Open Access

Integrin α5 promotes migration and invasion through the FAK/STAT3/AKT signaling pathway in icotinib‑resistant non‑small cell lung cancer cells

  • Authors:
    • Yang Yang
    • Yizhe Wang
    • Xiaofang Che
    • Kezuo Hou
    • Jie Wu
    • Chunlei Zheng
    • Yang Cheng
    • Yunpeng Liu
    • Xuejun Hu
    • Jingdong Zhang
  • View Affiliations

  • Published online on: May 24, 2021     https://doi.org/10.3892/ol.2021.12817
  • Article Number: 556
  • Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Patients with non‑small cell lung cancer (NSCLC) treated with EGFR‑tyrosine kinase inhibitors (TKIs) ultimately develop drug resistance and metastasis. Therefore, there is a need to identify the underlying mechanisms of resistance to EGFR‑TKIs. In the present study, colony formation and MTT assays were performed to investigate cell viability following treatment with icotinib. Gene Expression Omnibus datasets were used to identify genes associated with resistance. Wound healing and Transwell assays were used to detect cell migration and invasion with icotinib treatment and integrin α5‑knockdown. The expression levels of integrin α5 and downstream genes were detected using western blotting. Stable icotinib‑resistant (IcoR) cell lines (827/IcoR and PC9/IcoR) were established that showed enhanced malignant properties compared with parental cells (HCC827 and PC9). Furthermore, the resistant cell lines were resistant to icotinib in terms of proliferation, migration and invasion. The enrichment of function and signaling pathways analysis showed that integrin α5‑upregulation was associated with the development of icotinib resistance. The knockdown of integrin α5 attenuated the migration and invasion capability of the resistant cells. Moreover, a combination of icotinib and integrin α5 siRNA significantly inhibited migration and partly restored icotinib sensitivity in IcoR cells. The expression levels of phosphorylated (p)‑focal adhesion kinase (FAK), p‑STAT3 and p‑AKT decreased after knockdown of integrin α5, suggesting that FAK/STAT3/AKT signaling had a notable effect on the resistant cells. The present study revealed that the integrin α5/FAK/STAT3/AKT signaling pathway promoted icotinib resistance and malignancy in IcoR NSCLC cells. This signaling pathway may provide promising targets against acquired resistance to EGFR‑TKI in patients with NSCLC.
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July-2021
Volume 22 Issue 1

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Copy and paste a formatted citation
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Spandidos Publications style
Yang Y, Wang Y, Che X, Hou K, Wu J, Zheng C, Cheng Y, Liu Y, Hu X, Zhang J, Zhang J, et al: Integrin α5 promotes migration and invasion through the FAK/STAT3/AKT signaling pathway in icotinib‑resistant non‑small cell lung cancer cells. Oncol Lett 22: 556, 2021
APA
Yang, Y., Wang, Y., Che, X., Hou, K., Wu, J., Zheng, C. ... Zhang, J. (2021). Integrin α5 promotes migration and invasion through the FAK/STAT3/AKT signaling pathway in icotinib‑resistant non‑small cell lung cancer cells. Oncology Letters, 22, 556. https://doi.org/10.3892/ol.2021.12817
MLA
Yang, Y., Wang, Y., Che, X., Hou, K., Wu, J., Zheng, C., Cheng, Y., Liu, Y., Hu, X., Zhang, J."Integrin α5 promotes migration and invasion through the FAK/STAT3/AKT signaling pathway in icotinib‑resistant non‑small cell lung cancer cells". Oncology Letters 22.1 (2021): 556.
Chicago
Yang, Y., Wang, Y., Che, X., Hou, K., Wu, J., Zheng, C., Cheng, Y., Liu, Y., Hu, X., Zhang, J."Integrin α5 promotes migration and invasion through the FAK/STAT3/AKT signaling pathway in icotinib‑resistant non‑small cell lung cancer cells". Oncology Letters 22, no. 1 (2021): 556. https://doi.org/10.3892/ol.2021.12817