Abstract
Objective
Second-line treatment with paclitaxel and carboplatin enhances survival of women with platinum-sensitive recurrent ovarian cancer (ROC). However, because of its cumulative neurotoxicity, there is a strong demand for platinum-combinations with better therapeutic index. Because of its pharmacological properties, topotecan is a good adjunct to carboplatin in this setting, but its safety and efficacy remains to be defined.
Methods
Patients with platinum-sensitive ROC were eligible in this multicenter phase I/II study, stratified according to treatment-free interval (TFI). Dose level 0 consisted of topotecan 1 mg/m2/d1–3/q21d plus carboplatin AUC5/d3/q21d. DLT was defined as grade ≥3 neutropenia or thrombocytopenia or grade ≥3 non-hematological toxicity excluding alopecia, nausea and vomiting, accompanied by a treatment delay >1 week.
Results
From June 2004 to August 2005, 26 patients were enrolled, receiving a total of 145 cycles of chemotherapy. MTD was reached at topotecan 0.75 mg/m2 and carboplatin AUC5. We observed a single grade 4 leucopenia. There were 3 (12%), 15 (58%) and 8 (31%) events of grade 3/4 hematological anaemia, leucopenia, and thrombocytopenia. Response rate was 67% (95% CI 43–85), median progression-free survival 9.5 months (95% CI 7.3–12.0), median overall survival 19.4 months (95% CI 12.3–26.9). None of the toxicity or efficacy endpoints were associated with TFI.
Conclusion
Topotecan and carboplatin is a well tolerated novel doublet option for women with platinum sensitive ROC. We encourage further studies on this approach, but to limit the doses of topotecan to 0.75 mg/m2/d1–3 and carboplatin AUC 5/d3.
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Notes
HECTOR; Hycamtin et carboplatin versus established regimens in the treatment of replapsed ovarian cancer.
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We would like to thank the nurses, study-coordinators and patients who participated in this trial.
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Koensgen, D., Stengel, D., Belau, A. et al. Topotecan and carboplatin in patients with platinum-sensitive recurrent ovarian cancer. Results of a multicenter NOGGO: phase I/II study. Cancer Chemother Pharmacol 62, 393–400 (2008). https://doi.org/10.1007/s00280-007-0617-2
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DOI: https://doi.org/10.1007/s00280-007-0617-2