(IMAGE) University of Pennsylvania Caption Using gene therapy to augment normal levels of the RPGR gene resulted in long-term rescue of photoreceptors within the retinal region of gene therapy injection, but not within the control injection. The rescue lasted at least 2.5 years when the disease was treated in its later stages. Credit University of Pennsylvania Usage Restrictions In context of reporting License Licensed 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.