Electrochemical Detection of Single Nucleotide Polymorphism (SNP) Using Microelectrode Array on a DNA Chip

미소전극어레이형 DNA칩을 이용한 유전자다형의 전기화학적 검출

  • 최용성 (원광대학교 전기전자 및 정보공학부) ;
  • 권영수 (동아대학교 전기전자 및 컴퓨터 공학부) ;
  • 박대희 (원광대학교 전기전자 및 정보공학부)
  • Published : 2004.05.01

Abstract

In this study, an integrated microelectrode array was fabricated on glass slide using microfabrication technology. Probe DNAs consisting of mercaptohexyl moiety at their 5-end were spotted on the gold electrode using micropipette or DNA arrayer utilizing the affinity between gold and sulfur. Cyclic voltammetry in 5mM ferricyanide/ferrocyanide solution at 100 ㎷/s confirmed the immobilization of probe DNA on the gold electrodes. When several DNAs were detected electrochemically, there was a difference between target DNA and control DNA in the anodic peak current values. It was derived from specific binding of Hoechst 33258 to the double stranded DNA due to hybridization of target DNA. It suggested that this DNA chip could recognize the sequence specific genes. It suggested that multichannel electrochemical DNA microarray is useful to develop a portable device for clinical gene diagnostic System.

Keywords

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