Clinical evaluation of ZD6474, an orally active inhibitor of VEGF and EGF receptor signaling, in patients with solid, malignant tumors.

Journal Article (Journal Article;Multicenter Study)

BACKGROUND: ZD6474 selectively inhibits the tyrosine kinase activity of vascular endothelial growth factor receptor and epidermal growth factor receptor. The safety, tolerability and pharmacokinetics of ZD6474 were assessed in a phase I dose-escalation study of patients with advanced solid tumors. PATIENTS AND METHODS: Adult patients with tumors refractory to standard treatments received once-daily oral ZD6474 (50-600 mg) in 28-day cycles, until disease progression or unacceptable toxicity was observed. RESULTS: Seventy-seven patients were treated at doses of 50 mg (n=9), 100 mg (n=19), 200 mg (n=8), 300 mg (n=25), 500 mg (n=8), and 600 mg (n=8). Adverse events were generally mild, and the most common dose-limiting toxicities (DLT) were diarrhea (n=4), hypertension (n=4), and rash (n=3). The incidence of most adverse events appeared to be dose-dependant. In the 500 mg/day cohort, 3/8 patients experienced DLT and this dose was therefore considered to exceed the maximum tolerated dose. Pharmacokinetic analysis confirmed that ZD6474 was suitable for once-daily oral dosing. CONCLUSIONS: Once-daily oral dosing of ZD6474 at 300 mg/day is generally well tolerated in patients with advanced solid tumors, and this dose is being investigated in phase II trials.

Full Text

Duke Authors

Cited Authors

  • Holden, SN; Eckhardt, SG; Basser, R; de Boer, R; Rischin, D; Green, M; Rosenthal, MA; Wheeler, C; Barge, A; Hurwitz, HI

Published Date

  • August 2005

Published In

Volume / Issue

  • 16 / 8

Start / End Page

  • 1391 - 1397

PubMed ID

  • 15905307

International Standard Serial Number (ISSN)

  • 0923-7534

Digital Object Identifier (DOI)

  • 10.1093/annonc/mdi247


  • eng

Conference Location

  • England