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Abstract
To evaluate the maximum-tolerated dose (MTD), dose-limiting toxicity (DLT), pharmacokinetics (PK), and adverse effect profile of oxaliplatin in pediatric patients with refractory solid tumors and to determine whether carbamazepine reduces oxaliplatin-induced neurotoxicity.Three regimens of oxaliplatin (given intravenously over 2 hours) were tested: regimen A (100 mg/m2, 130 mg/m2, or 160 mg/m2 every 3 weeks to determine the MTD of oxaliplatin); regimen B (to determine whether carbamazepine starting 24 hours before and ending 48 hours after oxaliplatin reduced the dose-limiting neurotoxicity and increased the MTD of regimen A); and regimen C (to evaluate the safety of a fixed dose two-thirds the MTD of regimen A given every 2 weeks [more frequent administration but comparable dose intensity]).Twenty-six patients were enrolled on regimens A (n = 11), B (n = 6), and C (n = 9). The DLT was grade 3 pharyngolaryngeal dysesthesia, sensory neuropathy, and ataxia at 160 mg/m2. The MTD was 130 mg/m2 every 3 weeks. At the MTD, the median clearance rate of ultrafiltrable platinum was 9.7 L/h/m2 (range, 6.5 to 15.5 L/h/m2). Addition of carbamazepine permitted dose escalation to 160 mg/m2 without DLT. DLT was not observed with a fixed dose of 85 mg/m2 given every 2 weeks. On all regimens, hematologic toxicity was mild. No significant nephrotoxicity, ototoxicity, or cumulative neurologic toxicity was observed.The DLT, MTD, PK, and adverse effect profile of oxaliplatin in pediatric patients with refractory solid tumors are similar to those observed in adults. Carbamazepine may reduce the dose-limiting neurotoxicity of oxaliplatin.
View details for DOI 10.1200/JCO.2006.08.2388
View details for Web of Science ID 000247010400022
View details for PubMedID 17538173