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  • 1
    In: Annals of the New York Academy of Sciences, June 2007, Vol.1106(1), pp.262-271
    Description: :  The isolation of mesenchymal stem cells (MSC) from primary tissue is hampered by the limited selectivity of available markers. So far, CD271 is one of the most specific markers for bone marrow (BM)‐derived MSC. In search of additional markers, monoclonal antibodies (mAbs) with specificity for immature cells were screened by flow cytometry for their specific reactivity with the rare CD271+ population. The recognized CD271+ populations were fractionated by fluorescence‐activated cell sorting and the clonogenic capacity of the sorted cells was analyzed for their ability to give rise to CFU‐F. The results showed that only the CD271bright but not the CD271dim population contained CFU‐F. Two‐color flow cytometry analysis revealed that only the CD271bright population was positive for the established MSC markers CD10, CD13, CD73, and CD105. In addition, a variety of mAbs specific for novel and partially unknown antigens selectively recognized the CD271bright population but no other BM cells. The new MSC‐specific molecules included the platelet‐derived growth factor receptor‐β (CD140b), HER‐2/erbB2 (CD340), frizzled‐9 (CD349), the recently described W8B2 antigen, as well as cell‐surface antigens defined by the antibodies W1C3, W3D5, W4A5, W5C4, W5C5, W7C6, 9A3, 58B1, F9‐3C2F1, and HEK‐3D6. In conclusion, the described markers are suitable for the prospective isolation of highly purified BM‐MSC. These MSC may be used as an improved starting population for transplantation in diseases like osteogenesis imperfecta, cartilage repair, and myocardial infarction.
    Keywords: Mesenchymal Stem Cells ; Bone Marrow ; Msc ; Prospective Isolation
    ISBN: 1573316768
    ISSN: 0077-8923
    E-ISSN: 1749-6632
    E-ISSN: 19306547
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