Photoreceptors and Amacrine cells (IMAGE) NIH/National Eye Institute Caption Amacrine and photoreceptor cells treated with PEDF in culture. PEDF stimulated extensive amacrine axonal outgrowth and protected photoreceptors from cell death, simultaneously promoting their differentiation. Cell nuclei are labeled in red, and cellular skeleton in green. Credit Patricia Becerra, NEI Usage Restrictions With credit 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.