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Issue 5, 2005
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Construction of an electrochemical DNA chip for simultaneous genotyping of single nucleotide polymorphisms

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Abstract

An electrochemical DNA chip was constructed for simultaneous genotyping of single nucleotide polymorphisms (SNPs) using genomic DNA extracted from blood samples. This chip consisted of electrodes located on a single piece of substrate and allele-specific oligonucleotide probes on the electrodes. As a first application, the 4 SNPs (MxA[−88], MxA[−123], MBL[X/Y], and MBL[A/B]), which have association with the efficacy of interferon therapy for HCV patient, were genotyped on the new DNA chip. Following hybridization of PCR products containing the 4 types of fragments, washing, bisbenzimide H33258 (Hoechst 33258) reaction and electrochemical analyses, 59 blood samples were genotyped by the chip method simultaneously. All procedures were completed within 2 h and the results were 100% concordant with those by the direct sequence method. The electrochemical DNA chip is expected to be a practical tool for SNPs genotyping.

Graphical abstract: Construction of an electrochemical DNA chip for simultaneous genotyping of single nucleotide polymorphisms

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Publication details

The article was received on 10 Sep 2004, accepted on 10 Mar 2005 and first published on 22 Mar 2005


Article type: Paper
DOI: 10.1039/B414030N
Citation: Analyst, 2005,130, 687-693

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    Construction of an electrochemical DNA chip for simultaneous genotyping of single nucleotide polymorphisms

    M. Takahashi, J. Okada, K. Ito, M. Hashimoto, K. Hashimoto, Y. Yoshida, Y. Furuichi, Y. Ohta, S. Mishiro and N. Gemma, Analyst, 2005, 130, 687
    DOI: 10.1039/B414030N

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