Fabrication of Label-Free LSPR based Multi-Spot Gold-Capped Nanoparticle Array Biochip and Detection of DNA Point Mutations in BIGH3 Gene Causing Corneal Dystrophies
Localized surface plasmon resonance (LSPR) has been considered as a useful optical property for medical applications because it measures the local refractive index, which changes with composition, size, shape and local electric environments [1,2]. This method detects an immediate increase in the thickness of a biomolecular layer on the surface of a sensitive element caused by a reaction between the biomolecule in the solution and the receptor layer immobilized on the surface. In this study, we report LSPRbased detection of the BIGH3 gene mutations by using multi-spot goldcapped nanoparticle array (MG-NPA) biochip. The analytical range and sensitivity of the MG-NPA biochip were determined by measuring different concentrations of each Corneal Dystrophy (CD) target DNA in the range of 1 fM to 1 μM. The selective discrimination against a single-base mismatch DNA sequence was also achieved by using both homozygous and heterozygous CD samples. This MG-NPA platform would be useful for selective and sensitive detection of various DNA point mutations [This work was supported in part by the IT Leading R&D Support Project from the Ministry of Knowledge Economy through KEIT].
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
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