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PMID: 16356924 Published · epublish English Comparative Study Evaluation Study Journal Article Research Support, Non-U.S. Gov't

Integrating probe-level expression changes across generations of Affymetrix arrays.

Nucleic acids research ·Vol. 33 ·No. 22 ·2005-12-14 ·Pages e193

Elo LL, Lahti L, Skottman H, Kyläniemi M, Lahesmaa R, Aittokallio T

Abstract

There is an urgent need for bioinformatic methods that allow integrative analysis of multiple microarray data sets. While previous studies have mainly concentrated on reproducibility of gene expression levels within or between different platforms, we propose a novel meta-analytic method that takes into account the vast amount of available probe-level information to combine the expression changes across different studies. We first show that the comparability of relative expression changes and the consistency of differentially expressed genes between different Affymetrix array generations can be considerably improved by determining the expression changes at the probe-level and by considering the latest information on probe-level sequence matching instead of the probe annotations provided by the manufacturer. With the improved probe-level expression change estimates, data from different generations of Affymetrix arrays can be combined more effectively. This will allow for the full exploitation of existing results when designing and analyzing new experiments.

MeSH Terms
Animals Cell Line Female Gene Expression Profiling/methods Humans Meta-Analysis as Topic Mice Mice, Inbred BALB C Oligonucleotide Array Sequence Analysis/methods Oligonucleotide Probes Reproducibility of Results Sample Size
Chemicals
Oligonucleotide Probes
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Elo Laura L
Department of Mathematics, FIN-20014, University of Turku, Finland. [email protected]
Lahti Leo
Skottman Heli
Kyläniemi Minna
Lahesmaa Riitta
Aittokallio Tero
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Article Info
Journal
Nucleic acids research
Abbr.
Nucleic Acids Res
ISSN
1362-4962
Published
2005-12-14
Epub
2005-00-14
Pages
e193
Language
English
Region
England
NLM ID
0411011
PMCID
PMC1316121
Subset
IM
Analysis Services
Analysis Services

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