靶向给药是指药物选择地到达特定的生理部位、器官、组织或细胞 ,并在该靶部位发挥药物治疗作用。选择性给药可以增强药物在靶部位的活性并减少其在非靶部位的毒副作用 ,提高药物的治疗指数。靶向治疗研究的焦点是载体 ,寻找一种对肿瘤细胞有特异性的载体 ,将药物带到肿瘤部位 Targeted drug delivery refers to the selective arrival of a drug to a particular physiological site, organ, tissue or cell, and exerts its therapeutic effect on that target site. Selective administration can enhance the activity of the drug at the target site and reduce its toxic site-side effects and improve the therapeutic index of the drug. The focus of targeted therapy research is vectors, looking for a carrier that is specific for tumor cells, bringing the drug to the tumor site