3-D Spheroid of Cultivated Breast Cancer Cells (image) Helmholtz Zentrum München - German Research Center for Environmental Health Share Print E-Mail Caption Invasive cells show a light blue co-staining for the leptin receptor and a marker of epithelial-mesenchymal transition (i.e. the ability of cells to metastasize). Cell nuclei are stained in red. Credit Source: Helmholtz Zentrum München Usage Restrictions None 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.