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A phase I study of MN-029 (denibulin), a novel vascular-disrupting agent, in patients with advanced solid tumors.

Abstract：

PURPOSE:MN-029 (denibulin HCl) is a novel vascular-disrupting agent that reversibly inhibits microtubule assembly, resulting in disruption of the cytoskeleton of tumor vascular endothelial cells. This study determined the safety, pharmacokinetics, and acute anti-vascular effects of MN-029. METHODS:Patients were treated with escalating doses of MN-029 (4.0-225 mg/m(2)) administered IV at 3-week intervals. This first-in-human study followed an accelerated titration design, with intra-patient dose escalation. Plasma samples were assayed to determine PK parameters. DCE-MRI scans were acquired at baseline and at 6-8 h post-dose. RESULTS:Thirty-four patients received 151 infusions of MN-029. The most common toxicities of MN-029 included nausea and vomiting (which appeared to be dose related), diarrhea, fatigue, headache, and anorexia. No clinically significant myelotoxicity, stomatitis or alopecia was observed. There was no evidence of cumulative toxicity in patients receiving multiple courses of therapy. The cohort at 180 mg/m(2) was expanded to six patients due to a reversible episode of acute coronary ischemia, without sequelae and with preservation of myocardial function. Two dose-limiting toxicities occurred at 225 mg/m(2), a transient ischemic attack and grade 3 transaminitis, thus ending dose escalation. Pharmacokinetic data indicated dose-related increases in C (max) and AUC values, although substantial inter-subject variability was observed. No objective responses were noted; however, five patients had stable disease ≥6 months. A significant linear correlation was found between reduction in K (trans) and exposure to MN-029. CONCLUSIONS:MN-029 was generally well tolerated and showed decrease in tumor vascular parameters. The maximum tolerated dose was 180 mg/m(2).

journal_name

Cancer Chemother Pharmacol

journal_title

Cancer chemotherapy and pharmacology

authors

Ricart AD,Ashton EA,Cooney MM,Sarantopoulos J,Brell JM,Feldman MA,Ruby KE,Matsuda K,Munsey MS,Medina G,Zambito A,Tolcher AW,Remick SC

doi

10.1007/s00280-011-1565-4

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

959-70

issue

eissn

0344-5704

issn

1432-0843

journal_volume

pub_type

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A phase I study of MN-029 (denibulin), a novel vascular-disrupting agent, in patients with advanced solid tumors.