Mesenchymal stem cell marker Stro-1 is a 75kd endothelial antigen

► Stro-1 is identified in the vasculature of liver, lung and kidney. ► Stro-1 is co-localized with endothelial marker vWF. ► Western blot analysis identifies Stro-1 as a 75kd protein in endothelial cells. ► Stro-1 is expressed in cultured adipose-derived stem cells (ADSC). ► Stro-1 expression is higher in endothelially induced ADSC.