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• W2025898541 abstract "Purpose We report the toxicity profile and pharmacokinetic data of a schedule-dependent chemoradiation regimen using pulsed low-dose paclitaxel for radiosensitization in a Phase I study for inoperable non–small-cell lung cancer. Methods and Materials Paclitaxel at escalating doses of 15 mg/m2, 20 mg/m2, and 25 mg/m2 were infused on Monday, Wednesday, and Friday with daily chest radiation in cohorts of 6 patients. Daily radiation was delayed for maximal G2/M arrest and apoptotic effect, an observation from preclinical investigations. Plasma paclitaxel concentration was determined by high-performance liquid chromatography. Results Dose-limiting toxicities included 3 of 18 patients with Grade 3 pneumonitis and 3 of 18 patients with Grade 3 esophagitis. There was no Grade 4 or 5 pneumonitis or esophagitis. There was also no Grade 3 or 4 neutropenia, thrombocytopenia, anemia or neuropathy. For Dose Levels I (15 mg/m2), II (20 mg/m2), and III (25 mg/m2), the mean peak plasma level was 0.23 ± 0.06 μmol/l, 0.32 ± 0.05 μmol/l, and 0.52 ± 0.14 μmol/l, respectively; AUC was 0.44 ± 0.09 μmol/l, 0.61 ± 0.1 μmol/l, and 0.96 ± 0.23 μmol/l, respectively; and duration of drug concentration >0.05 μmol/l (t > 0.05 μmol/l) was 1.6 ± 0.3 h, 1.9 ± 0.2 h, and 3.0 ± 0.9 h, respectively. Conclusion Pulsed low-dose paclitaxel chemoradiation is associated with low toxicity. Pharmacokinetic data showed that plasma paclitaxel concentration >0.05 μmol/l for a minimum of 1.6 h was sufficient for effective radiosensitization. We report the toxicity profile and pharmacokinetic data of a schedule-dependent chemoradiation regimen using pulsed low-dose paclitaxel for radiosensitization in a Phase I study for inoperable non–small-cell lung cancer. Paclitaxel at escalating doses of 15 mg/m2, 20 mg/m2, and 25 mg/m2 were infused on Monday, Wednesday, and Friday with daily chest radiation in cohorts of 6 patients. Daily radiation was delayed for maximal G2/M arrest and apoptotic effect, an observation from preclinical investigations. Plasma paclitaxel concentration was determined by high-performance liquid chromatography. Dose-limiting toxicities included 3 of 18 patients with Grade 3 pneumonitis and 3 of 18 patients with Grade 3 esophagitis. There was no Grade 4 or 5 pneumonitis or esophagitis. There was also no Grade 3 or 4 neutropenia, thrombocytopenia, anemia or neuropathy. For Dose Levels I (15 mg/m2), II (20 mg/m2), and III (25 mg/m2), the mean peak plasma level was 0.23 ± 0.06 μmol/l, 0.32 ± 0.05 μmol/l, and 0.52 ± 0.14 μmol/l, respectively; AUC was 0.44 ± 0.09 μmol/l, 0.61 ± 0.1 μmol/l, and 0.96 ± 0.23 μmol/l, respectively; and duration of drug concentration >0.05 μmol/l (t > 0.05 μmol/l) was 1.6 ± 0.3 h, 1.9 ± 0.2 h, and 3.0 ± 0.9 h, respectively. Pulsed low-dose paclitaxel chemoradiation is associated with low toxicity. Pharmacokinetic data showed that plasma paclitaxel concentration >0.05 μmol/l for a minimum of 1.6 h was sufficient for effective radiosensitization." @default.
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• W2025898541 title "Toxicity Profile and Pharmacokinetic Study of A Phase I Low-Dose Schedule–Dependent Radiosensitizing Paclitaxel Chemoradiation Regimen for Inoperable Non–Small-Cell Lung Cancer" @default.
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• W2025898541 doi "https://doi.org/10.1016/j.ijrobp.2007.10.011" @default.
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