Abstract
Purpose
Gefitinib is an effective first-line chemotherapy for advanced non-small cell lung cancer (NSCLC) patients harboring sensitive EGFR mutations. However, whether second-line platinum combination chemotherapy after first-line gefitinib treatment shows similar effects to first-line platinum combination chemotherapy in these patients remains unclear. Therefore, we here aimed to investigate the efficacy of platinum combination chemotherapy after first-line gefitinib treatment in NSCLC patients harboring sensitive EGFR mutations.
Methods/patients
We retrospectively evaluated the clinical effects of second-line platinum combination chemotherapy after first-line gefitinib treatment in NSCLC patients harboring sensitive EGFR mutations (exon 19 deletion or exon 21 L858R mutation) at five institutions. All patients were initially treated with gefitinib (250 mg/day) followed by platinum combination chemotherapy as second-line chemotherapy.
Results
Between January 2006 and December 2012, 42 patients [8 men, 34 women; median age, 63 years (range 39–75 years)] were enrolled. The overall response rate, disease control rate, and median progression-free survival (PFS) were 26.2, 61.9 %, and 5.1 months, respectively, after the second-line treatment. The corresponding values for first-line gefitinib treatment were 69.0, 95.2 %, and 11.1 months, respectively. Moreover, second-line platinum combination chemotherapy with pemetrexed or bevacizumab-containing regimens was independently associated with improved PFS.
Conclusions
Second-line platinum combination chemotherapy after first-line gefitinib treatment in NSCLC patients harboring sensitive EGFR mutations was effective and showed equivalent outcomes to first-line platinum combination chemotherapy. After failure of first-line gefitinib therapy, second-line platinum combination chemotherapy with pemetrexed or bevacizumab might result in improved PFS.
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Abbreviations
- CR:
-
Complete response
- EGFR:
-
Epidermal growth factor receptor
- NSCLC:
-
Non-small cell lung cancer
- OS:
-
Overall survival
- PD:
-
Progressive disease
- PFS:
-
Progression-free survival
- PPS:
-
Post-progression survival
- PR:
-
Partial response
- RR:
-
Response rate
- SD:
-
Stable disease
- TKI:
-
Tyrosine kinase inhibitor
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Acknowledgments
We thank Ms. Keiko Kogure and Drs. Takashi Osaki, Mie Kotake, Yosuke Kamide, Akihiro Ono, and Yasuhiko Koga for their assistance in preparing this manuscript.
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The authors declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
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T. Masuda and H. Imai contributed equally to this work.
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Masuda, T., Imai, H., Kuwako, T. et al. Efficacy of platinum combination chemotherapy after first-line gefitinib treatment in non-small cell lung cancer patients harboring sensitive EGFR mutations. Clin Transl Oncol 17, 702–709 (2015). https://doi.org/10.1007/s12094-015-1297-8
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DOI: https://doi.org/10.1007/s12094-015-1297-8