A). Effect of AR-siRNA on SW480 xenografts. An aliquot of 2 × 106 SW480 cells in 100 μL PBS was injected s.c. into one flank of each nu/nu nude mouse. When tumors reached a cross-sectional area of 45 mm2, animals were treated with PBS, scrambled siRNA, or AR-siRNA. At different days, tumors were measured in two dimensions using calipers. B). Photographs of animals taken at different days of tumor progression are shown. [Reproduced with permission from R Tammali et al.: Cancer Res. 66 (19): 9705 – 9713, 2006; Ref.: 25)