Journal: Molecular & Cellular Proteomics : MCP
Article Title: LIN28A-Dependent Kinome and Phosphoproteome Reprogramming Promotes Imatinib Resistance
doi: 10.1016/j.mcpro.2026.101514
Figure Lengend Snippet: Essential role for LIN28A in imatinib resistance. A , proteomic and phosphoproteomic analyses reveal altered expression and phosphorylation of LIN28A interactors/regulators in the let-7-independent pathway. B , significant upregulation of DIS3L2, a negative regulator of let-7, in ImR cells. C , RT-PCR analysis demonstrating reduced abundance of let-7 family miRNAs in ImR cells compared to K562, with or without 1 μM imatinib treatment (mean ± SEM; n = 3 biological replicates). D , increased abundance of let-7 target proteins in ImR cells, as shown by GSEA normalized enrichment score. E , western blot validation of LIN28A overexpression in K562-LIN28A OE cells and depletion in ImR-LIN28A KD cells. F , growth curves showing cell proliferation in 500 nM imatinib over time (mean ± SEM; n = 3–5 independent experiments). Statistical significance: ∗, p < 0.05; ∗∗, p < 0.01; ∗∗∗, p < 0.001; ∗∗∗, p < 0.001; ∗∗∗∗, p < 0.0001 (one-way ANOVA with Tukey’s post hoc test). GSEA, Gene Set Enrichment Analysis; ImR, imatinib resistance.
Article Snippet: For pharmacological studies, cells were treated with inhibitors to various kinases, including BCR-ABL: imatinib (S2475), dasatinib (S1021), or ponatinib (S1490); AKT: AKTi-1/2 (S7776); mTOR: rapamycin (Cayman, 13346); PKC/FLT3: midostaurin (S8064); SGK: GSK650394 (S7209); PDK1: BX-912 (Cayman, 14708; CaMKII: KN-93 (Cayman, 21472); or AXL: bemcentinib (MedChemExpress, HY-15150).
Techniques: Expressing, Phospho-proteomics, Reverse Transcription Polymerase Chain Reaction, Western Blot, Biomarker Discovery, Over Expression