Arsenic circumvents the gefitinib resistance by binding to P62 and mediating autophagic degradation of EGFR in non-small cell lung cancer
Autor: | Zheng Ruan, Zhu Chen, Wenda Xi, Lie Ma, Kongkai Zhu, Cheng Luo, Ru Zhang, Jian-Hua Mao, Xiaodong Xi, Yan Shen, Sai-Juan Chen |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
0301 basic medicine
Cancer Research Lung Neoplasms Cell Survival Immunology Mutant Blotting Western Mice Nude Arsenic 03 medical and health sciences Cellular and Molecular Neuroscience T790M chemistry.chemical_compound 0302 clinical medicine Gefitinib Carcinoma Non-Small-Cell Lung Cell Line Tumor medicine Animals Humans Epidermal growth factor receptor Arsenic trioxide Kinase activity Phosphorylation lcsh:QH573-671 Lung cancer Cell Proliferation A549 cell biology Chemistry lcsh:Cytology RNA-Binding Proteins Cell Biology medicine.disease respiratory tract diseases ErbB Receptors 030104 developmental biology A549 Cells 030220 oncology & carcinogenesis Cancer research biology.protein medicine.drug |
Zdroj: | Cell Death and Disease, Vol 9, Iss 10, Pp 1-15 (2018) |
ISSN: | 2041-4889 |
Popis: | Non-small cell lung cancer (NSCLC) is characterized by hyperexpression and/or gain-of-function mutations of the epidermal growth factor receptor (EGFR), resulting in an elevated overall kinase activity. Gefitinib is remarkably effective in patients with the L858R or ΔE746-A750-mutated of EGFR. However, drug resistance tends to develop because of the emergence of T790M mutation on EGFR. New strategies other than repressing kinase activity are thus required to treat NSCLC, thereby circumventing the resistance. In this study, arsenic trioxide (ATO) at 2 μM significantly inhibited the proliferation of the gefitinib-resistant NCI-H1975 cells of the EGFR L858R/T790M mutant compared with a modest inhibition in the gefitinib-sensitive HCC827 cells of ΔE746-A750 mutant and A549 cells of wild-type EGFR. Moreover, ATO significantly inhibited the overall kinase activity of EGFR primarily through quantitatively diminishing the EGFR in NCI-H1975 cells to an extent comparable with that reached by gefitinib in HCC827 cells. Furthermore, ATO promoted autophagic degradation of EGFR in NSCLC cells by directly binding to P62, which interacted with EGFR, preferentially the L858R/T790M mutant providing a plausible explanation for a more favorable effect of ATO on NCI-H1975 cells. Accordingly, the effect of ATO was further confirmed in the NSCLC xenograft mouse models. Our results reveal a new target for ATO with a unique molecular mechanism, i.e., ATO suppresses the overall catalytic potential of EGFR, significantly those with the L858R/T790M mutant in NCI-H1975 cells, through an autophagic degradation by interacting with P62. This study potentially offers an innovative therapeutic avenue for the NSCLC with L858R/T790M-mutated EGFR. |
Databáze: | OpenAIRE |
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