Breast epithelial Cells (IMAGE) Cold Spring Harbor Laboratory Caption Cold Spring Harbor Laboratory Associate Professor Camila dos Santos’ lab discovered that after pregnancy, breast cells call in specialized immune cells called Natural Killer T (NKT) cells to prevent tumors from arising. This image shows mouse breast epithelial cells (red and magenta) after a pregnancy. The cells are calling in NKT cells (green, pointed out with white arrows) to kill any epithelial cells that may become cancerous Credit Hanasoge Somasundara/dos Santos lab/CSHL, 2021 Usage Restrictions Attribution required License Original 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.