Fig. 2

Tumor oxygenation enhancement. (a) Immunofluorescence images of tumor slices stained by the hypoxyprobe. The blood vessels and hypoxia areas were stained with anti-CD31 antibody (red) and antipimonidazole antibody (green), respectively.Scale bars = 400 μm. (b) Quantification of tumor hypoxia densities for different treatment groups (n = 3). *** indicate P < 0.001