DNA hybridization assays using metal-enhanced fluorescence.

Abstract:

:We describe a new approach to DNA hybridization assays using metal-enhanced fluorescence. Thiolated oligonucleotides were bound to silver particles on a glass substrate. Addition of a complementary fluorescein-labeled oligonucleotide resulted in a dramatic time-dependent 12-fold increase in fluorescence intensity during hybridization. Proximity to silver particles resulted in a decreased fluorescence lifetime. This effect is thought to be the result of enhanced fluorescence from fluorescein near metallic silver particles. Hybridization could thus be measured from the decay kinetics of the emission, which can be measured independently from the emission intensity. These results suggest the use of silver particles as a general approach to measure DNA hybridization as a method to increase the sensitivity of DNA detection.

authors

Malicka J,Gryczynski I,Lakowicz JR

doi

10.1016/s0006-291x(03)00935-5

subject

Has Abstract

pub_date

2003-06-20 00:00:00

pages

213-8

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X03009355

journal_volume

306

pub_type

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