Protocol Number: 06-C-0221 ![]()
-5-Fluoro-2'-Deocyctidine (FdCyd) and 5-Fluorouracil (FUra) both belong to a class of anti-cancer drugs called fluoropyrimidines. -FUra is the most widely used agent in this class of drugs. -The properties and activity of FdCyd, used together with the experimental drug tetrahydrouridine (THU), may make it a more effective cancer treatment than FUra alone. Objectives: -To determine how much FdCyd can be given safely with a fixed dose of THU. -To determine the side effects of FdCyd administered together with THU. -To examine how the body handles FdCyd. Eligibility: -Patients 18 years of age and older whose cancer either has progressed after receiving standard treatment or for whom no standard treatment is available. Design: -Patients receive FdCyd and THU infusions in 4-week treatment cycles. The drugs are given together through a vein for 3 hours each day for 5 days, 2 weeks in a row, followed by a 2-week rest. Treatment continues unless: 1) the side effects are unacceptable, 2) the tumor grows, 3) the tumor has not shrunk by one-half its size after two treatment cycles, or 4) there is no longer evidence of cancer after two cycles of treatment. -To determine the optimum dose of FdCyd, the dose is increased in subsequent small groups of patients entering the study until the highest tolerated dose is found. -Patients are evaluated periodically with physical examinations, blood and urine tests, X-rays and other imaging studies, electrocardiograms, tumor measurements and tumor biopsies (surgical removal of a small piece of tumor tissue). -The study will accrue a maximum of 80 patients at all centers (18 at the NCI).
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