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Kim C. Extracellular Signal-Regulated Kinases Play Essential but Contrasting Roles in Osteoclast Differentiation. Int J Mol Sci 2023; 24:15342. [PMID: 37895023 PMCID: PMC10607827 DOI: 10.3390/ijms242015342] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Bone homeostasis is regulated by the balanced actions of osteoblasts that form the bone and osteoclasts (OCs) that resorb the bone. Bone-resorbing OCs are differentiated from hematopoietic monocyte/macrophage lineage cells, whereas osteoblasts are derived from mesenchymal progenitors. OC differentiation is induced by two key cytokines, macrophage colony-stimulating factor (M-CSF), a factor essential for the proliferation and survival of the OCs, and receptor activator of nuclear factor kappa-B ligand (RANKL), a factor for responsible for the differentiation of the OCs. Mitogen-activated protein kinases (MAPKs), including extracellular signal-regulated kinases (ERKs), p38, and c-Jun N-terminal kinases, play an essential role in regulating the proliferation, differentiation, and function of OCs. ERKs have been known to play a critical role in the differentiation and activation of OCs. In most cases, ERKs positively regulate OC differentiation and function. However, several reports present conflicting conclusions. Interestingly, the inhibition of OC differentiation by ERK1/2 is observed only in OCs differentiated from RAW 264.7 cells. Therefore, in this review, we summarize the current understanding of the conflicting actions of ERK1/2 in OC differentiation.
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Affiliation(s)
- Chaekyun Kim
- BK21 Program in Biomedical Science & Engineering, Laboratory for Leukocyte Signaling Research, Department of Pharmacology, College of Medicine, Inha University, Incheon 22212, Republic of Korea
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2
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Choi EB, Agidigbi TS, Kang IS, Kim C. ERK Inhibition Increases RANKL-Induced Osteoclast Differentiation in RAW 264.7 Cells by Stimulating AMPK Activation and RANK Expression and Inhibiting Anti-Osteoclastogenic Factor Expression. Int J Mol Sci 2022; 23:13512. [PMID: 36362318 PMCID: PMC9656104 DOI: 10.3390/ijms232113512] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/20/2022] [Accepted: 10/30/2022] [Indexed: 08/13/2023] Open
Abstract
Bone absorption is necessary for the maintenance of bone homeostasis. An osteoclast (OC) is a monocyte-macrophage lineage cell that absorbs bone tissue. Extracellular signal-regulated kinases (ERKs) are known to play important roles in regulating OC growth and differentiation. In this study, we examined specific downstream signal pathways affected by ERK inhibition during OC differentiation. Our results showed that the ERK inhibitors PD98059 and U0126 increased receptor activator of NF-κB ligand (RANKL)-induced OC differentiation in RAW 264.7 cells, implying a negative role in OC differentiation. This is supported by the effect of ERK2-specific small interfering RNA on increasing OC differentiation. In contrast to our findings regarding the RAW 264.7 cells, the ERK inhibitors attenuated the differentiation of bone marrow-derived cells into OCs. The ERK inhibitors significantly increased the phosphorylation of adenosine 5'-monophosphate-activated protein kinase (AMPK) but not the activation of p38 MAPK, Lyn, and mTOR. In addition, while the ERK inhibition increased the expression of the RANKL receptor RANK, it decreased the expression of negative mediators of OC differentiation, such as interferon regulatory factor-8, B-cell lymphoma 6, and interferon-γ. These dichotomous effects of ERK inhibition suggest that while ERKs may play positive roles in bone marrow-derived cells, ERKs may also play negative regulatory roles in RAW 264.7 cells. These data provide important information for drug development utilizing ERK inhibitors in OC-related disease treatment.
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Affiliation(s)
- Eun-Bi Choi
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon 22212, Korea
- BK21 Program in Biomedical Science & Engineering, Inha University, Incheon 22212, Korea
| | - Taiwo Samuel Agidigbi
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon 22212, Korea
| | - In-Soon Kang
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon 22212, Korea
- BK21 Program in Biomedical Science & Engineering, Inha University, Incheon 22212, Korea
| | - Chaekyun Kim
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon 22212, Korea
- BK21 Program in Biomedical Science & Engineering, Inha University, Incheon 22212, Korea
- Convergent Research Center for Metabolism and Immunoregulation, Inha University, Incheon 22212, Korea
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3
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Long F, Chen R, Su Y, Liang J, Xian Y, Yang F, Lian H, Xu J, Zhao J, Liu Q. Epoxymicheliolide inhibits osteoclastogenesis and resists OVX-induced osteoporosis by suppressing ERK1/2 and NFATc1 signaling. Int Immunopharmacol 2022; 107:108632. [DOI: 10.1016/j.intimp.2022.108632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/30/2022] [Accepted: 02/13/2022] [Indexed: 02/02/2023]
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Melatonin Attenuates RANKL-Induced Osteoclastogenesis via Inhibition of Atp6v0d2 and DC-STAMP through MAPK and NFATc1 Signaling Pathways. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020501. [PMID: 35056817 PMCID: PMC8781594 DOI: 10.3390/molecules27020501] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 12/27/2022]
Abstract
Melatonin is a hormone secreted by the pineal gland that is involved in the biorhythm of reproductive activities. The present study investigated the inhibitory effects of melatonin on osteoclastogenesis in RAW 264.7 cells according to changes in V-ATPase and the corresponding inhibition of the MAPK and NFATc1 signaling processes. Methods: the cytotoxic effect of melatonin was investigated by MTT assay. Osteoclast differentiation and gene expression of osteoclast-related factors were confirmed via TRAP staining, pit formation assay, immunofluorescence imaging, western blot, and real-time PCR. Results: melatonin was found to inactivate the p38 and JNK of MAP kinase in RAW264.7 cells treated with RANKL and treated with a combination RANKL and melatonin for 1, 3, and 5 days. The melatonin treatment group showed a reduction in osteoclastogenesis transcription factors and ATP6v0d2 gene expression. Conclusions: melatonin inhibits osteoclast differentiation and cell fusion by inhibiting the expression of Atp6v0d2 through the inactivation of MAPK and NFATc1 signaling in RANKL-stimulated RAW264.7 macrophages. The findings of the present study suggest that melatonin could be a suitable therapy for bone loss and imply a potential role of melatonin in bone health.
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Russo R, Mallia S, Zito F, Lampiasi N. Long-Lasting Activity of ERK Kinase Depends on NFATc1 Induction and Is Involved in Cell Migration-Fusion in Murine Macrophages RAW264.7. Int J Mol Sci 2020; 21:ijms21238965. [PMID: 33255852 PMCID: PMC7728313 DOI: 10.3390/ijms21238965] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023] Open
Abstract
Macrophages are mononuclear cells that become osteoclasts (OCs) in the presence of two cytokines, macrophage colony-stimulating factor (M-CSF), and receptor activator of NF-κB ligand (RANKL). RANKL binding to its specific receptor RANK leads to OCs differentiation mainly by nuclear factor of activated T-cells cytoplasmic 1 (NFATc1). In our previous study, the analysis of the protein network in NFATc1-knockdown cells, using the Ingenuity Pathway Analysis (IPA), showed a link between NFATc1 and Mitogen-activated protein kinase kinase (MEK)-extracellular receptor kinase (ERK) signaling pathway. Therefore, this study aimed to extend our knowledge of the relationship between NFATc1 and the ERK. Here, we demonstrate that delayed ERK1/2 phosphorylation in pre-OC RANKL-induced depends on NFATc1. Indeed, the knockdown of NFATc1 reduced the phosphorylation of ERK1/2 (60%) and the pharmacological inhibition of the ERK1/2 kinase activity impairs the expression of NFATc1 without preventing its translocation into the nucleus. Furthermore, silencing of NFATc1 significantly reduced RANKL-induced migration (p < 0.01), and most pre-OCs are still mononuclear after 48 h (80 ± 5%), despite the presence of actin rings. On the other hand, the inhibitors FR180204 and PD98059 significantly reduced RANKL-induced cell migration (p < 0.01), leading to a reduction in the number of multinucleated cells. Finally, we suggest that long-lasting ERK activity depends on NFATc1 induction and is likely linked to cell migration, fusion, and OC differentiation.
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Abudhahir M, Saleem A, Paramita P, Kumar SD, Tze‐Wen C, Selvamurugan N, Moorthi A. Polycaprolactone fibrous electrospun scaffolds reinforced with copper doped wollastonite for bone tissue engineering applications. J Biomed Mater Res B Appl Biomater 2020; 109:654-664. [DOI: 10.1002/jbm.b.34729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/20/2020] [Accepted: 09/02/2020] [Indexed: 01/07/2023]
Affiliation(s)
- Mohamed Abudhahir
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam Chennai Tamil Nadu India
| | - Azeena Saleem
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam Chennai Tamil Nadu India
| | - Pragyan Paramita
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam Chennai Tamil Nadu India
| | - Sukumar Dinesh Kumar
- Department of Biomedical Science, Peptide Biochemistry Chosun University Gwangju Republic of Korea
| | - Chung Tze‐Wen
- Department of Biomedical Engineering National Yang‐Ming University Taipei Taiwan
| | - Nagarajan Selvamurugan
- Tissue Engineering and Cancer Research Laboratory, Department of Biotechnology SRM University Kattankulathur Tamil Nadu India
| | - Ambigapathi Moorthi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam Chennai Tamil Nadu India
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Osteoclast Multinucleation: Review of Current Literature. Int J Mol Sci 2020; 21:ijms21165685. [PMID: 32784443 PMCID: PMC7461040 DOI: 10.3390/ijms21165685] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 12/14/2022] Open
Abstract
Multinucleation is a hallmark of osteoclast maturation. The unique and dynamic multinucleation process not only increases cell size but causes functional alterations through reconstruction of the cytoskeleton, creating the actin ring and ruffled border that enable bone resorption. Our understanding of the molecular mechanisms underlying osteoclast multinucleation has advanced considerably in this century, especially since the identification of DC-STAMP and OC-STAMP as “master fusogens”. Regarding the molecules and pathways surrounding these STAMPs, however, only limited progress has been made due to the absence of their ligands. Various molecules and mechanisms other than the STAMPs are involved in osteoclast multinucleation. In addition, several preclinical studies have explored chemicals that may be able to target osteoclast multinucleation, which could enable us to control pathogenic bone metabolism more precisely. In this review, we will focus on recent discoveries regarding the STAMPs and other molecules involved in osteoclast multinucleation.
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Endogenous Collagenases Regulate Osteoclast Fusion. Biomolecules 2020; 10:biom10050705. [PMID: 32370054 PMCID: PMC7277558 DOI: 10.3390/biom10050705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/25/2020] [Accepted: 04/28/2020] [Indexed: 12/26/2022] Open
Abstract
The precise regulation of osteoclast differentiation and function is crucial for the maintenance of healthy bone. Despite several reports of collagenase expression in bone tissues, the precise isoform expression as well as the role in osteoclasts are still unclear. In the present report, the expression of matrix metalloprotease (MMP)8 and MMP13 was confirmed in mouse bone marrow macrophage osteoclast precursors. The mRNA and protein expressions of both collagenases were significantly reduced by receptor activator of nuclear factor κB ligand (RANKL) stimulation. Notably, either inhibition of MMP expression by siRNA or treatment of cells with collagenase inhibitor Ro 32-3555 significantly augmented osteoclast fusion and resorption activity without affecting the osteoclast number. The inhibition of collagenase by Ro 32-3555 increased the expression of osteoclast fusion genes, Atp6v0d2 and Dcstamp, without affecting nuclear factor of activated T-cells, cytoplasmic 1 (NFATc1) protein expression. The enhanced osteoclast fusion by collagenase inhibition appears to be mediated through an extracellular signal regulated kinase (ERK)-dependent pathway. Collectively, these data provide novel information on the regulation of osteoclast fusion process.
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Agidigbi TS, Kang IS, Kim C. Inhibition of MEK/ERK upregulates GSH production and increases RANKL-induced osteoclast differentiation in RAW 264.7 cells. Free Radic Res 2020; 54:894-905. [DOI: 10.1080/10715762.2020.1742896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Taiwo Samuel Agidigbi
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology, Inha University School of Medicine, Incheon, Korea
| | - In Soon Kang
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology, Inha University School of Medicine, Incheon, Korea
| | - Chaekyun Kim
- Laboratory for Leukocyte Signaling Research, Department of Pharmacology, Inha University School of Medicine, Incheon, Korea
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10
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Yuan Y, Chen K, Chen X, Wang C, Qiu H, Cao Z, Song D, Sun Y, Guo J, Tickner J, Xu J, Zou J. Fumitremorgin C Attenuates Osteoclast Formation and Function via Suppressing RANKL-Induced Signaling Pathways. Front Pharmacol 2020; 11:238. [PMID: 32210820 PMCID: PMC7076231 DOI: 10.3389/fphar.2020.00238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 02/21/2020] [Indexed: 12/26/2022] Open
Abstract
Excessive bone resorption conducted by osteoclasts is considered as the main cause of osteoclast-related bone diseases such as osteoporosis. Therefore, the suppression of excessive osteoclast formation and function is one of the strategies to treat osteoclast-related bone diseases. Fumitremorgin C (Fum) is a mycotoxin extracted from Aspergillus fumigatus. It has been shown to have extensive pharmacological properties, but its role in the treatment of osteoclast-related bone diseases remains unclear. In this study, we aim to find out whether Fum can inhibit the receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclast formation and function. The results showed that Fum could significantly attenuate osteoclast formation and function at concentrations from 2.5 to 10 µM. The protein expression of bone resorption factors such as NFATc1, cathepsin K, V-ATPase-d2, and c-Fos was suppressed with the treatment of Fum at a concentration of 10 µM. In addition, Fum was also shown to suppress the activity of NF-κB, intracellular reactive oxygen species level, and MAPK pathway. Taken together, the present study showed that Fum could attenuate the formation and function of osteoclast via suppressing RANKL-induced signaling pathways, suggesting that Fum might be a potential novel drug in the treatment of osteoclast-related bone diseases.
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Affiliation(s)
- Yu Yuan
- School of Kinesiology, Shanghai University of Sport, Shanghai, China.,School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia.,School of Physical Education and Sports Science, South China Normal University, Guangzhou, China
| | - Kai Chen
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia.,Department of Orthopaedic Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xi Chen
- School of Sports Science, Wenzhou Medical University, Wenzhou, China
| | - Chao Wang
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Heng Qiu
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Zhen Cao
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Dezhi Song
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Youqiang Sun
- Department of Orthopedics, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianmin Guo
- School of Kinesiology, Shanghai University of Sport, Shanghai, China.,School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Jennifer Tickner
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Jun Zou
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
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11
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Zhang T, Han W, Zhao K, Yang W, Lu X, Jia Y, Qin A, Qian Y. Psoralen accelerates bone fracture healing by activating both osteoclasts and osteoblasts. FASEB J 2019; 33:5399-5410. [PMID: 30702934 DOI: 10.1096/fj.201801797r] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Bone fracture healing is a complex, dynamic process that involves various cell types, with osteoclasts and osteoblasts playing indispensable roles. In this study, we found that psoralen, the main active ingredient in Psoralea corylifolia L. fruit extract, enhanced bone fracture healing through activation of osteoclast and osteoblast activity via the ERK signaling pathway. In detail, psoralen promoted receptor activator of nuclear factor-κB ligand-induced osteoclastogenesis, mRNA expression of osteoclast-specific genes, and osteoclastic bone resorption in primary bone marrow-derived macrophages. Meanwhile, psoralen induced osteogenic differentiation by promoting the mRNA expression of the osteoblast differentiation markers alkaline phosphatase, runt-related transcription factor 2, osterix, and osteocalcin. At the molecular level, psoralen preferentially activated ERK1/2 but not JNK or p38 MAPKs. Further experiments revealed that psoralen-induced osteoclast and osteoblast differentiation was abrogated by a specific inhibitor of phosphorylated ERK. In addition, psoralen accelerated bone fracture healing in a rat tibial fracture model, and the numbers of osteoclasts and osteoblasts were increased in psoralen-treated fracture callus. Taken together, our findings indicate that psoralen accelerates bone fracture healing through activation of osteoclasts and osteoblasts via ERK signaling and has potential as a novel drug in the orthopedic clinic for the treatment of bone fractures.-Zhang, T., Han, W., Zhao, K., Yang, W., Lu, X., Jia, Y., Qin, A., Qian, Y. Psoralen accelerates bone fracture healing by activating both osteoclasts and osteoblasts.
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Affiliation(s)
- Tan Zhang
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - Weiqi Han
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - Kangxian Zhao
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - Wanlei Yang
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - Xuanyuan Lu
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - Yewei Jia
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
| | - An Qin
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yu Qian
- Department of Orthopaedics, Shaoxing People's Hospital, Zhejiang University School of Medicine, Shaoxing, China
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12
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Wang S, Liu Z, Wang J, Wang Y, Liu J, Ji X, Wang X. The triptolide-induced apoptosis of osteoclast precursor by degradation of cIAP2 and treatment of rheumatoid arthritis of TNF-transgenic mice. Phytother Res 2018; 33:342-349. [PMID: 30417444 DOI: 10.1002/ptr.6224] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/10/2018] [Accepted: 10/09/2018] [Indexed: 01/03/2023]
Abstract
This study aims to discuss the effect of triptolide (TPL) on rheumatoid arthritis (RA) and the mechanism related to osteoclast precursor (OCP) and osteoclast (OC). TNF-transgenic RA mice were treated with different doses of TPL by gavage. After the administration was finished, the curative effects were evaluated and compared, and the OCP apoptosis rates, the OC number, and the OC differentiation ability in vitro were detected. Finally, splenocytes of wild-type mice were cultured in vitro and induced to differentiate into OCP, and the cell apoptosis rate, cIAP2, and apoptotic effectors expression level were detected after cIAP2 overexpression and TPL administration. After TPL administration, the RA symptoms in the TPL groups were all better, the apoptosis rate of OCP was higher, and the amount of OC in vitro were lower than that in the control group (all P < 0.05), and all of the changes in the high-dose group were more obvious than the low-dose group. In splenocytes cells cultured in vitro, cIAP2 overexpression could decrease the apoptosis rate of OCPs and increase the OC number, and TPL treatment could down-regulate the cIAP2 and promote OCP apoptosis and OC reduction. In conclusion, TPL could induce OCP apoptosis and inhibit OC formation to effectively treat RA by mediating cIAP2 degradation.
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Affiliation(s)
- Shengli Wang
- Orthopedics Department, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Zhigang Liu
- Orthopedics Department, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Jingchun Wang
- Department of Pharmacy, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Yifei Wang
- Orthopedics Department, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Jianhua Liu
- Orthopedics Department, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Xinying Ji
- Henan International Joint Laboratory of Nuclear Protein Regulation, Henan University Medical College, Kaifeng, China
| | - Xinchun Wang
- Henan International Joint Laboratory of Nuclear Protein Regulation, Henan University Medical College, Kaifeng, China
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Oh JH, Lee NK. Up-Regulation of RANK Expression via ERK1/2 by Insulin Contributes to the Enhancement of Osteoclast Differentiation. Mol Cells 2017; 40:371-377. [PMID: 28535663 PMCID: PMC5463046 DOI: 10.14348/molcells.2017.0025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/20/2017] [Accepted: 04/28/2017] [Indexed: 01/13/2023] Open
Abstract
Despite the importance of the receptor activator of nuclear factor (NF)-kappaB ligand (RANKL)-RANK signaling mechanisms on osteoclast differentiation, little has been studied on how RANK expression is regulated or what regulates its expression during osteoclastogenesis. We show here that insulin signaling increases RANK expression, thus enhancing osteoclast differentiation by RANKL. Insulin stimulation induced RANK gene expression in time- and dose-dependent manners and insulin receptor shRNA completely abolished RANK expression induced by insulin in bone marrow-derived monocyte/macrophage cells (BMMs). Moreover, the addition of insulin in the presence of RANKL promoted RANK expression. The ability of insulin to regulate RANK expression depends on extracellular signal-regulated kinase 1/2 (ERK1/2) since only PD98059, an ERK1/2 inhibitor, specifically inhibited its expression by insulin. However, the RANK expression by RANKL was blocked by all three mitogen-activated protein (MAP) kinases inhibitors. The activation of RANK increased differentiation of BMMs into tartrate-resistant acid phosphatase-positive (TRAP+) osteoclasts as well as the expression of dendritic cell-specific transmembrane protein (DC-STAMP) and d2 isoform of vacuolar (H+) ATPase (v-ATPase) Vo domain (Atp6v0d2), genes critical for osteoclastic cell-cell fusion. Collectively, these results suggest that insulin induces RANK expression via ERK1/2, which contributes to the enhancement of osteoclast differentiation.
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Affiliation(s)
- Ju Hee Oh
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan 31538,
Korea
| | - Na Kyung Lee
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan 31538,
Korea
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan 31538,
Korea
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14
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Fu H, Hou X, Wang L, Dun Y, Yang X, Fang H. Design, synthesis and biological evaluation of 3-aryl-rhodanine benzoic acids as anti-apoptotic protein Bcl-2 inhibitors. Bioorg Med Chem Lett 2015; 25:5265-9. [DOI: 10.1016/j.bmcl.2015.09.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/05/2015] [Accepted: 09/22/2015] [Indexed: 10/23/2022]
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15
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Oh JH, Lee JY, Joung SH, Oh YT, Kim HS, Lee NK. Insulin enhances RANKL-induced osteoclastogenesis via ERK1/2 activation and induction of NFATc1 and Atp6v0d2. Cell Signal 2015; 27:2325-31. [PMID: 26343857 DOI: 10.1016/j.cellsig.2015.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 08/21/2015] [Accepted: 09/02/2015] [Indexed: 10/23/2022]
Abstract
Insulin is one of the main factors affecting bone and energy metabolism, however, the direct effect of insulin on osteoclast differentiation remains unclear. Thus, in order to help elucidate that puzzle, the authors investigated the roles and regulatory mechanisms of insulin on osteoclasts differentiation. Co-stimulation with insulin and RANKL significantly enhanced the number of larger (>100 μm) osteoclastic cells and of TRAP-positive multinucleated cells compared with treatment by RANKL alone. Conversely, the insulin receptor shRNA markedly decreased osteoclast differentiation induced by insulin and RANKL. Insulin treatment significantly activated ERK1/2 MAP kinase as well as markedly induced the expression of NFATc1, an osteoclast marker gene, and Atp6v0d2, an osteoclast fusion-related gene. The pretreatment of PD98059, an ERK1/2 inhibitor, or insulin receptor shRNA effectively suppressed osteoclast differentiation and, in addition, blocked the expression of NFATc1 and Atp6vod2 induced by insulin stimulation. These data reveal insights into the regulation of osteoclast differentiation and fusion through ERK1/2 activation and the induction of NFATc1 and Atp6v0d2 by insulin.
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Affiliation(s)
- Ju Hee Oh
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea; Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea
| | - Jae Yoon Lee
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea
| | - Seung Hee Joung
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea
| | - Yoon Taek Oh
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea
| | - Hong Sung Kim
- Department of Biomedical Laboratory Science, Korea Nazarene University, Cheonan-Si, Chungnam 331-718, Republic of Korea
| | - Na Kyung Lee
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea; Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan-Si, Chungnam 336-745, Republic of Korea.
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