Genomic Profiling of KRAS/NRAS/BRAF/PIK3CA Wild-Type Metastatic Colorectal Cancer Patients Reveals Novel Mutations in Genes Potentially Associated with Resistance to Anti-EGFR Agents
[Paper-level Aggregated] PMCID: PMC6627713
Evidence Type(s): Oncogenic, Prognostic, Functional
Justification: Oncogenic: Several variants, including those in the TP53 and APC genes, are associated with cancer development, and specific mutations like p.Arg505Cys in FBXW7 have been reported to lead to loss of function, contributing to oncogenesis. Prognostic: The presence of certain variants, such as those in MAP2K1 and FBXW7, correlates with progression-free survival (PFS) outcomes, indicating their potential role in predicting disease progression. Functional: The variant p.Lys57Glu in MAP2K1 is associated with a gain of function of the MEK1 protein, indicating a functional impact on protein activity that may influence cancer pathways.
Gene→Variant (gene-first): FBXW7(55294):c.1268G>T FBXW7(55294):p.Gly423Val FBXW7(55294):c.1513C>T EGFR(1956):c.1798G>A FBXW7(55294):p.Arg505Cys BRAF(673):p.Asp600Asn MAP2K1(5604):c.169A>G MAP2K1(5604):c.199G>A MAP2K1(5604):p.Asp67Asn MAP2K1(5604):p.Lys57Glu KRAS(3845):c.183A>T KRAS(3845):p.Gln61His TP53(7157):c.275_276insGGCC APC(324):c.4098_4099delTCinsAT APC(324):c.4467_4468insCATTTTG APC(324):c.589_590insGAGTT APC(324):c.837_838InsG NF1(4763):c.5101A>T NF1(4763):c.638_639insA NF1(4763):p.Asn214Lys fs*2 NF1(4763):p.Lys1701Ter
Genes: FBXW7(55294) EGFR(1956) BRAF(673) MAP2K1(5604) KRAS(3845) TP53(7157) APC(324) NF1(4763)
Variants: c.1268G>T p.Gly423Val c.1513C>T c.1798G>A p.Arg505Cys p.Asp600Asn c.169A>G c.199G>A p.Asp67Asn p.Lys57Glu c.183A>T p.Gln61His c.275_276insGGCC c.4098_4099delTCinsAT c.4467_4468insCATTTTG c.589_590insGAGTT c.837_838InsG c.5101A>T c.638_639insA p.Asn214Lys fs*2 p.Lys1701Ter