for people ages 18 years and up (full criteria)
at La Jolla, California and other locations
study started
estimated completion



To evaluate the efficacy of vemurafenib in combination with cobimetinib (GDC-0973), compared with vemurafenib and placebo, in previously untreated BRAF V600 mutation-positive patients with unresectable locally advanced or metastatic melanoma, as measured by progression-free survival (PFS), assessed by the study site investigator.

Official Title

A Phase III, Double-Blind, Placebo-Controlled Study of Vemurafenib Versus Vemurafenib Plus GDC-0973 in Previously Untreated BRAF^600-Mutation Positive Patients With Unresectable Locally Advanced or Metastatic Melanoma


Malignant Melanoma Zelboraf vemurafenib RG7204 PLX4032 Genentech MEK inhibitor Genentech BRAF inhibitor Roche MEK inhibitor Roche BRAF inhibitor RO5185426 metastatic melanoma BRAF positive melanoma BRAF mutant melanoma advanced melanoma Genentech RAF inhibitor Roche RAF inhibitor BRAF V600E kinase inhibitor Oncogenic BRAF inhibitor BRAF kinase inhibitor GDC-0973 XL518 melanoma Cobimetinib Cobimetinib + Vemurafenib


You can join if…

Open to people ages 18 years and up

  • Participants with histologically confirmed melanoma, either unresectable stage IIIc or stage IV metastatic melanoma, as defined by the American Joint Committee on Cancer 7th edition. Unresectability of stage IIIc disease must have confirmation from a surgical oncologist
  • Participants must be naïve to treatment for locally advanced unresectable or metastatic disease (ie, no prior systemic anti-cancer therapy for advanced disease; stage IIIc and IV). Prior adjuvant immunotherapy (including ipilimumab) is allowed
  • Documentation of BRAF V600 mutation-positive status in melanoma tumor tissue (archival or newly obtained tumor samples) using the cobas 4800 BRAF V600 mutation test
  • Measurable disease per RECIST v1.1
  • Eastern Clinical Oncology Group performance status of 0 or 1
  • Consent to provide archival for biomarker analyses
  • Consent to undergo tumor biopsies for biomarker analyses
  • Life expectancy greater than or equal to (≥) 12 weeks
  • Adequate hematologic and end organ function

You CAN'T join if...

  • History of prior rapidly accelerated fibrosarcoma or mitogen-activated protein kinase pathway inhibitor treatment
  • Palliative radiotherapy within 14 days prior to the first dose of study treatment
  • Major surgery or traumatic injury within 14 days prior to first dose of study treatment
  • Active malignancy other than melanoma that could potentially interfere with the interpretation of efficacy measures. Participants with a previous malignancy within the past 3 years are excluded except for participants with resected basal cell carcinoma or squamous cell carcinoma of the skin, melanoma in-situ, carcinoma in-situ of the cervix, and carcinoma in-situ of the breast
  • History of or evidence of retinal pathology on ophthalmological examination that is considered a risk factor for neurosensory retinal detachment, retinal vein occlusion, or neovascular macular degeneration
  • Uncontrolled glaucoma with intraocular pressure
  • Serum cholesterol ≥ Grade 2
  • Hypertriglyceridemia ≥ Grade 2
  • Hyperglycemia (fasting) ≥ Grade 2
  • History of clinically significant cardiac dysfunction
  • Participants with active central nervous system (CNS) lesions (including carcinomatous meningitis) are excluded. However, participants are eligible if:
  • All known CNS lesions have been treated with stereotactic therapy or surgery, AND
  • There has been no evidence of clinical and radiographic disease progression in the CNS for ≥ 3 weeks after radiotherapy or surgery
  • Current severe, uncontrolled systemic disease
  • History of malabsorption or other condition that would interfere with absorption of study drugs
  • Pregnant, lactating, or breast feeding women


  • University of California San Diego Moores Cancer Center
    La Jolla California 92037 United States
  • California Cancer Associates for Research & Excellence, Inc.
    Encinitas California 92008 United States


in progress, not accepting new patients
Start Date
Completion Date
Hoffmann-La Roche
Phase 3
Study Type
Last Updated