Fig. 6

β2-AR and VEGFR2 are co-expressed in both vascular endothelial cells and gastric tumor cells. a-d Representative images of immunohistochemcal fluorescent staining show the double staining of β2-AR (in red color) and VEGFR2 (in green color) in the normal gastric tissues (a and c, no positive double staining), in the vascular endothelial cells within the gastric tumor (b and its 3 magnified panels: left, co-localization as indicated by an arrow; middle, green color only; and right, red color only), and in the gastric cancer cells (d and its 3 magnified panels: left, co-localization as indicated by an arrow; middle, green color only; and right, red color only). Scale bar, 25 μm