27 August 2003
A phase I and pharmacologic study of the combination of marimastat and paclitaxel in patients with advanced malignancy
Deborah L. Toppmeyer, Murugesan Gounder, Judie Much, Rita Musanti, Viral Vyas, Melissa Medina, Tammy Orlando, Michael Pennick, Yong Lin, Weichung Shih, Susan Goodin, Eric H. RubinMed Sci Monit 2003; 9(8): PI99-104 :: ID: 13110
Abstract
Background:Marimastat is a potent inhibitor of matrix metalloproteinases and in preclinical studies enhances the anti-tumor activity of certain chemotherapeutics. We performed a phase I clinical evaluation of the combination of oral marimastat and intravenous paclitaxel, to determine if these drugs could be co-administered safely, and to determine whether marimastat alters paclitaxel pharmacokinetics.Material/Methods:Marimastat was administered twice daily and paclitaxel as a three hour infusion every three weeks. Doses of both marimastat and paclitaxel were escalated in cohorts of patients up to maximal doses of 10 mg for marimastat and 175 mg/m2 for paclitaxel. Paclitaxel plasma pharmacokinetic parameters were assessed in the absence (cycle 1) and presence (cycle 2) of marimastat. Trough marimastat plasma levels were evaluated during cycle 2.Results:A total of 19 patients were treated at three different dose levels. There were no dose-limiting toxicities during the first cycle of therapy, resulting in dose escalation up to the planned maximal dose for each drug. Neutropenia was the most common significant toxicity at the highest dose level, with grade 3 or higher neutropenia occurring in 38% of patients. There were no complete or partial responses. Pharmacokinetic analyses indicate that marimastat does not alter paclitaxel clearance. At the 10 mg dose, the mean trough marimastat level was 14.8 Kg/L.Conclusions:Marimastat and paclitaxel can be co-administered safely at doses equivalent to those recommended for single-agent administration. Additional studies are necessary to determine whether this combination is more effective in controlling tumor progression than paclitaxel alone.
Keywords: Antineoplastic Agents, Phytogenic - chemistry, Antineoplastic Agents, Phytogenic - pharmacokinetics, Antineoplastic Agents, Phytogenic - therapeutic use, Antineoplastic Combined Chemotherapy Protocols, Dose-Response Relationship, Drug, Enzyme Inhibitors - chemistry, Enzyme Inhibitors - pharmacokinetics, Enzyme Inhibitors - therapeutic use, Hydroxamic Acids - chemistry, Hydroxamic Acids - pharmacokinetics, Hydroxamic Acids - therapeutic use, Molecular Structure, Neoplasms - drug therapy, Paclitaxel - chemistry, Paclitaxel - pharmacokinetics, Paclitaxel - therapeutic use
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