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Finlay M, Hill LA, Neag G, Patel B, Chipara M, Lamont HC, Frost K, Patrick K, Lewis JW, Nicholson T, Edwards J, Jones SW, Grover LM, Naylor AJ. A detailed methodology for the long-term in vitro culture and analysis of three-dimensional, self-structuring bone models generated from cell lines or primary osteoblastic cell populations. F1000Res 2024; 12:357. [PMID: 38778815 PMCID: PMC11109547 DOI: 10.12688/f1000research.130779.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/30/2024] [Indexed: 05/25/2024] Open
Abstract
Background There are insufficient in vitro bone models that accommodate long-term culture of osteoblasts and support their differentiation to osteocytes. The increased demand for effective therapies for bone diseases, and the ethical requirement to replace animals in research, warrants the development of such models.Here we present an in-depth protocol to prepare, create and maintain three-dimensional, in vitro, self-structuring bone models that support osteocytogenesis and long-term osteoblast survival (>1 year). Methods Osteoblastic cells are seeded on a fibrin hydrogel, cast between two beta-tricalcium phosphate anchors. Analytical methods optimised for these self-structuring bone model (SSBM) constructs, including RT-qPCR, immunofluorescence staining and XRF, are described in detail. Results Over time, the cells restructure and replace the initial matrix with a collagen-rich, mineralising one; and demonstrate differentiation towards osteocytes within 12 weeks of culture. Conclusions Whilst optimised using a secondary human cell line (hFOB 1.19), this protocol readily accommodates osteoblasts from other species (rat and mouse) and origins (primary and secondary). This simple, straightforward method creates reproducible in vitro bone models that are responsive to exogenous stimuli, offering a versatile platform for conducting preclinical translatable research studies.
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Affiliation(s)
- Melissa Finlay
- Healthcare Technologies Institute, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Laurence A Hill
- Healthcare Technologies Institute, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Georgiana Neag
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Binal Patel
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Miruna Chipara
- Healthcare Technologies Institute, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Hannah C Lamont
- Healthcare Technologies Institute, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Kathryn Frost
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Kieran Patrick
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Jonathan W Lewis
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Thomas Nicholson
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - James Edwards
- NDORMS, University of Oxford, Oxford, Oxfordshire, OX3 7HE, UK
| | - Simon W Jones
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Liam M Grover
- Healthcare Technologies Institute, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
| | - Amy J Naylor
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, West Midlands, B15 2TT, UK
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2
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Adhikari M, Kaur J, Sabol HM, Anloague A, Khan S, Kurihara N, Diaz-delCastillo M, Andreasen CM, Barnes CL, Stambough JB, Palmieri M, Reyes-Castro O, Ambrogini E, Almeida M, O’Brien CA, Nookaw I, Delgado-Calle J. Single-cell Transcriptome Analysis Identifies Senescent Osteocytes as Contributors to Bone Destruction in Breast Cancer Metastasis. RESEARCH SQUARE 2024:rs.3.rs-4047486. [PMID: 38558984 PMCID: PMC10980159 DOI: 10.21203/rs.3.rs-4047486/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Breast cancer bone metastases increase fracture risk and are a major cause of morbidity and mortality among women. Upon colonization by tumor cells, the bone microenvironment undergoes profound reprogramming to support cancer progression that disrupts the balance between osteoclasts and osteoblasts, leading to bone lesions. Whether such reprogramming affects matrix-embedded osteocytes remains poorly understood. Here, we demonstrate that osteocytes in breast cancer bone metastasis develop premature senescence and a distinctive senescence-associated secretory phenotype (SASP) that favors bone destruction. Single-cell RNA sequencing identified osteocytes from mice with breast cancer bone metastasis enriched in senescence and SASP markers and pro-osteoclastogenic genes. Using multiplex in situ hybridization and AI-assisted analysis, we detected osteocytes with senescence-associated distension of satellites, telomere dysfunction, and p16Ink4a expression in mice and patients with breast cancer bone metastasis. In vitro and ex vivo organ cultures showed that breast cancer cells promote osteocyte senescence and enhance their osteoclastogenic potential. Clearance of senescent cells with senolytics suppressed bone resorption and preserved bone mass in mice with breast cancer bone metastasis. These results demonstrate that osteocytes undergo pathological reprogramming by breast cancer cells and identify osteocyte senescence as an initiating event triggering bone destruction in breast cancer metastases.
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Affiliation(s)
- Manish Adhikari
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Japneet Kaur
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Hayley M. Sabol
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Aric Anloague
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Sharmin Khan
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Noriyoshi Kurihara
- Division of Hematology and Oncology, Department of Medicine, Indiana University, Indianapolis, IN, US
| | | | - Christina Møller Andreasen
- Molecular Bone Histology lab, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Clinical Pathologyogy, Odense University Hospital, Odense University Hospital, Odense, Denmark
| | - C. Lowry Barnes
- Department of Orthopedic Surgery; University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Jeffrey B. Stambough
- Department of Orthopedic Surgery; University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Michela Palmieri
- Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences and Central Arkansas Veterans Healthcare System, Little Rock, AR, US
| | - Olivia Reyes-Castro
- Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences and Central Arkansas Veterans Healthcare System, Little Rock, AR, US
| | - Elena Ambrogini
- Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences and Central Arkansas Veterans Healthcare System, Little Rock, AR, US
| | - Maria Almeida
- Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences and Central Arkansas Veterans Healthcare System, Little Rock, AR, US
| | - Charles A. O’Brien
- Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences and Central Arkansas Veterans Healthcare System, Little Rock, AR, US
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Intawat Nookaw
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, US
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, US
| | - Jesus Delgado-Calle
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, US
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, US
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3
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Anup A, Dieterich S, Oreffo ROC, Dailey HL, Lang A, Haffner-Luntzer M, Hixon KR. Embracing ethical research: Implementing the 3R principles into fracture healing research for sustainable scientific progress. J Orthop Res 2024; 42:568-577. [PMID: 38124294 DOI: 10.1002/jor.25741] [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: 08/17/2023] [Revised: 10/26/2023] [Accepted: 11/14/2023] [Indexed: 12/23/2023]
Abstract
As scientific advancements continue to reshape the world, it becomes increasingly crucial to uphold ethical standards and minimize the potentially adverse impact of research activities. In this context, the implementation of the 3R principles-Replacement, Reduction, and Refinement-has emerged as a prominent framework for promoting ethical research practices in the use of animals. This article aims to explore recent advances in integrating the 3R principles into fracture healing research, highlighting their potential to enhance animal welfare, scientific validity, and societal trust. The review focuses on in vitro, in silico, ex vivo, and refined in vivo methods, which have the potential to replace, reduce, and refine animal experiments in musculoskeletal, bone, and fracture healing research. Here, we review material that was presented at the workshop "Implementing 3R Principles into Fracture Healing Research" at the 2023 Orthopedic Research Society (ORS) Annual Meeting in Dallas, Texas.
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Affiliation(s)
- Amritha Anup
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA
| | - Sandra Dieterich
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Richard O C Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Hannah L Dailey
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Annemarie Lang
- Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania, USA
| | - Melanie Haffner-Luntzer
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Katherine R Hixon
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA
- Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, USA
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4
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García-Sánchez D, González-González A, Álvarez-Iglesias I, del Dujo-Gutiérrez M, Bolado-Carrancio A, Certo M, Pérez-Núñez MI, Riancho JA, Rodríguez-Rey JC, Delgado-Calle J, Pérez-Campo FM. Engineering a Pro-Osteogenic Secretome through the Transient Silencing of the Gene Encoding Secreted Frizzled Related Protein 1. Int J Mol Sci 2023; 24:12399. [PMID: 37569774 PMCID: PMC10419110 DOI: 10.3390/ijms241512399] [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: 06/22/2023] [Revised: 07/22/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
The evidence sustaining the regenerative properties of mesenchymal stem cells' (MSCs) secretome has prompted a paradigm change, where MSCs have shifted from being considered direct contributors to tissue regeneration toward being seen as cell factories for producing biotech medicines. We have previously designed a method to prime MSCs towards osteogenic differentiation by silencing the Wnt/β-Catenin inhibitor Sfpr1. This approach produces a significant increase in bone formation in osteoporotic mice. In this current work, we set to investigate the contribution of the secretome from the MSCs where Sfrp1 has been silenced, to the positive effect seen on bone regeneration in vivo. The conditioned media (CM) of the murine MSCs line C3H10T1/2, where Sfrp1 has been transiently silenced (CM-Sfrp1), was found to induce, in vitro, an increase in the osteogenic differentiation of this same cell line, as well as a decrease of the expression of the Wnt inhibitor Dkk1 in murine osteocytes ex vivo. A reduction in the RANKL/OPG ratio was also detected ex vivo, suggesting a negative effect of CM-Sfrp1 on osteoclastogenesis. Moreover, this CM significantly increases the mineralization of human primary MSCs isolated from osteoportotic patients in vitro. Proteomic analysis identified enrichment of proteins involved in osteogenesis within the soluble and vesicular fractions of this secretome. Altogether, we demonstrate the pro-osteogenic potential of the secretome of MSCs primmed in this fashion, suggesting that this is a valid approach to enhance the osteo-regenerative properties of MSCs' secretome.
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Affiliation(s)
- Daniel García-Sánchez
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - Alberto González-González
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - Itzíar Álvarez-Iglesias
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - Mónica del Dujo-Gutiérrez
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - Alfonso Bolado-Carrancio
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh EH4 2XR, UK;
| | - Matilde Certo
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - María Isabel Pérez-Núñez
- Department of Traumatology, Hospital Universitario Marqués de Valdecilla, University of Cantabria, 39008 Santander, Spain;
| | - José A. Riancho
- Department of Internal Medicine, Hospital Universitario Marqués de Valdecilla-IDIVAL, University of Cantabria, CEBERER, 39012 Santander, Spain;
| | - José Carlos Rodríguez-Rey
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
| | - Jesús Delgado-Calle
- Department of Physiology and Cell Biology, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | - Flor María Pérez-Campo
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Cantabria-IDIVAL, 39012 Santander, Spain; (D.G.-S.); (A.G.-G.); (I.Á.-I.); (M.d.D.-G.); (M.C.); (J.C.R.-R.)
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5
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Stein M, Elefteriou F, Busse B, Fiedler IA, Kwon RY, Farell E, Ahmad M, Ignatius A, Grover L, Geris L, Tuckermann J. Why Animal Experiments Are Still Indispensable in Bone Research: A Statement by the European Calcified Tissue Society. J Bone Miner Res 2023; 38:1045-1061. [PMID: 37314012 PMCID: PMC10962000 DOI: 10.1002/jbmr.4868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 05/03/2023] [Accepted: 06/09/2023] [Indexed: 06/15/2023]
Abstract
Major achievements in bone research have always relied on animal models and in vitro systems derived from patient and animal material. However, the use of animals in research has drawn intense ethical debate and the complete abolition of animal experimentation is demanded by fractions of the population. This phenomenon is enhanced by the reproducibility crisis in science and the advance of in vitro and in silico techniques. 3D culture, organ-on-a-chip, and computer models have improved enormously over the last few years. Nevertheless, the overall complexity of bone tissue cross-talk and the systemic and local regulation of bone physiology can often only be addressed in entire vertebrates. Powerful genetic methods such as conditional mutagenesis, lineage tracing, and modeling of the diseases enhanced the understanding of the entire skeletal system. In this review endorsed by the European Calcified Tissue Society (ECTS), a working group of investigators from Europe and the US provides an overview of the strengths and limitations of experimental animal models, including rodents, fish, and large animals, as well the potential and shortcomings of in vitro and in silico technologies in skeletal research. We propose that the proper combination of the right animal model for a specific hypothesis and state-of-the-art in vitro and/or in silico technology is essential to solving remaining important questions in bone research. This is crucial for executing most efficiently the 3R principles to reduce, refine, and replace animal experimentation, for enhancing our knowledge of skeletal biology, and for the treatment of bone diseases that affect a large part of society. © 2023 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Merle Stein
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Florent Elefteriou
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, USA and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Björn Busse
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Interdisciplinary Competence Center for Interface Research (ICCIR), University Medical Center Hamburg-Eppendorf, Germany
| | - Imke A.K. Fiedler
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Interdisciplinary Competence Center for Interface Research (ICCIR), University Medical Center Hamburg-Eppendorf, Germany
| | - Ronald Young Kwon
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, USA and Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, USA
| | - Eric Farell
- Department of Oral and Maxillofacial Surgery, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Mubashir Ahmad
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Anita Ignatius
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Liam Grover
- Healthcare Technologies Institute, Institute of Translational MedicineHeritage Building Edgbaston, Birmingham
| | - Liesbet Geris
- Biomechanics Research Unit, GIGA In Silico Medicine, University of Liège, Liège, Belgium
- Skeletal Biology & Engineering Research Center, KU Leuven, Leuven, Belgium
| | - Jan Tuckermann
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
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6
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Hart DA. Regulation of Bone by Mechanical Loading, Sex Hormones, and Nerves: Integration of Such Regulatory Complexity and Implications for Bone Loss during Space Flight and Post-Menopausal Osteoporosis. Biomolecules 2023; 13:1136. [PMID: 37509172 PMCID: PMC10377148 DOI: 10.3390/biom13071136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/04/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
During evolution, the development of bone was critical for many species to thrive and function in the boundary conditions of Earth. Furthermore, bone also became a storehouse for calcium that could be mobilized for reproductive purposes in mammals and other species. The critical nature of bone for both function and reproductive needs during evolution in the context of the boundary conditions of Earth has led to complex regulatory mechanisms that require integration for optimization of this tissue across the lifespan. Three important regulatory variables include mechanical loading, sex hormones, and innervation/neuroregulation. The importance of mechanical loading has been the target of much research as bone appears to subscribe to the "use it or lose it" paradigm. Furthermore, because of the importance of post-menopausal osteoporosis in the risk for fractures and loss of function, this aspect of bone regulation has also focused research on sex differences in bone regulation. The advent of space flight and exposure to microgravity has also led to renewed interest in this unique environment, which could not have been anticipated by evolution, to expose new insights into bone regulation. Finally, a body of evidence has also emerged indicating that the neuroregulation of bone is also central to maintaining function. However, there is still more that is needed to understand regarding how such variables are integrated across the lifespan to maintain function, particularly in a species that walks upright. This review will attempt to discuss these regulatory elements for bone integrity and propose how further study is needed to delineate the details to better understand how to improve treatments for those at risk for loss of bone integrity, such as in the post-menopausal state or during prolonged space flight.
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Affiliation(s)
- David A Hart
- Department of Surgery, Faculty of Kinesiology, and McCaig Institute for Bone & Joint Research, University of Calgary, Calgary, AB T2N 4N1, Canada
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7
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Kato G, Araújo R, Rodrigues C, Gomes PS, Grenho L, Fernandes MH. Ex Vivo Osteogenesis Induced by Calcium Silicate-Based Cement Extracts. J Funct Biomater 2023; 14:314. [PMID: 37367277 DOI: 10.3390/jfb14060314] [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: 04/25/2023] [Revised: 05/27/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023] Open
Abstract
Calcium silicate-based cements are used in a variety of clinical conditions affecting the pulp tissue, relying on their inductive effect on tissue mineralization. This work aimed to evaluate the biological response of calcium silicate-based cements with distinct properties-the fast-setting Biodentine™ and TotalFill® BC RRM™ Fast Putty, and the classical slow-setting ProRoot® MTA, in an ex vivo model of bone development. Briefly, eleven-day-old embryonic chick femurs were cultured for 10 days in organotypic conditions, being exposed to the set cements' eluates and, at the end of the culture period, evaluated for osteogenesis/bone formation by combining microtomographic analysis and histological histomorphometric assessment. ProRoot® MTA and TotalFill® extracts presented similar levels of calcium ions, although significantly lower than those released from BiodentineTM. All extracts increased the osteogenesis/tissue mineralization, assayed by microtomographic (BV/TV) and histomorphometric (% of mineralized area; % of total collagen area, and % of mature collagen area) indexes, although displaying distinct dose-dependent patterns and quantitative values. The fast-setting cements displayed better performance than that of ProRoot® MTA, with BiodentineTM presenting the best performance, within the assayed experimental model.
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Affiliation(s)
- Gabriel Kato
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
| | - Rita Araújo
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
| | - Cláudia Rodrigues
- Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
| | - Pedro Sousa Gomes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
| | - Liliana Grenho
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
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8
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Zhu L, Tang Y, Li XY, Kerk SA, Lyssiotis CA, Feng W, Sun X, Hespe GE, Wang Z, Stemmler MP, Brabletz S, Brabletz T, Keller ET, Ma J, Cho JS, Yang J, Weiss SJ. A Zeb1/MtCK1 metabolic axis controls osteoclast activation and skeletal remodeling. EMBO J 2023; 42:e111148. [PMID: 36843552 PMCID: PMC10068323 DOI: 10.15252/embj.2022111148] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 01/29/2023] [Accepted: 02/02/2023] [Indexed: 02/28/2023] Open
Abstract
Osteoclasts are bone-resorbing polykaryons responsible for skeletal remodeling during health and disease. Coincident with their differentiation from myeloid precursors, osteoclasts undergo extensive transcriptional and metabolic reprogramming in order to acquire the cellular machinery necessary to demineralize bone and digest its interwoven extracellular matrix. While attempting to identify new regulatory molecules critical to bone resorption, we discovered that murine and human osteoclast differentiation is accompanied by the expression of Zeb1, a zinc-finger transcriptional repressor whose role in normal development is most frequently linked to the control of epithelial-mesenchymal programs. However, following targeting, we find that Zeb1 serves as an unexpected regulator of osteoclast energy metabolism. In vivo, Zeb1-null osteoclasts assume a hyperactivated state, markedly decreasing bone density due to excessive resorptive activity. Mechanistically, Zeb1 acts in a rheostat-like fashion to modulate murine and human osteoclast activity by transcriptionally repressing an ATP-buffering enzyme, mitochondrial creatine kinase 1 (MtCK1), thereby controlling the phosphocreatine energy shuttle and mitochondrial respiration. Together, these studies identify a novel Zeb1/MtCK1 axis that exerts metabolic control over bone resorption in vitro and in vivo.
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Affiliation(s)
- Lingxin Zhu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Yi Tang
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Xiao-Yan Li
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Samuel A Kerk
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Doctoral Program in Cancer Biology, University of Michigan, Ann Arbor, MI, USA.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Costas A Lyssiotis
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA.,Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - Wenqing Feng
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Xiaoyue Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Geoffrey E Hespe
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Surgery, Section of Plastic Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Zijun Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Marc P Stemmler
- Department of Experimental Medicine 1, Nikolaus-Fiebiger Center for Molecular Medicine, FAU University Erlangen-Nürnberg, Erlangen, Germany
| | - Simone Brabletz
- Department of Experimental Medicine 1, Nikolaus-Fiebiger Center for Molecular Medicine, FAU University Erlangen-Nürnberg, Erlangen, Germany
| | - Thomas Brabletz
- Department of Experimental Medicine 1, Nikolaus-Fiebiger Center for Molecular Medicine, FAU University Erlangen-Nürnberg, Erlangen, Germany
| | - Evan T Keller
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA.,Department of Urology and the Institute of Gerontology, University of Michigan, Ann Arbor, MI, USA
| | - Jun Ma
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jung-Sun Cho
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jingwen Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China.,School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Stephen J Weiss
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
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9
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de Wildt BWM, Cramer EEA, de Silva LS, Ito K, Gawlitta D, Hofmann S. Evaluating material-driven regeneration in a tissue engineered human in vitro bone defect model. Bone 2023; 166:116597. [PMID: 36280106 DOI: 10.1016/j.bone.2022.116597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/07/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022]
Abstract
Advanced in vitro human bone defect models can contribute to the evaluation of materials for in situ bone regeneration, addressing both translational and ethical concerns regarding animal models. In this study, we attempted to develop such a model to study material-driven regeneration, using a tissue engineering approach. By co-culturing human umbilical vein endothelial cells (HUVECs) with human bone marrow-derived mesenchymal stromal cells (hBMSCs) on silk fibroin scaffolds with in vitro critically sized defects, the growth of vascular-like networks and three-dimensional bone-like tissue was facilitated. After a model build-up phase of 28 days, materials were artificially implanted and HUVEC and hBMSC migration, cell-material interactions, and osteoinduction were evaluated 14 days after implantation. The materials physiologically relevant for bone regeneration included a platelet gel as blood clot mimic, cartilage spheres as soft callus mimics, and a fibrin gel as control. Although the in vitro model was limited in the evaluation of immune responses, hallmarks of physiological bone regeneration were observed in vitro. These included the endothelial cell chemotaxis induced by the blood clot mimic and the mineralization of the soft callus mimic. Therefore, the present in vitro model could contribute to an improved pre-clinical evaluation of biomaterials while reducing the need for animal experiments.
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Affiliation(s)
- Bregje W M de Wildt
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Esther E A Cramer
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Leanne S de Silva
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Keita Ito
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Debby Gawlitta
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Sandra Hofmann
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands.
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10
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Sabol HM, Amorim T, Ashby C, Halladay D, Anderson J, Cregor M, Sweet M, Nookaew I, Kurihara N, Roodman GD, Bellido T, Delgado-Calle J. Notch3 signaling between myeloma cells and osteocytes in the tumor niche promotes tumor growth and bone destruction. Neoplasia 2022; 28:100785. [PMID: 35390742 PMCID: PMC8990177 DOI: 10.1016/j.neo.2022.100785] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 03/10/2022] [Indexed: 12/03/2022]
Abstract
Notch3 promotes proliferation and enhances the osteoclastogenic potential of multiple myeloma cells. Notch3 mediates the communication between myeloma cells and osteocytes that leads to tumor proliferation. Newly diagnosed MM patients with high Notch3 expression exhibit upregulation of gene signatures associated with cell proliferation and osteoclast formation. Genetic inhibition of Notch3 in MM cells markedly decreases tumor growth and bone destruction in an immunocompetent mouse model of MM disease.
In multiple myeloma (MM), communication via Notch signaling in the tumor niche stimulates tumor progression and bone destruction. We previously showed that osteocytes activate Notch, increase Notch3 expression, and stimulate proliferation in MM cells. We show here that Notch3 inhibition in MM cells reduced MM proliferation, decreased Rankl expression, and abrogated the ability of MM cells to promote osteoclastogenesis. Further, Notch3 inhibition in MM cells partially prevented the Notch activation and increased proliferation induced by osteocytes, demonstrating that Notch3 mediates MM-osteocyte communication. Consistently, pro-proliferative and pro-osteoclastogenic pathways were upregulated in CD138+ cells from newly diagnosed MM patients with high vs. low NOTCH3 expression. These results show that NOTCH3 signaling in MM cells stimulates proliferation and increases their osteoclastogenic potential. In contrast, Notch2 inhibition did not alter MM cell proliferation or communication with osteocytes. Lastly, mice injected with Notch3 knock-down MM cells had a 50% decrease in tumor burden and a 50% reduction in osteolytic lesions than mice bearing control MM cells. Together, these findings identify Notch3 as a mediator of cell communication among MM cells and between MM cells and osteocytes in the MM tumor niche and warrant future studies to exploit Notch3 as a therapeutic target to treat MM.
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Affiliation(s)
- Hayley M Sabol
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Tânia Amorim
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Cody Ashby
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, United States; Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, United States
| | - David Halladay
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Judith Anderson
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Meloney Cregor
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Megan Sweet
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Intawat Nookaew
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, United States; Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Noriyoshi Kurihara
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - G David Roodman
- Medicine, Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Teresita Bellido
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States; Central Arkansas Veterans Healthcare System, Little Rock, AR, United States; Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Jesus Delgado-Calle
- Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States; Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, United States.
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11
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Abstract
Osteocytes, former osteoblasts encapsulated by mineralized bone matrix, are far from being passive and metabolically inactive bone cells. Instead, osteocytes are multifunctional and dynamic cells capable of integrating hormonal and mechanical signals and transmitting them to effector cells in bone and in distant tissues. Osteocytes are a major source of molecules that regulate bone homeostasis by integrating both mechanical cues and hormonal signals that coordinate the differentiation and function of osteoclasts and osteoblasts. Osteocyte function is altered in both rare and common bone diseases, suggesting that osteocyte dysfunction is directly involved in the pathophysiology of several disorders affecting the skeleton. Advances in osteocyte biology initiated the development of novel therapeutics interfering with osteocyte-secreted molecules. Moreover, osteocytes are targets and key distributors of biological signals mediating the beneficial effects of several bone therapeutics used in the clinic. Here we review the most recent discoveries in osteocyte biology demonstrating that osteocytes regulate bone homeostasis and bone marrow fat via paracrine signaling, influence body composition and energy metabolism via endocrine signaling, and contribute to the damaging effects of diabetes mellitus and hematologic and metastatic cancers in the skeleton.
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Affiliation(s)
- Jesus Delgado-Calle
- 1Department of Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas,2Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Teresita Bellido
- 1Department of Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas,2Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas,3Central Arkansas Veterans Healthcare System, Little Rock, Arkansas
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12
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Oliveira CS, Leeuwenburgh S, Mano JF. New insights into the biomimetic design and biomedical applications of bioengineered bone microenvironments. APL Bioeng 2021; 5:041507. [PMID: 34765857 PMCID: PMC8568480 DOI: 10.1063/5.0065152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 10/06/2021] [Indexed: 12/31/2022] Open
Abstract
The bone microenvironment is characterized by an intricate interplay between cellular and noncellular components, which controls bone remodeling and repair. Its highly hierarchical architecture and dynamic composition provide a unique microenvironment as source of inspiration for the design of a wide variety of bone tissue engineering strategies. To overcome current limitations associated with the gold standard for the treatment of bone fractures and defects, bioengineered bone microenvironments have the potential to orchestrate the process of bone regeneration in a self-regulated manner. However, successful approaches require a strategic combination of osteogenic, vasculogenic, and immunomodulatory factors through a synergic coordination between bone cells, bone-forming factors, and biomaterials. Herein, we provide an overview of (i) current three-dimensional strategies that mimic the bone microenvironment and (ii) potential applications of bioengineered microenvironments. These strategies range from simple to highly complex, aiming to recreate the architecture and spatial organization of cell-cell, cell-matrix, and cell-soluble factor interactions resembling the in vivo microenvironment. While several bone microenvironment-mimicking strategies with biophysical and biochemical cues have been proposed, approaches that exploit the ability of the cells to self-organize into microenvironments with a high regenerative capacity should become a top priority in the design of strategies toward bone regeneration. These miniaturized bone platforms may recapitulate key characteristics of the bone regenerative process and hold great promise to provide new treatment concepts for the next generation of bone implants.
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Affiliation(s)
- Cláudia S. Oliveira
- Department of Chemistry, CICECO–Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Sander Leeuwenburgh
- Department of Dentistry-Regenerative Biomaterials, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - João F. Mano
- Department of Chemistry, CICECO–Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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13
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Sabol HM, Ferrari AJ, Adhikari M, Amorim T, McAndrews K, Anderson J, Vigolo M, Lehal R, Cregor M, Khan S, Cuevas PL, Helms JA, Kurihara N, Srinivasan V, Ebetino FH, Boeckman RK, Roodman GD, Bellido T, Delgado-Calle J. Targeting Notch inhibitors to the myeloma bone marrow niche decreases tumor growth and bone destruction without gut toxicity. Cancer Res 2021; 81:5102-5114. [PMID: 34348968 DOI: 10.1158/0008-5472.can-21-0524] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 06/04/2021] [Accepted: 08/02/2021] [Indexed: 11/16/2022]
Abstract
Systemic inhibition of Notch with γ-secretase inhibitors (GSI) decreases multiple myeloma (MM) tumor growth, but the clinical use of GSI is limited due to its severe gastrointestinal toxicity. In this study, we generated a GSI Notch inhibitor specifically directed to the bone (BT-GSI). BT-GSI administration decreased Notch target gene expression in the bone marrow, but it did not alter Notch signaling in intestinal tissue or induce gut toxicity. In mice with established human or murine MM, treatment with BT-GSI decreased tumor burden and prevented the progression of MM-induced osteolytic disease by inhibiting bone resorption more effectively than unconjugated GSI at equimolar doses. These findings show that BT-GSI has dual anti-myeloma and anti-restorative properties, supporting the therapeutic approach of bone-targeted Notch inhibition for the treatment of MM and associated bone disease.
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Affiliation(s)
- Hayley M Sabol
- Physiology and Cell Biology, University of Arkansas for Medical Sciences
| | - Adam J Ferrari
- Medicine, Hematology/Oncology, Indiana University School of Medicine
| | - Manish Adhikari
- Phyiology and Cell Biology, University of Arkansas for Medical Sciences
| | - Tânia Amorim
- Medicine, Hematology/Oncology, Indiana University School of Medicine
| | | | - Judith Anderson
- Department of Medicine, Division of Hematology-Oncology, Indiana University Bloomington
| | | | | | - Meloney Cregor
- Phyiology and Biophysics, University of Arkansas for Medical Sciences
| | - Sharmin Khan
- Phyiology and Cell Biology, University of Arkansas for Medical Sciences
| | - Pedro L Cuevas
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine
| | - Jill A Helms
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine
| | | | | | | | | | | | - Teresita Bellido
- Phyiology and Cell Biology, University of Arkansas for Medical Sciences
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14
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Hammel JH, Cook SR, Belanger MC, Munson JM, Pompano RR. Modeling Immunity In Vitro: Slices, Chips, and Engineered Tissues. Annu Rev Biomed Eng 2021; 23:461-491. [PMID: 33872520 PMCID: PMC8277680 DOI: 10.1146/annurev-bioeng-082420-124920] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Modeling immunity in vitro has the potential to be a powerful tool for investigating fundamental biological questions, informing therapeutics and vaccines, and providing new insight into disease progression. There are two major elements to immunity that are necessary to model: primary immune tissues and peripheral tissues with immune components. Here, we systematically review progress made along three strategies to modeling immunity: ex vivo cultures, which preserve native tissue structure; microfluidic devices, which constitute a versatile approach to providing physiologically relevant fluid flow and environmental control; and engineered tissues, which provide precise control of the 3D microenvironment and biophysical cues. While many models focus on disease modeling, more primary immune tissue models are necessary to advance the field. Moving forward, we anticipate that the expansion of patient-specific models may inform why immunity varies from patient to patient and allow for the rapid comprehension and treatment of emerging diseases, such as coronavirus disease 2019.
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Affiliation(s)
- Jennifer H Hammel
- Fralin Biomedical Research Institute and Department of Biomedical Engineering and Mechanics, Virginia Tech, Roanoke, Virginia 24016, USA;
| | - Sophie R Cook
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Maura C Belanger
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Jennifer M Munson
- Fralin Biomedical Research Institute and Department of Biomedical Engineering and Mechanics, Virginia Tech, Roanoke, Virginia 24016, USA;
| | - Rebecca R Pompano
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, USA;
- Carter Immunology Center and UVA Cancer Center, University of Virginia School of Medicine, Charlottesville, Virginia 22903, USA
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15
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Gomes PS, Pinheiro B, Colaço B, Fernandes MH. The Osteogenic Assessment of Mineral Trioxide Aggregate-based Endodontic Sealers in an Organotypic Ex Vivo Bone Development Model. J Endod 2021; 47:1461-1466. [PMID: 34126159 DOI: 10.1016/j.joen.2021.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/27/2021] [Accepted: 06/05/2021] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Mineral trioxide aggregate (MTA)-based sealers are endodontic materials with widespread success in distinct clinical applications, potentially embracing direct contact with the bone tissue. Bone response to these materials has been traditionally addressed in vitro. Nonetheless, translational data are limited by the absence of native cell-to-cell and cell-to-matrix interactions that hinder the representativeness of the analysis. Ex vivo organotypic systems, relying on the culture of explanted biological tissues, preserve the cell/tissue composition, reproducing the spatial and organizational in situ complexity. This study was grounded on an innovative research approach, relying on the assessment of an ex vivo organotypic bone tissue culture system to address the osteogenic response to 3 distinct MTA-based sealers. METHODS Embryonic chick femurs were isolated and grown ex vivo for 11 days in the presence of MTA Plus (Avalon Biomed Inc, Bradenton, FL), ProRoot MTA (Dentsply Tulsa Dental, Hohnson City, Germany), Biodentine (Septodont, Saint Maurdes Fosses, France), or AH Plus (Dentsply Sirona, Konstanz, Germany); the latter was used as a control material. Femurs were characterized by histologic, histochemical, and histomorphometric analysis. Gene expression assessment of relevant osteogenic markers was conducted by quantitative polymerase chain reaction. RESULTS All MTA-based sealers presented an enhanced osteogenic performance compared with AH Plus. Histochemical and histomorphometric analyses support the increased activation of the osteogenic program by MTA-based sealers, with enhanced collagenous matrix deposition and tissue mineralization. Gene expression analysis supported the enhanced activation of the osteogenic program. Comparatively, ProRoot MTA induced the highest osteogenic functionality on the characterized femurs. CONCLUSIONS MTA-based sealers enhanced the osteogenic activity within the assayed organotypic bone model, which was found to be a sensitive system for the assessment of osteogenic modulation mediated by endodontic sealers.
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Affiliation(s)
- Pedro S Gomes
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Porto, Portugal; Associated Laboratory for Green Chemistry/Network of Chemistry and Technology (LAQV/REQUIMTE), University of Porto, Porto, Portugal.
| | - Bruna Pinheiro
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Porto, Portugal
| | - Bruno Colaço
- Department of Zootechnics, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal; Center for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Maria H Fernandes
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Porto, Portugal; Associated Laboratory for Green Chemistry/Network of Chemistry and Technology (LAQV/REQUIMTE), University of Porto, Porto, Portugal
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16
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Bock N, Kryza T, Shokoohmand A, Röhl J, Ravichandran A, Wille ML, Nelson CC, Hutmacher DW, Clements JA. In vitro engineering of a bone metastases model allows for study of the effects of antiandrogen therapies in advanced prostate cancer. SCIENCE ADVANCES 2021; 7:eabg2564. [PMID: 34193425 PMCID: PMC8245033 DOI: 10.1126/sciadv.abg2564] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/17/2021] [Indexed: 05/05/2023]
Abstract
While androgen-targeted therapies are routinely used in advanced prostate cancer (PCa), their effect is poorly understood in treating bone metastatic lesions and ultimately results in the development of metastatic castrate resistant prostate cancer (mCRPC). Here, we used an all-human microtissue-engineered model of mineralized metastatic tissue combining human osteoprogenitor cells, 3D printing and prostate cancer cells, to assess the effects of the antiandrogens, bicalutamide, and enzalutamide in this microenvironment. We demonstrate that cancer/bone stroma interactions and antiandrogens drive cancer progression in a mineralized microenvironment. Probing the bone microenvironment with enzalutamide led to stronger cancer cell adaptive responses and osteomimicry than bicalutamide. Enzalutamide presented with better treatment response, in line with enzalutamide delaying time to bone-related events and enzalutamide extending survival in mCRPC. The all-human microtissue-engineered model of mineralized metastatic tissue presented here represents a substantial advance to dissect the role of the bone tumor microenvironment and responses to therapies for mCPRC.
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Affiliation(s)
- Nathalie Bock
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
- Centre in Regenerative Medicine, IHBI, QUT, Kelvin Grove, 4059 QLD, Australia
- Australian Research Council (ARC) Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (M3D Innovation), QUT, Kelvin Grove, 4059 QLD, Australia
| | - Thomas Kryza
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
| | - Ali Shokoohmand
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
- Centre in Regenerative Medicine, IHBI, QUT, Kelvin Grove, 4059 QLD, Australia
| | - Joan Röhl
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
| | - Akhilandeshwari Ravichandran
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
- Centre in Regenerative Medicine, IHBI, QUT, Kelvin Grove, 4059 QLD, Australia
| | - Marie-Luise Wille
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Australian Research Council (ARC) Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (M3D Innovation), QUT, Kelvin Grove, 4059 QLD, Australia
- Bone and Joint Disorders Program, School of Mechanical Medical, and Process Engineering, Science and Engineering Faculty (SEF), QUT, Brisbane, 4000 QLD, Australia
| | - Colleen C Nelson
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
| | - Dietmar W Hutmacher
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia.
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
- Centre in Regenerative Medicine, IHBI, QUT, Kelvin Grove, 4059 QLD, Australia
- Australian Research Council (ARC) Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (M3D Innovation), QUT, Kelvin Grove, 4059 QLD, Australia
- Bone and Joint Disorders Program, School of Mechanical Medical, and Process Engineering, Science and Engineering Faculty (SEF), QUT, Brisbane, 4000 QLD, Australia
- ARC Training Centre in Additive Biomanufacturing, QUT, Kelvin Grove, 4059 QLD, Australia
| | - Judith A Clements
- School of Biomedical Sciences, Faculty of Health and Australian Prostate Cancer Research Centre (APCRC-Q), Brisbane 4000, QLD, Australia.
- Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Brisbane 4000, QLD, Australia
- Translational Research Institute (TRI), QUT, Woolloongabba, 4102 QLD, Australia
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Abstract
PURPOSE OF REVIEW Novel therapies for damaged and diseased bone are being developed in a preclinical testing process consisting of in vitro cell experiments followed by in vivo animal studies. The in vitro results are often not representative of the results observed in vivo. This could be caused by the complexity of the natural bone environment that is missing in vitro. Ex vivo bone explant cultures provide a model in which cells are preserved in their native three-dimensional environment. Herein, it is aimed to review the current status of bone explant culture models in relation to their potential in complementing the preclinical evaluation process with specific attention paid to the incorporation of mechanical loading within ex vivo culture systems. RECENT FINDINGS Bone explant cultures are often performed with physiologically less relevant bone, immature bone, and explants derived from rodents, which complicates translatability into clinical practice. Mature bone explants encounter difficulties with maintaining viability, especially in static culture. The integration of mechanical stimuli was able to extend the lifespan of explants and to induce new bone formation. Bone explant cultures provide unique platforms for bone research and mechanical loading was demonstrated to be an important component in achieving osteogenesis ex vivo. However, more research is needed to establish a representative, reliable, and reproducible bone explant culture system that includes both components of bone remodeling, i.e., formation and resorption, in order to bridge the gap between in vitro and in vivo research in preclinical testing.
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Affiliation(s)
- E E A Cramer
- Orthopaedic Biomechanics, Department of Biomedical Engineering and Institute of Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - K Ito
- Orthopaedic Biomechanics, Department of Biomedical Engineering and Institute of Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - S Hofmann
- Orthopaedic Biomechanics, Department of Biomedical Engineering and Institute of Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands.
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18
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Park Y, Cheong E, Kwak JG, Carpenter R, Shim JH, Lee J. Trabecular bone organoid model for studying the regulation of localized bone remodeling. SCIENCE ADVANCES 2021; 7:eabd6495. [PMID: 33523925 PMCID: PMC7817107 DOI: 10.1126/sciadv.abd6495] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 12/02/2020] [Indexed: 05/08/2023]
Abstract
Trabecular bone maintains physiological homeostasis and consistent structure and mass through repeated cycles of bone remodeling by means of tightly localized regulation. The molecular and cellular processes that regulate localized bone remodeling are poorly understood because of a lack of relevant experimental models. A tissue-engineered model is described here that reproduces bone tissue complexity and bone remodeling processes with high fidelity and control. An osteoid-inspired biomaterial-demineralized bone paper-directs osteoblasts to deposit structural mineralized bone tissue and subsequently acquire the resting-state bone lining cell phenotype. These cells activate and shift their secretory profile to induce osteoclastogenesis in response to chemical stimulation. Quantitative spatial mapping of cellular activities in resting and activated bone surface coculture showed that the resting-state bone lining cell network actively directs localized bone remodeling by means of paracrine signaling and cell-to-cell contact. This model may facilitate further investigation of trabecular bone niche biology.
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Affiliation(s)
- Yongkuk Park
- Department of Chemical Engineering, Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA 01003, USA
| | - Eugene Cheong
- Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, MA 01003, USA
| | - Jun-Goo Kwak
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, MA 01003, USA
| | - Ryan Carpenter
- Department of Chemical Engineering, Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA 01003, USA
| | - Jae-Hyuck Shim
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Jungwoo Lee
- Department of Chemical Engineering, Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA 01003, USA.
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, MA 01003, USA
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Kim S, Lee M. Rational design of hydrogels to enhance osteogenic potential. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2020; 32:9508-9530. [PMID: 33551566 PMCID: PMC7857485 DOI: 10.1021/acs.chemmater.0c03018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Bone tissue engineering (BTE) encompasses the field of biomaterials, cells, and bioactive molecules to successfully guide the growth and repair of bone tissue. Current BTE strategies rely on delivering osteogenic molecules or cells via scaffolding materials. However, growth factor- and stem cell-based treatments have several limitations, such as source restriction, low stability, difficulties in predicting long-term efficacy, and high costs, among others. These issues have promoted the development of material-based therapy with properties of accessibility, high stability, tunable efficacy, and low-cost production. Hydrogels are widely used in BTE applications because of their unique hydrophilic nature and tunable physicochemical properties to mimic the native bone environment. However, current hydrogel materials are not ideal candidates due to minimal osteogenic capability on their own. Therefore, recent studies of BTE hydrogels attempt to counterbalance these issues by modifying their biophysical properties. In this article, we review recent progress in the design of hydrogels to instruct osteogenic potential, and present strategies developed to precisely control its bone healing properties.
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Affiliation(s)
- Soyon Kim
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Min Lee
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA
- Department of Bioengineering, University of California, Los Angeles, USA
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20
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Abstract
The aim of this review was to compile a list of tools currently available to study bone cells and in particular osteocytes. As the interest (and importance) in osteocyte biology has greatly expanded over the past decade, new tools and techniques have become available to study these elusive cells, RECENT FINDINGS: Osteocytes are the main orchestrators of bone remodeling. They control both osteoblasts and osteoclast activities via cell-to cell communication or through secreted factors. Osteocytes are also the mechanosensors of the bone and they orchestrate skeletal adaptation to loads. Recent discoveries have greatly expanded our knowledge and understanding of these cells and new models are now available to further uncover the functions of osteocytes. Novel osteocytic cell lines, primary cultures, and 3D scaffolds are now available to investigators to further unravel the functions and roles of these cells.
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Affiliation(s)
- Paola Divieti Pajevic
- Translational Dental Medicine, Boston University Henry M. Goldman School of Dental Medicine, 700 Albany Street, W201E, Boston, MA, 02118, USA.
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21
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Use of in vitro bone models to screen for altered bone metabolism, osteopathies, and fracture healing: challenges of complex models. Arch Toxicol 2020; 94:3937-3958. [PMID: 32910238 PMCID: PMC7655582 DOI: 10.1007/s00204-020-02906-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/03/2020] [Indexed: 02/06/2023]
Abstract
Approx. every third hospitalized patient in Europe suffers from musculoskeletal injuries or diseases. Up to 20% of these patients need costly surgical revisions after delayed or impaired fracture healing. Reasons for this are the severity of the trauma, individual factors, e.g, the patients’ age, individual lifestyle, chronic diseases, medication, and, over 70 diseases that negatively affect the bone quality. To investigate the various disease constellations and/or develop new treatment strategies, many in vivo, ex vivo, and in vitro models can be applied. Analyzing these various models more closely, it is obvious that many of them have limits and/or restrictions. Undoubtedly, in vivo models most completely represent the biological situation. Besides possible species-specific differences, ethical concerns may question the use of in vivo models especially for large screening approaches. Challenging whether ex vivo or in vitro bone models can be used as an adequate replacement for such screenings, we here summarize the advantages and challenges of frequently used ex vivo and in vitro bone models to study disturbed bone metabolism and fracture healing. Using own examples, we discuss the common challenge of cell-specific normalization of data obtained from more complex in vitro models as one example of the analytical limits which lower the full potential of these complex model systems.
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Laranga R, Duchi S, Ibrahim T, Guerrieri AN, Donati DM, Lucarelli E. Trends in Bone Metastasis Modeling. Cancers (Basel) 2020; 12:E2315. [PMID: 32824479 PMCID: PMC7464021 DOI: 10.3390/cancers12082315] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 12/12/2022] Open
Abstract
Bone is one of the most common sites for cancer metastasis. Bone tissue is composed by different kinds of cells that coexist in a coordinated balance. Due to the complexity of bone, it is impossible to capture the intricate interactions between cells under either physiological or pathological conditions. Hence, a variety of in vivo and in vitro approaches have been developed. Various models of tumor-bone diseases are routinely used to provide valuable information on the relationship between metastatic cancer cells and the bone tissue. Ideally, when modeling the metastasis of human cancers to bone, models would replicate the intra-tumor heterogeneity, as well as the genetic and phenotypic changes that occur with human cancers; such models would be scalable and reproducible to allow high-throughput investigation. Despite the continuous progress, there is still a lack of solid, amenable, and affordable models that are able to fully recapitulate the biological processes happening in vivo, permitting a correct interpretation of results. In the last decades, researchers have demonstrated that three-dimensional (3D) methods could be an innovative approach that lies between bi-dimensional (2D) models and animal models. Scientific evidence supports that the tumor microenvironment can be better reproduced in a 3D system than a 2D cell culture, and the 3D systems can be scaled up for drug screening in the same way as the 2D systems thanks to the current technologies developed. However, 3D models cannot completely recapitulate the inter- and intra-tumor heterogeneity found in patients. In contrast, ex vivo cultures of fragments of bone preserve key cell-cell and cell-matrix interactions and allow the study of bone cells in their natural 3D environment. Moreover, ex vivo bone organ cultures could be a better model to resemble the human pathogenic metastasis condition and useful tools to predict in vivo response to therapies. The aim of our review is to provide an overview of the current trends in bone metastasis modeling. By showing the existing in vitro and ex vivo systems, we aspire to contribute to broaden the knowledge on bone metastasis models and make these tools more appealing for further translational studies.
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Affiliation(s)
- Roberta Laranga
- Unit of Orthopaedic Pathology and Osteoarticular Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; (R.L.); (D.M.D.); (E.L.)
| | - Serena Duchi
- BioFab3D@ACMD, St Vincent’s Hospital, Melbourne, VIC 3065, Australia;
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Melbourne, VIC 3065, Australia
| | - Toni Ibrahim
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola, Italy;
| | - Ania Naila Guerrieri
- Unit of Orthopaedic Pathology and Osteoarticular Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; (R.L.); (D.M.D.); (E.L.)
| | - Davide Maria Donati
- Unit of Orthopaedic Pathology and Osteoarticular Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; (R.L.); (D.M.D.); (E.L.)
- Rizzoli Laboratory Unit, Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, Via di Barbiano 1/10, 40136 Bologna, Italy
- 3rd Orthopaedic and Traumatologic Clinic Prevalently Oncologic, IRCCS Istituto Ortopedico Rizzoli, Via Pupilli 1, 40136 Bologna, Italy
| | - Enrico Lucarelli
- Unit of Orthopaedic Pathology and Osteoarticular Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; (R.L.); (D.M.D.); (E.L.)
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23
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van Oirschot BAJA, Jansen JA, van de Ven CJJM, Geven EJW, Gossen JA. Evaluation of Collagen Membranes Coated with Testosterone and Alendronate to Improve Guided Bone Regeneration in Mandibular Bone Defects in Minipigs. J Oral Maxillofac Res 2020; 11:e4. [PMID: 33262883 PMCID: PMC7644271 DOI: 10.5037/jomr.2020.11304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/27/2020] [Indexed: 04/19/2023]
Abstract
OBJECTIVES The purpose of the present in vivo study was to evaluate whether pericard collagen membranes coated with ancillary amounts of testosterone and alendronate in a poly-lactic glycolic acid (PLGA) carrier as compared to uncoated membranes will improve early bone regeneration. MATERIAL AND METHODS In each of 16 minipigs, four standardized mandibular intraosseous defects were made bilaterally. The defects were filled with Bio-Oss® granules and covered with a non-coated or coated membrane. Membranes were spray-coated with 4 layers of PLGA containing testosterone and alendronate resulting in 20, 50 or 125 μg/cm2 of testosterone and 20 µg/cm2 alendronate (F20, F50, F125). Non-coated membranes served as controls (F0). Animals were sacrificed at 6 and 12 weeks after treatment. Qualitative and quantitative histological evaluations of bone regeneration were performed. Differences between groups were assessed by paired Student's t-test. RESULTS Light microscopical analysis showed new bone formation that was in close contact with the Bio-Oss® surface without an intervening non-mineralized tissue layer. Histomorphometric analysis of newly formed bone showed a significant 20% increase in area in the F125 coated membrane treated defects (40 [SD 10]%) compared to the F0 treated defects after 6 weeks (33 [SD 10]%, P = 0.013). At week 12, the total percentage of new bone was increased compared to week 6, but no increase in newly formed bone compared to F0 was observed. CONCLUSIONS The data from this in vivo study indicate that F125 collagen membranes coated with testosterone and alendronate resulted in superior bone formation (+24%) when normalized to control sites using uncoated membranes.
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Affiliation(s)
- Bart A J A van Oirschot
- Department of Dentistry - Biomaterials, Radboudumc, Radboud University Nijmegen, NijmegenThe Netherlands
| | - John A Jansen
- Department of Dentistry - Biomaterials, Radboudumc, Radboud University Nijmegen, NijmegenThe Netherlands
| | - Cindy J J M van de Ven
- Department of Dentistry - Biomaterials, Radboudumc, Radboud University Nijmegen, NijmegenThe Netherlands
- Osteo-Pharma BV, OssThe Netherlands
| | - Edwin J W Geven
- Department of Dentistry - Biomaterials, Radboudumc, Radboud University Nijmegen, NijmegenThe Netherlands
- Osteo-Pharma BV, OssThe Netherlands
| | - Jan A Gossen
- Department of Dentistry - Biomaterials, Radboudumc, Radboud University Nijmegen, NijmegenThe Netherlands
- Osteo-Pharma BV, OssThe Netherlands
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24
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Rao SR, Edwards CM, Edwards JR. Modeling the Human Bone-Tumor Niche: Reducing and Replacing the Need for Animal Data. JBMR Plus 2020; 4:e10356. [PMID: 32258970 PMCID: PMC7117847 DOI: 10.1002/jbm4.10356] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 12/17/2022] Open
Abstract
Bone is the most common site for cancer metastasis. Understanding the interactions within the complex, heterogeneous bone-tumor microenvironment is essential for the development of new therapeutics. Various animal models of tumor-induced bone disease are routinely used to provide valuable information on the relationship between cancer cells and the skeleton. However, new model systems exist that offer an alternative approach to the use of animals and might more accurately reveal the cellular interactions occurring within the human bone-tumor niche. This review highlights replacement models that mimic the bone microenvironment and where cancer metastases and tumor growth might be assessed alongside bone turnover. Such culture models include the use of calcified regions of animal tissue and scaffolds made from bone mineral hydroxyapatite, synthetic polymers that can be manipulated during manufacture to create structures resembling trabecular bone surfaces, gel composites that can be modified for stiffness and porosity to resemble conditions in the tumor-bone microenvironment. Possibly the most accurate model system involves the use of fresh human bone samples, which can be cultured ex vivo in the presence of human tumor cells and demonstrate similar cancer cell-bone cell interactions as described in vivo. In addition, the use of mathematical modeling and computational biology approaches provide an alternative to preliminary animal testing. The use of such models offers the capacity to mimic significant elements of the human bone-tumor environment, and complement, refine, or replace the use of preclinical models. © 2020 The Authors. JBMR Plus published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Srinivasa R Rao
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK.,Nuffield Department of Surgical Sciences University of Oxford Oxford UK
| | - Claire M Edwards
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK.,Nuffield Department of Surgical Sciences University of Oxford Oxford UK
| | - James R Edwards
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK
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