Show Notes
Arterbery et al., The American Journal of Human Genetics - Hundreds of genes have been reported as causes of cerebral palsy, yet there is no agreed model of what a pathogenic variant in a child with CP actually means. This study treats CP as a phenotypic feature that some genetic disorders make more likely, tests the reported genes against the population prevalence of CP across tens of thousands of published individuals, and finds statistical evidence of association for only 89 of 515, before applying that stratification to genome sequencing of 460 children with CP. Key terms: cerebral palsy, Mendelian disease, genome sequencing, Human Phenotype Ontology, gene-disease association.
Study Highlights:
Across 21 published genomic diagnostic cohorts, variants deemed causal of cerebral palsy had been reported in 515 genes, with no consensus on whether such variants cause CP, mimic it, or coexist with it. The authors modelled CP as a phenotypic feature with a known population prevalence and applied a Bonferroni-corrected binomial test to 280 genes drawn from 5,508 publications describing 43,897 individuals, rejecting the null hypothesis of no association for 86 genes, and for 89 when combined with the genes enriched across the CP sequencing cohorts. Genome sequencing of 460 children with CP from 453 families at Shriners Children's identified pathogenic or likely pathogenic variants in 60 genes in 15.8% of the children. Only 16 of those 60 genes had significant literature evidence for CP association, which still represented a 16.3-fold enrichment over the overlap expected by chance. The results support a stratified approach in which the strength of evidence for each gene shapes how a molecular finding in a child with CP is interpreted.
Conclusion:
A pathogenic variant found in a child with cerebral palsy does not carry the same weight for every gene: for most of the 515 genes reported so far, the literature does not yet provide statistical evidence that the associated disorder raises the likelihood of CP. Treating CP as a phenotype with graded genetic evidence offers a framework for attributing causality more carefully in precision genomic diagnosis, while leaving open that more genes may prove to be associated as data accumulate.
Music:
Enjoy the music based on this article at the end of the episode.
Article title:
A phenotypic paradigm for cerebral palsy genetics
First author:
Arterbery
Journal:
The American Journal of Human Genetics
DOI:
10.1016/j.ajhg.2026.08.007
Reference:
Arterbery, A.S., Gargano, M.A., et al., and Robinson, P.N. (2026). A phenotypic paradigm for cerebral palsy genetics. The American Journal of Human Genetics 113, 1972-1986. https://doi.org/10.1016/j.ajhg.2026.08.007
License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/
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QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-09-13.
QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the scientific body: the shift to genetic explanations of CP and 515 candidate genes, the two-pronged methodology with HPO encoding and Exomiser, the Poisson and binomial tests, the 89-gene result and Shriners cohort yield, the CTNNB1 and LIPH examples, the limitations, and the phenotypic paradigm.
- transcript topics: Shift from perinatal-injury to genetic explanations of CP; 515 candidate genes across 21 CP sequencing cohorts; Literature curation and gene-specific cohorts; HPO text mining with fenominal, phenopackets and Exomiser; Poisson and binomial tests against CP population prevalence; 89 of 515 genes with evidence and the Shriners cohort yield
QC Summary:
- factual score: 9/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 3
- metadata checks passed: 4
- metadata issues found: 0
Metadata Audited:
- article_doi
- article_title
- article_journal
- license
Factual Items Audited:
- 21 CP NGS cohorts with 5,440 individuals and 515 genes
- Binomial test on 280 gene-specific cohorts from over 43,000 individuals
- Poisson test on the CP NGS cohort genes
- CP background prevalence taken as 0.3%
- Null hypothesis rejected for 89 of 515 genes
- 460 children sequenced, P/LP variants in 60 genes, 15.8% yield
QC Flagged Items (audited and not fully supported):
- Core claim uncertain: The 44 genes in the Shriners cohort without literature evidence were merely present in those children and not responsible for their CP.
- Core claim uncertain: The individual reported with a LIPH variant probably had a separate perinatal hypoxic event that actually caused the CP.
- Core claim uncertain: Finding a P/LP variant in a gene with established CP association lets clinicians know the child's trajectory with certainty and start intervention early.
Internal QC note: manual editorial review is recommended before publication.
QC result: Warning. Items above were flagged during automated QC; the editorial team reviewed them before release.
