For example, whether our current findings from co-culture of ADSCs with MCF-7 (luminal type A) and MDA-MB-231 (basal type) occur in other molecular surrogates of breast cancer cells, such as luminal type B, HER2-overexpressing, or non-malignant mammary epithelial cells40, remain to be determined. Here, ERBB2 is linked to breast cancer.