ERBB2 and breast cancer: For instance, the conjugation of the anti-human epidermal receptor 2 (HER2) monoclonal antibody (A. Her2) with the nanocarrier PMBN (poly [MPC-co-(BMA)-co (MEONP)]), followed by the loading of GA-A, has been demonstrated to enhance the inhibitory effect on the proliferation of HER2-overexpressing breast cancer cells [48].