Journal: Autophagy
Article Title: Autophagy-induced KDR/VEGFR-2 activation promotes the formation of vasculogenic mimicry by glioma stem cells
doi: 10.1080/15548627.2017.1336277
Figure Lengend Snippet: Autophagy promotes tubule-like structure formation by GSCs in 3D scaffold. (A) GSCs transfected with EGFP-LC3 were cultured in DMEM, STM or EBM for 72 h. Confocal microscopy was used to assess autophagy shown as green spots (left panel). Two hundred cells were randomly chosen to count the number of EGFP-LC3 fluorescent spots (right panel). Scale bar: 10 μm. (B) Confocal microscopy showing EGFP-transfected GSCs to form tubule-like structure in 3D scaffold (left panel). The number of tubular structures formed by GSCs in 3D scaffold was analyzed (right pannel). Scale bar: 20 μm. Asterisks (*) indicate VM channel formed by tumor cells. (C) Expression of autophagy proteins, ATG5, ATG7, LC3-I to LC3-II conversion and SQSTM1. TUBB/β-Tubulin served as a control. (D) The expressions of PROM1, GFAP, KDR proteins and the phosphorylation of Y1175 in the C-terminal region of KDR (p-KDR) as well as CDH5 and LAMB2. (E) Double staining of LC3 and CDH5 as well as LC3 and LAMB2 in GSCs cultured with EBM on the scaffold. LC3 is marked as red spots in the cytoplasm; CDH5 and LAMB2 are in green color in the cytoplasm. Scale bar: 20 μm. Nuclei were stained by Hoechst 33324 in blue. The results are expressed as the mean ± SEM from 3 experiments.
Article Snippet: Antibodies Antibodies used include mouse anti-LAMB2/laminin B2 monoclonal antibody (mAb; BD Biosciences, 610722), rabbit anti-CDH5/cadherin 5 mAb (Cell Signaling Technology, 2158), rabbit anti-PROM1/CD133 polyclonal antibody (pAb; Santa Cruz Biotechnology, sc-30220), rabbit anti-GFAP pAb (Abcam, ab7260), mouse anti-CD34 mAb (Abcam, ab187282), rabbit anti-VEGF pAb (Proteintech, 19003–1-AP), rabbit anti-phospho- KDR/VEGFR-2 mAb (Cell Signaling Technology, 2478), rabbit anti-KDR/VEGFR-2 mAb (Cell Signaling Technology, 2479), mouse anti-LC3B mAb (Santa Cruz Biotechnology, sc-376404), rabbit anti-ATG5 mAb (Cell Signaling Technology, 8540), rabbit anti-ATG7 mAb (Cell Signaling Technology, 8558), rabbit anti-SQSTM1/p62 pAb (Sigma-Aldrich, P0067), rabbit anti-BECN1 mAb (Abcam, ab51031), mouse anti-PI3K p85 mAb (Abcam, ab86714), rabbit anti-pan-AKT pAb (Abcam, ab8805), rabbit anti-phospho-PI3K p85 (Y607) pAb (Abcam, ab182651), rabbit anti-phospho-pan-AKT pAb (Abcam, ab38449).
Techniques: Transfection, Cell Culture, Confocal Microscopy, Expressing, Double Staining, Staining