YAP1 induces hepatocellular carcinoma via DNA demethylation rather than by canonical driver gene mutations.

YAP1 induces hepatocellular carcinoma through DNA demethylation, not canonical driver gene mutations, with widespread demethylation activating oncogenes in mouse models.

• Why it matters: Understanding mechanisms behind cancers lacking typical driver mutations is crucial for developing targeted therapies, especially for tumors driven by epigenetic changes rather than genetic mutations.
• What they did: Researchers used a mouse mosaic model to activate YAP1-TEAD in hepatocytes, performed whole-exome and bisulfite sequencing, and identified DNA demethylation and Tet1 involvement in tumor development.
• The result: Findings reveal the YAP1-TEAD-TET1 axis promotes liver cancer via epigenetic reprogramming, offering new avenues for diagnosis and treatment of mutation-negative hepatocellular carcinomas.