403-EcDNA Variants Drive Oncogenic Transcript Amplification

Paper Talk · Jan 17, 2026 · 15m

This research explores how extrachromosomal DNA (ecDNA) functions as a primary catalyst for gene fusions and oncogene amplification in various human cancers. The study identifies that ecDNA-borne fusions, particularly those involving the PVT1 lncRNA, significantly enhance the stability of oncogenic transcripts like MYC. Mechanistically, the PVT1 exon 1 segment binds to the protein SRSF1, allowing the resulting fusion RNA to evade standard cellular degradation pathways. This interaction increases the half-life of cancer-driving messages, leading to higher protein levels and increased tumor…