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.
复制标题

DOI:
10.1021/ja2005576
复制
发表时间:
2011-03-30
影响因子:
15
通讯作者:
Corn, Robert M.
Corn, Robert M.
中科院分区:
化学1区
文献类型:
--
作者:
Sendroiu, Iuliana E.;Gifford, Lida K.;Luptak, Andrej;Corn, Robert M.

文献摘要

参考文献

被引文献

相似文献

DNA 微阵列是生物传感应用中检测和鉴定核酸的宝贵工具。当与表面酶促反应结合时,多重单链 DNA (ssDNA) 表面生物亲和感测的灵敏度和选择性可以大大增强。在此,我们描述了一种新方法,其中目标 ssDNA 模板分子特定序列依赖性吸附到 ssDNA 修饰的金微阵列上,然后通过 RNA 聚合酶的原位表面转录生成 ssRNA 的多个拷贝。然后,通过特异性吸附到与 ssRNA 转录物一端互补的 ssDNA 的第二个相邻“检测器”元件上,检测在此“生成器”元件上产生的 RNA。然后使用 SPR 成像来检测互补 DNA 包被的金纳米粒子与表面结合的 RNA 的后续杂交。这种基于 RNA 转录的双元件扩增方法用于检测 25 μL(25 zeptomoles)体积中浓度低至 1 fM 的 ssDNA。
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).
用DNA功能化的二氧化硅涂层金纳米棒的制造,以增强表面等离子体共振成像生物传感应用。
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
DOI: 10.1021/ja001215b
发表时间: 2000-09-27
影响因子: 15
作者:
He, L;Musick, MD;Keating, CD
通讯作者: Keating, CD
DOI: 10.1116/1.2994689
发表时间: 2008-09
期刊: Biointerphases
影响因子: 2.1
作者:
Sendroiu IE;Corn RM
通讯作者: Corn RM
DOI: 10.1021/ja039823p
发表时间: 2004-04-07
影响因子: 15
作者:
Goodrich, TT;Lee, HJ;Corn, RM
通讯作者: Corn, RM
DOI: 10.1038/nmeth.1178
发表时间: 2008-02-01
期刊: NATURE METHODS
影响因子: 48
作者:
He, Mingyue;Stoevesandt, Oda;Taussig, Michael J.
通讯作者: Taussig, Michael J.