ReviewMolecular and cellular pediatrics2025
Characterization of a PRKCE::ETV6 fusion as a potential oncogenic driver in T-cell acute lymphoblastic leukemia.
Review in Molecular and cellular pediatrics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundT-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy caused by mutation accumulation during hematopoiesis. The characterization of chromosomal abnormalities may provide significant insights into genetic mechanisms of malignant transformation in hematopoietic cells. However, T-ALL is genetically very heterogenous and driving mutations as well as clonal markers for the assessment of minimal residual disease are not always identifiable. Hence, there is a clinical need to further refine the genetic landscape of T-ALL including previously unrecognized fusion partners of commonly translocated genes in T-ALL of childhood.
resultsIn this study, we screened n = 229 T-ALL cases by our targeted genomic capture high-throughput sequencing (gc-HTS) approach. In total, we identified n = 60 gene–gene fusions, present in n = 57 (25%) of the patients. Nine rare or even unrecognized translocations were identified and validated. Furthermore, owing to its interesting chromosomal structure, we studied the oncogenic potential of the complex rearrangement of chromosome 2 and 12, found in a near-early T-cell progenitor (ETP) ALL that leads to the fusion events PRKCE::ETV6 and ETV6::INO80D. Exogenous expression of PRKCE::ETV6 in Ba/F3 pro-B and D1 T-cells caused interleukin-independent proliferation and enhanced survival upon interleukin withdrawal, respectively.
conclusionOur study underlines the heterogenous mutational landscape in T-ALL. The previously unrecognized PRKCE::ETV6 resulting from a complex rearrangement involving chromosome 2 and 12 demonstrated transforming potential in cytokine-dependent cellular models support the notion of a driver mutation in near ETP-ALL. Our data reconfirm the relevance of ETV6-fusion proteins in the pathogenesis of undifferentiated T-ALL. Importantly, genomic breakpoints at the ETV6 locus represent potentially robust MRD markers for (near) ETP-ALL that lack IG/TR rearrangements.
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