Abstract:
:Microarrays have been widely used for the analysis of gene expression, but the issue of reproducibility across platforms has yet to be fully resolved. To address this apparent problem, we compared gene expression between two microarray platforms: the short oligonucleotide Affymetrix Mouse Genome 430 2.0 GeneChip and a spotted cDNA array using a mouse model of angiotensin II-induced hypertension. RNA extracted from treated mice was analyzed using Affymetrix and cDNA platforms and then by quantitative RT-PCR (qRT-PCR) for validation of specific genes. For the 11,710 genes present on both arrays, we assessed the relative impact of experimental treatment and platform on measured expression and found that biological treatment had a far greater impact on measured expression than did platform for more than 90% of genes, a result validated by qRT-PCR. In the small number of cases in which platforms yielded discrepant results, qRT-PCR generally did not confirm either set of data, suggesting that sequence-specific effects may make expression predictions difficult to make using any technique.
journal_name
Nat Methodsjournal_title
Nature methodsauthors
Larkin JE,Frank BC,Gavras H,Sultana R,Quackenbush Jdoi
10.1038/nmeth757keywords:
subject
Has Abstractpub_date
2005-05-01 00:00:00pages
337-44issue
5eissn
1548-7091issn
1548-7105pii
nmeth757journal_volume
2pub_type
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