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Phase I study of twice-weekly gemcitabine and concurrent thoracic radiation for patients with locally advanced non–small-cell lung cancer |
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| Authors: | A William Blackstock MD Glenn J Lesser MD June Fletcher-Steede BA L Douglas Case PhD Robert W Tucker MD Suzanne M Russo MD Douglas R White MD Antonius Miller MD |
| Institution: | a Wake Forest University Baptist Medical Center, Winston-Salem, NC, USA |
| Abstract: | Purpose: To determine the maximum tolerated dose (MTD) and dose-limiting toxicity of twice-weekly gemcitabine and concurrent thoracic radiation in patients with Stage IIIa/IIIb non–small-cell lung cancer (NSCLC). Methods and Materials: Seventeen patients with histologically confirmed Stage IIIa and IIIb NSCLC were studied. Gemcitabine was administered via a 30-min i.v. infusion twice weekly for 6 weeks concurrent with 60 Gy of thoracic radiation. Gemcitabine, starting at a twice-weekly dose of 10 mg/m2 (20 mg/m2/week), was escalated in 10–15 mg/m2 increments in successive cohorts of 3 to 6 patients until dose-limiting toxicity was observed. Results: Of the 17 patients entered, 16 were evaluable for toxicity. The dose-limiting toxicity at 50 mg/m2 given twice weekly (100 mg/m2/week) was Grade 3 pneumonitis observed in 1 patient, Grade 3 pulmonary fibrosis in a second patient, and Grade 4 esophagitis observed in two additional patients. Twice-weekly gemcitabine at a dose of 35 mg/m2 was determined to be the MTD. The overall response rate for the 16 evaluable patients was 88%. The median survival for the entire group is 16.0 months. Conclusions: The MTD of twice-weekly gemcitabine is 35 mg/m2 (70 mg/m2/week) given with thoracic radiation. A Phase II study within the Cancer and Leukemia Group B to ascertain the potential efficacy of this treatment regimen is in development. |
| Keywords: | Chemoradiation Sensitization Thoracic |
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