Annotation Detail

Information
Associated Genes
BRAF
Associated Variants
BRAF MUTATION
BRAF MUTATION
Associated Disease
colorectal cancer
Source Database
CIViC Evidence
Description
This was a retrospective clinical study of 97 metastatic colorectal cancer patients who received bevacizumab in conjunction with first-line chemotherapy (composed of 5-fluorouracil (5-FU) only, 5-FU + oxaliplatin, 5-FU + irinotecan, or 5-FU + oxaliplatin + irinotecan). It assessed the relationship between BRAF mutation status in primary tumors and response to bevacizumab-containing first line chemotherapy, as measured by PFS. Of the 97 patients,89 had wildtype BRAF and 8 had mutations in BRAF—including V600E and D594K. The study found that patients harboring a BRAF mutation were significantly more resistant to bevacizumab-containing first-line chemotherapy than patients with wildtype BRAF (Median PFS: 4.2 and 12.5 months, respectively; p < .0001).
Variant Origin
somatic
Variant Origin
Somatic
Evidence URL
https://civic.genome.wustl.edu/links/evidence_items/6305
Gene URL
https://civic.genome.wustl.edu/links/genes/5
Variant URL
https://civic.genome.wustl.edu/links/variants/399
Rating
3
Evidence Type
Predictive
Disease
Colorectal Cancer
Evidence Direction
Supports
Drug
Bevacizumab
Evidence Level
B
Clinical Significance
Resistance
Pubmed
19603024
Drugs
Drug NameSensitivitySupported
BevacizumabResitance or Non-Reponsetrue