Simultaneous Determination of Single Nucleotide Polymorphisms of MDR1 Genes by Electrochemical DNA Chip

  • NAKAMURA Tsutomu
    Department of Hospital Pharmacy, School of Medicine, Kobe University
  • SAKAEDA Toshiyuki
    Department of Hospital Pharmacy, School of Medicine, Kobe University
  • TAKAHASHI Masayoshi
    Corporate Research & Development Center, Toshiba Co.
  • HASHIMOTO Koji
    Corporate Research & Development Center, Toshiba Co.
  • GEMMA Nobuhiro
    Corporate Research & Development Center, Toshiba Co.
  • MORIYA Yuka
    Department of Hospital Pharmacy, School of Medicine, Kobe University
  • KOMOTO Chiho
    Department of Hospital Pharmacy, School of Medicine, Kobe University
  • NISHIGUCHI Kohshi
    Department of Hospital Pharmacy, School of Medicine, Kobe University
  • OKAMURA Noboru
    Department of Clinical Evaluation of Pharmacotherapy, Kobe University Graduate School of Medicine
  • OKUMURA Katsuhiko
    Department of Hospital Pharmacy, School of Medicine, Kobe University Department of Clinical Evaluation of Pharmacotherapy, Kobe University Graduate School of Medicine

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Abstract

  The on-chip genotyping system (“the electrochemical DNA chip”) has been developed as a more cost-effective genotyping system and was applied to MDR1 genotyping in the present study, which is required for wide use in clinical application and for personalized medication based on genotype. The electrochemical DNA chip was optimized and applied to simultaneous genotyping of four MDR1 polymorphisms (T-129C, C1236T, G2677(A,T) and C3435T) using synthetic model oligonucleotide DNA and human genomic DNA. The electrochemical DNA chip successfully gave the T-129C, C1236T, G2677(A,T) and C3435T genotypes, which were completely consistent with those determined by direct sequencing. In conclusion, the electrochemical DNA chip is useful for simultaneous determination of some genotypes and haplotypes, and efficient genotyping using this system can support future genotype-phenotype studies at a large scale.<br>

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