A single molecule array for digital targeted molecular analyses

Jenny Göransson

doi:10.1093/nar/gkn921

2008-11-25

DOI：10.1093/nar/gkn921

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摘要

En 中文

We present a new random array format together with a decoding scheme for targeted multiplex digital molecular analyses. DNA samples are analyzed using multiplex sets of padlock or selector probes that create circular DNA molecules upon target recognition. The circularized DNA molecules are amplified through rolling-circle amplification (RCA) to generate amplified single molecules (ASMs). A random array is generated by immobilizing all ASMs on a microscopy glass slide. The ASMs are identified and counted through serial hybridizations of small sets of tag probes, according to a combinatorial decoding scheme. We show that random array format permits at least 10 iterations of hybridization, imaging and dehybridization, a process required for the combinatorial decoding scheme. We further investigated the quantitative dynamic range and precision of the random array format. Finally, as a demonstration, the decoding scheme was applied for multiplex quantitative analysis of genomic loci in samples having verified copy-number variations. Of 31 analyzed loci, all but one were correctly identified and responded according to the known copy-number variations. The decoding strategy is generic in that the target can be any biomolecule which has been encoded into a DNA circle via a molecular probing reaction.

Keyword:

COMPARATIVE GENOMIC HYBRIDIZATION

ROLLING-CIRCLE AMPLIFICATION

PROXIMITY LIGATION

PADLOCK PROBES

IN-SITU

MULTIPLEX AMPLIFICATION

PROTEIN-DETECTION

INVERSION PROBES

DNA-MOLECULES

MICROARRAYS

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对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。

期刊

Nucleic Acids Research

IF:

13.1

论文数:

3.6W

被引数:

29.0W

机构

uppsala university

学者数:

3.7W

论文数: 3.4W

被引数: 47

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