Clinical phase I study with one-hour paclitaxel infusion

Annals of Oncology : Official Journal of the European Society for Medical Oncology
K MrossH Maier-Lenz

Abstract

Paclitaxel (PAC) is one of the major anti-cancer drugs, effective in different tumors. Studies with 24-hour infusion with 135 mg/m2 and a three-hour infusion with 175 mg/m2 showed a significant schedule-dependent toxicity. We evaluated a one-hour infusion schedule within a phase I study to determine the dose limiting toxicity (DLT), the maximum tolerated dose (MTD), and the anti-cancer efficacy. Patients with advanced malignant tumors were treated within cohorts by one-hour infusional paclitaxel starting with 150 mg/m2 and stepwise escalation with 25 mg/m2 increments. Therapy was repeated in three-week intervals. Cycles were repeated until progression. Toxicity was closely monitored, anti-cancer efficacy was only evaluated in those patients who received at minimum two treatment cycles. Thirty-four patients entered the study (11 NSCLC, five SCLC, seven ovarian cancer, one cervix cancer, nine MBC, one HN cancer). The MTD was PAC 250 mg/m2. The DLT was central and peripheral neuropathy (WHO grade 3). Other significant toxicities were fatigue, myalgia/arthralgia and paraesthesia. No significant myelotoxicity was observed. Totally twentyone patients were evaluable for response. A partial response was observed in five (24%) patients ...Continue Reading

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