نتایج جستجو برای: leucovorin
تعداد نتایج: 2615 فیلتر نتایج به سال:
An analysis of dose and schedule dependence of calcium leucovorin rescue during high-dose methotrexate therapy of ascitic forms of l1210 leukemia and Sarcoma 180 is reported. Schedules with very delayed "low-dose" leucovorin rescue following lethal doses of methotrexate were highly effective in preventing toxicity and achieved a pronounced antitumor effect in both ascites tumor models. Best res...
UFT and leucovorin (Orzel) is a combination of tegafur and uracil in a molar ratio of 1:4. Tegafur, a prodrug of 5-fluorouracil (5-FU), is converted to 5-FU by the hepatic cytochrome P450 pathway, whereas uracil enhances the half-life of converted 5-FU leading to prolonged exposure and higher intracellular concentration of 5-FU by inhibiting dihydropyrimidine dehydrogenase (DPD), a rate-limitin...
Six patients with relapsed hairy cell leukemia after splenectomy were treated with high-dose methotrexate and leucovorin rescue. Five patients had objective responses as determined by improved blood counts. In two of them, the response has continued for more than 14 and 44 months, respectively. Intensive treatment with high-dose methotrexate and leucovorin rescue was well tolerated and no signi...
An analysis of dose and schedule dependence for calcium leucovorin rescue during high-dose methotrexate therapy of ascitic forms of L1210 leukemia and Sarcoma 180 is reported. Schedules with very delayed "low-dose" leucovorin rescue following lethal doses of methotrexate were highly effective in preventing toxicity and achieved a pronounced antitumor effect in both ascites tumor models. Best re...
The phase I development program of tegafur and uracil (UFT) in the United States has included evaluation of the drug as a single agent and subsequent studies of its biochemical modulation by oral leucovorin. Phase I trials of single-agent UFT examined both a 5-day schedule repeated every 21 days and a 28-day schedule repeated every 35 days. In all of the trials the total dose was divided by thr...
Previous studies from this laboratory have shown that the addition of leucovorin to tumor cells dissociates methotrexate, but not methotrexate polyglutamates, from dihydrofolate reduc Ã-ase(L. H. Matherly, D. W. Fry, and I. D. Goldman, Cancer Res., 43: 2694-2699, 1983). To further assess the importance of these interactions to leucovorin rescue, antifolate growth inhibi tion toward L1210 cells ...
PURPOSE To evaluate the safety profile of capecitabine using data from a large, well-characterized population of patients with metastatic colorectal cancer treated in two phase II studies. In these trials, capecitabine achieved significantly superior response rates, equivalent time to disease progression and equivalent survival compared with 5-fluorouracil (5-FU)/leucovorin. PATIENTS AND METH...
Postoperative combined-modality therapy with fluorouracil (5-FU) and radiation therapy is accepted practice for high-risk rectal cancer. Postoperative pelvic radiotherapy alone may improve pelvic control, but is not associated with an improvement in survival. Protracted infusional 5-FU has been associated with decreased tumor recurrence and improved survival when combined with postoperative adj...
Capecitabine (Xeloda) and irinotecan (CPT-11, Camptosar) both have demonstrated single-agent activity in patients with colorectal cancer. In an analysis of pooled results of two phase III studies, capecitabine provided advantages over intravenous fluorouracil (5-FU) plus leucovorin in patients with metastatic colorectal cancer. In another analysis, metastatic colorectal cancer patients who rece...
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