Gold nanoparticle-based detection of genomic DNA targets on microarrays using a novel optical detection system

作者: James J Storhoff , Sudhakar S Marla , Paul Bao , Susan Hagenow , Hitesh Mehta

DOI: 10.1016/J.BIOS.2003.08.014

关键词: NanotechnologyComplementary DNAgenomic DNABiologyNanoparticleColloidal goldBiosensorOligonucleotideDNA microarrayDNA

摘要: Abstract The development of a nanoparticle-based detection methodology for sensitive and specific DNA-based diagnostic applications is described. technology utilizes gold nanoparticles derivatized with thiol modified oligonucleotides that are designed to bind complementary DNA targets. A glass surface arrays immobilized oligonucleotide capture sequences used targets, which then detected via hybridization the nanoparticle probes. Amplification silver allows quantitation by measuring evanescent wave induced light scatter low-cost optical systems. Compared Cy3-based fluorescence, amplified probes provide ∼1000-fold increase in sensitivity. Furthermore, direct non-amplified genomic from infectious agents afforded through increased specificity even identification single nucleotide polymorphisms (SNP) human appears feasible.

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