PAGE: parametric analysis of gene set enrichment

BMC Bioinformatics
Seon-Young Kim, David J Volsky

Abstract

Gene set enrichment analysis (GSEA) is a microarray data analysis method that uses predefined gene sets and ranks of genes to identify significant biological changes in microarray data sets. GSEA is especially useful when gene expression changes in a given microarray data set is minimal or moderate. We developed a modified gene set enrichment analysis method based on a parametric statistical analysis model. Compared with GSEA, the parametric analysis of gene set enrichment (PAGE) detected a larger number of significantly altered gene sets and their p-values were lower than the corresponding p-values calculated by GSEA. Because PAGE uses normal distribution for statistical inference, it requires less computation than GSEA, which needs repeated computation of the permutated data set. PAGE was able to detect significantly changed gene sets from microarray data irrespective of different Affymetrix probe level analysis methods or different microarray platforms. Comparison of two aged muscle microarray data sets at gene set level using PAGE revealed common biological themes better than comparison at individual gene level. PAGE was statistically more sensitive and required much less computational effort than GSEA, it could identify si...Continue Reading

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Datasets Mentioned

BETA
GDS

Methods Mentioned

BETA
chips

Software Mentioned

MBEI
py2exe
RMA
Windows
MAS5
meta
PAGE
R
microarrays
GSEA

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