CDH1 and breast cancer: However, in GSCs integrin α6B and the mesenchymal markers neural cadherin (N-cadherin) and Slug are predominantly expressed, while integrin α6A and the epithelial marker E-cadherin are essentially absent [102], as it was the case in a previous study in breast cancer where integrin α6A was expressed in epithelial tumor cells and integrin α6B in mesenchymal tumor cells [150].