A phase I dose escalation study of a pharmacobiologically based scheduling of capecitabine and mitomycin C in patients with gastrointestinal malignancies.Cancer Chemotherapy and Pharmacology (2010)
Mitomycin C (MMC) produces significant upregulation of thymidine phosphorylase, a principal determinant of the therapeutic index of capecitabine-based treatment, starting 4-6 days after treatment. On the basis of the time-dependency of this upregulation, we performed a phase I dose escalation study of capecitabine and MMC in patients with gastrointestinal malignancies.
A total of 29 patients with advanced gastrointestinal malignancies received MMC at 6 mg/m2 on day 1 and capecitabine escalated in four successive patient cohorts of doses 500-1,000 mg/m2/day twice daily on days 8-21, every 28 days. MMC was capped at 36 mg/m2.
A total of 29 patients were enrolled and 90% had at least one prior treatment in the metastatic setting. There was one DLT, grade 3 hand and foot syndrome, at dose level four. The most common toxicity was fatigue (61%). No patients experienced grade 4 toxicities. Nine patients experienced prolonged stability of disease.
Capecitabine in combination with MMC in the proposed schedule is well-tolerated with evidence of preliminary activity. The recommended dose for phase II studies are MMC at 6 mg/m2 on day 1 of a 28-day cycle with the dose capped at 36 mg/m2, in combination with capecitabine at 1,000 mg/m2 twice daily on days 8-21.
Publication DateApril, 2010
Citation InformationMiguel A. Villalona Calero. "A phase I dose escalation study of a pharmacobiologically based scheduling of capecitabine and mitomycin C in patients with gastrointestinal malignancies." Cancer Chemotherapy and Pharmacology Vol. 65 Iss. 5 (2010) p. 863 - 869
Available at: http://works.bepress.com/miguel-villalonacalero/55/