Phase I Trial of Gemcitabine in Patients with Advanced Pancreatic Cancer

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Abstract
Background: Gemcitabine is the most promising new agent currently being tested in pancreatic cancer. The present study was conducted to confirm the tolerability of a weekly schedule of gemcitabine at a dose of 1000 mg/m2 in Japanese patients with advanced pancreatic cancer. Methods: The primary end-point was to evaluate the frequency of dose-limiting toxicity. Gemcitabine 1000 mg/m2 was administered over 30 min weekly in two schedules: gemcitabine ×3 every 4 weeks (Schedule 1) and gemcitabine ×7 followed by a week of rest and then gemcitabine ×3 every 4 weeks thereafter (Schedule 2). At least three patients entered each schedule and three additional patients were treated in the presence of dose-limiting toxicity. Results: Eleven chemo-naive patients with a good Karnofsky performance status of ≥80 points and distant metastasis were entered into this trial. In Schedule 1, no dose-limiting toxicity was observed in the three patients. In Schedule 2, the evaluation of dose-limiting toxicity was complete in six of the eight enrolled patients and two patients showed dose-limiting toxicity in this Schedule; one patient experienced both grade 4 leukocytopenia and grade 4 neutropenia, and both grade 4 neutropenia and grade 3 GOT/GPT increased in another patient. Two patients (18%) showed a partial response and a clinical benefit response was also achieved in two (29%) of the seven evaluable patients. Conclusion: Gemcitabine 1000 mg/m2 weekly ×7 followed by a week of rest and weekly ×3 every 4 weeks thereafter may be tolerated in Japanese patients with advanced pancreatic cancer.

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