Treatment Rationale Study Design for the MetLung Trial: A Randomized, Double-Blind Phase III Study of Onartuzumab (MetMAb) in Combination With Erlotinib Versus Erlotinib Alone in Patients Who Have Received Standard Chemotherapy for Stage IIIB or IV Met-Positive Non-Small-Cell Lung Cancer

Clin Lung Cancer. 2012 Nov;13(6):500-4. doi: 10.1016/j.cllc.2012.05.009.


We present the treatment rationale and study design of the MetLung phase III study. This study will investigate onartuzumab (MetMAb) in combination with erlotinib compared with erlotinib alone, as second- or third-line treatment, in patients with advanced non-small-cell lung cancer (NSCLC) who are Met-positive by immunohistochemistry. Approximately 490 patients (245 per treatment arm) will receive erlotinib (150 mg oral daily) plus onartuzumab or placebo (15 mg/kg intravenous every 3 weeks) until disease progression, unacceptable toxicity, patient or physician decision to discontinue, or death. The efficacy objectives of this study are to compare overall survival (OS) (primary endpoint), progression-free survival, and response rates between the 2 treatment arms. In addition, safety, quality of life, pharmacokinetics, and translational research will be investigated across treatment arms. If the primary objective (OS) is achieved, this study will provide robust results toward an alternative treatment option for patients with Met-positive second- or third-line NSCLC.

Publication types

  • Clinical Trial, Phase III
  • Multicenter Study
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Carcinoma, Non-Small-Cell Lung / drug therapy*
  • Disease Progression
  • Double-Blind Method
  • Drug Therapy, Combination
  • Erlotinib Hydrochloride
  • Humans
  • Lung Neoplasms / drug therapy*
  • Protein Kinase Inhibitors / therapeutic use*
  • Quinazolines / therapeutic use*
  • Research Design
  • Survival Analysis


  • Protein Kinase Inhibitors
  • Quinazolines
  • Erlotinib Hydrochloride