These results seem to indicate that Cdx2 may play a role in the serrated pathway to colorectal cancer as underlined by strong relationships with BRAF(V600E), CIMP-high and MMR-deficiency.
Alterations in <i>MEK1/2</i> occur in cancers, both in the treatment-naïve state and following targeted therapies, most notably BRAF and MEK inhibitors in <i>BRAF</i>-V600E-mutant melanoma and colorectal cancer.
Here, we investigate molecular responses upon single and multi-target treatments, over time, using BRAF(V600E) mutant colorectal cancer cells as a model system.
The detection of a positive BRAF-V600E mutation in a colorectal cancer suggests a sporadic origin of the disease and the absence of germline alterations of MLH1, MSH2 and also of MSH6.
Promoter methylation of Wnt5a is associated with microsatellite instability and BRAF V600E mutation in two large populations of colorectal cancer patients.
This improved classification of serrated lesions including immunohistochemical evaluation of BRAF V600E mutation may be the key to identify lesions with higher potential to progression into sessile serrated adenoma/polyp, and further to BRAF V600E-mutated colorectal cancer.
Identification and Characterization of Small-Molecule Inhibitors to Selectively Target the DFG-in over the DFG-out Conformation of the B-Raf Kinase V600E Mutant in Colorectal Cancer.
Thus, large-scale KRAS mutation screening is needed for efficient patient management and in the future metastatic colorectal cancer genotyping might also include the detection of the BRAF V600E mutation, which is a very strong negative prognostic factor in colorectal cancer.
The US Food and Drug Administration approved a liquid biopsy test for EGFR-activating mutations in patients with non-small-cell lung cancer as a companion diagnostic for therapy selection. ctDNA also allows for the identification of mutations selected by treatment such as EGFR T790M in non-small-cell lung cancer. ctDNA can also detect mutations such as KRAS G12V in colorectal cancer and BRAF V600E/V600K in melanoma.
BRAF was mutated in 7.6% (484 of 6353) of colorectal cancer and 9.1% (29 of 317) of SBA samples, but V600E mutations were much less common in SBA, representing only 10.3% (3 of 29) of BRAF-mutated cases.
BRAF V600E is the predominantly occurring mutation of the cytoplasmic kinase BRAF, and, in colorectal cancer, its determination provides a diagnostic exclusion criterion for hereditary nonpolyposis colorectal cancer.