- Lung and Thoracic cancer
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Integrin αvβ3 Induces HSP90 Inhibitor Resistance via FAK Activation in KRAS-Mutant Non-Small Cell Lung Cancer
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Shinkyo Yoon, Hannah Yang, Hyun-Min Ryu, Eunjin Lee, Yujin Jo, Seyoung Seo, Deokhoon Kim, Chang Hoon Lee, Wanlim Kim, Kyung Hae Jung, Sook Ryun Park, Eun Kyung Choi, Sang-We Kim, Kang-Seo Park, Dae Ho Lee
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Cancer Res Treat. 2022;54(3):767-781. Published online September 30, 2021
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DOI: https://doi.org/10.4143/crt.2021.651
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 Abstract
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- Purpose
Heat shock protein-90 (HSP90) remains an important cancer target because of its involvement in multiple oncogenic protein pathways and biologic processes. Although many HSP90 inhibitors have been tested in the treatment of KRAS-mutant non–small cell lung cancer (NSCLC), most, including AUY922, have failed due to toxic effects and resistance generation, even though a modest efficacy has been observed for these drugs in clinical trials. In our present study, we investigated the novel mechanism of resistance to AUY922 to explore possible avenues of overcoming and want to provide some insights that may assist with the future development of successful next-generation HSP90 inhibitors.
Materials and Methods
We established two AUY922-resistant KRAS-mutated NSCLC cells and conducted RNA sequencing to identify novel resistance biomarker.
Results
We identified novel two resistance biomarkers. We observed that both integrin Av (ITGAv) and β3 (ITGB3) induce AUY922-resistance via focal adhesion kinase (FAK) activation, as well as an epithelial-mesenchymal transition, in both in vitro and in vivo xenograft model. mRNAs of both ITGAv and ITGB3 were also found to be elevated in a patient who had shown acquired resistance in a clinical trial of AUY922. ITGAv was induced by miR-142 downregulation, and ITGB3 was increased by miR-150 downregulation during the development of AUY922-resistance. Therefore, miR-150 and miR-142 overexpression effectively inhibited ITGAvB3-dependent FAK activation, restoring sensitivity to AUY922.
Conclusion
The synergistic co-targeting of FAK and HSP90 attenuated the growth of ITGAvB3-induced AUY922-resistant KRAS-mutated NSCLC cells in vitro and in vivo, suggesting that this combination may overcome acquired AUY922-resistance in KRAS-mutant NSCLC.
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Citations
Citations to this article as recorded by  - Integrin αV Inhibition by GMI, a Ganoderma Microsporum Immunomodulatory Protein, Abolish Stemness and Migration in EGFR‐Mutated Lung Cancer Cells Resistant to Osimertinib
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Journal of Neuro-Oncology.2024; 170(2): 331. CrossRef - Autophagy, molecular chaperones, and unfolded protein response as promoters of tumor recurrence
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Cancer and Metastasis Reviews.2023; 42(1): 217. CrossRef
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