ArticlePLoS biology2025
PRMT5 regulates alternative splicing of TCF3 under hypoxia to promote EMT and invasion in breast cancer.
Article in PLoS biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Alternative Splicing in Cyclin-Dependent Kinase 4/6 Inhibitor Resistance in Estrogen Receptor-Positive Breast Cancer.Drug development research · 2026Review
- Targeting transcription factors associated with hemoglobinopathies: Lessons from successful interventions and implications for cancer.Molecular oncology · 2026Review
- Review
- Prognostic alternative splicing signatures in esophageal cancer reveal SF3A3 as a key oncogenic splicing factor.Translational cancer research · 2026Article
- Shaping Spliceosome Dynamics Through Protein Arginine Methylation.Wiley interdisciplinary reviews. RNAReview
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Authors and funding
8 authors.
Funding
Abstract
Tumor hypoxia induced alterations in the epigenetic landscape and alternative splicing influence cellular adaptations. PRMT5 is a type II protein arginine methyltransferase that regulates several tumorigenic events in many cancer types. However, the regulation of PRMT5 and its direct implication on aberrant alternative splicing under hypoxia remains unexplored. In this study, we observed hypoxia-induced upregulation of PRMT5 via the CTCF in human breast cancer cells. Further, PRMT5-mediated symmetric arginine dimethylation H4R3me2s and H3R8me2s directly regulated the alternative splicing of TCF3. Under hypoxia, PRMT5-mediated histone dimethylation at the intronic conserved region (ICR) present between TCF3 exon 18a and exon 18b recruits DNMT3A, resulting in DNA methylation. DNA methylation at the TCF3-ICR is recognized and bound by MeCP2 resulting in RNA-Pol II pausing, promoting the recruitment of the negative splicing factor PTBP1 to the splicing locus of TCF3 pre-mRNA. PTBP1 promotes the exclusion of exon 18a which results in the production of the pro-invasive TCF3-18B (E47) isoform which promotes EMT and invasion of breast cancer cells under hypoxia. Collectively, our results indicate PRMT5-mediated symmetric arginine dimethylation of histones regulates alternative splicing of TCF3 gene thereby enhancing EMT and invasion in breast cancer hypoxia.
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