1
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Mizoguchi T. In vivo dynamics of hard tissue-forming cell origins: Insights from Cre/loxP-based cell lineage tracing studies. JAPANESE DENTAL SCIENCE REVIEW 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] [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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2
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Lawton A, Tripodi N, Feehan J. Running on empty: Exploring stem cell exhaustion in geriatric musculoskeletal disease. Maturitas 2024; 188:108066. [PMID: 39089047 DOI: 10.1016/j.maturitas.2024.108066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 06/26/2024] [Accepted: 07/10/2024] [Indexed: 08/03/2024]
Abstract
Ageing populations globally are associated with increased musculoskeletal disease, including osteoporosis and sarcopenia. These conditions place a significant burden of disease on the individual, society and the economy. To address this, we need to understand the underpinning biological changes, including stem cell exhaustion, which plays a key role in the ageing of the musculoskeletal system. This review of the recent evidence provides an overview of the associated biological processes. The review utilised the PubMed/Medline, Science Direct, and Google Scholar databases. Mechanisms of ageing identified involve a reaction to the chronic inflammation and oxidative stress associated with ageing, resulting in progenitor cell senescence and adipogenic differentiation, leading to decreased mass and quality of both bone and muscle tissue. Although the mechanisms underpinning stem cell exhaustion are unclear, it remains a promising avenue through which to identify new strategies for prevention, detection and management.
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Affiliation(s)
- Amy Lawton
- Institute for Health and Sport, Victoria University, Melbourne, Australia; College of Sport, Health and Engineering, Victoria University, Melbourne, Australia
| | - Nicholas Tripodi
- Institute for Health and Sport, Victoria University, Melbourne, Australia; First Year College, Victoria University, Melbourne, Australia
| | - Jack Feehan
- Institute for Health and Sport, Victoria University, Melbourne, Australia; School of Health and Biomedical Sciences, STEM College, RMIT, Melbourne, Australia.
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3
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Xing X, Li Z, Xu J, Chen AZ, Archer M, Wang Y, Xu M, Wang Z, Zhu M, Qin Q, Thottappillil N, Zhou M, James AW. Requirement of Pdgfrα+ cells for calvarial bone repair. Stem Cells Transl Med 2024; 13:791-802. [PMID: 38986535 PMCID: PMC11328938 DOI: 10.1093/stcltm/szae041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 05/19/2024] [Indexed: 07/12/2024] Open
Abstract
Platelet-derived growth factor receptor α (PDGFRα) is often considered as a general marker of mesenchymal cells and fibroblasts, but also shows expression in a portion of osteoprogenitor cells. Within the skeleton, Pdgfrα+ mesenchymal cells have been identified in bone marrow and periosteum of long bones, where they play a crucial role in participating in fracture repair. A similar examination of Pdgfrα+ cells in calvarial bone healing has not been examined. Here, we utilize Pdgfrα-CreERTM;mT/mG reporter animals to examine the contribution of Pdgfrα+ mesenchymal cells to calvarial bone repair through histology and single-cell RNA sequencing (scRNA-Seq). Results showed that Pdgfrα+ mesenchymal cells are present in several cell clusters by scRNA-Seq, and by histology a dramatic increase in Pdgfrα+ cells populated the defect site at early timepoints to give rise to healed bone tissue overtime. Notably, diphtheria toxin-mediated ablation of Pdgfrα reporter+ cells resulted in significantly impaired calvarial bone healing. Our findings suggest that Pdgfrα-expressing cells within the calvarial niche play a critical role in the process of calvarial bone repair.
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Affiliation(s)
- Xin Xing
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Zhao Li
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Jiajia Xu
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Austin Z Chen
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Mary Archer
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Yiyun Wang
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Mingxin Xu
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Ziyi Wang
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Manyu Zhu
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Qizhi Qin
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Neelima Thottappillil
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Myles Zhou
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Aaron W James
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States
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4
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Pereira AL, Galli S, Nombela‐Arrieta C. Bone marrow niches for hematopoietic stem cells. Hemasphere 2024; 8:e133. [PMID: 39086665 PMCID: PMC11289431 DOI: 10.1002/hem3.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/05/2024] [Accepted: 05/06/2024] [Indexed: 08/02/2024] Open
Abstract
Hematopoietic stem cells (HSCs) are the cornerstone of the hematopoietic system. HSCs sustain the continuous generation of mature blood derivatives while self-renewing to preserve a relatively constant pool of progenitors throughout life. Yet, long-term maintenance of functional HSCs exclusively takes place in association with their native tissue microenvironment of the bone marrow (BM). HSCs have been long proposed to reside in fixed and identifiable anatomical units found in the complex BM tissue landscape, which control their identity and fate in a deterministic manner. In the last decades, tremendous progress has been made in the dissection of the cellular and molecular fabric of the BM, the structural organization governing tissue function, and the plethora of interactions established by HSCs. Nonetheless, a holistic model of the mechanisms controlling HSC regulation in their niche is lacking to date. Here, we provide an overview of our current understanding of BM anatomy, HSC localization, and crosstalk within local cellular neighborhoods in murine and human tissues, and highlight fundamental open questions on how HSCs functionally integrate in the BM microenvironment.
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Affiliation(s)
- Ana Luísa Pereira
- Department of Medical Oncology and HematologyUniversity Hospital and University of ZurichZurichSwitzerland
| | - Serena Galli
- Department of Medical Oncology and HematologyUniversity Hospital and University of ZurichZurichSwitzerland
| | - César Nombela‐Arrieta
- Department of Medical Oncology and HematologyUniversity Hospital and University of ZurichZurichSwitzerland
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5
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Trompet D, Melis S, Chagin AS, Maes C. Skeletal stem and progenitor cells in bone development and repair. J Bone Miner Res 2024; 39:633-654. [PMID: 38696703 DOI: 10.1093/jbmr/zjae069] [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: 12/04/2023] [Revised: 04/11/2024] [Accepted: 04/17/2024] [Indexed: 05/04/2024]
Abstract
Bone development, growth, and repair are complex processes involving various cell types and interactions, with central roles played by skeletal stem and progenitor cells. Recent research brought new insights into the skeletal precursor populations that mediate intramembranous and endochondral bone development. Later in life, many of the cellular and molecular mechanisms determining development are reactivated upon fracture, with powerful trauma-induced signaling cues triggering a variety of postnatal skeletal stem/progenitor cells (SSPCs) residing near the bone defect. Interestingly, in this injury context, the current evidence suggests that the fates of both SSPCs and differentiated skeletal cells can be considerably flexible and dynamic, and that multiple cell sources can be activated to operate as functional progenitors generating chondrocytes and/or osteoblasts. The combined implementation of in vivo lineage tracing, cell surface marker-based cell selection, single-cell molecular analyses, and high-resolution in situ imaging has strongly improved our insights into the diversity and roles of developmental and reparative stem/progenitor subsets, while also unveiling the complexity of their dynamics, hierarchies, and relationships. Albeit incompletely understood at present, findings supporting lineage flexibility and possibly plasticity among sources of osteogenic cells challenge the classical dogma of a single primitive, self-renewing, multipotent stem cell driving bone tissue formation and regeneration from the apex of a hierarchical and strictly unidirectional differentiation tree. We here review the state of the field and the newest discoveries in the origin, identity, and fates of skeletal progenitor cells during bone development and growth, discuss the contributions of adult SSPC populations to fracture repair, and reflect on the dynamism and relationships among skeletal precursors and differentiated cell lineages. Further research directed at unraveling the heterogeneity and capacities of SSPCs, as well as the regulatory cues determining their fate and functioning, will offer vital new options for clinical translation toward compromised fracture healing and bone regenerative medicine.
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Affiliation(s)
- Dana Trompet
- Laboratory of Skeletal Cell Biology and Physiology (SCEBP), Skeletal Biology and Engineering Research Center (SBE), Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, 40530 Gothenburg, Sweden
- Department of Physiology and Pharmacology, Karolinska Institute, 17177 Stockholm, Sweden
| | - Seppe Melis
- Laboratory of Skeletal Cell Biology and Physiology (SCEBP), Skeletal Biology and Engineering Research Center (SBE), Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium
| | - Andrei S Chagin
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, 40530 Gothenburg, Sweden
- Department of Physiology and Pharmacology, Karolinska Institute, 17177 Stockholm, Sweden
| | - Christa Maes
- Laboratory of Skeletal Cell Biology and Physiology (SCEBP), Skeletal Biology and Engineering Research Center (SBE), Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium
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6
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Wu C, Yan J, Ge C, Xie L, He Y, Zhao Z, Deng Y, Dong Q, Yin L. Macrophage membrane-reversibly camouflaged nanotherapeutics accelerate fracture healing by fostering MSCs recruitment and osteogenic differentiation. J Nanobiotechnology 2024; 22:411. [PMID: 38997706 PMCID: PMC11241938 DOI: 10.1186/s12951-024-02679-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 06/30/2024] [Indexed: 07/14/2024] Open
Abstract
The fracture healing outcome is largely dependent on the quantities as well as osteogenic differentiation capacities of mesenchymal stem cells (MSCs) at the lesion site. Herein, macrophage membrane (MM)-reversibly cloaked nanocomplexes (NCs) are engineered for the lesion-targeted and hierarchical co-delivery of short stromal derived factor-1α peptide (sSDF-1α) and Ckip-1 small interfering RNA (Ckip-1 siRNA, siCkip-1) to promote bone repair by concurrently fostering recruitment and osteogenic differentiation of endogenous MSCs. To construct the NCs, a membrane-penetrating α-helical polypeptide first assembles with siCkip-1, and the cationic NCs are sequentially coated with catalase and an outer shell of sSDF-1α-anchored MM. Due to MM-assisted inflammation homing, intravenously injected NCs could efficiently accumulate at the fractured femur, where catalase decomposes the local hydrogen peroxide to generate oxygen bubbles that drives the shedding of sSDF-1α-anchored MM in the extracellular compartment. The exposed, cationic inner core thus enables robust trans-membrane delivery into MSCs to induce Ckip-1 silencing. Consequently, sSDF-1α-guided MSCs recruitment cooperates with siCkip-1-mediated osteogenic differentiation to facilitate bone formation and accelerate bone fracture healing. This study provides an enlightened strategy for the hierarchical co-delivery of macromolecular drugs into different cellular compartments, and it also renders a promising modality for the management of fracture healing.
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Affiliation(s)
- Cheng Wu
- Department of Orthopedics, The Second Affiliated Hospital, Soochow University, Suzhou, 215004, China
- Department of Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Jing Yan
- Department of Gastroenterology, The Second Affiliated Hospital, Soochow University, Suzhou, 215004, China
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Chenglong Ge
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Lucheng Xie
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Yunjie He
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Ziyin Zhao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Yekun Deng
- Department of Orthopedics, The Second Affiliated Hospital, Soochow University, Suzhou, 215004, China
| | - Qirong Dong
- Department of Orthopedics, The Second Affiliated Hospital, Soochow University, Suzhou, 215004, China.
| | - Lichen Yin
- Department of Gastroenterology, The Second Affiliated Hospital, Soochow University, Suzhou, 215004, China.
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
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7
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Patrick R, Janbandhu V, Tallapragada V, Tan SSM, McKinna EE, Contreras O, Ghazanfar S, Humphreys DT, Murray NJ, Tran YTH, Hume RD, Chong JJH, Harvey RP. Integration mapping of cardiac fibroblast single-cell transcriptomes elucidates cellular principles of fibrosis in diverse pathologies. SCIENCE ADVANCES 2024; 10:eadk8501. [PMID: 38905342 PMCID: PMC11192082 DOI: 10.1126/sciadv.adk8501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 05/14/2024] [Indexed: 06/23/2024]
Abstract
Single-cell technology has allowed researchers to probe tissue complexity and dynamics at unprecedented depth in health and disease. However, the generation of high-dimensionality single-cell atlases and virtual three-dimensional tissues requires integrated reference maps that harmonize disparate experimental designs, analytical pipelines, and taxonomies. Here, we present a comprehensive single-cell transcriptome integration map of cardiac fibrosis, which underpins pathophysiology in most cardiovascular diseases. Our findings reveal similarity between cardiac fibroblast (CF) identities and dynamics in ischemic versus pressure overload models of cardiomyopathy. We also describe timelines for commitment of activated CFs to proliferation and myofibrogenesis, profibrotic and antifibrotic polarization of myofibroblasts and matrifibrocytes, and CF conservation across mouse and human healthy and diseased hearts. These insights have the potential to inform knowledge-based therapies.
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Affiliation(s)
- Ralph Patrick
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Vaibhao Janbandhu
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
| | | | - Shannon S. M. Tan
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
| | - Emily E. McKinna
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
| | - Osvaldo Contreras
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Shila Ghazanfar
- School of Mathematics and Statistics, The University of Sydney, Camperdown, NSW 2006, Australia
- Charles Perkins Centre, The University of Sydney, Camperdown, NSW 2006, Australia
- Sydney Precision Data Science Centre, The University of Sydney, Camperdown, NSW 2006, Australia
| | - David T. Humphreys
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Nicholas J. Murray
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Yen T. H. Tran
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
| | - Robert D. Hume
- Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
- School of Medical Science, The University of Sydney, Camperdown, NSW 2006, Australia
- Centre for Heart Failure and Diseases of the Aorta, The Baird Institute, Sydney, NSW 2042, Australia
| | - James J. H. Chong
- Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
- Department of Cardiology, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Richard P. Harvey
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia
- School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia
- School of Biotechnology and Biomolecular Science, UNSW Sydney, Kensington, NSW 2052, Australia
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8
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Pal China S, Kalyanaraman H, Zhuang S, Cabriales JA, Sah RL, Pilz RB. Protein kinase G2 activation restores Wnt signaling and bone mass in glucocorticoid-induced osteoporosis in mice. JCI Insight 2024; 9:e175089. [PMID: 38885330 PMCID: PMC11383176 DOI: 10.1172/jci.insight.175089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 05/31/2024] [Indexed: 06/20/2024] Open
Abstract
Osteoporotic fractures are a major complication of long-term glucocorticoid therapy. Glucocorticoids transiently increase bone resorption, but they predominantly inhibit bone formation and induce osteocyte apoptosis, leading to bone loss. Current treatments of glucocorticoid-induced osteoporosis aim mainly at reducing bone resorption and are, therefore, inadequate. We previously showed that signaling via the NO/cGMP/protein kinase G pathway plays a key role in skeletal homeostasis. Here, we show that pharmacological PKG activation with the guanylyl cyclase-1 activator cinaciguat or expression of a constitutively active, mutant PKG2R242Q restored proliferation, differentiation, and survival of primary mouse osteoblasts exposed to dexamethasone. Cinaciguat treatment of WT mice or osteoblast-specific expression of PKG2R242Q in transgenic mice prevented dexamethasone-induced loss of cortical bone mass and strength. These effects of cinaciguat and PKG2R242Q expression were due to preserved bone formation parameters and osteocyte survival. The basis for PKG2's effects appeared to be through recovery of Wnt/β-catenin signaling, which was suppressed by glucocorticoids but critical for proliferation, differentiation, and survival of osteoblast-lineage cells. Cinaciguat reduced dexamethasone activation of osteoclasts, but this did not occur in the PKG2R242Q transgenic mice, suggesting a minor role in osteoprotection. We propose that existing PKG-targeting drugs could represent a novel therapeutic approach to prevent glucocorticoid-induced osteoporosis.
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Affiliation(s)
| | | | | | | | - Robert L Sah
- Department of Bioengineering, UCSD, La Jolla, California, USA
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9
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Ding P, Gao C, Zhou J, Mei J, Li G, Liu D, Li H, Liao P, Yao M, Wang B, Lu Y, Peng X, Jiang C, Yin J, Huang Y, Zheng M, Gao Y, Zhang C, Gao J. Mitochondria from osteolineage cells regulate myeloid cell-mediated bone resorption. Nat Commun 2024; 15:5094. [PMID: 38877020 PMCID: PMC11178781 DOI: 10.1038/s41467-024-49159-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 05/24/2024] [Indexed: 06/16/2024] Open
Abstract
Interactions between osteolineage cells and myeloid cells play important roles in maintaining skeletal homeostasis. Herein, we find that osteolineage cells transfer mitochondria to myeloid cells. Impairment of the transfer of mitochondria by deleting MIRO1 in osteolineage cells leads to increased myeloid cell commitment toward osteoclastic lineage cells and promotes bone resorption. In detail, impaired mitochondrial transfer from osteolineage cells alters glutathione metabolism and protects osteoclastic lineage cells from ferroptosis, thus promoting osteoclast activities. Furthermore, mitochondrial transfer from osteolineage cells to myeloid cells is involved in the regulation of glucocorticoid-induced osteoporosis, and glutathione depletion alleviates the progression of glucocorticoid-induced osteoporosis. These findings reveal an unappreciated mechanism underlying the interaction between osteolineage cells and myeloid cells to regulate skeletal metabolic homeostasis and provide insights into glucocorticoid-induced osteoporosis progression.
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Affiliation(s)
- Peng Ding
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Chuan Gao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Jian Zhou
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Jialun Mei
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Gan Li
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Delin Liu
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Hao Li
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Peng Liao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Meng Yao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Bingqi Wang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Yafei Lu
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Xiaoyuan Peng
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Chenyi Jiang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Jimin Yin
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Yigang Huang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China
| | - Minghao Zheng
- Centre for Orthopaedic Translational Research, Medical School, University of Western Australia, Nedlands, WA, 6009, Australia
| | - Youshui Gao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China.
| | - Changqing Zhang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China.
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China.
| | - Junjie Gao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China.
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 200233, Shanghai, China.
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10
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Bixel MG, Sivaraj KK, Timmen M, Mohanakrishnan V, Aravamudhan A, Adams S, Koh BI, Jeong HW, Kruse K, Stange R, Adams RH. Angiogenesis is uncoupled from osteogenesis during calvarial bone regeneration. Nat Commun 2024; 15:4575. [PMID: 38834586 PMCID: PMC11150404 DOI: 10.1038/s41467-024-48579-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 05/06/2024] [Indexed: 06/06/2024] Open
Abstract
Bone regeneration requires a well-orchestrated cellular and molecular response including robust vascularization and recruitment of mesenchymal and osteogenic cells. In femoral fractures, angiogenesis and osteogenesis are closely coupled during the complex healing process. Here, we show with advanced longitudinal intravital multiphoton microscopy that early vascular sprouting is not directly coupled to osteoprogenitor invasion during calvarial bone regeneration. Early osteoprogenitors emerging from the periosteum give rise to bone-forming osteoblasts at the injured calvarial bone edge. Microvessels growing inside the lesions are not associated with osteoprogenitors. Subsequently, osteogenic cells collectively invade the vascularized and perfused lesion as a multicellular layer, thereby advancing regenerative ossification. Vascular sprouting and remodeling result in dynamic blood flow alterations to accommodate the growing bone. Single cell profiling of injured calvarial bones demonstrates mesenchymal stromal cell heterogeneity comparable to femoral fractures with increase in cell types promoting bone regeneration. Expression of angiogenesis and hypoxia-related genes are slightly elevated reflecting ossification of a vascularized lesion site. Endothelial Notch and VEGF signaling alter vascular growth in calvarial bone repair without affecting the ossification progress. Our findings may have clinical implications for bone regeneration and bioengineering approaches.
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Affiliation(s)
- M Gabriele Bixel
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany.
| | - Kishor K Sivaraj
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
| | - Melanie Timmen
- Department of Regenerative Musculoskeletal Medicine, Institute of Musculoskeletal Medicine, University Hospital Münster, D-48149, Münster, Germany
| | - Vishal Mohanakrishnan
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
| | - Anusha Aravamudhan
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
| | - Susanne Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
| | - Bong-Ihn Koh
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
| | - Hyun-Woo Jeong
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
- Max Planck Institute for Molecular Biomedicine, Sequencing Core Facility, D-48149, Münster, Germany
| | - Kai Kruse
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany
- Max Planck Institute for Molecular Biomedicine, Bioinformatics Service Unit, D-48149, Münster, Germany
| | - Richard Stange
- Department of Regenerative Musculoskeletal Medicine, Institute of Musculoskeletal Medicine, University Hospital Münster, D-48149, Münster, Germany
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and University of Münster, Faculty of Medicine, D-48149, Münster, Germany.
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11
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Nishida S, Azetsu Y, Chatani M, Karakawa A, Otake K, Sugiki H, Sakai N, Maruoka Y, Myers M, Takami M. Tacrolimus, FK506, promotes bone formation in bone defect mouse model. J Oral Biosci 2024; 66:391-402. [PMID: 38360372 DOI: 10.1016/j.job.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/17/2024]
Abstract
OBJECTIVES Some studies have reported that tacrolimus (FK506), an immunosuppressant, may have positive effects on bone formation. However, the precise effects of FK506 on bone repair or osteoblasts remain inadequately elucidated, and limited research has explored the outcomes of its use in an in vivo mouse model. This study aims to examine the effects of FK506 on bone repair and osteoblast functions using bone defect and BMP-2-induced ectopic ossification mouse models, as well as cultured primary mouse osteoblasts treated with FK506. METHODS We established mouse models of femur bone defect and BMP-2-induced ectopic ossification to evaluate the effect of FK506 on new bone formation, respectively. Additionally, primary mouse osteoblasts were cultured with FK506 and examined for gene expressions related to osteoblast differentiation. RESULTS While FK506 promoted the repair of bone defect areas in the femur of the bone defect mouse model, it also led to widespread abnormal bone formation outside the intended area. Additionally, following the implantation of a collagen sponge containing BMP-2 into mouse muscle tissue, FK506 was found to promote ectopic ossification and enhance BMP-2-induced osteoblast differentiation in vitro. Our findings also revealed that FK506 increased the number of immature osteoblasts in the absence of BMP-2 without affecting osteoblast differentiation. Furthermore, direct effects were observed, reducing the ability of osteoblasts to support osteoclastogenesis. CONCLUSIONS These results indicate that FK506 increases new bone formation during bone repair and influences the proliferation of immature osteoblasts, as well as osteoblast-supported osteoclastogenesis.
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Affiliation(s)
- Satoko Nishida
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Department of Medical and Dental Cooperative Dentistry, Graduate School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ota, Tokyo, 145-8515, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Yuki Azetsu
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Masahiro Chatani
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Akiko Karakawa
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Kai Otake
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Department of Endodontology, Graduate School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ota, Tokyo, 145-8515, Japan
| | - Hidemitsu Sugiki
- Department of Pharmacology, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Nobuhiro Sakai
- Department of Dental Education, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Yasubumi Maruoka
- Totsuka Kyoritsu Daini Hospital, 579-1 Totsuka, Yokohama, Kanagawa, 244-0817, Japan
| | - Mie Myers
- Department of Medical and Dental Cooperative Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ota, Tokyo, 145-8515, Japan
| | - Masamichi Takami
- Department of Pharmacology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan.
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12
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Cheng S, Hu X, Sun K, Huang Z, Zhao Y, Sun Y, Zeng B, Wang J, Zhao D, Lu S, Shi Q, Wang Y, Zhang W, Liu X, Shu B. Local Application of Tanshinone IIA protects mesenchymal stem cells from apoptosis and promotes fracture healing in ovariectomized mice. J Orthop Surg Res 2024; 19:309. [PMID: 38783358 PMCID: PMC11112815 DOI: 10.1186/s13018-024-04793-x] [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: 04/08/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Elderly patients suffering from osteoporotic fractures are more susceptible to delayed union or nonunion, and their bodies then are in a state of low-grade chronic inflammation with decreased antioxidant capacity. Tanshinone IIA is widely used in treating cardiovascular and cerebrovascular diseases in China and has anti-inflammatory and antioxidant effects. We aimed to observe the antioxidant effects of Tanshinone IIA on mesenchymal stem cells (MSCs), which play important roles in bone repair, and the effects of local application of Tanshinone IIA using an injectable biodegradable hydrogel on osteoporotic fracture healing. METHODS MSCs were pretreated with or without different concentrations of Tanshinone IIA followed by H2O2 treatment. Ovariectomized (OVX) C57BL/6 mice received a mid-shaft transverse osteotomy fracture on the left tibia, and Tanshinone IIA was applied to the fracture site using an injectable hydrogel. RESULTS Tanshinone IIA pretreatment promoted the expression of nuclear factor erythroid 2-related factor 2 and antioxidant enzymes, and inhibited H2O2-induced reactive oxygen species accumulation in MSCs. Furthermore, Tanshinone IIA reversed H2O2-induced apoptosis and decrease in osteogenic differentiation in MSCs. After 4 weeks of treatment with Tanshinone IIA in OVX mice, the bone mineral density of the callus was significantly increased and the biomechanical properties of the healed tibias were improved. Cell apoptosis was decreased and Nrf2 expression was increased in the early stage of callus formation. CONCLUSIONS Taken together, these results indicate that Tanshinone IIA can activate antioxidant enzymes to protect MSCs from H2O2-induced cell apoptosis and osteogenic differentiation inhibition. Local application of Tanshinone IIA accelerates fracture healing in ovariectomized mice.
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Affiliation(s)
- Shao Cheng
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
- School of Orthopedics, Henan University of Chinese Medicine, Zhengzhou, 450002, China
| | - Xiaohui Hu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Kanghui Sun
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Ziyu Huang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Yongjian Zhao
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Yueli Sun
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Bo Zeng
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Jing Wang
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Dongfeng Zhao
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Sheng Lu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Qi Shi
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Yongjun Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China
| | - Weian Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xinhua Liu
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Bing Shu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China.
- Spine Institute, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200032, China.
- Key Laboratory, Ministry of Education of China, Shanghai, 200032, China.
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13
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Chen S, Liang B, Xu J. Unveiling heterogeneity in MSCs: exploring marker-based strategies for defining MSC subpopulations. J Transl Med 2024; 22:459. [PMID: 38750573 PMCID: PMC11094970 DOI: 10.1186/s12967-024-05294-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 05/11/2024] [Indexed: 05/19/2024] Open
Abstract
Mesenchymal stem/stromal cells (MSCs) represent a heterogeneous cell population distributed throughout various tissues, demonstrating remarkable adaptability to microenvironmental cues and holding immense promise for disease treatment. However, the inherent diversity within MSCs often leads to variability in therapeutic outcomes, posing challenges for clinical applications. To address this heterogeneity, purification of MSC subpopulations through marker-based isolation has emerged as a promising approach to ensure consistent therapeutic efficacy. In this review, we discussed the reported markers of MSCs, encompassing those developed through candidate marker strategies and high-throughput approaches, with the aim of explore viable strategies for addressing the heterogeneity of MSCs and illuminate prospective research directions in this field.
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Affiliation(s)
- Si Chen
- Shenzhen University Medical School, Shenzhen University, Shenzhen, 518000, People's Republic of China
| | - Bowei Liang
- Shenzhen University Medical School, Shenzhen University, Shenzhen, 518000, People's Republic of China
| | - Jianyong Xu
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Guangdong Engineering Technology Research Center of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Obstetrics & Gynecology Hospital (formerly Shenzhen Zhongshan Urology Hospital), Fuqiang Avenue 1001, Shenzhen, 518060, Guangdong, People's Republic of China.
- Guangdong Engineering Technology Research Center of Reproductive Immunology for Peri-Implantation, Shenzhen, 518000, People's Republic of China.
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14
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Liao Z, Zheng X, Li H, Deng Z, Feng S, Tan H, Zhao L. Carboxypeptidase M modulates BMSCs osteogenesis-adipogenesis via the MAPK/ERK pathway: An integrated single-cell and bulk transcriptomic study. FASEB J 2024; 38:e23657. [PMID: 38713087 DOI: 10.1096/fj.202302508r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 04/16/2024] [Accepted: 04/25/2024] [Indexed: 05/08/2024]
Abstract
The pathogenesis of osteoporosis (OP) is closely associated with the disrupted balance between osteogenesis and adipogenesis in bone marrow-derived mesenchymal stem cells (BMSCs). We analyzed published single-cell RNA sequencing (scRNA-seq) data to dissect the transcriptomic profiles of bone marrow-derived cells in OP, reviewing 56 377 cells across eight scRNA-seq datasets from femoral heads (osteoporosis or osteopenia n = 5, osteoarthritis n = 3). Seventeen genes, including carboxypeptidase M (CPM), were identified as key osteogenesis-adipogenesis regulators through comprehensive gene set enrichment, differential expression, regulon activity, and pseudotime analyses. In vitro, CPM knockdown reduced osteogenesis and promoted adipogenesis in BMSCs, while adenovirus-mediated CPM overexpression had the reverse effects. In vivo, intraosseous injection of CPM-overexpressing BMSCs mitigated bone loss in ovariectomized mice. Integrated scRNA-seq and bulk RNA sequencing analyses provided insight into the MAPK/ERK pathway's role in the CPM-mediated regulation of BMSC osteogenesis and adipogenesis; specifically, CPM overexpression enhanced MAPK/ERK signaling and osteogenesis. In contrast, the ERK1/2 inhibitor binimetinib negated the effects of CPM overexpression. Overall, our findings identify CPM as a pivotal regulator of BMSC differentiation, which provides new clues for the mechanistic study of OP.
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Affiliation(s)
- Zheting Liao
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Xiaoyong Zheng
- Orthopaedic Department, The 4th Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Hongfang Li
- Beijing Yijiandian Clinic, Beijing, China
- Health Management Center, Peking University International Hospital, Beijing, China
| | - Zhonghao Deng
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Shuhao Feng
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongbo Tan
- Department of Orthopaedic, The 920th Hospital of Joint Logistics Support Force, Kunming, Yunnan, China
| | - Liang Zhao
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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15
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Liu YL, Tang XT, Shu HS, Zou W, Zhou BO. Fibrous periosteum repairs bone fracture and maintains the healed bone throughout mouse adulthood. Dev Cell 2024; 59:1192-1209.e6. [PMID: 38554700 DOI: 10.1016/j.devcel.2024.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 12/07/2023] [Accepted: 03/06/2024] [Indexed: 04/02/2024]
Abstract
Bone is regarded as one of few tissues that heals without fibrous scar. The outer layer of the periosteum is covered with fibrous tissue, whose function in bone formation is unknown. We herein developed a system to distinguish the fate of fibrous-layer periosteal cells (FL-PCs) from the skeletal stem/progenitor cells (SSPCs) in the cambium-layer periosteum and bone marrow in mice. We showed that FL-PCs did not participate in steady-state osteogenesis, but formed the main body of fibrocartilaginous callus during fracture healing. Moreover, FL-PCs invaded the cambium-layer periosteum and bone marrow after fracture, forming neo-SSPCs that continued to maintain the healed bones throughout adulthood. The FL-PC-derived neo-SSPCs expressed lower levels of osteogenic signature genes and displayed lower osteogenic differentiation activity than the preexisting SSPCs. Consistent with this, healed bones were thinner and formed more slowly than normal bones. Thus, the fibrous periosteum becomes the cellular origin of bones after fracture and alters bone properties permanently.
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Affiliation(s)
- Yiming Liam Liu
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Xinyu Thomas Tang
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Hui Sophie Shu
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Weiguo Zou
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China; Key Laboratory of RNA Science and Engineering, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China.
| | - Bo O Zhou
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, Tianjin 300020, China.
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16
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Nookaew I, Xiong J, Onal M, Bustamante-Gomez C, Wanchai V, Fu Q, Kim HN, Almeida M, O'Brien CA. Refining the identity of mesenchymal cell types associated with murine periosteal and endosteal bone. J Biol Chem 2024; 300:107158. [PMID: 38479598 PMCID: PMC11007436 DOI: 10.1016/j.jbc.2024.107158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/24/2024] [Accepted: 03/05/2024] [Indexed: 03/26/2024] Open
Abstract
Single-cell RNA-seq has led to novel designations for mesenchymal cells associated with bone as well as multiple designations for what appear to be the same cell type. The main goals of this study were to increase the amount of single-cell RNA sequence data for osteoblasts and osteocytes, to compare cells from the periosteum to those inside bone, and to clarify the major categories of cell types associated with murine bone. We created an atlas of murine bone-associated cells by harmonizing published datasets with in-house data from cells targeted by Osx1-Cre and Dmp1-Cre driver strains. Cells from periosteal bone were analyzed separately from those isolated from the endosteum and trabecular bone. Over 100,000 mesenchymal cells were mapped to reveal 11 major clusters designated fibro-1, fibro-2, chondrocytes, articular chondrocytes, tenocytes, adipo-Cxcl12 abundant reticular (CAR), osteo-CAR, preosteoblasts, osteoblasts, osteocytes, and osteo-X, the latter defined in part by periostin expression. Osteo-X, osteo-CAR, and preosteoblasts were closely associated with osteoblasts at the trabecular bone surface. Wnt16 was expressed in multiple cell types from the periosteum but not in cells from endocortical or cancellous bone. Fibro-2 cells, which express markers of stem cells, localized to the periosteum but not trabecular bone in adult mice. Suppressing bone remodeling eliminated osteoblasts and altered gene expression in preosteoblasts but did not change the abundance or location of osteo-X or osteo-CAR cells. These results provide a framework for identifying bone cell types in murine single-cell RNA-seq datasets and suggest that osteoblast progenitors reside near the surface of remodeling bone.
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Affiliation(s)
- Intawat Nookaew
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Department of Biomedical Informatics, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
| | - Jinhu Xiong
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Department of Orthopaedic Surgery, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Melda Onal
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Department of Physiology and Cell Biology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Cecile Bustamante-Gomez
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Division of Endocrinology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Visanu Wanchai
- Department of Biomedical Informatics, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Qiang Fu
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Division of Endocrinology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Ha-Neui Kim
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Division of Endocrinology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Maria Almeida
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Department of Orthopaedic Surgery, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Division of Endocrinology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Charles A O'Brien
- Center for Musculoskeletal Disease Research, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Department of Orthopaedic Surgery, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Division of Endocrinology, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA.
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17
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Han Q, He J, Bai L, Huang Y, Chen B, Li Z, Xu M, Liu Q, Wang S, Wen N, Zhang J, Guo B, Yin Z. Injectable Bioadhesive Photocrosslinkable Hydrogels with Sustained Release of Kartogenin to Promote Chondrogenic Differentiation and Partial-Thickness Cartilage Defects Repair. Adv Healthc Mater 2024; 13:e2303255. [PMID: 38253413 DOI: 10.1002/adhm.202303255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/05/2024] [Indexed: 01/24/2024]
Abstract
Partial-thickness cartilage defect (PTCD) is a common and formidable clinical challenge without effective therapeutic approaches. The inherent anti-adhesive characteristics of the extracellular matrix within cartilage pose a significant impediment to the integration of cells or biomaterials with the native cartilage during cartilage repair. Here, an injectable photocrosslinked bioadhesive hydrogel, consisting of gelatin methacryloyl (GM), acryloyl-6-aminocaproic acid-g-N-hydroxysuccinimide (AN), and poly(lactic-co-glycolic acid) microspheres loaded with kartogenin (KGN) (abbreviated as GM/AN/KGN hydrogel), is designed to enhance interfacial integration and repair of PTCD. After injected in situ at the irregular defect, a stable and robust hydrogel network is rapidly formed by ultraviolet irradiation, and it can be quickly and tightly adhered to native cartilage through amide bonds. The hydrogel exhibits good adhesion strength up to 27.25 ± 1.22 kPa by lap shear strength experiments. The GM/AN/KGN hydrogel demonstrates good adhesion, low swelling, resistance to fatigue, biocompatibility, and chondrogenesis properties in vitro. A rat model with PTCD exhibits restoration of a smoother surface, stable seamless integration, and abundant aggrecan and type II collagen production. The injectable stable adhesive hydrogel with long-term chondrogenic differentiation capacity shows great potential to facilitate repair of PTCD.
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Affiliation(s)
- Qian Han
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, and State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jiahui He
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, and State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Lang Bai
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Ying Huang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, and State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Baojun Chen
- Department of Surgery of Spine and Spinal Cord, Henan Provincial People's Hospital, Zhengzhou, 450003, China
| | - Zhenlong Li
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, and State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Meiguang Xu
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Qiaonan Liu
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Shuai Wang
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Nuanyang Wen
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Jing Zhang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. School of Medicine, Northwest University, Xi'an, 710069, China
| | - Baolin Guo
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, and State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zhanhai Yin
- Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
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18
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Polat S, Yazir Y, Duruksu G, Kiliç KC, Mert S, Gacar G, Öncel Duman B, Halbutoğullari ZS. Investigation of the differentiation potential of pericyte cells as an alternative source of mesenchymal stem cells. Acta Histochem 2024; 126:152145. [PMID: 38432161 DOI: 10.1016/j.acthis.2024.152145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/13/2024] [Accepted: 02/14/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND The mesenchymal stem cells (MSCs) with characterized by their multipotency and capacity to differentiate into various tissue cell types, have led to their incorporation in regenerative medicine research. However, the limited numbers of MSCs in the human body and their diverse differentiation capabilities in tissues highlight the need for exploring alternative regenerative cell sources. In this study, therefore, we conducted molecular level examinations to determine whether pericytes, specialized cell communities situated near blood vessels, could serve as a substitute for human bone marrow-derived mesenchymal stem cells (hBM-MSCs). In this context, the potential application of pericytes surrounds the vessels when MSCs are insufficient for functional purposes. METHODS The pericytes utilized in this investigation were derived from the placenta and characterized at the third passage. Similarly, the hBM-MSCs were also characterized at the third passage. The pluripotent properties of the two cell types were assessed at the gene expression level. Thereafter, both pericytes and hBM-MSCs were directed towards adipogenic, osteogenic and chondrogenic differentiation. The cells in both groups were examined on days 7, 14, and, 21 and their differentiation status was compared both immunohistochemically and through gene expression analysis. RESULTS Upon comparing the pluripotency characteristics of placental pericytes and hBM-MSCs, it was discovered that there was a substantial upregulation of the pluripotency genes FoxD3, Sox2, ZPF42, UTF1, and, Lin28 in both cell types. However, no significant expression of the genes Msx1, Nr6a1, Pdx1, and, GATA6 was observed in either cell type. It was also noted that pericytes differentiate into adipogenic, osteogenic and, chondrogenic lineages similar to hBM-MSCs. DISCUSSION As a result, it has been determined that pericytes exhibit high differentiation and proliferation properties similar to those of MSCs, and therefore can be considered a suitable alternative cell source for regenerative medicine and tissue engineering research, in cases where MSCs are not available or insufficient. It is notable that pericytes have been suggested as a potential substitute in studies where MSCs are lacking.
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Affiliation(s)
- Selen Polat
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey
| | - Yusufhan Yazir
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey; Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey; Department of Histology and Embryology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey.
| | - Gökhan Duruksu
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey; Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey
| | - Kamil Can Kiliç
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey
| | - Serap Mert
- Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey; Department of Chemistry and Chemical Processing Technologies, Kocaeli University, Kocaeli, Turkey; Department of Polymer Science and Technology, Kocaeli University, Kocaeli, Turkey
| | - Gülçin Gacar
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey; Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey
| | - Büşra Öncel Duman
- Medical Laboratory Techniques Program, European Vocational School, Kocaeli Health and Technology University, Kocaeli, Turkey
| | - Zehra Seda Halbutoğullari
- Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey; Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey; Department of Medical Biology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
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19
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Yang D, Jeong Y, Ortinau L, Solidum J, Park D. Mx1 -labeled pulp progenitor cells are main contributors to postnatal odontoblasts and pulp cells in murine molars. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.21.586156. [PMID: 38585950 PMCID: PMC10996506 DOI: 10.1101/2024.03.21.586156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Regeneration of dentin and odontoblasts from dental pulp stem cells (DPSCs) is essential for permanent tooth maintenance. However, the in vivo identity and role of endogenous DPSCs in reparative dentinogenesis are elusive. Here, using pulp single-cell analysis before and after molar eruption, we revealed that endogenous DPSCs are enriched in Cxcl12- GFP + coronal papilla-like cells with Mx1- Cre labeling. These Mx1 + Cxcl12- GFP + cells are long-term repopulating cells that contribute to the majority of pulp cells and new odontoblasts after eruption. Upon molar injury, Mx1 + DPSCs localize into the injury site and differentiate into new odontoblasts, forming scleraxis -GFP + and osteocalcin -GFP + dentinal tubules and reparative dentin. Single-cell and FACS analysis showed that Mx1 + Cxcl12- GFP + DPSCs are the most primitive cells with stem cell marker expression and odontoblast differentiation. Taken together, our findings demonstrate that Mx1 labels postnatal DSPCs, which are the main source of pulp cells and new odontoblasts with reparative dentinogenesis in vivo .
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20
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Kan C, Tan Z, Liu L, Liu B, Zhan L, Zhu J, Li X, Lin K, Liu J, Liu Y, Yang F, Wong M, Wang S, Zheng H. Phase separation of SHP2E76K promotes malignant transformation of mesenchymal stem cells by activating mitochondrial complexes. JCI Insight 2024; 9:e170340. [PMID: 38451719 PMCID: PMC11141883 DOI: 10.1172/jci.insight.170340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 03/05/2024] [Indexed: 03/09/2024] Open
Abstract
Mesenchymal stem cells (MSCs), suffering from diverse gene hits, undergo malignant transformation and aberrant osteochondral differentiation. Src homology region 2-containing protein tyrosine phosphatase 2 (SHP2), a nonreceptor protein tyrosine phosphatase, regulates multicellular differentiation, proliferation, and transformation. However, the role of SHP2 in MSC fate determination remains unclear. Here, we showed that MSCs bearing the activating SHP2E76K mutation underwent malignant transformation into sarcoma stem-like cells. We revealed that the SHP2E76K mutation in mouse MSCs led to hyperactive mitochondrial metabolism by activating mitochondrial complexes I and III. Inhibition of complexes I and III prevented hyperactive mitochondrial metabolism and malignant transformation of SHP2E76K MSCs. Mechanistically, we verified that SHP2 underwent liquid-liquid phase separation (LLPS) in SHP2E76K MSCs. SHP2 LLPS led to its dissociation from complexes I and III, causing their hyperactivation. Blockade of SHP2 LLPS by LLPS-defective mutations or allosteric inhibitors suppressed complex I and III hyperactivation as well as malignant transformation of SHP2E76K MSCs. These findings reveal that complex I and III hyperactivation driven by SHP2 LLPS promotes malignant transformation of SHP2E76K MSCs and suggest that inhibition of SHP2 LLPS could be a potential therapeutic target for the treatment of activated SHP2-associated cancers.
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Affiliation(s)
- Chen Kan
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Zhenya Tan
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Liwei Liu
- Department of Pathogen Biology and Immunology, School of Medical Technology, Anhui Medical College, Hefei, China
| | - Bo Liu
- Department of Cell Center, 901st Hospital of PLA Joint Logistic Support Force, Anhui, Hefei, China
| | - Li Zhan
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Jicheng Zhu
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Xiaofei Li
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Keqiong Lin
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Jia Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Yakun Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Fan Yang
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Mandy Wong
- Department of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Siying Wang
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
| | - Hong Zheng
- Department of Pathophysiology, School of Basic Medical Sciences, Stem Cell Regeneration Research Center, Anhui Medical University, Hefei, China
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21
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Ma C, Zhang Y, Cao Y, Hu CH, Zheng CX, Jin Y, Sui BD. Autonomic neural regulation in mediating the brain-bone axis: mechanisms and implications for regeneration under psychological stress. QJM 2024; 117:95-108. [PMID: 37252831 DOI: 10.1093/qjmed/hcad108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Indexed: 06/01/2023] Open
Abstract
Efficient regeneration of bone defects caused by disease or significant trauma is a major challenge in current medicine, which is particularly difficult yet significant under the emerging psychological stress in the modern society. Notably, the brain-bone axis has been proposed as a prominent new concept in recent years, among which autonomic nerves act as an essential and emerging skeletal pathophysiological factor related to psychological stress. Studies have established that sympathetic cues lead to impairment of bone homeostasis mainly through acting on mesenchymal stem cells (MSCs) and their derivatives with also affecting the hematopoietic stem cell (HSC)-lineage osteoclasts, and the autonomic neural regulation of stem cell lineages in bone is increasingly recognized to contribute to the bone degenerative disease, osteoporosis. This review summarizes the distribution characteristics of autonomic nerves in bone, introduces the regulatory effects and mechanisms of autonomic nerves on MSC and HSC lineages, and expounds the crucial role of autonomic neural regulation on bone physiology and pathology, which acts as a bridge between the brain and the bone. With the translational perspective, we further highlight the autonomic neural basis of psychological stress-induced bone loss and a series of pharmaceutical therapeutic strategies and implications toward bone regeneration. The summary of research progress in this field will add knowledge to the current landscape of inter-organ crosstalk and provide a medicinal basis for the achievement of clinical bone regeneration in the future.
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Affiliation(s)
- C Ma
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Y Zhang
- Department of Medical Rehabilitation, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Y Cao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - C-H Hu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
- Xi'an Institute of Tissue Engineering and Regenerative Medicine, Xi'an, Shaanxi 710032, China
| | - C-X Zheng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Y Jin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
- Xi'an Institute of Tissue Engineering and Regenerative Medicine, Xi'an, Shaanxi 710032, China
| | - B-D Sui
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
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22
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Srinivasan D, Arostegui M, Goebel EJ, Hart KN, Aykul S, Lees-Shepard JB, Idone V, Hatsell SJ, Economides AN. How Activin A Became a Therapeutic Target in Fibrodysplasia Ossificans Progressiva. Biomolecules 2024; 14:101. [PMID: 38254701 PMCID: PMC10813747 DOI: 10.3390/biom14010101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disorder characterized by episodic yet cumulative heterotopic ossification (HO) of skeletal muscles, tendons, ligaments, and fascia. FOP arises from missense mutations in Activin Receptor type I (ACVR1), a type I bone morphogenetic protein (BMP) receptor. Although initial findings implicated constitutive activity of FOP-variant ACVR1 (ACVR1FOP) and/or hyperactivation by BMPs, it was later shown that HO in FOP requires activation of ACVR1FOP by Activin A. Inhibition of Activin A completely prevents HO in FOP mice, indicating that Activin A is an obligate driver of HO in FOP, and excluding a key role for BMPs in this process. This discovery led to the clinical development of garetosmab, an investigational antibody that blocks Activin A. In a phase 2 trial, garetosmab inhibited new heterotopic bone lesion formation in FOP patients. In contrast, antibodies to ACVR1 activate ACVR1FOP and promote HO in FOP mice. Beyond their potential clinical relevance, these findings have enhanced our understanding of FOP's pathophysiology, leading to the identification of fibroadipogenic progenitors as the cells that form HO, and the discovery of non-signaling complexes between Activin A and wild type ACVR1 and their role in tempering HO, and are also starting to inform biological processes beyond FOP.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Aris N. Economides
- Regeneron Pharmaceuticals, Inc., Tarrytown, NY 10591, USA; (D.S.); (M.A.); (E.J.G.); (K.N.H.); (S.A.); (J.B.L.-S.); (V.I.); (S.J.H.)
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23
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Steppe L, Megafu M, Tschaffon-Müller ME, Ignatius A, Haffner-Luntzer M. Fracture healing research: Recent insights. Bone Rep 2023; 19:101686. [PMID: 38163010 PMCID: PMC10757288 DOI: 10.1016/j.bonr.2023.101686] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 01/03/2024] Open
Abstract
Bone has the rare capability of scarless regeneration that enables the complete restoration of the injured bone area. In recent decades, promising new technologies have emerged from basic, translational and clinical research for fracture treatment; however, 5-10 % of all bone fractures still fail to heal successfully or heal in a delayed manner. Several comorbidities and risk factors have been identified which impair bone healing and might lead to delayed bone union or non-union. Therefore, a considerable amount of research has been conducted to elucidate molecular mechanisms of successful and delayed fracture healing to gain further insights into this complex process. One focus of recent research is to investigate the complex interactions of different cell types and the action of progenitor cells during the healing process. Of particular interest is also the identification of patient-specific comorbidities and how these affect fracture healing. In this review, we discuss the recent knowledge about progenitor cells for long bone repair and the influence of comorbidities such as diabetes, postmenopausal osteoporosis, and chronic stress on the healing process. The topic selection for this review was made based on the presented studies at the 2022 annual meeting of the European Calcified Tissue Society (ECTS) in Helsinki.
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Affiliation(s)
- Lena Steppe
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Germany
| | - Michael Megafu
- A.T. Still University Kirksville College of Osteopathic Medicine, USA
| | | | - Anita Ignatius
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Germany
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24
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Nookaew I, Xiong J, Onal M, Bustamante-Gomez C, Wanchai V, Fu Q, Kim HN, Almeida M, O'Brien CA. A framework for defining mesenchymal cell types associated with murine periosteal and endosteal bone. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.17.567528. [PMID: 38014179 PMCID: PMC10680810 DOI: 10.1101/2023.11.17.567528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Single-cell RNA sequencing has led to numerous novel designations for mesenchymal cell types associated with bone. Consequently, there are now multiple designations for what appear to be the same cell type. In addition, existing datasets contain relatively small numbers of mature osteoblasts and osteocytes and there has been no comparison of periosteal bone cells to those at the endosteum and trabecular bone. The main goals of this study were to increase the amount of single cell RNA sequence data for osteoblasts and osteocytes, to compare cells from the periosteum to those inside bone, and to clarify the major categories of cell types associated with murine bone. To do this, we created an atlas of murine bone-associated cells by harmonizing published datasets with in-house data from cells targeted by Osx1-Cre and Dmp1-Cre driver strains. Cells from periosteal bone were analyzed separately from those isolated from the endosteum and trabecular bone. Over 100,000 mesenchymal cells were mapped to reveal 11 major clusters designated fibro-1, fibro-2, chondrocytes, articular chondrocytes, tenocytes, adipo-CAR, osteo-CAR, pre-osteoblasts, osteoblasts, osteocytes, and osteo-X, the latter defined in part by Postn expression. Osteo-X, osteo-CAR, and pre-osteoblasts were closely associated with osteoblasts at the trabecular bone surface. Wnt16 was expressed in multiple cell types from the periosteum but not in any cells from endocortical or cancellous bone. Fibro-2 cells, which express markers of skeletal stem cells, localized to the periosteum but not trabecular bone in adult mice. Suppressing bone remodeling eliminated osteoblasts and altered gene expression in pre-osteoblasts but did not change the abundance or location of osteo-X or osteo-CAR cells. These results provide a framework for identifying bone cell types in murine single cell RNA sequencing datasets and suggest that osteoblast progenitors reside near the surface of remodeling bone.
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Affiliation(s)
- Intawat Nookaew
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Department of Biomedical Informatics, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Jinhu Xiong
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Department of Orthopaedic Surgery, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Melda Onal
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Department of Physiology and Cell Biology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Cecile Bustamante-Gomez
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Division of Endocrinology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Visanu Wanchai
- Department of Biomedical Informatics, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Qiang Fu
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Division of Endocrinology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Ha-Neui Kim
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Division of Endocrinology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Maria Almeida
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Department of Orthopaedic Surgery, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Division of Endocrinology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Charles A O'Brien
- Center for Musculoskeletal Disease Research, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Department of Orthopaedic Surgery, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Division of Endocrinology, the University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, United States of America
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25
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Kfoury YS, Ji F, Jain E, Mazzola M, Schiroli G, Papazian A, Mercier F, Sykes DB, Kiem A, Randolph M, Calvi LM, Abdel-Wahab O, Sadreyev RI, Scadden DT. The bone marrow stroma in human myelodysplastic syndrome reveals alterations that regulate disease progression. Blood Adv 2023; 7:6608-6623. [PMID: 37450380 PMCID: PMC10628805 DOI: 10.1182/bloodadvances.2022008268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 06/14/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023] Open
Abstract
Myelodysplastic syndromes (MDSs) are a heterogenous group of diseases affecting the hematopoietic stem cell that are curable only by stem cell transplantation. Both hematopoietic cell intrinsic changes and extrinsic signals from the bone marrow (BM) niche seem to ultimately lead to MDS. Animal models of MDS indicate that alterations in specific mesenchymal progenitor subsets in the BM microenvironment can induce or select for abnormal hematopoietic cells. Here, we identify a subset of human BM mesenchymal cells marked by the expression of CD271, CD146, and CD106. This subset of human mesenchymal cells is comparable with mouse mesenchymal cells that, when perturbed, result in an MDS-like syndrome. Its transcriptional analysis identified Osteopontin (SPP1) as the most overexpressed gene. Selective depletion of Spp1 in the microenvironment of the mouse MDS model, Vav-driven Nup98-HoxD13, resulted in an accelerated progression as demonstrated by increased chimerism, higher mutant myeloid cell burden, and a more pronounced anemia when compared with that in wild-type microenvironment controls. These data indicate that molecular perturbations can occur in specific BM mesenchymal subsets of patients with MDS. However, the niche adaptations to dysplastic clones include Spp1 overexpression that can constrain disease fitness and potentially progression. Therefore, niche changes with malignant disease can also serve to protect the host.
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Affiliation(s)
- Youmna S. Kfoury
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Fei Ji
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA
- Department of Genetics, Harvard Medical School, Boston, MA
| | - Esha Jain
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA
- Department of Genetics, Harvard Medical School, Boston, MA
| | - Michael Mazzola
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Giulia Schiroli
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Ani Papazian
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Francois Mercier
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - David B. Sykes
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Anna Kiem
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
| | - Mark Randolph
- Division of Plastic and Reconstructive surgery, Massachusetts General Hospital, Boston, MA
| | - Laura M. Calvi
- Department of Medicine, University of Rochester School of Medicine, Rochester, NY
| | - Omar Abdel-Wahab
- Department of Medicine, Leukemia Service, Memorial Sloan Kettering Cancer Center, New York, NY
- Department of Medicine, Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Ruslan I. Sadreyev
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - David T. Scadden
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA
- Harvard Stem Cell Institute, Cambridge, MA
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA
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26
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Li M, Shi X, Wu Y, Qi B, Zhang C, Wang B, Zhang B, Xu Y. Pmepa1 knockdown alleviates SpA-induced pyroptosis and osteogenic differentiation inhibition of hBMSCs via p38MAPK/NLRP3 axis. Int Immunopharmacol 2023; 124:110843. [PMID: 37634444 DOI: 10.1016/j.intimp.2023.110843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 08/12/2023] [Accepted: 08/20/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND Osteomyelitis is a refractory bone infectious disease, which usually results in progressive bone destruction and bone loss. The invasion of pathogens and subsequent inflammatory response could damage bone marrow mesenchymal stem cells (BMSCs) and inhibit osteogenic differentiation, and finally aggravate uncontrolled bone remodeling in osteomyelitis by affecting bone formation. Exploring the mechanisms of BMSCs injury and osteogenic differentiation inhibition may would help us to find potential therapeutic targets. METHOD Firstly, staphylococcal protein A (SpA)-treated human bone marrow mesenchymal stem cells (hBMSCs) were used to construct cell models of osteomyelitis. Secondly, transcriptome sequencing was performed to screen differentially expressed genes and then verified the expression of target genes. Next, in vitro experiments were conducted to explore the functions and mechanisms of prostate transmembrane protein androgen induced 1 (Pmepa1) in SpA-treated hBMSCs. Finally, the rat model of osteomyelitis was established to provide an auxiliary validation of the in vitro experimental results. RESULTS We found that SpA treatment induced inflammatory injury and inhibited osteogenic differentiation in hBMSCs, then the transcriptome sequencing and further detection results showed that Pmepa1 was significantly upregulated in this process. Functionally, Pmepa1 knockdown alleviated inflammatory injury and promoted osteogenic differentiation in SpA-treated hBMSCs. Among them, it was demonstrated that Pmepa1 knockdown exerted cytoprotective effects by alleviating pyroptosis of SpA-infected hBMSCs. Furthermore, recovery experiments revealed that Pmepa1 knockdown reversed SpA-mediated adverse effects by downregulating the p38MAPK/NLRP3 axis. Finally, the detection results of rat femoral osteomyelitis showed that the expression of Pmepa1 was up-regulated, and the expression trends of other indicators including p38MAPK, NLRP3, and caspase-1 were also consistent with the in vitro model. CONCLUSION Pmepa1 knockdown alleviates SpA-induced pyroptosis and inhibition of osteogenic differentiation in hBMSCs by downregulating p38MAPK/NLRP3 signaling axis. Modulating the expression of Pmepa1 may be a potential strategy to ameliorate osteomyelitis.
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Affiliation(s)
- Mingjun Li
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Xiangwen Shi
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yipeng Wu
- Department of Orthopedic Surgery, 920th Hospital of Joint Logistics Support Force, Kunming, China
| | - Baochuang Qi
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Chaoqun Zhang
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Bin Wang
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Bihuan Zhang
- Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yongqing Xu
- Department of Orthopedic Surgery, 920th Hospital of Joint Logistics Support Force, Kunming, China.
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27
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Rosen CJ, Horowitz MC. Nutrient regulation of bone marrow adipose tissue: skeletal implications of weight loss. Nat Rev Endocrinol 2023; 19:626-638. [PMID: 37587198 PMCID: PMC10592027 DOI: 10.1038/s41574-023-00879-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/19/2023] [Indexed: 08/18/2023]
Abstract
Adipose tissue is a dynamic component of the bone marrow, regulating skeletal remodelling and secreting paracrine and endocrine factors that can affect haematopoiesis, as well as potentially nourishing the bone marrow during periods of stress. Bone marrow adipose tissue is regulated by multiple factors, but particularly nutrient status. In this Review, we examine how bone marrow adipocytes originate, their function in normal and pathological states and how bone marrow adipose tissue modulates whole-body homoeostasis through actions on bone cells, haematopoietic stem cells and extra-medullary adipocytes during nutritional challenges. We focus on both rodent models and human studies to help understand the unique marrow adipocyte, its response to the external nutrient environment and its effects on the skeleton. We finish by addressing some critical questions that to date remain unanswered.
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Affiliation(s)
| | - Mark C Horowitz
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA.
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28
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Boyce BF, Li J, Yao Z, Xing L. Nuclear Factor-Kappa B Regulation of Osteoclastogenesis and Osteoblastogenesis. Endocrinol Metab (Seoul) 2023; 38:504-521. [PMID: 37749800 PMCID: PMC10613774 DOI: 10.3803/enm.2023.501] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 07/26/2023] [Accepted: 08/02/2023] [Indexed: 09/27/2023] Open
Abstract
Maintenance of skeletal integrity requires the coordinated activity of multinucleated bone-resorbing osteoclasts and bone-forming osteoblasts. Osteoclasts form resorption lacunae on bone surfaces in response to cytokines by fusion of precursor cells. Osteoblasts are derived from mesenchymal precursors and lay down new bone in resorption lacunae during bone remodeling. Nuclear factorkappa B (NF-κB) signaling regulates osteoclast and osteoblast formation and is activated in osteoclast precursors in response to the essential osteoclastogenic cytokine, receptor activator of NF-κB ligand (RANKL), which can also control osteoblast formation through RANK-RANKL reverse signaling in osteoblast precursors. RANKL and some pro-inflammatory cytokines, including tumor necrosis factor (TNF), activate NF-κB signaling to positively regulate osteoclast formation and functions. However, these cytokines also limit osteoclast and osteoblast formation through NF-κB signaling molecules, including TNF receptor-associated factors (TRAFs). TRAF6 mediates RANKL-induced osteoclast formation through canonical NF-κB signaling. In contrast, TRAF3 limits RANKL- and TNF-induced osteoclast formation, and it restricts transforming growth factor β (TGFβ)-induced inhibition of osteoblast formation in young and adult mice. During aging, neutrophils expressing TGFβ and C-C chemokine receptor type 5 (CCR5) increase in bone marrow of mice in response to increased NF-κB-induced CC motif chemokine ligand 5 (CCL5) expression by mesenchymal progenitor cells and injection of these neutrophils into young mice decreased bone mass. TGFβ causes degradation of TRAF3, resulting in decreased glycogen synthase kinase-3β/β-catenin-mediated osteoblast formation and age-related osteoporosis in mice. The CCR5 inhibitor, maraviroc, prevented accumulation of TGFβ+/CCR5+ neutrophils in bone marrow and increased bone mass by inhibiting bone resorption and increasing bone formation in aged mice. This paper updates current understanding of how NF-κB signaling is involved in the positive and negative regulation of cytokine-mediated osteoclast and osteoblast formation and activation with a focus on the role of TRAF3 signaling, which can be targeted therapeutically to enhance bone mass.
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Affiliation(s)
- Brendan F. Boyce
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA
| | - Jinbo Li
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA
| | - Zhenqiang Yao
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA
| | - Lianping Xing
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA
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29
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Son YJ, Keum C, Kim M, Jeong G, Jin S, Hwang HW, Kim H, Lee K, Jeon H, Kim H, Pahk KJ, Jang HW, Sun JY, Han HS, Lee KH, Ok MR, Kim YC, Jeong Y. Selective Cell-Cell Adhesion Regulation via Cyclic Mechanical Deformation Induced by Ultrafast Nanovibrations. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37751467 DOI: 10.1021/acsami.3c08941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The adoption of dynamic mechanomodulation to regulate cellular behavior is an alternative to the use of chemical drugs, allowing spatiotemporal control. However, cell-selective targeting of mechanical stimuli is challenging due to the lack of strategies with which to convert macroscopic mechanical movements to different cellular responses. Here, we designed a nanoscale vibrating surface that controls cell behavior via selective repetitive cell deformation based on a poroelastic cell model. The vibrating indentations induce repetitive water redistribution in the cells with water redistribution rates faster than the vibrating rate; however, in the opposite case, cells perceive the vibrations as a one-time stimulus. The selective regulation of cell-cell adhesion through adjusting the frequency of nanovibration was demonstrated by suppression of cadherin expression in smooth muscle cells (fast water redistribution rate) with no change in vascular endothelial cells (slow water redistribution rate). This technique may provide a new strategy for cell-type-specific mechanical stimulation.
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Affiliation(s)
- Young Ju Son
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Changjoon Keum
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Minsoo Kim
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Goeen Jeong
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Soyeong Jin
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Hae Won Hwang
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyewon Kim
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Kyungwoo Lee
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hojeong Jeon
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Hojun Kim
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Ki Joo Pahk
- Department of Biomedical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyung-Seop Han
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Kwan Hyi Lee
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Myoung-Ryul Ok
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Yu-Chan Kim
- Center for Biomaterials, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Youngdo Jeong
- Center for Advanced Biomolecular Recognition, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of HY-KIST Bio-convergence, Hanyang University, Seoul 04763, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
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30
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Ghaleh HEG, Vakilzadeh G, Zahiri A, Farzanehpour M. Investigating the potential of oncolytic viruses for cancer treatment via MSC delivery. Cell Commun Signal 2023; 21:228. [PMID: 37667271 PMCID: PMC10478302 DOI: 10.1186/s12964-023-01232-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 07/16/2023] [Indexed: 09/06/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have attracted considerable interest as a promising approach for cancer treatment due to their ability to undergo tumor-trophic migration. MSCs possess the unique ability to selectively migrate to tumors, making them an excellent candidate for targeted delivery of oncolytic viruses (OVs) to treat isolated tumors and metastatic malignancies. OVs have attracted attention as a potential treatment for cancer due to their ability to selectively infect and destroy tumor cells while sparing normal cells. In addition, OVs can induce immunogenic cell death and contain curative transgenes in their genome, making them an attractive candidate for cancer treatment in combination with immunotherapies. In combination with MSCs, OVs can modulate the tumor microenvironment and trigger anti-tumor immune responses, making MSC-releasing OVs a promising approach for cancer treatment. This study reviews researches on the use of MSC-released OVs as a novel method for treating cancer. Video Abstract.
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Affiliation(s)
| | - Gazal Vakilzadeh
- Applied Virology Research Center, Baqiyatallah University of Medical sciences, Tehran, Iran
| | - Ali Zahiri
- Students Research Committee, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mahdieh Farzanehpour
- Applied Virology Research Center, Baqiyatallah University of Medical sciences, Tehran, Iran.
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31
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Yang D, Solidum JGN, Park D. Dental Pulp Stem Cells and Current in vivo Approaches to Study Dental Pulp Stem Cells in Pulp Injury and Regeneration. J Bone Metab 2023; 30:231-244. [PMID: 37718901 PMCID: PMC10509030 DOI: 10.11005/jbm.2023.30.3.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 08/20/2023] [Indexed: 09/19/2023] Open
Abstract
Dental pulp stem cells (DPSCs) have garnered significant interest in dental research for their unique characteristics and potential in tooth development and regeneration. While there were many studies to define their stem cell-like characteristics and osteogenic differentiation functions that are considered ideal candidates for regenerating damaged dental pulp tissue, how endogenous DPSCs respond to dental pulp injury and supply new dentin-forming cells has not been extensively investigated in vivo. Here, we review the recent progress in identity, function, and regulation of endogenous DPSCs and their clinical potential for pulp injury and regeneration. In addition, we discuss current advances in new mouse models, imaging techniques, and its practical uses and limitations in the analysis of DPSCs in pulp injury and regeneration in vivo.
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Affiliation(s)
- Dongwook Yang
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX,
USA
- Center for Skeletal Biology, Baylor College of Medicine, Houston, TX,
USA
| | - Jea Giezl Niedo Solidum
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX,
USA
- Department of Biochemistry & Molecular Biology, College of Medicine, University of the Philippines Manila, Manila,
Philippines
| | - Dongsu Park
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX,
USA
- Center for Skeletal Biology, Baylor College of Medicine, Houston, TX,
USA
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX,
USA
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32
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Toejing P, Sakunrangsit N, Pho-On P, Phetkong C, Leelahavanichkul A, Sridurongrit S, Greenblatt MB, Lotinun S. Accelerated Bone Loss in Transgenic Mice Expressing Constitutively Active TGF-β Receptor Type I. Int J Mol Sci 2023; 24:10797. [PMID: 37445982 DOI: 10.3390/ijms241310797] [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: 04/09/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Transforming growth factor beta (TGF-β) is a key factor mediating the intercellular crosstalk between the hematopoietic stem cells and their microenvironment. Here, we investigated the skeletal phenotype of transgenic mice expressing constitutively active TGF-β receptor type I under the control of Mx1-Cre (Mx1;TβRICA mice). μCT analysis showed decreased cortical thickness, and cancellous bone volume in both femurs and mandibles. Histomorphometric analysis confirmed a decrease in cancellous bone volume due to increased osteoclast number and decreased osteoblast number. Primary osteoblasts showed decreased ALP and mineralization. Constitutive TβRI activation increased osteoclast differentiation. qPCR analysis showed that Tnfsf11/Tnfrsf11b ratio, Ctsk, Sufu, and Csf1 were increased whereas Runx2, Ptch1, and Ptch2 were decreased in Mx1;TβRICA femurs. Interestingly, Gli1, Wnt3a, Sp7, Alpl, Ptch1, Ptch2, and Shh mRNA expression were reduced whereas Tnfsf11/Tnfrsf11b ratio was increased in Mx1;TβRICA mandibles. Similarly, osteoclast-related genes were increased in Mx1;TβRICA osteoclasts whereas osteoblast-related genes were reduced in Mx1;TβRICA osteoblasts. Western blot analysis indicated that SMAD2 and SMAD3 phosphorylation was increased in Mx1;TβRICA osteoblasts, and SMAD3 phosphorylation was increased in Mx1;TβRICA osteoclasts. CTSK was increased while RUNX2 and PTCH1 was decreased in Mx1;TβRICA mice. Microindentation analysis indicated decreased hardness in Mx1;TβRICA mice. Our study indicated that Mx1;TβRICA mice were osteopenic by increasing osteoclast number and decreasing osteoblast number, possibly by suppressing Hedgehog signaling pathways.
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Affiliation(s)
- Parichart Toejing
- Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nithidol Sakunrangsit
- Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Pinyada Pho-On
- Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Chinnatam Phetkong
- Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Asada Leelahavanichkul
- Division of Immunology, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Somyoth Sridurongrit
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10330, Thailand
| | - Matthew B Greenblatt
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine and Research Division, Hospital for Special Surgery, New York, NY 10065, USA
| | - Sutada Lotinun
- Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
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33
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Shen F, Huang X, He G, Shi Y. The emerging studies on mesenchymal progenitors in the long bone. Cell Biosci 2023; 13:105. [PMID: 37301964 DOI: 10.1186/s13578-023-01039-x] [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: 12/29/2022] [Accepted: 05/01/2023] [Indexed: 06/12/2023] Open
Abstract
Mesenchymal progenitors (MPs) are considered to play vital roles in bone development, growth, bone turnover, and repair. In recent years, benefiting from advanced approaches such as single-cell sequence, lineage tracing, flow cytometry, and transplantation, multiple MPs are identified and characterized in several locations of bone, including perichondrium, growth plate, periosteum, endosteum, trabecular bone, and stromal compartment. However, although great discoveries about skeletal stem cells (SSCs) and progenitors are present, it is still largely obscure how the varied landscape of MPs from different residing sites diversely contribute to the further differentiation of osteoblasts, osteocytes, chondrocytes, and other stromal cells in their respective destiny sites during development and regeneration. Here we discuss recent findings on MPs' origin, differentiation, and maintenance during long bone development and homeostasis, providing clues and models of how the MPs contribute to bone development and repair.
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Affiliation(s)
- Fangyuan Shen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaobin Huang
- Department of Oral and Maxillofacial Surgery/Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Guangxu He
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, NO. 139 Middle Renmin Road, Changsha, Hunan, China.
| | - Yu Shi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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34
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Wu S, Ohba S, Matsushita Y. Single-Cell RNA-Sequencing Reveals the Skeletal Cellular Dynamics in Bone Repair and Osteoporosis. Int J Mol Sci 2023; 24:9814. [PMID: 37372962 DOI: 10.3390/ijms24129814] [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: 04/28/2023] [Revised: 05/29/2023] [Accepted: 06/03/2023] [Indexed: 06/29/2023] Open
Abstract
The bone is an important organ that performs various functions, and the bone marrow inside the skeleton is composed of a complex intermix of hematopoietic, vascular, and skeletal cells. Current single-cell RNA sequencing (scRNA-seq) technology has revealed heterogeneity and sketchy differential hierarchy of skeletal cells. Skeletal stem and progenitor cells (SSPCs) are located upstream of the hierarchy and differentiate into chondrocytes, osteoblasts, osteocytes, and bone marrow adipocytes. In the bone marrow, multiple types of bone marrow stromal cells (BMSCs), which have the potential of SSPCs, are spatiotemporally located in distinct areas, and SSPCs' potential shift of BMSCs may occur with the advancement of age. These BMSCs contribute to bone regeneration and bone diseases, such as osteoporosis. In vivo lineage-tracing technologies show that various types of skeletal lineage cells concomitantly gather and contribute to bone regeneration. In contrast, these cells differentiate into adipocytes with aging, leading to senile osteoporosis. scRNA-seq analysis has revealed that alteration in the cell-type composition is a major cause of tissue aging. In this review, we discuss the cellular dynamics of skeletal cell populations in bone homeostasis, regeneration, and osteoporosis.
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Affiliation(s)
- Sixun Wu
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
| | - Shinsuke Ohba
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
- Department of Tissue and Developmental Biology, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Yuki Matsushita
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
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35
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Wu JY, Yeager K, Tavakol DN, Morsink M, Wang B, Soni RK, Hung CT, Vunjak-Novakovic G. Directed differentiation of human iPSCs into mesenchymal lineages by optogenetic control of TGF-β signaling. Cell Rep 2023; 42:112509. [PMID: 37178118 PMCID: PMC10278972 DOI: 10.1016/j.celrep.2023.112509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 12/28/2022] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
In tissue development and homeostasis, transforming growth factor (TGF)-β signaling is finely coordinated by latent forms and matrix sequestration. Optogenetics can offer precise and dynamic control of cell signaling. We report the development of an optogenetic human induced pluripotent stem cell system for TGF-β signaling and demonstrate its utility in directing differentiation into the smooth muscle, tenogenic, and chondrogenic lineages. Light-activated TGF-β signaling resulted in expression of differentiation markers at levels close to those in soluble factor-treated cultures, with minimal phototoxicity. In a cartilage-bone model, light-patterned TGF-β gradients allowed the establishment of hyaline-like layer of cartilage tissue at the articular surface while attenuating with depth to enable hypertrophic induction at the osteochondral interface. By selectively activating TGF-β signaling in co-cultures of light-responsive and non-responsive cells, undifferentiated and differentiated cells were simultaneously maintained in a single culture with shared medium. This platform can enable patient-specific and spatiotemporally precise studies of cellular decision making.
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Affiliation(s)
- Josephine Y Wu
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | - Keith Yeager
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | | | - Margaretha Morsink
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | - Bryan Wang
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Rajesh Kumar Soni
- Proteomics and Macromolecular Crystallography Shared Resource, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10032, USA
| | - Clark T Hung
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | - Gordana Vunjak-Novakovic
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA; Department of Medicine, Columbia University, New York, NY 10032, USA.
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36
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Abstract
Although osteoblasts and osteocytes are descended from the same lineage, they each have unique and essential roles in bone. Targeting gene deletion to osteoblasts and osteocytes using the Cre/loxP system has greatly increased our current understanding of how these cells function. Additionally, the use of the Cre/loxP system in conjunction with cell-specific reporters has enabled lineage tracing of these bone cells both in vivo and ex vivo. However, concerns have been raised regarding the specificity of the promoters used and the resulting off-target effects on cells within and outside of the bone. In this review, we have summarized the main mouse models that have been used to determine the functions of specific genes in osteoblasts and osteocytes. We discuss the expression patterns and specificity of the different promoter fragments during osteoblast to osteocyte differentiation in vivo. We also highlight how their expression in non-skeletal tissues may complicate the interpretation of study results. A thorough understanding of when and where these promoters are activated will enable improved study design and greater confidence in data interpretation.
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Affiliation(s)
- Y Kitase
- Indiana Center for Musculoskeletal Health, Department of Anatomy, Cell Biology and Physiology, School of Medicine, Indiana University, Indianapolis, IN 46202, United States of America
| | - M Prideaux
- Indiana Center for Musculoskeletal Health, Department of Anatomy, Cell Biology and Physiology, School of Medicine, Indiana University, Indianapolis, IN 46202, United States of America.
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37
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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] [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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38
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Zhang P, Dong J, Fan X, Yong J, Yang M, Liu Y, Zhang X, Lv L, Wen L, Qiao J, Tang F, Zhou Y. Characterization of mesenchymal stem cells in human fetal bone marrow by single-cell transcriptomic and functional analysis. Signal Transduct Target Ther 2023; 8:126. [PMID: 36997513 PMCID: PMC10063684 DOI: 10.1038/s41392-023-01338-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 12/08/2022] [Accepted: 01/29/2023] [Indexed: 04/01/2023] Open
Abstract
AbstractBone marrow mesenchymal stromal/stem cells (MSCs) are a heterogeneous population that can self-renew and generate stroma, cartilage, fat, and bone. Although a significant progress has been made toward recognizing about the phenotypic characteristics of MSCs, the true identity and properties of MSCs in bone marrow remain unclear. Here, we report the expression landscape of human fetal BM nucleated cells (BMNCs) based on the single-cell transcriptomic analysis. Unexpectedly, while the common cell surface markers such as CD146, CD271, and PDGFRa used for isolating MSCs were not detected, LIFR+PDGFRB+ were identified to be specific markers of MSCs as the early progenitors. In vivo transplantation demonstrated that LIFR+PDGFRB+CD45-CD31-CD235a- MSCs could form bone tissues and reconstitute the hematopoietic microenvironment (HME) effectively in vivo. Interestingly, we also identified a subpopulation of bone unipotent progenitor expressing TM4SF1+CD44+CD73+CD45-CD31-CD235a-, which had osteogenic potentials, but could not reconstitute HME. MSCs expressed a set of different transcription factors at the different stages of human fetal bone marrow, indicating that the stemness properties of MSCs might change during development. Moreover, transcriptional characteristics of cultured MSCs were significantly changed compared with freshly isolated primary MSCs. Our cellular profiling provides a general landscape of heterogeneity, development, hierarchy, microenvironment of the human fetal BM-derived stem cells at single-cell resolution.
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Smith N, Shirazi S, Cakouros D, Gronthos S. Impact of Environmental and Epigenetic Changes on Mesenchymal Stem Cells during Aging. Int J Mol Sci 2023; 24:ijms24076499. [PMID: 37047469 PMCID: PMC10095074 DOI: 10.3390/ijms24076499] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023] Open
Abstract
Many crucial epigenetic changes occur during early skeletal development and throughout life due to aging, disease and are heavily influenced by an individual’s lifestyle. Epigenetics is the study of heritable changes in gene expression as the result of changes in the environment without any mutation in the underlying DNA sequence. The epigenetic profiles of cells are dynamic and mediated by different mechanisms, including histone modifications, non-coding RNA-associated gene silencing and DNA methylation. Given the underlining role of dysfunctional mesenchymal tissues in common age-related skeletal diseases such as osteoporosis and osteoarthritis, investigations into skeletal stem cells or mesenchymal stem cells (MSC) and their functional deregulation during aging has been of great interest and how this is mediated by an evolving epigenetic landscape. The present review describes the recent findings in epigenetic changes of MSCs that effect growth and cell fate determination in the context of aging, diet, exercise and bone-related diseases.
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Affiliation(s)
- Nicholas Smith
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
| | - Suzanna Shirazi
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
| | - Dimitrios Cakouros
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
- Correspondence: (D.C.); (S.G.); Tel.: +61-8-8128-4395 (S.G.)
| | - Stan Gronthos
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
- Correspondence: (D.C.); (S.G.); Tel.: +61-8-8128-4395 (S.G.)
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Collins FL, Roelofs AJ, Symons RA, Kania K, Campbell E, Collie-Duguid ESR, Riemen AHK, Clark SM, De Bari C. Taxonomy of fibroblasts and progenitors in the synovial joint at single-cell resolution. Ann Rheum Dis 2023; 82:428-437. [PMID: 36414376 PMCID: PMC9933170 DOI: 10.1136/ard-2021-221682] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 10/05/2022] [Indexed: 11/23/2022]
Abstract
OBJECTIVES Fibroblasts in synovium include fibroblast-like synoviocytes (FLS) in the lining and Thy1+ connective-tissue fibroblasts in the sublining. We aimed to investigate their developmental origin and relationship with adult progenitors. METHODS To discriminate between Gdf5-lineage cells deriving from the embryonic joint interzone and other Pdgfrα-expressing fibroblasts and progenitors, adult Gdf5-Cre;Tom;Pdgfrα-H2BGFP mice were used and cartilage injury was induced to activate progenitors. Cells were isolated from knees, fibroblasts and progenitors were sorted by fluorescence-activated cell-sorting based on developmental origin, and analysed by single-cell RNA-sequencing. Flow cytometry and immunohistochemistry were used for validation. Clonal-lineage mapping was performed using Gdf5-Cre;Confetti mice. RESULTS In steady state, Thy1+ sublining fibroblasts were of mixed ontogeny. In contrast, Thy1-Prg4+ lining fibroblasts predominantly derived from the embryonic joint interzone and included Prg4-expressing progenitors distinct from molecularly defined FLS. Clonal-lineage tracing revealed compartmentalisation of Gdf5-lineage fibroblasts between lining and sublining. Following injury, lining hyperplasia resulted from proliferation and differentiation of Prg4-expressing progenitors, with additional recruitment of non-Gdf5-lineage cells, into FLS. Consistent with this, a second population of proliferating cells, enriched near blood vessels in the sublining, supplied activated multipotent cells predicted to give rise to Thy1+ fibroblasts, and to feed into the FLS differentiation trajectory. Transcriptional programmes regulating fibroblast differentiation trajectories were uncovered, identifying Sox5 and Foxo1 as key FLS transcription factors in mice and humans. CONCLUSIONS Our findings blueprint a cell atlas of mouse synovial fibroblasts and progenitors in healthy and injured knees, and provide novel insights into the cellular and molecular principles governing the organisation and maintenance of adult synovial joints.
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Affiliation(s)
- Fraser L Collins
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Anke J Roelofs
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Rebecca A Symons
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Karolina Kania
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Ewan Campbell
- Centre for Genome-Enabled Biology and Medicine, University of Aberdeen, Aberdeen, UK
| | | | - Anna H K Riemen
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Susan M Clark
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Cosimo De Bari
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
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Solidum JGN, Jeong Y, Heralde F, Park D. Differential regulation of skeletal stem/progenitor cells in distinct skeletal compartments. Front Physiol 2023; 14:1137063. [PMID: 36926193 PMCID: PMC10013690 DOI: 10.3389/fphys.2023.1137063] [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: 01/03/2023] [Accepted: 02/16/2023] [Indexed: 03/06/2023] Open
Abstract
Skeletal stem/progenitor cells (SSPCs), characterized by self-renewal and multipotency, are essential for skeletal development, bone remodeling, and bone repair. These cells have traditionally been known to reside within the bone marrow, but recent studies have identified the presence of distinct SSPC populations in other skeletal compartments such as the growth plate, periosteum, and calvarial sutures. Differences in the cellular and matrix environment of distinct SSPC populations are believed to regulate their stemness and to direct their roles at different stages of development, homeostasis, and regeneration; differences in embryonic origin and adjacent tissue structures also affect SSPC regulation. As these SSPC niches are dynamic and highly specialized, changes under stress conditions and with aging can alter the cellular composition and molecular mechanisms in place, contributing to the dysregulation of local SSPCs and their activity in bone regeneration. Therefore, a better understanding of the different regulatory mechanisms for the distinct SSPCs in each skeletal compartment, and in different conditions, could provide answers to the existing knowledge gap and the impetus for realizing their potential in this biological and medical space. Here, we summarize the current scientific advances made in the study of the differential regulation pathways for distinct SSPCs in different bone compartments. We also discuss the physical, biological, and molecular factors that affect each skeletal compartment niche. Lastly, we look into how aging influences the regenerative capacity of SSPCs. Understanding these regulatory differences can open new avenues for the discovery of novel treatment approaches for calvarial or long bone repair.
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Affiliation(s)
- Jea Giezl Niedo Solidum
- Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines Manila, Manila, Philippines
- Department of Molecular and Human Genetics, Houston, TX, United States
| | - Youngjae Jeong
- Department of Molecular and Human Genetics, Houston, TX, United States
| | - Francisco Heralde
- Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines Manila, Manila, Philippines
| | - Dongsu Park
- Department of Molecular and Human Genetics, Houston, TX, United States
- Center for Skeletal Biology, Baylor College of Medicine, Houston, TX, United States
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Zhang W, Xu Z, Hao X, He T, Li J, Shen Y, Liu K, Gao Y, Liu J, Edwards D, Muscarella AM, Wu L, Yu L, Xu L, Chen X, Wu YH, Bado IL, Ding Y, Aguirre S, Wang H, Gugala Z, Satcher RL, Wong ST, Zhang XHF. Bone Metastasis Initiation Is Coupled with Bone Remodeling through Osteogenic Differentiation of NG2+ Cells. Cancer Discov 2023; 13:474-495. [PMID: 36287038 PMCID: PMC9905315 DOI: 10.1158/2159-8290.cd-22-0220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 09/06/2022] [Accepted: 10/21/2022] [Indexed: 02/07/2023]
Abstract
The bone microenvironment is dynamic and undergoes remodeling in normal and pathologic conditions. Whether such remodeling affects disseminated tumor cells (DTC) and bone metastasis remains poorly understood. Here, we demonstrated that pathologic fractures increase metastatic colonization around the injury. NG2+ cells are a common participant in bone metastasis initiation and bone remodeling in both homeostatic and fractured conditions. NG2+ bone mesenchymal stem/stromal cells (BMSC) often colocalize with DTCs in the perivascular niche. Both DTCs and NG2+ BMSCs are recruited to remodeling sites. Ablation of NG2+ lineage impaired bone remodeling and concurrently diminished metastatic colonization. In cocultures, NG2+ BMSCs, especially when undergoing osteodifferentiation, enhanced cancer cell proliferation and migration. Knockout of N-cadherin in NG2+ cells abolished these effects in vitro and phenocopied NG2+ lineage depletion in vivo. These findings uncover dual roles of NG2+ cells in metastasis and remodeling and indicate that osteodifferentiation of BMSCs promotes metastasis initiation via N-cadherin-mediated cell-cell interaction. SIGNIFICANCE The bone colonization of cancer cells occurs in an environment that undergoes constant remodeling. Our study provides mechanistic insights into how bone homeostasis and pathologic repair lead to the outgrowth of disseminated cancer cells, thereby opening new directions for further etiologic and epidemiologic studies of tumor recurrences. This article is highlighted in the In This Issue feature, p. 247.
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Affiliation(s)
- Weijie Zhang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zhan Xu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Xiaoxin Hao
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tiancheng He
- Department of Systems Medicine and Bioengineering and Translational Biophotonics Laboratory, Houston Methodist Cancer Center, Houston, TX 77030, USA
| | - Jiasong Li
- Department of Systems Medicine and Bioengineering and Translational Biophotonics Laboratory, Houston Methodist Cancer Center, Houston, TX 77030, USA
| | - Yichao Shen
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kai Liu
- Department of Systems Medicine and Bioengineering and Translational Biophotonics Laboratory, Houston Methodist Cancer Center, Houston, TX 77030, USA
| | - Yang Gao
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jun Liu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - David Edwards
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Aaron M. Muscarella
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ling Wu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Liqun Yu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Longyong Xu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Xi Chen
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yi-Hsuan Wu
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Igor L. Bado
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yunfeng Ding
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Sergio Aguirre
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Hai Wang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zbigniew Gugala
- Department of Orthopedic Surgery & Rehabilitation, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Robert L Satcher
- Department of Orthopedic Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Stephen T. Wong
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Systems Medicine and Bioengineering and Translational Biophotonics Laboratory, Houston Methodist Cancer Center, Houston, TX 77030, USA
| | - Xiang H.-F. Zhang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- McNair Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: Xiang H.-F. Zhang, mailing address: One Baylor Plaza, BCM 600, Houston, TX 77030; ; TEL: 713-798-6239.
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Materials and extracellular matrix rigidity highlighted in tissue damages and diseases: Implication for biomaterials design and therapeutic targets. Bioact Mater 2023; 20:381-403. [PMID: 35784640 PMCID: PMC9234013 DOI: 10.1016/j.bioactmat.2022.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/05/2022] [Accepted: 06/10/2022] [Indexed: 11/21/2022] Open
Abstract
Rigidity (or stiffness) of materials and extracellular matrix has proven to be one of the most significant extracellular physicochemical cues that can control diverse cell behaviors, such as contractility, motility, and spreading, and the resultant pathophysiological phenomena. Many 2D materials engineered with tunable rigidity have enabled researchers to elucidate the roles of matrix biophysical cues in diverse cellular events, including migration, lineage specification, and mechanical memory. Moreover, the recent findings accumulated under 3D environments with viscoelastic and remodeling properties pointed to the importance of dynamically changing rigidity in cell fate control, tissue repair, and disease progression. Thus, here we aim to highlight the works related with material/matrix-rigidity-mediated cell and tissue behaviors, with a brief outlook into the studies on the effects of material/matrix rigidity on cell behaviors in 2D systems, further discussion of the events and considerations in tissue-mimicking 3D conditions, and then examination of the in vivo findings that concern material/matrix rigidity. The current discussion will help understand the material/matrix-rigidity-mediated biological phenomena and further leverage the concepts to find therapeutic targets and to design implantable materials for the treatment of damaged and diseased tissues. Discuss the cutting-edge findings on the role of matrix rigidity in dictating diverse cell behaviors. Underscore the dynamic matrix rigidity that interplays with cells, and the related pathophysiological phenomena. Illuminate the significance of matrix rigidity in clinically-relevant settings.
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Liu Y, Ilinski A, Gerstenfeld LC, Bragdon B. Prx1 cell subpopulations identified in various tissues with diverse quiescence and activation ability following fracture and BMP2 stimulation. Front Physiol 2023; 14:1106474. [PMID: 36793419 PMCID: PMC9922707 DOI: 10.3389/fphys.2023.1106474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/18/2023] [Indexed: 01/31/2023] Open
Abstract
The expression of Prx1 has been used as a marker to define the skeletal stem cells (SSCs) populations found within the bone marrow and periosteum that contribute to bone regeneration. However, Prx1 expressing SSCs (Prx1-SSCs) are not restricted to the bone compartments, but are also located within the muscle and able to contribute to ectopic bone formation. Little is known however, about the mechanism(s) regulating Prx1-SSCs that reside in muscle and how they participate in bone regeneration. This study compared both the intrinsic and extrinsic factors of the periosteum and muscle derived Prx1-SSCs and analyzed their regulatory mechanisms of activation, proliferation, and skeletal differentiation. There was considerable transcriptomic heterogeneity in the Prx1-SSCs found in muscle or the periosteum however in vitro cells from both tissues showed tri-lineage (adipose, cartilage and bone) differentiation. At homeostasis, periosteal-derived Prx1 cells were proliferative and low levels of BMP2 were able to promote their differentiation, while the muscle-derived Prx1 cells were quiescent and refractory to comparable levels of BMP2 that promoted periosteal cell differentiation. The transplantation of Prx1-SCC from muscle and periosteum into either the same site from which they were isolated, or their reciprocal sites showed that periosteal cell transplanted onto the surface of bone tissues differentiated into bone and cartilage cells but was incapable of similar differentiation when transplanted into muscle. Prx1-SSCs from the muscle showed no ability to differentiate at either site of transplantation. Both fracture and ten times the BMP2 dose was needed to promote muscle-derived cells to rapidly enter the cell cycle as well as undergo skeletal cell differentiation. This study elucidates the diversity of the Prx1-SSC population showing that cells within different tissue sites are intrinsically different. While muscle tissue must have factors that promote Prx1-SSC to remain quiescent, either bone injury or high levels of BMP2 can activate these cells to both proliferate and undergo skeletal cell differentiation. Finally, these studies raise the possibility that muscle SSCs are potential target for skeletal repair and bone diseases.
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Affiliation(s)
| | | | | | - Beth Bragdon
- Department of Orthopaedic Surgery, Boston University School of Medicine, Boston, MA, United States
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Schulze F, Lang A, Schoon J, Wassilew GI, Reichert J. Scaffold Guided Bone Regeneration for the Treatment of Large Segmental Defects in Long Bones. Biomedicines 2023; 11:biomedicines11020325. [PMID: 36830862 PMCID: PMC9953456 DOI: 10.3390/biomedicines11020325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/26/2023] Open
Abstract
Bone generally displays a high intrinsic capacity to regenerate. Nonetheless, large osseous defects sometimes fail to heal. The treatment of such large segmental defects still represents a considerable clinical challenge. The regeneration of large bone defects often proves difficult, since it relies on the formation of large amounts of bone within an environment impedimental to osteogenesis, characterized by soft tissue damage and hampered vascularization. Consequently, research efforts have concentrated on tissue engineering and regenerative medical strategies to resolve this multifaceted challenge. In this review, we summarize, critically evaluate, and discuss present approaches in light of their clinical relevance; we also present future advanced techniques for bone tissue engineering, outlining the steps to realize for their translation from bench to bedside. The discussion includes the physiology of bone healing, requirements and properties of natural and synthetic biomaterials for bone reconstruction, their use in conjunction with cellular components and suitable growth factors, and strategies to improve vascularization and the translation of these regenerative concepts to in vivo applications. We conclude that the ideal all-purpose material for scaffold-guided bone regeneration is currently not available. It seems that a variety of different solutions will be employed, according to the clinical treatment necessary.
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Affiliation(s)
- Frank Schulze
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Annemarie Lang
- Departments of Orthopaedic Surgery & Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Janosch Schoon
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Georgi I. Wassilew
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Johannes Reichert
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, 17475 Greifswald, Germany
- Correspondence: ; Tel.: +49-3834-86-22530
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Li M, Li T, Yin J, Xie C, Zhu J. Evaluation of toxicological effects of bisphenol S with an in vitro human bone marrow mesenchymal stem cell: Implications for bone health. Toxicology 2023; 484:153408. [PMID: 36565802 DOI: 10.1016/j.tox.2022.153408] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
As the use of bisphenol A (BPA) has been restricted in consumer products, bisphenol S (BPS) is one major alternative to BPA for various materials, leading to growing concerns about its health risks in human beings. However, little is known about the toxic effects of BPS on bone health. We employed human bone marrow mesenchymal stem cells (hBMSCs) for the in vitro assessment of BPS on cell proliferation, differentiation, and self-renewal. Our study revealed that BPS at concentrations of 10-10-10-7 M increased cell viability but induced the morphological changes of hBMSCs. Moreover, BPS decreased ROS generation and increased Nrf2 expression. Furthermore, BPS not only activated ERα/β expression but also increased β-catenin expression and induced the replicative senescence of hBMSCs. Furthermore, we found that the upregulation of β-catenin induced by BPS was mediated, in part, by ER signaling. Overall, our results suggested BPS exposure caused the homeostatic imbalance of hBMSCs.
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Affiliation(s)
- Mei Li
- The Laboratory Center for Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing 211166, China
| | - Tenglong Li
- The Laboratory Center for Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Juan Yin
- Department of Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, China
| | - Chunfeng Xie
- Department of Nutrition and Food Safety, School of Public Health, Nanjing Medical University, Nanjing 211166, China.
| | - Jianyun Zhu
- Department of Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, China.
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Endogenous IL-1 receptor antagonist restricts healthy and malignant myeloproliferation. Nat Commun 2023; 14:12. [PMID: 36596811 PMCID: PMC9810723 DOI: 10.1038/s41467-022-35700-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 12/16/2022] [Indexed: 01/04/2023] Open
Abstract
Here we explored the role of interleukin-1β (IL-1β) repressor cytokine, IL-1 receptor antagonist (IL-1rn), in both healthy and abnormal hematopoiesis. Low IL-1RN is frequent in acute myeloid leukemia (AML) patients and represents a prognostic marker of reduced survival. Treatments with IL-1RN and the IL-1β monoclonal antibody canakinumab reduce the expansion of leukemic cells, including CD34+ progenitors, in AML xenografts. In vivo deletion of IL-1rn induces hematopoietic stem cell (HSC) differentiation into the myeloid lineage and hampers B cell development via transcriptional activation of myeloid differentiation pathways dependent on NFκB. Low IL-1rn is present in an experimental model of pre-leukemic myelopoiesis, and IL-1rn deletion promotes myeloproliferation, which relies on the bone marrow hematopoietic and stromal compartments. Conversely, IL-1rn protects against pre-leukemic myelopoiesis. Our data reveal that HSC differentiation is controlled by balanced IL-1β/IL-1rn levels under steady-state, and that loss of repression of IL-1β signaling may underlie pre-leukemic lesion and AML progression.
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48
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Matthews EZ, Lanham S, White K, Kyriazi ME, Alexaki K, El-Sagheer AH, Brown T, Kanaras AG, J West J, MacArthur BD, Stumpf PS, Oreffo ROC. Single-cell RNA-sequence analysis of human bone marrow reveals new targets for isolation of skeletal stem cells using spherical nucleic acids. J Tissue Eng 2023; 14:20417314231169375. [PMID: 37216034 PMCID: PMC10192814 DOI: 10.1177/20417314231169375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/24/2023] [Indexed: 05/24/2023] Open
Abstract
There is a wealth of data indicating human bone marrow contains skeletal stem cells (SSC) with the capacity for osteogenic, chondrogenic and adipogenic differentiation. However, current methods to isolate SSCs are restricted by the lack of a defined marker, limiting understanding of SSC fate, immunophenotype, function and clinical application. The current study applied single-cell RNA-sequencing to profile human adult bone marrow populations from 11 donors and identified novel targets for SSC enrichment. Spherical nucleic acids were used to detect these mRNA targets in SSCs. This methodology was able to rapidly isolate potential SSCs found at a frequency of <1 in 1,000,000 in human bone marrow, with the capacity for tri-lineage differentiation in vitro and ectopic bone formation in vivo. The current studies detail the development of a platform to advance SSC enrichment from human bone marrow, offering an invaluable resource for further SSC characterisation, with significant therapeutic impact therein.
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Affiliation(s)
- Elloise Z Matthews
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
| | - Stuart Lanham
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
- Cancer Sciences, Faculty of Medicine,
University of Southampton, Southampton, UK
| | - Kate White
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
| | - Maria-Eleni Kyriazi
- College of Engineering and Technology,
American University of the Middle East, Kuwait
| | - Konstantina Alexaki
- Physics and Astronomy, Faculty of
Physical Sciences and Engineering, University of Southampton, Southampton, UK
| | - Afaf H El-Sagheer
- Department of Chemistry, Chemistry
Research Laboratory, University of Oxford, Oxford, UK
- Chemistry Branch, Department of Science
and Mathematics, Faculty of Petroleum and Mining Engineering, Suez University, Suez,
Egypt
| | - Tom Brown
- Department of Chemistry, Chemistry
Research Laboratory, University of Oxford, Oxford, UK
| | - Antonios G Kanaras
- Physics and Astronomy, Faculty of
Physical Sciences and Engineering, University of Southampton, Southampton, UK
- Institute for Life Sciences, University
of Southampton, Southampton, UK
| | - Jonathan J West
- Cancer Sciences, Faculty of Medicine,
University of Southampton, Southampton, UK
- Physics and Astronomy, Faculty of
Physical Sciences and Engineering, University of Southampton, Southampton, UK
| | - Ben D MacArthur
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
- Institute for Life Sciences, University
of Southampton, Southampton, UK
- Mathematical Sciences, University of
Southampton, Southampton, UK
| | - Patrick S Stumpf
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
- Joint Research Center for Computational
Biomedicine, RWTH Aachen University, Aachen, Germany
| | - Richard OC Oreffo
- Faculty of Medicine, Centre for Human
Development, Stem Cells and Regeneration, Human Development and Health, Institute of
Developmental Sciences, University of Southampton, Southampton, UK
- Institute for Life Sciences, University
of Southampton, Southampton, UK
- College of Biomedical Engineering,
China Medical University, Taichung, Taiwan
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49
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La Spina E, Giallongo S, Giallongo C, Vicario N, Duminuco A, Parenti R, Giuffrida R, Longhitano L, Li Volti G, Cambria D, Di Raimondo F, Musumeci G, Romano A, Palumbo GA, Tibullo D. Mesenchymal stromal cells in tumor microenvironment remodeling of BCR-ABL negative myeloproliferative diseases. Front Oncol 2023; 13:1141610. [PMID: 36910610 PMCID: PMC9996158 DOI: 10.3389/fonc.2023.1141610] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 02/13/2023] [Indexed: 02/25/2023] Open
Abstract
Chronic myeloproliferative neoplasms encompass the BCR-ABL1-negative neoplasms polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF). These are characterized by calreticulin (CALR), myeloproliferative leukemia virus proto-oncogene (MPL) and the tyrosine kinase Janus kinase 2 (JAK2) mutations, eventually establishing a hyperinflammatory tumor microenvironment (TME). Several reports have come to describe how constitutive activation of JAK-STAT and NFκB signaling pathways lead to uncontrolled myeloproliferation and pro-inflammatory cytokines secretion. In such a highly oxidative TME, the balance between Hematopoietic Stem Cells (HSCs) and Mesenchymal Stromal Cells (MSCs) has a crucial role in MPN development. For this reason, we sought to review the current literature concerning the interplay between HSCs and MSCs. The latter have been reported to play an outstanding role in establishing of the typical bone marrow (BM) fibrotic TME as a consequence of the upregulation of different fibrosis-associated genes including PDGF- β upon their exposure to the hyperoxidative TME characterizing MPNs. Therefore, MSCs might turn to be valuable candidates for niche-targeted targeting the synthesis of cytokines and oxidative stress in association with drugs eradicating the hematopoietic clone.
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Affiliation(s)
- Enrico La Spina
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Sebastiano Giallongo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Cesarina Giallongo
- Department of Medical-Surgical Science and Advanced Technologies "Ingrassia", University of Catania, Catania, Italy
| | - Nunzio Vicario
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Andrea Duminuco
- Department of General Surgery and Medical-Surgical Specialties, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, Catania, Italy
| | - Rosalba Parenti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Rosario Giuffrida
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Lucia Longhitano
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Giovanni Li Volti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Daniela Cambria
- Department of General Surgery and Medical-Surgical Specialties, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, Catania, Italy
| | - Francesco Di Raimondo
- Department of General Surgery and Medical-Surgical Specialties, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, Catania, Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Alessandra Romano
- Department of General Surgery and Medical-Surgical Specialties, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, Catania, Italy
| | - Giuseppe Alberto Palumbo
- Department of Medical-Surgical Science and Advanced Technologies "Ingrassia", University of Catania, Catania, Italy
| | - Daniele Tibullo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
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50
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Mitchell CA, Verovskaya EV, Calero-Nieto FJ, Olson OC, Swann JW, Wang X, Hérault A, Dellorusso PV, Zhang SY, Svendsen AF, Pietras EM, Bakker ST, Ho TT, Göttgens B, Passegué E. Stromal niche inflammation mediated by IL-1 signalling is a targetable driver of haematopoietic ageing. Nat Cell Biol 2023; 25:30-41. [PMID: 36650381 PMCID: PMC7614279 DOI: 10.1038/s41556-022-01053-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 11/15/2022] [Indexed: 01/19/2023]
Abstract
Haematopoietic ageing is marked by a loss of regenerative capacity and skewed differentiation from haematopoietic stem cells (HSCs), leading to impaired blood production. Signals from the bone marrow niche tailor blood production, but the contribution of the old niche to haematopoietic ageing remains unclear. Here we characterize the inflammatory milieu that drives both niche and haematopoietic remodelling. We find decreased numbers and functionality of osteoprogenitors at the endosteum and expansion of central marrow LepR+ mesenchymal stromal cells associated with deterioration of the sinusoidal vasculature. Together, they create a degraded and inflamed old bone marrow niche. Niche inflammation in turn drives the chronic activation of emergency myelopoiesis pathways in old HSCs and multipotent progenitors, which promotes myeloid differentiation and hinders haematopoietic regeneration. Moreover, we show how production of interleukin-1β (IL-1β) by the damaged endosteum acts in trans to drive the proinflammatory nature of the central marrow, with damaging consequences for the old blood system. Notably, niche deterioration, HSC dysfunction and defective regeneration can all be ameliorated by blocking IL-1 signalling. Our results demonstrate that targeting IL-1 as a key mediator of niche inflammation is a tractable strategy to improve blood production during ageing.
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Affiliation(s)
- Carl A Mitchell
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA
| | - Evgenia V Verovskaya
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Fernando J Calero-Nieto
- Wellcome and MRC Cambridge Stem Cell Institute, Department of Haematology, Jeffrey Cheah Biomedical Centre, Cambridge University, Cambridge, UK
| | - Oakley C Olson
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA
| | - James W Swann
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA
| | - Xiaonan Wang
- Wellcome and MRC Cambridge Stem Cell Institute, Department of Haematology, Jeffrey Cheah Biomedical Centre, Cambridge University, Cambridge, UK
| | - Aurélie Hérault
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Paul V Dellorusso
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA
| | - Si Yi Zhang
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Arthur Flohr Svendsen
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Eric M Pietras
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Sietske T Bakker
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Theodore T Ho
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Berthold Göttgens
- Wellcome and MRC Cambridge Stem Cell Institute, Department of Haematology, Jeffrey Cheah Biomedical Centre, Cambridge University, Cambridge, UK
| | - Emmanuelle Passegué
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY, USA.
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Division Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA.
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