Open Access

Favorable effect of the combination of vinorelbine and dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine in EGFR‑mutated lung adenocarcinoma: Retrospective and in vitro studies

  • Authors:
    • Hiroki Izumi
    • Hirokazu Touge
    • Tadashi Igishi
    • Haruhiko Makino
    • Shizuka Nishii‑Ito
    • Miyako Takata
    • Hirofumi Nakazaki
    • Yasuto Ueda
    • Shingo Matsumoto
    • Masahiro Kodani
    • Jun Kurai
    • Kenichi Takeda
    • Tomohiro Sakamoto
    • Masaaki Yanai
    • Natsumi Tanaka
    • Chaitanya S. Nirodi
    • Eiji Shimizu
  • View Affiliations

  • Published online on: January 7, 2015     https://doi.org/10.3892/ijo.2015.2815
  • Pages: 989-998
  • Copyright: © Izumi et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Although cytotoxic chemotherapy is essential in epidermal growth factor receptor (EGFR)‑mutated non‑small cell lung cancer (NSCLC), it is unclear which regimen is most effective. We retrospectively compared the efficacy of standard platinum‑based chemotherapy with that of combination chemotherapy using vinorelbine (VNR) plus dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine (DIF) in EGFR‑mutated lung adenocarcinomas, and we investigated a potential mechanism by which the combination chemotherapy of VNR + DIF was favorable in the treatment of EGFR‑mutated lung adenocarcinoma in vitro. In our retrospective analysis, the response rate and disease control rate afforded by the VNR + DIF treatment tended to be better than those by platinum‑based chemotherapy, and the progression‑free survival of the 24 VNR + DIF‑treated patients was significantly longer than that of the 15 platinum‑based chemotherapy patients. In EGFR‑mutated PC9 cells, VNR induced EGFR dephosphorylation at a clinically achievable concentration. 1BR3‑LR cells, a line of fibroblast cells transfected with a mutant EGFR construct, were completely resistant to gefitinib in the medium containing 10% fetal bovine serum (FBS), whereas the sensitivity of these cells to gefitinib was increased in 0.5% FBS‑containing medium. Similarly, the sensitivity of 1BR3‑LR cells to VNR was increased when they were cultured in low‑serum condition. In addition, sodium orthovanadate (Na3VO4) inhibited the EGFR dephosphorylation induced by VNR or gefitinib and suppressed the cell growth inhibition by these agents in PC9 cells. VNR and gefitinib showed synergistic cell growth inhibition in combination with 5‑fluorouracil (5‑FU) in PC9 cells. We propose that the EGFR dephosphorylation induced by VNR is related to cell growth inhibitory activity of VNR, and that this is one of the mechanisms of the synergistic effect of VNR + 5‑FU in EGFR‑mutated lung cancer cells. In conclusion, the combination chemotherapy of VNR + DIF may be a promising treatment for NSCLC patients with EGFR mutations.
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March-2015
Volume 46 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Izumi H, Touge H, Igishi T, Makino H, Nishii‑Ito S, Takata M, Nakazaki H, Ueda Y, Matsumoto S, Kodani M, Kodani M, et al: Favorable effect of the combination of vinorelbine and dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine in EGFR‑mutated lung adenocarcinoma: Retrospective and in vitro studies. Int J Oncol 46: 989-998, 2015.
APA
Izumi, H., Touge, H., Igishi, T., Makino, H., Nishii‑Ito, S., Takata, M. ... Shimizu, E. (2015). Favorable effect of the combination of vinorelbine and dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine in EGFR‑mutated lung adenocarcinoma: Retrospective and in vitro studies. International Journal of Oncology, 46, 989-998. https://doi.org/10.3892/ijo.2015.2815
MLA
Izumi, H., Touge, H., Igishi, T., Makino, H., Nishii‑Ito, S., Takata, M., Nakazaki, H., Ueda, Y., Matsumoto, S., Kodani, M., Kurai, J., Takeda, K., Sakamoto, T., Yanai, M., Tanaka, N., Nirodi, C. S., Shimizu, E."Favorable effect of the combination of vinorelbine and dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine in EGFR‑mutated lung adenocarcinoma: Retrospective and in vitro studies". International Journal of Oncology 46.3 (2015): 989-998.
Chicago
Izumi, H., Touge, H., Igishi, T., Makino, H., Nishii‑Ito, S., Takata, M., Nakazaki, H., Ueda, Y., Matsumoto, S., Kodani, M., Kurai, J., Takeda, K., Sakamoto, T., Yanai, M., Tanaka, N., Nirodi, C. S., Shimizu, E."Favorable effect of the combination of vinorelbine and dihydropyrimidine dehydrogenase‑inhibitory fluoropyrimidine in EGFR‑mutated lung adenocarcinoma: Retrospective and in vitro studies". International Journal of Oncology 46, no. 3 (2015): 989-998. https://doi.org/10.3892/ijo.2015.2815