靶向治疗对肿瘤细胞的杀伤力强,不良反应少,在癌症治疗中发挥着重要作用.由于叶酸受体是高选择性的肿瘤标志物,其在许多肿瘤细胞表面均过度表达,通过叶酸受体介导的内吞作用将抗肿瘤药物靶向传递至肿瘤组织或细胞,提高了抗癌药物的治疗指数,目前叶酸受体靶向递药技术已受到广泛关注.而其中利用高分子为载体,偶联靶向配体叶酸和抗肿瘤药物形成的高分子偶联药物,能显著延长药物的半衰期,增加药物的稳定性和溶解性,降低药物的毒副作用,使叶酸高分子偶联药物具有良好的应用前景.本文就目前各类叶酸受体介导的高分子抗肿瘤药物进行综述.%Targeted therapies for cancer have many advantages, such as strong harmful effects on tumor cell and low adverse effect. Due to the fact that the folate receptor is a highly selective tumor marker overexpressed on the surface of many cancer cells, antitumor agents are targetedly delivered to tumor tissues or cells via endocytosis mediated by folate receptor to improve the therapeutic efficiency. At present, the technology of folate receptor targeting drug delivery attracts extensive attention. Folate-targeted polymer-anti-tumor drug conjugates, which use polymer as the carrier coupling the targeting ligand folic acid and anticancer drugs, can significantly extend the drug half-life, increase drug stability and solubility, and reduce the side effects of drugs remarkably. All these characteristics indicate that folic acid polymer-drug conjugates have a good application prospect. This review covers the various types of folate receptor-mediated polymeric antitumer drugs conjugates, with special emphasis on the more recent ones and their mechanism aspects.
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