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- W2963670165 abstract "Abstract Aberrant activation of the MET /hepatocyte growth factor ( HGF ) receptor participates in the malignant behavior of cancer cells, such as invasion‐metastasis and resistance to molecular targeted drugs. Many mutations in the MET extracellular region have been reported, but their significance is largely unknown. Here, we report the dysregulation of mutant MET originally found in a lung cancer patient with Val370 to Asp370 (V370D) replacement located in the extracellular SEMA domain. MET ‐knockout cells were prepared and reconstituted with WT ‐ MET or V370D‐ MET . HGF stimulation induced MET dimerization and biological responses in cells reconstituted with WT ‐ MET , but HGF did not induce MET dimerization and failed to induce biological responses in V370D‐ MET cells. The V370D mutation abrogated HGF ‐dependent drug resistance of lung cancer cells to epidermal growth factor receptor‐tyrosine kinase inhibitors ( EGFR ‐ TKI ). Compared with WT ‐ MET cells, V370D‐ MET cells showed different activation patterns in receptor tyrosine kinases upon exposure to survival/growth‐stressed conditions. Surface plasmon resonance analysis indicated that affinity between the extracellular region of V370D‐ MET and HGF was reduced compared with that for WT ‐ MET . Further analysis of the association between V370D‐ MET and the separate domains of HGF indicated that the SP domain of HGF was unchanged, but its association with the NK 4 domain of HGF was mostly lost in V370D‐ MET . These results indicate that the V370D mutation in the MET receptor impairs the functional association with HGF and is therefore a loss‐of‐function mutation. This mutation may change the dependence of cancer cell growth/survival on signaling molecules, which may promote cancer cell characteristics under certain conditions." @default.
- W2963670165 created "2019-07-30" @default.
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- W2963670165 date "2019-08-13" @default.
- W2963670165 modified "2023-09-26" @default.
- W2963670165 title "Impaired ligand‐dependent <scp>MET</scp> activation caused by an extracellular <scp>SEMA</scp> domain missense mutation in lung cancer" @default.
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- W2963670165 doi "https://doi.org/10.1111/cas.14142" @default.
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