Phase II study of gemcitabine, oxaliplatin in combination with panitumumab in KRAS wild-type unresectable or metastatic biliary tract and gallbladder cancer

Br J Cancer. 2014 Jul 29;111(3):430-6. doi: 10.1038/bjc.2014.343. Epub 2014 Jun 24.

Abstract

Background: Current data suggest that platinum-based combination therapy is the standard first-line treatment for biliary tract cancer. EGFR inhibition has proven beneficial across a number of gastrointestinal malignancies; and has shown specific advantages among KRAS wild-type genetic subtypes of colon cancer. We report the combination of panitumumab with gemcitabine (GEM) and oxaliplatin (OX) as first-line therapy for KRAS wild-type biliary tract cancer.

Methods: Patients with histologically confirmed, previously untreated, unresectable or metastatic KRAS wild-type biliary tract or gallbladder adenocarcinoma with ECOG performance status 0-2 were treated with panitumumab 6 mg kg(-1), GEM 1000 mg m(-2) (10 mg m(-2) min(-1)) and OX 85 mg m(-2) on days 1 and 15 of each 28-day cycle. The primary objective was to determine the objective response rate by RECIST criteria v.1.1. Secondary objectives were to evaluate toxicity, progression-free survival (PFS), and overall survival.

Results: Thirty-one patients received at least one cycle of treatment across three institutions, 28 had measurable disease. Response rate was 45% and disease control rate was 90%. Median PFS was 10.6 months (95% CI 5-24 months) and median overall survival 20.3 months (95% CI 9-25 months). The most common grade 3/4 adverse events were anaemia 26%, leukopenia 23%, fatigue 23%, neuropathy 16% and rash 10%.

Conclusions: The combination of gemcitabine, oxaliplatin and panitumumab in KRAS wild type metastatic biliary tract cancer showed encouraging efficacy, additional efforts of genetic stratification and targeted therapy is warranted in biliary tract cancer.

Publication types

  • Clinical Trial, Phase II
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenocarcinoma / drug therapy*
  • Adenocarcinoma / mortality
  • Adenocarcinoma / secondary
  • Adult
  • Aged
  • Antibodies, Monoclonal / administration & dosage
  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use*
  • Biliary Tract Neoplasms / drug therapy*
  • Biliary Tract Neoplasms / mortality
  • Biliary Tract Neoplasms / pathology
  • Deoxycytidine / administration & dosage
  • Deoxycytidine / analogs & derivatives
  • Disease-Free Survival
  • Female
  • Gallbladder Neoplasms / drug therapy*
  • Gallbladder Neoplasms / mortality
  • Gallbladder Neoplasms / pathology
  • Humans
  • Kaplan-Meier Estimate
  • Lymphatic Metastasis
  • Male
  • Middle Aged
  • Organoplatinum Compounds / administration & dosage
  • Oxaliplatin
  • Panitumumab
  • Proto-Oncogene Proteins / genetics
  • Proto-Oncogene Proteins p21(ras)
  • Treatment Outcome
  • ras Proteins / genetics

Substances

  • Antibodies, Monoclonal
  • KRAS protein, human
  • Organoplatinum Compounds
  • Proto-Oncogene Proteins
  • Oxaliplatin
  • Deoxycytidine
  • Panitumumab
  • gemcitabine
  • Proto-Oncogene Proteins p21(ras)
  • ras Proteins