Gene Therapy in Mouse Heart (IMAGE) Duke University Caption This cross-section of a mouse heart (red) shows how well the gene therapy delivered sodium ion channel genes (cyan) to the target heart cells after researchers injected a virus with the genes into the mouse veins. Credit Tianyu Wu, Duke University Usage Restrictions None 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.