Ultrasensitive DNA microarray biosensing via in situ RNA transcription-based amplification and nanoparticle-enhanced SPR imaging.
Ultrasensitive DNA microarray biosensing via in situ RNA transcription-based amplification and nanoparticle-enhanced SPR imaging.
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DOI:
10.1021/ja2005576
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发表时间:
2011-03-30
影响因子:
15
通讯作者:
Corn, Robert M.
中科院分区:
文献类型:
--
作者:
Sendroiu, Iuliana E.;Gifford, Lida K.;Luptak, Andrej;Corn, Robert M.
DNA microarrays are invaluable tools for the detection and identification of nucleic acids in biosensing applications. The sensitivity and selectivity of multiplexed single-stranded DNA (ssDNA) surface bioaffinity sensing can be greatly enhanced when coupled to a surface enzymatic reaction. Herein we describe a novel method where the specific sequence-dependent adsorption of a target ssDNA template molecule onto a ssDNA-modified gold microarray is followed with the generation of multiple copies of ssRNA via in situ surface transcription by RNA polymerase. The RNA created on this “generator” element is then detected by specific adsorption onto a second adjacent “detector” element of ssDNA that is complementary to one end of the ssRNA transcript. SPR imaging is then used to detect the subsequent hybridization of complementary DNA-coated gold nanoparticles with the surface-bound RNA. This RNA transcription-based, dual element amplification method is used to detect ssDNA down to a concentration of 1 fM in a volume of 25 μL (25 zeptomoles).
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DOI:
10.1021/la902675s
发表时间:
2009-10-06
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
作者:
Sendroiu IE;Warner ME;Corn RM
通讯作者:
Corn RM
影响因子:
15
作者:
He, L;Musick, MD;Keating, CD
通讯作者:
Keating, CD
影响因子:
2.1
作者:
Sendroiu IE;Corn RM
通讯作者:
Corn RM
影响因子:
15
作者:
Goodrich, TT;Lee, HJ;Corn, RM
通讯作者:
Corn, RM
影响因子:
48
作者:
He, Mingyue;Stoevesandt, Oda;Taussig, Michael J.
通讯作者:
Taussig, Michael J.