Bharati Vidyapeeth's College of Pharmacy, Mumbai, India.
Nanomedicine. 2010 Dec;6(6):714-29. doi: 10.1016/j.nano.2010.05.005. Epub 2010 Jun 11.
A plethora of formulation techniques have been reported in the literature for targeting drugs to specific sites. Polymeric micelles (PMs) can be targeted to tumor sites by passive as well as active mechanisms. Some inherent properties of PMs, including size in the nanorange, stability in plasma, longevity in vivo, and pathological characteristics of tumor allow PMs to be targeted to the tumor site by a passive mechanism called the enhanced permeability and retention effect. PMs formed from an amphiphilic block copolymer are suitable for encapsulation of poorly water-soluble, hydrophobic anticancer drugs. Other characteristics of PMs such as separate functionality at the outer shell are useful for targeting the anticancer drug to tumor by active mechanisms. PMs can be conjugated with many ligands such as antibody fragments, epidermal growth factors, α(2)-glycoprotein, transferrin, and folate to target micelles to cancer cells. Application of heat or ultrasound are the alternative methods to enhance drug accumulation in tumoral cells. Targeting using micelles can also be directed toward tumor angiogenesis, which is a potentially promising target for anticancer drugs. PMs have been used for the delivery of many anticancer agents in preclinical and clinical studies. This review summarizes recently available information regarding targeting of anticancer drugs to the tumor site using PMs.
已有大量文献报道了用于将药物靶向递送至特定部位的制剂技术。通过被动和主动机制,聚合物胶束(PMs)可靶向肿瘤部位。PMs 的一些固有特性,包括纳米级大小、在血浆中的稳定性、体内的持久性以及肿瘤的病理特征,使 PMs 能够通过称为增强通透性和保留效应的被动机制靶向肿瘤部位。由两亲嵌段共聚物形成的 PMs 适合包封疏水性差的抗癌药物。PMs 的其他特性,如外壳的单独功能,对于通过主动机制将抗癌药物靶向肿瘤是有用的。PMs 可以与许多配体(如抗体片段、表皮生长因子、α(2)-糖蛋白、转铁蛋白和叶酸)缀合,将胶束靶向癌细胞。应用热或超声是增强肿瘤细胞中药物积累的替代方法。使用胶束进行靶向也可以针对肿瘤血管生成,这是抗癌药物的一个潜在有前途的靶点。PMs 已在临床前和临床研究中用于递送多种抗癌药物。本综述总结了最近关于使用 PMs 将抗癌药物靶向递送至肿瘤部位的可用信息。
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