PMID: 16619558Apr 20, 2006Paper

A phase I study of bi-weekly combination therapy with S-1 and docetaxel for advanced or recurrent gastric cancer

Anticancer Research
Yasushi RinoToshio Imada

Abstract

S-1 is a novel oral fluorouracil antitumor drug that contains a combination of 3 pharmacological agents: tegafur (FT), a 5-fluorouracil (5-FU) prodrug, 5-chloro-2,4-dihydroxypyridine (CDHP), which inhibits the activity of dihydropyrimidine dehydrogenase (DPD), and potassium oxonate (Oxo), which reduces the gastrointestinal toxicity of 5-FU. S-1 and docetaxel have both been identified as effective agents for the treatment of gastric cancer. However, little is known about the effects and/or adverse effects of a combination of these drugs in the treatment of gastric cancer. The aim of this phase I study was to determine the maximum-tolerated dose (MTD) and the recommended dose of docetaxel with a fixed dose of S-1 in patients with advanced or recurrent gastric cancer. Patients with metastatic, recurrent, or unresectable gastric cancer received docetaxel at a starting dose of 25 mg/m2 by i.v. infusion over 1 h on days 1, 15 and 29, and S-1 at the full dose of 80 mg/m2 daily for 4 weeks of every 6 weeks. Nine patients were treated with increasing dosages of docetaxel as follows: (docetaxel/S-1, mg/m2): 25/80 (level 1), 30/80 (level 2) and 35/80 (level 3). All cases were assessable for drug safety and 7 were assessable for response. ...Continue Reading

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