Annals of Oncology 13:1819-1825, 2002
© 2002 European Society for Medical Oncology
Original Paper |
Phase I study of rubitecan and gemcitabine in patients with advanced malignancies
Alvin J. Siteman Cancer Center, Departments of Medicine and Obstetrics and Gynecology, Washington University School of Medicine, St Louis, MO; and SuperGen, Inc., Dublin, CA, USA
Received 23 May 2002; revised 10 July 2002; accepted 9 August 2002
Background:
Rubitecan (9-nitrocamptothecin, 9-NC, OrathecinTM) and gemcitabine have single-agent activity in pancreatic and ovarian carcinoma. We conducted a phase I trial to evaluate the maximum tolerated dose (MTD) and toxicities of this combination in advanced malignancies.
Patients and methods:
Twenty-one patients with refractory or recurrent malignancies were enrolled in this dose escalation trial. Dose escalation proceeded from a starting level of rubitecan at 0.75 mg/m2/day administered orally on days 15 and 812 in combination with gemcitabine 1000 mg/m2 administered intravenously on days 1 and 8 of a 21-day cycle.
Results:
The MTD was defined as rubitecan 1 mg/m2 administered orally days 15 and 812, and gemcitabine 1000 mg/m2 administered intravenously over 30 min days 1 and 8, given every 21 days. Dose-limiting toxicity was myelosuppression including neutropenia and thrombocytopenia. Other side effects included diarrhea, nausea, vomiting and fatigue. Five patients with stable disease were observed among 18 evaluable patients.
Conclusions:
The recommended phase II dose is rubitecan 1 mg/m2 given orally on days 15 and 812 in combination with gemcitabine 1000 mg/m2 as a 30-min intravenous infusion on days 1 and 8 of a 21-day cycle.
Key words: gemcitabine, Gemzar®, 9-nitrocamptothecin, OrathecinTM, phase I, rubitecan
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