BRAF mutation is associated with the CpG island methylator phenotype in colorectal cancers from young patients

P.W. Ang, W.Q. Li, R. Soong, Barry Iacopetta

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    17 Citations (Scopus)

    Abstract

    This study investigated the relationship between BRAF mutation, the CpG island methylator phenotype (CIMP+) and APC methylation in colorectal cancer (CRC) from young patients. The V600E BRAF mutation was found in 7% of cases and was strongly associated with the tumour features of proximal site, advanced stage and poor histological grade. More than half (53%) the tumours with BRAF mutation were also CIMP+ as evaluated by a standard panel of markers, compared to only 4% of tumours with wildtype BRAF (P <0.0001). In contrast to CIMP+, APC methylation was inversely correlated with BRAF mutation (P = 0.02). BRAF mutation and CIMP+ are therefore likely to be involved in an alternate, albeit rare, pathway to APC inactivation during the development of CRC in younger patients.
    Original languageEnglish
    Pages (from-to)221-224
    JournalCancer Letters
    Volume273
    Issue number2
    DOIs
    Publication statusPublished - 2009

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