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Nanoparticle-based detection and quantification of DNA with single nucleotide polymorphism (SNP) discrimination selectivity.


ABSTRACT: Sequence-specific DNA detection is important in various biomedical applications such as gene expression profiling, disease diagnosis and treatment, drug discovery and forensic analysis. Here we report a gold nanoparticle-based method that allows DNA detection and quantification and is capable of single nucleotide polymorphism (SNP) discrimination. The precise quantification of single-stranded DNA is due to the formation of defined nanoparticle-DNA conjugate groupings in the presence of target/linker DNA. Conjugate groupings were characterized and quantified by gel electrophoresis. A linear correlation between the amount of target DNA and conjugate groupings was found. For SNP detection, single base mismatch discrimination was achieved for both the end- and center-base mismatch. The method described here may be useful for the development of a simple and quantitative DNA detection assay.

SUBMITTER: Qin WJ 

PROVIDER: S-EPMC2034455 | biostudies-literature | 2007

REPOSITORIES: biostudies-literature

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Nanoparticle-based detection and quantification of DNA with single nucleotide polymorphism (SNP) discrimination selectivity.

Qin Wei Jie WJ   Yung Lin Yue Lanry LY  

Nucleic acids research 20070824 17


Sequence-specific DNA detection is important in various biomedical applications such as gene expression profiling, disease diagnosis and treatment, drug discovery and forensic analysis. Here we report a gold nanoparticle-based method that allows DNA detection and quantification and is capable of single nucleotide polymorphism (SNP) discrimination. The precise quantification of single-stranded DNA is due to the formation of defined nanoparticle-DNA conjugate groupings in the presence of target/li  ...[more]

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