BRAF V600E and SRC mutations as molecular markers for predicting prognosis and conversion surgery in Stage IV colorectal cancer

Yoshifumi Shimada, Yusuke Muneoka, Masayuki Nagahashi, Hiroshi Ichikawa, Yosuke Tajima, Yuki Hirose, Takuya Ando, Masato Nakano, Jun Sakata, Hitoshi Kameyama, Yasumasa Takii, Yiwei Ling, Shujiro Okuda, Kazuaki Takabe, Toshifumi Wakai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Comprehensive genomic sequencing (CGS) enables us to detect numerous genetic alterations in a single assay. We aimed to identify molecular markers for predicting prognosis and conversion surgery in Stage IV colorectal cancer (CRC) using CGS. One-hundred eleven patients with Stage IV CRC who underwent primary tumor resection were analyzed. We retrospectively investigated genetic alterations using CGS of a 415-gene panel. Clinicopathological variables and genetic alterations were analyzed to identify independent prognostic factors of overall survival (OS). Forty-five of 111 patients had R0 resection; of these, 11 patients underwent conversion surgery. Univariate and multivariate analyses identified histopathological grade 3, R0 resection, BRAF V600E mutation, and SRC mutation as independent prognostic factors for OS (P = 0.041, P = 0.013, P = 0.005, and P = 0.023, respectively). BRAF V600E and SRC mutations were mutually exclusive, and SRC mutation was significantly associated with left-sided tumor and liver metastasis compared to BRAF V600E mutation (P = 0.016 and P = 0.025, respectively). Eleven of the 74 initially unresectable patients underwent conversion surgery for R0 resection, yet none harbored BRAF V600E or SRC mutations. BRAF V600E and SRC mutations are important molecular markers which can predict prognosis and conversion surgery in Stage IV CRC.

Original languageEnglish
Article number2466
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - 01-12-2019

All Science Journal Classification (ASJC) codes

  • General

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