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Jabari E, Choe RH, Kuzemchak B, Venable-Croft A, Choi JY, McLoughlin S, Packer JD, Fisher JP. Strategies for the Codelivery of Osteoclasts and Mesenchymal Stem Cells in 3D-Printable Osteochondral Scaffolds. Tissue Eng Part C Methods 2024; 30:323-334. [PMID: 39078319 DOI: 10.1089/ten.tec.2024.0162] [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] [Indexed: 07/31/2024] Open
Abstract
Osteochondral defects, characterized by structural compromises to articular cartilage and subchondral bone, can cause pain and lead to progressive cartilage damage and eventual osteoarthritis. Unfortunately, repairing these defects remains difficult because of the poor regenerative properties of cartilage and complex mechanical demands of the joint. As such, the field of tissue engineering aims to develop multiphasic implants that replace pathological cartilage and bone tissue and restore mechanical functionality to the joint. Recent bone physiology investigations have demonstrated that osteoclast (OC) lineage cells are inextricably involved in osteoblastic bone formation through an extensive network of anabolic signaling pathways, and so the codelivery OC and osteoblast (OB) lineage cells within scaffolds is being actively explored for bone tissue engineering purposes. However, it remains unclear how these cells can be incorporated into the design of multiphasic osteochondral scaffolds to potentially enhance subchondral bone formation and subsequent implant osseointegration. To explore this question, we examined direct surface seeding and hydrogel encapsulation as potential scaffold cellularization strategies. First, we examined how OC precursor cells and peripheral blood monocytes (PBMCs) influence early-stage bone matrix development and osteogenesis in 2D coculture. Then, we evaluated the osteogenic potential of mesenchymal stem cells (MSCs) and PBMCs cocultures encapsulated within a gelatin methacrylate (GelMA) hydrogel system. Our findings demonstrate that coculturing PBMCs with MSCs in 2D cultures significantly enhanced cell proliferation, early bone matrix deposition, and the formation of cell clusters by Day 28. However, we observed no significant difference in type I collagen deposition between GelMA hydrogel scaffolds cultured in basal and OC conditions during the same period. In addition, we found that the GelMA hydrogel system with MSC/PBMC cocultures in OC conditions exhibited decreased osteogenic activity by Day 28. Collectively, our findings support the osteogenic potential of OC-lineage cells in 2D culture conditions, and the potential benefits of surface-seeding for the codelivery of OC-lineage cells and MSCs in osteo-scaffolds for enhanced osteochondral regeneration and broader bone tissue engineering purposes.
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Affiliation(s)
- Erfan Jabari
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Robert H Choe
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Blake Kuzemchak
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Alejandro Venable-Croft
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Ji Young Choi
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Shannon McLoughlin
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
| | - Jonathan D Packer
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - John P Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland, USA
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Cramer EEA, de Wildt BWM, Hendriks JGE, Ito K, Hofmann S. Integration of osteoclastogenesis through addition of PBMCs in human osteochondral explants cultured ex vivo. Bone 2024; 178:116935. [PMID: 37852425 DOI: 10.1016/j.bone.2023.116935] [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: 08/11/2023] [Revised: 09/29/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
The preservation of tissue specific cells in their native 3D extracellular matrix in bone explants provides a unique platform to study remodeling. Thus far, studies involving bone explant cultures showed a clear focus on achieving bone formation and neglected osteoclast activity and resorption. To simulate the homeostatic bone environment ex vivo, both key elements of bone remodeling need to be represented. This study aimed to assess and include osteoclastogenesis in human osteochondral explants through medium supplementation with RANKL and M-CSF and addition of peripheral blood mononuclear cells (PBMCs), providing osteoclast precursors. Osteochondral explants were freshly harvested from human femoral heads obtained from hip surgeries and cultured for 20 days in a two-compartment culture system. Osteochondral explants preserved viability and cellular abundance over the culture period, but histology demonstrated that resident osteoclasts were no longer present after 4 days of culture. Quantitative extracellular tartrate resistant acid phosphatase (TRAP) analysis confirmed depletion of osteoclast activity on day 4 even when stimulated with RANKL and M-CSF. Upon addition of PBMCs, a significant upregulation of TRAP activity was measured from day 10 onwards. Evaluation of bone loss trough μCT registration and measurement of extracellular cathepsin K activity revealed indications of enhanced resorption upon addition of PBMCs. Based on the results we suggest that an external source of osteoclast precursors, such as PBMCs, needs to be added in long-term bone explant cultures to maintain osteoclastic activity, and bone remodeling.
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Affiliation(s)
- Esther 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
| | - Bregje W M de Wildt
- 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
| | - Johannes G E Hendriks
- Department of Orthopedic Surgery & Trauma, Máxima Medical Center Eindhoven/Veldhoven, 5631 BM Eindhoven, the Netherlands
| | - Keita 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
| | - Sandra 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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Nisha Y, Dubashi B, Bobby Z, Sahoo JP, Kayal S, Ananthakrishnan R, Reddy VB, L C, Ganesan P. Negative impact on bone homeostasis in postmenopausal women with non-metastatic breast cancer during cytotoxic chemotherapy. J Bone Miner Metab 2023; 41:682-692. [PMID: 37410202 DOI: 10.1007/s00774-023-01444-9] [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: 03/09/2023] [Accepted: 05/29/2023] [Indexed: 07/07/2023]
Abstract
INTRODUCTION The burden and mechanisms of endocrine therapy-related bone loss are well known, while there are limited data on chemotherapy-induced bone resorption. The study aimed to evaluate the effect of cytotoxic chemotherapy on bone homeostasis among postmenopausal women with non-metastatic breast cancer. MATERIALS AND METHODS Early and locally advanced postmenopausal non-metastatic breast cancer patients aged 45 to 65 planned for three cycles of anthracycline and four cycles of taxane chemotherapy administered along with dexamethasone (cumulative dose-256 mg) as an antiemetic from June 2018 to December 2021 were included. Bone mineral density (BMD), bone turnover markers, calciotropic hormones, pro-inflammatory cytokines, oxidative stress, and total antioxidant levels (TAS) were measured. RESULTS We recruited 109 patients, with early 34 (31.2%) and locally advanced breast cancer 75 (68.8%) with median age 53 (45-65) years. There was a significant decrease in the % BMD at the lumbar spine, neck of the femur, and total hip post-chemotherapy. There was a significant increase in serum C-terminal telopeptide of type I collagen (CTX) and procollagen type I N-terminal propeptide (PINP) levels post-chemotherapy. PINP/CTX ratio significantly decreased post-chemotherapy. Serum 25-OH vitamin D was significantly reduced with a compensatory increase in plasma iPTH levels. The change in CTX, PINP/CTX ratio, 25-OH vitamin D, iPTH, and oxidative stress index was more pronounced during anthracycline as taxane chemotherapy. There were no significant changes in pro-inflammatory cytokine levels. CONCLUSION Chemotherapy and dexamethasone as antiemetic resulted in significant bone loss, as evidenced by bone turnover markers. Further studies are required to understand the mechanism of chemotherapy-induced bone loss and the need for bone-strengthening agents during chemotherapy.
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Affiliation(s)
- Yadav Nisha
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Biswajit Dubashi
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India.
| | - Zachariah Bobby
- Department of Biochemistry, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Jaya Prakash Sahoo
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Smita Kayal
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Ramesh Ananthakrishnan
- Department of Radiodiagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Vijay Bhaskar Reddy
- Department of Endocrinology, Vijay Diabetes, Thyroid and Endocrine Clinic, Saradambal Nagar, Puducherry, India
| | - Charles L
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Prasanth Ganesan
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
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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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Shymanskyi I, Lisakovska O, Mazanova A, Labudzynskyi D, Veliky M. Vitamin D 3 Modulates Impaired Crosstalk Between RANK and Glucocorticoid Receptor Signaling in Bone Marrow Cells After Chronic Prednisolone Administration. Front Endocrinol (Lausanne) 2018; 9:303. [PMID: 29930537 PMCID: PMC5999729 DOI: 10.3389/fendo.2018.00303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/22/2018] [Indexed: 01/09/2023] Open
Abstract
The effectiveness of vitamin D3 (cholecalciferol) in counteracting the side effects of glucocorticoid (GC) therapy has been demonstrated previously. Abnormalities in systemic hormonal and local (cytokine) regulation of bone marrow (BM) cells may underlie GC-induced imbalance between osteosynthesis and bone resorption. The cytokine system receptor activator of nuclear factor kappa-B (RANK)/RANK ligand (RANKL)/osteoprotegerin (OPG) is considered as an integrating link in the NF-κB-mediated interaction of various cells involved in maintaining osteoblastic-osteoclastic balance, which makes it a pharmacological target for regulation and correction of the bone remodeling process. We studied GC-induced impairments of the RANKL/RANK/OPG axis in BM cells depending on vitamin D bioavailability and whether these changes were mediated by glucocorticoid (GR) and/or vitamin D (VDR) receptors. Female Wistar rats administered with prednisolone (5 mg/kg b.w., 30 days) showed a decrease in the GR protein level and the number of GR-positive BM cells. GC caused a marked elevation of RANKL and RANK levels in BM, while OPG decreased. Flow cytometry data indicated GC-elicited increase in the number of circulating RANK-positive osteoclast precursors (OCPs) in BM, peripheral blood, and spleen. In full accordance with the data that the interaction of RANKL-RANK leads to transcriptional activation of NF-κB and subsequent differentiation of osteoclasts, we found an increase in the level of phosphorylated p65 subunit of NF-κB with a simultaneous decrease in the NF-κB inhibitor (IκB) level. These changes were accompanied by vitamin D insufficiency and downregulated expression of CYP27B1 and VDR, which are responsible for synthesis and hormonal signaling of 1,25(OH)2D. Notably, we observed VDR and RANK co-localization in OCPs. Cholecalciferol co-administration (1,000 IU/kg b.w., 30 days) with prednisolone resulted in elevated GR synthesis in BM. Cholecalciferol prevented prednisolone-elicited disturbances of the RANKL/RANK/OPG, which correlated with improved bioavailability and vitamin D signaling through VDR. This caused the lowering of phosphoNF-κB p65 level and inhibiting NF-κB translocation to the nucleus that could reduce the circulating OCPs pool in BM, peripheral blood, and spleen. Our findings suggest that prednisolone-induced abnormalities in GR and RANKL/RANK/OPG signaling pathways are associated with the impairments of vitamin D auto/paracrine system in BM cells and can be ameliorated by cholecalciferol supplementation.
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Manrique E, Castillo LM, Lazala O, Guerrero CA, Acosta O. Bone resorptive activity of human peripheral blood mononuclear cells after fusion with polyethylene glycol. J Bone Miner Metab 2017; 35:127-141. [PMID: 26969392 DOI: 10.1007/s00774-016-0744-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 01/25/2016] [Indexed: 01/28/2023]
Abstract
The bone remodeling process occurs through bone formation by osteoblasts and bone resorption by osteoclasts, a process involving the contribution of endocrine and nervous systems. The mechanisms associated to differentiation and proliferation of osteoclasts and osteoblasts are considered a potential therapeutic target for treating some erosive bone diseases. The aim of the present study is to explore the feasibility of generating active osteoclast-like cells from peripheral blood mononuclear cells (PBMCs) following polyethylene glycol (PEG)-induced fusion. PEG-fused PBMCs showed TRAP+-multinucleated cells and bone resorption activity, and were also positive for osteoclast markers such as carbonic anhydrase II, calcitonin receptor, vacuolar ATPase, and cathepsin K, when examined by reverse transcription-polymerase chain reaction, immunochemistry and Western blotting. TRAP expression and bone resorptive activity were higher in whole PEG-fused PBMCs than in separated T lymphocytes, B lymphocytes or monocytes. Both TRAP expression and bone resorptive activity were also higher in osteogenesis imperfecta patients compared to PEG-fused PBMCs from healthy individuals. PEG-induced fusion was more efficient in inducing TRAP and bone resorptive activities than macrophage colony-stimulating factor or dexamethasone treatment. Bone resorptive activity of PEG-fused PMBCs was inhibited by bisphosphonates. Evidence is provided that the use of PEG-based cell fusion is a straightforward and amenable method for studying human osteoclast differentiation and testing new therapeutic strategies.
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Affiliation(s)
- Edwin Manrique
- Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá, Colombia
| | - Luz M Castillo
- Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá, Colombia
| | - Oswaldo Lazala
- Departamento de Ortopedia, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Carlos A Guerrero
- Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá, Colombia.
| | - Orlando Acosta
- Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá, Colombia
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Ansari MM, Khan HA. Yohimbine hydrochloride ameliorates collagen type-II-induced arthritis targeting oxidative stress and inflammatory cytokines in Wistar rats. ENVIRONMENTAL TOXICOLOGY 2017; 32:619-629. [PMID: 27028940 DOI: 10.1002/tox.22264] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/08/2016] [Accepted: 03/08/2016] [Indexed: 06/05/2023]
Abstract
Rheumatoid arthritis (RA) is the most common type of chronic inflammatory disease which is triggered by dysfunction in the immune system which in turn affects synovial joints. Current treatment of RA with NSAIDs and DMRDs is limited by their side effect. As a result, the interest in alternative, well tolerated anti-inflammatory remedies has re-emerged. Our aim was to evaluate the antioxidant and anti-inflammatory activities underlying the anti-RA effect of Yohimbine hydrochloride (YCL) in collagen induced arthritis (CIA) in Wistar rats. The YCL was administered at doses of 5 and 10 mg kg-1 body weight once daily for 28 days. The effects of treatment in the rats were assessed by biochemical parameter (articular elastase, LPO, GSH, catalase, SOD), hematological parameter (ESR, WBC, C-reactive protein (CRP), immunohistochemical expression (COX2, TNF-α, and NF-κB), and histological changes in joints. YCL showed anti-RA efficacy as it significantly reduced articular elastase, LPO and catalase level and ameliorates histological changes. This is in addition to its antioxidant efficacy as YCL shown a significant increase in GSH and SOD level. Also, YCL showed effective anti-inflammatory activity as it significantly decreased the expression of COX-2, TNF-α, and NF-ĸB. The therapeutic effect of YCL against RA was also evident from lower arthritis scoring and reduced hematological parameter (ESR, WBC, and C-reactive protein level). The abilities to inhibit proinflammatory cytokines and modulation of antioxidant states that the protective effect of YCL on arthritis rats might be mediated via the modulation of the immune system. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 619-629, 2017.
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Affiliation(s)
- Md Meraj Ansari
- Heavy Metal and Clinical Toxicology Laboratory, Department of Medical Elementology and Toxicology, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
| | - Haider A Khan
- Heavy Metal and Clinical Toxicology Laboratory, Department of Medical Elementology and Toxicology, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
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Neha, Ansari MM, Khan HA. Deflazacort alleviate pro-inflammatory cytokines expression, oxidative stress and histopathological alterations in collagen induced arthritis in Wistar rats. INDIAN JOURNAL OF RHEUMATOLOGY 2014. [DOI: 10.1016/j.injr.2014.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Kruppel-like factor 4 expression in osteoblasts represses osteoblast-dependent osteoclast maturation. Cell Tissue Res 2014; 358:177-87. [PMID: 24927920 DOI: 10.1007/s00441-014-1931-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 05/22/2014] [Indexed: 01/08/2023]
Abstract
Kruppel-like factor 4 (KLF4) is a zinc-finger-type transcription factor with a restricted expression pattern during skeletal development. We have previously shown that KLF4 represses osteoblast mineralization concomitant with a down-regulation in the expression of a number of osteoblastic genes, both in vivo and in vitro. In addition to the cell-autonomous effects of KLF4 in osteoblasts, transgenic osteoblastic-KLF4 mice show severe defects in osteoclast maturation. Wild-type bone-marrow-derived macrophages co-cultured with KLF4-expressing osteoblasts exhibit reduced formation of multinuclear osteoclasts as compared with control cultures overexpressing green fluorescent protein. Significantly, the transduction of Runx2, a master regulator of osteoblastogenesis, together with KLF4 into osteoblasts restores the reduction in osteoclastogenesis induced by KLF4 alone. Various extracellular matrix molecules are down-regulated by KLF4 overexpression but this down-regulation can be partially restored by the co-transduction of Runx2. These results suggest that osteoblastic-KLF4 affects osteoclast maturation by regulating cell-matrix interactions and reinforce the importance of the regional down-regulation of KLF4 expression in the subset of osteoblasts for normal skeletal modeling and remodeling.
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Lozano D, Fernández-de-Castro L, Portal-Núñez S, López-Herradón A, Dapía S, Gómez-Barrena E, Esbrit P. The C-terminal fragment of parathyroid hormone-related peptide promotes bone formation in diabetic mice with low-turnover osteopaenia. Br J Pharmacol 2011; 162:1424-38. [PMID: 21175568 DOI: 10.1111/j.1476-5381.2010.01155.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE Current data suggest that parathyroid hormone (PTH)-related peptide (PTHrP) domains other than the N-terminal PTH-like domain contribute to its role as an endogenous bone anabolic factor. PTHrP-107-139 inhibits bone resorption, a fact which has precluded an unequivocal demonstration of its possible anabolic action in vivo. We thus sought to characterize the osteogenic effects of this peptide using a mouse model of diabetic low-turnover osteopaenia. EXPERIMENTAL APPROACH PTHrP-107-139 was administered to streptozotocin-induced diabetic mice, with or without bone marrow ablation, for 13 days. Osteopaenia was confirmed by dual-energy X-ray absorptiometry and microcomputed tomography analysis. Histological analysis was performed on paraffin-embedded bone tissue sections by haematoxylin/eosin and Masson's staining, and tartrate-resistent acid phosphatase immunohistochemistry. Mouse bone marrow stromal cells and osteoblastic MC3T3-E1 cells were cultured in normal and/or high glucose (HG) medium. Osteogenic and adipogenic markers were assessed by real-time PCR, and PTHrP and the PTH(1) receptor protein expression by Western blot analysis. KEY RESULTS PTHrP-107-139 reversed the alterations in bone structure and osteoblast function, and also promoted bone healing after marrow ablation without affecting the number of osteoclast-like cells in diabetic mice. This peptide also reversed the high-glucose-induced changes in osteogenic differentiation in both bone marrow stromal cells and the more differentiated MC3T3-E1 cells. CONCLUSIONS AND IMPLICATIONS These findings demonstrate that PTHrP-107-139 promotes bone formation in diabetic mice. This mouse model and in vitro cell cultures allowed us to identify various anabolic effects of this peptide in this scenario.
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Affiliation(s)
- D Lozano
- Laboratorio de Metabolismo Mineral y Óseo, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz, Madrid, Spain
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Abstract
Glucocorticoids (GCs) are useful drugs for the treatment of various diseases, but their use for prolonged periods can cause severe side effects such as osteoporosis. GCs have a direct effect on bone cells, where they can arrest bone formation, in part through the inhibition of osteoblast. On the other hand, GCs potently suppress osteoclast resorptive activity by disrupting its cytoskeleton based on the inhibition of RhoA, Rac and Vav3 in response to macrophage colony-stimulating factor. GCs also interfere with microtubule distribution and stability, which are critical for cytoskeletal organization in osteoclasts. Thus, GCs inhibit microtubule-dependent cytoskeletal organization in osteoclasts, which, in the context of bone remodeling, further dampens bone formation.
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Affiliation(s)
- Hyun-Ju Kim
- Skeletal Diseases Genome Research Center, Department of Medicine, Kyungpook National University School of Medicine, Daegu 700-422, Korea.
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Bernhardt A, Thieme S, Domaschke H, Springer A, Rösen-Wolff A, Gelinsky M. Crosstalk of osteoblast and osteoclast precursors on mineralized collagen-towards an in vitro model for bone remodeling. J Biomed Mater Res A 2010; 95:848-56. [DOI: 10.1002/jbm.a.32856] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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de Castro LF, Lozano D, Dapía S, Portal-Núñez S, Caeiro JR, Gómez-Barrena E, Esbrit P. Role of the N- and C-terminal Fragments of Parathyroid-Hormone-Related Protein as Putative Therapies to Improve Bone Regeneration Under High Glucocorticoid Treatment. Tissue Eng Part A 2010; 16:1157-68. [DOI: 10.1089/ten.tea.2009.0355] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
| | - Daniel Lozano
- Bone and Mineral Metabolism Laboratory, Jiménez Díaz Foundation (Capio Group), Madrid, Spain
| | - Sonia Dapía
- Trabeculae®, San Cibrao das Viñas, Ourense, Spain
| | - Sergio Portal-Núñez
- Bone and Mineral Metabolism Laboratory, Jiménez Díaz Foundation (Capio Group), Madrid, Spain
| | | | - Enrique Gómez-Barrena
- Orthopedic Department, Jiménez Díaz Foundation and Autonomous University of Madrid, Madrid, Spain
| | - Pedro Esbrit
- Bone and Mineral Metabolism Laboratory, Jiménez Díaz Foundation (Capio Group), Madrid, Spain
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Zauli G, Rimondi E, Celeghini C, Milani D, Secchiero P. Dexamethasone counteracts the anti-osteoclastic, but not the anti-leukemic, activity of TNF-related apoptosis inducing ligand (TRAIL). J Cell Physiol 2010; 222:357-64. [DOI: 10.1002/jcp.21960] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lowin T, Straub RH, Neumann E, Bosserhoff A, Vogel C, Moissl C, Anders S, Müller-Ladner U, Schedel JÃ. Glucocorticoids increase α5 integrin expression and adhesion of synovial fibroblasts but inhibit ERK signaling, migration, and cartilage invasion. ACTA ACUST UNITED AC 2009; 60:3623-32. [DOI: 10.1002/art.24985] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Takahashi M, Ushijima K, Hayashi Y, Maekawa T, Ando H, Tsuruoka SI, Fujimura A. Dosing-time dependent effect of dexamethasone on bone density in rats. Life Sci 2009; 86:24-9. [PMID: 19903488 DOI: 10.1016/j.lfs.2009.10.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2009] [Revised: 10/23/2009] [Accepted: 10/29/2009] [Indexed: 10/20/2022]
Abstract
AIMS While glucocorticoids are widely used to treat patients with various diseases, they often cause adverse effects such as bone fractures. In this study, we investigated whether the decrease in bone density induced by glucocorticoid therapy was ameliorated by optimizing a dosing-time. MAIN METHODS Rats were administered with dexamethasone (Dex) orally (1mg/kg/day) for 6weeks at a resting or an active period. After the end of the treatment, bone density of femur, biomarkers of bone formation and resorption, and other biomedical variables were measured. KEY FINDINGS Bone density of femur was significantly decreased by the 6-week treatment with Dex, and the degree of decrease in the 14 HALO (hours after light on) dosing group (an active period) was larger than that in the 2 HALO dosing group (a resting period). Although urinary calcium excretion was accelerated by Dex treatment, secondary hyperparathyroidism was not detected. Histomorphometry analysis showed that Dex suppressed bone resorption, which was larger in the 2 HALO than in the 14 HALO groups. These data indicate that Dex equally suppressed bone formation in the 2 and 14 HALO groups, but inhibited bone resorption more in the 2 HALO than in the 14 HALO groups. SIGNIFICANCE This study shows that the decrease in bone density induced by Dex was changed by its dosing-time.
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Affiliation(s)
- Masaki Takahashi
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi 329-0498, Japan
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