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Lu H, Wei J, Liu K, Li Z, Xu T, Yang D, Gao Q, Xiang H, Li G, Chen Y. Radical-Scavenging and Subchondral Bone-Regenerating Nanomedicine for Osteoarthritis Treatment. ACS NANO 2023; 17:6131-6146. [PMID: 36920036 DOI: 10.1021/acsnano.3c01789] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Osteoarthritis (OA) is characterized by cartilage degradation and subchondral bone remodeling. However, most available studies focus on either cartilage degradation or subchondral bone lesion, alone, and rarely pay attention to the synergy of these two pathological changes. Herein, a dual-functional medication is developed to simultaneously protect cartilage and achieve subchondral bone repair. Black phosphorus nanosheets (BPNSs), with a strong reactive oxygen species (ROS)-scavenging capability and high biocompatibility, also present a notable promoting effect in osteogenesis. BPNSs efficiently eliminate the intracellular ROS and, thus, protect the inherent homeostasis between cartilage matrix anabolism and catabolism. RNA sequencing results of BPNSs-treated OA chondrocytes further reveal the restoration of chondrocyte function, activation of antioxidant enzymes, and regulation of inflammation. Additional in vivo assessments solidly confirm that BPNSs inhibit cartilage degradation and prevent OA progression. Meanwhile, histological evaluation and microcomputed tomography (micro-CT) scanning analysis verify the satisfying disease-modifying effects of BPNSs on OA. Additionally, the excellent biocompatibility of BPNSs enables them as a competitive candidate for OA treatment. This distinct disease-modifying treatment of OA on the basis of BPNSs provides an insight and paradigm on the dual-functional treatment strategy focusing on both cartilage degradation and subchondral bone lesion in OA and explores a broader biomedical application of BPNS nanomedicine in orthopedics.
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Affiliation(s)
- Hengli Lu
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Jihu Wei
- Department of Orthopaedics, Bengbu First People's Hospital, Bengbu, Anhui 233000, P. R. China
| | - Kaiyuan Liu
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Zihua Li
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Tianyang Xu
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Dong Yang
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Qiuming Gao
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Huijing Xiang
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Guodong Li
- Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200092, P. R. China
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
- Wenzhou Institute of Shanghai University, Wenzhou, 325000, P. R. China
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Bernabei I, So A, Busso N, Nasi S. Cartilage calcification in osteoarthritis: mechanisms and clinical relevance. Nat Rev Rheumatol 2023; 19:10-27. [PMID: 36509917 DOI: 10.1038/s41584-022-00875-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2022] [Indexed: 12/14/2022]
Abstract
Pathological calcification of cartilage is a hallmark of osteoarthritis (OA). Calcification can be observed both at the cartilage surface and in its deeper layers. The formation of calcium-containing crystals, typically basic calcium phosphate (BCP) and calcium pyrophosphate dihydrate (CPP) crystals, is an active, highly regulated and complex biological process that is initiated by chondrocytes and modified by genetic factors, dysregulated mitophagy or apoptosis, inflammation and the activation of specific cellular-signalling pathways. The links between OA and BCP deposition are stronger than those observed between OA and CPP deposition. Here, we review the molecular processes involved in cartilage calcification in OA and summarize the effects of calcium crystals on chondrocytes, synovial fibroblasts, macrophages and bone cells. Finally, we highlight therapeutic pathways leading to decreased joint calcification and potential new drugs that could treat not only OA but also other diseases associated with pathological calcification.
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Affiliation(s)
- Ilaria Bernabei
- Service of Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Alexander So
- Service of Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland.
| | - Nathalie Busso
- Service of Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Sonia Nasi
- Service of Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
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He Y, Wang W, Luo P, Wang Y, He Z, Dong W, Jia M, Yu X, Yang B, Wang J. Mettl3 regulates hypertrophic differentiation of chondrocytes through modulating Dmp1 mRNA via Ythdf1-mediated m 6A modification. Bone 2022; 164:116522. [PMID: 35981698 DOI: 10.1016/j.bone.2022.116522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/02/2022] [Accepted: 08/12/2022] [Indexed: 11/02/2022]
Abstract
As the main cells in endochondral osteogenesis, chondrocytes have limited self-repair ability due to weak proliferation activity, low density, and dedifferentiation tendency. Here, a thorough inquiry about the effect and underlying mechanisms of methyltransferase like-3 (Mettl3) on chondrocytes was made. Functionally, it was indicated that Mettl3 promoted the proliferation and hypertrophic differentiation of chondrocytes. Mechanically, Dmp1 (dentin matrix protein 1) was proved to be the downstream direct target of Mettl3 for m6A modification to regulate the differentiation of chondrocytes through bioinformatics analysis and correlated experiments. The Reader protein Ythdf1 mediated Dmp1 mRNA catalyzed by Mettl3. In vivo, the formation of subcutaneous ectopic cartilage-like tissue further supported the in vitro results. In conclusion, the gene regulation of Mettl3/m6A/Ythdf1/Dmp1 axis in hypertrophic differentiation of chondrocytes for the development of endochondral osteogenesis may supply a promising treatment strategy for the repair and regeneration of bone defects.
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Affiliation(s)
- Ying He
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Wei Wang
- Department of Hepatobiliary Surgery in East Hospital, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ping Luo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Yan Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Zhenru He
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Wei Dong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Meie Jia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Xijie Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Beining Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Jiawei Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School &Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China.
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4
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Li MCM, Chow SKH, Wong RMY, Chen B, Cheng JCY, Qin L, Cheung WH. Osteocyte-specific dentin matrix protein 1 : the role of mineralization regulation in low-magnitude high-frequency vibration enhanced osteoporotic fracture healing. Bone Joint Res 2022; 11:465-476. [PMID: 35787000 PMCID: PMC9350691 DOI: 10.1302/2046-3758.117.bjr-2021-0476.r2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Aims There is an increasing concern of osteoporotic fractures in the ageing population. Low-magnitude high-frequency vibration (LMHFV) was shown to significantly enhance osteoporotic fracture healing through alteration of osteocyte lacuno-canalicular network (LCN). Dentin matrix protein 1 (DMP1) in osteocytes is known to be responsible for maintaining the LCN and mineralization. This study aimed to investigate the role of osteocyte-specific DMP1 during osteoporotic fracture healing augmented by LMHFV. Methods A metaphyseal fracture was created in the distal femur of ovariectomy-induced osteoporotic Sprague Dawley rats. Rats were randomized to five different groups: 1) DMP1 knockdown (KD), 2) DMP1 KD + vibration (VT), 3) Scramble + VT, 4) VT, and 5) control (CT), where KD was performed by injection of short hairpin RNA (shRNA) into marrow cavity; vibration treatment was conducted at 35 Hz, 0.3 g; 20 minutes/day, five days/week). Assessments included radiography, micro-CT, dynamic histomorphometry and immunohistochemistry on DMP1, sclerostin, E11, and fibroblast growth factor 23 (FGF23). In vitro, murine long bone osteocyte-Y4 (MLO-Y4) osteocyte-like cells were randomized as in vivo groupings. DMP1 KD was performed by transfecting cells with shRNA plasmid. Assessments included immunocytochemistry on osteocyte-specific markers as above, and mineralized nodule staining. Results Healing capacities in DMP1 KD groups were impaired. Results showed that DMP1 KD significantly abolished vibration-enhanced fracture healing at week 6. DMP1 KD significantly altered the expression of osteocyte-specific markers. The lower mineralization rate in DMP1 KD groups indicated that DMP1 knockdown was associated with poor fracture healing process. Conclusion The blockage of DMP1 would impair healing outcomes and negate LMHFV-induced enhancement on fracture healing. These findings reveal the importance of DMP1 in response to the mechanical signal during osteoporotic fracture healing. Cite this article: Bone Joint Res 2022;11(7):465–476.
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Affiliation(s)
- Meng C M Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Simon K-H Chow
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ronald M Y Wong
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Bailing Chen
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jack C Y Cheng
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ling Qin
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Wing-Hoi Cheung
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
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5
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The Emerging Role of Cell Transdifferentiation in Skeletal Development and Diseases. Int J Mol Sci 2022; 23:ijms23115974. [PMID: 35682655 PMCID: PMC9180549 DOI: 10.3390/ijms23115974] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
The vertebrate musculoskeletal system is known to be formed by mesenchymal stem cells condensing into tissue elements, which then differentiate into cartilage, bone, tendon/ligament, and muscle cells. These lineage-committed cells mature into end-stage differentiated cells, like hypertrophic chondrocytes and osteocytes, which are expected to expire and to be replaced by newly differentiated cells arising from the same lineage pathway. However, there is emerging evidence of the role of cell transdifferentiation in bone development and disease. Although the concept of cell transdifferentiation is not new, a breakthrough in cell lineage tracing allowed scientists to trace cell fates in vivo. Using this powerful tool, new theories have been established: (1) hypertrophic chondrocytes can transdifferentiate into bone cells during endochondral bone formation, fracture repair, and some bone diseases, and (2) tendon cells, beyond their conventional role in joint movement, directly participate in normal bone and cartilage formation, and ectopic ossification. The goal of this review is to obtain a better understanding of the key roles of cell transdifferentiation in skeletal development and diseases. We will first review the transdifferentiation of chondrocytes to bone cells during endochondral bone formation. Specifically, we will include the history of the debate on the fate of chondrocytes during bone formation, the key findings obtained in recent years on the critical factors and molecules that regulate this cell fate change, and the role of chondrocyte transdifferentiation in skeletal trauma and diseases. In addition, we will also summarize the latest discoveries on the novel roles of tendon cells and adipocytes on skeletal formation and diseases.
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6
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Wang ZX, Luo ZW, Li FXZ, Cao J, Rao SS, Liu YW, Wang YY, Zhu GQ, Gong JS, Zou JT, Wang Q, Tan YJ, Zhang Y, Hu Y, Li YY, Yin H, Wang XK, He ZH, Ren L, Liu ZZ, Hu XK, Yuan LQ, Xu R, Chen CY, Xie H. Aged bone matrix-derived extracellular vesicles as a messenger for calcification paradox. Nat Commun 2022; 13:1453. [PMID: 35304471 PMCID: PMC8933454 DOI: 10.1038/s41467-022-29191-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 02/25/2022] [Indexed: 02/06/2023] Open
Abstract
Adipocyte differentiation of bone marrow mesenchymal stem/stromal cells (BMSCs) instead of osteoblast formation contributes to age- and menopause-related marrow adiposity and osteoporosis. Vascular calcification often occurs with osteoporosis, a contradictory association called “calcification paradox”. Here we show that extracellular vesicles derived from aged bone matrix (AB-EVs) during bone resorption favor BMSC adipogenesis rather than osteogenesis and augment calcification of vascular smooth muscle cells. Intravenous or intramedullary injection of AB-EVs promotes bone-fat imbalance and exacerbates Vitamin D3 (VD3)-induced vascular calcification in young or old mice. Alendronate (ALE), a bone resorption inhibitor, down-regulates AB-EVs release and attenuates aging- and ovariectomy-induced bone-fat imbalance. In the VD3-treated aged mice, ALE suppresses the ovariectomy-induced aggravation of vascular calcification. MiR-483-5p and miR-2861 are enriched in AB-EVs and essential for the AB-EVs-induced bone-fat imbalance and exacerbation of vascular calcification. Our study uncovers the role of AB-EVs as a messenger for calcification paradox by transferring miR-483-5p and miR-2861. This study uncovers the role of extracellular vesicles from bone matrix as a messenger in the development of osteoporosis and vascular calcification (calcification paradox) during skeletal aging and menopause by transferring miR-483-5p and miR-2861.
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Affiliation(s)
- Zhen-Xing Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhong-Wei Luo
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fu-Xing-Zi Li
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jia Cao
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shan-Shan Rao
- Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Xiangya Nursing School, Central South University, Changsha, Hunan, China
| | - Yi-Wei Liu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yi-Yi Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Guo-Qiang Zhu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jiang-Shan Gong
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jing-Tao Zou
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiang Wang
- Department of Laboratory Medicine, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yi-Juan Tan
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yan Zhang
- Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yin Hu
- Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - You-You Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hao Yin
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiao-Kai Wang
- Department of Emergency Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ze-Hui He
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lu Ren
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zheng-Zhao Liu
- Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Department of Sports Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Hunan Key Laboratory of Organ Injury, Aging and Regenerative Medicine, Changsha, Hunan, China.,Hunan Key Laboratory of Bone Joint Degeneration and Injury, Changsha, Hunan, China
| | - Xiong-Ke Hu
- Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ling-Qing Yuan
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ran Xu
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chun-Yuan Chen
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - Hui Xie
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,Movement System Injury and Repair Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,Department of Sports Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,Hunan Key Laboratory of Organ Injury, Aging and Regenerative Medicine, Changsha, Hunan, China. .,Hunan Key Laboratory of Bone Joint Degeneration and Injury, Changsha, Hunan, China.
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Abstract
Understanding the properties of bone is of both fundamental and clinical relevance. The basis of bone’s quality and mechanical resilience lies in its nanoscale building blocks (i.e., mineral, collagen, non-collagenous proteins, and water) and their complex interactions across length scales. Although the structure–mechanical property relationship in healthy bone tissue is relatively well characterized, not much is known about the molecular-level origin of impaired mechanics and higher fracture risks in skeletal disorders such as osteoporosis or Paget’s disease. Alterations in the ultrastructure, chemistry, and nano-/micromechanics of bone tissue in such a diverse group of diseased states have only been briefly explored. Recent research is uncovering the effects of several non-collagenous bone matrix proteins, whose deficiencies or mutations are, to some extent, implicated in bone diseases, on bone matrix quality and mechanics. Herein, we review existing studies on ultrastructural imaging—with a focus on electron microscopy—and chemical, mechanical analysis of pathological bone tissues. The nanometric details offered by these reports, from studying knockout mice models to characterizing exact disease phenotypes, can provide key insights into various bone pathologies and facilitate the development of new treatments.
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8
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Osteocyte Dysfunction in Joint Homeostasis and Osteoarthritis. Int J Mol Sci 2021; 22:ijms22126522. [PMID: 34204587 PMCID: PMC8233862 DOI: 10.3390/ijms22126522] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 01/29/2023] Open
Abstract
Structural disturbances of the subchondral bone are a hallmark of osteoarthritis (OA), including sclerotic changes, cystic lesions, and osteophyte formation. Osteocytes act as mechanosensory units for the micro-cracks in response to mechanical loading. Once stimulated, osteocytes initiate the reparative process by recruiting bone-resorbing cells and bone-forming cells to maintain bone homeostasis. Osteocyte-expressed sclerostin is known as a negative regulator of bone formation through Wnt signaling and the RANKL pathway. In this review, we will summarize current understandings of osteocytes at the crossroad of allometry and mechanobiology to exploit the relationship between osteocyte morphology and function in the context of joint aging and osteoarthritis. We also aimed to summarize the osteocyte dysfunction and its link with structural and functional disturbances of the osteoarthritic subchondral bone at the molecular level. Compared with normal bones, the osteoarthritic subchondral bone is characterized by a higher bone volume fraction, a larger trabecular bone number in the load-bearing region, and an increase in thickness of pre-existing trabeculae. This may relate to the aberrant expressions of sclerostin, periostin, dentin matrix protein 1, matrix extracellular phosphoglycoprotein, insulin-like growth factor 1, and transforming growth factor-beta, among others. The number of osteocyte lacunae embedded in OA bone is also significantly higher, yet the volume of individual lacuna is relatively smaller, which could suggest abnormal metabolism in association with allometry. The remarkably lower percentage of sclerostin-positive osteocytes, together with clustering of Runx-2 positive pre-osteoblasts, may suggest altered regulation of osteoblast differentiation and osteoblast-osteocyte transformation affected by both signaling molecules and the extracellular matrix. Aberrant osteocyte morphology and function, along with anomalies in molecular signaling mechanisms, might explain in part, if not all, the pre-osteoblast clustering and the uncoupled bone remodeling in OA subchondral bone.
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9
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Ultra-processed food targets bone quality via endochondral ossification. Bone Res 2021; 9:14. [PMID: 33637698 PMCID: PMC7910299 DOI: 10.1038/s41413-020-00127-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/11/2020] [Accepted: 11/01/2020] [Indexed: 01/31/2023] Open
Abstract
Ultra-processed foods have known negative implications for health; however, their effect on skeletal development has never been explored. Here, we show that young rats fed ultra-processed food rich in fat and sugar suffer from growth retardation due to lesions in their tibial growth plates. The bone mineral density decreases significantly, and the structural parameters of the bone deteriorate, presenting a sieve-like appearance in the cortices and poor trabecular parameters in long bones and vertebrae. This results in inferior mechanical performance of the entire bone with a high fracture risk. RNA sequence analysis of the growth plates demonstrated an imbalance in extracellular matrix formation and degradation and impairment of proliferation, differentiation and mineralization processes. Our findings highlight, for the first time, the severe impact of consuming ultra-processed foods on the growing skeleton. This pathology extends far beyond that explained by the known metabolic effects, highlighting bone as a new target for studies of modern diets.
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10
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Zhang H, Li L, Kesterke MJ, Lu Y, Qin C. High-Phosphate Diet Improved the Skeletal Development of Fam20c-Deficient Mice. Cells Tissues Organs 2020; 208:25-36. [PMID: 32101876 DOI: 10.1159/000506005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/19/2020] [Indexed: 12/29/2022] Open
Abstract
FAM20C (family with sequence similarity 20 - member C) is a protein kinase that phosphorylates secretory proteins, including the proteins that are essential to the formation and mineralization of calcified tissues. Previously, we reported that inactivation of Fam20c in mice led to hypophosphatemic rickets/osteomalacia along with increased circulating fibroblast growth factor 23 (FGF23) levels and dental defects. In this study, we examined whether a high-phosphate (hPi) diet could rescue the skeletal defects in Fam20c-deficient mice. Fam20c conditional knockout (cKO) mice were generated by crossing female Fam20c-floxed mice (Fam20cfl/fl) with male Sox2-Cre;Fam20cfl/+ mice. The pregnant female Fam20cfi/fl mice were fed either a normal or hPi diet until the litters were weaned. The cKO and control offspring were continuously given a normal or hPi diet for 4 weeks after weaning. Plain X-ray radiography, micro-CT, histology, immunohistochemistry (FGF23, DMP1, OPN, and SOX9), and in situ hybridization (type II and type X collagen) analyses were performed to evaluate the effects of an hPi diet on the mouse skeleton. Plain X-ray radiography and micro-CT radiography analyses showed that the hPi diet improved the shape and mineral density of the Fam20c-deficient femurs/tibiae, and rescued the growth plate defects in the long bone. Histology analyses further demonstrated that an hPi diet nearly completely rescued the growth plate-widening defects in the long bone and restored the expanded hypertrophic zone to nearly normal width. These results suggested that the hPi diet significantly improved the skeletal development of the Fam20c-deficient mice, implying that hypophosphatemia partially contributed to the skeletal defects in Fam20c-deficient subjects.
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Affiliation(s)
- Hua Zhang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas, USA,
| | - Lili Li
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas, USA
| | - Matthew J Kesterke
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas, USA
| | - Yongbo Lu
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas, USA
| | - Chunlin Qin
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas, USA
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11
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Li H, Jing Y, Zhang R, Zhang Q, Wang J, Martin A, Feng JQ. Hypophosphatemic rickets accelerate chondrogenesis and cell trans-differentiation from TMJ chondrocytes into bone cells via a sharp increase in β-catenin. Bone 2020; 131:115151. [PMID: 31751752 PMCID: PMC6930687 DOI: 10.1016/j.bone.2019.115151] [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: 09/11/2019] [Revised: 11/06/2019] [Accepted: 11/08/2019] [Indexed: 02/05/2023]
Abstract
Dentin matrix protein 1 (DMP1) is primarily expressed in osteocytes, although a low level of DMP1 is also detected in chondrocytes. Removing Dmp1 in mice or a mutation in humans leads to hypophosphatemic rickets (identical to X-linked hypophosphatemia). The deformed skeletons were currently thought to be a consequence of an inhibition of chondrogenesis (leading to an accumulation of hypertrophic chondrocytes and a failure in the replacement of cartilage by bone). To precisely study the mechanisms by which DMP1 and phosphorus control temporomandibular condyle formation, we first showed severe malformed condylar phenotypes in Dmp1-null mice (great expansions of deformed cartilage layers and subchondral bone), which worst as aging. Next, we excluded the direct role of DMP1 in condylar hypertrophic-chondrogenesis by conditionally deleting Dmp1 in hypertrophic chondrocytes using Col10a1-Cre and Dmp1 loxP mice (displaying no apparent phosphorous changes and condylar phenotype). To address the mechanism by which the onset of endochondral phenotypes takes place, we generated two sets of tracing lines in the Dmp1 KO background: AggrecanCreERT2-ROSA-tdTomato and Col 10a1-Cre-ROSA-tdTomato, respectively. Both tracing lines displayed an acceleration of chondrogenesis and cell trans-differentiation from chondrocytes into bone cells in the Dmp1 KO. Next, we showed that administrations of neutralizing fibroblast growth factor 23 (FGF23) antibodies in Dmp1-null mice restored hypophosphatemic condylar cartilage phenotypes. In further addressing the rescue mechanism, we generated compound mice containing Col10a1-Cre with ROSA-tdTomato and Dmp1 KO lines with and without a high Pi diet starting at day 10 for 39 days. We demonstrated that hypophosphatemia leads to an acceleration of chondrogenesis and trans-differentiation of chondrocytes to bone cells, which were largely restored under a high Pi diet. Finally, we identified the causative molecule (β-catenin). Together, this study demonstrates that the Dmp1-null caused hypophosphatemia, leading to acceleration (instead of inhibition) of chondrogenesis and bone trans-differentiation from chondrocytes but inhibition of bone cell maturation due to a sharp increase in β-catenin. These findings will aid in the future treatment of hypophosphatemic rickets with FGF23 neutralizing antibodies.
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Affiliation(s)
- Hui Li
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX 75246, USA; State Key Laboratory of Oral Diseases, Department of Traumatic and Plastic Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yan Jing
- Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, TX 75246, USA
| | - Rong Zhang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX 75246, USA; Faculty of Medicine, Northwest University, #229 Taibai North Rd, Xi'an, Shaanxi, 710069, China
| | - Qi Zhang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX 75246, USA; Laboratory of Oral Biomedical Science and Translational Medicine, Department of Endodontics, School of Stomatology, Tongji University, Shanghai, China
| | - Jun Wang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX 75246, USA; State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Aline Martin
- Center for Translational Metabolism and Health, Division of Nephrology/Hypertension, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Jian Q Feng
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX 75246, USA.
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12
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Liu Z, Easson GWD, Zhao J, Makki N, Ahituv N, Hilton MJ, Tang SY, Gray RS. Dysregulation of STAT3 signaling is associated with endplate-oriented herniations of the intervertebral disc in Adgrg6 mutant mice. PLoS Genet 2019; 15:e1008096. [PMID: 31652254 PMCID: PMC6834287 DOI: 10.1371/journal.pgen.1008096] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 11/06/2019] [Accepted: 09/18/2019] [Indexed: 12/01/2022] Open
Abstract
Degenerative changes of the intervertebral disc (IVD) are a leading cause of disability affecting humans worldwide and has been attributed primarily to trauma and the accumulation of pathology during aging. While genetic defects have also been associated with disc degeneration, the precise mechanisms driving the initiation and progression of disease have remained elusive due to a paucity of genetic animal models. Here, we discuss a novel conditional mouse genetic model of endplate-oriented disc herniations in adult mice. Using conditional mouse genetics, we show increased mechanical stiffness and reveal dysregulation of typical gene expression profiles of the IVD in adhesion G-protein coupled receptor G6 (Adgrg6) mutant mice prior to the onset of endplate-oriented disc herniations in adult mice. We observed increased STAT3 activation prior to IVD defects and go on to demonstrate that treatment of Adgrg6 conditional mutant mice with a small molecule inhibitor of STAT3 activation ameliorates endplate-oriented herniations. These findings establish ADGRG6 and STAT3 as novel regulators of IVD endplate and growth plate integrity in the mouse, and implicate ADGRG6/STAT3 signaling as promising therapeutic targets for endplate-oriented disc degeneration. Back pain is a leading cause of disability in humans worldwide and one of the most common culprits of these issues are the consequence of degenerative changes of the intervertebral disc. Here, we demonstrate that conditional loss of the Adgrg6 gene in cartilaginous tissues of the spine results in endplate-oriented disc herniations and degenerative changes of the intervertebral disc in mice. We further establish that these obvious degenerative changes of the disc are preceded by substantial alterations in normal gene expression profiles, including upregulation of pro-inflammatory STAT3 signaling, and increased mechanical stiffness of the intervertebral disc. Increased STAT3 activation is a signal observed in other models of degenerative musculoskeletal tissues. As such, we tested whether systemic treatment with a small-molecule STAT3 inhibitor would protect against the formation of endplate-oriented disc herniations in conditional Adgrg6 mutant mice, and report a significant positive improvement of histopathology in our treatment group. Taken together, we demonstrate a novel conditional model of endplate-oriented disc herniation in mouse. We establish ADGRG6 and STAT3 as novel regulators of endplate integrity of the intervertebral disc in mouse and suggest that modulation of ADGRG6/STAT3 signaling could provide robust disease-modifying targets for endplate-oriented disc degeneration in humans.
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Affiliation(s)
- Zhaoyang Liu
- Department of Nutritional Sciences, University of Texas at Austin, Austin, Texas, United States of America
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, Texas, United States of America
| | - Garrett W. D. Easson
- Department of Orthopedics, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Jingjing Zhao
- Department of Bioengineering and Therapeutic Sciences and Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
| | - Nadja Makki
- Department of Bioengineering and Therapeutic Sciences and Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
- Department of Anatomy and Cell Biology, University of Florida, College of Medicine, Gainesville, Florida, United States of America
| | - Nadav Ahituv
- Department of Bioengineering and Therapeutic Sciences and Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
| | - Matthew J. Hilton
- Department of Orthopedic Surgery and Cell Biology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Simon Y. Tang
- Department of Orthopedics, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Ryan S. Gray
- Department of Nutritional Sciences, University of Texas at Austin, Austin, Texas, United States of America
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, Texas, United States of America
- * E-mail:
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13
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Liu T, Wang J, Xie X, Wang K, Sui T, Liu D, Lai L, Zhao H, Li Z, Feng JQ. DMP1 Ablation in the Rabbit Results in Mineralization Defects and Abnormalities in Haversian Canal/Osteon Microarchitecture. J Bone Miner Res 2019; 34:1115-1128. [PMID: 30827034 DOI: 10.1002/jbmr.3683] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 01/11/2019] [Accepted: 01/19/2019] [Indexed: 02/05/2023]
Abstract
DMP1 (dentin matrix protein 1) is an extracellular matrix protein highly expressed in bones. Studies of Dmp1 knockout (KO) mice led to the discovery of a rare autosomal recessive form of hypophosphatemic rickets (ARHR) caused by DMP1 mutations. However, there are limitations for using this mouse model to study ARHR, including a lack of Haversian canals and osteons (that occurs only in large mammalian bones), high levels of fibroblast growth factor 23 (FGF23), and PTH, in comparison with a moderate elevation of FGF23 and unchanged PTH in human ARHR patients. To better understand this rare disease, we deleted the DMP1 gene in rabbit using CRISPR/Cas9. This rabbit model recapitulated many features of human ARHR, such as the rachitic rosary (expansion of the anterior rib ends at the costochondral junctions), moderately increased FGF23, and normal PTH levels, as well as severe defects in bone mineralization. Unexpectedly, all DMP1 KO rabbits died by postnatal week 8. They developed a severe bone microarchitecture defect: a major increase in the central canal areas of osteons, concurrent with massive accumulation of osteoid throughout all bone matrix (a defect in mineralization), suggesting a new paradigm, where rickets is caused by a combination of a defect in bone microarchitecture and a failure in mineralization. Furthermore, a study of DMP1 KO bones found accelerated chondrogenesis, whereas ARHR has commonly been thought to be involved in reduced chondrogenesis. Our findings with newly developed DMP1 KO rabbits suggest a revised understanding of the mechanism underlying ARHR. © 2019 American Society for Bone and Mineral Research.
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Affiliation(s)
- Tingjun Liu
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, Institute of Zoonosis, Jilin University, Changchun, China
| | - Jun Wang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xudong Xie
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ke Wang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - Tingting Sui
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, Institute of Zoonosis, Jilin University, Changchun, China
| | - Di Liu
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, Institute of Zoonosis, Jilin University, Changchun, China
| | - Liangxue Lai
- Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Hu Zhao
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - Zhanjun Li
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, Institute of Zoonosis, Jilin University, Changchun, China
| | - Jian Q Feng
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA
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14
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Alterations of Subchondral Bone Progenitor Cells in Human Knee and Hip Osteoarthritis Lead to a Bone Sclerosis Phenotype. Int J Mol Sci 2018; 19:ijms19020475. [PMID: 29415458 PMCID: PMC5855697 DOI: 10.3390/ijms19020475] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 02/06/2023] Open
Abstract
Subchondral bone tissue plays a key role in the initiation and progression of human and experimental osteoarthritis and has received considerable interest as a treatment target. Elevated bone turnover and remodeling leads to subchondral bone sclerosis that is characterized by an increase in bone material that is less mineralized. The aim of this study was to investigate whether perturbations in subchondral bone-resident progenitor cells might play a role in aberrant bone formation in osteoarthritis. Colony formation assays indicated similar clonogenicity of progenitor cells from non-sclerotic and sclerotic subchondral trabecular bone tissues of osteoarthritic knee and hip joints compared with controls from iliac crest bone. However, the osteogenic potential at the clonal level was approximately two-fold higher in osteoarthritis than controls. An osteogenic differentiation assay indicated an efficient induction of alkaline phosphatase activity but blunted in vitro matrix mineralization irrespective of the presence of sclerosis. Micro-computed tomography and histology demonstrated the formation of de novo calcified tissues by osteoblast-like cells in an ectopic implantation model. The expression of bone sialoprotein, a marker for osteoblast maturation and mineralization, was significantly less in sclerotic progenitor cells. Perturbation of resident progenitor cell function is associated with subchondral bone sclerosis and may be a treatment target for osteoarthritis.
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15
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Lin S, Cao L, Wang Q, Du J, Jiao D, Duan S, Wu J, Gan Q, Jiang X. Tailored biomimetic hydrogel based on a photopolymerised DMP1/MCF/gelatin hybrid system for calvarial bone regeneration. J Mater Chem B 2018; 6:414-427. [PMID: 32254521 DOI: 10.1039/c7tb02130e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Searching for effective osteoinduction factors with higher specificity and biosafety for the preparation of biomimetic materials, which mimic the natural bone extracellular matrix (ECM), seems to be an optimum strategy for achieving ideal bone regeneration.
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Affiliation(s)
- Shuxian Lin
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
| | - Lingyan Cao
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
| | - Qian Wang
- Department of Oral and Maxillofacial Surgery
- Stomatological Hospital of Chongqing Medical University
- Chongqing 402160
- China
| | - Jiahui Du
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
| | - Delong Jiao
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
| | - Shengzhong Duan
- Laboratory of Oral Microbiota and Systemic Diseases
- Ninth People's Hospital
- School
of Stomatology
- Shanghai 200011
- China
| | - Jiannan Wu
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
| | - Qi Gan
- The State Key Laboratory of Bioreactor Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xinquan Jiang
- Department of Prosthodontics
- Ninth People's Hospital affiliated to Shanghai Jiao Tong University
- School of Medicine
- Shanghai 200011
- China
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