ArticleHuman molecular genetics2019
Splicing factor DHX15 affects tp53 and mdm2 expression via alternate splicing and promoter usage.
Article in Human molecular genetics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 16 citations in OpenAlex.
- Splicing-driven post-translational dysregulation: a new frontier for precision cancer medicine and immunotherapy.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026Review
- Identification of Dhx15 as a Major Regulator of Liver Development, Regeneration, and Tumor Growth in Zebrafish and Mice.International journal of molecular sciences · 2024Article
- A common cellular response to broad splicing perturbations is characterized by metabolic transcript downregulation driven by the Mdm2-p53 axis.Disease models & mechanisms · 2024Article
- The emerging significance of splicing in vertebrate development.Development (Cambridge, England) · 2022Review
- Zrsr2 Is Essential for the Embryonic Development and Splicing of Minor Introns in RNA and Protein Processing Genes in Zebrafish.International journal of molecular sciences · 2022Article
- The RNA helicase DHX15 is a critical regulator of natural killer-cell homeostasis and functions.Cellular & molecular immunology · 2022Article
- Review
- Adaptive homeostasis and the p53 isoform network.EMBO reports · 2021Review
- The loss of DHX15 impairs endothelial energy metabolism, lymphatic drainage and tumor metastasis in mice.Communications biology · 2021Article
- The spliceosome factor sart3 regulates hematopoietic stem/progenitor cell development in zebrafish through the p53 pathway.Cell death & disease · 2021Article
- Dhx15 regulates zebrafish definitive hematopoiesis through the unfolded protein response pathway.Cancer science · 2021Article
- The Δ133p53 Isoforms, Tuners of the p53 Pathway.Cancers · 2020Review
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
DHX15, a DEAH box containing RNA helicase, is a splicing factor required for the last step of splicing. Recent studies identified a recurrent mutational hotspot, R222G, in DHX15 in ∼ 6% of acute myeloid leukemia (AML) patients that carry the fusion protein RUNX1-RUNX1T1 produced by t (8;21) (q22;q22). Studies using yeast mutants showed that substitution of G for the residue equivalent to R222 leads to loss of its helicase function, suggesting that it is a loss-of-function mutation. To elucidate the role of DHX15 during development, we established the first vertebrate knockout model with CRISPR/Cas9 in zebrafish. Our data showed that dhx15 expression is enriched in the brain, eyes, pectoral fin primordia, liver and intestinal bulb during embryonic development. Dhx15 deficiency leads to pleiotropic morphological phenotypes in homozygous mutant embryos starting at 3 days post fertilization (dpf) that result in lethality by 7 dpf, revealing an essential role during embryonic development. RNA-seq analysis suggested important roles of Dhx15 in chromatin and nucleosome assembly and regulation of the Mdm2-p53 pathway. Interestingly, exons corresponding to the alternate transcriptional start sites for tp53 and mdm2 were preferentially expressed in the mutant embryos, leading to significant upregulation of their alternate isoforms, Δ113p53 (orthologous to Δ133p53 isoform in human) and mdm2-P2 (isoform using distal promoter P2), respectively. We speculate that these alterations in the Mdm2-p53 pathway contribute to the development of AML in patients with t(8;21) and somatically mutated DHX15.
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