Final Results of a Randomized Phase 2 Study Comparing Carboplatin Plus Irinotecan (Ci) Versus Carboplatin Plus Amrubicin (Ca) for Extensive Disease Small-Cell Lung Cancer: Njlcg0901

Final Results of a Randomized Phase 2 Study Comparing Carboplatin Plus Irinotecan (Ci) Versus Carboplatin Plus Amrubicin (Ca) for Extensive Disease Small-Cell Lung Cancer: Njlcg0901

Annals of Oncology 25 (Supplement 4): iv511–iv516, 2014 doi:10.1093/annonc/mdu355.14 SCLC 1476P Aim: Cisplatin-based regimens are standard first-lin...

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Annals of Oncology 25 (Supplement 4): iv511–iv516, 2014 doi:10.1093/annonc/mdu355.14

SCLC 1476P

Aim: Cisplatin-based regimens are standard first-line chimotherapy for extensive-disease small -ell lung cancer (ED-SCLC). In patients (pts) unfit for cisplatin due to advanced age or poor performance status (PS), carboplatin plus etoposide (CE) is as effective as cisplatin plus etoposide (JCOG9702 trial), although its efficacy is not satisfactory. Carboplatin plus irinotecan (CI) and carboplatin plus amrubicin (CA) are promising new carboplatin-based regimens identified in our previous studies (NJLCG0405 and NJLCG0711). Accordingly, we conducted this randomized phase 2 study to compare these two regimens to select the more appropriate candidate for future phase 3 trials. Methods: Chemotherapy-naive ED-SCLC pts were randomly assigned to receive 4-6 cycles of carboplatin (area under the curve [AUC] 5.0, day 1) plus irinotecan (70mg/ m2,days 1 and 8) every 3 weeks (CI) or carboplatin (AUC 4.0, day1) plus amrubicin (mg/m2, days 1-3) every 3 weeks (CI). The primary endpoint was the overall response rate (ORR). The secondary endpoints were progression-free survival (PFS), overall survival (OS),and toxicity. Assuming that an ORR of 80% in eligible pts indicates potential usefulness and an ORR of 60% is the lower limit of interest, the target sample size was 35 pts in each arm (alpha, 0.05; beta, 0.80). Results: Between December 2009 and March 2013, 71 pts were enrolled. One patient in CI and one patient in CA did not receive any protocol treatment due to rapid disease progression. Pt median age was 70 (51-84), with 16% female, and 91% of pts had good PS (0-1). The ORRs were 79% ( 95% confidence interval [CI]: 62-91) and 89% (95%CI: 73-93), median PFS were 5.1 and 6.2 months (hazard ratio [HR]=0.59, 95%CI: 0.35-0.98, p=0.042), and median overall survival were 12.2 months and 15.9 months with CI and CA, respectively. In the elderly (not less than 70), CA showed similar favorable effects compared with CI as well as less than 70.Toxicities of grade 3 or higher severity were neutropenia (CI, 53% and CA, 89%), anemia (CI, 26% and CA, 20%), thrombocytopenia (CI, 18% and CA, 14%), and febrile neutropenia (CI, 12% and CA, 29%). No treatment-related deaths were observed. Conclusions: CA was numerically more effective than CI in chemo-naive ED-SCLC, with acceptable toxicity. This regimen could be selected for phase 3 trials. Disclosure: All authors have declared no conflicts of interest.

abstracts

Y. Tsukita1, N. Morikawa2, S. Sugawara3, M. Maemondo1, T. Harada4, M. Harada5, A. Inoue6, Y. Kawashima3, Y. Fujita7, T. Kato8, H. Yokouchi9, H. Watanabe10, K. Usui11, T. Suzuki12, S. Oizumi13, H. Nagai14, M. Kanbe15, T. Nukiwa16 1 Department of Respiratory Medicine, Miyagi Cancer Center, Natori, JAPAN 2 Pulmonary Medicine, Allergy and Rheumatology, Iwate Medical University School of Medicine, Iwate, JAPAN 3 Department of Respiratory Medicine, Sendai Kousei Hospital, Sendai, JAPAN 4 Center for Respiratory Diseases, JCHO Hokkaido Hospital, Sapporo, JAPAN 5 Department of Pulmonary Disease, National Hospital Organization Hokkaido Cancer Center, Sapporo, JAPAN 6 Department of Respiratory Medicine, Tohoku University, Sendai, JAPAN 7 Department of Respiratory Medicine, National Hospital Organization Asahikawa Medical Center, Asahikawa, JAPAN 8 Department of Respiratory Medicine, Kanagawa Cardiovasucular and Respiratory Center, Yokohama, JAPAN 9 Pulmonary Medicine, Fukushima Medical University, Fukushima, JAPAN 10 Respiratory Medicine, Saka Genaral Hospital, Shiogama, JAPAN 11 Division of Respirology, NTT Medical Center Tokyo, Tokyo, JAPAN 12 Division of Respiratory Medicine, Iwate Prefectural Central Hospital, Morioka, JAPAN 13 First Department of Medicine, Hokkaido University School of Medicine, Sapporo, JAPAN 14 Respiratory Medicine, Kyoto University-Graduate School of Medicine, Kyoto, JAPAN 15 Internal Medicine, Senseki Hospital, Shiogama, JAPAN

South Miyagi Medical Center, Miyagi, JAPAN

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FINAL RESULTS OF A RANDOMIZED PHASE 2 STUDY COMPARING CARBOPLATIN PLUS IRINOTECAN (CI) VERSUS CARBOPLATIN PLUS AMRUBICIN (CA) FOR EXTENSIVE DISEASE SMALL-CELL LUNG CANCER: NJLCG0901

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© European Society for Medical Oncology 2014. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved. For permissions, please email: [email protected].