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Ref Type Journal Article
PMID (25589621)
Authors Yaeger R, Cercek A, O'Reilly EM, Reidy DL, Kemeny N, Wolinsky T, Capanu M, Gollub MJ, Rosen N, Berger MF, Lacouture ME, Vakiani E, Saltz LB
Title Pilot trial of combined BRAF and EGFR inhibition in BRAF-mutant metastatic colorectal cancer patients.
Journal Clinical cancer research : an official journal of the American Association for Cancer Research
Vol 21
Issue 6
Date 2015 Mar 15
Abstract Text BRAF-mutant metastatic colorectal cancer (mCRC) forms an aggressive subset of colorectal cancer with minimal response to selective RAF inhibitors. Preclinical data show that reactivation of EGFR signaling occurs in colorectal tumor cells treated with RAF inhibitors and that the addition of an EGFR inhibitor enhances antitumor activity. These data suggest that combined therapy with RAF and EGFR inhibitors could be an effective strategy for treating BRAF V600E mCRC.We undertook a pilot trial to assess the response rate and safety of the BRAF inhibitor vemurafenib combined with anti-EGFR antibody panitumumab in patients with BRAF-mutant mCRC. Patients received standard approved doses of panitumumab and vemurafenib.Fifteen patients were treated. Performance status was Eastern Cooperative Oncology Group (ECOG) 0 in 4 patients (27%) and ECOG 1 in 11 patients (73%). All patients had progressed through at least one standard treatment regimen, and 8 (53%) had received previous fluoropyrimidine, oxaliplatin, and irinotecan chemotherapy. Treatment was well tolerated, with less cutaneous toxicity than would be expected with either agent, and no cases of keratoacanthomas/squamous cell carcinomas. Tumor regressions were seen in 10 of 12 evaluable patients with partial responses in 2 patients (100% and 64% regression lasting 40 and 24 weeks, respectively), and stable disease lasting over 6 months in 2 patients.Combined RAF and EGFR inhibition is well tolerated, with less cutaneous toxicity than would be expected with either agent, and results in modest clinical activity in this highly aggressive and chemoresistant subset of CRC.


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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
BRAF V600E colorectal cancer sensitive Panitumumab + Vemurafenib Phase I Actionable In a Phase I trial, 83% (10/12) of patients with colorectal cancer carrying a BRAF V600E mutation demonstrated tumor regression when treated with a combination of Zelboraf (vemurafenib) and Vectibix (panitumumab) (PMID: 25589621). 25589621