Erschienen in:
01.02.2018 | Original Article
A multi-institution phase II study of docetaxel and S-1 in combination with trastuzumab for HER2-positive advanced gastric cancer (DASH study)
verfasst von:
Shunsuke Kagawa, Atsushi Muraoka, Takeshi Kambara, Hiroshi Nakayama, Ryosuke Hamano, Norimitsu Tanaka, Kazuhiro Noma, Kohji Tanakaya, Hiroyuki Kishimoto, Kunitoshi Shigeyasu, Shinji Kuroda, Satoru Kikuchi, Kazuya Kuwada, Masahiko Nishizaki, Yasuhiro Shirakawa, Toshiyoshi Fujiwara
Erschienen in:
Cancer Chemotherapy and Pharmacology
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Ausgabe 2/2018
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Abstract
Background
Trastuzumab when combined with fluoropyrimidine and cisplatin was proven to improve survival in patients with human epidermal growth factor receptor 2 (HER2)-positive gastric cancer (GC) in the ToGA study. The safety and efficacy of trastuzumab in combination with docetaxel and S-1 have not yet been evaluated.
Methods
This study was a multicenter, phase II study. Patients with chemotherapy-naïve HER2-positive advanced or metastatic GC were eligible. Trastuzumab was administered intravenously on day 1 of the first cycle at 8 and 6 mg/kg in subsequent cycles. Docetaxel was administered intravenously at 40 mg/m2 on day 1 of each cycle. S-1 was administered at a dosage based on body surface area for 14 days in a 3-weekly cycle. The primary endpoint was progression-free survival (PFS).
Results
A total of 23 patients were enrolled. Median PFS was 6.7 months (95% CI 4.1–10.1). The response rate (RR) was 39.1%. Median overall survival (OS) and time to treatment failure (TTF) were 17.5 and 4.4 months, respectively. Major grade 3–4 adverse events were neutropenia (39.1%), leukopenia (30.4%), and febrile neutropenia (8.7%).
Conclusion
Trastuzumab in combination with docetaxel and S-1 showed effective antitumor activity and manageable toxicities as first-line treatment for patients with HER2-positive GC.