Annotation Detail

Information
Associated Genes
KRAS
Associated Variants
KRAS G12/G13
KRAS G12/G13
Associated Disease
colorectal cancer
Source Database
CIViC Evidence
Description
This was a retrospective clinical study of 44 metastatic colorectal cancer patients who recieved FOLFIRI (5-Fluorouacil + Folinic acid + irinotecan) first-line therapy alone or with bevacizumab. It assessed the relationship between KRAS mutation status in primary tumors and response to irinotecan-based first line therapy, as measured by PFS. Of the 44 patients, 26 had wildtype KRAS and 18 had mutations in KRAS—including G12A, G12C, G12D, G12R, G12S, G12V, and G13D. The study found that patients harboring a KRAS mutation were not significantly more resistant to irinotecan-based first-line therapy than patients with wildtype KRAS. The difference in PFS between patients with KRAS-mutated tumors and the patients with wtKRAS tumors was nonsignificant (PFS: 13.7 and 12.0 months; p= 0.074).
Variant Origin
somatic
Variant Origin
Somatic
Evidence URL
https://civic.genome.wustl.edu/links/evidence_items/6294
Gene URL
https://civic.genome.wustl.edu/links/genes/30
Variant URL
https://civic.genome.wustl.edu/links/variants/77
Rating
3
Evidence Type
Predictive
Disease
Colorectal Cancer
Evidence Direction
Does Not Support
Drug
Irinotecan
Evidence Level
B
Clinical Significance
Resistance
Pubmed
19603024
Drugs
Drug NameSensitivitySupported
IrinotecanResitance or Non-Reponsefalse