title: Phase I/II study of S-1 combined with cisplatin in patients with advanced gastric cancer.
abstract: A dose-escalation study of cisplatin (CDDP) combined with S-1, a new oral dihydropyrimidine dehydrogenase inhibitory fluoropyrimidine, was performed to determine the maximum-tolerated dose (MTD), recommended dose (RD), dose-limiting toxicities (DLTs), and objective response rate (RR) in advanced gastric cancer (AGC). S-1 was given orally at 40 mg m(-2) b.i.d. for 21 consecutive days following a 2-week rest. CDDP was planned to be given intravenously on day 8, at a dose of 60, 70, or 80 mg m(-2) depending on the DLT. Treatment was repeated every 5 weeks, unless disease progression was observed. In the phase I portion, the MTD of CDDP was presumed to be 70 mg m(-2), because 33.3% of patients (2/6) developed DLTs, mainly neutropenia. Therefore, the RD of CDDP was estimated as 60 mg m(-2). In the phase II portion, 19 patients including six patients of the RD phase I portion were evaluated. The median administered courses was four (range: 1-8). The incidences of severe (grades 3-4) haematological and nonhaematological toxicities were 15.8 and 26.3%, respectively, but all were manageable. The RR was 74% (14/19, 95% confidence interval: 54.9-90.6%), and the median survival day was 383. This regimen is considered to be active against AGC with acceptable toxicity.
authors.affiliation: Department of Gastroenterology, School of Medicine, East Hospital, Kitasato University, Kanagawa, Japan. Koizumi@med.kitasato-u.ac.jp
authors.forename: W
authors.initials: W
authors.lastname: Koizumi
authors.forename: S
authors.initials: S
authors.lastname: Tanabe
authors.forename: K
authors.initials: K
authors.lastname: Saigenji
authors.forename: A
authors.initials: A
authors.lastname: Ohtsu
authors.forename: N
authors.initials: N
authors.lastname: Boku
authors.forename: F
authors.initials: F
authors.lastname: Nagashima
authors.forename: K
authors.initials: K
authors.lastname: Shirao
authors.forename: Y
authors.initials: Y
authors.lastname: Matsumura
authors.forename: M
authors.initials: M
authors.lastname: Gotoh
mesh_terms: D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D002945:Cisplatin / Q000008:administration & dosage; D042943:Dihydrouracil Dehydrogenase (NADP) / Q000037:antagonists & inhibitors; D004305:Dose-Response Relationship, Drug; D004338:Drug Combinations; D005260:Female; D006801:Humans; D008297:Male; D020714:Maximum Tolerated Dose; D008875:Middle Aged; D009367:Neoplasm Staging; D010094:Oxonic Acid / Q000008:administration & dosage; D011725:Pyridines / Q000008:administration & dosage; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000473:pathology; D005641:Tegafur / Q000008:administration & dosage; D016896:Treatment Outcome
chemical_list: D004338:Drug Combinations; D011725:Pyridines; C079198:S 1 (combination); D005641:Tegafur; D010094:Oxonic Acid; D042943:Dihydrouracil Dehydrogenase (NADP); D002945:Cisplatin