Figure 1. miR-155 Expression Enhances Tumorigenesis in vivo ovariectomized SCID/CB-17 female mice injected bilaterally with 5×10⁶ MCF-7-vector cells or MCF-7-miR-155 cells, n=5 animals/group.

(A) Tumor volume, points represent average tumor volume ± SEM starting at day 7 post injection, measurements were carried out until necroscopy (day 28). (B) final tumor weight at necroscopy (day 28). * significantly different p < 0.05, ** significantly different p < 0.01