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Mizoguchi T. In vivo dynamics of hard tissue-forming cell origins: Insights from Cre/loxP-based cell lineage tracing studies. Jpn Dent Sci Rev 2024; 60:109-119. [PMID: 38406212 PMCID: PMC10885318 DOI: 10.1016/j.jdsr.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/27/2024] Open
Abstract
Bone tissue provides structural support for our bodies, with the inner bone marrow (BM) acting as a hematopoietic organ. Within the BM tissue, two types of stem cells play crucial roles: mesenchymal stem cells (MSCs) (or skeletal stem cells) and hematopoietic stem cells (HSCs). These stem cells are intricately connected, where BM-MSCs give rise to bone-forming osteoblasts and serve as essential components in the BM microenvironment for sustaining HSCs. Despite the mid-20th century proposal of BM-MSCs, their in vivo identification remained elusive owing to a lack of tools for analyzing stemness, specifically self-renewal and multipotency. To address this challenge, Cre/loxP-based cell lineage tracing analyses are being employed. This technology facilitated the in vivo labeling of specific cells, enabling the tracking of their lineage, determining their stemness, and providing a deeper understanding of the in vivo dynamics governing stem cell populations responsible for maintaining hard tissues. This review delves into cell lineage tracing studies conducted using commonly employed genetically modified mice expressing Cre under the influence of LepR, Gli1, and Axin2 genes. These studies focus on research fields spanning long bones and oral/maxillofacial hard tissues, offering insights into the in vivo dynamics of stem cell populations crucial for hard tissue homeostasis.
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Li PL, Chen DF, Li XT, Hao RC, Zhao ZD, Li ZL, Yin BF, Tang J, Luo YW, Wu CT, Nie JJ, Zhu H. Microgel-based carriers enhance skeletal stem cell reprogramming towards immunomodulatory phenotype in osteoarthritic therapy. Bioact Mater 2024; 34:204-220. [PMID: 38235309 PMCID: PMC10792171 DOI: 10.1016/j.bioactmat.2023.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/13/2023] [Accepted: 12/23/2023] [Indexed: 01/19/2024] Open
Abstract
Skeletal stem cells (SSC) have gained attentions as candidates for the treatment of osteoarthritis due to their osteochondrogenic capacity. However, the immunomodulatory properties of SSC, especially under delivery operations, have been largely ignored. In the study, we found that Pdpn+ and Grem1+ SSC subpopulations owned immunoregulatory potential, and the single-cell RNA sequencing (scRNA-seq) data suggested that the mechanical activation of microgel carriers on SSC induced the generation of Pdpn+Grem1+Ptgs2+ SSC subpopulation, which was potent at suppressing macrophage inflammation. The microgel carriers promoted the YAP nuclear translocation, and the activated YAP protein was necessary for the increased expression of Ptgs2 and PGE2 in microgels-delivered SSC, which further suppressed the expression of TNF-ɑ, IL-1β and promoted the expression of IL-10 in macrophages. SSC delivered with microgels yielded better preventive effects on articular lesions and macrophage activation in osteoarthritic rats than SSC without microgels. Chemically blocking the YAP and Ptgs2 in microgels-delivered SSC partially abolished the enhanced protection on articular tissues and suppression on osteoarthritic macrophages. Moreover, microgel carriers significantly prolonged SSC retention time in vivo without increasing SSC implanting into osteoarthritic joints. Together, our study demonstrated that microgel carriers enhanced SSC reprogramming towards immunomodulatory phenotype to regulate macrophage phenotype transformation for effectively osteoarthritic therapy by promoting YAP protein translocation into nucleus. The study not only complement and perfect the immunological mechanisms of SSC-based therapy at the single-cell level, but also provide new insight for microgel carriers in stem cell-based therapy.
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Affiliation(s)
- Pei-Lin Li
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Da-Fu Chen
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Road Xinjiekou 31, Beijing, 100035, PR China
| | - Xiao-Tong Li
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Rui-Cong Hao
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Zhi-Dong Zhao
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
- People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, PR China
| | - Zhi-Ling Li
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Bo-Feng Yin
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Jie Tang
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Yu-Wen Luo
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Road Xinjiekou 31, Beijing, 100035, PR China
| | - Chu-Tse Wu
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
| | - Jing-Jun Nie
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Road Xinjiekou 31, Beijing, 100035, PR China
| | - Heng Zhu
- Department of Stem Cells and Regenerative Medicine, Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, PR China
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, PR China
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Liang J, Wang J, Sui B, Tong Y, Chai J, Zhou Q, Zheng C, Wang H, Kong L, Zhang H, Bai Y. Ptip safeguards the epigenetic control of skeletal stem cell quiescence and potency in skeletogenesis. Sci Bull (Beijing) 2024:S2095-9273(24)00138-5. [PMID: 38493069 DOI: 10.1016/j.scib.2024.02.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/23/2023] [Accepted: 02/21/2024] [Indexed: 03/18/2024]
Abstract
Stem cells remain in a quiescent state for long-term maintenance and preservation of potency; this process requires fine-tuning regulatory mechanisms. In this study, we identified the epigenetic landscape along the developmental trajectory of skeletal stem cells (SSCs) in skeletogenesis governed by a key regulator, Ptip (also known as Paxip1, Pax interaction with transcription-activation domain protein-1). Our results showed that Ptip is required for maintaining the quiescence and potency of SSCs, and loss of Ptip in type II collagen (Col2)+ progenitors causes abnormal activation and differentiation of SSCs, impaired growth plate morphogenesis, and long bone dysplasia. We also found that Ptip suppressed the glycolysis of SSCs through downregulation of phosphoglycerate kinase 1 (Pgk1) by repressing histone H3K27ac at the promoter region. Notably, inhibition of glycolysis improved the function of SSCs despite Ptip deficiency. To the best of our knowledge, this is the first study to establish an epigenetic framework based on Ptip, which safeguards skeletal stem cell quiescence and potency through metabolic control. This framework is expected to improve SSC-based treatments of bone developmental disorders.
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Affiliation(s)
- Jianfei Liang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China; Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China; Department of Implant Dentistry, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China; State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China
| | - Jing Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China
| | - Bingdong Sui
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China
| | - Yibo Tong
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Jihua Chai
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China
| | - Qin Zhou
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China; Department of Implant Dentistry, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - Chenxi Zheng
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China
| | - Hao Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China
| | - Liang Kong
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
| | - Haojian Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China; Department of Hematology, Zhongnan Hospital, Wuhan University, Wuhan 430079, China; Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan 430079, China; Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China.
| | - Yi Bai
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430079, China.
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Amorim T, Trivanovic D, Benova A, Li H, Tencerova M, Palmisano B. Young minds, deeper insights: a recap of the BMAS Summer School 2023, ranging from basic research to clinical implications of bone marrow adipose tissue. Biol Open 2024; 13:bio060263. [PMID: 38288785 PMCID: PMC10855210 DOI: 10.1242/bio.060263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024] Open
Abstract
Bone marrow adiposity (BMA) is a rapidly growing yet very young research field that is receiving worldwide attention based on its intimate relationship with skeletal and metabolic diseases, as well as hematology and cancer. Moreover, increasing numbers of young scientists and students are currently and actively working on BMA within their research projects. These developments led to the foundation of the International Bone Marrow Adiposity Society (BMAS), with the goal to promote BMA knowledge worldwide, and to train new generations of researchers interested in studying this field. Among the many initiatives supported by BMAS, there is the BMAS Summer School, inaugurated in 2021 and now at its second edition. The aim of the BMAS Summer School 2023 was to educate and train students by disseminating the latest advancement on BMA. Moreover, Summer School 2023 provided suggestions on how to write grants, deal with negative results in science, and start a laboratory, along with illustrations of alternative paths to academia. The event was animated by constructive and interactive discussions between early-career researchers and more senior scientists. In this report, we highlight key moments and lessons learned from the event.
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Affiliation(s)
- Tânia Amorim
- Neuroendocrinology Unit, Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh 15206, USA
| | - Drenka Trivanovic
- Group for Hematology and Stem Cells, Institute for Medical Research, University of Belgrade 11000, Serbia
| | - Andrea Benova
- Laboratory of Molecular Physiology of Bone, Institute of Physiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
| | - Hongshuai Li
- Department of Orthopaedics & Rehabilitation, Carver College of Medicine, University of Iowa, Iowa City 52246, USA
| | - Michaela Tencerova
- Laboratory of Molecular Physiology of Bone, Institute of Physiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
| | - Biagio Palmisano
- Department of Radiology, Oncology and Pathology, Sapienza University of Rome, Rome 00158, Italy
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Cao Y, Bolam SM, Boss AL, Murray HC, Munro JT, Poulsen RC, Dalbeth N, Brooks AES, Matthews BG. Characterization of adult human skeletal cells in different tissues reveals a CD90 +CD34 + periosteal stem/progenitor population. Bone 2024; 178:116926. [PMID: 37793499 DOI: 10.1016/j.bone.2023.116926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/27/2023] [Accepted: 10/01/2023] [Indexed: 10/06/2023]
Abstract
The periosteum plays a crucial role in bone healing and is an important source of skeletal stem and progenitor cells. Recent studies in mice indicate that diverse populations of skeletal progenitors contribute to growth, homeostasis and healing. Information about the in vivo identity and diversity of skeletal stem and progenitor cells in different compartments of the adult human skeleton is limited. In this study, we compared non-hematopoietic populations in matched tissues from the femoral head and neck of 21 human participants using spectral flow cytometry of freshly isolated cells. High-dimensional clustering analysis indicated significant differences in marker distribution between periosteum, articular cartilage, endosteum and bone marrow populations, and identified populations that were highly enriched or unique to specific tissues. Periosteum-enriched markers included CD90 and CD34. Articular cartilage, which has very poor regenerative potential, showed enrichment of multiple markers, including the PDPN+CD73+CD164+CD146- population previously reported to represent human skeletal stem cells. We further characterized periosteal populations by combining CD90 with other strongly expressed markers. CD90+CD34+ cells sorted directly from periosteum showed significant colony-forming unit fibroblasts (CFU-F) enrichment, rapid expansion, and consistent multi-lineage differentiation of clonal populations in vitro. In situ, CD90+CD34+ cells include a perivascular population in the outer layer of the periosteum and non-perivascular cells closer to the bone surface. CD90+ cells are also highly enriched for CFU-F in bone marrow and endosteum, but not articular cartilage. In conclusion, our study indicates considerable diversity in the non-hematopoietic cell populations in different tissue compartments within the adult human skeleton, and suggests that periosteal progenitor cells reside within the CD90+CD34+ population.
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Affiliation(s)
- Ye Cao
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Scott M Bolam
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - Anna L Boss
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
| | - Helen C Murray
- Department of Anatomy and Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Jacob T Munro
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - Raewyn C Poulsen
- Department of Pharmacology, University of Auckland, Auckland, New Zealand
| | - Nicola Dalbeth
- Department of Medicine, University of Auckland, Auckland, New Zealand
| | - Anna E S Brooks
- School of Biological Sciences, University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand
| | - Brya G Matthews
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand.
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Zhang L, Chen X, Shi X, Zhang M, Li N, Rui G, Chen Y, Xu R. Establishment and evaluation of a modified mouse model of renal subcapsular transplantation of microvolume cells. Biochem Biophys Res Commun 2023; 681:165-172. [PMID: 37776748 DOI: 10.1016/j.bbrc.2023.09.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/01/2023] [Accepted: 09/21/2023] [Indexed: 10/02/2023]
Abstract
The renal subcapsular space provides an easily accessible, nutrition-rich pocket that supports engraftment, and as such, is often used as a site for stem and cancer cell transplantation. Renal capsule transplantation requires high technical requirements, the recipient mice have greater surgical damage, the mouse kidney is small and the kidney capsule is fragile, and the operation is easy to fail. The conventional method is not suitable for microvolume cell transplantation to this site in animals with a small kidney, such as mice, due to high risks of cell loss or dislocation or injury to the capsule. In this study, we developed and validated a modified approach for the mouse model of renal subcapsular transplantation of microvolume mouse skeletal stem cells (SSCs). We used a pipette with a refined tip to separate the capsule from the parenchyma. Moreover, we used cells suspended in Matrigel rather than a liquid carrier for transplantation. Using the modified method, we were able to transplant microvolume mouse SSCs as low as 0.2 μL beneath the mouse renal capsule with excellent reproducibility. After 4 weeks of in vivo culture, the implanted mouse SSCs formed grafts on the surface of the parenchyma at the target site of transplantation. Histological staining of the grafts indicated osteogenic, fibrogenic, and lipogenic differentiation. Micro-CT imaging of the grafts revealed bone formation. This modified model could be used to effectively transplant different types of microvolume cells to the renal subcapsular space when the donor cells are difficult to acquire or the recipient mice have a very small size kidney.
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Affiliation(s)
- Long Zhang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xiaohui Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xueqing Shi
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Mingxia Zhang
- State Key Laboratory of Cellular Stress Biology, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China
| | - Na Li
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Gang Rui
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yu Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China.
| | - Ren Xu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China; State Key Laboratory of Cellular Stress Biology, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China.
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Dai H, Zhang H, Qiu Z, Shi Q. Periosteum-derived skeletal stem cells encapsulated in platelet-rich plasma enhance the repair of bone defect. Tissue Cell 2023; 83:102144. [PMID: 37354707 DOI: 10.1016/j.tice.2023.102144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Spontaneous restoration of large bone defects remains a challenge under infections, tumors, and crushing conditions. Current stem cell-based therapies for treating bone defects need improvement, because the used stem cells are isolated by a traditional protocol, which is based on their properties of in-vitro plastic adherence and fibroblastic colony formation. The stem cells isolated by the traditional protocol belong to a multicellular type mixture, individual cells vary in proliferative and osteogenic potential. Thus, developing a protocol capable of isolating stem cell subset with higher purity is required and urgent. AIM This study aimed to sort a subpopulation of stem cells from periosteum using flow cytometry (named as FC-PSCs), and evaluate the proliferative and osteogenic capacity of FC-PSCs in-vitro, and then establish a new stem cell-based therapies for treating bone defects by delivering the FC-PSCs within platelet-rich plasma (PRP). METHODS Mouse periosteum was used to sort FC-PSCs using flow cytometry with CD45-TER119-TIE2-ITGAV+CD90 + 6C3-CD105- markers, or isolate periosteum-derived stem cells with the traditional protocol (TP-PSCs) as control. After evaluating the FC-PSCs proliferation and osteogenic differentiation in-vitro as well as the promotive efficacy of platelet-rich plasma (PRP) on FC-PSCs proliferation and osteogenic differentiation, the FC-PSCs were delivered into the femoral epiphysis bone defect site of a mouse model by platelet-rich plasma (PRP). At postoperative 14 or 28 days, these mice were euthanized for harvest the femur specimens for micro-CT, histological evaluation. RESULTS In-vitro results determined that the FC-PSCs showed more capacity for proliferation and osteogenic differentiation compared with the TP-PSCs. In addition, in-vitro results showed the promotive efficacy of PRP on FC-PSCs proliferation and osteogenic differentiation. In-vivo results showed that the FC-PSCs delivered by PRP was able to facilitate the repair of bone defects by stimulating new bone formation and remodeling. CONCLUSION FC-PSCs delivered by PRP enhance the repair of bone defects by stimulating new bone formation and remodeling.
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Affiliation(s)
- Haibo Dai
- Department of Orthopedics (Second ward), Xiangtan Central Hospital, Xiangtan 411199, China; Xiangtan Clinical College, Xiangya Medical School, Central South University, Xiangtan 411199, China
| | - Haici Zhang
- Department of Orthopedics (Second ward), Xiangtan Central Hospital, Xiangtan 411199, China; Xiangtan Clinical College, Xiangya Medical School, Central South University, Xiangtan 411199, China
| | - Zhilong Qiu
- Department of Orthopedics (Second ward), Xiangtan Central Hospital, Xiangtan 411199, China; Xiangtan Clinical College, Xiangya Medical School, Central South University, Xiangtan 411199, China
| | - Qiang Shi
- Department of Spine Surgery, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha 410018, China; Clinical College of Changsha Central Hospital, Xiangya Medical College, Central South University, Changsha 410018, China; Department of Sports Medicine, Xiangya Hospital, Central South University, Changsha 410008, China.
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Rong L, Zhang L, Yang Z, Xu L. New insights into the properties, functions, and aging of skeletal stem cells. Osteoporos Int 2023:10.1007/s00198-023-06736-4. [PMID: 37069243 DOI: 10.1007/s00198-023-06736-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 03/27/2023] [Indexed: 04/19/2023]
Abstract
Bone-related diseases pose a major health burden for modern society. Bone is one of the organs that rely on stem cell function to maintain tissue homeostasis. Stem cell therapy has emerged as an effective new strategy to repair and replace damaged tissue. Although research on bone marrow mesenchymal stem cells has been conducted over the last few decades, the identity and definition of the true skeletal stem cell population remains controversial. Due to technological advances, some progress has been made in the prospective separation and function research of purified skeletal stem cells. Here, we reviewed the recent progress of highly purified skeletal stem cells, their function in bone development and repair, and the impact of aging on skeletal stem cells. Various studies on animal and human models distinguished and isolated skeletal stem cells using different surface markers based on flow-cytometry-activated cell sorting. The roles of different types of skeletal stem cells in bone growth, remodeling, and repair are gradually becoming clear. Thanks to technological advances, SSCs can be specifically identified and purified for functional testing and molecular analysis. The basic features of SSCs and their roles in bone development and repair and the effects of aging on SSCs are gradually being elucidated. Future mechanistic studies can help to develop new therapeutic interventions to improve various types of skeletal diseases and enhance the regenerative potential of SSCs.
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Affiliation(s)
- Lingjun Rong
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lixia Zhang
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zaigang Yang
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
| | - Lijun Xu
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Doherty L, Wan M, Peterson A, Youngstrom DW, King JS, Kalajzic I, Hankenson KD, Sanjay A. Wnt-associated adult stem cell marker Lgr6 is required for osteogenesis and fracture healing. Bone 2023; 169:116681. [PMID: 36708855 PMCID: PMC10015414 DOI: 10.1016/j.bone.2023.116681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/18/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023]
Abstract
Despite the remarkable regenerative capacity of skeletal tissues, nonunion of bone and failure of fractures to heal properly presents a significant clinical concern. Stem and progenitor cells are present in bone and become activated following injury; thus, elucidating mechanisms that promote adult stem cell-mediated healing is important. Wnt-associated adult stem marker Lgr6 is implicated in the regeneration of tissues with well-defined stem cell niches in stem cell-reliant organs. Here, we demonstrate that Lgr6 is dynamically expressed in osteoprogenitors in response to fracture injury. We used an Lgr6-null mouse model and found that Lgr6 expression is necessary for maintaining bone volume and efficient postnatal bone regeneration in adult mice. Skeletal progenitors isolated from Lgr6-null mice have reduced colony-forming potential and reduced osteogenic differentiation capacity due to attenuated cWnt signaling. Lgr6-null mice consist of a lower proportion of self-renewing stem cells. In response to fracture injury, Lgr6-null mice have a deficiency in the proliferation of periosteal progenitors and reduced ALP activity. Further, analysis of the bone regeneration phase and remodeling phase of fracture healing in Lgr6-null mice showed impaired endochondral ossification and decreased mineralization. We propose that in contrast to not being required for successful skeletal development, Lgr6-positive cells have a direct role in endochondral bone repair.
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Affiliation(s)
- Laura Doherty
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA; School of Dental Medicine, UConn Health, Farmington, CT 06030, USA
| | - Matthew Wan
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA
| | - Anna Peterson
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA
| | - Daniel W Youngstrom
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA
| | - Justin S King
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA
| | - Ivo Kalajzic
- School of Dental Medicine, UConn Health, Farmington, CT 06030, USA; Department of Reconstructive Sciences, School of Dental Medicine, UConn Health, Farmington, CT 06030, USA
| | - Kurt D Hankenson
- Department of Orthopaedic Surgery, School of Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Archana Sanjay
- Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, School of Medicine, USA.
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10
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Zhou Q, He LL, Du LZ, Zhao NB, Lv CP, Liang JF. Impaired function of skeletal stem cells derived from growth plates in ovariectomized mice. J Bone Miner Metab 2023; 41:163-170. [PMID: 36847866 DOI: 10.1007/s00774-023-01406-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 01/18/2023] [Indexed: 03/01/2023]
Abstract
INTRODUCTION Mouse skeletal stem cells (mSSCs, CD45-Ter119-Tie2-CD51+Thy-6C3-CD105-CD200+population) are identified in growth plates (GP) and play important roles in bone regeneration. However, the role of mSSCs in osteoporosis remains unclear. MATERIALS AND METHODS The GP were stained by HE staining, and the mSSC lineage was analyzed by flow cytometry at postnatal of 14 days and 30 days in wild-type mice. The mice (8 weeks) were either sham operated or ovariectomy (OVX) and then sacrificed at 2, 4 and 8 w. The GP were stained by Movat staining, and mSSC lineage was analyzed. Then, mSSCs were sorted by fluorescence-activated cell sorting (FACS); the clonal ability, chondrogenic differentiation and osteogenic differentiation were evaluated, and the changed genes were analyzed by RNA-seq. RESULTS The percentage of mSSCs were decreased with the narrow GP. Heights of GP were decreased significantly in 8w-ovx mice compared with 8w-sham mice. We found the percentage of mSSCs were decreased in mice at 2w after ovx, but the cell numbers were not changed. Further, the percentage and cell numbers of mSSCs were not changed at 4w and 8w after ovx. Importantly, the clonal ability, chondrogenic differentiation and osteogenic differentiation of mSSCs were impaired at 8w after ovx. We found 114 genes were down-regulated in mSSCs, including skeletal developmental genes such as Col10a1, Col2a1, Mef2c, Sparc, Matn1, Scube2 and Dlx5. On the contrary, 526 genes were up-regulated, including pro-inflammatory genes such as Csf1, Nfkbla, Nfatc2, Nfkb1 and Nfkb2. CONCLUSION Function of mSSCs was impaired by up-regulating pro-inflammatory genes in ovx-induced osteoporosis.
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Affiliation(s)
- Q Zhou
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - L L He
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - L Z Du
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - N B Zhao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - C P Lv
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - J F Liang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China.
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11
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Yin BF, Li ZL, Yan ZQ, Guo Z, Liang JW, Wang Q, Zhao ZD, Li PL, Hao RC, Han MY, Li XT, Mao N, Ding L, Chen DF, Gao Y, Zhu H. Psoralen alleviates radiation-induced bone injury by rescuing skeletal stem cell stemness through AKT-mediated upregulation of GSK-3β and NRF2. Stem Cell Res Ther 2022; 13:241. [PMID: 35672836 PMCID: PMC9172007 DOI: 10.1186/s13287-022-02911-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/28/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Repairing radiation-induced bone injuries remains a significant challenge in the clinic, and few effective medicines are currently available. Psoralen is a principal bioactive component of Cullen corylifolium (L.) Medik and has been reported to have antitumor, anti-inflammatory, and pro-osteogenesis activities. However, less information is available regarding the role of psoralen in the treatment of radiation-induced bone injury. In this study, we explored the modulatory effects of psoralen on skeletal stem cells and their protective effects on radiation-induced bone injuries. METHODS The protective effects of psoralen on radiation-induced osteoporosis and irradiated bone defects were evaluated by microCT and pathological analysis. In addition, the cell proliferation, osteogenesis, and self-renewal of SSCs were explored. Further, the underlying mechanisms of the protective of psoralen were investigated by using RNA sequencing and functional gain and loss experiments in vitro and in vivo. Statistical significance was analyzed using Student's t test. The one-way ANOVA was used in multiple group data analysis. RESULTS Here, we demonstrated that psoralen, a natural herbal extract, mitigated radiation-induced bone injury (irradiation-induced osteoporosis and irradiated bone defects) in mice partially by rescuing the stemness of irradiated skeletal stem cells. Mechanistically, psoralen restored the stemness of skeletal stem cells by alleviating the radiation-induced suppression of AKT/GSK-3β and elevating NRF2 expression in skeletal stem cells. Furthermore, the expression of KEAP1 in skeletal stem cells did not significantly change in the presence of psoralen. Moreover, blockade of NRF2 in vivo partially abolished the promising effects of psoralen in a murine model of irradiation-induced osteoporosis and irradiated bone regeneration. CONCLUSIONS In summary, our findings identified psoralen as a potential medicine to mitigate bone radiation injury. In addition, skeletal stem cells and AKT-GSK-3β and NRF2 may thus represent therapeutic targets for treating radiation-induced bone injury.
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Affiliation(s)
- Bo-Feng Yin
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China
| | - Zhi-Ling Li
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China
| | - Zi-Qiao Yan
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, People's Republic of China
| | - Zheng Guo
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, People's Republic of China.,Medical Center of Air Forces, PLA, Road Fucheng 30, Beijing, 100142, People's Republic of China
| | - Jia-Wu Liang
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, People's Republic of China.,Medical Center of Air Forces, PLA, Road Fucheng 30, Beijing, 100142, People's Republic of China
| | - Qian Wang
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, People's Republic of China.,Medical Center of Air Forces, PLA, Road Fucheng 30, Beijing, 100142, People's Republic of China
| | - Zhi-Dong Zhao
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,People's Liberation Army General Hospital, Road Fuxing 28, Beijing, 100853, People's Republic of China.,Medical Center of Air Forces, PLA, Road Fucheng 30, Beijing, 100142, People's Republic of China
| | - Pei-Lin Li
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China
| | - Rui-Cong Hao
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,Graduate School of Anhui Medical University, 81 Meishan Road, Shushan Qu, Hefei, 230032, Anhui, People's Republic of China
| | - Meng-Yue Han
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China.,Graduate School of Anhui Medical University, 81 Meishan Road, Shushan Qu, Hefei, 230032, Anhui, People's Republic of China
| | - Xiao-Tong Li
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China
| | - Ning Mao
- Beijing Institute of Basic Medical Sciences, Road Taiping 27, Beijing, 100850, People's Republic of China
| | - Li Ding
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China. .,Medical Center of Air Forces, PLA, Road Fucheng 30, Beijing, 100142, People's Republic of China.
| | - Da-Fu Chen
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Eastern Street Xinjiekou 31, Beijing, 100035, China.
| | - Yue Gao
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China.
| | - Heng Zhu
- Beijing Institute of Radiation Medicine, Road Taiping 27, Beijing, 100850, People's Republic of China. .,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, 100850, People's Republic of China. .,Graduate School of Anhui Medical University, 81 Meishan Road, Shushan Qu, Hefei, 230032, Anhui, People's Republic of China. .,Beijing Institute of Basic Medical Sciences, Road Taiping 27, Beijing, 100850, People's Republic of China.
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12
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Lopez EM, Leclerc K, Ramsukh M, Parente PE, Patel K, Aranda CJ, Josephson AM, Remark LH, Kirby DJ, Buchalter DB, Hadi T, Morgani SM, Ramkhelawon B, Leucht P. Modulating the systemic and local adaptive immune response after fracture improves bone regeneration during aging. Bone 2022; 157:116324. [PMID: 34998981 PMCID: PMC9016796 DOI: 10.1016/j.bone.2021.116324] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 12/21/2021] [Accepted: 12/28/2021] [Indexed: 01/04/2023]
Abstract
Tissue injury leads to the well-orchestrated mobilization of systemic and local innate and adaptive immune cells. During aging, immune cell recruitment is dysregulated, resulting in an aberrant inflammatory response that is detrimental for successful healing. Here, we precisely define the systemic and local immune cell response after femur fracture in young and aging mice and identify increased toll-like receptor signaling as a potential culprit for the abnormal immune cell recruitment observed in aging animals. Myd88, an upstream regulator of TLR-signaling lies at the core of this aging phenotype, and local treatment of femur fractures with a Myd88 antagonist in middle-aged mice reverses the aging phenotype of impaired fracture healing, thus offering a promising therapeutic target that could overcome the negative impact of aging on bone regeneration.
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Affiliation(s)
- Emma Muiños Lopez
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Kevin Leclerc
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Malissa Ramsukh
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Paulo El Parente
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Karan Patel
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Carlos J Aranda
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America; Jaffe Food Allergy Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
| | - Anna M Josephson
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Lindsey H Remark
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America; Department of Cell Biology, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - David J Kirby
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Daniel B Buchalter
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Tarik Hadi
- Department of Surgery, Division of Endovascular Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Sophie M Morgani
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Bhama Ramkhelawon
- Department of Surgery, Division of Endovascular Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America; Department of Cell Biology, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America
| | - Philipp Leucht
- Department of Orthopaedic Surgery, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America; Department of Cell Biology, NYU Robert I. Grossman School of Medicine, New York, NY, United States of America.
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13
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Kwon HR, Kim JH, Woods JP, Olson LE. Skeletal stem cell fate defects caused by Pdgfrb activating mutation. Development 2021; 148:272709. [PMID: 34738614 DOI: 10.1242/dev.199607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 10/28/2021] [Indexed: 11/20/2022]
Abstract
Autosomal dominant PDGFRβ gain-of-function mutations in mice and humans cause a spectrum of wasting and overgrowth disorders afflicting the skeleton and other connective tissues, but the cellular origin of these disorders remains unknown. We demonstrate that skeletal stem cells (SSCs) isolated from mice with a gain-of-function D849V point mutation in PDGFRβ exhibit colony formation defects that parallel the wasting or overgrowth phenotypes of the mice. Single-cell RNA transcriptomics with SSC-derived polyclonal colonies demonstrates alterations in osteogenic and chondrogenic precursors caused by PDGFRβD849V. Mutant cells undergo poor osteogenesis in vitro with increased expression of Sox9 and other chondrogenic markers. Mice with PDGFRβD849V exhibit osteopenia. Increased STAT5 phosphorylation and overexpression of Igf1 and Socs2 in PDGFRβD849V cells suggests that overgrowth in mice involves PDGFRβD849V activating the STAT5-IGF1 axis locally in the skeleton. Our study establishes that PDGFRβD849V causes osteopenic skeletal phenotypes that are associated with intrinsic changes in SSCs, promoting chondrogenesis over osteogenesis.
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Affiliation(s)
- Hae Ryong Kwon
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Jang H Kim
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.,Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - John P Woods
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.,Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Lorin E Olson
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.,Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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14
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Le Q, Madhu V, Hart JM, Farber CR, Zunder ER, Dighe AS, Cui Q. Current evidence on potential of adipose derived stem cells to enhance bone regeneration and future projection. World J Stem Cells 2021; 13:1248-1277. [PMID: 34630861 PMCID: PMC8474721 DOI: 10.4252/wjsc.v13.i9.1248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/22/2021] [Accepted: 08/18/2021] [Indexed: 02/06/2023] Open
Abstract
Injuries to the postnatal skeleton are naturally repaired through successive steps involving specific cell types in a process collectively termed “bone regeneration”. Although complex, bone regeneration occurs through a series of well-orchestrated stages wherein endogenous bone stem cells play a central role. In most situations, bone regeneration is successful; however, there are instances when it fails and creates non-healing injuries or fracture nonunion requiring surgical or therapeutic interventions. Transplantation of adult or mesenchymal stem cells (MSCs) defined by the International Society for Cell and Gene Therapy (ISCT) as CD105+CD90+CD73+CD45-CD34-CD14orCD11b-CD79αorCD19-HLA-DR- is being investigated as an attractive therapy for bone regeneration throughout the world. MSCs isolated from adipose tissue, adipose-derived stem cells (ADSCs), are gaining increasing attention since this is the most abundant source of adult stem cells and the isolation process for ADSCs is straightforward. Currently, there is not a single Food and Drug Administration (FDA) approved ADSCs product for bone regeneration. Although the safety of ADSCs is established from their usage in numerous clinical trials, the bone-forming potential of ADSCs and MSCs, in general, is highly controversial. Growing evidence suggests that the ISCT defined phenotype may not represent bona fide osteoprogenitors. Transplantation of both ADSCs and the CD105- sub-population of ADSCs has been reported to induce bone regeneration. Most notably, cells expressing other markers such as CD146, AlphaV, CD200, PDPN, CD164, CXCR4, and PDGFRα have been shown to represent osteogenic sub-population within ADSCs. Amongst other strategies to improve the bone-forming ability of ADSCs, modulation of VEGF, TGF-β1 and BMP signaling pathways of ADSCs has shown promising results. The U.S. FDA reveals that 73% of Investigational New Drug applications for stem cell-based products rely on CD105 expression as the “positive” marker for adult stem cells. A concerted effort involving the scientific community, clinicians, industries, and regulatory bodies to redefine ADSCs using powerful selection markers and strategies to modulate signaling pathways of ADSCs will speed up the therapeutic use of ADSCs for bone regeneration.
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Affiliation(s)
- Quang Le
- Department of Orthopaedic Surgery, University of Virginia School of Medicine, Charlottesville, VA 22908, United States
| | - Vedavathi Madhu
- Orthopaedic Surgery Research, Thomas Jefferson University, Philadelphia, PA 19107, United States
| | - Joseph M Hart
- Department of Orthopaedic Surgery, University of Virginia School of Medicine, Charlottesville, VA 22908, United States
| | - Charles R Farber
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, United States
- Departments of Public Health Sciences and Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, United States
| | - Eli R Zunder
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, United States
| | - Abhijit S Dighe
- Department of Orthopaedic Surgery, University of Virginia School of Medicine, Charlottesville, VA 22908, United States
| | - Quanjun Cui
- Department of Orthopaedic Surgery, University of Virginia School of Medicine, Charlottesville, VA 22908, United States
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15
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Abstract
PURPOSE OF REVIEW The adult skeleton contains stem cells involved in growth, homeostasis, and healing. Mesenchymal or skeletal stem cells are proposed to provide precursors to osteoblasts, chondrocytes, marrow adipocytes, and stromal cells. We review the evidence for existence and functionality of different skeletal stem cell pools, and the tools available for identifying or targeting these populations in mouse and human tissues. RECENT FINDINGS Lineage tracing and single cell-based techniques in mouse models indicate that multiple pools of stem cells exist in postnatal bone. These include growth plate stem cells, stem and progenitor cells in the diaphysis, reticular cells that only form bone in response to injury, and injury-responsive periosteal stem cells. New staining protocols have also been described for prospective isolation of human skeletal stem cells. Several populations of postnatal skeletal stem and progenitor cells have been identified in mice, and we have an increasing array of tools to target these cells. Most Cre models lack a high degree of specificity to define single populations. Human studies are less advanced and require further efforts to refine methods for identifying stem and progenitor cells in adult bone.
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Affiliation(s)
- Ye Cao
- Department of Molecular Medicine and Pathology, University of Auckland, Private Bag 92-019, Auckland, 1142, New Zealand
| | - Emma J Buckels
- Department of Molecular Medicine and Pathology, University of Auckland, Private Bag 92-019, Auckland, 1142, New Zealand
| | - Brya G Matthews
- Department of Molecular Medicine and Pathology, University of Auckland, Private Bag 92-019, Auckland, 1142, New Zealand.
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16
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Abstract
PURPOSE OF REVIEW Although many signalling pathways have been discovered to be essential in mesenchymal stem/stromal (MSC) differentiation, it has become increasingly clear in recent years that epigenetic regulation of gene transcription is a vital component of lineage determination, encompassing diet, lifestyle and parental influences on bone, fat and cartilage development. RECENT FINDINGS This review discusses how specific enzymes that modify histone methylation and acetylation or DNA methylation orchestrate the differentiation programs in lineage determination of MSC and the epigenetic changes that facilitate development of bone related diseases such as osteoporosis. The review also describes how environmental factors such as mechanical loading influence the epigenetic signatures of MSC, and how the use of chemical agents or small peptides can regulate epigenetic drift in MSC populations during ageing and disease. Epigenetic regulation of MSC lineage commitment is controlled through changes in enzyme activity, which modifies DNA and histone residues leading to alterations in chromatin structure. The co-ordinated epigenetic regulation of transcriptional activation and repression act to mediate skeletal tissue homeostasis, where deregulation of this process can lead to bone loss during ageing or osteoporosis.
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Affiliation(s)
- Dimitrios Cakouros
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Stan Gronthos
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA, Australia.
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.
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17
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Abstract
Accumulating evidence supports the idea that stem and progenitor cells play important roles in skeletal development. Over the last decade, the definition of skeletal stem and progenitor cells has evolved from cells simply defined by their in vitro behaviors to cells fully defined by a combination of sophisticated approaches, including serial transplantation assays and in vivo lineage-tracing experiments. These approaches have led to better identification of the characteristics of skeletal stem cells residing in multiple sites, including the perichondrium of the fetal bone, the resting zone of the postnatal growth plate, the bone marrow space and the periosteum in adulthood. These diverse groups of skeletal stem cells appear to closely collaborate and achieve a number of important biological functions of bones, including not only bone development and growth, but also bone maintenance and repair. Although these are important findings, we are only beginning to understand the diversity and the nature of skeletal stem and progenitor cells, and how they actually behave in vivo.
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Affiliation(s)
- Noriaki Ono
- University of Michigan School of Dentistry, Ann Arbor, MI, United States.
| | - Deepak H Balani
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Henry M Kronenberg
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
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18
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Patra D, DeLassus E, Mueller J, Abou-Ezzi G, Sandell LJ. Site-1 protease regulates skeletal stem cell population and osteogenic differentiation in mice. Biol Open 2018; 7:bio.032094. [PMID: 29437042 PMCID: PMC5861364 DOI: 10.1242/bio.032094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Site-1 protease (S1P) is a proprotein convertase with essential functions in the conversion of precursor proteins to their active form. In earlier studies, we demonstrated that S1P ablation in the chondrocyte lineage results in a drastic reduction in endochondral bone formation. To investigate the mechanistic contribution of S1P to bone development we ablated S1P in the osterix lineage in mice. S1P ablation in this lineage results in osteochondrodysplasia and variable degrees of early postnatal scoliosis. Embryonically, even though Runx2 and osterix expression are normal, S1P ablation results in a delay in vascular invasion and endochondral bone development. Mice appear normal when born, but by day 7 display pronounced dwarfism with fragile bones that exhibit significantly reduced mineral density, mineral apposition rate, bone formation rate and reduced osteoblasts indicating severe osteopenia. Mice suffer from a drastic reduction in bone marrow mesenchymal progenitors as analyzed by colony-forming unit-fibroblast assay. Fluorescence-activated cell sorting analysis of the skeletal mesenchyme harvested from bone marrow and collagenase-digested bone show a drastic reduction in hematopoietic lineage-negative, endothelial-negative, CD105+ skeletal stem cells. Bone marrow mesenchymal progenitors are unable to differentiate into osteoblasts in vitro, with no effect on adipogenic differentiation. Postnatal mice have smaller growth plates with reduced hypertrophic zone. Thus, S1P controls bone development directly by regulating the skeletal progenitor population and their differentiation into osteoblasts. This article has an associated First Person interview with the first author of the paper. Summary: S1P governs a fundamental aspect of skeletal development and homeostasis, mainly the maintenance and osteogenic differentiation of skeletogenic stem cells that are a source of osteoblast and chondrocyte lineages.
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Affiliation(s)
- Debabrata Patra
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Elizabeth DeLassus
- Department of Biochemistry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jennifer Mueller
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Grazia Abou-Ezzi
- Department of Medicine, Oncology Division, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Linda J Sandell
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.,Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO 63110, USA
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19
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Abstract
The development and maintenance of the skeleton requires a steady source of skeletal progenitors to provide the osteoblasts and chondrocytes necessary for bone and cartilage growth and development. The current model for skeletal stem cells (SSCs) posits that SSC/progenitor cells are present in bone marrow (BM) and other osteogenic sites such as cranial sutures where they undergo self-renewal and differentiation to give rise to the main skeletal tissues. SSCs hold great promise for understanding skeletal biology and genetic diseases of bone as well as for the advancement of bone tissue engineering and regenerative medicine strategies. In the past few years, a considerable effort has been devoted to identifying and purifying skeletal stem cells and determining their contribution to bone formation and homeostasis. Here, we review recent progress in this area with particular emphasis on the discovery of specific SSC markers, their use in tracking the progression of cell populations along specific lineages and the regulation of SSCs in both the appendicular and cranial skeleton.
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Affiliation(s)
- Fatma F Mohamed
- Departments of Periodontics and Oral Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48109-0600
| | - Renny T Franceschi
- Departments of Periodontics and Oral Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48109-0600.,Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI 48109-0600
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20
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Fierro FA, Nolta JA, Adamopoulos IE. Concise Review: Stem Cells in Osteoimmunology. Stem Cells 2017; 35:1461-1467. [PMID: 28390147 DOI: 10.1002/stem.2625] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 02/06/2017] [Accepted: 03/16/2017] [Indexed: 12/11/2022]
Abstract
Bone remodeling is a lifelong process in which mature bone tissue is removed from the skeleton by bone resorption and is replenished by new during ossification or bone formation. The remodeling cycle requires both the differentiation and activation of two cell types with opposing functions; the osteoclast, which orchestrates bone resorption, and the osteoblast, which orchestrates bone formation. The differentiation of these cells from their respective precursors is a process which has been overshadowed by enigma, particularly because the precise osteoclast precursor has not been identified and because the identification of skeletal stem cells, which give rise to osteoblasts, is very recent. Latest advances in the area of stem cell biology have enabled us to gain a better understanding of how these differentiation processes occur in physiological and pathological conditions. In this review we postulate that modulation of stem cells during inflammatory conditions is a necessary prerequisite of bone remodeling and therefore an essential new component to the field of osteoimmunology. In this context, we highlight the role of transcription factor nuclear factor of activated T cells cytoplasmic 1 (NFATc1), because it directly links inflammation with differentiation of osteoclasts and osteoblasts. Stem Cells 2017;35:1461-1467.
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Affiliation(s)
- Fernando A Fierro
- Stem Cell Program, University of California at Davis, Sacramento, California, USA.,Department of Cell Biology and Human Anatomy, University of California at Davis, Sacramento, California, USA
| | - Jan A Nolta
- Stem Cell Program, University of California at Davis, Sacramento, California, USA.,Department of Cell Biology and Human Anatomy, University of California at Davis, Sacramento, California, USA.,Department of Internal Medicine, University of California at Davis, Sacramento, California, USA
| | - Iannis E Adamopoulos
- Institute for Pediatric Regenerative Medicine, University of California at Davis, Sacramento, California, USA.,Department of Rheumatology, University of California at Davis, Sacramento, California, USA
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21
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Lee LCY, Gadegaard N, de Andrés MC, Turner LA, Burgess KV, Yarwood SJ, Wells J, Salmeron-Sanchez M, Meek D, Oreffo ROC, Dalby MJ. Nanotopography controls cell cycle changes involved with skeletal stem cell self-renewal and multipotency. Biomaterials 2016; 116:10-20. [PMID: 27914982 PMCID: PMC5226065 DOI: 10.1016/j.biomaterials.2016.11.032] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 01/31/2023]
Abstract
In culture isolated bone marrow mesenchymal stem cells (more precisely termed skeletal stem cells, SSCs) spontaneously differentiate into fibroblasts, preventing the growth of large numbers of multipotent SSCs for use in regenerative medicine. However, the mechanisms that regulate the expansion of SSCs, while maintaining multipotency and preventing fibroblastic differentiation are poorly understood. Major hurdles to understanding how the maintenance of SSCs is regulated are (a) SSCs isolated from bone marrow are heterogeneous populations with different proliferative characteristics and (b) a lack of tools to investigate SSC number expansion and multipotency. Here, a nanotopographical surface is used as a tool that permits SSC proliferation while maintaining multipotency. It is demonstrated that retention of SSC phenotype in culture requires adjustments to the cell cycle that are linked to changes in the activation of the mitogen activated protein kinases. This demonstrates that biomaterials can offer cross-SSC culture tools and that the biological processes that determine whether SSCs retain multipotency or differentiate into fibroblasts are subtle, in terms of biochemical control, but are profound in terms of determining cell fate.
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Affiliation(s)
- Louisa C Y Lee
- Centre for Cell Engineering, Institute of Molecular, Cell and Systems Biology, College of Medical Veterinary and Life Sciences, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Nikolaj Gadegaard
- Division of Biomedical Engineering, School of Engineering, Rankine Building, University of Glasgow, Glasgow, G12 8LT, UK
| | - María C de Andrés
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton, SO16 6YD, UK
| | - Lesley-Anne Turner
- Centre for Cell Engineering, Institute of Molecular, Cell and Systems Biology, College of Medical Veterinary and Life Sciences, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Karl V Burgess
- Glasgow Polyomics Facility, College of Medical, Veterinary and Life Sciences, University of Glasgow, Wolfson Wohl Cancer Research Centre, Garsube Campus, Bearsden, G61 1QH, UK
| | - Stephen J Yarwood
- Institute of Biological Chemistry, Biophysics and Bioengineering, William Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Julia Wells
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton, SO16 6YD, UK
| | - Manuel Salmeron-Sanchez
- Division of Biomedical Engineering, School of Engineering, Rankine Building, University of Glasgow, Glasgow, G12 8LT, UK
| | - Dominic Meek
- Department of Orthopaedics, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK
| | - Richard O C Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton, SO16 6YD, UK
| | - Matthew J Dalby
- Centre for Cell Engineering, Institute of Molecular, Cell and Systems Biology, College of Medical Veterinary and Life Sciences, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
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22
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Xavier M, Oreffo ROC, Morgan H. Skeletal stem cell isolation: A review on the state-of-the-art microfluidic label-free sorting techniques. Biotechnol Adv 2016; 34:908-923. [PMID: 27236022 DOI: 10.1016/j.biotechadv.2016.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/13/2016] [Accepted: 05/22/2016] [Indexed: 01/03/2023]
Abstract
Skeletal stem cells (SSC) are a sub-population of bone marrow stromal cells that reside in postnatal bone marrow with osteogenic, chondrogenic and adipogenic differentiation potential. SSCs reside only in the bone marrow and have organisational and regulatory functions in the bone marrow microenvironment and give rise to the haematopoiesis-supportive stroma. Their differentiation capacity is restricted to skeletal lineages and therefore the term SSC should be clearly distinguished from mesenchymal stem cells which are reported to exist in extra-skeletal tissues and, critically, do not contribute to skeletal development. SSCs are responsible for the unique regeneration capacity of bone and offer unlimited potential for application in bone regenerative therapies. A current unmet challenge is the isolation of homogeneous populations of SSCs, in vitro, with homogeneous regeneration and differentiation capacities. Challenges that limit SSC isolation include a) the scarcity of SSCs in bone marrow aspirates, estimated at between 1 in 10-100,000 mononuclear cells; b) the absence of specific markers and thus the phenotypic ambiguity of the SSC and c) the complexity of bone marrow tissue. Microfluidics provides innovative approaches for cell separation based on bio-physical features of single cells. Here we review the physical principles underlying label-free microfluidic sorting techniques and review their capacity for stem cell selection/sorting from complex (heterogeneous) samples.
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Affiliation(s)
- Miguel Xavier
- Faculty of Physical Sciences and Engineering, Institute for Life Sciences, University of Southampton, SO17 1BJ, United Kingdom.; Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Southampton General Hospital, Tremona Road, SO16 6YD Southampton, United Kingdom..
| | - Richard O C Oreffo
- Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Southampton General Hospital, Tremona Road, SO16 6YD Southampton, United Kingdom..
| | - Hywel Morgan
- Faculty of Physical Sciences and Engineering, Institute for Life Sciences, University of Southampton, SO17 1BJ, United Kingdom..
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23
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Mabuchi Y, Matsuzaki Y. Prospective isolation of resident adult human mesenchymal stem cell population from multiple organs. Int J Hematol 2016; 103:138-44. [PMID: 26676805 DOI: 10.1007/s12185-015-1921-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/01/2015] [Accepted: 12/02/2015] [Indexed: 12/22/2022]
Abstract
Mesenchymal stem/stromal cells (MSCs) have the potential to form colonies in culture and reside in adult tissues. Because MSCs have been defined using cells cultured in vitro, discrepancies have arisen between studies concerning their properties. There are also differences between populations obtained using different isolation methods. This review article focuses on recent developments in the identification of novel MSC markers for the in vivo localization and prospective isolation of human MSCs. The prospective isolation method described in this study represents an important strategy for the isolation of MSCs in a short period of time, and may find applications for regenerative medicine. Purified MSCs can be tailored according to their intended clinical therapeutic applications. Lineage tracing methods define the MSC phenotype and can be used to investigate the physiological roles of MSCs in vivo. These findings may facilitate the development of effective stem cell treatments.
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Abstract
Age-related osteoporotic fractures are major health care problem worldwide and are the result of impaired bone formation, decreased bone mass and bone fragility. Bone formation is accomplished by skeletal stem cells (SSC) that are recruited to bone surfaces from bone marrow microenvironment. This review discusses targeting SSC to enhance bone formation and to abolish age-related bone fragility in the context of using stem cells for treatment of age-related disorders. Recent studies are presented that have demonstrated that SSC exhibit impaired functions during aging due to intrinsic senescence-related changes as well as the presence of senescent microenvironment. Also, a number of approaches aiming at increasing bone formation through targeting SSC and that include systemic SSC transplantation, systemic SSC targeting using aptamers or antibodies, use of therapeutic screteome and tissue engineering approaches will be presented and discussed.
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Affiliation(s)
- Abdullah Aldahmash
- Stem Cell Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
- Department of Endocrinology and Metabolism, University Hospital of Odense, 5000, Odense, Denmark.
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Abstract
Skeletal stem cells (SSCs) reside in the postnatal bone marrow and give rise to cartilage, bone, hematopoiesis-supportive stroma and marrow adipocytes in defined in vivo assays. These lineages emerge in a specific sequence during embryonic development and post natal growth, and together comprise a continuous anatomical system, the bone-bone marrow organ. SSCs conjoin skeletal and hematopoietic physiology, and are a tool for understanding and ameliorating skeletal and hematopoietic disorders. Here and in the accompanying poster, we concisely discuss the biology of SSCs in the context of the development and postnatal physiology of skeletal lineages, to which their use in medicine must remain anchored.
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Affiliation(s)
- Paolo Bianco
- Department of Molecular Medicine, Sapienza University of Rome, Rome 00161, Italy
| | - Pamela G Robey
- Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
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Abstract
Bone physiology and stem cells were tightly intertwined with one another, both conceptually and experimentally, long before the current explosion of interest in stem cells and so-called regenerative medicine. Bone is home to the two best known and best characterized systems of postnatal stem cells, and it is the only organ in which two stem cells and their dependent lineages coordinate the overall adaptive responses of two major physiological systems. All along, the nature and the evolutionary significance of the interplay of bone and hematopoiesis have remained a major scientific challenge, but also allowed for some of the most spectacular developments in cell biology-based medicine, such as hematopoietic stem cell transplantation. This question recurs in novel forms at multiple turning points over time: today, it finds in the biology of the "niche" its popular phrasing. Entirely new avenues of investigation emerge as a new view of bone in physiology and medicine is progressively established. Looking at bone and stem cells in a historical perspective provides a unique case study to highlight the general evolution of science in biomedicine since the end of World War II to the present day. A paradigm shift in science and in its relation to society and policies occurred in the second half of the XXth century, with major implications thereof for health, industry, drug development, market and society. Current interest in stem cells in bone as in other fields is intertwined with that shift. New opportunities and also new challenges arise. This article is part of a Special Issue entitled "Stem cells and bone".
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Affiliation(s)
- Paolo Bianco
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy.
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Abstract
Postnatal skeletal stem cells are a unique class of progenitors with biological properties that extend well beyond the limits of stemness as commonly defined. Skeletal stem cells sustain skeletal tissue homeostasis, organize and maintain the complex architectural structure of the bone marrow microenvironment and provide a niche for hematopoietic progenitor cells. The identification of stem cells in the human post-natal skeleton has profoundly changed our approach to the physiology and pathology of this system. Skeletal diseases have been long interpreted essentially in terms of defective function of differentiated cells and/or abnormal turnover of the matrix that they produce. The notion of a skeletal stem cell has brought forth multiple, novel concepts in skeletal biology that provide potential alternative concepts. At the same time, the recognition of the complex functions played by skeletal progenitors, such as the structural and functional organization of the bone marrow, has provided an innovative, unifying perspective for understanding bone and bone marrow changes simultaneously occurring in many disorders. Finally, the possibility to isolate and highly enrich for skeletal progenitors, enables us to reproduce perfectly normal or pathological organ miniatures. These, in turn, provide suitable models to investigate and manipulate the pathogenetic mechanisms of many genetic and non-genetic skeletal diseases. This article is part of a Special Issue entitled Stem cells and Bone.
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Affiliation(s)
- Mara Riminucci
- Department of Molecular Medicine, Sapienza University of Rome, Italy.
| | - Cristina Remoli
- Department of Molecular Medicine, Sapienza University of Rome, Italy
| | - Pamela G Robey
- Craniofacial and Skeletal Diseases Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Paolo Bianco
- Department of Molecular Medicine, Sapienza University of Rome, Italy
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Gothard D, Greenhough J, Ralph E, Oreffo RO. Prospective isolation of human bone marrow stromal cell subsets: A comparative study between Stro-1-, CD146- and CD105-enriched populations. J Tissue Eng 2014; 5:2041731414551763. [PMID: 25383172 PMCID: PMC4221949 DOI: 10.1177/2041731414551763] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 08/06/2014] [Indexed: 12/11/2022] Open
Abstract
Stro-1 has proved an efficacious marker for enrichment of skeletal stem and progenitor cells although isolated populations remain heterogeneous, exhibiting variable colony-forming efficiency and osteogenic differentiation potential. The emerging findings that skeletal stem cells originate from adventitial reticular cells have brought two further markers to the fore including CD146 and CD105 (both primarily endothelial and perivascular). This study has compared CD146-, CD105- and Stro-1 (individual and in combination)-enriched human bone marrow stromal cell subsets and assessed whether these endothelial/perivascular markers offer further selection over conventional Stro-1. Fluorescent cell sorting quantification showed that CD146 and CD105 both targeted smaller (2.22% ± 0.59% and 6.94% ± 1.34%, respectively) and potentially different human bone marrow stromal cell fractions compared to Stro-1 (16.29% ± 0.78%). CD146+, but not CD105+, cells exhibited similar alkaline phosphatase-positive colony-forming efficiency in vitro and collagen/proteoglycan deposition in vivo to Stro-1+ cells. Molecular analysis of a number of select osteogenic and potential osteo-predictive genes including ALP, CADM1, CLEC3B, DCN, LOXL4, OPN, POSTN and SATB2 showed Stro-1+ and CD146+ populations possessed similar expression profiles. A discrete human bone marrow stromal cell fraction (2.04% ± 0.41%) exhibited positive immuno-labelling for both Stro-1 and CD146. The data presented here show that CD146+ populations are comparable but not superior to Stro-1+ populations. However, this study demonstrates the critical need for new candidate markers with which to isolate homogeneous skeletal stem cell populations or skeletal stem cell populations which exhibit homogeneous in vitro/in vivo characteristics, for implementation within tissue engineering and regenerative medicine strategies.
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Affiliation(s)
- David Gothard
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development and Health, Institute of Developmental Sciences, Southampton General Hospital, School of Medicine, University of Southampton, Southampton, UK
| | - Joanna Greenhough
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development and Health, Institute of Developmental Sciences, Southampton General Hospital, School of Medicine, University of Southampton, Southampton, UK
| | - Esther Ralph
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development and Health, Institute of Developmental Sciences, Southampton General Hospital, School of Medicine, University of Southampton, Southampton, UK
| | - Richard Oc Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development and Health, Institute of Developmental Sciences, Southampton General Hospital, School of Medicine, University of Southampton, Southampton, UK
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29
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Aarvold A, Smith JO, Tayton ER, Jones AMH, Dawson JI, Lanham S, Briscoe A, Dunlop DG, Oreffo ROC. A tissue engineering strategy for the treatment of avascular necrosis of the femoral head. Surgeon 2013; 11:319-25. [PMID: 23540814 PMCID: PMC3989057 DOI: 10.1016/j.surge.2013.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 02/13/2013] [Accepted: 02/20/2013] [Indexed: 11/01/2022]
Abstract
BACKGROUND & PURPOSE Skeletal stem cells (SSCs) and impaction bone grafting (IBG) can be combined to produce a mechanically stable living bone composite. This novel strategy has been translated to the treatment of avascular necrosis of the femoral head. Surgical technique, clinical follow-up and retrieval analysis data of this translational case series is presented. METHODS SSCs and milled allograft were impacted into necrotic bone in five femoral heads of four patients. Cell viability was confirmed by parallel in vitro culture of the cell-graft constructs. Patient follow-up was by serial clinical and radiological examination. Tissue engineered bone was retrieved from two retrieved femoral heads and was analysed by histology, microcomputed tomography (μCT) and mechanical testing. RESULTS Three patients remain asymptomatic at 22- to 44-month follow-up. One patient (both hips) required total hip replacement due to widespread residual necrosis. Retrieved tissue engineered bone demonstrated a mature trabecular micro-architecture histologically and on μCT. Bone density and axial compression strength were comparable to trabecular bone. CONCLUSIONS Clinical follow-up shows this to be an effective new treatment for focal early stage avascular necrosis of the femoral head. Unique retrieval analysis of clinically translated tissue engineered bone has demonstrated regeneration of tissue that is both structurally and functionally analogous to normal trabecular bone.
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Affiliation(s)
- A Aarvold
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, University of Southampton, Institute of Developmental Sciences, Tremona Road, Southampton SO16 6YD, UK.
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