Phase i pharmacokinetic and pharmacodynamic study of cetuximab, irinotecan and sorafenib in advanced colorectal cancer Academic Article uri icon

Overview

MeSH Major

  • Antineoplastic Combined Chemotherapy Protocols
  • Colorectal Neoplasms

abstract

  • Background This phase Ib study was designed to determine the maximum tolerated doses (MTD) and dose limiting toxicities (DLTs) of irinotecan and cetuximab with sorafenib. Secondary objectives included characterizing the pharmacokinetics and pharmacodynamics and evaluating preliminary antitumor activity in patients with advanced colorectal cancer (CRC). Methods Patients with metastatic, pretreated CRC were treated at five dose levels. Results Eighteen patients were recruited with median age 56.5 years. In the first five patients treated, 2 irinotecan related DLTs were observed. With reduced dose intensity irinotecan, there were no further DLTs. The most common toxicities were diarrhea, nausea/vomiting, fatigue, anorexia and rash. DLTs included neutropenia and thrombocytopenia. Two patients had partial responses (one with a KRAS mutation) and 8 had stable disease (8-36 weeks). The median progression free survival (PFS) and overall survival (OS) were 2.5 and 4.7 months respectively. Pharmacokinetic analyses suggest sorafenib and metabolite exposure correlate with OS and DLTs. Conclusions The recommended phase II dose (RP2D) is irinotecan 100 mg/m(2) i.v. days 1, 8; cetuximab 400 mg/m(2) i.v. days 1 and 250 mg/m(2) i.v. weekly; and sorafenib 400 mg orally twice daily in advanced, pretreated CRC. The combination resulted in a modest response rate.

publication date

  • April 2013

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC3674958

Digital Object Identifier (DOI)

  • 10.1007/s10637-012-9820-z

PubMed ID

  • 22615057

Additional Document Info

start page

  • 345

end page

  • 54

volume

  • 31

number

  • 2