Evidence map›Paper›PMID 40926263›Full record

ArticleGenome biology2025

Patterns of extreme outlier gene expression suggest an edge of chaos effect in transcriptomic networks.

Chen Xie, Sven Künzel, Wenyu Zhang, Cassandra A Hathaway, Shelley S Tworoger, Diethard Tautz

Abstract read
In one paragraph

Article in Genome biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

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4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Chen XieDepartment of Evolutionary Genetics, Max-Planck Institute for Evolutionary Biology, Plön, Germany.ORCID http://orcid.org/0000-0002-6183-7301
Sven KünzelDepartment of Evolutionary Genetics, Max-Planck Institute for Evolutionary Biology, Plön, Germany.ORCID http://orcid.org/0000-0003-4992-5963
Wenyu ZhangShaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, 710129, China.ORCID http://orcid.org/0000-0002-2507-3033
Cassandra A HathawayDepartment of Cancer Epidemiology, Moffitt Cancer Center, FL, Tampa, USA.ORCID http://orcid.org/0000-0002-2919-0499
Shelley S TworogerDivision of Oncological Sciences, Knight Cancer Institute, Oregon Health and Science University, Portland, USA.ORCID http://orcid.org/0000-0002-6986-7046
Diethard TautzDepartment of Evolutionary Genetics, Max-Planck Institute for Evolutionary Biology, Plön, Germany. tautz@evolbio.mpg.de.ORCID http://orcid.org/0000-0002-0460-5344

Funding

Statistical MethodsP01CA087969 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI ELIASSEN, A. HEATHER, TAMIMI, RULLA M · 2000 to 2019
$77.8M
Life Course Cancer Epidemiology Cohort in WomenU01CA176726 · NCI · HARVARD UNIVERSITY D/B/A HARVARD SCHOOL OF PUBLIC HEALTH · PI ELIASSEN, A. HEATHER, WILLETT, WALTER C. · 2018 to 2025
$22.4M
Basic and Applied Basic Research Foundation of Guangdong Province 2024A1515030117Max-Planck-Gesellschaft DT_PloenNational Health Service Corps P01 CA87969National Natural Science Foundation of China 32370665NCI NIH HHS P01 CA087969NCI NIH HHS U01 CA176726
6 · The paper itself

Abstract

backgroundMost RNA-seq datasets harbor genes with extreme expression levels in some samples. Such extreme outliers are usually treated as technical errors and are removed from the data before further statistical analysis. Here we focus on the patterns of such outlier gene expression to investigate whether they provide insights into the underlying biology.

resultsOur study is based on multiple datasets, including data from outbred and inbred mice, GTEx data from humans, data from different Drosophila species, and single-nuclei sequencing data from human brain tissues. All show comparable general patterns of outlier gene expression, indicating this as a generalizable biological effect. Different individuals can harbor very different numbers of outlier genes, with some individuals showing extreme numbers in only one out of several organs. Outlier gene expression occurs as part of co-regulatory modules, some of which correspond to known pathways. In a three-generation family analysis in mice, we find that most extreme over-expression is not inherited, but appears to be sporadically generated. Genes encoding prolactin and growth hormone are also among the co-regulated genes with extreme outlier expression, both in mice and humans, for which we include also a longitudinal expression analysis for protein data.

conclusionsWe show that outlier patterns of gene expression are a biological reality occurring universally across tissues and species. Most of the outlier expression is spontaneous and not inherited. We suggest that the outlier patterns reflect edge of chaos effects that are expected for systems of non-linear interactions and feedback loops, such as gene regulatory networks.

Indexed as

Gene Regulatory NetworksTranscriptomeAnimalsDrosophilaGene Expression ProfilingHumansMiceRNA-SeqDrosophilaFamily studyHumansMiceOutlier expressionSingle-cell analysisTranscriptome analysis

Identifiers

PMID40926263
PMCPMC12418659

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