Intrapatient cetuximab dose escalation in metastatic colorectal cancer according to the grade of early skin reactions: The randomized EVEREST study

Eric Van Cutsem, Sabine Tejpar, Dirk Vanbeckevoort, Marc Peeters, Yves Humblet, Hans Gelderblom, Jan B. Vermorken, Frederic Viret, Bengt Glimelius, Elisa Gallerani, Alain Hendlisz, Annemieke Cats, Markus Moehler, Xavier Sagaert, Soetkin Vlassak, Michael Schlichting, Fortunato Ciardiello

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Skin toxicity in patients receiving cetuximab has been associated positively with clinical outcome in several tumor types. This study investigated the effect of cetuximab dose escalation in patients with irinotecan-refractory metastatic colorectal cancer who had developed no or mild skin reactions after 21 days of treatment at the standard dose. This article reports clinical and pharmacokinetic (PK) data. Patients and Methods: After 21 days of standard-dose cetuximab (400 mg/m2 initial dose, then 250 mg/m2 per week) plus irinotecan, patients with ≤ grade 1 skin reactions were randomly assigned to standard-dose (group A) or dose-escalated (to 500 mg/m2 per week; group B) cetuximab. Patients with ≥ grade 2 skin reactions continued on standard-dose cetuximab plus irinotecan (group C). Results: The intent-to-treat population comprised 157 patients. PK profiles reflected the dose increase and were predictable across the dose range investigated. Weekly cetuximab doses of up to 500 mg/m2 were well tolerated, and grade 3 and 4 adverse events were generally comparable between treatment groups. Dose escalation (n = 44) was associated with an increase in skin reactions ≥ grade 2 compared with standard (n = 45) dosing (59% v 38%, respectively). Dose escalation, compared with standard dosing, showed some evidence for improved response rate (30% v 16%, respectively) and disease control rate (70% v 58%, respectively) but no indication of benefit in relation to overall survival. In an exploratory analysis, dose escalation seemed to increase response rate compared with standard dosing in patients with KRAS wild-type but not KRAS mutant tumors. Conclusion: Cetuximab serum concentrations increased predictably with dose. Higher dose levels were well tolerated. The possible indication for improved efficacy in the dose-escalation group warrants further investigation.

Original languageEnglish
Pages (from-to)2861-2868
Number of pages8
JournalJournal of Clinical Oncology
Volume30
Issue number23
DOIs
Publication statusPublished - 2012

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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