For the experiments, we selected the following breast cancer cell lines that can be assigned to different breast cancer subtypes, according to Dai et al. [27]: triple-negative A (MDA-MB-468), triple-negative B (MDA-MB-231), HER2-positive (SKBR-3), luminal A (MCF-7), and luminal B (BT-474). Here, ERBB2 is linked to breast carcinoma.