Figure 4. Xenograft tumor formation of DU145 cells in PlncRNA-1-silenced nude mice. (A) Photograph of nude mice with Xenografted tumors on day 28. (B) Pictorials of subcutaneous tumors on day 28. (C) Growth curves for xenografted tumors. (D) The tumor weights in different groups. (E) Immunohistochemistry assay for the expression of Ki-67 in the tumor xenografts (Scale bar, 100 μm). (F) Quantitative analysis immunohistochemistry assay for the expression of Ki-67 in the tumor xenografts.