E. Inhibition of caspase-8 cascade restrains the osteoclastogenic fate of bone marrow cells. Pflugers Arch 2024; 476:1289-1302. [PMID: 38833170 DOI: 10.1007/s00424-024-02977-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/21/2024] [Accepted: 05/26/2024] [Indexed: 06/06/2024]
Abstract
Osteoclasts are multinucleated cells of hematopoietic origin, with a pivotal role in bone development and remodeling. Failure in osteoclast differentiation and activation leads to various bone disorders; thus, attention has focused on a search of molecules involved in osteoclast regulatory pathways. Caspase-8 appears to be an interesting candidate for further exploration, due to its potential function in bone development and homeostasis. Mouse bone marrow cells were differentiated into osteoclasts by RANKL stimulation. Increased activation of caspase-8 and its downstream executioner caspases (caspase-3 and caspase-6) was found during osteoclastogenesis. Subsequent inhibition of caspase-8, caspase-3, or caspase-6, respectively, during osteoclast differentiation showed distinct changes in the formation of TRAP-positive multinucleated cells and reduced expression of osteoclast markers including Acp5, Ctsk, Dcstamp, and Mmp9. Analysis of bone matrix resorption confirmed significantly reduced osteoclast function after caspase inhibition. The results clearly showed the role of caspases in the proper development of osteoclasts and contributed new knowledge about non-apoptotic function of caspases.
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Affiliation(s)
- Barbora Veselá
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic.
- Department of Physiology, University of Veterinary Sciences Brno, Brno, Czech Republic.
| | - Adéla Ševčíková
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic
| | - Kateřina Holomková
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic
| | - Alice Ramešová
- Department of Biological Sciences and Pathobiology, Centre of Biological Sciences, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Adéla Kratochvílova
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic
| | - Paul T Sharpe
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK
| | - Eva Matalová
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic
- Department of Physiology, University of Veterinary Sciences Brno, Brno, Czech Republic
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Li Y, Liu C, Han X, Sheng R, Bao L, Lei L, Wu Y, Li Q, Zhang Y, Zhang J, Wang W, Zhang Y, Li S, Wang C, Wei X, Wang J, Peng Z, Xu Y, Si S. The novel small molecule E0924G dually regulates bone formation and bone resorption through activating the PPARδ signaling pathway to prevent bone loss in ovariectomized rats and senile mice. Bioorg Chem 2024; 147:107364. [PMID: 38636434 DOI: 10.1016/j.bioorg.2024.107364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 03/24/2024] [Accepted: 04/10/2024] [Indexed: 04/20/2024]
Abstract
Osteoporosis is particularly prevalent among postmenopausal women and the elderly. In the present study, we investigated the effect of the novel small molecule E0924G (N-(4-methoxy-pyridine-2-yl)-5-methylfuran-2-formamide) on osteoporosis. E0924G significantly increased the protein expression levels of osteoprotegerin (OPG) and runt-related transcription factor 2 (RUNX2), and thus significantly promoted osteogenesis in MC3T3-E1 cells. E0924G also significantly decreased osteoclast differentiation and inhibited bone resorption and F-actin ring formation in receptor activator of NF-κB ligand (RANKL)-induced osteoclasts from RAW264.7 macrophages. Importantly, oral administration of E0924G in both ovariectomized (OVX) rats and SAMP6 senile mice significantly increased bone mineral density and decreased bone loss compared to OVX controls or SAMR1 mice. Further mechanistic studies showed that E0924G could bind to and then activate peroxisome proliferator-activated receptor delta (PPARδ), and the pro-osteoblast effect and the inhibition of osteoclast differentiation induced by E0924G were significantly abolished when PPARδ was knocked down or inhibited. In conclusion, these data strongly suggest that E0924G has the potential to prevent OVX-induced and age-related osteoporosis by dual regulation of bone formation and bone resorption through activation of the PPARδ signaling pathway.
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Affiliation(s)
- Yining Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Chao Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Xiaowan Han
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Ren Sheng
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Li Bao
- Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Lijuan Lei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Yexiang Wu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Quanjie Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Yuyan Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Jing Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Weizhi Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Yuhao Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Shunwang Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Chenyin Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Xinwei Wei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Jingrui Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China
| | - Zonggen Peng
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China.
| | - Yanni Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China.
| | - Shuyi Si
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for Screening Novel Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Tiantan Xili 1#, Beijing 100050, China.
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Promta P, Chaiyosang P, Panya A, Laorodphun P, Leelapornpisid W, Imerb N. The Evaluation of Anti-Osteoclastic Activity of the Novel Calcium Hydroxide Biodegradable Nanoparticles as an Intracanal Medicament. J Endod 2024; 50:667-673. [PMID: 38447912 DOI: 10.1016/j.joen.2024.02.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/10/2024] [Accepted: 02/25/2024] [Indexed: 03/08/2024]
Abstract
INTRODUCTION The aim of this study was to evaluate the anti-osteoclastic activity of calcium hydroxide-loaded poly(lactic-co-glycolic acid) nanoparticles [Ca(OH)2-loaded PLGA NPs] in comparison to calcium hydroxide nanoparticles [Ca(OH)2 NPs]. METHODS RAW 264.7 cell lines (third-fifth passage) were cultured and incubated with soluble receptor activator of nuclear factor kappa B ligand in triplicate. Subsequently, Ca(OH)2-loaded PLGA NPs and Ca(OH)2 NPs were added for 7 days to evaluate their effects on receptor activator of nuclear factor kappa B ligand-induced osteoclast differentiation of RAW 264.7 cells by tartrate-resistant acid phosphatase activity. Additionally, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was conducted to confirm the cytotoxicity of treatments to cells. RESULTS Tartrate-resistant acid phosphatase staining showed a significant reduction in the osteoclast number when treated with Ca(OH)2-loaded PLGA NPs compared with Ca(OH)2 NPs (P < .01). In comparison to the control, the number of osteoclasts significantly reduced upon treatment with Ca(OH)2-loaded PLGA NPs (P < .05), but there was no significant difference in Ca(OH)2 NPs. Furthermore, osteoclast morphology in both treatment groups exhibited smaller sizes than the control group. Neither Ca(OH)2-loaded PLGA NPs nor Ca(OH)2 NPs demonstrated cytotoxic effects on RAW264.7 cells. CONCLUSIONS Both Ca(OH)2 NPs with and without poly(lactic-co-glycolic acid) have the ability to inhibit osteoclast differentiation. However, Ca(OH)2-loaded PLGA NPs exhibit greater potential than Ca(OH)2 NPs, making them a promising intracanal medicament for cases of root resorption.
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Affiliation(s)
- Patarawadee Promta
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Patcharaporn Chaiyosang
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Aussara Panya
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Pongrapee Laorodphun
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Warat Leelapornpisid
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Napatsorn Imerb
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
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Piñera-Avellaneda D, Buxadera-Palomero J, Delint RC, Dalby MJ, Burgess KV, Ginebra MP, Rupérez E, Manero JM. Gallium and silver-doped titanium surfaces provide enhanced osteogenesis, reduce bone resorption and prevent bacterial infection in co-culture. Acta Biomater 2024; 180:154-170. [PMID: 38621600 DOI: 10.1016/j.actbio.2024.04.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/05/2024] [Accepted: 04/11/2024] [Indexed: 04/17/2024]
Abstract
Bacterial infection remains a significant problem associated with orthopaedic surgeries leading to surgical site infection (SSI). This unmet medical need can become an even greater complication when surgery is due to malignant bone tumor. In the present study, we evaluated in vitro titanium (Ti) implants subjected to gallium (Ga) and silver (Ag)-doped thermochemical treatment as strategy to prevent SSI and improve osteointegration in bone defects caused by diseases such as osteoporosis, bone tumor, or bone metastasis. Firstly, as Ga has been reported to be an osteoinductive and anti-resorptive agent, its performance in the mixture was proved by studying human mesenchymal stem cells (hMSC) and pre-osteoclasts (RAW264.7) behaviour. Then, the antibacterial potential provided by Ag was assessed by resembling "The Race for the Surface" between hMSC and Pseudomonas aeruginosa in two co-culture methods. Moreover, the presence of quorum sensing molecules in the co-culture was evaluated. The results highlighted the suitability of the mixture to induce osteodifferentiation and reduce osteoclastogenesis in vitro. Furthermore, the GaAg surface promoted strong survival rate and retained osteoinduction potential of hMSCs even after bacterial inoculation. Therefore, GaAg-modified titanium may be an ideal candidate to repair bone defects caused by excessive bone resorption, in addition to preventing SSI. STATEMENT OF SIGNIFICANCE: This article provides important insights into titanium for fractures caused by osteoporosis or bone metastases with high incidence in surgical site infection (SSI) because in this situation bacterial infection can become a major disaster. In order to solve this unmet medical need, we propose a titanium implant modified with gallium and silver to improve osteointegration, reduce bone resorption and avoid bacterial infection. For that aim, we study osteoblast and osteoclast behavior with the main novelty focused on the antibacterial evaluation. In this work, we recreate "the race for the surface" in long-term experiments and study bacterial virulence factors (quorum sensing). Therefore, we believe that our article could be of great interest, providing a great impact on future orthopedic applications.
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Affiliation(s)
- David Piñera-Avellaneda
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia (UPC), Barcelona East School of Engineering (EEBE), 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, UPC, EEBE, 08019, Barcelona, Spain; Institut de Recerca Sant Joan de Déu, 08034, Barcelona, Spain.
| | - Judit Buxadera-Palomero
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia (UPC), Barcelona East School of Engineering (EEBE), 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, UPC, EEBE, 08019, Barcelona, Spain; Institut de Recerca Sant Joan de Déu, 08034, Barcelona, Spain
| | - Rosalia Cuahtecontzi Delint
- Centre for the Cellular Microenvironment, Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Matthew J Dalby
- Centre for the Cellular Microenvironment, Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Karl V Burgess
- EdinOmics, University of Edinburgh, Max Born Crescent, Edinburgh, EH9 3BF, UK
| | - Maria-Pau Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia (UPC), Barcelona East School of Engineering (EEBE), 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, UPC, EEBE, 08019, Barcelona, Spain; Institut de Recerca Sant Joan de Déu, 08034, Barcelona, Spain; Institute for Bioengineering of Catalonia (IBEC), 08028, Barcelona, Spain
| | - Elisa Rupérez
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia (UPC), Barcelona East School of Engineering (EEBE), 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, UPC, EEBE, 08019, Barcelona, Spain; Institut de Recerca Sant Joan de Déu, 08034, Barcelona, Spain
| | - José María Manero
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia (UPC), Barcelona East School of Engineering (EEBE), 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, UPC, EEBE, 08019, Barcelona, Spain; Institut de Recerca Sant Joan de Déu, 08034, Barcelona, Spain
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Livshits G, Kalinkovich A. Restoration of epigenetic impairment in the skeletal muscle and chronic inflammation resolution as a therapeutic approach in sarcopenia. Ageing Res Rev 2024; 96:102267. [PMID: 38462046 DOI: 10.1016/j.arr.2024.102267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/17/2024] [Accepted: 03/06/2024] [Indexed: 03/12/2024]
Abstract
Sarcopenia is an age-associated loss of skeletal muscle mass, strength, and function, accompanied by severe adverse health outcomes, such as falls and fractures, functional decline, high health costs, and mortality. Hence, its prevention and treatment have become increasingly urgent. However, despite the wide prevalence and extensive research on sarcopenia, no FDA-approved disease-modifying drugs exist. This is probably due to a poor understanding of the mechanisms underlying its pathophysiology. Recent evidence demonstrate that sarcopenia development is characterized by two key elements: (i) epigenetic dysregulation of multiple molecular pathways associated with sarcopenia pathogenesis, such as protein remodeling, insulin resistance, mitochondria impairments, and (ii) the creation of a systemic, chronic, low-grade inflammation (SCLGI). In this review, we focus on the epigenetic regulators that have been implicated in skeletal muscle deterioration, their individual roles, and possible crosstalk. We also discuss epidrugs, which are the pharmaceuticals with the potential to restore the epigenetic mechanisms deregulated in sarcopenia. In addition, we discuss the mechanisms underlying failed SCLGI resolution in sarcopenia and the potential application of pro-resolving molecules, comprising specialized pro-resolving mediators (SPMs) and their stable mimetics and receptor agonists. These compounds, as well as epidrugs, reveal beneficial effects in preclinical studies related to sarcopenia. Based on these encouraging observations, we propose the combination of epidrugs with SCLI-resolving agents as a new therapeutic approach for sarcopenia that can effectively attenuate of its manifestations.
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Affiliation(s)
- Gregory Livshits
- Department of Morphological Sciences, Adelson School of Medicine, Ariel University, Ariel 4077625, Israel; Department of Anatomy and Anthropology, Faculty of Medical and Health Sciences, School of Medicine, Tel-Aviv University, Tel-Aviv 6905126, Israel.
| | - Alexander Kalinkovich
- Department of Anatomy and Anthropology, Faculty of Medical and Health Sciences, School of Medicine, Tel-Aviv University, Tel-Aviv 6905126, Israel
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Zhang Y, Zhao X, Zhao N, Meng H, Zhang Z, Song Y, Shan L, Zhang X, Zhang W, Sang Z. Chronic Excess Iodine Intake Inhibits Bone Reconstruction Leading to Osteoporosis in Rats. J Nutr 2024; 154:1209-1218. [PMID: 38342405 DOI: 10.1016/j.tjnut.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/04/2024] [Accepted: 02/06/2024] [Indexed: 02/13/2024] Open
Abstract
BACKGROUND Although iodine modulates bone metabolism in the treatment of thyroid disease, the effect of iodine intake on bone metabolism remains less known. OBJECTIVE This study evaluated the effect of excess iodine intake in rats on bone reconstruction in the 6th and 12th month of intervention. METHOD Rats were treated with different doses of iodinated water: the normal group (NI, 6.15 μg/d), 5-fold high iodine group (5HI, 30.75 μg/d), 10-fold high iodine group (10HI, 61.5 μg/d), 50-fold high iodine group (50HI, 307.5 μg/d), and 100-fold high iodine group (100HI, 615 μg/d). Thyroid hormone concentrations were determined by a chemiluminescent immunoassay. Morphometry and microstructure of bone trabecula were observed by hematoxylin and eosin staining and microcomputed tomography, respectively. Alkaline phosphatase (ALP) and tartrate-resistant acid phosphatase (TRAP) staining were performed to evaluate the activity of osteoblasts and osteoclasts, respectively. RESULTS The 24-h urine iodine concentration increased with iodine intake. The rats in the HI groups had higher serum thyroid-stimulating hormone and decreased serum free thyroxine concentrations in the 12th month than the NI group (all P < 0.05). The percentage of the trabecular bone area and osteoblast perimeter in the 100HI group were significantly lower than those in the NI group (P < 0.05). Increased structure model index was observed in the 50HI and 100HI groups compared with the NI group in the 6th month and increased trabecular separation in the 12th month (all P < 0.05). ALP and TRAP staining revealed osteoblastic bone formation was reduced, and the number of TRAP+ multinucleated cells decreased with increasing iodine intake. CONCLUSIONS Excess iodine intake may increase the risk of hypothyroidism in rats. Chronic excess iodine intake can lead to abnormal changes in skeletal structure, resulting in reduced activity of osteoblasts and osteoclasts, which inhibits the process of bone reconstruction and may lead to osteoporosis.
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Affiliation(s)
- Ying Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Xin Zhao
- Department of Hand Microsurgery, Tianjin Hospital, Tianjin, China
| | - Na Zhao
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Haohao Meng
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Zixuan Zhang
- Department of Preventive Medicine Specialty, School of Public Health, Jilin University, Changchun City, China
| | - Yan Song
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Le Shan
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Xinbao Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Wanqi Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China
| | - Zhongna Sang
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Key Laboratory of Environmental Nutrition and Population Health, Key Laboratory of Prevention and Control of Major Diseases in the Population, Ministry of Education, Tianjin Medical University, Tianjin, China.
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Yi SJ, Lim J, Kim K. Exploring epigenetic strategies for the treatment of osteoporosis. Mol Biol Rep 2024; 51:398. [PMID: 38453825 DOI: 10.1007/s11033-024-09353-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/14/2024] [Indexed: 03/09/2024]
Abstract
The worldwide trend toward an aging population has resulted in a higher incidence of chronic conditions, such as osteoporosis. Osteoporosis, a prevalent skeletal disorder characterized by decreased bone mass and increased fracture risk, encompasses primary and secondary forms, each with distinct etiologies. Mechanistically, osteoporosis involves an imbalance between bone resorption by osteoclasts and bone formation by osteoblasts. Current pharmacological interventions for osteoporosis, such as bisphosphonates, denosumab, and teriparatide, aim to modulate bone turnover and preserve bone density. Hormone replacement therapy and lifestyle modifications are also recommended to manage the condition. While current medications offer therapeutic options, they are not devoid of limitations. Recent studies have highlighted the importance of epigenetic mechanisms, including DNA methylation and histone modifications, in regulating gene expression during bone remodeling. The use of epigenetic drugs, or epidrugs, to target these mechanisms offers a promising avenue for therapeutic intervention in osteoporosis. In this review, we comprehensively examine the recent advancements in the application of epidrugs for treating osteoporosis.
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Affiliation(s)
- Sun-Ju Yi
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Jaeho Lim
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Kyunghwan Kim
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea.
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9
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Vallmajo-Martin Q, Millan C, Müller R, Weber FE, Ehrbar M, Ghayor C. Enhanced bone regeneration in rat calvarial defects through BMP2 release from engineered poly(ethylene glycol) hydrogels. Sci Rep 2024; 14:4916. [PMID: 38418564 PMCID: PMC10901800 DOI: 10.1038/s41598-024-55411-z] [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: 06/30/2023] [Accepted: 02/23/2024] [Indexed: 03/01/2024] Open
Abstract
The clinical standard therapy for large bone defects, typically addressed through autograft or allograft donor tissue, faces significant limitations. Tissue engineering offers a promising alternative strategy for the regeneration of substantial bone lesions. In this study, we harnessed poly(ethylene glycol) (PEG)-based hydrogels, optimizing critical parameters including stiffness, incorporation of arginine-glycine-aspartic acid (RGD) cell adhesion motifs, degradability, and the release of BMP2 to promote bone formation. In vitro we demonstrated that human bone marrow derived stromal cell (hBMSC) proliferation and spreading strongly correlates with hydrogel stiffness and adhesion to RGD peptide motifs. Moreover, the incorporation of the osteogenic growth factor BMP2 into the hydrogels enabled sustained release, effectively inducing bone regeneration in encapsulated progenitor cells. When used in vivo to treat calvarial defects in rats, we showed that hydrogels of low and intermediate stiffness optimally facilitated cell migration, proliferation, and differentiation promoting the efficient repair of bone defects. Our comprehensive in vitro and in vivo findings collectively suggest that the developed hydrogels hold significant promise for clinical translation for bone repair and regeneration by delivering sustained and controlled stimuli from active signaling molecules.
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Affiliation(s)
- Queralt Vallmajo-Martin
- Department of Obstetrics, University Hospital Zürich, University of Zürich, Schmelzbergstrasse 12, 8091, Zurich, Switzerland
- School of Life Sciences and School of Engineering, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Station 15, 1015, Lausanne, Switzerland
| | - Christopher Millan
- Department of Urology, University Hospital Zürich, University of Zürich, Wagistrasse 21, 8952, Zurich, Switzerland
| | - Ralph Müller
- Institute for Biomechanics, Eidgenössische Technische Hochschule Zürich, Leopold-Ruzicka-Weg 8093, 8049, Zurich, Switzerland
| | - Franz E Weber
- Center of Dental Medicine, Oral Biotechnology & Bioengineering, University of Zürich, Plattenstrasse 11, 8032, Zurich, Switzerland
| | - Martin Ehrbar
- Department of Obstetrics, University Hospital Zürich, University of Zürich, Schmelzbergstrasse 12, 8091, Zurich, Switzerland.
| | - Chafik Ghayor
- Center of Dental Medicine, Oral Biotechnology & Bioengineering, University of Zürich, Plattenstrasse 11, 8032, Zurich, Switzerland.
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Chen N, Diao CY, Huang X, Tan WX, Chen YB, Qian XY, Gao J, Zhao DB. RhoA Promotes Synovial Proliferation and Bone Erosion in Rheumatoid Arthritis through Wnt/PCP Pathway. Mediators Inflamm 2023; 2023:5057009. [PMID: 38022686 PMCID: PMC10667059 DOI: 10.1155/2023/5057009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 10/07/2023] [Accepted: 10/07/2023] [Indexed: 12/01/2023] Open
Abstract
Ras homolog gene family member A (RhoA) plays a major role in the Wnt/planar cell polarity (PCP) pathway, which is significantly activated in patients with rheumatoid arthritis (RA). The function of RhoA in RA synovitis and bone erosion is still elusive. Here, we not only explored the impact of RhoA on the proliferation and invasion of RA fibroblast-like synoviocytes (FLSs) but also elucidated its effect on mouse osteoclast and a mouse model of collagen-induced arthritis (CIA). Results showed that RhoA was overexpressed in RA and CIA synovial tissues. Lentivirus-mediated silencing of RhoA increased apoptosis, attenuated invasion, and dramatically upregulated osteoprotegerin/receptor activator of nuclear factor-κB ligand (OPG/RANKL) ratio in RA-FLSs. Additionally, the silencing of RhoA inhibited mouse osteoclast differentiation in vitro and alleviated synovial hyperplasia and bone erosion in the CIA mouse model. These effects in RA-FLSs and osteoclasts were all regulated by RhoA/Rho-associated protein kinase 2 (ROCK2) and might interact with Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathways.
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Affiliation(s)
- Ning Chen
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
- Department of Rheumatology and Immunology, The First People's Hospital of Yancheng, The Fourth Affiliated Hospital of Nantong University, Yancheng, China
| | - Chao-Yue Diao
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xin Huang
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Wei-Xing Tan
- Air Force Health Care Center for Special Services, Hangzhou, China
| | - Ya-Bing Chen
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xin-Yu Qian
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Jie Gao
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Dong-Bao Zhao
- Department of Rheumatology and Immunology, Changhai Hospital, Naval Medical University, Shanghai, China
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Nilawati N, Widyastuti W, Rizka Y, Kurniawan H. Dental Implant Osseointegration Inhibition by Nicotine through Increasing nAChR, NFATc1 Expression, Osteoclast Numbers, and Decreasing Osteoblast Numbers. Eur J Dent 2023; 17:1189-1193. [PMID: 36574781 PMCID: PMC10756838 DOI: 10.1055/s-0042-1758794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE The success of dental implants is determined by the osteointegration process. Many studies state that smoking cigarettes can inhibit osseointegration, but the inhibition mechanism is still unclear.The aim of this study was to identify and analyze the effect of nicotine on the inhibition of dental implant osseointegration through the expression of nicotinic acetylcholine receptor (nAChR), nuclear factor of activated T cells cytoplasmic 1 (NFATc1), osteoclast, and osteoblast numbers. MATERIALS AND METHODS This study is an experimental study of 16 New Zealand rabbits, randomized across two groups. Group 1 (eight rabbits) was a control group, and group 2 (eight rabbits) was a treatment group. The treatment group was given 2.5 mg/kg body weight/day of nicotine by injection 1 week before placement of the implant until the end of research. Observations were made in the first and the eighth week by measuring the number of osteoblast and osteoclast by immunohistology test and the expression of nAChR and NFATc1 by immunohistochemistry test. STATISTICAL ANALYSIS Data was analyzed using a one-way analysis of variance and Student's t-test. A p-value of < 0.05 was considered statistically significant. RESULTS Significant differences were found between the control and treatment groups (p < 0.05). Results showed that nicotine increases the expression of nAChR and decreases the number of osteoblasts and the expression of BMP2 and osteocalcin. CONCLUSION Nicotine inhibits the osseointegration of dental implants by increasing nAChR, NFATc1, osteoclast numbers, and decreasing osteoblast numbers.
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Affiliation(s)
- Nina Nilawati
- Department of Periodontology, Faculty of Dentistry, Universitas Hang Tuah, Surabaya, Indonesia
- Department of Periodontology, Haji General Hospital, Surabaya, Indonesia
| | - Widyastuti Widyastuti
- Department of Periodontology, Faculty of Dentistry, Universitas Hang Tuah, Surabaya, Indonesia
| | - Yoifah Rizka
- Department of Periodontology, Faculty of Dentistry, Universitas Hang Tuah, Surabaya, Indonesia
| | - Hansen Kurniawan
- Department of Periodontology, Faculty of Dentistry, Universitas Hang Tuah, Surabaya, Indonesia
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12
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Jeong H, Kim D, Montagne K, Ushida T, Furukawa KS. Differentiation-inducing effect of osteoclast microgrooves for the purpose of three-dimensional design of regenerated bone. Acta Biomater 2023; 168:174-184. [PMID: 37392936 DOI: 10.1016/j.actbio.2023.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/03/2023]
Abstract
In vivo bone remodeling is promoted by the balance between osteoclast and osteoblast activity. Conventional research on bone regeneration has mainly focused on increasing osteoblast activity, with limited studies on the effects of scaffold topography on cell differentiation. Here, we examined the effect of microgroove-patterned substrate with spacings ranging from 1 to 10 μm on the differentiation of rat bone marrow-derived osteoclast precursors. Tartrate-resistant acid phosphatase (TRAP) staining and relative gene expression quantification showed that osteoclast differentiation was enhanced in substrate with 1 µm microgroove spacing compared with that in the other groups. Additionally, the ratio of podosome maturation stages in substrate with 1 μm microgroove spacing exhibited a distinct pattern, which was characterized by an increase in the ratio of belts and rings and a decrease in that of clusters. However, myosin II abolished the effects of topography on osteoclast differentiation. Overall, these showed that the reduction of myosin II tension in the podosome core by an integrin vertical vector increased podosome stability and promoted osteoclast differentiation in substrates with 1 μm microgroove spacing, including that microgroove design plays an important role in scaffolds for bone regeneration. STATEMENT OF SIGNIFICANCE: Reduction of myosin II tension in the podosome core, facilitated by an integrin vertical vector, resulted in an enhanced osteoclast differentiation, concomitant with an increase in podosome stability within 1-μm-spaced microgrooves. These findings are anticipated to serve as valuable indicators for the regulation of osteoclast differentiation through the manipulation of biomaterial surface topography in tissue engineering. Furthermore, this study contributes to the lucidation of the underlying mechanisms governing cellular differentiation by providing insights into the impact of the microtopographical environment.
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Affiliation(s)
- Heonuk Jeong
- Department of Bioengineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Dain Kim
- Department of Mechanical Engineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Kevin Montagne
- Department of Mechanical Engineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Takashi Ushida
- Department of Mechanical Engineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Katsuko S Furukawa
- Department of Bioengineering, School of Engineering, University of Tokyo, Tokyo, Japan; Department of Mechanical Engineering, School of Engineering, University of Tokyo, Tokyo, Japan.
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13
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Murphy B, Martins C, Maggio M, Morris MA, Hoey DA. Nano sized gallium oxide surface features for enhanced antimicrobial and osteo-integrative responses. Colloids Surf B Biointerfaces 2023; 227:113378. [PMID: 37257301 DOI: 10.1016/j.colsurfb.2023.113378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/16/2023] [Accepted: 05/25/2023] [Indexed: 06/02/2023]
Abstract
Gallium oxide has known beneficial osteo-integrative properties. This may have importance for improving the osteointegration of orthopedic implants. At high concentrations gallium is cytotoxic. Therefore, integration of gallium into implant devices must be carefully controlled to limit its concentration and release. A strategy based on surface doping of gallium although challenging seems an appropriate approach to limit dose amounts to minimize cytotoxicity and maximize osteointegration benefits. In this work we develop a novel form of patterned surface doping via a block copolymer-based surface chemistry that enables very low gallium content but enhanced osteointegration as proven by comprehensive bioassays. Polystyrene-b-poly 4vinyl pyridine (PS-b-P4VP) BCP (block copolymer) films were produced on surfaces. Selective infiltration of the BCP pattern with a gallium salt precursor solution and subsequent UV-ozone treatment produced a surface pattern of gallium oxide nanodots as evidenced by atomic force and scanning electron microscopy. A comprehensive study of the bioactivity was carried out, including antimicrobial and sterility testing, gallium ion release kinetics and the interaction with human marrow mesenchymal stomal cells and mononuclear cells. Comparing the data from osteogenesis media assay tests with osteoclastogenesis tests demonstrated the potential for the gallium oxide nanodot doping to improve osteointegration properties of a surface.
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Affiliation(s)
- Bríd Murphy
- Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Ireland; School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
| | - Carolina Martins
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland; Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Ireland
| | - Mimma Maggio
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland; Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Ireland
| | - Mick A Morris
- Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Ireland; School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
| | - David A Hoey
- Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland; Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Ireland
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14
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Senarat S, Pichayakorn W, Phaechamud T, Tuntarawongsa S. Antisolvent Eudragit® polymers based in situ forming gel for periodontal controlled drug delivery. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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15
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Jake Shortt, Galettis P, Cheah CY, Davis J, Ludford-Menting M, Link EK, Martin JH, Koldej R, Ritchie D. A phase 1 clinical trial of the repurposable acetyllysine mimetic, n-methyl-2-pyrrolidone (NMP), in relapsed or refractory multiple myeloma. Clin Epigenetics 2023; 15:15. [PMID: 36709310 PMCID: PMC9884426 DOI: 10.1186/s13148-023-01427-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/13/2023] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND N-methyl-2-pyrrolidone (NMP) is an epigenetically active chemical fragment and organic solvent with numerous applications including use as a drug-delivery vehicle. Previously considered biologically inert, NMP demonstrates immunomodulatory and anti-myeloma properties that are partly explained by acetyllysine mimetic properties and non-specific bromodomain inhibition. We therefore evaluated orally administered NMP in a phase 1 dose-escalation trial to establish its maximum tolerated dose (MTD) in patients with relapsed/refractory multiple myeloma (RR-MM). Secondary endpoints were safety, pharmacokinetics (PK), overall response rate and immunological biomarkers of activity. RESULTS Thirteen patients received NMP at starting doses between 50 and 400 mg daily. Intra-patient dose escalation occurred in five patients, with one attaining the ceiling protocolised dose of 1 g daily. Median number of monthly cycles commenced was three (range 1-20). Grade 3-4 adverse events (AEs) were reported in seven (54%; 95% CI 25-81%) patients. Most common AEs (> 30% of patients) of any grade were nausea and musculoskeletal pain. The only dose limiting toxicity (DLT) was diarrhoea in a patient receiving 200 mg NMP (overall DLT rate 8%; 95% CI 0-36%). Hence, the MTD was not defined. Median progression-free and overall survival were 57 (range 29-539) days and 33 (95% CI 9.7- > 44) months, respectively. The best response of stable disease (SD) was achieved in nine patients (69%; 95% CI 39-91%). PK analysis demonstrated proportional dose-concentrations up to 400 mg daily, with a more linear relationship above 500 mg. Maximum plasma concentrations (Cmax) of 16.7 mg/L at the 800 mg dose were below those predicted to inhibit BET-bromodomains. Peripheral blood immune-profiling demonstrated maintenance of natural killer (NK) cells, and a gene expression signature suggestive of enhanced T, B and NK cell functions; a subject with prolonged exposure manifested sustained recovery of B and NK cells at 12 months. CONCLUSIONS NMP demonstrated potential disease stabilising and immunomodulatory activity at sub-BET inhibitory plasma concentrations and was well tolerated in RR-MM; an MTD was not determined up to a maximum dose of 1 g daily. Further dose-finding studies are required to optimise NMP dosing strategies for therapeutic intervention.
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Affiliation(s)
- Jake Shortt
- grid.1002.30000 0004 1936 7857Blood Cancer Therapeutics Laboratory, Department of Medicine, School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, VIC Australia ,grid.419789.a0000 0000 9295 3933Monash Haematology, Monash Health, Clayton, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, VIC Australia
| | - Peter Galettis
- grid.266842.c0000 0000 8831 109XCentre for Drug Repurposing and Medicines Research, University of Newcastle, Callaghan, NSW Australia ,grid.413648.cHunter Medical Research Institute, Kookaburra Circuit, New Lambton Heights, NSW Australia
| | - Chan Y. Cheah
- grid.3521.50000 0004 0437 5942Department of Haematology, Sir Charles Gairdner Hospital, Perth, WA Australia ,grid.1012.20000 0004 1936 7910Division of Internal Medicine, Medical School, University of Western Australia, Perth, WA Australia
| | - Joanne Davis
- grid.416153.40000 0004 0624 1200ACRF Translational Research Laboratory, Royal Melbourne Hospital, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Medicine, University of Melbourne, Melbourne, VIC Australia
| | - Mandy Ludford-Menting
- grid.416153.40000 0004 0624 1200ACRF Translational Research Laboratory, Royal Melbourne Hospital, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Medicine, University of Melbourne, Melbourne, VIC Australia
| | - Emma K. Link
- grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, VIC Australia ,grid.1055.10000000403978434Centre for Biostatistics and Clinical Trials, Peter MacCallum Cancer Centre, Melbourne, VIC Australia
| | - Jennifer H. Martin
- grid.266842.c0000 0000 8831 109XCentre for Drug Repurposing and Medicines Research, University of Newcastle, Callaghan, NSW Australia ,grid.413648.cHunter Medical Research Institute, Kookaburra Circuit, New Lambton Heights, NSW Australia
| | - Rachel Koldej
- grid.416153.40000 0004 0624 1200ACRF Translational Research Laboratory, Royal Melbourne Hospital, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Medicine, University of Melbourne, Melbourne, VIC Australia
| | - David Ritchie
- grid.416153.40000 0004 0624 1200ACRF Translational Research Laboratory, Royal Melbourne Hospital, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Medicine, University of Melbourne, Melbourne, VIC Australia ,grid.1055.10000000403978434Clinical Haematology, Peter MacCallum Cancer Centre and Royal Melbourne Hospital, Melbourne, VIC Australia
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Nandi S, Chennappan S, Andrasch Y, Fidan M, Engler M, Ahmad M, Tuckermann JP, Zenker M, Cirstea IC. Increased osteoclastogenesis contributes to bone loss in the Costello syndrome Hras G12V mouse model. Front Cell Dev Biol 2022; 10:1000575. [PMID: 36330334 PMCID: PMC9624175 DOI: 10.3389/fcell.2022.1000575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022] Open
Abstract
RAS GTPases are ubiquitous GDP/GTP-binding proteins that function as molecular switches in cellular signalling and control numerous signalling pathways and biological processes. Pathogenic mutations in RAS genes severely affect cellular homeostasis, leading to cancer when occurring in somatic cells and developmental disorders when the germline is affected. These disorders are generally termed as RASopathies and among them Costello syndrome (CS) is a distinctive entity that is caused by specific HRAS germline mutations. The majority of these mutations affect residues 12 and 13, the same sites as somatic oncogenic HRAS mutations. The hallmarks of the disease include congenital cardiac anomalies, impaired thriving and growth, neurocognitive impairments, distinctive craniofacial anomalies, and susceptibility to cancer. Adult patients often present signs of premature aging including reduced bone mineral density and osteoporosis. Using a CS mouse model harbouring a Hras G12V germline mutation, we aimed at determining whether this model recapitulates the patients’ bone phenotype and which bone cells are driving the phenotype when mutated. Our data revealed that Hras G12V mutation induces bone loss in mice at certain ages. In addition, we identified that bone loss correlated with an increased number of osteoclasts in vivo and Hras G12V mutations increased osteoclastogenesis in vitro. Last, but not least, mutant osteoclast differentiation was reduced by treatment in vitro with MEK and PI3K inhibitors, respectively. These results indicate that Hras is a novel regulator of bone homeostasis and an increased osteoclastogenesis due to Hras G12V mutation contributes to bone loss in the Costello syndrome.
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Affiliation(s)
- Sayantan Nandi
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | | | - Yannik Andrasch
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Miray Fidan
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Melanie Engler
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Mubashir Ahmad
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Jan P. Tuckermann
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Martin Zenker
- Institute of Human Genetics, University Hospital Magdeburg, Magdeburg, Germany
| | - Ion Cristian Cirstea
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
- *Correspondence: Ion Cristian Cirstea,
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Nguyen SV, Lanni D, Xu Y, Michaelson JS, McMenamin SK. Dynamics of the Zebrafish Skeleton in Three Dimensions During Juvenile and Adult Development. Front Physiol 2022; 13:875866. [PMID: 35721557 PMCID: PMC9204358 DOI: 10.3389/fphys.2022.875866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/06/2022] [Indexed: 12/24/2022] Open
Abstract
Zebrafish are a valuable model for normal vertebrate skeletogenesis and the study of myriad bone disorders. Bones grow, ossify and change shape throughout the zebrafish lifetime, and 3D technologies allow us to examine skeletogenic processes in detail through late developmental stages. To facilitate analysis of shape, orientation and tissue density of skeletal elements throughout ontogeny and adulthood, we generated a high-resolution skeletal reference dataset of wild-type zebrafish development. Using microCT technology, we produced 3D models of the skeletons of individuals ranging from 12 to 25 mm standard length (SL). We analyzed the dynamics of skeletal density and volume as they increase during juvenile and adult growth. Our resource allows anatomical comparisons between meristic units within an individual-e.g., we show that the vertebral canal width increases posteriorly along the spine. Further, structures may be compared between individuals at different body sizes: we highlight the shape changes that the lower jaw undergoes as fish mature from juvenile to adult. We show that even reproductively mature adult zebrafish (17-25 mm SL) continue to undergo substantial changes in skeletal morphology and composition with continued adult growth. We provide a segmented model of the adult skull and a series of interactive 3D PDFs at a range of key stages. These resources allow changes in the skeleton to be assessed quantitatively and qualitatively through late stages of development, and can serve as anatomical references for both research and education.
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Affiliation(s)
- Stacy V Nguyen
- Biology Department, Boston College, Chestnut Hill, MA, United States
| | - Dominic Lanni
- Biology Department, Vassar College, Poughkeepsie, NY, United States
| | - Yongqi Xu
- Biology Department, Boston College, Chestnut Hill, MA, United States
| | - James S Michaelson
- Department of Pathology, Massachusetts General Hospital, Boston, MA, United States
| | - Sarah K McMenamin
- Biology Department, Boston College, Chestnut Hill, MA, United States
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18
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Li T, Hadigan C, Whitlock JM, Qin J, Kumar J, Kumar P, Catalfamo M. IL-27 Modulates the Cytokine Secretion in the T Cell-Osteoclast Crosstalk During HIV Infection. Front Immunol 2022; 13:818677. [PMID: 35479090 PMCID: PMC9037094 DOI: 10.3389/fimmu.2022.818677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
In People with HIV (PWH), chronic immune activation and systemic inflammation are associated with increased risk to develop comorbidities including bone loss. Numerous cells of the immune system, namely, T cells are involved in the regulation of the bone homeostasis and osteoclasts (OCs) activity. IL-27, a cytokine that belongs to the IL-12 family can regulate the secretion of pro- and anti-inflammatory cytokines by T cells, however its role in the setting of HIV is largely unknown. In the present study, we determined the impact of OCs in T cell secretion of cytokines and whether IL-27 can regulate this function. We found that the presence of OCs in the T cell cultures significantly enhanced secretion of IFNγ, TNFα, IL-17, RANKL, and IL-10 in both PWH and healthy controls. In PWH, IL-27 inhibited IL-17 secretion and downregulated surface expression of RANKL in CD4 T cells. All together these results suggest that in the context of HIV infection IL-27 may favor IFNγ and TNFα secretion at the sites of bone remodeling.
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Affiliation(s)
- Tong Li
- Department of Microbiology and Immunology, Georgetown University School of Medicine, Washington, DC, United States
| | - Colleen Hadigan
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Jarred M. Whitlock
- Section on Membrane Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
| | - Jing Qin
- Biostatistics Research Branch, Division of Clinical Research (DCR), National Institutes of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Jai Kumar
- Division of Infectious Diseases and Travel Medicine, Georgetown University School of Medicine, Washington, DC, United States
| | - Princy Kumar
- Division of Infectious Diseases and Travel Medicine, Georgetown University School of Medicine, Washington, DC, United States
| | - Marta Catalfamo
- Department of Microbiology and Immunology, Georgetown University School of Medicine, Washington, DC, United States
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19
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Effects of local vs systemic administration of CXCR4 inhibitor AMD3100 on orthodontic tooth movement in rats. Am J Orthod Dentofacial Orthop 2022; 162:182-192. [DOI: 10.1016/j.ajodo.2021.03.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 12/16/2022]
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Klemmer VA, Khera N, Siegenthaler BM, Bhattacharya I, Weber FE, Ghayor C. Effect of N-Vinyl-2-Pyrrolidone (NVP), a Bromodomain-Binding Small Chemical, on Osteoblast and Osteoclast Differentiation and Its Potential Application for Bone Regeneration. Int J Mol Sci 2021; 22:ijms222011052. [PMID: 34681710 PMCID: PMC8541071 DOI: 10.3390/ijms222011052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/05/2021] [Accepted: 10/09/2021] [Indexed: 12/15/2022] Open
Abstract
The human skeleton is a dynamic and remarkably organized organ system that provides mechanical support and performs a variety of additional functions. Bone tissue undergoes constant remodeling; an essential process to adapt architecture/resistance to growth and mechanical needs, but also to repair fractures and micro-damages. Despite bone's ability to heal spontaneously, certain situations require an additional stimulation of bone regeneration, such as non-union fractures or after tumor resection. Among the growth factors used to increase bone regeneration, bone morphogenetic protein-2 (BMP2) is certainly the best described and studied. If clinically used in high quantities, BMP2 is associated with various adverse events, including fibrosis, overshooting bone formation, induction of inflammation and swelling. In previous studies, we have shown that it was possible to reduce BMP2 doses significantly, by increasing the response and sensitivity to it with small molecules called "BMP2 enhancers". In the present study, we investigated the effect of N-Vinyl-2-pyrrolidone (NVP) on osteoblast and osteoclast differentiation in vitro and guided bone regeneration in vivo. We showed that NVP increases BMP2-induced osteoblast differentiation and decreases RANKL-induced osteoclast differentiation in a dose-dependent manner. Moreover, in a rabbit calvarial defect model, the histomorphometric analysis revealed that bony bridging and bony regenerated area achieved with NVP-loaded poly (lactic-co-glycolic acid (PLGA) membranes were significantly higher compared to unloaded membranes. Taken together, our results suggest that NVP sensitizes BMP2-dependent pathways, enhances BMP2 effect, and inhibits osteoclast differentiation. Thus, NVP could prove useful as "osteopromotive substance" in situations where a high rate of bone regeneration is required, and in the management of bone diseases associated with excessive bone resorption, like osteoporosis.
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Affiliation(s)
- Viviane A. Klemmer
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
| | - Nupur Khera
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
| | - Barbara M. Siegenthaler
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
| | - Indranil Bhattacharya
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
| | - Franz E. Weber
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
- Center for Applied Biotechnology and Molecular Medicine, University of Zurich, 8057 Zurich, Switzerland
- Correspondence: (F.E.W.); (C.G.)
| | - Chafik Ghayor
- Oral Biotechnology and Bioengineering, Center for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (V.A.K.); (N.K.); (B.M.S.); (I.B.)
- Correspondence: (F.E.W.); (C.G.)
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21
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Hu R, Chen L, Chen X, Xie Z, Xia C, Chen Y. Aloperine improves osteoporosis in ovariectomized mice by inhibiting RANKL-induced NF-κB, ERK and JNK approaches. Int Immunopharmacol 2021; 97:107720. [PMID: 33945918 DOI: 10.1016/j.intimp.2021.107720] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/31/2021] [Accepted: 04/21/2021] [Indexed: 12/13/2022]
Abstract
Presently, postmenopausal osteoporosis mainly caused by excessive activation of in vivo osteoclasts has become a global public health burden. Natural compounds have gradually become the potential drugs for the treatment of postmenopausal osteoporosis. Aloperine is a new alkaloid extracted from the leaves and seeds of sophora bean. The current studies have proved that aloperine has many biological activities, including anti-inflammatory, antiviral and anticancer activities. This study shows that aloperine can inhibit activity and formation of osteoclast mediated by RANKL in a dose-dependent manner without affecting the activity of bone marrow macrophages (BMM). In addition, it is found that aloperine can inhibit the expression of osteoclast specific marker genes, including nuclear factor of activated T cells cytoplasmic 1 (NFATc1), tartrate resistant acid phosphatase (TRAcP), matrix metallopeptidase 9 (MMP9), cathepsin K (Ctsk), V-ATPase d2 and calcitonin receptor. The in vitro experiment of aloperine proved that aloperine can inhibit the degradation of IκBα and the phosphorylation of P65, ERK and JNK. Additionally, aloperine improves bone loss in ovariectomized (OVX) mice by inhibiting osteoclast activity. This project proved that aloperine can affect the formation of osteoclasts by inhibiting RANKL signaling channel, and it is indicated that aloperine has the potential to be developed as a new drug for the prevention and treatment of postmenopausal osteoporosis.
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Affiliation(s)
- Rong Hu
- Department of Radiology, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China
| | - Libo Chen
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China
| | - Xiaolong Chen
- Department of Radiology, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China
| | - Zhong Xie
- Department of Spinal Surgery, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China
| | - Chao Xia
- Department of Spinal Surgery, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China
| | - Yong Chen
- Department of Spinal Surgery, the First Affiliated Hospital, University of South China, Hengyang, Hunan 421000, China.
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22
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Jarrar H, Çetİn Altindal D, GÜmÜŞderelİoĞlu M. The inhibitory effect of melatonin on osteoclastogenesis of RAW 264.7 cells in low concentrations of RANKL and MCSF. ACTA ACUST UNITED AC 2020; 44:427-436. [PMID: 33402869 PMCID: PMC7759193 DOI: 10.3906/biy-2007-85] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 10/06/2020] [Indexed: 12/20/2022]
Abstract
RAW 264.7 cells are one of the most recommended cell lines for investigating the activity and differentiation of osteoclasts. These cells differentiate into osteoclasts in the presence of two critical components: receptor activator of nuclear factor kappa B ligand (RANKL) and macrophage colony stimulating factor (MCSF). Melatonin (MEL) hormone has recently become one of the small molecules used in the field of bone regeneration and bone disease treatment, as it has the ability to inhibit the differentiation of osteoclasts directly by suppression of the NF-κB signaling pathway. The main aim of the current study is to determine sufficient RANKL/MCSF concentrations for differentiation of the cells to osteoclasts and to describe the repressive effect of MEL on the osteoclastogenesis of these cells. In this regard, it was found that 10 ng/mL of RANKL- and MCSF-containing medium is suitable for inducing osteoclastogenesis of the cells. In addition, melatonin at doses in the range of 100-1000 µM does not have a cytotoxic effect. Subsequently, results of tartrate resistant acid phosphatase (TRAP) activity, TRAP staining, and relative expressions of cathepsin K, nuclear factor of activated T cells one (NFATC1), and TRAP genes showed a suppressive effect of MEL -especially 800 µM- on RANKL-induced osteoclastogenesis of these cells.
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Affiliation(s)
- Hala Jarrar
- Bioengineering Division, Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Ankara Turkey
| | - Damla Çetİn Altindal
- Bioengineering Division, Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Ankara Turkey
| | - Menemşe GÜmÜŞderelİoĞlu
- Bioengineering Division, Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Ankara Turkey
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23
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Wei Y, Liu Z, Zhu X, Jiang L, Shi W, Wang Y, Xu N, Gang F, Wang X, Zhao L, Lin J, Sun X. Dual directions to address the problem of aseptic loosening via electrospun PLGA @ aspirin nanofiber coatings on titanium. Biomaterials 2020; 257:120237. [PMID: 32738656 DOI: 10.1016/j.biomaterials.2020.120237] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 01/12/2023]
Abstract
Peri-implant aseptic inflammation and osteolysis can cause aseptic loosening, leading to the failure of implants. Therefore, aseptic loosening of orthopedic implants remains an imminent problem for the development of durable and effective implants. In this work, a common anti-inflammatory drug (aspirin, ASA) was loaded in poly(lactic-co-glycolic acid) (PLGA) to construct nanofiber coatings on titanium (Ti) via electrospinning. The adhesion of the nanofiber coatings to Ti was ensured by polydopamine (PDA) modification. A stable and sustainable release of aspirin from the nanofiber coatings could last up to 60 days. Such electrospun PLGA@ASA nanofiber coatings could promote proliferation and osteogenic differentiation of bone mesenchymal stem cells (BMSCs) as well as inhibit M1 polarization and RANKL-induced osteoclast differentiation of macrophages in vitro. These results indicated that this facile formulation of the PLGA@ASA nanofiber coatings for long-term drug release could be expected to address the problem of aseptic loosening effectively in dual directions of both anti-inflammation and improving osseointegration simultaneously. Notably, the in vivo experiments demonstrated that PLGA@ASA nanofiber coatings did promote osseointegration ability of Ti implants significantly, even in challenging condition with wear particles, and also effectively inhibited Ti particle induced osteolysis around the implants. This work indicates a promising way for the development of durable and effective implants by using PLGA@ASA-PDA-Ti to address the problem of aseptic loosening in dual directions.
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Affiliation(s)
- Yaojie Wei
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Zhongqun Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Xu Zhu
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215000, People's Republic of China
| | - Le Jiang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Weidong Shi
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215000, People's Republic of China
| | - Yingjin Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Nan Xu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Fangli Gang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; College of Chemistry & Pharmacy, Shaanxi Key Laboratory of Natural Products & Chemical Biology, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Lingyun Zhao
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Jun Lin
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215000, People's Republic of China.
| | - Xiaodan Sun
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China; Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China.
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24
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Yun B, Maburutse BE, Kang M, Park MR, Park DJ, Kim Y, Oh S. Short communication: Dietary bovine milk-derived exosomes improve bone health in an osteoporosis-induced mouse model. J Dairy Sci 2020; 103:7752-7760. [PMID: 32622594 DOI: 10.3168/jds.2019-17501] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
Osteoporosis is a systemic skeletal disease characterized by low bone mass and micro-architectural deterioration of bone tissue, with a consequent increase in bone fragility and fracture susceptibility. In an aged society with increased life expectancy, the incidence rate of osteoporosis is also rapidly increasing. Inadequate nutrition may negatively influence bone metabolism. Recently, many studies have investigated the functionality of milk-derived exosomes, which play important roles in cell-to-cell communication. However, there are few reports of how milk-derived exosomes influence osteoblast proliferation and differentiation. Here, we determined whether bovine colostrum-derived exosomes promote anti-osteoporosis in vitro and in vivo. Tartrate-resistant acid phosphatase-stained cells were significantly inhibited in Raw264.7 cells treated with exosomes, indicating reduced osteoclast differentiation. We induced osteoporosis in mice using glucocorticoid pellets after orally administering exosomes for 2 mo. Interestingly, the bone mineral density of exosome-fed mouse groups was significantly improved compared with the glucocorticoid-induced osteoporosis group without exosome treatment. In addition, Lactobacillus were decreased in the gut microbiota community of osteoporosis-induced mice, but the gut microbiota community composition was effectively restored by exosome intake. Taken together, we propose that exosomes isolated from bovine colostrum could be a potential candidate for osteoporosis prevention, bone remodeling improvement, and inhibition of bone resorption. To our knowledge, this is the first time that a protective effect of milk exosomes against osteoporosis has been demonstrated in vivo. Our results strongly suggest that bovine colostrum exosomes might be used as a prophylaxis to prevent the onset of osteoporosis. Indeed, our results offer promising alternative strategies in the nutritional management of age-related bone complications.
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Affiliation(s)
- B Yun
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 54896, Korea
| | - B E Maburutse
- Department of Animal Sciences and Health, Marondera University of Agricultural Sciences and Health, PO Box 35, Marondera, Zimbabwe
| | - M Kang
- Department of Functional Food and Biotechnology, Jeonju University, Jeonju 55069, Korea
| | - M R Park
- Department of Pharmacology and System Physiology, University of Cincinnati, OH 45267
| | - D J Park
- Korea Food Research Institute, Jeollabuk-do 55365, Korea
| | - Y Kim
- Department of Agricultural Biotechnology and Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul 08826, Korea.
| | - S Oh
- Department of Functional Food and Biotechnology, Jeonju University, Jeonju 55069, Korea.
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25
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Simfia I, Schiavi J, McNamara LM. Alterations in osteocyte mediated osteoclastogenesis during estrogen deficiency and under ROCK-II inhibition: An in vitro study using a novel postmenopausal multicellular niche model. Exp Cell Res 2020; 392:112005. [PMID: 32330507 DOI: 10.1016/j.yexcr.2020.112005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/02/2020] [Accepted: 04/09/2020] [Indexed: 01/03/2023]
Abstract
This study sought to derive an enhanced understanding of the complex intracellular interactions that drive bone loss in postmenopausal osteoporosis. We applied an in-vitro multicellular niche to recapitulate cell-cell signalling between osteocytes, osteoblasts and osteoclasts to investigate (1) how estrogen-deficient and mechanically loaded osteocytes regulate osteoclastogenesis and (2) whether ROCK-II inhibition affects these mechanobiological responses. We report that mechanically stimulated and estrogen-deficient osteocytes upregulated RANKL/OPG and M-CSF gene expression, when compared to those treated with 10 nM estradiol. Osteoclast precursors (RAW 264.7) cultured within this niche underwent significant reduction in osteoclastogenic gene expression (CTSK), and there was an increasing trend in the area covered by TRAP+ osteoclasts (24% vs. 19.4%, p = 0.06). Most interestingly, upon treatment with the ROCK-II inhibitor, RANKL/OPG and M-CSF gene expression by estrogen-deficient osteocytes were downregulated. Yet, this inhibition of the pro-osteoclastogenic factors by osteocytes did not ultimately reduce the differentiation of osteoclast precursors. Indeed, TRAP and CTSK gene expressions in osteoclast precursors were upregulated, and there was an increased trend for osteoclast area (30.4% vs. 24%, p = 0.07), which may have been influenced by static osteoblasts (MC3T3-E1) that were included in the niche. We conclude that ROCK-II inhibition can attenuate bone loss driven by osteocytes during estrogen deficiency.
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Affiliation(s)
- Irene Simfia
- Mechanobiology and Medical Device Research Group, Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland Galway, Galway, Ireland
| | - Jessica Schiavi
- Mechanobiology and Medical Device Research Group, Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland Galway, Galway, Ireland
| | - Laoise M McNamara
- Mechanobiology and Medical Device Research Group, Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland Galway, Galway, Ireland.
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26
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Substituted 1-methyl-4-phenylpyrrolidin-2-ones – Fragment-based design of N-methylpyrrolidone-derived bromodomain inhibitors. Eur J Med Chem 2020; 191:112120. [DOI: 10.1016/j.ejmech.2020.112120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/16/2020] [Accepted: 02/03/2020] [Indexed: 01/12/2023]
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27
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The Release of the Bromodomain Ligand N,N-Dimethylacetamide Adds Bioactivity to a Resorbable Guided Bone Regeneration Membrane in a Rabbit Calvarial Defect Model. MATERIALS 2020; 13:ma13030501. [PMID: 31973011 PMCID: PMC7040842 DOI: 10.3390/ma13030501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/08/2020] [Accepted: 01/14/2020] [Indexed: 12/23/2022]
Abstract
N,N-Dimethylacetamide (DMA) is FDA approved as an excipient and is used as drug-delivery vehicle. Due to its amphipathic nature and diverse bioactivities, it appears to be a good combination of biodegradable poly-lactide-co-glycolide (PLGA)-based guided bone regeneration membranes. Here we show that the solvent DMA can be loaded to PLGA membranes by different regimes, leading to distinct release profiles, and enhancing the bone regeneration in vivo. Our results highlight the potential therapeutic benefits of DMA in guided bone regeneration procedures, in combination with biodegradable PLGA membranes.
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28
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Hilton-Proctor J, Ilyichova O, Zheng Z, Jennings I, Johnstone R, Shortt J, Mountford S, Scanlon M, Thompson P. Synthesis and elaboration of N-methylpyrrolidone as an acetamide fragment substitute in bromodomain inhibition. Bioorg Med Chem 2019; 27:115157. [DOI: 10.1016/j.bmc.2019.115157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 01/24/2023]
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Cheng CF, Chien-Fu Lin J, Tsai FJ, Chen CJ, Chiou JS, Chou CH, Li TM, Lin TH, Liao CC, Huang SM, Li JP, Lin JC, Lin CC, Ban B, Liang WM, Lin YJ. Protective effects and network analysis of natural compounds obtained from Radix dipsaci, Eucommiae cortex, and Rhizoma drynariae against RANKL-induced osteoclastogenesis in vitro. JOURNAL OF ETHNOPHARMACOLOGY 2019; 244:112074. [PMID: 31291608 DOI: 10.1016/j.jep.2019.112074] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 07/04/2019] [Accepted: 07/06/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Osteoporosis is one of the most common bone diseases; it is characterized by bone loss and is a risk factor for hip fracture. Chinese herbal medicines (CHMs) and their related natural compounds have been used for treating many diseases, including bone diseases, since ancient times in China and are regarded as a cost-effective complementary therapy. AIM OF THE STUDY The goal of this study was to investigate the osteoprotective mechanisms of these three Chinese herbs and their related natural compounds. The effects of CHMs and related natural compounds on RANKL-induced osteoclastogenesis in vitro were investigated. MATERIALS AND METHODS A network pharmacology method was applied to study CHM-related natural compounds and their osteoporosis targets. In addition, their effect on RANKL-induced osteoclastogenesis in RAW264.7 cells was also investigated in vitro. RESULTS Radix dipsaci, Eucommiae cortex, and Rhizoma drynariae exhibited protective effects against mortality in hip fracture patients. Furthermore, these three herbs inhibited RANKL-induced TRAP activities and reduced the expression of bone resorption-related genes in RAW264.7 cells. Network analysis of natural compound (ingredient)-target interactions identified 11 natural compounds. Signal pathway analyses suggested that these compounds may target cytokine-cytokine receptor interactions, including RANKL-induced osteoclastogenesis. Five novel natural compounds exhibited reduced RANKL-induced TRAP activities and bone resorption-related gene expression. CONCLUSION The clinically used CHMs, Radix dipsaci, Eucommiae cortex, and Rhizoma drynariae, and natural compounds obtained from them may suppress RANKL-induced osteoclastogenesis in vitro.
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Affiliation(s)
- Chi-Fung Cheng
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan.
| | - Jeff Chien-Fu Lin
- Department of Statistics, National Taipei University, Taipei, Taiwan; Department of Orthopedic Surgery, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
| | - Fuu-Jen Tsai
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Chinese Medicine, China Medical University, Taichung, Taiwan; Department of Biotechnology and Bioinformatics, Asia University, Taichung, Taiwan.
| | - Chao-Jung Chen
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan.
| | - Jian-Shiun Chiou
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan.
| | - Chen-Hsing Chou
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan.
| | - Te-Mao Li
- School of Chinese Medicine, China Medical University, Taichung, Taiwan.
| | - Ting-Hsu Lin
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Chiu-Chu Liao
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Shao-Mei Huang
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Ju-Pi Li
- School of Chinese Medicine, China Medical University, Taichung, Taiwan; Rheumatism Research Center, China Medical University Hospital, Taichung, Taiwan.
| | - Jung-Chun Lin
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan.
| | - Chih-Chien Lin
- Department of Cosmetic Science, Providence University, Taichung, Taiwan.
| | - Bo Ban
- Chinese Research Center for Behavior Medicine in Growth and Development, 89 Guhuai Road, Jining, Shandong, China.
| | - Wen-Miin Liang
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan.
| | - Ying-Ju Lin
- Genetic Center, Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Chinese Medicine, China Medical University, Taichung, Taiwan.
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Chen TH, Weber FE, Malina-Altzinger J, Ghayor C. Epigenetic drugs as new therapy for tumor necrosis factor-α-compromised bone healing. Bone 2019; 127:49-58. [PMID: 31152802 DOI: 10.1016/j.bone.2019.05.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/20/2019] [Accepted: 05/27/2019] [Indexed: 02/07/2023]
Abstract
Impaired bone regeneration by excess inflammation leads to failure of bone healing. Current therapies display limited benefits making new treatments imperative. Our recent discoveries of the anti-inflammatory characteristics of bromodomain and extra terminal domain (BET) inhibitors, N-methylpyrrolidone (NMP) and N,N-Dimethylacetamide (DMA), implicate possible therapeutic use of epigenetic drugs in inflammation-impaired bone healing. Here, we investigated the effects of NMP and DMA on osteogenesis in vitro and ex vivo under the influence of TNFα, a key cytokine responsible for impaired fracture healing. NMP and DMA pre-treatment recovered TNFα-inhibited expression of essential osteoblastic genes, Alp, Runx2, and Osterix as well as mineralization in multipotent stem cells, but not in pre-osteoblasts and calvarial osteoblasts. The mechanism of action involves the recovery of TNFα-suppressed BMP-induced Smad signaling and the reduction of TNFα-triggered ERK pathway. In addition, ERK inhibitor treatment diminished the effect of TNFα on osteogenesis, which reinforces the role of ERK pathway in the adverse effect of TNFα. Furthermore, endochondral ossification was analyzed in an ex vivo bone culture model. TNFα largely abrogated BMP-promoted growth of mineralized bone while pre-treatment of NMP and DMA prevented the deleterious effect of TNFα. Taken together, these data shed light on developing low- affinity epigenetic drugs as new therapies for inflammation-compromised bone healing.
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Affiliation(s)
- Tse-Hsiang Chen
- University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse11, 8032 Zürich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland
| | - Franz E Weber
- University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse11, 8032 Zürich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland; CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zürich, Switzerland
| | - Johann Malina-Altzinger
- Limmat Cleft and Craniofacial Centre, Zürich MKG, Hardturmstrasse 133, 8005 Zürich, Switzerland
| | - Chafik Ghayor
- University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse11, 8032 Zürich, Switzerland.
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Maksylewicz A, Bysiek A, Lagosz KB, Macina JM, Kantorowicz M, Bereta G, Sochalska M, Gawron K, Chomyszyn-Gajewska M, Potempa J, Grabiec AM. BET Bromodomain Inhibitors Suppress Inflammatory Activation of Gingival Fibroblasts and Epithelial Cells From Periodontitis Patients. Front Immunol 2019; 10:933. [PMID: 31114581 PMCID: PMC6503739 DOI: 10.3389/fimmu.2019.00933] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 04/11/2019] [Indexed: 12/11/2022] Open
Abstract
BET bromodomain proteins are important epigenetic regulators of gene expression that bind acetylated histone tails and regulate the formation of acetylation-dependent chromatin complexes. BET inhibitors suppress inflammatory responses in multiple cell types and animal models, and protect against bone loss in experimental periodontitis in mice. Here, we analyzed the role of BET proteins in inflammatory activation of gingival fibroblasts (GFs) and gingival epithelial cells (GECs). We show that the BET inhibitors I-BET151 and JQ1 significantly reduced expression and/or production of distinct, but overlapping, profiles of cytokine-inducible mediators of inflammation and bone resorption in GFs from healthy donors (IL6, IL8, IL1B, CCL2, CCL5, COX2, and MMP3) and the GEC line TIGK (IL6, IL8, IL1B, CXCL10, MMP9) without affecting cell viability. Activation of mitogen-activated protein kinase and nuclear factor-κB pathways was unaffected by I-BET151, as was the histone acetylation status, and new protein synthesis was not required for the anti-inflammatory effects of BET inhibition. I-BET151 and JQ1 also suppressed expression of inflammatory cytokines, chemokines, and osteoclastogenic mediators in GFs and TIGKs infected with the key periodontal pathogen Porphyromonas gingivalis. Notably, P. gingivalis internalization and intracellular survival in GFs and TIGKs remained unaffected by BET inhibitors. Finally, inhibition of BET proteins significantly reduced P. gingivalis-induced inflammatory mediator expression in GECs and GFs from patients with periodontitis. Our results demonstrate that BET inhibitors may block the excessive inflammatory mediator production by resident cells of the gingival tissue and identify the BET family of epigenetic reader proteins as a potential therapeutic target in the treatment of periodontal disease.
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Affiliation(s)
- Anna Maksylewicz
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Agnieszka Bysiek
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Katarzyna B Lagosz
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Justyna M Macina
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Malgorzata Kantorowicz
- Department of Periodontology and Oral Medicine, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Grzegorz Bereta
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Maja Sochalska
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Katarzyna Gawron
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Maria Chomyszyn-Gajewska
- Department of Periodontology and Oral Medicine, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Jan Potempa
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland.,Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, United States
| | - Aleksander M Grabiec
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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Okada M, Matsuura T, Akizuki T, Hoshi S, Shujaa Addin A, Fukuba S, Izumi Y. Ridge preservation of extraction sockets with buccal bone deficiency using poly lactide‐co‐glycolide coated β‐tricalcium phosphate bone grafts: An experimental study in dogs. J Periodontol 2019; 90:1014-1022. [DOI: 10.1002/jper.18-0574] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Munehiro Okada
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Takanori Matsuura
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
- PeriodonticsDental HospitalTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Tatsuya Akizuki
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
- PeriodonticsDental HospitalTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Shu Hoshi
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Ammar Shujaa Addin
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Shunsuke Fukuba
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
| | - Yuichi Izumi
- Department of PeriodontologyGraduate School of Medical and Dental SciencesTokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
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The Bromodomain Inhibitor N-Methyl pyrrolidone Prevents Osteoporosis and BMP-Triggered Sclerostin Expression in Osteocytes. Int J Mol Sci 2018; 19:ijms19113332. [PMID: 30366476 PMCID: PMC6275050 DOI: 10.3390/ijms19113332] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/09/2018] [Accepted: 10/23/2018] [Indexed: 12/13/2022] Open
Abstract
(1) Background: In an adult skeleton, bone is constantly renewed in a cycle of bone resorption, followed by bone formation. This coupling process, called bone remodeling, adjusts the quality and quantity of bone to the local needs. It is generally accepted that osteoporosis develops when bone resorption surpasses bone formation. Osteoclasts and osteoblasts, bone resorbing and bone forming cells respectively, are the major target in osteoporosis treatment. Inside bone and forming a complex network, the third and most abundant cells, the osteocytes, have long remained a mystery. Osteocytes are responsible for mechano-sensation and -transduction. Increased expression of the osteocyte-derived bone inhibitor sclerostin has been linked to estrogen deficiency-induced osteoporosis and is therefore a promising target for osteoporosis management. (2) Methods: Recently we showed in vitro and in vivo that NMP (N-Methyl-2-pyrrolidone) is a bioactive drug enhancing the BMP-2 (Bone Morphogenetic Protein 2) induced effect on bone formation while blocking bone resorption. Here we tested the effect of NMP on the expression of osteocyte-derived sclerostin. (3) Results: We found that NMP significantly decreased sclerostin mRNA and protein levels. In an animal model of osteoporosis, NMP prevented the estrogen deficiency-induced increased expression of sclerostin. (4) Conclusions: These results support the potential of NMP as a novel therapeutic compound for osteoporosis management, since it preserves bone by a direct interference with osteoblasts and osteoclasts and an indirect one via a decrease in sclerostin expression by osteocytes.
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Zhu X, Wang L, Teng X, Chen Q, Pan C. N-Methyl Pyrrolidone (NMP) Alleviates Lipopolysaccharide (LPS)-Induced Inflammatory Injury in Articular Chondrocytes. Med Sci Monit 2018; 24:6480-6488. [PMID: 30218608 PMCID: PMC6151968 DOI: 10.12659/msm.910050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background Studies on the chondrocyte inflammatory injury are very important for understanding the pathogenesis and clinical treatment of osteoarthritis (OA). Evidence suggests that N-methyl pyrrolidone (NMP) may be used as an adjuvant therapy alongside established methods of OA treatment. This study investigated the effect of NMP on chondrocyte inflammatory injury and explored the underlying molecular mechanism. Material/Methods To mimic the inflammatory injury in vitro, the articular chondrocyte line ATDC5 was simulated with lipopolysaccharide (LPS). ATDC5 cells were treated with various concentrations of NMP (0, 5, and 10 nM). Cell viability was measured using CCK-8 assay; cell apoptosis was detected using FCM; related protein and mRNA expressions were determined using Western blot assay and qRT-PCR assay; and inflammatory factors (tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and IL-8) productions were measured by performing ELISA assay. Results The results showed that LPS simulation repressed ATDC5 cell viability, prompted cell apoptosis, and enhanced the secretion of inflammatory factors. NMP treatment reduced inflammatory injury induced by LPS in a dose-dependent manner. Furthermore, NMP inhibited the activation of JNK and p38 pathways. In addition, inhibition of NF-κB activation was observed following NMP treatment. Conclusions NMP prevents inflammatory reaction of articular chondrocytes via repressing the MAPK/NF-κB pathway. Our findings provide a promising therapeutic agent for OA treatment.
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Affiliation(s)
- Xianping Zhu
- Department of Orthopaedics, Taizhou Central Hospital (Affiliated Hospital of Taizhou University), Taizhou, Zhejiang, China (mainland)
| | - Lin Wang
- Department of Anesthesiology, Taizhou Central Hospital (Affiliated Hospital of Taizhou University), Taizhou, Zhejiang, China (mainland)
| | - Xiao Teng
- Department of Orthopedics, Taizhou Central Hospital (Affiliated Hospital of Taizhou University), Taizhou, Zhejiang, China (mainland)
| | - Qi Chen
- Department of Laboratory Medicine, Taizhou Central Hospital (Affiliated Hospital of Taizhou University), Taizhou, Zhejiang, China (mainland)
| | - Chenshuai Pan
- Department of Orthopedics, Taizhou Central Hospital (Affiliated Hospital of Taizhou University), Taizhou, Zhejiang, China (mainland)
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Chen K, Lv ZT, Cheng P, Zhu WT, Liang S, Yang Q, Parkman VJA, Zhou CH, Jing XZ, Liu H, Wang YT, Lin H, Liao H, Chen AM. Boldine Ameliorates Estrogen Deficiency-Induced Bone Loss via Inhibiting Bone Resorption. Front Pharmacol 2018; 9:1046. [PMID: 30271347 PMCID: PMC6146032 DOI: 10.3389/fphar.2018.01046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 08/27/2018] [Indexed: 12/31/2022] Open
Abstract
Osteoporosis is an enormous health problem caused by the imbalance between bone resorption and bone formation. The current therapeutic strategies for osteoporosis still have some limitations. Boldine, an alkaloid isolated from Peumus boldus, has been shown to have antioxidant and anti-inflammatory effects in vivo. For the first time, we discover that boldine has a protective effect for the estrogen deficiency-induced bone loss in mice. According to the Micro-CT and histomorphometry assays, boldine conducts this protective effect through inhibiting bone resorption without affecting bone formation in vivo. Moreover, we showed that boldine can inhibit receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclast formation via impairing the AKT signaling pathways, while SC79 (an AKT agonist) partially rescue this effect. In conclusion, our results suggest that boldine can prevent estrogen deficiency-induced osteoporosis by inhibiting osteoclastogenesis. Thus, boldine may be served as a novel therapeutic agent for anti-osteoporotic therapy.
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Affiliation(s)
- Kun Chen
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, MA, United States
| | - Zheng-tao Lv
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Cheng
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen-tao Zhu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shuang Liang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Yang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Virginia-Jeni Akila Parkman
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, MA, United States
| | - Chen-he Zhou
- Department of Orthopaedic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xing-zhi Jing
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Liu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-ting Wang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Lin
- Department of Orthopaedic Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Liao
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - An-min Chen
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Doss HM, Samarpita S, Ganesan R, Rasool M. Ferulic acid, a dietary polyphenol suppresses osteoclast differentiation and bone erosion via the inhibition of RANKL dependent NF-κB signalling pathway. Life Sci 2018; 207:284-295. [PMID: 29908722 DOI: 10.1016/j.lfs.2018.06.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/11/2018] [Accepted: 06/13/2018] [Indexed: 12/31/2022]
Abstract
AIMS Bone erosion induced by enhanced osteoclast formation is a debilitating pathological phenomenon in rheumatoid arthritis (RA). Recent finding has revealed that ferulic acid is associated with reduced osteoclast differentiation and bone erosion. However, the underlying mechanism through which ferulic acid inhibited osteoclast differentiation and bone erosion still remains to be elucidated. This study assessed the therapeutic effects of ferulic acid on osteoclast differentiation and bone erosion by targeting RANKL dependent NF-κB pathway. MAIN METHODS RAW 264.7 monocyte/macrophage cells were left untreated/treated with 25, 50 and 100 μM ferulic acid prior to stimulation with/without RANKL and M-CSF. Osteoclast differentiation and formation was assessed by SEM and TRAP analysis whereas its functional activity of bone erosion was determined by pit formation assay. Crucial transcription factors (NF-κBp-65, NFATc1 and c-Fos) and osteoclast specific genes (TRAP, MMP-9 and Cathepsin K) were evaluated by quantitative RT-PCR. Further, the protein level expression of NF-κBp-65, NFAtc1, c-Fos and MMP-9 was assessed using western blot analysis. KEY FINDINGS Our results demonstrated that ferulic acid significantly attenuated RANKL induced osteoclast differentiation as evidenced from SEM and TRAP staining analysis. A remarkable decrease in the bone resorption activity of osteoclasts was also noticed upon ferulic acid treatment. In addition, the down-regulation of RANKL induced NF-κB activation and its associated downstream factors like NFATc1, c-Fos, TRAP, Cathepsin K and MMP-9 was also observed upon ferulic acid treatment. SIGNIFICANCE Thus, our findings evidence the anti-stimulatory and anti-resorptive role of ferulic acid via the inhibition of RANKL dependent NF-κB signalling pathway.
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Affiliation(s)
- Hari Madhuri Doss
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamilnadu, India
| | - Snigdha Samarpita
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamilnadu, India
| | - Ramamoorthi Ganesan
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamilnadu, India
| | - Mahaboobkhan Rasool
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamilnadu, India.
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Wijekoon HMS, Bwalya EC, Fang J, Kim S, Hosoya K, Okumura M. Inhibitory effects of sodium pentosan polysulfate on formation and function of osteoclasts derived from canine bone marrow. BMC Vet Res 2018; 14:152. [PMID: 29720166 PMCID: PMC5930774 DOI: 10.1186/s12917-018-1466-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 04/20/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Sodium pentosan polysulfate (NaPPS) was testified as a chondroprotective drug in with a detailed rationale of the disease-modifying activity. This study was undertaken to determine whether anti-osteoarthritis drug, NaPPS inhibited osteoclasts (OC) differentiation and function. Canine bone marrow mononuclear cells (n = 6) were differentiated to OC by maintaining with receptor activator of nuclear factor kappa B ligand (RANKL) and macrophage colony-stimulating factor (M-CSF) for up to 7 days with the treatment of NaPPS at concentration of 0, 0.2, 1 and 5 μg/mL. Differentiation and function of OC were accessed using tartrate-resistant acid phosphate (TRAP) staining and bone resorption assay, while monitoring actin ring formation. Invasion and colocalization patterns of fluorescence-labeled NaPPS with transcribed gene in OC were monitored. Gene expression of OC for cathepsin K (CTK), matrix metallopeptidase-9 (MMP-9), nuclear factor of activated T-cells cytoplasmic 1 (NFATc1), c-Fos, activator protein-1(AP-1) and carbonic anhydrase II was examined using real-time PCR. RESULTS Significant inhibition of OC differentiation was evident at NaPPS concentration of 1 and 5 μg/mL (p < 0.05). In the presence of 0.2 to 5 μg/mL NaPPS, bone resorption was attenuated (p < 0.05), while 1 and 5 μg/mL NaPPS achieved significant reduction of actin ring formation. Intriguingly, fluorescence-labeled NaPPS invaded in to cytoplasm and nucleus while colocalizing with actively transcribed gene. Gene expression of CTK, MMP-9 and NFATc1 were significantly inhibited at 1 and 5 μg/mL (p < 0.05) of NaPPS whereas inhibition of c-Fos and AP-1 was identified only at concentration of 5 μg/mL (p < 0.05). CONCLUSIONS Taken together, all the results suggest that NaPPS is a novel inhibitor of RANKL and M-CSF-induced CTK, MMP-9, NFATc1, c-Fos, AP-1 upregulation, OC differentiation and bone resorption which might be a beneficial for treatment of inflammatory joint diseases and other bone diseases associated with excessive bone resorption.
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Affiliation(s)
- H. M. Suranji Wijekoon
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
| | - Eugene C. Bwalya
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
| | - Jing Fang
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
| | - Sangho Kim
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
| | - Kenji Hosoya
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
| | - Masahiro Okumura
- Department of Veterinary Clinical Sciences, Laboratory of Veterinary Surgery, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818 Japan
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Bian J, Cao D, Shen J, Jiang B, Chen D, Bian L. N-methyl pyrrolidone promotes ankle fracture healing by inhibiting inflammation via suppression of the mitogen-activated protein kinase signaling pathway. Exp Ther Med 2018; 15:3617-3622. [PMID: 29545891 DOI: 10.3892/etm.2018.5842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 11/15/2017] [Indexed: 01/22/2023] Open
Abstract
N-methyl pyrrolidone (NMP), a small bioactive molecule, has the potential to stimulate bone formation and inhibit osteoclast differentiation. The aim of the present study was to investigate the effect of NMP on the inflammatory response and underlying molecular mechanisms in MG-63 cells. The mRNA and protein expression of cytokines from peripheral blood in children with or without ankle fracture were determined by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and ELISA, respectively. MG-63 cells were pre-treated with/without NMP and stimulated with 1 µM bradykinin (BK). The production of cytokines from MG-63 cells was assessed by western blotting and RT-qPCR. The expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) mRNA and protein were measured using western blotting and/or RT-qPCR. Western blotting was used to examine the activation level of mitogen activated protein kinase. Compared with healthy children, levels of tumor necrosis factor (TNF-α), interleukin (IL)-1β and IL-6 mRNA and protein were upregulated in children with ankle fracture. NMP treatment did not induce cytotoxicity in MG-63 cells. The BK-induced upregulation of TNF-α, IL-1β, IL-6, iNOS and COX-2 mRNA and protein was reversed in a dose-dependent manner by NMP. Furthermore, NMP downregulated the activation of c-Jun NH2-terminal kinase and p38 pathways, but not the extracellular signal-related kinase pathway. Therefore, the results of the current study demonstrate that NMP inhibits inflammation dependent on the mitogen-activated protein kinase pathway in MG-63 cells, indicating that it may be beneficial in the healing of fractures.
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Affiliation(s)
- Jun Bian
- Department of Orthopedic, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Dan Cao
- Department of Orthopedic, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Jie Shen
- Department of Orthopedic, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Bo Jiang
- Department of Orthopedic, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Dan Chen
- Department of Orthopedic, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Lanzheng Bian
- Department of Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
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Bone Regeneration Using N-Methyl-2-pyrrolidone as an Enhancer for Recombinant Human Bone Morphogenetic Protein-2 in a Rabbit Sinus Augmentation Model. BIOMED RESEARCH INTERNATIONAL 2017; 2017:4153073. [PMID: 28680881 PMCID: PMC5478818 DOI: 10.1155/2017/4153073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 04/06/2017] [Indexed: 11/17/2022]
Abstract
The aim of this study was to determine whether N-methyl-2-pyrrolidone (NMP) can decrease the dose of recombinant human bone morphogenetic protein-2 (rhBMP-2) in sinus augmentation of rabbits. In each of 15 rabbits, 2 sinuses were randomly grafted using 1 of 3 treatment modalities: (i) biphasic calcium phosphate (BCP; control), (ii) rhBMP-2-coated BCP (BMP), or (iii) rhBMP-2-coated BCP soaked in NMP solution (BMP/NMP). The rabbits were sacrificed 2 weeks postoperatively. Histologic and histomorphometric analyses were performed. Bone formation in all groups was predominantly located close to the access window and the lateral walls. Newly formed bone within the total augmented area (NBTA) was greatest in BMP/NMP (1.94 ± 0.69 mm2), followed by BMP (1.50 ± 0.72 mm2) and BCP (1.28 ± 0.52 mm2) (P > 0.05). In the center of the augmentation (NBROI_C) and the area close to the sinus membrane (NBROI_M), BMP/NMP produced the largest area of NB (NBROI_C: 0.10 ± 0.11 mm2; NBROI_M: 0.17 ± 0.08 mm2); the corresponding NB values for BCP were 0.05 ± 0.05 mm2 and 0.08 ± 0.09 mm2, respectively (P > 0.05 for all comparisons). The effect of NMP on bone regeneration was inconsistent between the specimens. Adding NMP as an adjunct to rhBMP-2-coated BCP produced inconsistent effects on bone regeneration, resulting in no significant benefit compared to controls.
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40
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Influence of sinomenine upon mesenchymal stem cells in osteoclastogenesis. Biomed Pharmacother 2017; 90:835-841. [DOI: 10.1016/j.biopha.2017.03.084] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/23/2017] [Accepted: 03/26/2017] [Indexed: 11/22/2022] Open
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Ghayor C, Gjoksi B, Dong J, Siegenthaler B, Caflisch A, Weber FE. N,N Dimethylacetamide a drug excipient that acts as bromodomain ligand for osteoporosis treatment. Sci Rep 2017; 7:42108. [PMID: 28176838 PMCID: PMC5296751 DOI: 10.1038/srep42108] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/06/2017] [Indexed: 12/30/2022] Open
Abstract
N,N-Dimethylacetamide (DMA) is a water-miscible solvent, FDA approved as excipient and therefore widely used as drug-delivery vehicle. As such, DMA should be devoid of any bioactivity. Here we report that DMA is epigenetically active since it binds bromodomains and inhibits osteoclastogenesis and inflammation. Moreover, DMA enhances bone regeneration in vivo. Therefore, our in vivo and in vitro data reveal DMA's potential as an anti-osteoporotic agent via the inhibition of osteoclast mediated bone resorption and enhanced bone regeneration. Our results highlight the potential therapeutic benefits of DMA and the need for reconsideration of previous reports where DMA was used as an 'inactive' drug-delivery vehicle.
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Affiliation(s)
- Chafik Ghayor
- Oral Biotechnology &Bioengineering, Center for Dental Medicine/MKG, University of Zürich, Switzerland
| | - Bebeka Gjoksi
- Oral Biotechnology &Bioengineering, Center for Dental Medicine/MKG, University of Zürich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland
| | - Jing Dong
- Department of Biochemistry, University of Zurich, Switzerland
| | - Barbara Siegenthaler
- Oral Biotechnology &Bioengineering, Center for Dental Medicine/MKG, University of Zürich, Switzerland.,CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland
| | - Amedeo Caflisch
- Department of Biochemistry, University of Zurich, Switzerland
| | - Franz E Weber
- Oral Biotechnology &Bioengineering, Center for Dental Medicine/MKG, University of Zürich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland.,CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland
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Guo Y, Wang Y, Liu Y, Wang H, Guo C, Zhang X, Bei C. Effect of the same mechanical loading on osteogenesis and osteoclastogenesis in vitro. Chin J Traumatol 2017; 18:150-6. [PMID: 26643241 DOI: 10.1016/j.cjtee.2014.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
PURPOSE To investigate the influence of the same mechanical loading on osteogenesis and osteoclastogenesis in vitro. METHODS Primary osteoblasts, bone marrow-derived mesenchymal stem cells (BMSCs, cultured in osteoinductive medium) and RAW264.7 cells cultured in osteoclast inductive medium were all subjected to a 1000 μstrain (μs) at 1 Hz cyclic mechanical stretch for 30 min (twice a day). RESULTS After mechanical stimulation, the alkaline phosphatase (ALP) activity, osteocalcin protein level of the osteoblasts and BMSCs were all enhanced, and the mRNA levels of ALP and collagen type I increased. Additionally, extracellular-deposited calcium of both osteoblasts and BMSCs increased. At the same time, the activity of secreted tartrate-resistant acid phosphatase, the number of tartrate-resistant acid phosphatase-positive multinucleated cells, matrix metalloproteinase-9 protein levels of RAW264.7 cells and the extracellular calcium solvency all decreased. CONCLUSION The results demonstrated that 1000 μs cyclic mechanical loading enhanced osteoblasts activity, promoted osteoblastic differentiation of BMSCs and restrained osteoclastogenesis of RAW264.7 cells in vitro.
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Affiliation(s)
- Yong Guo
- College of Biotechnology, Guilin Medical University, Guilin 541004, China
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Bhattacharya I, Ghayor C, Weber FE. The Use of Adipose Tissue-Derived Progenitors in Bone Tissue Engineering - a Review. Transfus Med Hemother 2016; 43:336-343. [PMID: 27781021 DOI: 10.1159/000447494] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 06/08/2016] [Indexed: 12/12/2022] Open
Abstract
2500 years ago, Hippocrates realized that bone can heal without scaring. The natural healing potential of bone is, however, restricted to small defects. Extended bone defects caused by trauma or during tumor resections still pose a huge problem in orthopedics and cranio-maxillofacial surgery. Bone tissue engineering strategies using stem cells, growth factors, and scaffolds could overcome the problems with the treatment of extended bone defects. In this review, we give a short overview on bone tissue engineering with emphasis on the use of adipose tissue-derived stem cells and small molecules.
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Affiliation(s)
- Indranil Bhattacharya
- Oral Biotechnology & Bioengineering, Cranio-Maxillofacial and Oral Surgery, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Chafik Ghayor
- Oral Biotechnology & Bioengineering, Cranio-Maxillofacial and Oral Surgery, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Franz E Weber
- Oral Biotechnology & Bioengineering, Cranio-Maxillofacial and Oral Surgery, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
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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: 54] [Impact Index Per Article: 6.8] [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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Gjoksi B, Ghayor C, Bhattacharya I, Zenobi-Wong M, Weber FE. The bromodomain inhibitor N-methyl pyrrolidone reduced fat accumulation in an ovariectomized rat model. Clin Epigenetics 2016; 8:42. [PMID: 27110299 PMCID: PMC4840488 DOI: 10.1186/s13148-016-0209-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 04/14/2016] [Indexed: 12/14/2022] Open
Abstract
Background Weight gain is one of the consequences of estrogen deficiency and constitutes a major health problem. The present study highlights the effects of N-methyl pyrrolidone (NMP) on adipogenesis in osteoporosis induced by estrogen deficiency in an ovariectomized rat model. Results Ovariectomy resulted in body weight gain, increased femoral marrow adipocytes, and hypertrophic adipocytes in white adipose tissue, distorted serum leptin, and TNF-α and PPARγ levels. Treatment with NMP normalized these parameters similar to the control group. In vitro, NMP inhibited the differentiation of 3T3-L1 pre-adipocytes and hMSCs, indicating its anti-adipogenic effect. Moreover, PPARγ was significantly reduced with NMP treatment in in vivo and in vitro experiments. NMP inhibited BRD2 and BRD4 binding in an AlphaScreen assay, with an IC50 of 3 and 4 mM, respectively. The effect of NMP was consistent with its role as a bromodomain inhibitor. Conclusions Our data indicates that NMP inhibits the adipogenic effect of estrogen deficiency at the level of PPARγ expression by BRD4 inhibition. Electronic supplementary material The online version of this article (doi:10.1186/s13148-016-0209-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bebeka Gjoksi
- Oral Biotechnology & Bioengineering, Center for Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland ; Cartilage Engineering + Regeneration Laboratory, ETH Zurich, Zurich, Switzerland
| | - Chafik Ghayor
- Oral Biotechnology & Bioengineering, Center for Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland
| | - Indranil Bhattacharya
- Oral Biotechnology & Bioengineering, Center for Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland ; Department of Internal Medicine, University Hospital of Zurich, Zurich, Switzerland
| | - Marcy Zenobi-Wong
- Cartilage Engineering + Regeneration Laboratory, ETH Zurich, Zurich, Switzerland ; CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland
| | - Franz E Weber
- Oral Biotechnology & Bioengineering, Center for Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland ; CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland ; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
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Gjoksi B, Ruangsawasdi N, Ghayor C, Siegenthaler B, Zenobi-Wong M, Weber FE. Influence of N-methyl pyrrolidone on the activity of the pulp-dentine complex and bone integrity during osteoporosis. Int Endod J 2016; 50:271-280. [PMID: 26913571 DOI: 10.1111/iej.12622] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 02/18/2016] [Indexed: 11/29/2022]
Abstract
AIM To analyse the effect of systemic application of N-methyl pyrrolidone (NMP) on the pulp-dentine complex and on the jawbone of ovariectomized rats. METHOD Female Sprague Dawley rats were randomly divided into a Sham-operated group (Sham n = 6) and an oestrogen depletion by ovariectomy (OVX n = 12) group. In 6 of the ovariectomized animals, N-methyl pyrrolidone (NMP) in phosphate-buffered saline (PBS) was administered systemically weekly by intraperitoneal injection (i.p.); the other 6 were injected with PBS (Veh). After 15 weeks of injections, the jaw bones were collected and pulps extracted from the incisors teeth. Histology was used to determine pre-dentine thickness in teeth and radiography to determine alveolar bone mass. Immunohistological staining and RT-PCR were performed to verify the presence and localization of the odontoblast-specific dentine sialoprotein and to quantify its expression in the dentine-pulp complex. Mandibular cortical width and mandibular height were evaluated by means of X-ray analysis. Statistical analysis was performed with analysis of variance (anova). RESULTS Both pre-dentine (P = 0.029) and alveolar bone structures (P = 0.049) were significantly reduced due to oestrogen deficiency in OVX Veh and OVX. NMP treatment normalized these parameters to the Sham level. DSPP expression in OVX NMP animals was significantly higher (P = 0.046) than in OVX Veh. X-ray analysis confirmed that ovariectomy significantly reduced the mandibular cortical width in the OVX Veh group compared to the Sham Veh and OVX NMP (P = 0.020). CONCLUSION N-methyl pyrrolidone (NMP) had a remarkable anti-osteoporotic ability preserving activity in the pulp-dentine complex and preventing jawbone loss. These effects make NMP a promising candidate for the preservation of the activity of the pulp-dentine complex and jawbone thickness in post-menopausal females.
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Affiliation(s)
- B Gjoksi
- Oral Biotechnology & Bioengineering, Center of Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland.,Cartilage engineering + Regeneration Laboratory, ETH Zurich, Zurich, Switzerland
| | - N Ruangsawasdi
- Oral Biotechnology & Bioengineering, Center of Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.,Department Pharmacology, Faculty of Dentistry, Mahidol University, Thailand
| | - C Ghayor
- Oral Biotechnology & Bioengineering, Center of Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland
| | - B Siegenthaler
- Oral Biotechnology & Bioengineering, Center of Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - M Zenobi-Wong
- Cartilage engineering + Regeneration Laboratory, ETH Zurich, Zurich, Switzerland.,CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland
| | - F E Weber
- Oral Biotechnology & Bioengineering, Center of Dental Medicine, Cranio-Maxillofacial and Oral Surgery, University of Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.,CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland
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CHOI BOYUN, PARK CHULHONG, NA YUNHEE, BAI HYOUNGWOO, CHO JAEYOUNG, CHUNG BYUNGYEOUP. Inhibition of RANKL-induced osteoclast differentiation through the downregulation of c-Fos and NFATc1 by Eremochloa ophiuroides (centipedegrass) extract. Mol Med Rep 2016; 13:4014-22. [DOI: 10.3892/mmr.2016.5015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 12/31/2015] [Indexed: 11/06/2022] Open
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48
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Bizenjima T, Takeuchi T, Seshima F, Saito A. Effect of poly (lactide-co-glycolide) (PLGA)-coated beta-tricalcium phosphate on the healing of rat calvarial bone defects: a comparative study with pure-phase beta-tricalcium phosphate. Clin Oral Implants Res 2016; 27:1360-1367. [PMID: 26748831 DOI: 10.1111/clr.12744] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2015] [Indexed: 01/22/2023]
Abstract
OBJECTIVES To investigate the effect of poly (lactide-co-glycolide) (PLGA)-coated β-tricalcium phosphate (TCP) as a scaffold on bone regeneration in rat calvaria. MATERIAL AND METHODS Bilateral critical-sized defects were created in the calvaria of 20 Sprague Dawley rats. Defects of each rat were filled with pure-phase β-TCP or PLGA/β-TCP, or left as unfilled control. The healing was evaluated by micro-computed tomography, histological, and immunohistochemical analyses. Tartrate-resistant acid phosphatase (TRAP) staining was also performed to assess the resorption activity. RESULTS At 4 weeks, ingrowth of cells from the surrounding tissue into the β-TCP and PLGA/β-TCP biomaterials were observed in the defect area, and new bone formation had started. At 6 weeks, the value for defect closure in the β-TCP group was significantly greater than that in the unfilled control (P < 0.01). A significantly greater level of new bone formation was found in the β-TCP group (P < 0.01) and PLGA/β-TCP group (P < 0.05) than that in the control group, while no significant difference was found between the β-TCP and PLGA/β-TCP groups. At both time points, the height of new tissue/biomaterial in the central third of the defect was significantly increased when the β-TCP or PLGA/β-TCP was used. Proliferating cell nuclear antigen -positive cells were observed around and inside the β-TCP or PLGA/β-TCP, and TRAP-positive cells were found at the surface of the biomaterials, suggesting that remodeling was occurring. CONCLUSION The application of PLGA-coated β-TCP could promote bone regeneration to similar extent as the β-TCP biomaterial in this in vivo model.
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Affiliation(s)
| | | | - Fumi Seshima
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
| | - Atsushi Saito
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan. .,Oral Health Science Center, Tokyo Dental College, Tokyo, Japan.
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Ihn HJ, Lee D, Lee T, Kim SH, Shin HI, Bae YC, Hong JM, Park EK. Inhibitory Effects of KP-A159, a Thiazolopyridine Derivative, on Osteoclast Differentiation, Function, and Inflammatory Bone Loss via Suppression of RANKL-Induced MAP Kinase Signaling Pathway. PLoS One 2015; 10:e0142201. [PMID: 26536233 PMCID: PMC4633183 DOI: 10.1371/journal.pone.0142201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 10/19/2015] [Indexed: 11/19/2022] Open
Abstract
Abnormally elevated formation and activation of osteoclasts are primary causes for a majority of skeletal diseases. In this study, we found that KP-A159, a newly synthesized thiazolopyridine derivative, inhibited osteoclast differentiation and function in vitro, and inflammatory bone loss in vivo. KP-A159 did not cause a cytotoxic response in bone marrow macrophages (BMMs), but significantly inhibited the formation of multinucleated tartrate-resistant acid phosphatase (TRAP)-positive osteoclasts induced by macrophage colony-stimulating factor (M-CSF) and receptor activator of nuclear factor-κB ligand (RANKL). KP-A159 also dramatically inhibited the expression of marker genes related to osteoclast differentiation, including TRAP (Acp5), cathepsin K (Ctsk), dendritic cell-specific transmembrane protein (Dcstamp), matrix metallopeptidase 9 (Mmp9), and nuclear factor of activated T-cells, cytoplasmic 1 (Nfatc1). Moreover, actin ring and resorption pit formation were inhibited by KP-A159. Analysis of the signaling pathway involved showed that KP-A159 inhibited RANKL-induced activation of extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and mitogen-activated protein kinase kinase1/2 (MEK1/2). In a mouse inflammatory bone loss model, KP-A159 significantly rescued lipopolysaccharide (LPS)-induced bone loss by suppressing osteoclast numbers. Therefore, KP-A159 targets osteoclasts, and may be a potential candidate compound for prevention and/or treatment of inflammatory bone loss.
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Affiliation(s)
- Hye Jung Ihn
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Doohyun Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Taeho Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Sang-Hyun Kim
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hong-In Shin
- Department of Oral Pathology and Regenerative Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Yong Chul Bae
- Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Jung Min Hong
- Skeletal Diseases Genome Research Centre, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Eui Kyun Park
- Department of Oral Pathology and Regenerative Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
- * E-mail:
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50
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Gjoksi B, Ghayor C, Siegenthaler B, Ruangsawasdi N, Zenobi-Wong M, Weber FE. The epigenetically active small chemical N-methyl pyrrolidone (NMP) prevents estrogen depletion induced osteoporosis. Bone 2015; 78:114-21. [PMID: 25959414 DOI: 10.1016/j.bone.2015.05.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/20/2015] [Accepted: 05/02/2015] [Indexed: 12/22/2022]
Abstract
Currently, there are several treatments for osteoporosis however; they all display some sort of limitation and/or side effects making the need for new treatments imperative. We have previously demonstrated that NMP is a bioactive drug which enhances bone regeneration in vivo and acts as an enhancer of bone morphogenetic protein (BMP) in vitro. NMP also inhibits osteoclast differentiation and attenuates bone resorption. In the present study, we tested NMP as a bromodomain inhibitor and for osteoporosis prevention on ovariectomized (OVX) induced rats while treated systemically with NMP. Female Sprague-Dawley rats were ovariectomized and weekly NMP treatment was administrated 1 week after surgery for 15 weeks. Bone parameters and related serum biomarkers were analyzed. 15 weeks of NMP treatment decreased ovariectomy-induced gained weight in average by 43% and improved bone mineral density (BMD) and bone volume over total volume (BV/TV) in rat femur on average by 25% and 41% respectively. Moreover, mineral apposition rate and bone biomarkers of bone turnover in the treatment group were at similar levels with those of the Sham group. Due to the function of NMP as a low affinity bromodomain inhibitor and its mechanism of action involving osteoblasts/osteoclasts balance and inhibitory effect on inflammatory cytokines, NMP is a promising therapeutic compound for the prevention of osteoporosis.
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Affiliation(s)
- Bebeka Gjoksi
- University Hospital, Division of Cranio-Maxillofacial and Oral Surgery and University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse 11, 8032 Zürich, Switzerland; Cartilage Engineering+Regeneration Laboratory, ETH Zurich, Zurich, Switzerland
| | - Chafik Ghayor
- University Hospital, Division of Cranio-Maxillofacial and Oral Surgery and University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse 11, 8032 Zürich, Switzerland
| | - Barbara Siegenthaler
- University Hospital, Division of Cranio-Maxillofacial and Oral Surgery and University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse 11, 8032 Zürich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland
| | - Nisarat Ruangsawasdi
- University Hospital, Division of Cranio-Maxillofacial and Oral Surgery and University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse 11, 8032 Zürich, Switzerland
| | - Marcy Zenobi-Wong
- Cartilage Engineering+Regeneration Laboratory, ETH Zurich, Zurich, Switzerland
| | - Franz E Weber
- University Hospital, Division of Cranio-Maxillofacial and Oral Surgery and University of Zurich, Center of Dental Medicine, Oral Biotechnology & Bioengineering, Plattenstrasse 11, 8032 Zürich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland; CABMM, Center for Applied Biotechnology and Molecular Medicine, University of Zurich, Zurich, Switzerland.
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