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Franceschi RT, Hallett SA, Ge C. Discoidin domain receptors; an ancient family of collagen receptors has major roles in bone development, regeneration and metabolism. FRONTIERS IN DENTAL MEDICINE 2023; 4:1181817. [PMID: 38222874 PMCID: PMC10785288 DOI: 10.3389/fdmed.2023.1181817] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024] Open
Abstract
The extracellular matrix (ECM) niche plays a critical role in determining cellular behavior during bone development including the differentiation and lineage allocation of skeletal progenitor cells to chondrocytes, osteoblasts, or marrow adipocytes. As the major ECM component in mineralized tissues, collagen has instructive as well as structural roles during bone development and is required for bone cell differentiation. Cells sense their extracellular environment using specific cell surface receptors. For many years, specific β1 integrins were considered the main collagen receptors in bone, but, more recently, the important role of a second, more primordial collagen receptor family, the discoidin domain receptors, has become apparent. This review will specifically focus on the roles of discoidin domain receptors in mineralized tissue development as well as related functions in abnormal bone formation, regeneration and metabolism.
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Affiliation(s)
- Renny T. Franceschi
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, United States
| | - Shawn A. Hallett
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, United States
| | - Chunxi Ge
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, United States
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Zhu YS, Zhang JN, Mo TT, Jiang C, Ma RC, Chen L. Discoidin domain receptor 2 activation of p38 mitogen-activated protein kinase as an important pathway for osteonectin-regulating osteoblast mineralization. J Orthop Surg Res 2021; 16:711. [PMID: 34876214 PMCID: PMC8650413 DOI: 10.1186/s13018-021-02860-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 11/24/2021] [Indexed: 11/24/2022] Open
Abstract
Objective The present study aimed to determine the role of the discoidin domain receptor 2 (DDR2) in the osteonectin (ON) regulation of osteoblast mineralization through the activation of p38 mitogen-activated protein kinase (MAPK). Methods Four groups were established: the ON group, the inhibitor group, the Ddr2-small interfering ribonucleic acid (siRNA) group, and the control group. Osteoblasts from the parietal bones of neonatal Sprague–Dawley rats were isolated and cultured. In the ON group, 1 µg/mL ON was added to the osteoblasts. The gene expressions of collagen 1 (Col 1) and Ddr2 were detected using reverse transcription-quantitative polymerase chain reaction (RT-qPCR). In the inhibitor group, the osteoblasts were added to WRG-28 (a specific DDR2 inhibitor), and in the Ddr2-siRNA group, the osteoblasts were transfected with Ddr2-siRNA. The gene and protein expressions of DDR2, bone sialoprotein, osteocalcin, osteopontin, and p38 MAPK were determined using RT-qPCR and western blot analysis. Alizarin red staining and transmission electron microscopy were used to detect mineralization. Results The results showed that ON enhanced the osteoblast Col 1 and Ddr2 gene expressions, while the use of a Ddr2-siRNA/DDR2-blocker decreased the OPN, BSP, OCN, and P38 gene and protein expressions and reduced osteoblast cellular activity and mineralized nodules. Conclusion The present study demonstrated that DDR2 activation of p38 MAPK is an important approach to ON-regulating osteoblast mineralization.
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Affiliation(s)
- Yun-Sen Zhu
- Department of Orthopaedic Surgery, The First People's Hospital of Wenling, Chuan'an Nan Road NO 333, Wenling, 317500, Zhejiang, China
| | - Jiang-Nan Zhang
- Department of Orthopaedic Surgery, The First People's Hospital of Wenling, Chuan'an Nan Road NO 333, Wenling, 317500, Zhejiang, China
| | - Ting-Ting Mo
- Department of Orthopaedic Surgery, The First People's Hospital of Wenling, Chuan'an Nan Road NO 333, Wenling, 317500, Zhejiang, China
| | - Chang Jiang
- Department of Orthopaedic Surgery, The First People's Hospital of Wenling, Chuan'an Nan Road NO 333, Wenling, 317500, Zhejiang, China.
| | - Ru-Chao Ma
- Department of Orthopaedic Surgery, The First People's Hospital of Wenling, Chuan'an Nan Road NO 333, Wenling, 317500, Zhejiang, China
| | - Liang Chen
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215000, Jiangsu, China
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Franceschi RT, Ge C. Control of the Osteoblast Lineage by Mitogen-Activated Protein Kinase Signaling. ACTA ACUST UNITED AC 2017; 3:122-132. [PMID: 29057206 DOI: 10.1007/s40610-017-0059-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
PURPOSE OF THE REVIEW This review will provide a timely assessment of MAP kinase actions in bone development and homeostasis with particular emphasis on transcriptional control of the osteoblast lineage. RECENT FINDINGS ERK and p38 MAP kinases function as transducers of signals initiated by the extracellular matrix, mechanical loading, TGF-β, BMPs and FGF2. MAPK signals may also affect and/or interact with other important pathways such as WNT and HIPPO. ERK and p38 MAP kinase pathways phosphorylate specific osteogenic transcription factors including RUNX2, Osterix, ATF4 and DLX5. For RUNX2, phosphorylation at specific serine residues initiates epigenetic changes in chromatin necessary for decondensation and increased transcription. MAPK also suppresses marrow adipogenesis by phosphorylating and inhibiting PPARγ, which may explain the well-known relationship between reduced skeletal loading and marrow fat accumulation. SUMMARY MAPKs transduce signals from the extracellular environment to the nucleus allowing bone cells to respond to changes in hormonal/growth factor signaling and mechanical loading thereby optimizing bone structure to meet physiological and mechanical needs of the body.
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Affiliation(s)
- Renny T Franceschi
- Departments of Periodontics and Oral Medicine, University of Michigan School of Dentistry and Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI 48109-1078
| | - Chunxi Ge
- Departments of Periodontics and Oral Medicine, University of Michigan School of Dentistry and Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI 48109-1078
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Zhu DL, Guo Y, Zhang Y, Dong SS, Xu W, Hao RH, Chen XF, Yan H, Yang SY, Yang TL. A functional SNP regulated by miR-196a-3p in the 3′UTR ofFGF2is associated with bone mineral density in the Chinese population. Hum Mutat 2017; 38:725-735. [DOI: 10.1002/humu.23216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 12/24/2022]
Affiliation(s)
- Dong-Li Zhu
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Yan Guo
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Yan Zhang
- Center for Translational Medicine; Xi'an Jiaotong University College of Medicine; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Shan-Shan Dong
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Wen Xu
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Ruo-Han Hao
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Xiao-Feng Chen
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Han Yan
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Shui-Yun Yang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
| | - Tie-Lin Yang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an People's Republic of China
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Ge C, Wang Z, Zhao G, Li B, Liao J, Sun H, Franceschi RT. Discoidin Receptor 2 Controls Bone Formation and Marrow Adipogenesis. J Bone Miner Res 2016; 31:2193-2203. [PMID: 27341689 PMCID: PMC5135576 DOI: 10.1002/jbmr.2893] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 06/16/2016] [Accepted: 06/22/2016] [Indexed: 01/09/2023]
Abstract
Cell-extracellular matrix (ECM) interactions play major roles in controlling progenitor cell fate and differentiation. The receptor tyrosine kinase, discoidin domain receptor 2 (DDR2), is an important mediator of interactions between cells and fibrillar collagens. DDR2 signals through both ERK1/2 and p38 MAP kinase, which stimulate osteoblast differentiation and bone formation. Here we show that DDR2 is critical for skeletal development and differentiation of marrow progenitor cells to osteoblasts while suppressing marrow adipogenesis. Smallie mice (Ddr2slie/slie ), which contain a nonfunctional Ddr2 allele, have multiple skeletal defects. A progressive decrease in tibial trabecular bone volume/total volume (BV/TV) was observed when wild-type (WT), Ddr2wt/slie , and Ddr2slie/slie mice were compared. These changes were associated with reduced trabecular number (Tb.N) and trabecular thickness (Tb.Th) and increased trabecular spacing (Tb.Sp) in both males and females, but reduced cortical thickness only in Ddr2slie/slie females. Bone changes were attributed to decreased bone formation rather than increased osteoclast activity. Significantly, marrow fat and adipocyte-specific mRNA expression were significantly elevated in Ddr2slie/slie animals. Additional skeletal defects include widened calvarial sutures and reduced vertebral trabecular bone. To examine the role of DDR2 signaling in cell differentiation, bone marrow stromal cells (BMSCs) were grown under osteogenic and adipogenic conditions. Ddr2slie/slie cells exhibited defective osteoblast differentiation and accelerated adipogenesis. Changes in differentiation were related to activity of runt-related transcription factor 2 (RUNX2) and PPARγ, transcription factors that are both controlled by MAPK-dependent phosphorylation. Specifically, the defective osteoblast differentiation in calvarial cells from Ddr2slie/slie mice was associated with reduced ERK/MAP kinase and RUNX2-S319 phosphorylation and could be rescued with a constitutively active phosphomimetic RUNX2 mutant. Also, DDR2 was shown to increase RUNX2-S319 phosphorylation and transcriptional activity while also increasing PPARγ-S112 phosphorylation, but reducing its activity. DDR2 is, therefore, important for maintenance of osteoblast activity and suppression of marrow adipogenesis in vivo and these actions are related to changes in MAPK-dependent RUNX2 and PPARγ phosphorylation. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Chunxi Ge
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
| | - Zhengyan Wang
- Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
| | - Guisheng Zhao
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
| | - Binbin Li
- Department of Oral Pathology, Peking University School of Stomatology, Beijing 10081, P.R.China
| | - Jinhui Liao
- Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
| | - Hanshi Sun
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
| | - Renny T. Franceschi
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078
- Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI 48109-0600
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Zhang Y, Su J, Wu S, Teng Y, Yin Z, Guo Y, Li J, Li K, Yao L, Li X. DDR2 (discoidin domain receptor 2) suppresses osteoclastogenesis and is a potential therapeutic target in osteoporosis. Sci Signal 2015; 8:ra31. [PMID: 25805889 DOI: 10.1126/scisignal.2005835] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Osteoporosis is a disease characterized by abnormal skeletal fragility due to an imbalance in bone homeostasis. Finding therapeutic targets that promote bone formation is valuable for treating osteoporosis. Discoidin domain receptor 2 (DDR2) is a receptor tyrosine kinase that promotes the differentiation of bone-depositing cells, osteoblasts, and bone formation. We investigated the role of DDR2 in osteoclastogenesis, the formation of cells responsible for bone resorption. We found that, although differentiated osteoclasts had catalytically active DDR2, its abundance was decreased. Overexpression of DDR2 inhibited the expression of osteoclastic markers, osteoclast maturation, and osteoclast-mediated bone resorption in a culture model of bone matrix. Conversely, knocking down Ddr2 through RNA interference accelerated osteoclast differentiation and bone resorption in mice. Further, we identified the co-receptor Neuropilin-1 (Nrp1) as a DDR2-interacting protein. DDR2 facilitated the binding of Nrp1 and the co-receptor PlexinA1 by forming a DDR2-Nrp1-PlexinA1 complex, which blocked PlexinA1-mediated stimulation of osteoclastogenesis. DDR2 prevented PlexinA1 from interacting with the receptor TREM2 and the adaptor DAP12. Moreover, knocking down Nrp1 rescued the expression of osteoclastic markers observed in DDR2-overexpressing cells, whereas ectopic expression of Nrp1 in DDR2-silenced cells inhibited the induction of osteoclastogenesis. Nrp1 enhanced the function of DDR2 in promoting osteoblast differentiation and bone formation in mice. In an ovariectomized mouse model of osteoporosis, adenovirus-mediated delivery of DDR2 to the femur bone alleviated osteopenic phenotypes. Our results revealed that DDR2 functions as an inhibitor of osteoclastogenesis, as well as a promoter of osteoblastogenesis, suggesting that enhancing DDR2 may be therapeutic for patients with osteoporosis.
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Affiliation(s)
- Yan Zhang
- Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Jin Su
- Department of Biochemistry and Molecular Biology, the Fourth Military Medical University, Xi'an, Shaanxi 710032, People's Republic of China
| | - Shufang Wu
- Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Yue Teng
- Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Zhanhai Yin
- Department of Orthopaedics, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Yan Guo
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
| | - Jing Li
- Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Kun Li
- Clinical laboratory, ShanXi Mineral Hospital, Xi'an, Shaanxi 710014, People's Republic of China
| | - Libo Yao
- Department of Biochemistry and Molecular Biology, the Fourth Military Medical University, Xi'an, Shaanxi 710032, People's Republic of China
| | - Xu Li
- Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, People's Republic of China.
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