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Open AccessJournal ArticleDOI

BRAF mutation is a powerful prognostic factor in advanced and recurrent colorectal cancer

TLDR
Presence of mutated BRAF is one of the most powerful prognostic factors for advanced and recurrent CRC, and the KRAS13 mutation showed a trend towards poor OS in patients with advanced and recurring CRC.
Abstract
Activating mutation of KRAS and BRAF are focused on as potential prognostic and predictive biomarkers in patients with colorectal cancer (CRC) treated with anti-EGFR therapies This study investigated the clinicopathological features and prognostic impact of KRAS/BRAF mutation in advanced and recurrent CRC patients Patients with advanced and recurrent CRC treated with systemic chemotherapy (n=229) were analysed for KRAS/BRAF genotypes by cycleave PCR Prognostic factors associated with survival were identified by univariate and multivariate analyses using the Cox proportional hazards model KRAS and BRAF mutations were present in 345% and 65% of patients, respectively BRAF mutated tumours were more likely to develop on the right of the colon, and to be of the poorly differentiated adenocarcinoma or mucinous carcinoma, and peritoneal metastasis The median overall survival (OS) for BRAF mutation-positive and KRAS 13 mutation-positive patients was 110 and 277 months, respectively, which was significantly worse than that for patients with wild-type (wt) KRAS and BRAF (406 months) (BRAF; HR=425, P<0001, KRAS13; HR=203, P=0024) After adjustment for significant features by multivariate Cox regression analysis, BRAF mutation was associated with poor OS (HR=423, P=0019) Presence of mutated BRAF is one of the most powerful prognostic factors for advanced and recurrent CRC The KRAS13 mutation showed a trend towards poor OS in patients with advanced and recurrent CRC

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Japanese Society for Cancer of the Colon and Rectum (JSCCR) guidelines 2010 for the treatment of colorectal cancer

TL;DR: The English version of the JSCCR Guidelines 2016 is presented, which can be used as a tool for treating colorectal cancer in actual clinical practice settings and as a guide to obtaining informed consent from patients and choosing the method of treatment for each patient.
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Clinical Features and Outcome of Patients With Non–Small-Cell Lung Cancer Harboring BRAF Mutations

TL;DR: V600E mutations are significantly associated with female sex and represent a negative prognostic factor in patients with non-small-cell lung cancer and a number of other clinicopathologic parameters potentially useful for the selection of patients carrying BRAF mutations were identified.
Journal ArticleDOI

Microsatellite Instability and BRAF Mutation Testing in Colorectal Cancer Prognostication

TL;DR: Combined BRAF/MSI status in colorectal cancer is a tumor molecular biomarker for prognosic risk stratification and no evidence existed for a differential prognostic role of BRAF mutation by MSI status.
References
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Journal ArticleDOI

Mechanism of Activation of the Raf-Erk Signaling Pathway by Oncogenic Mutations of B-Raf

TL;DR: The high activity mutants signal to ERK by directly phosphorylating MEK, whereas the impaired activity mutants stimulate MEK by activating endogenous C-RAF, possibly via an allosteric or transphosphorylation mechanism.
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Effects of KRAS, BRAF, NRAS, and PIK3CA mutations on the efficacy of cetuximab plus chemotherapy in chemotherapy-refractory metastatic colorectal cancer: a retrospective consortium analysis

TL;DR: This is the largest cohort to date of patients with chemotherapy-refractory metastatic colorectal cancer treated with cetuximab plus chemotherapy in the pre-KRAS selection era and confirmed that, if KRAS is not mutated, assessing BRAF, NRAS, and PIK3CA population response rates confirmed that.
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Fluorouracil, Leucovorin, and Oxaliplatin With and Without Cetuximab in the First-Line Treatment of Metastatic Colorectal Cancer

TL;DR: KRAS mutational status was shown to be a highly predictive selection criterion in relation to the treatment decision regarding the addition of cetuximab to FOLFOX-4 for previously untreated patients with metastatic colorectal cancer.
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