Ribosome biogenesis and selective translational control as oncogenic vulnerabilities in hematologic malignancies.

Abstract

The translation of the transcriptome into a functional proteome is not a passive readout of mRNA abundance but a primary regulatory layer that actively shapes the oncogenic landscape. In hematologic malignancies, convergent oncogenic signaling pathways, including MYC, PI3K/AKT/mTOR, and tyrosine kinase fusions, directly reprogram the translational apparatus, driving a qualitative shift toward the selective synthesis of pro-survival, proliferative, and stemness-associated proteins. This deregulated program is orchestrated through multiple interconnected axes: the accelerated biogenesis of ribosomes within the nucleolus, the assembly of the eIF4F initiation complex, the activation of stress-adaptive programs like the integrated stress response (ISR), and a sophisticated layer of epitranscriptomic, tRNA, and RNA-binding protein-mediated regulation. Hematologic cancers provide a uniquely informative framework for deconstructing these processes, illustrated by inherited ribosomopathies, such as Diamond-Blackfan anemia syndrome and Shwachman-Diamond syndrome, which resolve the paradox of how ribosomal insufficiency can evolutionarily transition into malignant transformation. Beyond pathogenesis, the translational machinery represents a rich landscape of actionable vulnerabilities. Pharmacological targeting of RNA Polymerase I, eIF4A, and the ISR has demonstrated selective antitumor activity and synergistic potential with established therapies, including BCL-2 inhibition. This review synthesizes mechanistic and clinical evidence to position the ribosome as an active regulatory node rather than a passive decoding machine. We further examine the challenges facing the field, including translational plasticity under therapeutic pressure, the lack of validated companion biomarkers, and the emerging role of translational control in modulating anti-tumor immunity. Ultimately, we argue that defining the disease-specific translational states of leukemia and lymphoma is essential for the next generation of precision oncology, moving beyond genomic landscapes toward a proteomic-centered understanding of malignancy.