Journal: Molecular Oncology
Article Title: Hypoxia‐driven paracrine osteopontin/integrin αvβ3 signaling promotes pancreatic cancer cell epithelial–mesenchymal transition and cancer stem cell‐like properties by modulating forkhead box protein M1
doi: 10.1002/1878-0261.12399
Figure Lengend Snippet: Hypoxia‐driven paracrine OPN signaling promotes EMT and CSC ‐like properties in PCC s. (A) The mRNA expression levels of OPN , the αv subunit of integrin, and the β3 subunit of integrin in 4 pancreatic cancer cell lines and PSC s were analyzed by quantitative real‐time RT ‐ PCR . (B and C) The protein expression levels of OPN , the αv subunit of integrin, and the β3 subunit of integrin in 4 pancreatic cancer cell lines and PSC s were determined by western blot analysis. β‐Actin was used as an internal control. (D) The cell supernatants of 4 pancreatic cancer cell lines and PSC s were collected, and the OPN concentration was measured by ELISA . (E) Representative images from the wound healing assay after rh OPN , PSC ‐ CM , or PSC ‐ CM + OPN Ab treatments in Bx PC ‐3 and CFPAC ‐1 cells. Images were obtained at 0 h and 24 h. The scale bar represents 100 μm. (F and G) Representative images of the Matrigel invasion assay after rh OPN , PSC ‐ CM , or PSC ‐ CM + OPN Ab treatments in Bx PC ‐3 and CFPAC ‐1 cells. The invasive cells were quantified by counting the number of cells in 10 random fields. The scale bar represents 50 μm. (H, I and J) Representative images of the tumorsphere formation assay after rh OPN , PSC ‐ CM , or PSC ‐ CM + OPN Ab treatments in Bx PC ‐3 and CFPAC ‐1 cells. The number of tumorspheres was counted and plotted, and the percentage of tumorspheres with diameters of 50–100 μm, 100–150 μm, or >150 μm was calculated and plotted. The scale bar represents 50 μm. (K) The protein expression levels of EMT and CSC markers after rh OPN , PSC ‐ CM , or PSC ‐ CM + OPN Ab treatments were determined by western blot analysis in Bx PC ‐3 and CFPAC ‐1 cells. β‐Actin was used as an internal control. Q‐ PSC : Quiescent pancreatic stellate cell. A‐ PSC : Activated pancreatic stellate cell. All data are shown as the mean ± SD of at least three independent experiments. One‐way ANOVA and Tukey's multiple comparisons test were performed to determine significance. * P < 0.05, ** P < 0.01, ns: no significance.
Article Snippet: Integrin αvβ3 blocking antibody was obtained from Millipore (Darmstadt, Germany).
Techniques: Expressing, Quantitative RT-PCR, Western Blot, Control, Concentration Assay, Enzyme-linked Immunosorbent Assay, Wound Healing Assay, Invasion Assay, Tube Formation Assay