Reference Detail

Ref Type Journal Article
PMID (28951457)
Authors Yaeger R, Yao Z, Hyman DM, Hechtman JF, Vakiani E, Zhao H, Su W, Wang L, Joelson A, Cercek A, Baselga J, de Stanchina E, Saltz L, Berger MF, Solit DB, Rosen N
Title Mechanisms of Acquired Resistance to BRAF V600E Inhibition in Colon Cancers Converge on RAF Dimerization and Are Sensitive to Its Inhibition.
Journal Cancer research
Vol 77
Issue 23
Date 2017 12 01
URL
Abstract Text BRAF V600E colorectal cancers are insensitive to RAF inhibitor monotherapy due to feedback reactivation of receptor tyrosine kinase signaling. Combined RAF and EGFR inhibition exerts a therapeutic effect, but resistance invariably develops through undefined mechanisms. In this study, we determined that colorectal cancer progression specimens invariably harbored lesions in elements of the RAS-RAF-MEK-ERK pathway. Genetic amplification of wild-type RAS was a recurrent mechanism of resistance in colorectal cancer patients that was not seen in similarly resistant melanomas. We show that wild-type RAS amplification increases receptor tyrosine kinase-dependent activation of RAS more potently in colorectal cancer than in melanoma and causes resistance only in the former. Currently approved RAF inhibitors inhibit RAF monomers but not dimers. All the drug-resistant lesions we identified activate BRAF V600E dimerization directly or by elevating RAS-GTP. Overall, our results show that mechanisms of resistance converge on formation of RAF dimers and that inhibiting EGFR and RAF dimers can effectively suppress ERK-driven growth of resistant colorectal cancer. Cancer Res; 77(23); 6513-23. ©2017 AACR.

Filtering

  • Case insensitive filtering will display rows where any text in any cell matches the filter term
  • Simple literal full or partial string matches
  • Separate multiple filter terms with a spaces, order doesn't matter (a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page, filtering has no impact on query parameters
  • Use quotes to match a longer phrase which contains spaces "mtor c1483f"

Sorting

  • Generally, the default sort order for tables is set to be first column ascending, however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column, be sure to set ascending or descending order for a given column, before moving on to the next column.

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
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 amp BRAF V600E colorectal cancer predicted - resistant Panitumumab + Vemurafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after a partial response lasting 24 weeks to Vectibix (panitumumab) and Zelboraf (vemurafenib) combination treatment, amplification of BRAF V600E was identified as an acquired alteration at the time of progression (PMID: 28951457). 28951457
BRAF V600E NRAS amp colorectal cancer predicted - resistant Panitumumab + Vemurafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after achieving stable disease for 16 weeks with Vectibix (panitumumab) and Zelboraf (vemurafenib) combination treatment, NRAS amplification was identified as an acquired alteration at the time of progression (PMID: 28951457). 28951457
BRAF V600E NRAS G13R colorectal cancer predicted - resistant Alpelisib + Cetuximab + Encorafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after a partial response lasting 24 weeks to Alpelisib (BYL719), Erbitux (cetuximab), and Braftovi (encorafenib) combination treatment, NRAS G13R was identified as an acquired mutation in liver metastasis at the time of progression (PMID: 28951457). 28951457
BRAF V600E NRAS G13R colorectal cancer predicted - sensitive BGB659 + Cetuximab Preclinical - Pdx Actionable In a preclinical study, BGB659 and Erbitux (cetuximab) combination treatment resulted in sustained inhibition of Mek and Erk phosphorylation, lead to tumor regression in patient-derived xenograft models of colorectal cancer harboring BRAF V600E and NRAS G13R (PMID: 28951457). 28951457
BRAF V600E NRAS Q61K colorectal cancer predicted - resistant Panitumumab + Vemurafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after a partial response lasting 40 weeks to Vectibix (panitumumab) and Zelboraf (vemurafenib) combination treatment, NRAS Q61K was identified as an acquired mutation at the time of progression (PMID: 28951457). 28951457
BRAF V600E NRAS over exp colorectal cancer sensitive BGB659 + Cetuximab Preclinical - Cell culture Actionable In a preclinical study, BGB659 and Erbitux (cetuximab) combination treatment demonstrated enhanced inhibition of Erk phosphorylation and growth in BRAF V600E colorectal cancer cell lines overexpressing Nras in culture (PMID: 28951457). 28951457
BRAF amp BRAF V600E colorectal cancer resistant Cetuximab + Vemurafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after a partial response lasting 16 weeks to Erbitux (cetuximab) and Zelboraf (vemurafenib) combination treatment, amplification of BRAF V600E was identified as an acquired alteration at the time of progression (PMID: 28951457). 28951457
BRAF V600E NRAS over exp colorectal cancer resistant Cetuximab + Vemurafenib Preclinical - Cell line xenograft Actionable In a preclinical study, overexpression of wild-type NRAS in colorectal cancer cell lines harboring BRAF V600E induced Ras activation and Braf/Craf dimerization, conferred resistance to Erbitux (cetuximab) and Zelboraf (vemurafenib) combination treatment in culture and in cell line xenograft models (PMID: 28951457). 28951457
BRAF V47_D380del BRAF V600E colorectal cancer predicted - resistant Alpelisib + Cetuximab + Encorafenib Case Reports/Case Series Actionable In a clinical case study, a patient with BRAF V600E colorectal cancer developed progressive disease after a partial response lasting 24 weeks to Alpelisib (BYL719), Erbitux (cetuximab), and Braftovi (encorafenib) combination treatment, BRAF V47_D380del (reported as deletion of exons 2-8) was identified as an acquired mutation in peritoneal metastasis at the time of progression (PMID: 28951457). 28951457