PURPOSE: Use of the fourth-generation oral fluoropyrimidine S-1 together with gemcitabine has shown striking anticancer effects. In this single-arm phase I trial of preoperative combination therapy using gemcitabine and S-1 concurrently with radiotherapy, we verified the safety and feasibility and determined the maximum-tolerated dose of each drug in patients with resectable pancreatic cancer. METHODS: A standard 3+3 dose escalation scheme was used. Patients with cytologically or histologically proven resectable pancreatic ductal adenocarcinoma were administered 30-min intravenous gemcitabine infusions on days 1, 8, 22, and 29 and S-1 orally on days 1-5, 8-12, 22-26, and 29-33. A total radiation dose of 50.4 Gy (1.8 Gy/day, 5 times per week, 28 fractions) was concurrently delivered. Surgical exploration was scheduled 4-7 weeks after the final radiation fraction. RESULTS: Twenty-one patients were enrolled. No treatment-related deaths occurred during this study. Recommended doses were determined to be 80 mg/m(2) of S-1 daily and 1,000 mg/m(2) of gemcitabine. CA19-9 was reduced to <50 % of baseline values in 12 (75 %) of 16 measurable patients. Nineteen of 21 enrolled patients successfully underwent surgical resection. CONCLUSIONS: Preoperative chemoradiotherapy consisting of gemcitabine and S-1 concurrent with full-dose radiation is feasible and well tolerated.
PURPOSE: Use of the fourth-generation oral fluoropyrimidineS-1 together with gemcitabine has shown striking anticancer effects. In this single-arm phase I trial of preoperative combination therapy using gemcitabine and S-1 concurrently with radiotherapy, we verified the safety and feasibility and determined the maximum-tolerated dose of each drug in patients with resectable pancreatic cancer. METHODS: A standard 3+3 dose escalation scheme was used. Patients with cytologically or histologically proven resectable pancreatic ductal adenocarcinoma were administered 30-min intravenous gemcitabine infusions on days 1, 8, 22, and 29 and S-1 orally on days 1-5, 8-12, 22-26, and 29-33. A total radiation dose of 50.4 Gy (1.8 Gy/day, 5 times per week, 28 fractions) was concurrently delivered. Surgical exploration was scheduled 4-7 weeks after the final radiation fraction. RESULTS: Twenty-one patients were enrolled. No treatment-related deaths occurred during this study. Recommended doses were determined to be 80 mg/m(2) of S-1 daily and 1,000 mg/m(2) of gemcitabine. CA19-9 was reduced to <50 % of baseline values in 12 (75 %) of 16 measurable patients. Nineteen of 21 enrolled patients successfully underwent surgical resection. CONCLUSIONS: Preoperative chemoradiotherapy consisting of gemcitabine and S-1 concurrent with full-dose radiation is feasible and well tolerated.
Authors: Mashaal Dhir; Gautam K Malhotra; Davendra P S Sohal; Nicholas A Hein; Lynette M Smith; Eileen M O'Reilly; Nathan Bahary; Chandrakanth Are Journal: World J Surg Oncol Date: 2017-10-10 Impact factor: 2.754