title: MSCA-1/TNAP selection of human jaw periosteal cells improves their mineralization capacity.
abstract: Human jaw periosteum-derived cells (JPCs) represent an alternative cell source to bone marrow-derived mesenchymal stem cells for tissue engineering applications in the oral and maxillofacial surgery. In this study we investigated how far the presence or expression of human mesenchymal stem cell antigen-1/tissue non-specific alkaline phosphatase (MSCA-1/TNAP) and LNGFR (CD271) can be utilized to select and enrich the osteogenic progenitor cell fraction from the entire JPC population. Depending on their mineralization capacity, we classified the human isolated JPCs into mineralizing (mJPCs) and non-mineralizing JPCs (nmJPCs). Flow cytometric analyses revealed that undifferentiated mJPCs expressed MSCA-1/TNAP at significant higher levels than nmJPCs at day 5 and 10 of osteogenesis. Western blot analyses showed increased MSCA-1/TNAP expression levels in mJPCs during osteogenesis, whereas in nmJPCs MSCA-1/TNAP expression remained undetectable. Using the MSCA-1 and LNGFR specific antibodies, we separated the positive and negative fractions from the entire mJPC population. In order to analyse the mineralization capacity of the MSCA-1(+) and LNGFR(+) cell subsets, we quantified the calcium deposition in both subpopulations in comparison to the respective negative subpopulations. The MSCA-1(+)/TNAP(+) cell fraction showed a significant higher osteogenic capacity compared to the MSCA-1-/TNAP- cell fraction whereas the LNGFR(+/-) cell fractions did not differ in their osteogenic potential. Our findings suggest that MSCA-1 may represent a promising osteogenic marker for mJPC.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University Hospital Tübingen, Tübingen, Germany. dorothea.alexander@med.uni-tuebingen.de
authors.forename: Dorothea
authors.initials: D
authors.lastname: Alexander
authors.forename: Fabian
authors.initials: F
authors.lastname: Schäfer
authors.forename: Marcus
authors.initials: M
authors.lastname: Olbrich
authors.forename: Björn
authors.initials: B
authors.lastname: Friedrich
authors.forename: Hans-Jörg
authors.initials: HJ
authors.lastname: Bühring
authors.forename: Jürgen
authors.initials: J
authors.lastname: Hoffmann
authors.forename: Siegmar
authors.initials: S
authors.lastname: Reinert
mesh_terms: D000068816:Adapalene; D000469:Alkaline Phosphatase; D000954:Antigens, Surface / Q000378:metabolism*; D015415:Biomarkers / Q000378:metabolism; D002113:Calcification, Physiologic / Q000502:physiology; D002118:Calcium / Q000378:metabolism; D002352:Carrier Proteins / Q000378:metabolism*; D002454:Cell Differentiation; D002478:Cells, Cultured; D006801:Humans; D007568:Jaw / Q000166:cytology / Q000378:metabolism*; D009281:Naphthalenes / Q000378:metabolism; D009419:Nerve Tissue Proteins / Q000378:metabolism; D010012:Osteogenesis / Q000502:physiology; D010521:Periosteum / Q000166:cytology / Q000378:metabolism*; D017475:Receptors, Nerve Growth Factor / Q000378:metabolism; D023822:Tissue Engineering
chemical_list: D000954:Antigens, Surface; D015415:Biomarkers; D002352:Carrier Proteins; C484065:NGFR protein, human; D009281:Naphthalenes; D009419:Nerve Tissue Proteins; D017475:Receptors, Nerve Growth Factor; C540400:W8B2 protein, human; D000068816:Adapalene; C548267:ALPL protein, human; D000469:Alkaline Phosphatase; D002118:Calcium