Cited by 423Bioinformatics and Genomic NetworksGene expression and cancer classificationCancer-related molecular mechanisms research

Gene co-expression network analysis reveals common system-level properties of prognostic genes across cancer types

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Yang, Yang, Han, Leng, Yuan, Yuan, Li, Jun, Hei, Nainan, Liang, Han·2014·Nature Communications

Abstract

Prognostic genes are key molecules informative for cancer prognosis and treatment. Previous studies have focused on the properties of individual prognostic genes, but have lacked a global view of their system-level properties. Here we examined their properties in gene co-expression networks for four cancer types using data from 'The Cancer Genome Atlas'. We found that prognostic mRNA genes tend not to be hub genes (genes with an extremely high connectivity), and this pattern is unique to the corresponding cancer-type-specific network. In contrast, the prognostic genes are enriched in modules (a group of highly interconnected genes), especially in module genes conserved across different cancer co-expression networks. The target genes of prognostic miRNA genes show similar patterns. We identified the modules enriched in various prognostic genes, some of which show cross-tumour conservation. Given the cancer types surveyed, our study presents a view of emergent properties of prognostic genes.

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  • Even when no sample classification is available, subpopulation-specific modules can be resolved, an approach that has been particularly successful in classifying different cancer subtypes to provide prognostic markers.

    “Even when no sample classification is available, subpopulation-specific modules can be resolved, an approach that has been particularly successful in classifying different cancer subtypes to provide prognostic markers [18–20].”

    From Gene co-expression analysis for functional classification and gene–disease predictions (2017) · cites this paper as [19]

    The Methods (Integrative module analysis) describe using module-gene expression to classify tumor samples into subtypes, and the Results (Some prognostic modules are conserved across tumor types) report distinct survival curves for those subtypes in four cancers. The paper does not establish that the modules themselves are subpopulation-specific or explicitly demonstrate their resolution when no sample classification is available; it also describes potential clinical relevance rather than established prognostic markers. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • WGCNA was the first co-expression tool to be applied to RNA-seq data; it has effectively identified biologically relevant associations between phenotypes and modules, performing similarly to microarray-based analyses.

    “WGCNA was the first co-expression tool to be applied to RNA-seq data; it has effectively identified biologically relevant associations between phenotypes and modules [19, 66, 67], performing similarly to microarray-based analyses.”

    From Gene co-expression analysis for functional classification and gene–disease predictions (2017) · cites this paper as [19]

    The Results section ('Some prognostic modules are conserved across tumor types'; page not provided) reports WGCNA-derived modules associated with patient survival, supporting biologically relevant module–phenotype associations. But Methods ('Co-expression network construction'; page not provided) says the networks were built from microarray data. The paper does not establish that WGCNA was the first co-expression tool applied to RNA-seq data or that its RNA-seq performance was similar to microarray-based analyses. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Authors
Yang, Y., Han, L., Yuan, Y., Li, J., Hei, N., & Liang, H.
Affiliations
  • The University of Texas MD Anderson Cancer Center (US)
  • The University of Texas Health Science Center at Houston (US)
Corresponding author
Liang, Han
Venue
Nature Communications
Published
2014-02-03
Volume
5
Issue
1
Pages
3231-3231
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2171115585
Cited by
423
References
43
Citations by year
2026: 10 · 2025: 23 · 2024: 25 · 2023: 24 · 2022: 36 · 2021: 46 · 2020: 34 · 2019: 76 · 2018: 42 · 2017: 31 · 2016: 48 · 2015: 19 · 2014: 9
FWCI
14.61
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Institutes of Health (CA- 016672)
  • National Cancer Institute (CA 016672, CA143883, CA016672 to, U24CA143883, P30CA016672)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene expression and cancer classification
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
Keywords
prognostic genes, gene co-expression network, hub genes, gene modules, miRNA target genes, cancer prognosis, network topology, mRNA expression, TCGA
MeSH terms
Humans, Neoplasms, Prognosis, Biomarkers, Tumor, MicroRNAs

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