Table 2

- Food and Drug Administration approved breast cancer targeted therapy.

Platform therapiesClinical characteristics of patients being curedMechanisms of actionSources
Everolimus (Afinitor®)Postmenopausal women with advanced hormone receptor positive, Her-2 negative BC in combination with exemestaneProtein kinase inhibitor of the mTOR serine/threonine kinase signal transduction pathway. The mTOR is deregulated in cancer.61
Bevacizumab (Avastin®)MBCMonoclonal antibody against VEGF-A which is the key molecule in blood vessel formation and tumor-induced immunosuppression.62
Ado-trastuzumab emtansine (KADCYLA)Her-2 positive early to MBCHer-2-targeted antibody-drug conjugate containing the humanized anti-HER-2 IgG1, trastuzumab, covalently linked to the microtubule inhibitory drug DM1, which is a maytansine derivative via the stable thioether linker MCC63
Tucatinib (Tukysa®) This is the most recent FDA approved targeted therapy (approved in 2020)Her-2 positive MBCSelective reversible Her-2 inhibitor that is applied either as monotherapy or in combination with chemotherapy and trastuzumab64
Toremifene (Acapodene, Fareston®)Postmenopausal women with ER positive or if the ER status is unknownThis is chlorinated tamoxifen analogue which competes with estradiol for ER and has growth inhibitory effects.66

FDA: Food and Drug Administration, ER: estrogen, BC: breast cancer, Her-2: human epidermal factor, mTOR: mammalian target of rapamycin, MBC: metastatic breast cancer, VEGF-A: vascular endothelial growth factor-A, DM1: derivative of maysantine1, MCC: maleimidomethyl cyclohexane-1-carboxylate