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  • Title: A phase I study of triplet combination chemotherapy of paclitaxel, cisplatin and S-1 in patients with advanced gastric cancer.
    Author: Kimura Y, Yano H, Imamura H, Fujitani K, Imano M, Tokunaga Y, Matsuoka M, Kurokawa Y, Shimokawa T, Takiuchi H, Tsujinaka T, Furukawa H.
    Journal: Jpn J Clin Oncol; 2013 Feb; 43(2):125-31. PubMed ID: 23225911.
    Abstract:
    OBJECTIVE: S-1 and cisplatin combination therapy is a standard regimen for patients with advanced gastric cancer in Japan. The primary objective of this study was to determine the maximum tolerated dose and dose-limiting toxicities of a triplet regimen adding paclitaxel to S-1 and cisplatin combination therapy. METHODS: Patients with previously untreated metastatic or recurrent gastric cancer were enrolled. Patients received S-1 (40 mg/m(2) p.o., twice daily, on days 1-21 every 35 days), cisplatin (30 mg/m(2) divided, on days 1 and 15) and paclitaxel (divided on days 1 and 15). The starting dose of paclitaxel was 50 mg/m(2) (level 1); the dose was escalated to 60 (level 2), 70 (level 3) and 80 mg/m(2) (level 4) in a stepwise fashion. Dose-limiting toxicity was determined during the first treatment cycle. RESULTS: Eighteen patients enrolled. During the first cycle, no dose-limiting toxicity was observed at dose levels 1 and 2. At dose level 3, one of the six patients had dose-limiting toxicity (one patient had grade 4 neutropenia) and at dose level 4, one of the six patients had dose-limiting toxicity (one patient had febrile neutropenia, hypoalbuminemia and fatigue of grade 3). The maximum tolerated dose was not reached at level 4; however, grade 3 hyponatremia and hypokalemia in two of the six patients occurred during the second treatment course at level 4. From the point of view of safety in the outpatient setting, the recommended dose of paclitaxel was determined at 70 mg/m(2). The overall response rate was 50%. CONCLUSIONS: The recommended dose of paclitaxel added to S-1 (80 mg/m(2) days 1-21) plus cisplatin (30 mg/m(2) days 1 and 15) was 70 mg/m(2) on days 1 and 15 of a 5-week cycle.
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