Next Generation Gene Therapy (image) University of Pennsylvania School of Medicine Caption Green fluorescent protein in photoreceptors and retinal pigment epithelial cells after subretinal injection of AAV8 in a monkey retina. Cell nuclei are labeled blue and cone photoreceptors are labeled red. Credit Luk Vandenberghe, Ph.D., Perelman School of Medicine at the University of Pennsylvania Usage Restrictions None 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.