Abstract | BACKGROUND: Both irinotecan (CPT-11) and S-1 are active against colorectal cancer; however, as S-1 is a prodrug of 5-fluorouracil (5-FU), 5-FU and its metabolites might inhibit the antitumour effect of CPT-11. Therefore, we designed a sequential combination, in which CPT-11 infusion was given on day 1 and S-1 was given orally at 80 mg m(-2) per day on days 3-16 every 3 weeks. METHODS: Twelve patients entered the phase I study, and the recommended doses were determined as a CPT-11 dose of 150 mg m(-2) and an S-1 dose of 80 mg m(-2). RESULTS: In all, 36 patients entered the phase II study, of whom 4 and 16 had complete and partial responses. The overall response rate was 55.6% (95% confidence interval, 38.1-72.1%), and median progression-free survival was 7.7 months (95% confidence interval, 4.8-12.6 months). Grade 3 neutropenia was the most common haematological toxicity and occurred in 6.5% of 215 treatment courses. Grade 3 non-haematological toxicities included anorexia (1.4%) and diarrhoea (0.9%). There was no grade 4 toxicity of any kind. CONCLUSION: Our results suggest that this regimen is convenient, safe and promising, compared with conventional regimens for patients with metastatic colorectal cancer.
|
Authors | T Yoshioka, S Kato, M Gamoh, N Chiba, T Suzuki, N Sakayori, S Kato, H Shibata, H Shimodaira, K Otsuka, Y Kakudo, S Takahashi, C Ishioka |
Journal | British journal of cancer
(Br J Cancer)
Vol. 101
Issue 12
Pg. 1972-7
(Dec 15 2009)
ISSN: 1532-1827 [Electronic] England |
PMID | 19920821
(Publication Type: Clinical Trial, Phase I, Clinical Trial, Phase II, Journal Article)
|
Chemical References |
- Drug Combinations
- S 1 (combination)
- Tegafur
- Oxonic Acid
- Irinotecan
- Camptothecin
|
Topics |
- Adult
- Aged
- Antineoplastic Combined Chemotherapy Protocols
(therapeutic use)
- Camptothecin
(administration & dosage, adverse effects, analogs & derivatives)
- Colorectal Neoplasms
(drug therapy)
- Drug Combinations
- Female
- Humans
- Irinotecan
- Male
- Maximum Tolerated Dose
- Middle Aged
- Oxonic Acid
(administration & dosage, adverse effects)
- Tegafur
(administration & dosage, adverse effects)
|