PURPOSE: The rationale for developing an alternative paclitaxel formulation concerns Cremophor EL-related side effects, and a novel paclitaxel delivery system might augment its therapeutic efficacy. Genexol-PM is a polymeric micelle formulated paclitaxel free of Cremophor EL. A phase I study was performed to determine the maximum tolerated dosage, dose-limiting toxicities, and the pharmacokinetic profile of Genexol-PM in patients with advanced, refractory malignancies. EXPERIMENTAL DESIGN: Twenty-one patients were entered into the study. Genexol-PM was i.v. administered over 3 h every 3 weeks without premedication. The Genexol-PM dose was escalated from 135 mg/m(2) to 390 mg/m(2). RESULTS: All of the patients were evaluable for toxicity and response. Acute hypersensitivity reactions were not observed. Neuropathy and myalgia were the most common toxicities. During cycle 1, grade 3 myalgia occurred in 1 patient at 230 and 300 mg/m(2), respectively. At 390 mg/m(2), 2 of 3 patients developed grade 4 neutropenia or grade 3 polyneuropathy. Therefore, the maximum tolerated dosage was determined to be 390 mg/m(2). There were 3 partial responses (14%) among the 21 patients. Of the 3 responders, 2 were refractory to prior taxane therapy. The paclitaxel area under the curve from time 0 to infinity and peak or maximum paclitaxel concentration seemed to increase with escalating dose, except at 230 mg/m(2), which suggests that Genexol-PM has linear pharmacokinetics. CONCLUSION: The main dose-limiting toxicities were neuropathy, myalgia, and neutropenia, and the recommended dosage for a phase II study is 300 mg/m(2). Genexol-PM is believed to be superior to conventional paclitaxel in terms of the obviation of premedication and the delivery of higher paclitaxel doses without additional toxicity.
PURPOSE: The rationale for developing an alternative paclitaxel formulation concerns Cremophor EL-related side effects, and a novel paclitaxel delivery system might augment its therapeutic efficacy. Genexol-PM is a polymeric micelle formulated paclitaxel free of Cremophor EL. A phase I study was performed to determine the maximum tolerated dosage, dose-limiting toxicities, and the pharmacokinetic profile of Genexol-PM in patients with advanced, refractory malignancies. EXPERIMENTAL DESIGN: Twenty-one patients were entered into the study. Genexol-PM was i.v. administered over 3 h every 3 weeks without premedication. The Genexol-PM dose was escalated from 135 mg/m(2) to 390 mg/m(2). RESULTS: All of the patients were evaluable for toxicity and response. Acute hypersensitivity reactions were not observed. Neuropathy and myalgia were the most common toxicities. During cycle 1, grade 3 myalgia occurred in 1 patient at 230 and 300 mg/m(2), respectively. At 390 mg/m(2), 2 of 3 patients developed grade 4 neutropenia or grade 3 polyneuropathy. Therefore, the maximum tolerated dosage was determined to be 390 mg/m(2). There were 3 partial responses (14%) among the 21 patients. Of the 3 responders, 2 were refractory to prior taxane therapy. The paclitaxel area under the curve from time 0 to infinity and peak or maximum paclitaxel concentration seemed to increase with escalating dose, except at 230 mg/m(2), which suggests that Genexol-PM has linear pharmacokinetics. CONCLUSION: The main dose-limiting toxicities were neuropathy, myalgia, and neutropenia, and the recommended dosage for a phase II study is 300 mg/m(2). Genexol-PM is believed to be superior to conventional paclitaxel in terms of the obviation of premedication and the delivery of higher paclitaxel doses without additional toxicity.
Authors: Warefta Hasan; Kevin Chu; Anuradha Gullapalli; Stuart S Dunn; Elizabeth M Enlow; J Christopher Luft; Shaomin Tian; Mary E Napier; Patrick D Pohlhaus; Jason P Rolland; Joseph M DeSimone Journal: Nano Lett Date: 2011-12-21 Impact factor: 11.189
Authors: Nazila Kamaly; Zeyu Xiao; Pedro M Valencia; Aleksandar F Radovic-Moreno; Omid C Farokhzad Journal: Chem Soc Rev Date: 2012-03-05 Impact factor: 54.564
Authors: Jing Tian; Yuanzeng Min; Zachary Rodgers; Kin Man Au; C Tilden Hagan; Maofan Zhang; Kyle Roche; Feifei Yang; Kyle Wagner; Andrew Z Wang Journal: J Mater Chem B Date: 2017-07-05 Impact factor: 6.331