Journal: Cell Reports Medicine
Article Title: Myeloid cells coordinately induce glioma cell-intrinsic and cell-extrinsic pathways for chemoresistance via GP130 signaling
doi: 10.1016/j.xcrm.2024.101658
Figure Lengend Snippet: Humanin-induced chemoresistance requires ATR signaling (A) hGBM1 cells were stimulated with HN or vehicle (Ctrl.), underwent transcriptomics, and differentially expressed genes (DEGs) were analyzed by bioinformatics. (B) Experiments described in (A) were repeated with hGBM-1, 2, and 3 cells providing 12 consistent DEGs, of which several components assembled in a network. (C) HUS1 was associated with outcome in human GBMs. (D) In a myeloid-free brain sample, hGBMs have a basal level of HUS1 expression, which is upregulated by interaction with hiPSC microglia in a GP130-dependent manner. (E and F) Contribution of the ATR pathway to humanin-induced GBM expansion (E) and chemoresistance (F) was demonstrated with the ATR inhibitor AZ20. (G) Western blots showing expression levels of HUS1, ATR and beta-actin (loading control) and a readout for of ATR activation (pT1989) in hGBM1 cells treated with bovine serum albumin (control), TMZ, HN, or AZ20. (H) In summary, AZ20 does not cooperate with TMZ per se, but blocks HN-induced TMZ resistance. The number of biological replicates is indicated (dots in graphs indicate data from individual experiments); all error bars are presented as mean ± SDM. Statistical significance is shown as FDR in (A), one-way ANOVA (D, E), or two-way ANOVA (F): ∗ p < 0.05; ∗∗∗ p < 0.001; ∗∗∗∗ p < 0.0001; NS, not significant.
Article Snippet: HUS1 shRNA lentiviral and non-target control constructs , BioCat , Cat#: TLHSU1400-3364-pZIP-hCMV-ZsGreen-GVO-TRI.
Techniques: Expressing, Western Blot, Control, Activation Assay