Mouse Neurogenesis (image) Cell Press Share Print E-Mail Caption One month old newly born neurons in the dentate gyrus of the adult mouse hippocampus were labeled by injection of retrovirus expressing green-fluorescent-protein (GFP). The photomicrograph shows GFP expressing new neurons and the nuclei of the granule cell layer labeled with DAPI (blue). The production of newly born neurons is upregulated by voluntary wheel running in mice. Credit Henriette van Praag and Linda Kitabayashi Usage Restrictions Credit Required. Share Print E-Mail 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.