title: Bone Formation by Sheep Stem Cells in an Ectopic Mouse Model: Comparison of Adipose and Bone Marrow Derived Cells and Identification of Donor-Derived Bone by Antibody Staining.
abstract: Background. Scaffolds for bone tissue engineering (BTE) can be loaded with stem and progenitor cells (SPC) from different sources to improve osteogenesis. SPC can be found in bone marrow, adipose tissue, and other tissues. Little is known about osteogenic potential of adipose-derived culture expanded, adherent cells (A-CEAC). This study comparesin vivoosteogenic capacity between A-CEAC and bone marrow derived culture expanded, adherent cells (BM-CEAC).Method. A-CEAC and BM-CEAC were isolated from five female sheep and seeded on hydroxyapatite granules prior to subcutaneous implantation in immunodeficient mice. The doses of cells in the implants were 0.5 × 106, 1.0 × 106, or 1.5 × 106A-CEAC and 0.5 × 106BM-CEAC, respectively. After eight weeks, bone volume versus total tissue volume (BV/TV) was quantified using histomorphometry. Origin of new bone was assessed using human vimentin (HVIM) antibody staining.Results. BM-CEAC yielded significantly higher BV/TV than any A-CEAC group, and differences between A-CEAC groups were not statistically significant. HVIM antibody stain was successfully used to identify sheep cells in this model.Conclusion. A-CEAC and BM-CEAC were capable of forming bone, and BM-CEAC yielded significantly higher BV/TV than any A-CEAC group.In vitrotreatment to enhance osteogenic capacity of A-CEAC is suggested for further research in ovine bone tissue engineering.
authors.affiliation: Orthopaedic Research Laboratory, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29, 5000 Odense C, Denmark.
authors.forename: Kristian
authors.identifier: 0000-0002-0859-3627
authors.initials: K
authors.lastname: Kjærgaard
authors.affiliation: Orthopaedic Research Laboratory, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29, 5000 Odense C, Denmark.
authors.forename: Chris H
authors.initials: CH
authors.lastname: Dreyer
authors.affiliation: Department of Endocrinology and Metabolism, Molecular Endocrinology Laboratory (KMEB), Odense University Hospital, University of Southern Denmark, J. B. Winsløws Vej 25.1, 5000 Odense C, Denmark.
authors.forename: Nicholas
authors.initials: N
authors.lastname: Ditzel
authors.affiliation: Orthopaedic Research Laboratory, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29, 5000 Odense C, Denmark.
authors.forename: Christina M
authors.initials: CM
authors.lastname: Andreasen
authors.affiliation: Department of Endocrinology and Metabolism, Molecular Endocrinology Laboratory (KMEB), Odense University Hospital, University of Southern Denmark, J. B. Winsløws Vej 25.1, 5000 Odense C, Denmark.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, J. B. Winsløws Vej 21.3, 5000 Odense C, Denmark.
authors.forename: Søren P
authors.initials: SP
authors.lastname: Sheikh
authors.affiliation: Orthopaedic Research Laboratory, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29, 5000 Odense C, Denmark.
authors.forename: Søren
authors.initials: S
authors.lastname: Overgaard
authors.affiliation: Orthopaedic Research Laboratory, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29, 5000 Odense C, Denmark.
authors.forename: Ming
authors.identifier: 0000-0002-6610-8079
authors.initials: M
authors.lastname: Ding