恩美曲妥珠单抗(T-DM1)是曲妥珠单抗、连接头和微管抑制剂组成的抗体偶合物。T-DM1结合了抗体的高效靶向性与细胞毒性药物的高抗肿瘤活性优势，降低了细胞毒性药物的脱靶不良反应。T-DM1应用于人表皮生长因子受体2(HER-2)阳性乳腺癌的新辅助治疗和晚期乳腺癌的解救治疗，极大地改善了乳腺癌患者的预后。越来越多有关T-DM1治疗HER-2阳性乳腺癌及其他实体瘤的临床试验正在开展，期待有更多的阳性结果。“,”Ado-trastuzumab emtansine (T-DM1) is an antibody-drug conjugate (ADC) composed of trastuzumab, a linker, and a microtubule inhibitor. T-DM1 combines the highly effective targeting of antibody with the high anti-tumor activity of cytotoxic drugs, while reduces the off-target toxic side effects of cytotoxic drugs. T-DM1 has been applied in neoadjuvant therapy of HER2-positive breast cancer and rescue treatment of advanced breast cancer, greatly improves the prognosis of breast cancer patients. More and more clinical trials of T-DM1 for HER2 breast cancer and other solid tumors are ongoing, and more positive results are expected.