Annotation Detail

Information
Associated Genes
BRAF
Associated Variants
BRAF APC
BRAF APC
Associated Disease
melanoma
Source Database
CIViC Evidence
Description
In a retrospective study of 44 relapsed melanoma patients harboring BRAF V600E or V600K (known BRAF inhibitor sensitizing mutations), MAPK pathway reactivation mechanisms were implicated in acquired resistance to BRAF inhibitor (vemurafenib or dabrafenib) monotherapy. The following MAPK pathway variants were found in progressive tumors with patient matched baseline tumors (some patients donated samples from multiple geographically/temporally distinct progressive tumors): NRAS mutations (G12D, G12R, G13R, Q61K, Q61R, Q61L) in 13/71 (18%) of progressive tumors, KRAS mutations (G12C, G12R, Q61H) in 5/71 (7%) of progressive tumors, mutant BRAF amplification (2-15 fold or 4-75 copies) in 11/57 (19%) of progressive tumors, mutant BRAF alternative splice variants (novel exon boundaries between 1/9, 1/11, 3/9) in 6/48 (13%) of progressive tumor RNA.
Variant Origin
somatic
Variant Origin
Somatic
Evidence URL
https://civic.genome.wustl.edu/links/evidence_items/6401
Gene URL
https://civic.genome.wustl.edu/links/genes/5
Variant URL
https://civic.genome.wustl.edu/links/variants/2225
Rating
3
Evidence Type
Predictive
Disease
Melanoma
Evidence Direction
Supports
Drug
Vemurafenib,Dabrafenib
Evidence Level
B
Clinical Significance
Resistance
Pubmed
24265155
Drugs
Drug NameSensitivitySupported
DabrafenibResitance or Non-Reponsetrue
VemurafenibResitance or Non-Reponsetrue