Cited by 1,300Gene expression and cancer classificationBioinformatics and Genomic NetworksGenomics and Phylogenetic Studies

Genome-wide midrange transcription profiles reveal expression level relationships in human tissue specification

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Yanai, Itai, Benjamin, Hila, Shmoish, Michael, Chalifa-Caspi, Vered, Shklar, Maxim, Ophir, Ron, Bar-Even, Arren, Horn-Saban, Shirley +4 more·2005·Bioinformatics

Abstract

Motivation: Genes are often characterized dichotomously as either housekeeping or single-tissue specific. We conjectured that crucial functional information resides in genes with midrange profiles of expression. Results: To obtain such novel information genome-wide, we have determined the mRNA expression levels for one of the largest hitherto analyzed set of 62 839 probesets in 12 representative normal human tissues. Indeed, when using a newly defined graded tissue specificity index τ, valued between 0 for housekeeping genes and 1 for tissue-specific genes, genes with midrange profiles having 0.15 < τ < 0.85 were found to constitute >50% of all expression patterns. We developed a binary classification, indicating for every gene the IB tissues in which it is overly expressed, and the 12 − IB tissues in which it shows low expression. The 85 dominant midrange patterns with IB = 2–11 were found to be bimodally distributed, and to contribute most significantly to the definition of tissue specification dendrograms. Our analyses provide a novel route to infer expression profiles for presumed ancestral nodes in the tissue dendrogram. Such definition has uncovered an unsuspected correlation, whereby de novo enhancement and diminution of gene expression go hand in hand. These findings highlight the importance of gene suppression events, with implications to the course of tissue specification in ontogeny and phylogeny. Availability: All data and analyses are publically available at the GeneNote website, http://genecards.weizmann.ac.il/genenote/ and, GEO accession GSE803. Contact: doron.lancet@weizmann.ac.il Supplementary information: Four tables available at the above site.

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  1. Shklar,M. et al. (2004) GeneTide: Terra Incognita Discovery Endeavor Mining ESTs and Expression Data to Elucidate Known and De-Noro GeneCards Genes. Proceedings of the 2004 IEEE Computational Systems Bioinformatics Conference, CSB2004, 478-479.

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Authors
Yanai, I., Benjamin, H., Shmoish, M., Chalifa-Caspi, V., Shklar, M., Ophir, R., Bar-Even, A., Horn-Saban, S., Safran, M., Domany, E., Lancet, D., & Shmueli, O.
Affiliations
Weizmann Institute of Science (IL)
Corresponding author
Yanai, Itai
Venue
Bioinformatics
Published
2004-09-30
Volume
21
Issue
5
Pages
650-659
ISSN
  • 1367-4803 (ISSN-L)
  • 1367-4811
OpenAlex
W2130925862
Cited by
1,300
References
36
Citations by year
2026: 117 · 2025: 126 · 2024: 131 · 2023: 105 · 2022: 120 · 2021: 107 · 2020: 78 · 2019: 53 · 2018: 57 · 2017: 48 · 2016: 45 · 2015: 38 · 2014: 37 · 2013: 47 · 2012: 36
FWCI
4.26
Type
journal article
Language
en
Open access
Locations
  • Bioinformatics (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene expression and cancer classification
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
tissue specificity, human tissue expression, housekeeping genes, gene expression evolution, gene suppression, phylogeny, ontogeny, mRNA expression profiling
MeSH terms
Algorithms, Chromosome Mapping, Humans, Organ Specificity, Software, Tissue Distribution, Transcription Factors, Oligonucleotide Array Sequence Analysis, Proteome, Gene Expression Profiling

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