title: Comparison of osteogenic ability of rat mesenchymal stem cells from bone marrow, periosteum, and adipose tissue.
abstract: Mesenchymal stem cells (MSCs) reside in many types of tissue and are able to differentiate into various functional cells including osteoblasts. Recently, adipose tissue-derived MSCs (AMSCs) have been shown to differentiate into many lineages, and they are considered a source for tissue regeneration. The purpose of this study was to compare the osteogenic differentiation capability of MSCs from bone marrow (BMSCs), MSCs from periosteum (PMSCs), and AMSCs using in vitro culture and in vivo implantation experiments. We harvested these MSCs from 7-week-old rats. The cells were seeded and cultured for 7 days in primary culture to assay a colony-forming unit. The frequency of the unit was the smallest in the BMSCs (P < 0.001). After primary culture, subculture was performed under osteogenic differentiation conditions for 1 and 2 weeks to detect mineralization as well as the bone-specific proteins of alkaline phosphatase and osteocalcin as osteogenic markers. BMSCs and PMSCs showed distinct osteogenic differentiation capability in comparison with other MSCs (P < 0.001). For the in vivo assay, composites of these cells and hydroxyapatite ceramics were subcutaneously implanted into syngeneic rats and harvested after 6 weeks. Micro-computed tomographic (CT) and histological analyses demonstrated that new bone formation was detected in the composites using BMSCs and PMSCs, although it was hard to detect in other composites. The CT analyses also demonstrated that the bone volume of BMSC composites was more than that of AMSC composites (P < 0.001). These results indicate that BMSCs and PMSCs could be ideal candidates for utilization in practical bone tissue regeneration.
authors.affiliation: Department of Orthopedic Surgery, Nippon Medical School, Tokyo, Japan. ousuke0823.hayashi@aist.go.jp
authors.forename: Ousuke
authors.initials: O
authors.lastname: Hayashi
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Katsube
authors.forename: Motohiro
authors.initials: M
authors.lastname: Hirose
authors.forename: Hajime
authors.initials: H
authors.lastname: Ohgushi
authors.forename: Hiromoto
authors.initials: H
authors.lastname: Ito
mesh_terms: D000273:Adipose Tissue / Q000166:cytology* / Q000637:transplantation; D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology*; D016026:Bone Marrow Transplantation; D002113:Calcification, Physiologic; D002454:Cell Differentiation / Q000502:physiology*; D003114:Colony-Forming Units Assay; D004247:DNA / Q000032:analysis; D017886:Durapatite; D005109:Extracellular Matrix / Q000378:metabolism; D005452:Fluoresceins / Q000378:metabolism; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism; D015675:Osteocalcin / Q000378:metabolism; D010012:Osteogenesis / Q000502:physiology*; D010521:Periosteum / Q000166:cytology* / Q000637:transplantation; D051381:Rats; D011916:Rats, Inbred F344; D033581:Stem Cell Transplantation; D014057:Tomography, X-Ray Computed
chemical_list: D015415:Biomarkers; D005452:Fluoresceins; D015675:Osteocalcin; D004247:DNA; D017886:Durapatite; D000469:Alkaline Phosphatase; C007740:fluorexon