Fig. 2

ciRS-7 enhances RCC tumor growth and metastasis in vivo and PBAE/si-ciRS-7 nanocomplexes inhibits RCC growth and metastasis in vivo. A. The sizes with different weight ratios of PBAE to siPlk1. The weight ratios of PBAE to si-ciRS-7 were ranged from 1 to 120. B. The loading efficiency of PBAE. C. TEM images of PBAE/si-ciRS-7 nanocomplexes (PBAE/si-ciRS-7 = 80/1). D. size distribution of PBAE/si-ciRS-7 nanocomplexes (PBAE/si-ciRS-7 = 80/1). E. Graphic illustration of the in vivo mice model study. F-H. 786-O cells stably transfected with OE-ciRS-7, control, or sh-ciRS-7 were injected subcutaneously into the mice. Tumor volume (G) and weight (H) increased in the OE-ciRS-7 group, while both tumor volume and weight decreased in the sh-ciRS-7 group. I. IHC assay demonstrated the level of TAGLN and Ki67 in pairs of tumours. J. After tail vein injection of treated cells, imaging, gross lung tissue lesions and HE staining were observed. K. The flow diagram showed the scheme of intratumorally/intravenously with saline, si-ciRS-7 or PBAE/si-ciRS-7 into mice. L-N. Weight volume and weight change after 3 weeks of treatment with saline, si-ciRS-7 or PBAE/si-ciRS-7 for xenograft tumors or lung metastasis models. O. IHC assay demonstrated the level of TAGLN and Ki67 in pairs of tumours. P. IVIS imaging of mice treated with saline, si-ciRS-7 or PBAE/si-ciRS-7 for subcapsular orthotopic implantation of the right kidney. Q. After tail vein injection of treated cells, imaging, gross lung tissue lesions and HE staining were observed. R. The hypothetical model depicts the roles of ciRS-7 in the promotion of RCC. (*p < 0.05, **p < 0.01, ***p < 0.001)