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Herberg S, Kondrikova G, Hussein KA, Johnson MH, Elsalanty ME, Shi X, Hamrick MW, Isales CM, Hill WD. Mesenchymal stem cell expression of stromal cell-derived factor-1β augments bone formation in a model of local regenerative therapy. J Orthop Res 2015; 33:174-84. [PMID: 25351363 PMCID: PMC4706461 DOI: 10.1002/jor.22749] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Bone has the potential for spontaneous healing. However, this process often fails in patients with co-morbidities requiring clinical intervention. Numerous studies have revealed that bone marrow-derived mesenchymal stem/stromal cells (BMSCs) hold great potential for regenerative therapies. Common problems include poor cell engraftment, which can be addressed by irradiation prior to transplantation. Increasing evidence suggests that stromal cell-derived factor-1 (SDF-1) is involved in bone formation. However, osteogenic contributions of the beta splice variant of SDF-1 (SDF-1β), which is highly expressed in bone, remain unclear. Using the tetracycline (Tet)-regulatory system we have shown that SDF-1β enhances BMSC osteogenic differentiation in vitro. Here we test the hypothesis that SDF-1β augments bone formation in vivo in a model of local BMSC transplantation following irradiation. We found that SDF-1β, expressed at high levels in Tet-Off-SDF-1β BMSCs, augments the cell-mediated therapeutic effects resulting in enhanced bone formation, as evidenced by ex vivo μCT and bone histomorphometry. The data demonstrate the specific contribution of SDF-1β to BMSC-mediated bone formation, and validate the feasibility of the Tet-Off technology to regulate SDF-1β expression in vivo. In conclusion, SDF-1β provides potent synergistic effects supporting BMSC-mediated bone formation and appears a suitable candidate for optimization of bone augmentation in translational protocols.
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Affiliation(s)
- Samuel Herberg
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Galina Kondrikova
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., CB-1119, Augusta, Georgia 30912,Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Khaled A. Hussein
- Department of Oral Biology, Georgia Regents University, Augusta, Georgia
| | - Maribeth H. Johnson
- Department of Biostatistics and Epidemiology, Georgia Regents University, Augusta, Georgia,Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia
| | - Mohammed E. Elsalanty
- Department of Oral Biology, Georgia Regents University, Augusta, Georgia,Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia
| | - Xingming Shi
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia,Department of Orthopaedic Surgery, Georgia Regents University, Augusta, Georgia,Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, Georgia
| | - Mark W. Hamrick
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., CB-1119, Augusta, Georgia 30912,Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia,Department of Orthopaedic Surgery, Georgia Regents University, Augusta, Georgia
| | - Carlos M. Isales
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia,Department of Orthopaedic Surgery, Georgia Regents University, Augusta, Georgia,Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, Georgia
| | - William D. Hill
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., CB-1119, Augusta, Georgia 30912,Charlie Norwood VA Medical Center, Augusta, Georgia,Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia,Department of Orthopaedic Surgery, Georgia Regents University, Augusta, Georgia
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Chen U. Some properties and applications of cell lines and clones established from tet-responsive-SV40 tag mice and mES cell lines. Scand J Immunol 2011; 73:531-5. [PMID: 21375558 DOI: 10.1111/j.1365-3083.2011.02551.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In this article, 11 cell lines established from transgenic mice and mouse embryonic stem cells (mESC) expressing SV40Tag under control of tetracycline/doxycycline (tet-off, tet-on) are described. Several cell lines were further transfected with a plasmid vector containing genes coding for a cytokine/protein under tet-regulation to obtain tet-co-regulated expression of cytokine/protein. A total of 29 clones and 234 subclones have been established so far. Partial characterization of these tet-responsive cell lines, clones and subclones was performed. Questions related to the rare frequency of establishing permanent cycling cell lines from this source, the unusual expression pattern of SV40Tag protein in the subcellular compartment and the phenotype of 'stemness' of several such cell lines are raised. Some future applications of these cells, related to immunology and transplantation, are discussed.
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Affiliation(s)
- U Chen
- International Senior Professional Institute, Grünbergerstrasse, Giessen, Germany.
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