Journal: Nature Communications
Article Title: Purine metabolism regulates DNA repair and therapy resistance in glioblastoma
doi: 10.1038/s41467-020-17512-x
Figure Lengend Snippet: a Clonogenic survival assays were performed on the indicated GBM cell lines to determine Dmid (the linear area under the clonogenic survival curve). Data are presented as mean ± SEM from 3 to 7 biologic replicates. b RT-resistant (U87 MG and A172) and RT-sensitive (KS-1 and U118 MG) GBM cell lines were irradiated with 8 Gy, followed by γ-H2AX flow cytometry analysis at 0, 0.5, 2, or 24 h following RT. Data are presented as mean ± SEM from 3 biologic replicates. c Metabolites were grouped into pathways and an average pathway-level correlation with RT-sensitivity was determined. Only the pathways significantly correlated with RT-sensitivity are shown. d Two RT-resistant (U87 MG and A172) and two RT-sensitive (KS-1 and U118 MG) GBM cell lines were irradiated with 8 Gy, and harvested 2 h after RT and analyzed by targeted LC-MS/MS (4 biologic replicates per cell line). Fold-change values for each metabolite were determined based on unirradiated matched cell line controls and then averaged for the two resistant (left) or sensitive (right) cell lines. e Pathways with downregulated metabolites post-RT that are significantly correlated with RT-sensitivity are shown (Pearson’s correlation; p = 0.0001 for guanylates; p = 0.02 for glutathione; p = 0.03 for nucleotide sugar, p = 0.0495 for adenylates.). Source data are provided as a Source Data file.
Article Snippet: This was then correlated with RT-resistance score using Pearson’s linear correlation function in MATLAB.
Techniques: Irradiation, Flow Cytometry, Liquid Chromatography with Mass Spectroscopy