Journal: International Journal of Molecular Sciences
Article Title: Effects of IGF-1 on Proliferation, Angiogenesis, Tumor Stem Cell Populations and Activation of AKT and Hedgehog Pathways in Oral Squamous Cell Carcinoma
doi: 10.3390/ijms21186487
Figure Lengend Snippet: Regulation of AKT and HH pathways in SCC-4 by stimulation with IGF-1 or fibroblast-conditioned media. SCC-4 cells were stimulated for 24 h with 10% FBS, 100 ng/mL rIGF-1 or 50% conditioned medium from control fibroblasts (MF1) or cells overexpressing IGF-1 (MF1-IGF-1). Western blot analysis was performed to detect ( A ) total AKT and phospho-Akt (S473), with band intensity measured and plotted using ImageJ; ( B ) GLI1, IHH, PTCH1 and SMO band intensities were measured and plotted using ImageJ; ( C ) GLI1 mRNA expression was evaluated by RT-qPCR 6 h after stimulating cells with rIGF-1 or conditioned media. Data are presented as means ± SDs, bars represent comparisons between respective groups and (*) denotes statistical significance after applying the one-way ANOVA and Dunnett’s post-test, p < 0.05. CM: conditioned medium. ( D ) IHH immunostaining in MF1 and MF1-IGF-1 fibroblasts. The presence of the IHH ligand is shown in red, while nuclei were stained with DAPI (blue). Bars = 50 μm.
Article Snippet: The following primary antibodies were used: GLI1 (1:500; Novus #NB800, Centennial, CO, USA), PTCH1 (1:500; Novus #NB200-118 Centennial, CO, USA), SHH (1:500; Novus #NBP2-22126, Centennial, CO, USA), IHH (1:500; Abcam #EP1192, Branford, CT, USA), pan-cytokeratin (1:500; MyBiosource IML-91, San Diego, CA, USA), Nanog (1:200; Santa Cruz SC1732, Dallas, TX, USA) and SOX2 (1:200; Millipore AB5731, Darmstadt, Alemanha).
Techniques: Control, Western Blot, Expressing, Quantitative RT-PCR, Immunostaining, Staining