Osteogenic potential of human bone marrow stromal cell line HS-27A.

Human cell line HS-27A represents an immortalized subpopulation of human stromal cells derived from bone marrow. HS-27A cells meet the criteria set by the International Society of Cell Therapy (ISCT) for the classification as mesenchymal stem cells (MSCs) by expression of surface molecules CD73, CD90, CD105 and HLA-ABC with no expression of CD14, CD31, CD34, CD45 and HLA-DR. We hypothesized that these cells may undergo osteogenesis similar to human bone marrow-derived stromal cells (BMSCs) and serve as a model of osteogenic cell responses under normal and inflammatory conditions.