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Wang X, Ge Q, Zeng Q, Zou K, Bao Z, Ying J, Wu Z, Jin H, Chen J, Xu T. Dnmt3b ablation affects fracture repair process by regulating apoptosis. BMC Musculoskelet Disord 2024; 25:180. [PMID: 38413962 PMCID: PMC10900613 DOI: 10.1186/s12891-024-07283-7] [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: 11/26/2023] [Accepted: 02/14/2024] [Indexed: 02/29/2024] Open
Abstract
PURPOSE Previous studies have shown that DNA methyltransferase 3b (Dnmt3b) is the only Dnmt responsive to fracture repair and Dnmt3b ablation in Prx1-positive stem cells and chondrocyte cells both delayed fracture repair. Our study aims to explore the influence of Dnmt3b ablation in Gli1-positive stem cells in fracture healing mice and the underlying mechanism. METHODS We generated Gli1-CreERT2; Dnmt3bflox/flox (Dnmt3bGli1ER) mice to operated tibia fracture. Fracture callus tissues of Dnmt3bGli1ER mice and control mice were collected and analyzed by X-ray, micro-CT, biomechanical testing, histopathology and TUNEL assay. RESULTS The cartilaginous callus significantly decrease in ablation of Dnmt3b in Gli1-positive stem cells during fracture repair. The chondrogenic and osteogenic indicators (Sox9 and Runx2) in the fracture healing tissues in Dnmt3bGli1ER mice much less than control mice. Dnmt3bGli1ER mice led to delayed bone callus remodeling and decreased biomechanical properties of the newly formed bone during fracture repair. Both the expressions of Caspase-3 and Caspase-8 were upregulated in Dnmt3bGli1ER mice as well as the expressions of BCL-2. CONCLUSIONS Our study provides an evidence that Dnmt3b ablation Gli1-positive stem cells can affect fracture healing and lead to poor fracture healing by regulating apoptosis to decrease chondrocyte hypertrophic maturation.
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Affiliation(s)
- Xu Wang
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Qinwen Ge
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Qinghe Zeng
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Kaiao Zou
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Zhengsheng Bao
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The Second College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Jun Ying
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Zhen Wu
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang Province, China
| | - Hongting Jin
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
| | - Jiali Chen
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
| | - Taotao Xu
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.
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Wu L, Liu Z, Xiao L, Ai M, Cao Y, Mao J, Song K. The Role of Gli1 + Mesenchymal Stem Cells in Osteogenesis of Craniofacial Bone. Biomolecules 2023; 13:1351. [PMID: 37759749 PMCID: PMC10526808 DOI: 10.3390/biom13091351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/23/2023] [Accepted: 08/26/2023] [Indexed: 09/29/2023] Open
Abstract
Glioma-associated oncogene homolog 1 (Gli1) is a transcriptional activator of hedgehog (Hh) signaling that regulates target gene expression and several cellular biological processes. Cell lineage tracing techniques have highlighted Gli1 as an ideal marker for mesenchymal stem cells (MSCs) in vivo. Gli1+ MSCs are critical for the osteogenesis of the craniofacial bone; however, the regulatory mechanism by which Gli1+ MSCs mediate the bone development and tissue regeneration of craniofacial bone has not been systematically outlined. This review comprehensively elucidates the specific roles of Gli1+ MSCs in craniofacial bone osteogenesis. In addition to governing craniofacial bone development, Gli1+ MSCs are associated with the tissue repair of craniofacial bone under pathological conditions. Gli1+ MSCs promote intramembranous and endochondral ossification of the craniofacial bones, and assist the osteogenesis of the craniofacial bone by improving angiopoiesis. This review summarizes the novel role of Gli1+ MSCs in bone development and tissue repair in craniofacial bones, which offers new insights into bone regeneration therapy.
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Affiliation(s)
- Laidi Wu
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Zhixin Liu
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Li Xiao
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Mi Ai
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Yingguang Cao
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Jing Mao
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
| | - Ke Song
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Department of Prosthodontics and Implantology, School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regen-Eration, Wuhan 430022, China
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Xia SL, Ma ZY, Wang B, Gao F, Guo SY, Chen XH. Icariin promotes the proliferation and osteogenic differentiation of bone-derived mesenchymal stem cells in patients with osteoporosis and T2DM by upregulating GLI-1. J Orthop Surg Res 2023; 18:500. [PMID: 37454090 DOI: 10.1186/s13018-023-03998-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 07/10/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND The function of mesenchymal stem cells (MSCs) from patients with osteoporosis (OP) is impaired and worsens in patients with type 2 diabetes mellitus (T2DM). Icariin (ICA) is the major active flavonoid glucoside isolated from traditional Chinese herbal Epimedium pubescens, and confirmed able to improve bone mass of OP patients. OBJECTIVE To investigate the effect of ICA on the proliferation and osteogenic differentiation of bone-derived MSCs (BMSCs) from patients with OP and T2DM and uncover the potential mechanism. METHODS BMSCs were treated with ICA, and proliferation and osteogenic potency were evaluated using the 2,5-diphenyl-2H-tetrazolium bromide (MTT) assay and detection of osteogenic markers (ALP, RUNX2, SPP1, COL1A1, and mineralized nodules) was performed. RNA sequencing and bioinformatic analysis were performed to identify differentially expressed genes (DEGs) after ICA treatment and screen proliferation- and osteogenic differentiation-related processes. Gene gain and loss were performed to confirm the role of the key candidate gene. RESULTS ICA significantly promoted the proliferation and osteogenic differentiation of BMSCs. A total of 173 DEGs were identified after ICA treatment. Six DEGs (GLI-1, IGF2, BMP6, WNT5A, PTHLH, and MAPK14) enriched in both proliferation- and osteogenic differentiation-related processes were screened; GLI-1 had the highest validated |log2FC| value. Overexpression of GLI-1 enhanced the proliferation and osteogenic differentiation of BMSCs, and knockdown of GLI-1 weakened the positive effect of ICA on BMSCs. CONCLUSION ICA promoted the proliferation and osteogenic differentiation of impaired BMSCs by upregulating GLI-1.
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Affiliation(s)
- Sheng-Li Xia
- Department of Orthopedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, 201318, China
| | - Zi-Yuan Ma
- Department of Orthopedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, 201318, China
| | - Bin Wang
- Department of Orthopedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, 201318, China
| | - Feng Gao
- Department of Orthopedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, 201318, China
| | - Sheng-Yang Guo
- Department of Orthopedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, 201318, China
| | - Xu-Han Chen
- Zhoupu Community Health Service Center, 163 Shenmei East Road, Pudong New Area, Shanghai, 201318, China.
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Marcucio R, Miclau T, Bahney C. A Shifting Paradigm: Transformation of Cartilage to Bone during Bone Repair. J Dent Res 2023; 102:13-20. [PMID: 36303415 PMCID: PMC9791286 DOI: 10.1177/00220345221125401] [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] [Indexed: 12/30/2022] Open
Abstract
While formation and regeneration of the skeleton have been studied for a long period of time, significant scientific advances in this field continue to emerge based on an unmet clinical need to improve options to promote bone repair. In this review, we discuss the relationship between mechanisms of bone formation and bone regeneration. Data clearly show that regeneration is not simply a reinduction of the molecular and cellular programs that were used for development. Instead, the mechanical environment exerts a strong influence on the mode of repair, while during development, cell-intrinsic processes drive the mode of skeletal formation. A major advance in the field has shown that cell fate is flexible, rather than terminal, and that chondrocytes are able to differentiate into osteoblasts and other cell types during development and regeneration. This is discussed in a larger context of regeneration in vertebrates as well as the clinical implication that this shift in understanding presents.
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Affiliation(s)
- R.S. Marcucio
- University of California, San Francisco (UCSF), Orthopaedic Trauma Institute, San Francisco, CA, USA
| | - T. Miclau
- University of California, San Francisco (UCSF), Orthopaedic Trauma Institute, San Francisco, CA, USA
| | - C.S. Bahney
- University of California, San Francisco (UCSF), Orthopaedic Trauma Institute, San Francisco, CA, USA
- Steadman Philippon Research Institute, Vail, CO, USA
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