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Medical Oncology

, 33:71 | Cite as

Comparison of KRAS mutation status between primary tumor and metastasis in Chinese colorectal cancer patients

  • Zhe-Zhen Li
  • Long Bai
  • Feng Wang
  • Zi-Chen Zhang
  • Fang Wang
  • Zhao-Lei Zeng
  • Jun-Bo Zeng
  • Dong-Sheng Zhang
  • Feng-Hua Wang
  • Zhi-Qiang Wang
  • Yu-Hong Li
  • Jian-Yong Shao
  • Rui-Hua XuEmail author
Original Paper

Abstract

Detection of KRAS mutation status is a routine clinical procedure for predicting response to anti-EGFR therapy in colorectal cancer (CRC) patients. Previous studies showed high concordance of KRAS mutation status in primary lesion and corresponding metastatic sites in CRC. However, the data were mostly from Caucasians. The aim of this study is to compare KRAS mutation and other molecules mutation status between primary tumor and corresponding metastatic lesion in Chinese patients with CRC. In this retrospective study, Chinese CRC patients with paired samples of primary tumor and metastatic site were detected for KRAS codon 12 and 13 with quantitative real-time PCR, or detected for OncoCarta™ panel of 19 genes with MassARRAY® technique, including KRAS, BRAF, NRAS and PIK3CA et al. Forty-eight paired CRC samples were analyzed for KRAS codon 12 and 13 using quantitative real-time PCR. Ten paired samples were analyzed by 19 genes OncoCarta™ Panel with MassARRAY® technique. KRAS mutation was found in 15 (25.9 %) primary tumors and 18 (31.0 %) metastases. The discordance of KRAS was observed in 11 (19.0 %) patients. Alteration of mutation points in primary site with mutant KRAS was not observed. In the 10 patients with multiple gene detection, PIK3CA mutation showed concordant mutation status in primary tumor and metastatic site, whereas discordance in BRAF, NRAS and AKT1 was detected. A concordance rate of 81.0 % was detected in KRAS mutation between primary tumor and metastatic lesion in Chinese patients with CRC. Discordance of BRAF, NRAS and AKT1 mutation status in primary tumor and metastases was observed.

Keywords

Colorectal cancer KRAS mutation Primary tumor Metastases Concordance 

Notes

Acknowledgments

This work was supported by The National Natural Science Foundation of China (No. 81372570), the Science and Technology Department of Guangdong Province, China (No. 2012B031800088) and the Science and Technology Department of Guangdong Province, China (No. C2011019). The authors gratefully thank staff members in the Department of Medical Oncology and Department of Molecular Diagnostics at Sun Yat-sen University Cancer Center for their suggestions and assistance.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Informed consent was obtained from all individual participants included in the study, giving their authorization to access their clinical information and tumor samples for research purpose.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Zhe-Zhen Li
    • 1
  • Long Bai
    • 1
  • Feng Wang
    • 1
  • Zi-Chen Zhang
    • 2
  • Fang Wang
    • 2
  • Zhao-Lei Zeng
    • 1
  • Jun-Bo Zeng
    • 3
  • Dong-Sheng Zhang
    • 1
  • Feng-Hua Wang
    • 1
  • Zhi-Qiang Wang
    • 1
  • Yu-Hong Li
    • 1
  • Jian-Yong Shao
    • 2
  • Rui-Hua Xu
    • 1
    Email author
  1. 1.Department of Medical Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer CenterGuangzhouPeople’s Republic of China
  2. 2.Department of Molecular Diagnostics, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer CenterGuangzhouPeople’s Republic of China
  3. 3.Faculty of Medical SciencesSun Yat-sen UniversityGuangzhouPeople’s Republic of China

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