Fig. 3From: Vascularization mediated by mesenchymal stem cells from bone marrow and adipose tissue: a comparisonHUVECs (green) form pre-vascular structures in co-culture with ASCs (red) in fibrin after 4Â weeks. HUVECs were transfected with green fluorescence protein to make vascular structures visible under a fluorescence microscope. A staining against NG2 was performed, showing that only ASCs express this surface marker protein. Additionally, it shows that ASCs surrounded the cord-like structures formed by HUVECs(shown by arrows) [33]Back to article page