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Old 06-02-2009, 06:24 AM   #1
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Location: Princeton, NJ

Join Date: May 2008
Posts: 1
Default qPCR vs gene expression arrays vs short read RNA sequencing

Hi! I wanted to share our experiences with RNA-seq. Don't give up on your gene expression arrays just yet! Zia

Measuring differential gene expression by short read sequencing: quantitative comparison to 2-channel gene expression microarrays
Joshua S Bloom, Zia Khan, Leonid Kruglyak, Mona Singh, Amy A Caudy
BMC Genomics 2009, 10:221 (12 May 2009)

Background: High-throughput cDNA synthesis and sequencing of poly(A)-enriched RNA is rapidly emerging as a technology competing to replace microarrays as a quantitative platform for measuring gene expression.
Results: Consequently, we compared full length cDNA sequencing to 2-channel gene expression microarrays in the context of measuring differential gene expression. Because of its comparable cost to a gene expression microarray, our study focused on the data obtainable from a single lane of an Illumina 1 G sequencer. We compared sequencing data to a highly replicated microarray experiment profiling two divergent strains of S. cerevisiae.
Conclusion: Using a large number of quantitative PCR (qPCR) assays, more than previous studies, we found that neither technology is decisively better at measuring differential gene expression. Further, we report sequencing results from a diploid hybrid of two strains of S. cerevisiae that indicate full length cDNA sequencing can discover heterozygosity and measure quantitative allele-specific expression simultaneously.
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