[HTML][HTML] HLA expression and immunologic propertiesof differentiated and undifferentiated mesenchymal stem cells

K Le Blanc, C Tammik, K Rosendahl, E Zetterberg… - Experimental …, 2003 - Elsevier
OBJECTIVE: Mesenchymal stem cells (MSC) do not elicit alloreactive lymphocyte responses
due to immune modulations. We investigated the immunologic properties of MSC after
differentiation along three lineages: bone, cartilage, and adipose. METHODS AND
RESULTS: Flow cytometry showed that undifferentiated MSC express HLA class I but not
class II, although HLA class II was present intracellularly as detected by Western blot.
Addition of interferon γ (IFN-γ) for 48 hours induced greater than 90% of cells to express …