Morphine Promotes Tumor Angiogenesis and Increases Breast Cancer Progression

Figure 3

Morphine promotes angiogenesis formation in heterotopic mouse model of breast cancer. Immunohistochemical analysis for PECAM-1showed the enhancement of PECAM-1 expression in morphine treated group (b), compared to controls (a). Arrows indicate positive staining of microvessel staining.

(a)

(b)