FIG. 1.

The morphology of hMSC spheroids was observed through light microscopy (A), GFP expression (B), nucleus staining (C), and F-actin staining (D). The average Feret diameter and DNA content of hMSC spheroids cultured under low and normal oxygen conditions are shown in the (E, F), respectively. No significant differences were found in both the Feret diameter and the DNA content between the two conditions. GFP, green fluorescent protein; hMSC, human mesenchymal stem cell. Color images available online at www.liebertpub.com/tec