Fig. 4: Shc1–ShcBP1 axis activates AXL signaling and induces adaptive resistance to HER2-TKIs. | npj Precision Oncology

Fig. 4: Shc1–ShcBP1 axis activates AXL signaling and induces adaptive resistance to HER2-TKIs.

From: AXL–SHC1 signaling axis mediates adaptive resistance to HER2-targeted tyrosine kinase inhibitors in HER2-aberrant lung and gastric cancers

Fig. 4: Shc1–ShcBP1 axis activates AXL signaling and induces adaptive resistance to HER2-TKIs.The alternative text for this image may have been generated using AI.

A Combination of mobocertinib and knockdown of several adapter proteins in Calu-3. and MKN7 cells. Calu-3 and MKN7 cells treated with nonspecific control, FYN, GRB2, PTPN11, Shc1, or SRC-specific siRNAs were incubated with or without mobocertinib (0.01 or 0.1 μmol/L) for 72 h, and cell viability was detected using MTT assays. *P < 0.05 compared with nonspecific control siRNA (two-way ANOVA). Data are represented as the mean ± S.D. B Western blotting of Calu-3 and MKN7 cells treated with nonspecific control siRNA or Shc1-specific siRNA and incubated with or without mobocertinib (0.01 or 0.1 μmol/L) for 24 h. C Calu-3 and MKN7 cells treated with or without mobocertinib (Mobo; 0.01 or 0.1 μmol/L) for 24 h were detected by western blotting with immunoprecipitation of the indicated proteins. D Western blotting showing nuclear localization of ShcBP1 in Calu-3 and MKN7 cells treated with mobocertinib (0.01 or 0.1 μmol/L) for 72 h. E Immunofluorescence showing nuclear localization of ShcBP1 in Calu-3 and MKN7 cells treated with mobocertinib (0.01 or 0.1 μmol/L) for 72 h. F MTT assays assessing cell viability of Calu-3 and MKN7 treated with nonspecific siRNA or ShcBP1-specific siRNAs, and incubated with or without mobocertinib *P < 0.05 (one-way ANOVA). G Schematic diagram illustrating the drug tolerance mechanisms, including GAS6–AXL activation through the SHC1BP–SHC1 complex, in HER2-aberrant cancer cells.

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