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 Resjournal_title
Genome researchauthors
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 GJdoi
10.1101/gr.4999906subject
Has Abstractpub_date
2006-08-01 00:00:00pages
1041-5issue
8eissn
1088-9051issn
1549-5469pii
gr.4999906journal_volume
16pub_type
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