A Phase I Trial of 5-Fluorouracil Given With 776C85 (GW776) and Low-Dose Leucovorin in Adult Patients With Solid Tumors

Summary

This is a dose escalation study. During the first period of this study, an initial pharmacological assessment of fluorouracil administered intravenously along with oral leucovorin calcium is made. Leucovorin calcium is given orally bid on days 1-3. Fluorouracil is given as a 24 hour infusion on day 2. After a 2 week rest period and resolution of any toxicities experienced during the first period of treatment, patients are given an escalating dose of fluorouracil with fixed doses of leucovorin calcium and ethynyluracil. Ethynyluracil and leucovorin calcium are given bid orally on days 1-3 of each week. Fluorouracil is given bid orally on day 2 of each week. Treatment is repeated for three weeks followed by a one week rest period. 3 to 6 patients are enrolled at each dose level. Dose escalation proceeds until the maximum tolerated dose (MTD) is determined. MTD is defined as the dose preceding that at which 2 or more patients experience dose limiting toxicity.

Timeline

Start

1997-06

Primary completion

—

Completion

2001-03

Publications

• Background Evans RM, Laskin JD, Hakala MT. Assessment of growth-limiting events caused by 5-fluorouracil in mouse cells and in human cells. Cancer Res. 1980 Nov;40(11):4113-22. No abstract available.
• Background Spears CP, Shani J, Shahinian AH, Wolf W, Heidelberger C, Danenberg PV. Assay and time course of 5-fluorouracil incorporation into RNA of L1210/0 ascites cells in vivo. Mol Pharmacol. 1985 Feb;27(2):302-7.
• Background Calabro-Jones PM, Byfield JE, Ward JF, Sharp TR. Time-dose relationships for 5-fluorouracil cytotoxicity against human epithelial cancer cells in vitro. Cancer Res. 1982 Nov;42(11):4413-20. No abstract available.

Drugs

Indications