DESCRIPTION:

Probe sets ID significantly regulated in KRASG12V Vs KRASG12D transfected Colo741 cell clones. Probe sets ID, with relative gene symbols or Ensembl Transcript ID, significantly regulated in the comparison between the clones bearing the KRAS mutations (G12V and G12D)

LABEL:

Trans. Colo741 Cell

SCORE TYPE:

Q-Value

DATE ADDED:

2010-06-23

DATE UPDATED:

2024-04-25

SPECIES:

AUTHORS:

Monticone M, Biollo E, Maffei M, Donadini A, Romeo F, Storlazzi CT, Giaretti W, Castagnola P

TITLE:

Gene expression deregulation by KRAS G12D and G12V in a BRAF V600E context.

JOURNAL:

Molecular cancer Dec 2008, Vol 7, pp. 92

ABSTRACT:

BACKGROUND: KRAS and BRAF mutations appear of relevance in the genesis and progression of several solid tumor types but the co-occurrence and interaction of these mutations have not yet been fully elucidated. Using a microsatellite stable (MSS) colorectal cancer (CRC) cell line (Colo741) having mutated BRAF and KRASWT, we also aimed to investigate the KRAS-BRAF interaction. Gene expression profiles for control KRASWT, KRAS G12V and KRAS G12D transfected cells were obtained after cell clone selection and RT-PCR screening. Extensive qPCR was performed to confirm microarray data. RESULTS: We found that the KRAS G12V state deregulated several genes associated to cell cycle, apoptosis and nitrogen metabolism. These findings indicated a reduced survival and proliferation with respect to the KRASWT state. The KRAS G12D state was, instead, characterized by several other distinct functional changes as for example those related to chromatin organization and cell-cell adhesion without affecting apoptosis related genes. CONCLUSION: These data predict that the G12D mutation may be more likely selected in a BRAF mutated context. At the same time, the presence of the KRAS G12V mutation in the cells escaping apoptosis and inducing angiogenesis via IL8 may confer a more aggressive phenotype. The present results get along with the observations that CRCs with G12V are associated with a worse prognosis with respect to the WT and G12D states and may help identifying novel CRC pathways and biomarkers of clinical relevance. PUBMED: 19087308
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