Figure 6From: The sonic hedgehog signaling pathway is reactivated in human renal cell carcinoma and plays orchestral role in tumor growthInhibition of the SHH signaling pathway induces tumor regression in nude mice. (A) Tumor growth in mice treated according to the first experimental protocol. Results are shown as mean ± SEM, n = 7 for both groups; **, P < 0.01 cyclopamine-treated mice vs Ctl-treated mice. Immunoblotting experiments to measure expression of Gli1 in tumors lysates. The gels shown are representative for at least 3 independent experiments. Photographs show the implanted tumors in representative mice at day 1 of drug injection, at day 19 in Ctl-treated group or cyclopamine-treated group. (B) Tumor growth in mice treated according to the second protocol. Results are shown as mean ± SEM, n = 7 for both groups; **, P < 0.01 cyclopamine-treated mice vs Ctl-treated mice. (C) Left, tumor sections of control- (Ctl) or cyclopamine (Cyclopamine)-treated mice immunostained with an antibody against Ki67 (magnification ×400). Right, proliferative index. Results are shown as mean ± SEM, n = 7. **, P < 0.01 from Ctl-treated mice. (D) Left, tumor sections of control- (Ctl) or cyclopamine (Cyclopamine)-treated mice immunostained for CD31 (magnification ×400). Right, quantification of neovascularization. Results are shown as mean ± SEM, n = 7. *, P < 0.05 from Ctl-treated mice.Back to article page