Recently, harmine was found to synergize with the anthracycline doxorubicin in the breast cancer cell line MCF-7 [28] and harmine-mediated inhibition of DYRK1A destabilized epidermal growth factor receptor (EGFR) in aggressive glioblastomas and reduced EGFR-dependent glioblastoma growth [29]. Here, DYRK1A is linked to breast cancer.