tRNA dosage regulates lineage dependency and resistance in prostate cancer.

tRNA 1 Arg (UCU) regulates lineage transitions and therapy resistance in prostate cancer, with its expression levels influencing treatment sensitivity and disease progression.

• Why it matters: Understanding the mechanisms behind lineage plasticity is crucial because it underpins therapeutic resistance in cancer, yet the role of tRNA regulation in this process remains unclear.
• What they did: Researchers used small RNA sequencing to identify tRNA 1 Arg (UCU) as a key regulator, and investigated its regulation by DNA-binding proteins TARDBP and ZSCAN29, along with its impact on chromatin remodeling.
• The result: Downregulation of tRNA 1 Arg (UCU) correlates with aggressive neuroendocrine prostate cancer and poorer patient survival, revealing a novel tRNA-based axis that influences lineage fidelity and resistance.