MicroRNA-22 Slides (IMAGE) University of California - Davis Health Caption Ying Hu holds a slide with tissue samples. Gene therapy with microRNA-22 produced better survival outcomes than the current FDA-approved drug for liver cancer and without noticeable toxicity in new mouse study. Credit UC Davis Health. Usage Restrictions For reprint purposes only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.