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Similar gene expression profiles do not imply similar tissue functions

Item Type:Editorial
Title:Similar gene expression profiles do not imply similar tissue functions
Creators Name:Yanai, I. and Korbel, J.O. and Boue, S. and McWeeney, S.K. and Bork, P. and Lercher, M.J.
Abstract:Although similarities in gene expression among tissues are commonly inferred to reflect functional constraints, this has never been formally tested. Furthermore, it is unclear which evolutionary processes are responsible for the observed similarities. When examining genomewide expression data in mouse, we found that patterns of expression similarity between tissues extend to genes that are unlikely to function in the tissues. Thus, ectopic expression can seem coordinated across tissues. This indicates that knowledge of gene expression patterns per se is insufficient to infer gene function. Ectopic expression is possibly explained as expression leakage, caused by spreading of chromatin modifications or the transcription apparatus into neighboring genes.
Keywords:Cluster Analysis, Gene Expression Profiling, Gene Expression Regulation, Genes, Genetic Transcription, Oligonucleotide Array Sequence Analysis, Organ Specificity, Phylogeny, Animals
Source:Trends in Genetics
Publisher:Elsevier (The Netherlands)
Page Range:132-138
Date:March 2006
Official Publication:https://doi.org/10.1016/j.tig.2006.01.006
PubMed:View item in PubMed

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