1. Academic Validation
  2. The synergistic role of ATP-dependent drug efflux pump and focal adhesion signaling pathways in vinorelbine resistance in lung cancer

The synergistic role of ATP-dependent drug efflux pump and focal adhesion signaling pathways in vinorelbine resistance in lung cancer

  • Cancer Med. 2018 Feb;7(2):408-419. doi: 10.1002/cam4.1282.
Takao Nakanishi 1 2 Toshi Menju 1 Shigeto Nishikawa 1 Koji Takahashi 1 Ryo Miyata 1 Kei Shikuma 1 Terumasa Sowa 1 Naoto Imamura 3 Masatsugu Hamaji 1 Hideki Motoyama 1 Kyoko Hijiya 1 Akihiro Aoyama 1 Toshihiko Sato 4 Toyofumi F Chen-Yoshikawa 1 Makoto Sonobe 1 Hiroshi Date 1
Affiliations

Affiliations

  • 1 Department of Thoracic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
  • 2 Department of Thoracic Surgery, Kobe-City Nishi-Kobe Medical Center, Kobe, Japan.
  • 3 Department of Thoracic Surgery, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan.
  • 4 Institute for Advancement of Clinical and Translational Science, Kyoto University Hospital, Kyoto, Japan.
Abstract

The vinorelbine (VRB) plus cisplatin regimen is widely used to treat non-small cell lung Cancer (NSCLC), but its cure rate is poor. Drug resistance is the primary driver of chemotherapeutic failure, and the causes of resistance remain unclear. By focusing on the focal adhesion (FA) pathway, we have highlighted a signaling pathway that promotes VRB resistance in lung Cancer cells. First, we established VRB-resistant (VR) lung Cancer cells (NCI-H1299 and A549) and examined its transcriptional changes, protein expressions, and activations. We treated VR cells by Src Family Kinase (SFK) inhibitors or gene silencing and examined cell viabilities. ATP-binding Cassette Sub-family B Member 1 (ABCB1) was highly expressed in VR cells. A pathway analysis and western blot analysis revealed the high expression of integrins β1 and β3 and the activation of FA pathway components, including Src family kinase (SFK) and Akt, in VR cells. SFK involvement in VRB resistance was confirmed by the recovery of VRB sensitivity in FYN knockdown A549 VR cells. Saracatinib, a dual inhibitor of SFK and ABCB1, had a synergistic effect with VRB in VR cells. In conclusion, ABCB1 is the primary cause of VRB resistance. Additionally, the FA pathway, particularly Integrin, and SFK, are promising targets for VRB-resistant lung Cancer. Further studies are needed to identify clinically applicable target drugs and biomarkers that will improve disease prognoses and predict therapeutic efficacies.

Keywords

ATP-Binding Cassette Subfamily B Member 1; Src family kinase (SFK); chemotherapeutic resistance; focal adhesion pathway; non-small cell lung cancer; saracatinib; vinorelbine.

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