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Liu XF, Liao YT, Shao JH, He DD, Fan ZH, Xu YN, Li C, Zhang X. Angelicin improves osteoporosis in ovariectomized rats by reducing ROS production in osteoclasts through regulation of the KAT6A/Nrf2 signalling pathway. Chin Med 2024; 19:91. [PMID: 38956695 PMCID: PMC11218408 DOI: 10.1186/s13020-024-00961-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 06/16/2024] [Indexed: 07/04/2024] Open
Abstract
BACKGROUND Angelicin, which is found in Psoralea, can help prevent osteoporosis by stopping osteoclast formation, although the precise mechanism remains unclear. METHODS We evaluated the effect of angelicin on the oxidative stress level of osteoclasts using ovariectomized osteoporosis model rats and RAW264.7 cells. Changes in the bone mass of the femur were investigated using H&E staining and micro-CT. ROS content was investigated by DHE fluorescence labelling. Osteoclast-related genes and proteins were examined for expression using Western blotting, immunohistochemistry, tartrate-resistant acid phosphatase staining, and real-time quantitative PCR. The influence of angelicin on osteoclast development was also evaluated using the MTT assay, double luciferin assay, chromatin immunoprecipitation, immunoprecipitation and KAT6A siRNA transfection. RESULTS Rats treated with angelicin had considerably higher bone mineral density and fewer osteoclasts. Angelicin prevented RAW264.7 cells from differentiating into osteoclasts in vitro when stimulated by RANKL. Experiments revealed reduced ROS levels and significantly upregulated intracellular KAT6A, HO-1, and Nrf2 following angelicin treatment. The expression of genes unique to osteoclasts, such as MMP9 and NFATc1, was also downregulated. Finally, KAT6A siRNA transfection increased intracellular ROS levels while decreasing KAT6A, Nrf2, and HO-1 protein expression in osteoclasts. However, in the absence of KAT6A siRNA transfection, angelicin greatly counteracted this effect in osteoclasts. CONCLUSIONS Angelicin increased the expression of KAT6A. This enhanced KAT6A expression helps to activate the Nrf2/HO-1 antioxidant stress system and decrease ROS levels in osteoclasts, thus inhibiting oxidative stress levels and osteoclast formation.
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Affiliation(s)
- Xiao-Feng Liu
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yi-Tao Liao
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Jia-Hao Shao
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Dan-Dan He
- Department of Spine, Wuxi Affiliated Hospital of Nanjing University of Chinese Medicine, Wuxi, 214071, China
| | - Zhi-Hong Fan
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Ye-Nan Xu
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Chao Li
- Department of Spine, Wuxi Affiliated Hospital of Nanjing University of Chinese Medicine, Wuxi, 214071, China.
| | - Xian Zhang
- Department of Spine, Wuxi Affiliated Hospital of Nanjing University of Chinese Medicine, Wuxi, 214071, China.
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Zhang J, Zhang L, Yao G, Zhao H, Wu S. NRF2 is essential for iron-overload stimulated osteoclast differentiation through regulation of redox and iron homeostasis. Cell Biol Toxicol 2023; 39:3305-3321. [PMID: 37855941 DOI: 10.1007/s10565-023-09834-5] [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: 06/08/2023] [Accepted: 10/11/2023] [Indexed: 10/20/2023]
Abstract
Iron overload enhances osteoclastic bone resorption and induces osteoporosis. Excess iron is highly toxic. The modulation of redox and iron homeostasis is critical for osteoclast differentiation under iron-overload condition. Nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor that regulates the cellular defense against oxidative stress and iron overload through the expression of genes involved in anti-oxidative processes and iron metabolism. Our studies demonstrated that NRF2 activation was suppressed during osteoclast differentiation. Under iron-overload condition, NRF2 and its mediated antioxidant and iron metabolism genes were activated by reactive oxygen species (ROS), which enhanced antioxidant capability. NRF2 mediated the upregulation of iron exporter ferroportin 1 (FPN1) and iron storage protein ferritin, contributing to decreased levels of intracellular iron. Nfe2l2 knockout induced oxidative stress and promoted osteoclast differentiation under normal condition, but induced ferroptosis under iron-overload condition. Nfe2l2 knockout alleviated iron overload induced bone loss by inhibiting osteoclast differentiation. Our results suggest that NRF2 activation is essential for osteoclast differentiation by enhancing antioxidant capability and reducing intracellular iron under iron-overload condition. Targeting NRF2 to induce ferroptosis could be a potential therapy for the treatment of iron-overload induced osteoporosis.
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Affiliation(s)
- Jian Zhang
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, 550025, Guizhou, China.
| | - Lingyan Zhang
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, 550025, Guizhou, China
| | - Gang Yao
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, 550025, Guizhou, China
| | - Hai Zhao
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, 550025, Guizhou, China
| | - Shuguang Wu
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, 550025, Guizhou, China
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Li J, Wei G, Liu G, Du Y, Zhang R, Wang A, Liu B, Cui W, Jia P, Xu Y. Regulating Type H Vessel Formation and Bone Metabolism via Bone-Targeting Oral Micro/Nano-Hydrogel Microspheres to Prevent Bone Loss. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207381. [PMID: 36967561 DOI: 10.1002/advs.202207381] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/28/2023] [Indexed: 05/27/2023]
Abstract
Postmenopausal osteoporosis is one of the most prevalent skeletal disorders in women and is featured by the imbalance between intraosseous vascularization and bone metabolism. In this study, a pH-responsive shell-core structured micro/nano-hydrogel microspheres loaded with polyhedral oligomeric silsesquioxane (POSS) using gas microfluidics and ionic cross-linking technology are developed. This micro/nano-hydrogel microsphere system (PDAP@Alg/Cs) can achieve oral delivery, intragastric protection, intestinal slow/controlled release, active targeting to bone tissue, and thus negatively affecting intraosseous angiogenesis and osteoclastogenesis. According to biodistribution data, PDAP@Alg/Cs can successfully enhance drug intestinal absorption and bioavailability through intestine adhesion and bone targeting after oral administration. In vitro and in vivo experiments reveal that PDAP@Alg/Cs promoted type H vessel formation and inhibited bone resorption, effectively mitigating bone loss by activating HIF-1α/VEGF signaling pathway and promoting heme oxygenase-1 (HO-1) expression. In conclusion, this novel oral micro/nano-hydrogel microsphere system can simultaneously accelerate intraosseous vascularization and decrease bone resorption, offering a brand-new approach to prevent postmenopausal osteoporosis.
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Affiliation(s)
- Junjie Li
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
- Department of Orthopaedics, Land Force No.72 Group Army Hospital of PLA, No.9 Chezhan Road, Huzhou, 313000, P. R. China
| | - Gang Wei
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Gongwen Liu
- Department of Orthopaedics, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, No.18 Yangsu Road, Suzhou, 215000, P. R. China
| | - Yawei Du
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Ruizhi Zhang
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
| | - Aifei Wang
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
| | - Baoshan Liu
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Peng Jia
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
| | - Youjia Xu
- Department of Orthopaedics, Second Affiliated Hospital of Soochow University, Osteoporosis Research Institute of Soochow University, No.1055 Sanxiang Road, Suzhou, 215000, P. R. China
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4
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Xu Y, Song D, Su Y, Chen J, Wu L, Lian H, Hai N, Li J, Jiang J, Zhao J, Xu J, Liu Q. Pharmacology-based molecular docking of 4-methylcatechol and its role in RANKL-mediated ROS/Keap1/Nrf2 signalling axis and osteoclastogenesis. Biomed Pharmacother 2023; 159:114101. [PMID: 36640671 DOI: 10.1016/j.biopha.2022.114101] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 01/14/2023] Open
Abstract
4-Methylcatechol (4-MC) is an agonist of various neurotrophic factors, which can upregulate the expression of Heme oxygenase 1 (HO-1) protein by activating nuclear factor erythroid 2-related factor 2 (Nrf2), thereby inhibiting oxidative stress-induced neural stem cell death. During RANKL-stimulated osteoclast differentiation, intracellular reactive oxygen species (ROS) levels were increased. Nonetheless, the effect of 4-MC on osteoclast formation and bone resorption function has not been researched. In this study, we investigated the effect of HO-1 upregulation by 4-MC on RANKL-induced osteoclastogenesis and explored the molecular mechanism of HO-1 upregulation by 4-MC. We found that the small molecule compound 4-MC could bind to Keap1 amino acid residue of glycine GLY 367, isoleucine ILE 559 and valine VAL 606, with a predicted binding energy of -4.99 kcal/mol. 4-MC was found to inhibit osteoclast differentiation in vitro by activating Nrf2 to scavenge ROS, inhibiting NF-κB phosphorylation, and alleviating osteoporosis in ovariectomized (OVX) mice. Taken together, 4-MC reduces ROS by inhibiting Keap1, thereby preventing OVX-induced bone loss.
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Affiliation(s)
- Yang Xu
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Dezhi Song
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China; Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Yuangang Su
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Junchun Chen
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Liwei Wu
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Haoyu Lian
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Na Hai
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Jing Li
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Jie Jiang
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Jinmin Zhao
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Jiake Xu
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; School of Biomedical Sciences, the University of Western Australia, Perth 6009, Australia.
| | - Qian Liu
- Research Centre for Regenerative Medicine, Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China; Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application, Guangxi Medical University, Nanning, Guangxi 530021, China.
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Molecular Hydrogen Prevents Osteoclast Activation in a Glucocorticoid-Induced Osteoporosis Zebrafish Scale Model. Antioxidants (Basel) 2023; 12:antiox12020345. [PMID: 36829904 PMCID: PMC9952250 DOI: 10.3390/antiox12020345] [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: 12/29/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Antioxidants represent a powerful tool for many human diseases and, in particular, molecular hydrogen has unique characteristics that make it a very promising therapeutic agent against osteoporosis. Zebrafish scales offer an innovative model in which new therapeutic approaches against secondary osteoporosis are tested. Scale bone loss obtained by prednisolone (PN) treatment is characterized by increased osteoclast activity and decreased osteoblast activity highlighted with bone enzymatic assays. We used this read-out system to test the therapeutic effects of hydrogen-rich water (HRW), an innovative antioxidant approach. HRW prevented osteoclast activation and bone loss in PN-treated fish scales, as verified by both biochemical and histochemical tartrate-resistant alkaline phosphatase assays. On the other hand, HRW treatment did not prevent PN-dependent osteoblast suppression, as measured by alkaline phosphatase activity. Moreover, HRW treatment did not facilitate the reparation of resorption lacunae induced in scales by PN. Our study highlighted a specific effect of HRW on adult osteoclast activity but not in osteoblasts, introducing an intriguing new antioxidant preventive approach against osteoporosis.
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6
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Qiu H, Hosking C, Rothzerg E, Samantha A, Chen K, Kuek V, Jin H, Zhu S, Vrielink A, Lim K, Foley M, Xu J. ADR3, a next generation i-body to human RANKL, inhibits osteoclast formation and bone resorption. J Biol Chem 2023; 299:102889. [PMID: 36634847 PMCID: PMC9929471 DOI: 10.1016/j.jbc.2023.102889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
Osteoporosis is a chronic skeletal condition characterized by low bone mass and deteriorated microarchitecture of bone tissue and puts tens of millions of people at high risk of fractures. New therapeutic agents like i-bodies, a class of next-generation single-domain antibodies, are needed to overcome some limitations of conventional treatments. An i-body is a human immunoglobulin scaffold with two long binding loops that mimic the shape and position of those found in shark antibodies, the variable new antigen receptors of sharks. Its small size (∼12 kDa) and long binding loops provide access to drug targets, which are considered undruggable by traditional monoclonal antibodies. Here, we have successfully identified a human receptor activator of nuclear factor-κB ligand (RANKL) i-body, ADR3, which demonstrates a high binding affinity to human RANKL (hRANKL) with no adverse effect on the survival or proliferation of bone marrow-derived macrophages. Differential scanning fluorimetry suggested that ADR3 is stable and able to tolerate a wide range of physical environments (including both temperature and pH). In addition, in vitro studies showed a dose-dependent inhibitory effect of ADR3 on osteoclast differentiation, podosome belt formation, and bone resorption activity. Further investigation on the mechanism of action of ADR3 revealed that it can inhibit hRANKL-mediated signaling pathways, supporting the in vitro functional observations. These clues collectively indicate that hRANKL antagonist ADR3 attenuates osteoclast differentiation and bone resorption, with the potential to serve as a novel therapeutic to protect against bone loss.
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Affiliation(s)
- Heng Qiu
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Christopher Hosking
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia,AdAlta Pty. Ltd, Bundoora, Victoria, Australia
| | - Emel Rothzerg
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Ariela Samantha
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Kai Chen
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Vincent Kuek
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia,Telethon Kids Cancer Centre, Telethon Kids Institute, Perth, Western Australia, Australia
| | - Haiming Jin
- Department of Orthopaedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Sipin Zhu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Alice Vrielink
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Kevin Lim
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia,AdAlta Pty. Ltd, Bundoora, Victoria, Australia
| | - Michael Foley
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia,AdAlta Pty. Ltd, Bundoora, Victoria, Australia
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia.
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7
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Kruppel-like Factors in Skeletal Physiology and Pathologies. Int J Mol Sci 2022; 23:ijms232315174. [PMID: 36499521 PMCID: PMC9741390 DOI: 10.3390/ijms232315174] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 12/11/2022] Open
Abstract
Kruppel-like factors (KLFs) belong to a large group of zinc finger-containing transcription factors with amino acid sequences resembling the Drosophila gap gene Krüppel. Since the first report of molecular cloning of the KLF family gene, the number of KLFs has increased rapidly. Currently, 17 murine and human KLFs are known to play crucial roles in the regulation of transcription, cell proliferation, cellular differentiation, stem cell maintenance, and tissue and organ pathogenesis. Recent evidence has shown that many KLF family molecules affect skeletal cells and regulate their differentiation and function. This review summarizes the current understanding of the unique roles of each KLF in skeletal cells during normal development and skeletal pathologies.
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8
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Li G, Park JN, Park HJ, Suh JH, Choi HS. High Cholesterol-Induced Bone Loss Is Attenuated by Arctiin via an Action in Osteoclasts. Nutrients 2022; 14:4483. [PMID: 36364745 PMCID: PMC9657919 DOI: 10.3390/nu14214483] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 10/29/2023] Open
Abstract
High cholesterol-induced bone loss is highly associated with oxidative stress, which leads to the generation of oxysterols, such as 7-ketocholesterol (7-KC). Here, we conducted in vivo and in vitro experiments to determine whether arctiin prevents high cholesterol diet-induced bone loss by decreasing oxidative stress. First, arctiin was orally administered to atherogenic diet (AD)-fed C57BL/6J male mice at a dose of 10 mg/kg for 6 weeks. Micro-computerized tomography (μCT) analysis showed that arctiin attenuated AD-induced boss loss. For our in vitro experiments, the anti-oxidant effects of arctiin were evaluated in 7-KC-stimulated osteoclasts (OCs). Arctiin decreased the number and activity of OCs and inhibited autophagy by disrupting the nuclear localization of transcription factor EB (TFEB) and downregulating the oxidized TFEB signaling pathway in OCs upon 7-KC stimulation. Furthermore, arctiin decreased the levels of reactive oxygen species (ROS) by enhancing the expression of nuclear factor erythroid 2-related factor 2 (Nrf2), catalase, and heme oxygenase 1 (HO-1), all of which affected OC differentiation. Conversely, silencing of Nrf2 or HO-1/catalase attenuated the effects of arctiin on OCs. Collectively, our findings suggested that arctiin attenuates 7-KC-induced osteoclastogenesis by increasing the expression of ROS scavenging genes in the Nrf2/HO-1/catalase signaling pathway, thereby decreasing OC autophagy. Moreover, arctiin inhibits the oxidation and nuclear localization of TFEB, thus protecting mice from AD-induced bone loss. Our findings thus demonstrate the therapeutic potential of arctiin for the prevention of cholesterol-induced bone loss.
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Affiliation(s)
- Guoen Li
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea
| | - Jung-Nam Park
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea
| | - Hyun-Jung Park
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea
| | - Jae-Hee Suh
- Department of Pathology, Ulsan University Hospital, Ulsan 44030, Korea
| | - Hye-Seon Choi
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea
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Doxorubicin Induces Bone Loss by Increasing Autophagy through a Mitochondrial ROS/TRPML1/TFEB Axis in Osteoclasts. Antioxidants (Basel) 2022; 11:antiox11081476. [PMID: 36009195 PMCID: PMC9404930 DOI: 10.3390/antiox11081476] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/20/2022] [Accepted: 07/25/2022] [Indexed: 12/10/2022] Open
Abstract
Doxorubicin (DOX), a widely used chemotherapeutic agent, has been linked to an increased risk of bone damage in human patients and induces bone loss in mice. DOX induces autophagy, which contributes to bone homeostasis and excess autophagy in osteoclasts (OCs), resulting in bone loss. We hypothesized that DOX-induced bone loss is caused by the induction of autophagy in OCs. In vitro, DOX significantly increased the area of OCs and bone resorption activity, whereas it decreased OC number through apoptosis. DOX enhanced the level of LC3II and acidic vesicular organelles-containing cells in OCs, whereas an autophagy inhibitor, 3-methyladenine (3-MA), reversed these, indicating that enhanced autophagy was responsible for the effects of DOX. Increased mitochondrial reactive oxygen species (mROS) by DOX oxidized transient receptor potential mucolipin 1 (TRPML1) on the lysosomal membrane, which led to nuclear localization of transcription factor EB (TFEB), an autophagy-inducing transcription factor. In vivo, micro-computerized tomography analysis revealed that the injection of 3-MA reversed DOX-induced bone loss, and tartrate-resistant acid phosphatase staining showed that 3-MA reduced the area of OCs on the bone surface, which was enhanced upon DOX administration. Collectively, DOX-induced bone loss is at least partly attributable to autophagy upregulation in OCs via an mROS/TRPML1/TFEB axis.
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10
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Lin YY, Takemoto JY, Chang CWT, Peng CA. Mesobiliverdin IXα ameliorates osteoporosis via promoting osteogenic differentiation of mesenchymal stem cells. Biochem Biophys Res Commun 2022; 619:56-61. [PMID: 35738065 DOI: 10.1016/j.bbrc.2022.06.042] [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: 05/24/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/16/2022]
Abstract
Heme oxygenase-1 (HO-1) expression promotes osteogenesis, but the mechanisms remain unclear and therapeutic strategies using it to target bone disorders such as osteoporosis have not progressed. Mesobiliverdin IXα is a naturally occurring bilin analog of HO-1 catalytic product biliverdin IXα. Inclusion of mesobiliverdin IXα in the feed diet of ovariectomized osteoporotic mice was observed to increase femur bone volume, trabecular thickness and osteogenesis serum markers osteoprotegrin and osteocalcin and to decrease bone resorption serum markers cross-linked N-teleopeptide and tartrate-resistant acid phosphatase 5b. Moreover, in vitro exposure of human bone marrow mesenchymal stem cells to mesobiliverdin IXα enhanced osteogenic differentiation efficiency by two-fold over non-exposed controls. Our results imply that mesobiliverdin IXα promotes osteogenesis in ways that reflect the potential therapeutic effects of induced HO-1 expression in alleviating osteoporosis.
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Affiliation(s)
- Yuan-Yu Lin
- Department of Animal Science and Technology, National Taiwan University, Taipei City, Taiwan
| | - Jon Y Takemoto
- Department of Biology, Utah State University, Logan, UT, United States
| | - Cheng-Wei T Chang
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United States
| | - Ching-An Peng
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, ID, United States.
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11
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Chen C, Hu F, Miao S, Sun L, Jiao Y, Xu M, Huang X, Yang Y, Zhou R. Transcription Factor KLF7 Promotes Osteoclast Differentiation by Suppressing HO-1. Front Genet 2022; 13:798433. [PMID: 35419025 PMCID: PMC8995880 DOI: 10.3389/fgene.2022.798433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/03/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Osteoporosis is a common orthopedic disease with high prevalence in patients older than 50 years. Osteoporosis is often detected only after the fracture and is hard to treat. Therefore, it is of great significance to explore the molecular mechanism of the occurrence of osteoporosis. Methods: The expression of Heme oxygenase-1 (HO-1) in people with different bone mineral density (BMD) was analyzed based on public databases. GenHacncer and JASPAR databases were adopted to search and verify the upstream transcription factor of HO-1. qRT-PCR, western blot and tartrate-resistant acid phosphatase assays were performed to explore the impact of HO-1 and Kruppel-like factor 7 (KLF7) on osteoclast differentiation. Chromatin immunoprecipitation (ChIP) assay confirmed the binding relationship between KLF7 and HO-1. Finally, Hemin, the agonist of HO-1, was applied in rescue assays, thereby verifying the mechanism of KLF7 modulating osteoclast differentiation by HO-1. Results: Bioinformatics analysis revealed that HO-1 was highly-expressed while KLF7 lowly-expressed in people with high BMD. Besides, a potential binding site of KLF7 was found on the promoter region of HO-1. ChIP assay further manifested the targeting relationship between HO-1 and KLF7. Western blot and TRAP staining unveiled that osteoclast differentiation was suppressed by HO-1, while facilitated by KLF7. Rescue experiments indicated that over-expressed HO-1 could reverse of the promoting effect of KLF7 on osteoclast differentiation. Conclusion: The study confirmed that osteoclast differentiation was promoted by KLF7 constraining HO-1, thereby facilitating osteoporosis. The cognation of the pathogenesis of osteoporosis was further enriched. New treatment could be developed on this basis.
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Affiliation(s)
- Changhong Chen
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Fei Hu
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Shichang Miao
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Liping Sun
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Yajun Jiao
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Mingwei Xu
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Xin Huang
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Ying Yang
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
| | - Rongkui Zhou
- Department of Orthopedics and Injury, Jiangyin Hospital Affiliated to Nanjing University of Chinese Medicine, Jiangyin, China
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12
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Li G, Sul OJ, Yu R, Choi HS. 7-Ketocholesterol-Induced Micro-RNA-107-5p Increases Number and Activity of Osteoclasts by Targeting MKP1. Int J Mol Sci 2022; 23:ijms23073697. [PMID: 35409056 PMCID: PMC8998300 DOI: 10.3390/ijms23073697] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 12/18/2022] Open
Abstract
Osteoclasts (OCs), which are responsible for bone resorption, play a critical role in cholesterol-induced bone loss and recent studies have suggested that various micro-RNAs (miRs) contribute to modulating OCs. We hypothesized that 7-ketocholesterol (7-KC), a metabolite responsible for cholesterol-induced bone loss, induces miR-107-5p, which affects OCs. Overexpression and knock-down of miR-107-5p were performed using miR-107-5p mimic and anti-miR-107-5p, respectively. The effects of miR-107-5p on OCs were analyzed by tartrate-resistant alkaline phosphatase staining, qPCR, and Western blot. MiR-107-5p was upregulated after 7-KC exposure in receptor activator of nuclear factor kappa-Β ligand-stimulated OCs. Furthermore, miR-107-5p upregulation was also observed in tibiae from an atherogenic diet-fed mice compared with mice fed with a normal diet. MiR-107-5p overexpression enhanced the area and number of OCs, whereas inhibiting the endogenous expression of miR-107-5p generated by 7-KC had the opposite effect. Among the possible candidates, mitogen-activated protein kinase phosphatase-1, a stress-responsive dual-specificity phosphatase that inactivates mitogen-activated protein kinase (MKP1), has been proven to be a target gene of miR-107-5p, as demonstrated by the direct interaction between miR-107-5p and the 3'-untranslated region of MKP1. Collectively, our findings demonstrate that 7-KC-induced miR-107-5p promotes differentiation and function of OCs by downregulating MKP1.
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Affiliation(s)
- Guoen Li
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea; (G.L.); (O.-J.S.)
| | - Ok-Joo Sul
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea; (G.L.); (O.-J.S.)
| | - Rina Yu
- Department of Food and Nutrition, University of Ulsan, Ulsan 44610, Korea;
| | - Hye-Seon Choi
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 44610, Korea; (G.L.); (O.-J.S.)
- Correspondence: ; Tel.: +82-52-259-1545; Fax: +82-52-259-2740
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13
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Zhou X, Yuan W, Xiong X, Zhang Z, Liu J, Zheng Y, Wang J, Liu J. HO-1 in Bone Biology: Potential Therapeutic Strategies for Osteoporosis. Front Cell Dev Biol 2021; 9:791585. [PMID: 34917622 PMCID: PMC8669958 DOI: 10.3389/fcell.2021.791585] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 11/12/2021] [Indexed: 02/05/2023] Open
Abstract
Osteoporosis is a prevalent bone disorder characterized by bone mass reduction and deterioration of bone microarchitecture leading to bone fragility and fracture risk. In recent decades, knowledge regarding the etiological mechanisms emphasizes that inflammation, oxidative stress and senescence of bone cells contribute to the development of osteoporosis. Studies have demonstrated that heme oxygenase 1 (HO-1), an inducible enzyme catalyzing heme degradation, exhibits anti-inflammatory, anti-oxidative stress and anti-apoptosis properties. Emerging evidence has revealed that HO-1 is critical in the maintenance of bone homeostasis, making HO-1 a potential target for osteoporosis treatment. In this Review, we aim to provide an introduction to current knowledge of HO-1 biology and its regulation, focusing specifically on its roles in bone homeostasis and osteoporosis. We also examine the potential of HO-1-based pharmacological therapeutics for osteoporosis and issues faced during clinical translation.
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Affiliation(s)
- Xueman Zhou
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Wenxiu Yuan
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Xin Xiong
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhenzhen Zhang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Jiaqi Liu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Yingcheng Zheng
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Jun Wang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jin Liu
- Lab for Aging Research, State Key Laboratory of Biotherapy and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
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14
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Wang G, Chen K, Ma C, Wang C, Chen D, He J, Liu Y, Jiang T, Yuan J, Chen L, He W, Xu J. Roburic acid attenuates osteoclastogenesis and bone resorption by targeting RANKL-induced intracellular signaling pathways. J Cell Physiol 2021; 237:1790-1803. [PMID: 34796915 DOI: 10.1002/jcp.30642] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/28/2021] [Accepted: 11/09/2021] [Indexed: 11/07/2022]
Abstract
Excessive activity of osteoclasts contributes to skeletal diseases such as osteoporosis and osteolysis. However, current drugs targeting osteoclast have various deficiencies, placing natural compounds as substitutions of great potential. Roburic acid (RA) is a triterpenoid exacted from Radix Gentianae Macrophyllae, which exhibits inhibitory effects on inflammation and oxidation. By employing an in vitro osteoclastogenesis model, this study investigates the effects and mechanisms of RA on intracellular signaling induced by receptor activator of nuclear factor-κB ligand (RANKL). As expected, RA at a concentration scope from 1 to 10 μM dampened the osteoclast differentiation of bone marrow macrophages (BMMs) but without cell toxicity. Interestingly, RA showed no effect on osteoblastogenesis in vitro. Furthermore, RA mitigated F-actin ring formation, hydroxyapatite resorption, and gene expression in osteoclasts. Mechanistically, RA suppressed TNF receptor-associated factor 6 (TRAF6), the crucial adaptor protein following RANKL-RANK binding. On the one hand, RA downregulated the nuclear factor-κB (NF-κB) activity, extracellular regulated protein kinases (ERK) phosphorylation, and calcium oscillations. On the other hand, RA upregulated the antioxidative response element (ARE) response and the protein expression of heme oxygenase (HO)-1. These upstream alterations eventually led to the suppression of the nuclear factor of activated T cells 1 (NFATc1) activity and the expression of proteins involved in osteoclastogenesis and bone resorption. Furthermore, by using an ovariectomized (OVX) mice model, RA was found to have therapeutic effects against bone loss. On account of these findings, RA could be used to restrain osteoclasts for treating osteoporosis and other osteolytic diseases.
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Affiliation(s)
- Gang Wang
- Department of Orthopaedics, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia.,Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Kai Chen
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Chao Ma
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chao Wang
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Delong Chen
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia.,Department of Orthopaedics, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Jianbo He
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia.,Department of Orthopaedics, Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuhao Liu
- Department of Orthopaedics, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Tao Jiang
- Department of Orthopaedics, Guangdong Second Traditional Chinese Medicine Hospital, Guangzhou, China
| | - Jinbo Yuan
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Leilei Chen
- Department of Orthopaedics, Third Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wei He
- Department of Orthopaedics, Third Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
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15
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Sul OJ, Li G, Kim JE, Kim ES, Choi HS. 7-ketocholesterol enhances autophagy via the ROS-TFEB signaling pathway in osteoclasts. J Nutr Biochem 2021; 96:108783. [PMID: 34023424 DOI: 10.1016/j.jnutbio.2021.108783] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 04/20/2021] [Accepted: 04/29/2021] [Indexed: 11/30/2022]
Abstract
Oxysterols play a critical role in human health and diseases associated with high cholesterol and oxidative stress. Given that a positive correlation was observed between cholesterol and collagen type 1 fragment (CTX-1) or serum reactive oxygen species (ROS) in humans, we hypothesized that oxidized cholesterol metabolites may participate in cholesterol-induced bone loss. Therefore, this study aimed to identify the metabolite responsible for cholesterol-associated bone loss and evaluate its effect on osteoclasts (OCs) leading to bone loss. An atherogenic diet in mice increased the levels of the oxysterol, 7-ketocholesterol (7-KC) in bone, as well as serum ROS. 7-KC increased the number and activity of OCs by enhancing autophagy via the ROS-transcription factor EB signaling pathway. These findings suggest that 7-KC acts as a cholesterol metabolite and is at least partially responsible for cholesterol-induced bone loss by inducing autophagy in OCs.
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Affiliation(s)
- Ok-Joo Sul
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan, Korea
| | - Guoen Li
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan, Korea
| | - Ji-Eun Kim
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan, Korea
| | - Eun-Sook Kim
- Department of Endocrinology, Ulsan University Hospital, Ulsan, Korea
| | - Hye-Seon Choi
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan, Korea.
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16
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Che J, Yang J, Zhao B, Shang P. HO-1: A new potential therapeutic target to combat osteoporosis. Eur J Pharmacol 2021; 906:174219. [PMID: 34081904 DOI: 10.1016/j.ejphar.2021.174219] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/24/2021] [Accepted: 05/28/2021] [Indexed: 02/07/2023]
Abstract
Heme oxygenase-1 (HO-1) exerts a protective effect against cell damage and induces the activity of many enzymes involved in the treatment of many human diseases, including osteoporosis. The increasing prevalence of osteoporosis and the limitations of the current treatments available led to a continuous occurrence of bone loss and osteoporotic fractures, highlighting the need of a better understanding of the mechanism and function of HO-1. Many factors cause osteoporosis, including lack of estrogen, aging, and iron overload, and they either cause the increase in inflammatory factors or the increase in reactive oxygen species to break bone reconstruction balance. Therefore, regulating the production of inflammatory factors and reactive oxygen species may become a strategy for the treatment of osteoporosis. Solid evidence showed that the overexpression of HO-1 compensates high oxidation levels by increasing intracellular antioxidant levels and reduces inflammation by suppressing pro-inflammatory factors. Some extracts can target HO-1 and ameliorate osteoporosis. However, no systematic report is available on therapies targeting HO-1 to combat osteoporosis. Therefore, this review summarizes the biological characteristics of HO-1, and the relationship between inflammatory response and reactive oxygen species production regulated by HO-1 and osteoporosis. The understanding of the role of HO-1 in osteoporosis may provide ideas for a potential clinical treatment and new drugs targeting HO-1.
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Affiliation(s)
- Jingmin Che
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, Guangdong, 518057, China; School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
| | - Jiancheng Yang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Department of Spinal Surgery, People's Hospital of Longhua Shenzhen, Shenzhen, China.
| | - Bin Zhao
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, Guangdong, 518057, China; School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
| | - Peng Shang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, Guangdong, 518057, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
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17
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Sul OJ, Hyun HJ, Rajasekaran M, Suh JH, Choi HS. Estrogen enhances browning in adipose tissue by M2 macrophage polarization via heme oxygenase-1. J Cell Physiol 2021; 236:1875-1888. [PMID: 32716106 DOI: 10.1002/jcp.29971] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/14/2020] [Indexed: 12/19/2022]
Abstract
Loss of ovarian function results in increased fat mass, leading to the accumulation of adipose tissue macrophages that participate in chronic inflammation. We hypothesized that ovariectomy (OVX)-induced increases in body weight and fat mass are associated with decreased adipose tissue (AT) browning due to estrogen (E2 ) deficiency. In mice, OVX decreased AT browning along with increased body weight, fat mass, and size of lipid droplets 12 weeks after surgery. Exogenous E2 recovered the OVX-induced changes. AT browning was enhanced by M2 macrophages induced by exogenous E2. E2 -induced M2 polarization occurred due to the increased expression of heme oxygenase-1 (HO-1) in macrophages, leading to decreased reactive oxygen species levels. Collectively, we demonstrated that E2 enhances AT browning via M2 polarization mediated by HO-1.
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Affiliation(s)
- Ok-Joo Sul
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Hyo-Jung Hyun
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | | | - Jae-Hee Suh
- Department of Pathology, Ulsan University Hospital, Ulsan, Korea
| | - Hye-Seon Choi
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
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18
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Zhao Y, Jia L, Zheng Y, Li W. Involvement of Noncoding RNAs in the Differentiation of Osteoclasts. Stem Cells Int 2020; 2020:4813140. [PMID: 32908541 PMCID: PMC7468661 DOI: 10.1155/2020/4813140] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 12/13/2022] Open
Abstract
As the most important bone-resorbing cells, osteoclasts play fundamental roles in bone remodeling and skeletal health. Much effort has been focused on identifying the regulators of osteoclast metabolism. Noncoding RNAs (ncRNAs) reportedly regulate osteoclast formation, differentiation, survival, and bone-resorbing activity to participate in bone physiology and pathology. The present review intends to provide a general framework for how ncRNAs and their targets regulate osteoclast differentiation and the important events of osteoclastogenesis they are involved in, including osteoclast precursor generation, early differentiation, mononuclear osteoclast fusion, and multinucleated osteoclast function and survival. This framework is beneficial for understanding bone biology and for identifying the potential biomarkers or therapeutic targets of bone diseases. The review also summarizes the results of in vivo experiments and classic experiment methods for osteoclast-related researches.
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Affiliation(s)
- Yi Zhao
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Lingfei Jia
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Yunfei Zheng
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Weiran Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
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19
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Anselmino N, Starbuck M, Labanca E, Cotignola J, Navone N, Gueron G, Zenclussen AC, Vazquez E. Heme Oxygenase-1 Is a Pivotal Modulator of Bone Turnover and Remodeling: Molecular Implications for Prostate Cancer Bone Metastasis. Antioxid Redox Signal 2020; 32:1243-1258. [PMID: 31861963 PMCID: PMC7232646 DOI: 10.1089/ars.2019.7879] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 01/28/2023]
Abstract
Aims: Bone is the most frequent site of prostate cancer (PCa) metastasis. Tumor cells interact with the bone microenvironment interrupting tissue balance. Heme oxygenase-1 (HO-1; encoded by Hmox1) appears as a potential target in PCa maintaining the cellular homeostasis. Our hypothesis is that HO-1 is implicated in bone physiology and modulates the communication with PCa cells. Here we aimed at (i) assessing the physiological impact of Hmox1 gene knockout (KO) on bone metabolism in vivo and (ii) determining the alterations of the transcriptional landscape associated with tumorigenesis and bone remodeling in cells growing in coculture (PCa cells with primary mouse osteoblasts [PMOs] from BALB/c Hmox1+/+, Hmox1+/-, and Hmox1-/- mice). Results: Histomorphometric analysis of Hmox1-/- mice bones exhibited significantly decreased bone density with reduced remodeling parameters. A positive correlation between Hmox1 expression and Runx2, Col1a1, Csf1, and Opg genes was observed in PMOs. Flow cytometry studies revealed two populations of PMOs with different reactive oxygen species (ROS) levels. The high ROS population was increased in PMOs Hmox1+/- compared with Hmox1+/+, but was significantly reduced in PMOs Hmox1-/-, suggesting restrained ROS tolerance in KO cells. Gene expression was altered in PMOs upon coculture with PCa cells, showing a pro-osteoclastic profile. Moreover, HO-1 induction in PCa cells growing in coculture with PMOs resulted in a significant modulation of key bone markers such as PTHrP and OPG. Innovation and Conclusion: We here demonstrate the direct implications of HO-1 expression in bone remodeling and how it participates in the alterations in the communication between bone and prostate tumor cells.
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Affiliation(s)
- Nicolás Anselmino
- Laboratorio de inflamación y Cáncer, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), CONICET—Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Michael Starbuck
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Estefania Labanca
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Javier Cotignola
- Laboratorio de inflamación y Cáncer, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), CONICET—Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Nora Navone
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Geraldine Gueron
- Laboratorio de inflamación y Cáncer, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), CONICET—Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ana C. Zenclussen
- Experimental Obstetrics and Gynecology, Medical Faculty, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Elba Vazquez
- Laboratorio de inflamación y Cáncer, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), CONICET—Universidad de Buenos Aires, Buenos Aires, Argentina
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20
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The Roles of FoxO Transcription Factors in Regulation of Bone Cells Function. Int J Mol Sci 2020; 21:ijms21030692. [PMID: 31973091 PMCID: PMC7037875 DOI: 10.3390/ijms21030692] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/16/2020] [Accepted: 01/17/2020] [Indexed: 12/11/2022] Open
Abstract
Forkhead box class O family member proteins (FoxOs) are evolutionarily conserved transcription factors for their highly conserved DNA-binding domain. In mammalian species, all the four FoxO members, FoxO1, FoxO3, FoxO4, and FoxO6, are expressed in different organs. In bone, the first three members are extensively expressed and more studied. Bone development, remodeling, and homeostasis are all regulated by multiple cell lineages, including osteoprogenitor cells, chondrocytes, osteoblasts, osteocytes, osteoclast progenitors, osteoclasts, and the intercellular signaling among these bone cells. The disordered FoxOs function in these bone cells contribute to osteoarthritis, osteoporosis, or other bone diseases. Here, we review the current literature of FoxOs for their roles in bone cells, focusing on helping researchers to develop new therapeutic approaches and prevent or treat the related bone diseases.
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21
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Sul OJ, Kim JE, Ke K, Suh JH, Choi HS. Atherogenic diet-induced bone loss is primarily due to increased osteoclastogenesis in mice. J Nutr Biochem 2020; 79:108337. [PMID: 32018113 DOI: 10.1016/j.jnutbio.2019.108337] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 11/20/2019] [Accepted: 12/20/2019] [Indexed: 12/23/2022]
Abstract
Atherogenic diet (AD) decreased bone density and increased serum cholesterol level in male mice, implying that cholesterol participates in bone loss. The aim of the present study was to identify the cells responsible for bone loss and evaluate the involved mechanism. AD resulted in increased number and surface of osteoclasts (OCs) with in vivo tartrate-resistant acid phosphatase (TRAP) staining, suggesting a critical role of OCs in cholesterol-induced bone loss. In vitro, cholesterol loading by oxidized low-density lipoprotein (oxLDL) increased the size and number of OCs as well as bone resorption activity, suggesting that cholesterol loading affects the number and activity of OCs. In contrast, cholesterol depletion by simvastatin decreased osteoclastogenesis and bone resorption. oxLDL stimulated osteoblasts (OBs) to increase expression of receptor activator of nuclear factor kappa-Β ligand (RANKL), resulting in increased OC formation when OBs were co-cultured with bone marrow derived macrophages. oxLDL increased expression of CD36 and liver X receptors (LXRα) in OCs as well as low density lipoprotein receptor (LDLR) and LXRα in OBs. These results suggest that CD36 and LXRα mediate the effect of oxLDL in OCs, whereas LDLR and LXRα mediate the effect of oxLDL in OBs. These findings demonstrate cholesterol-induced bone loss with increasing number and activity of OCs in mice, suggesting another harmful effect of cholesterol, a major cause of atherosclerosis.
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Affiliation(s)
- Ok-Joo Sul
- Department of Biological Sciences, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Ji-Eun Kim
- Department of Biological Sciences, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Ke Ke
- Department of Biological Sciences, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Jae-Hee Suh
- Department of Pathology, Ulsan University Hospital, Ulsan 44030, Republic of Korea
| | - Hye-Seon Choi
- Department of Biological Sciences, University of Ulsan, Ulsan 44610, Republic of Korea.
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22
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He ZC, Li XY, Guo YL, Ma D, Fang Q, Ren LL, Zhang ZY, Wang W, Yu ZY, Zhao P, Wang JS. Heme oxygenase-1 attenuates the inhibitory effect of bortezomib against the APRIL-NF-κB-CCL3 signaling pathways in multiple myeloma cells: Corelated with bortezomib tolerance in multiple myeloma. J Cell Biochem 2019; 120:6972-6987. [PMID: 30368867 DOI: 10.1002/jcb.27879] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/21/2018] [Indexed: 01/24/2023]
Abstract
Osteoclasts (OCs) play an essential role in bone destruction in patients with multiple myeloma (MM). Bortezomib can ameliorate bone destruction in patients with MM, but advanced MM often resists bortezomib. We studied the molecular mechanisms of bortezomib tolerance in MM. The expression of the MM-related genes in newly diagnosed patients with MM and normal donors were studied. C-C motif chemokine ligand 3 (CCL3) is a cytokine involved in the differentiation of OCs, and its expression is closely related to APRIL (a proliferation-inducing ligand). We found that bortezomib treatment inhibited APRIL and CCL3. But the heme oxygenase-1 (HO-1) activator hemin attenuated the inhibitory effects of bortezomib on APRIL and CCL3. We induced mononuclear cells to differentiate into OCs, and the enzyme-linked immunosorbent assay showed that the more OCs differentiated, the higher the levels CCL3 secretions detected. Animal experiments showed that hemin promoted MM cell infiltration in mice. The weight and survival rate of tumor mice were associated with HO-1 expression. Immunohistochemical staining showed that HO-1, APRIL, and CCL3 staining were positively stained in the tumor infiltrating sites. Then, MM cells were transfected with L-HO-1/si-HO-1 expression vectors and cultured with an nuclear factor (NF)-kappa B (κB) pathway inhibitor, QNZ. The results showed that HO-1 was the upstream gene of APRIL, NF-κB, and CCL3. We showed that HO-1 could attenuate the inhibitory effect of bortezomib against the APRIL-NF-κB-CCL3 signaling pathways in MM cells, and the tolerance of MM cells to bortezomib and the promotion of bone destruction are related to HO-1.
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Affiliation(s)
- Zheng C He
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Xin Y Li
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Yong L Guo
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Dan Ma
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Qin Fang
- Department of Pharmacy, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Ling L Ren
- Department of Hematology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Zhao Y Zhang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Weili Wang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Zheng Y Yu
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Peng Zhao
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Ji S Wang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
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23
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Ko PH, Huang CW, Chang HH, Chuang EY, Tsai MH, Lai LC. Identifying the functions and biomarkers of Codonopsis pilosula and Astragalus membranaceus aqueous extracts in hepatic cells. Chin Med 2019; 14:10. [PMID: 30936938 PMCID: PMC6425643 DOI: 10.1186/s13020-019-0233-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/15/2019] [Indexed: 12/20/2022] Open
Abstract
Background Homeostasis is a crucial concept used to describe the condition of patients and the roles of herbs in traditional Chinese medicine. Qi-deficiency pattern is one of the conditions when loss of homeostasis and is usually characterized by symptoms including lassitude, spontaneous sweating, and a weak pulse, which are not easy to quantitate. Codonopsis pilosula and Astragalus membranaceus were usually prescribed for carriers with hepatitis and patients with metastatic colon cancer, because these patients tended to experience fatigue. However, crude drugs were prescribed based on the exterior symptoms of patients without controlling clinical setting, such as gender, age, and dietary habits. Limited molecular evidence of using gene expression as the guide for description is available. Therefore, the purpose of this study was to identify potential and objective biomarkers of these two qi-related drugs in a simplified cellular system. Methods Aqueous extracts of crude qi-tonifying herbs, C. pilosula and A. membranaceus, and that of a qi-consuming drug, Citrus reticulata, were prepared. Human liver cancer HepG2 cells were treated with the extracts of qi-tonifying herbs for 24 h. Differentially expressed genes were identified using microarrays and quantitative RT-PCR (qRT-PCR) and validated in two other hepatocellular cell lines, Huh7 and L-02. Results A total of 67 differentially expressed probes that responded to both herbs were identified. A pathway analysis revealed that these genes were involved in the development, growth, movement, and viability of the liver cells. Conclusions After qRT-PCR validation and examination of clinical data from public domains, our results showed that two genes, GDF15 and HMOX1, could serve as biomarkers in liver cells for identifying responses after treatment with C. pilosula and A. membranaceus.
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Affiliation(s)
- Pin-Hao Ko
- 1Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei, 100 Taiwan
| | - Chiung-Wei Huang
- 2Department of Physiology, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807 Taiwan
| | - Hen-Hong Chang
- 3School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, 404 Taiwan.,4Department of Chinese Medicine, China Medical University Hospital, Taichung, 404 Taiwan
| | - Eric Y Chuang
- 5Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, 106 Taiwan.,6Bioinformatics and Biostatistics Core, Center of Genomic Medicine, National Taiwan University, Taipei, 100 Taiwan
| | - Mong-Hsun Tsai
- 6Bioinformatics and Biostatistics Core, Center of Genomic Medicine, National Taiwan University, Taipei, 100 Taiwan.,7Institute of Biotechnology, National Taiwan University, Taipei, 106 Taiwan
| | - Liang-Chuan Lai
- 1Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei, 100 Taiwan.,6Bioinformatics and Biostatistics Core, Center of Genomic Medicine, National Taiwan University, Taipei, 100 Taiwan
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24
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Florczyk-Soluch U, Józefczuk E, Stępniewski J, Bukowska-Strakova K, Mendel M, Viscardi M, Nowak WN, Józkowicz A, Dulak J. Various roles of heme oxygenase-1 in response of bone marrow macrophages to RANKL and in the early stage of osteoclastogenesis. Sci Rep 2018; 8:10797. [PMID: 30018287 PMCID: PMC6050304 DOI: 10.1038/s41598-018-29122-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 07/05/2018] [Indexed: 11/09/2022] Open
Abstract
Heme oxygenase-1 (HO-1; encoded by Hmox1), a downstream target of the Nrf2 transcription factor, has been postulated to be a negative regulator of osteoclasts (OCLs) differentiation. Here, we further explored such a hypothesis by examining HO-1 effects in different stages of osteoclastogenesis. We confirmed the inhibition of the expression of OCLs markers by Nrf2. In contrast, both the lack of the active Hmox1 gene or HO-1 silencing in OCLs precursor cells, bone marrow macrophages (BMMs), decreased their differentiation towards OCLs, as indicated by the analysis of OCLs markers such as TRAP. However, no effect of HO-1 deficiency was observed when HO-1 expression was silenced in BMMs or RAW264.7 macrophage cell line pre-stimulated with RANKL (considered as early-stage OCLs). Moreover, cobalt protoporphyrin IX (CoPPIX) or hemin, the known HO-1 inducers, inhibited OCLs markers both in RANKL-stimulated RAW264.7 cells and BMMs. Strikingly, a similar effect occurred in HO-1-/- cells, indicating HO-1-independent activity of CoPPIX and hemin. Interestingly, plasma of HO-1-/- mice contained higher TRAP levels, which suggests an increased number of bone-resorbing OCLs in the absence of HO-1 in vivo. In conclusion, our data indicate that HO-1 is involved in the response of bone marrow macrophages to RANKL and the induction of OCLs markers, but it is dispensable in early-stage OCLs. However, in vivo HO-1 appears to inhibit OCLs formation.
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Affiliation(s)
- Urszula Florczyk-Soluch
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
| | - Ewelina Józefczuk
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Jacek Stępniewski
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Karolina Bukowska-Strakova
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Mateusz Mendel
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Monika Viscardi
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Witold Norbert Nowak
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Alicja Józkowicz
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Józef Dulak
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland. .,Kardio-Med Silesia, Zabrze, Poland.
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25
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Abstract
Recent studies with murine models of cell-specific loss- or gain-of-function of FoxOs have provided novel insights into the function and signaling of these transcription factors on the skeleton. They have revealed that FoxO actions in chondrocytes are critical for normal skeletal development, and FoxO actions in cells of the osteoclast or osteoblast lineage greatly influence bone resorption and formation and, consequently, bone mass. FoxOs also act in osteoblast progenitors to inhibit Wnt signaling and bone formation. Additionally, FoxOs decrease bone resorption via direct antioxidant effects on osteoclasts and upregulation of the antiosteoclastogenic cytokine OPG in cells of the osteoblast lineage. Deacetylation of FoxOs by the NAD-dependent histone deacetylase Sirt1 in both osteoblasts and osteoclasts stimulates bone formation and inhibits bone resorption, making Sirt1 activators promising therapeutic agents for diseases of low bone mass. In this chapter, we review these advances and discuss their implications for the pathogenesis and treatment of estrogen deficiency-, Type 1 diabetes-, and age-related osteoporosis.
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Affiliation(s)
- Ha-Neui Kim
- Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Srividhya Iyer
- University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Rebecca Ring
- Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Maria Almeida
- Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, AR, United States; University of Arkansas for Medical Sciences, Little Rock, AR, United States.
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26
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Zhou L, Chen X, Yan J, Li M, Liu T, Zhu C, Pan G, Guo Q, Yang H, Pei M, He F. Melatonin at pharmacological concentrations suppresses osteoclastogenesis via the attenuation of intracellular ROS. Osteoporos Int 2017; 28:3325-3337. [PMID: 28956094 PMCID: PMC9841502 DOI: 10.1007/s00198-017-4127-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/14/2017] [Indexed: 01/19/2023]
Abstract
UNLABELLED Osteoporosis is linked to age-related decline of melatonin production; however, the direct effects of melatonin on osteoclastogenesis remain unknown. Our study demonstrates that melatonin at pharmacological concentrations, rather than at physiological concentrations, significantly inhibits osteoclastogenesis. Melatonin-mediated anti-osteoclastogenesis involves a reactive oxygen species (ROS)-mediated but not a silent information regulator type 1 (SIRT1)-independent pathway. INTRODUCTION Osteoporosis is a bone disorder linked to impaired bone formation and excessive bone resorption. Melatonin has been suggested to treat osteoporosis due to its beneficial actions on osteoblast differentiation. However, the direct effects of melatonin on osteoclastogenesis in bone marrow monocytes (BMMs) remain unknown. This study was to investigate whether melatonin at either physiological or pharmacological concentrations could affect osteoclast differentiation. METHODS Primary BMMs were isolated from the femurs and tibias of C57BL/6 mice and were induced toward multinucleated osteoclasts, in the presence of melatonin at either physiological (0.01 to 10 nM) or pharmacological (1 to 100 μM) concentrations. Tartrate-resistant acid phosphatase (TRAP) staining was used to label multinucleated osteoclasts and the levels of osteoclast-specific genes were evaluated. To further explore the underlying mechanisms, the roles of silent information regulator type 1 (SIRT1) and reactive oxygen species (ROS) were evaluated. RESULTS We found that melatonin at pharmacological concentrations, rather than at physiological concentrations, significantly inhibited osteoclast formation in a dose-dependent manner. The number of TRAP-positive cells and the gene expression of osteoclast-specific markers were significantly downregulated in melatonin-treated BMMs. The melatonin-mediated repression of osteoclast differentiation involved the inhibition of the nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB) signaling pathway. The treatment with SIRT1 inhibitors did not affect osteoclast differentiation but, when supplemented with exogenous hydrogen peroxide, a partial rescue of melatonin-suppressed osteoclastogenesis was observed. CONCLUSION Melatonin at pharmacological doses directly inhibited osteoclastogenesis of BMMs by a ROS-mediated but not a SIRT1-independent pathway.
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Affiliation(s)
- L Zhou
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
- Department of Orthopaedics, Suzhou Science & Technology Town Hospital, Suzhou, 215153, China
| | - X Chen
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou, 215123, China
| | - J Yan
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
| | - M Li
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
| | - T Liu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China
| | - C Zhu
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
| | - G Pan
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
| | - Q Guo
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China
| | - H Yang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China.
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China.
| | - M Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics and Division of Exercise Physiology, West Virginia University, Morgantown, WV, 26505, USA
| | - F He
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, 215006, China.
- Orthopaedic Institute, Medical College, Soochow University, No.708 Renmin Road, Suzhou, Jiangsu, 215007, China.
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Ke K, Sul OJ, Chung SW, Suh JH, Choi HS. Lack of NOD2 attenuates ovariectomy-induced bone loss via inhibition of osteoclasts. J Endocrinol 2017; 235:85-96. [PMID: 28778866 DOI: 10.1530/joe-16-0591] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 08/04/2017] [Indexed: 12/16/2022]
Abstract
Nucleotide-binding oligomerization domain-2 (NOD2) is a pattern recognition receptor of the innate immune system. It interacts with serine-threonine kinases to induce activation of nuclear factor κB (NF-κB), which is important for receptor activator of nuclear factor kappa-B ligand (RANKL) signaling. We tested the idea that NOD2 modulates bone metabolism via an action on osteoclasts (OCs). The absence of NOD2 reduced ovariectomy-induced bone loss in mice, and lowered the area and the activity of OCs, by impairing RANKL signaling. It also reduced the level of reactive oxygen species (ROS), as well as of NF-κB-DNA binding upon RANKL exposure. NOD2 was found to physically interact with nicotinamide adenine dinucleotide phosphate oxidase 1, and this led to increased production of ROS in OCs. Our data suggest that NOD2 contributes to bone loss in estrogen deficiency by elevating ROS levels in OCs.
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Affiliation(s)
- Ke Ke
- Department of Biological SciencesUniversity of Ulsan, Ulsan, Korea
| | - Ok-Joo Sul
- Department of Biological SciencesUniversity of Ulsan, Ulsan, Korea
| | - Soo-Wol Chung
- Department of Biological SciencesUniversity of Ulsan, Ulsan, Korea
| | - Jae-Hee Suh
- Department of PathologyUlsan University Hospital, Ulsan, Korea
| | - Hye-Seon Choi
- Department of Biological SciencesUniversity of Ulsan, Ulsan, Korea
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28
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Sun J, Li J, Li H, Yang H, Chen J, Yang B, Huo F, Guo W, Tian W. tBHQ Suppresses Osteoclastic Resorption in Xenogeneic-Treated Dentin Matrix-Based Scaffolds. Adv Healthc Mater 2017; 6. [PMID: 28696515 DOI: 10.1002/adhm.201700127] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 04/28/2017] [Indexed: 02/05/2023]
Abstract
Extracellularmatrix (ECM)-based scaffolds are important for their potential therapeutic application. Treated dentin matrix (TDM), a kind of ECM, seeded with allogeneic dental follicle stem cells (TDM/aDFC) provides a suitable inductive microenvironment for tooth root regeneration. Considering the limited sources, xenogeneic TDM (xTDM) is a possible alternative to allogeneic TDM; however, xTDM-based scaffold presents severe osteolysis and resorption lacunae causing regenerated tooth root failure. Immune response-induced excessive osteoclastogenesis plays a critical role in xenogeneic scaffold osteolysis and resorption. The impact of antioxidant, tert-butylhydroquinone (tBHQ), on xTDM/aDFCs-induced osteoclastogenesis and osteoclastic resorption in vivo and in vitro are investigated. tBHQ upregulates heme oxygenase-1 release and downregulates high mobility group box 1 mRNA expression. mRNA expression of other osteoclast-related genes including nuclear factor-kappa Bp65, receptor activator of nuclear factor kappa-B, nuclear factor of activated T-cells cytoplasmic 1, cathepsin K, and integrin β3, also decreases significantly. Furthermore, tBHQ-treated xTDM/aDFCs scaffolds implanted into rhesus macaques show reduced osteolysis and osteoclastic resorption by microcomputed tomography and tartrate-resistant acid phosphatase staining. tBHQ-induced suppression of xTDM/aDFC-induced osteoclastogenesis and osteoclastic resorption presents a new strategy for the regeneration of biological tooth root and could be applied to the regeneration of other complex tissues and organs.
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Affiliation(s)
- Jingjing Sun
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Jie Li
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences College of Stomatology Chongqing Medical University Chongqing 401147 China
| | - Hui Li
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Hefeng Yang
- Department of Dental Research The Affiliated Stomatological Hospital of Kunming Medical University Kunming 650031 China
| | - Jinlong Chen
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Bo Yang
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Fangjun Huo
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Weihua Guo
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
- Department of Pediatric Dentistry West China School of Stomatology Sichuan University Chengdu 610041 China
| | - Weidong Tian
- National Engineering Laboratory for Oral Regenerative Medicine West China Hospital of Stomatology Sichuan University Chengdu 610041 China
- Department of Oral and Maxillofacial Surgery West China School of Stomatology Sichuan University Chengdu 610041 China
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Jeon WJ, Kim KM, Kim EJ, Jang WG. Costunolide increases osteoblast differentiation via ATF4-dependent HO-1 expression in C3H10T1/2 cells. Life Sci 2017; 178:94-99. [PMID: 28435036 DOI: 10.1016/j.lfs.2017.04.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 04/07/2017] [Accepted: 04/14/2017] [Indexed: 01/07/2023]
Abstract
AIMS Costunolide is a sesquiterpene lactones used in many herbal medicines, with well-established anti-inflammatory and anti-oxidant functions modulating endoplasmic reticulum (ER) stress pathways, and which promotes the expression of anti-oxidant genes. The aim of this study is to investigate whether costunolide is involved in osteoblast differentiation and, determine the mechanisms of differentiation in mesenchymal stem cells. MAIN METHODS The cytotoxicity of costunolide was identified using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The mRNA and protein expression levels of osteogenic genes were determined by RT-PCR and Western blot analysis. Alkaline phosphate (ALP) staining and Alizarin red S (ARS) staining were performed to evaluate ALP activity and matrix mineralization. Transcriptional activity was detected using a luciferase reporter assay. KEY FINDINGS In this study, we determined that costunolide increased the expression of distal-less homeobox 5 (Dlx5), runt-related transcription factor 2 (Runx2), ALP, and osteocalcin (OC) in C3H10T 1/2 cells. Furthermore, costunolide increased ALP activity and matrix mineralization. Interestingly, costunolide increased ER stress by Bip, activating transcription factor 4 (ATF4) and C/EBP homologous protein (CHOP). However, it did not exert effects on expression of activating transcription factor 6 (ATF6). ATF4 activation has a protective role in oxidative stress, and its transcription induces anti-oxidant genes in cells. Heme oxygenase-1 (HO-1) is a major anti-oxidant enzyme, and is regulated by ATF4. We showed that costunolide treatment increased HO-1 expression. Furthermore, the HO-1 inhibitor, Sn(IV) Protoporphyrin IX dichloride (SnPP) was blocked costunolide-induced Runx2 expression. SIGNIFICANCE Our results revealed that costunolide-induced osteoblast differentiation is regulated by ATF4-dependent HO-1 expression.
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Affiliation(s)
- Wan-Jin Jeon
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongbuk 38453, Republic of Korea; Research Institute of Anti-Aging, Daegu University, Gyeongbuk 38453, Republic of Korea
| | - Kyeong-Min Kim
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongbuk 38453, Republic of Korea; Research Institute of Anti-Aging, Daegu University, Gyeongbuk 38453, Republic of Korea
| | - Eun-Jung Kim
- Brain Science and Engineering Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
| | - Won-Gu Jang
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongbuk 38453, Republic of Korea; Research Institute of Anti-Aging, Daegu University, Gyeongbuk 38453, Republic of Korea; Institute of Industrial and Technology, Daegu University, Gyeongbuk 38453, Republic of Korea.
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Bak SU, Kim S, Hwang HJ, Yun JA, Kim WS, Won MH, Kim JY, Ha KS, Kwon YG, Kim YM. Heme oxygenase-1 (HO-1)/carbon monoxide (CO) axis suppresses RANKL-induced osteoclastic differentiation by inhibiting redox-sensitive NF-κB activation. BMB Rep 2017; 50:103-108. [PMID: 28088947 PMCID: PMC5342874 DOI: 10.5483/bmbrep.2017.50.2.220] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Indexed: 01/20/2023] Open
Abstract
Heme oxygenase (HO-1) catalyzes heme to carbon monoxide (CO), biliverdin/bilirubin, and iron and is known to prevent the pathogenesis of several human diseases. We assessed the beneficial effect of heme degradation products on osteoclastogenesis induced by receptor activator of NF-κB ligand (RANKL). Treatment of RAW264.7 cells with CORM-2 (a CO donor) and bilirubin, but not with iron, decreased RANKL-induced osteoclastogenesis, with CORM-2 having a more potent anti-osteogenic effect. CORM-2 also inhibited RANKL-induced osteoclastogenesis and osteoclastic resorption activity in marrow-derived macrophages. Treatment with hemin, a HO-1 inducer, strongly inhibited RANKL-induced osteoclastogenesis in wild-type macrophages, but was ineffective in HO-1+/− cells. CORM-2 reduced RANKL-induced NFATc1 expression by inhibiting IKK-dependent NF-κB activation and reactive oxygen species production. These results suggest that CO potently inhibits RANKL-induced osteoclastogenesis by inhibiting redox-sensitive NF-κB-mediated NFATc1 expression. Our findings indicate that HO-1/CO can act as an antiresorption agent and reduce bone loss by blocking osteoclast differentiation.
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Affiliation(s)
- Sun-Uk Bak
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Suji Kim
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Hae-Jun Hwang
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Jung-A Yun
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Wan-Sung Kim
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Moo-Ho Won
- Departments of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 24341, Korea
| | - Ji-Yoon Kim
- Department of Anesthesiology and Pain Medicine, Hanyang University Hospital, Seoul 04763, Korea
| | - Kwon-Soo Ha
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Young-Myeong Kim
- Departments of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon 24341, Korea
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Kim H, Lee YD, Kim HJ, Lee ZH, Kim HH. SOD2 and Sirt3 Control Osteoclastogenesis by Regulating Mitochondrial ROS. J Bone Miner Res 2017; 32:397-406. [PMID: 27540894 DOI: 10.1002/jbmr.2974] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 08/08/2016] [Accepted: 08/16/2016] [Indexed: 01/02/2023]
Abstract
Reactive oxygen species (ROS) are an indispensable element of cellular signal transduction in various cell types, including bone cells. In particular, osteoclasts (OCs), cells specialized for bone resorption, utilize ROS as second messengers during receptor activator of NF-κB ligand (RANKL)-induced differentiation and activation. In addition, because of the high energy demands of bone-resorbing activity, OCs contain large amounts of mitochondria, the source of the majority of total ROS. In this study, we focused on the regulation of ROS generated from mitochondria during osteoclastogenesis. We observed that the level of mitochondrial superoxide dismutase 2 (SOD2), an enzyme responsible for reducing superoxide radicals in mitochondria, was increased by RANKL. siRNA-mediated knockdown (KD) of SOD2 increased ROS levels and enhanced OC differentiation. Conversely, overexpression of SOD2 reduced osteoclastogenesis by decreasing ROS levels. Moreover, we found that NAD-dependent deacetylase sirtuin 3 (Sirt3), an activator of SOD2 in mitochondria, was induced by RANKL. Sirt3-targeted siRNA decreased SOD2 activity by reducing deacetylation of lysine 68 of SOD2, leading to increased osteoclastogenesis. Furthermore, in vivo KD of SOD2 or Sirt3 in ICR mouse calvariae decreased bone volume and increased OC surface, supporting the results of in vitro experiments. Taken together, our findings demonstrate for the first time to our knowledge that the regulation of mitochondrial ROS by SOD2 and Sirt3 plays an important role in fine-tuning the OC differentiation program. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Haemin Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, Seoul, Korea
| | - Yong Deok Lee
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, Seoul, Korea
| | - Hyung Joon Kim
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Zang Hee Lee
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, Seoul, Korea
| | - Hong-Hee Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, Seoul, Korea
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Kang H, Yan Y, Jia P, Yang K, Guo C, Chen H, Qi J, Qian N, Xu X, Wang F, Li C, Guo L, Deng L. Desferrioxamine reduces ultrahigh-molecular-weight polyethylene-induced osteolysis by restraining inflammatory osteoclastogenesis via heme oxygenase-1. Cell Death Dis 2016; 7:e2435. [PMID: 27787522 PMCID: PMC5133998 DOI: 10.1038/cddis.2016.339] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 09/13/2016] [Accepted: 09/23/2016] [Indexed: 12/11/2022]
Abstract
As wear particles-induced osteolysis still remains the leading cause of early implant loosening in endoprosthetic surgery, and promotion of osteoclastogenesis by wear particles has been confirmed to be responsible for osteolysis. Therapeutic agents targeting osteoclasts formation are considered for the treatment of wear particles-induced osteolysis. In the present study, we demonstrated for the first time that desferrioxamine (DFO), a powerful iron chelator, could significantly alleviate osteolysis in an ultrahigh-molecular-weight polyethylene (UHMWPE) particles-induced mice calvaria osteolysis model. Furthermore, DFO attenuated calvaria osteolysis by restraining enhanced inflammatory osteoclastogenesis induced by UHMWPE particles. Consistent with the in vivo results, we found DFO was also able to inhibit osteoclastogenesis in a dose-dependent manner in vitro, as evidenced by reduction of osteoclasts formation and suppression of osteoclast specific genes expression. In addition, DFO dampened osteoclasts differentiation and formation at early stage but not at late stage. Mechanistically, the reduction of osteoclastogenesis by DFO was due to increased heme oxygenase-1 (HO-1) expression, as decreased osteoclasts formation induced by DFO was significantly restored after HO-1 was silenced by siRNA, while HO-1 agonist COPP treatment enhanced DFO-induced osteoclastogenesis inhibition. In addition, blocking of p38 mitogen-activated protein kinase (p38MAPK) signaling pathway promoted DFO-induced HO-1 expression, implicating that p38 signaling pathway was involved in DFO-mediated HO-1 expression. Taken together, our results suggested that DFO inhibited UHMWPE particles-induced osteolysis by restraining inflammatory osteoclastogenesis through upregulation of HO-1 via p38MAPK pathway. Thus, DFO might be used as an innovative and safe therapeutic alternative for treating wear particles-induced aseptic loosening.
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Affiliation(s)
- Hui Kang
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yufei Yan
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Peng Jia
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Kai Yang
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Changjun Guo
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hao Chen
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jin Qi
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Niandong Qian
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xing Xu
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fei Wang
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Changwei Li
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lei Guo
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lianfu Deng
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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El Jamal SM, Taylor EB, Abd Elmageed ZY, Alamodi AA, Selimovic D, Alkhateeb A, Hannig M, Hassan SY, Santourlidis S, Friedlander PL, Haikel Y, Vijaykumar S, Kandil E, Hassan M. Interferon gamma-induced apoptosis of head and neck squamous cell carcinoma is connected to indoleamine-2,3-dioxygenase via mitochondrial and ER stress-associated pathways. Cell Div 2016; 11:11. [PMID: 27486476 PMCID: PMC4969639 DOI: 10.1186/s13008-016-0023-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 06/15/2016] [Indexed: 12/25/2022] Open
Abstract
Background Tumor response to immunotherapy is the consequence of a concerted crosstalk between cytokines and effector cells. Interferon gamma (IFNγ) is one of the common cytokines coordinating tumor immune response and the associated biological consequences. Although the role of IFNγ in the modulation of tumor immunity has been widely documented, the mechanisms regulating IFNγ-induced cell death, during the course of immune therapy, is not described in detail. Results IFNγ triggered apoptosis of CLS-354 and RPMI 2650 cells, enhanced the protein expression and activation of indoleamine 2,3-dioxygenase (IDO), and suppressed the basal expression of heme oxygenase-1(HO-1). Interestingly, IFNγ induced the loss of mitochondrial membrane potential (Δψm) and increased accumulation of reactive oxygen species (ROS). The cytokine also induced the activation of Janus kinase (JAK)/Signal Transducer and Activator of Transcription (STAT)1, apoptosis signal-regulating kinase 1 (ASK1), p38, c-jun-N-terminal kinase (JNK) and NF-κB pathways and the transcription factors STAT1, interferon regulatory factor 1 (IRF1), AP-1, ATF-2, NF-κB and p53, and expression of Noxa protein. Furthermore, IFNγ was found to trigger endoplasmic reticulum (ER) stress as evidenced by the cleavage of caspase-4 and activation of protein kinase RNA-like endoplasmic reticulum kinase (PERK) and inositol-requiring-1α (IRE1α) pathways. Using specific inhibitors, we identified a potential role for IDO as apoptotic mediator in the regulation of IFNγ-induced apoptosis of head and neck squamous cell carcinoma (HNSCC) cells via Noxa-mediated mitochondrial dysregulation and ER stress. Conclusion In addition to the elucidation of the role of IDO in the modulation of apoptosis, our study provides new insights into the molecular mechanisms of IFNγ-induced apoptosis of HNSCC cells during the course of immune therapy.
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Affiliation(s)
- Siraj M El Jamal
- Department of Pathology, University of Mississippi Medical Center, Jackson, MS 39216 USA
| | - Erin B Taylor
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216 USA
| | | | - Abdulhadi A Alamodi
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216 USA
| | - Denis Selimovic
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, Kirrberger Str. 100, 66421 Homburg/Saar, Germany ; Division of Oral Health Science, Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Abdulaziz Alkhateeb
- Clinic of Dermatology, University Hospital of Aachen, Puwelstrasse 30, Aachen, Germany ; College of Medicine, King Faisal University, Alhofuf, Saudi Arabia
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, Kirrberger Str. 100, 66421 Homburg/Saar, Germany
| | - Sofie Y Hassan
- Clinic of Dermatology, University Hospital of Aachen, Puwelstrasse 30, Aachen, Germany
| | - Simeon Santourlidis
- Epigenetics Core Laboratory, Institute of Transplantation Diagnostics and Cell Therapeutics, University Hospital of Duesseldorf, Heinrich-Heine-University of Duesseldorf, Mooren Str.5, 40225 Duesseldorf, Germany
| | - Paul L Friedlander
- Departments of Surgery, Tulane University School of Medicine, New Orleans, LA 70112 USA
| | - Youssef Haikel
- Institut National de la Santé et de la Recherche Médicale, University of Strasbourg, 67000 Strasbourg, France ; Department of Operative Dentistry and Endodontics, Dental Faculty, University of Strasbourg, 67000 Strasbourg, France
| | - Srinivasan Vijaykumar
- Department of Radiation Oncology, University of Mississippi Medical Center, Jackson, MS 39216 USA ; Cancer Institute, University of Mississippi Medical Center, Jackson, MS 39216 USA
| | - Emad Kandil
- Departments of Surgery, Tulane University School of Medicine, New Orleans, LA 70112 USA
| | - Mohamed Hassan
- Department of Pathology, University of Mississippi Medical Center, Jackson, MS 39216 USA ; Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, Kirrberger Str. 100, 66421 Homburg/Saar, Germany ; Institut National de la Santé et de la Recherche Médicale, University of Strasbourg, 67000 Strasbourg, France ; Cancer Institute, University of Mississippi Medical Center, Jackson, MS 39216 USA
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Suzuki T, Katsumata SI, Matsuzaki H, Suzuki K. Dietary zinc deficiency induces oxidative stress and promotes tumor necrosis factor-α- and interleukin-1β-induced RANKL expression in rat bone. J Clin Biochem Nutr 2016; 58:122-9. [PMID: 27013778 PMCID: PMC4788406 DOI: 10.3164/jcbn.15-87] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/07/2015] [Indexed: 12/03/2022] Open
Abstract
We investigated the effects of dietary zinc deficiency on oxidative stress and bone metabolism. Four-week-old male Wistar rats were randomly assigned to one of three groups for 4 weeks: a zinc-adequate group (30 ppm); a zinc-deficient group (1 ppm); and a pair-fed group (30 ppm) that was pair-fed to the zinc-deficient group. The iron content and the thiobarbituric acid reactive substance level in bone were higher in the zinc-deficient group than in the zinc-adequate and pair-fed groups. The mRNA expression level of osteoblastogenesis-related genes such as bone morphogenetic protein 2 and runt-related transcription factor 2 was lower in the zinc-deficient group than in the zinc-adequate and pair-fed groups. In contrast, the mRNA expression levels of tumor necrosis factor-α, interleukin-1β and osteoclastogenesis-related genes such as receptor activator of nuclear factor-κB ligand and nuclear factor of activated T cells cytoplasmic 1 were higher in the zinc-deficient group than in the zinc-adequate and pair-fed groups. These findings suggested that dietary zinc deficiency reduced osteoblastogenesis via a decrease in the expression of bone morphogenetic protein 2 and increased osteoclastogenesis via enhancement of the expression of receptor for activator of nuclear factor-κB ligand induced by oxidative stress-stimulated tumor necrosis factor-α and interleukin-1β.
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Affiliation(s)
- Takako Suzuki
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Shin-Ichi Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Hiroshi Matsuzaki
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Kazuharu Suzuki
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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35
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Kanzaki H, Shinohara F, Kanako I, Yamaguchi Y, Fukaya S, Miyamoto Y, Wada S, Nakamura Y. Molecular regulatory mechanisms of osteoclastogenesis through cytoprotective enzymes. Redox Biol 2016; 8:186-91. [PMID: 26795736 PMCID: PMC4732015 DOI: 10.1016/j.redox.2016.01.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 01/05/2016] [Accepted: 01/08/2016] [Indexed: 12/30/2022] Open
Abstract
It has been reported that reactive oxygen species (ROS), such as hydrogen peroxide and superoxide, take part in osteoclast differentiation as intra-cellular signaling molecules. The current assumed signaling cascade from RANK to ROS production is RANK, TRAF6, Rac1, and then Nox. The target molecules of ROS in RANKL signaling remain unclear; however, several reports support the theory that NF-κB signaling could be the crucial downstream signaling molecule of RANKL-mediated ROS signaling. Furthermore, ROS exert cytotoxic effects such as peroxidation of lipids and phospholipids and oxidative damage to proteins and DNA. Therefore, cells have several protective mechanisms against oxidative stressors that mainly induce cytoprotective enzymes and ROS scavenging. Three well-known mechanisms regulate cytoprotective enzymes including Nrf2-, FOXO-, and sirtuin-dependent mechanisms. Several reports have indicated a crosslink between FOXO- and sirtuin-dependent regulatory mechanisms. The agonists against the regulatory mechanisms are reported to induce these cytoprotective enzymes successfully. Some of them inhibit osteoclast differentiation and bone destruction via attenuation of intracellular ROS signaling. In this review article, we discuss the above topics and summarize the current information available on the relationship between cytoprotective enzymes and osteoclastogenesis.
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Affiliation(s)
- Hiroyuki Kanzaki
- Tohoku University Hospital, Maxillo-Oral Disorders, Japan; Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan.
| | - Fumiaki Shinohara
- Tohoku University Graduate School of Dentistry, Oral Microbiology, Japan
| | - Itohiya Kanako
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
| | - Yuuki Yamaguchi
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
| | - Sari Fukaya
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
| | - Yutaka Miyamoto
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
| | - Satoshi Wada
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
| | - Yoshiki Nakamura
- Department of orthodontics, School of Dental Medicine, Tsurumi University, Japan
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36
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Ke K, Sul OJ, Rajasekaran M, Choi HS. MicroRNA-183 increases osteoclastogenesis by repressing heme oxygenase-1. Bone 2015; 81:237-246. [PMID: 26163109 DOI: 10.1016/j.bone.2015.07.006] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 07/03/2015] [Accepted: 07/06/2015] [Indexed: 11/22/2022]
Abstract
Emerging evidence suggests that microRNAs (miRs) influence skeletal structure by modulating osteoclastogenesis and bone resorption. We have demonstrated previously that the up-regulation of heme oxygenase-1 (HO-1) attenuated osteoclastogenesis in bone marrow-derived macrophages (BMMs). RANKL-induced osteoclastogenesis elevates microRNA-183 (miR-183) in BMM. We show here that HO-1 is a target gene of miR-183 and that this miRNA binds to the 3'-UTR of HO-1. We find that a synthetic inhibitor that binds to miR-183 decreases osteoclast (OC) differentiation and increases the expression of HO-1, while a mimic of endogenous mature miR-183 has the opposite effect. Moreover, the HO-1 inducers, resveratrol and piceatannol decrease the expression of miR-183, resulting in attenuated osteoclastogenesis. Our findings reveal how miR-183 affects OC formation.
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Affiliation(s)
- Ke Ke
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 680-749, South Korea
| | - Ok-Joo Sul
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 680-749, South Korea
| | - Monisha Rajasekaran
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 680-749, South Korea
| | - Hye-Seon Choi
- Department of Biological Sciences (BK21 Program), University of Ulsan, Ulsan 680-749, South Korea.
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37
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Kim HN, Han L, Iyer S, de Cabo R, Zhao H, O'Brien CA, Manolagas SC, Almeida M. Sirtuin1 Suppresses Osteoclastogenesis by Deacetylating FoxOs. Mol Endocrinol 2015; 29:1498-509. [PMID: 26287518 DOI: 10.1210/me.2015-1133] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Activation of Sirtuin1 (Sirt1), an nicotinamide adenine dinucleotide oxidized-dependent deacetylase, by natural or synthetic compounds like resveratrol, SRT2104, or SRT3025 attenuates the loss of bone mass caused by ovariectomy, aging, or unloading in mice. Conversely, Sirt1 deletion in osteoclast progenitors increases osteoclast number and bone resorption. Sirt1 deacetylates forkhead box protein (Fox) O1, FoxO3, and FoxO4, and thereby modulates their activity. FoxOs restrain osteoclastogenesis and bone resorption. Here, we tested the hypothesis that the antiresorptive effects of Sirt1 are mediated by FoxOs. We report that Sirt1 activation by SRT2104 and SRT3025 inhibited murine osteoclast progenitor proliferation and reduced osteoclastogenesis. The effect of Sirt1 stimulators on osteoclastogenesis was abrogated in cells lacking FoxO1, FoxO3, and FoxO4. FoxO1 acetylation was increased by knocking down Sirt1 or addition of receptor activator of nuclear factor kappa-B ligand, the critical cytokine for osteoclast differentiation. Furthermore, acetylation inhibited, whereas deacetylation promoted, FoxO-mediated transcription. SRT3025 increased the expression of the FoxO-target genes catalase and hemeoxygenase-1 (HO-1) in osteoclast progenitors, in a FoxO-dependent manner. HO-1 catabolizes heme and attenuates mitochondrial oxidative phosphorylation and ATP production in macrophages. HO-1 levels were strongly reduced and ATP levels increased by Receptor activator of nuclear factor kappa-B ligand. In contrast, SRT3025 and FoxOs decreased ATP production, and the effect of SRT3025 was mediated by FoxOs. These findings reveal that the antiosteoclastogenic actions of Sirt1 are mediated by FoxOs and result from impaired mitochondria activity. Along with earlier findings that the osteoblastogenic effects of Sirt1 are also mediated by FoxOs, these results establish that the dual antiosteoporotic efficacy of Sirt1 stimulators (ie, decreasing bone resorption and promoting bone formation) is mediated via FoxO deacetylation.
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Affiliation(s)
- Ha-Neui Kim
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Li Han
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Srividhya Iyer
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Rafael de Cabo
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Haibo Zhao
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Charles A O'Brien
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Stavros C Manolagas
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
| | - Maria Almeida
- Division of Endocrinology and Metabolism (H.-N.K., L.H., S.I., H.Z., C.A.O., S.C.M., M.A.), Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences and the Central Arkansas Veterans Healthcare System, Little Rock, Arkansas 72205; and Translational Gerontology Branch (R.d.C.), National Institute on Aging, Baltimore, Maryland 21224
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