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Accurate Zygote‐Specific Discrimination of Single‐Nucleotide Polymorphisms Using Microfluidic Electrochemical DNA Melting Curves
Author(s) -
Yang Allen H. J.,
Hsieh Kuangwen,
Patterson Adriana S.,
Ferguson B. Scott,
Eisenstein Michael,
Plaxco Kevin W.,
Soh H. Tom
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201310059
Subject(s) - zygote , dna , nucleotide , melting curve analysis , single nucleotide polymorphism , high resolution melt , microfluidics , materials science , melting temperature , biology , genetics , computational biology , nanotechnology , gene , genotype , polymerase chain reaction , composite material , embryogenesis
We report the first electrochemical system for the detection of single‐nucleotide polymorphisms (SNPs) that can accurately discriminate homozygous and heterozygous genotypes using microfluidics technology. To achieve this, our system performs real‐time melting‐curve analysis of surface‐immobilized hybridization probes. As an example, we used our sensor to analyze two SNPs in the apolipoprotein E ( ApoE ) gene, where homozygous and heterozygous mutations greatly affect the risk of late‐onset Alzheimer’s disease. Using probes specific for each SNP, we simultaneously acquired melting curves for probe–target duplexes at two different loci and thereby accurately distinguish all six possible ApoE allele combinations. Since the design of our device and probes can be readily adapted for targeting other loci, we believe that our method offers a modular platform for the diagnosis of SNP‐based diseases and personalized medicine.