A phase II study of modified dose-dense paclitaxel and every 4-week carboplatin for the treatment of advanced-stage primary epithelial ovarian, fallopian tube, or peritoneal carcinoma

Abstract

Traditional dose-dense chemotherapy regimens for advanced stage ovarian cancer incorporate weekly paclitaxel on a 21-day cycle and are associated with favorable efficacy but high rates of neutropenia, thrombocytopenia, and anemia. The purpose of this phase II study was to assess the response rate and toxicity of modified dose-dense paclitaxel and every 4-week carboplatin for the treatment of advanced-stage ovarian, fallopian tube, and primary peritoneal carcinoma. All eligible patients were treated with 6 cycles of intravenous dose-dense paclitaxel (80 mg/m²) days 1, 8, and 15 and carboplatin (AUC 5 or 6) Day 1 during a 28-day cycle in accordance with an IRB-approved protocol. Patients who had clinically defined stable disease or better with a CA-125 ≤ 35 U/ml following the completion of primary induction therapy were subsequently administered a planned 12 cycles of paclitaxel (135 mg/m²; every 21 days) consolidation therapy. Eighty-eight patients received at least 3 cycles of induction dose-dense chemotherapy, of whom 76 completed 6 cycles of chemotherapy; the overall response rate was 84.2 % (56.6 % complete response). Fifty-three patients received an aggregate 473 cycles (median = 9; range 1-12) of consolidation chemotherapy. Grade 3-4 hematological toxicity included neutropenia (22.7 %), thrombocytopenia (7.9 %), and anemia (1.1 %). Further, grade 3 neuropathy developed in one (1.1 %) patient. The patients' median disease-free survival and overall survival were 22.5 and 31.5 months, respectively. This phase II study suggests that first-line treatment comprising modified dose-dense paclitaxel and monthly carboplatin chemotherapy with paclitaxel consolidation therapy preserves the efficacy of traditional dose-dense chemotherapy, while minimizing hematologic toxicity.