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Article Open Access

Eprobe-mediated screening system for somatic mutations in the KRAS locus

  • Authors:
    • Jun Atsumi
    • Takeshi Hanami
    • Yasuaki Enokida
    • Hiroomi Ogawa
    • Diane Delobel
    • Yasumasa Mitani
    • Yasumasa Kimura
    • Takahiro Soma
    • Michihira Tagami
    • Yoshiaki Takase
    • Tatsuo Ichihara
    • Izumi Takeyoshi
    • Kengo Usui
    • Yoshihide Hayashizaki
    • Kimihiro Shimizu
  • View Affiliations / Copyright

    Affiliations: Departments of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan, Division of Genomic Technologies, RIKEN Center for Life Science Technologies, Yokohama, Kanagawa, Japan, RIKEN Preventive Medicine and Diagnosis Innovation Program, Yokohama, Kanagawa, Japan
    Copyright: © Atsumi et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 2719-2727
    |
    Published online on: March 30, 2015
       https://doi.org/10.3892/or.2015.3883
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Abstract

Activating mutations in the Kirsten rat sarcoma viral oncogene homolog (KRAS) loci are largely predictive of resistance to epidermal growth factor receptor (EGFR) therapy in colorectal cancer (CRC). A highly sensitive detection system for the KRAS gene mutations is urgently needed; however, conventional methods have issues with feasibility and cost performance. Here, we describe a novel detection system using a fluorescence ʻEprobe’ capable of detecting low level KRAS gene mutations, via real-time PCR, with high sensitivity and simple usability. We designed our Eprobes to be complementary to wild-type (WT) KRAS or to the commonly mutated codons 12 and 13. The WT Eprobe binds strongly to the WT DNA template and suppresses amplification by blocking annealing of the primer during PCR. Eprobe-PCR with WT Eprobe shows high sensitivity (0.05-0.1% of plasmid DNA, 1% of genomic DNA) for the KRAS mutation by enrichment of the mutant type (MT) amplicon. Assay performance was compared to Sanger sequencing using 92 CRC samples. Discrepancies were analyzed by mutation genotyping via Eprobe-PCR with full match Eprobes for 7 prevalent mutations and the next generation sequencing (NGS). Significantly, the Eprobe system had a higher sensitivity for detecting KRAS mutations in CRC patient samples; these mutations could not be identified by Sanger sequencing. Thus, the Eprobe approach provides for highly sensitive and convenient mutation detection and should be useful for diagnostic applications.
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Copy and paste a formatted citation
Spandidos Publications style
Atsumi J, Hanami T, Enokida Y, Ogawa H, Delobel D, Mitani Y, Kimura Y, Soma T, Tagami M, Takase Y, Takase Y, et al: Eprobe-mediated screening system for somatic mutations in the KRAS locus. Oncol Rep 33: 2719-2727, 2015.
APA
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y. ... Shimizu, K. (2015). Eprobe-mediated screening system for somatic mutations in the KRAS locus. Oncology Reports, 33, 2719-2727. https://doi.org/10.3892/or.2015.3883
MLA
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y., Kimura, Y., Soma, T., Tagami, M., Takase, Y., Ichihara, T., Takeyoshi, I., Usui, K., Hayashizaki, Y., Shimizu, K."Eprobe-mediated screening system for somatic mutations in the KRAS locus". Oncology Reports 33.6 (2015): 2719-2727.
Chicago
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y., Kimura, Y., Soma, T., Tagami, M., Takase, Y., Ichihara, T., Takeyoshi, I., Usui, K., Hayashizaki, Y., Shimizu, K."Eprobe-mediated screening system for somatic mutations in the KRAS locus". Oncology Reports 33, no. 6 (2015): 2719-2727. https://doi.org/10.3892/or.2015.3883
Copy and paste a formatted citation
x
Spandidos Publications style
Atsumi J, Hanami T, Enokida Y, Ogawa H, Delobel D, Mitani Y, Kimura Y, Soma T, Tagami M, Takase Y, Takase Y, et al: Eprobe-mediated screening system for somatic mutations in the KRAS locus. Oncol Rep 33: 2719-2727, 2015.
APA
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y. ... Shimizu, K. (2015). Eprobe-mediated screening system for somatic mutations in the KRAS locus. Oncology Reports, 33, 2719-2727. https://doi.org/10.3892/or.2015.3883
MLA
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y., Kimura, Y., Soma, T., Tagami, M., Takase, Y., Ichihara, T., Takeyoshi, I., Usui, K., Hayashizaki, Y., Shimizu, K."Eprobe-mediated screening system for somatic mutations in the KRAS locus". Oncology Reports 33.6 (2015): 2719-2727.
Chicago
Atsumi, J., Hanami, T., Enokida, Y., Ogawa, H., Delobel, D., Mitani, Y., Kimura, Y., Soma, T., Tagami, M., Takase, Y., Ichihara, T., Takeyoshi, I., Usui, K., Hayashizaki, Y., Shimizu, K."Eprobe-mediated screening system for somatic mutations in the KRAS locus". Oncology Reports 33, no. 6 (2015): 2719-2727. https://doi.org/10.3892/or.2015.3883
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