title: Cells derived from murine induced pluripotent stem cells (iPSC) by treatment with members of TGF-beta family give rise to osteoblasts differentiation and form bone in vivo.
abstract: BACKGROUND
  Induced pluripotent stem cells (iPSC) are generated by reprogramming somatic cells into embryonic like state (ESC) using defined factors. There is great interest in these cells because of their potential for application in regenerative medicine.
  
  
  RESULTS
  iPSC reprogrammed from murine tail tip fibroblasts were exposed to retinoic acid alone (RA) or in combination with TGF-β1 and 3, basic fibroblast growth factor (bFGF) or bone morphogenetic protein 2 (BMP-2). The resulting cells expressed selected putative mesenchymal stem cells (MSCs) markers; differentiated toward osteoblasts and adipocytic cell lineages in vitro at varying degrees. TGF-beta1 and 3 derived-cells possessed higher potential to give rise to osteoblasts than bFGF or BMP-2 derived-cells while BMP-2 derived cells exhibited a higher potential to differentiate toward adipocytic lineage. TGF-β1 in combination with RA derived-cells seeded onto HA/TCP ceramics and implanted in mice deposited typical bone. Immunofluorescence staining for bone specific proteins in cell seeded scaffolds tissue sections confirmed differentiation of the cells into osteoblasts in vivo.
  
  
  CONCLUSIONS
  The results demonstrate that TGF-beta family of proteins could potentially be used to generate murine iPSC derived-cells with potential for osteoblasts differentiation and bone formation in vivo and thus for application in musculoskeletal tissue repair and regeneration.
authors.affiliation: Department of Orthopaedics and Rehabilitation, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Christopher
authors.initials: C
authors.lastname: Niyibizi
mesh_terms: D000818:Animals; D055396:Bone Morphogenetic Protein 2 / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects*; D016222:Fibroblast Growth Factor 2 / Q000494:pharmacology; D057026:Induced Pluripotent Stem Cells / Q000166:cytology* / Q000637:transplantation; D051379:Mice; D010006:Osteoblasts / Q000166:cytology; D010012:Osteogenesis / Q000187:drug effects*; D053773:Transforming Growth Factor beta1 / Q000494:pharmacology*; D053782:Transforming Growth Factor beta3 / Q000494:pharmacology*; D014212:Tretinoin / Q000494:pharmacology
chemical_list: D055396:Bone Morphogenetic Protein 2; D053773:Transforming Growth Factor beta1; D053782:Transforming Growth Factor beta3; D016222:Fibroblast Growth Factor 2; D014212:Tretinoin