RNA expression profiling at the single molecule level.

Abstract:

:We developed a microarray platform for PCR amplification-independent expression profiling of minute samples. A novel scanning system combined with specialized biochips enables detection down to individual fluorescent oligonucleotide molecules specifically hybridized to their complementary sequence over the entire biochip surface of cm2 size. A detection limit of 1.3 fM target oligonucleotide concentration--corresponding to only 39,000 molecules in the sample solution--and a dynamic range of 4.7 orders of magnitude have been achieved. The applicability of the system to PCR amplification-independent gene-expression profiling of minute samples was demonstrated by complex hybridization of cDNA derived from the equivalent of only 10(4) cells, which matches results obtained in ensemble studies on large samples. By counting each hybridized molecule on the microarray, the method is insusceptible to gene-specific variations of the labeling, thereby representing a principle advance to conventional ensemble-based microarray analysis.

journal_name

Genome Res

journal_title

Genome research

authors

Hesse J,Jacak J,Kasper M,Regl G,Eichberger T,Winklmayr M,Aberger F,Sonnleitner M,Schlapak R,Howorka S,Muresan L,Frischauf AM,Schütz GJ

doi

10.1101/gr.4999906

subject

Has Abstract

pub_date

2006-08-01 00:00:00

pages

1041-5

issue

8

eissn

1088-9051

issn

1549-5469

pii

gr.4999906

journal_volume

16

pub_type

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