Design, synthesis and biological evaluation of carbohydrate-functionalized cyclodextrins and liposomes for hepatocyte-specific targeting
作者:Gonçalo J. L. Bernardes、Raghavendra Kikkeri、Maha Maglinao、Paola Laurino、Mayeul Collot、Sung You Hong、Bernd Lepenies、Peter H. Seeberger
DOI:10.1039/c0ob00372g
日期:——
Targeting glycan-binding receptors is an attractive strategy for cell-specific drug and gene delivery. The C-type lectin asialoglycoprotein receptor (ASGPR) is particularly suitable for liver-specific delivery due to its exclusive expression by parenchymal hepatocytes. In this study, we designed and developed an efficient synthesis of carbohydrate-functionalized β-cyclodextrins (βCDs) and liposomes for hepatocyte-specific delivery. For targeting of ASGPR, rhodamine B-loaded βCDs were functionalized with glycodendrimers. Liposomes were equipped with synthetic glycolipids containing a terminal D-GalNAc residue to mediate binding to ASGPR. Uptake studies in the human hepatocellular carcinoma cell line HepG2 demonstrated that βCDs and liposomes displaying terminal D-Gal/D-GalNAc residues were preferentially endocytosed. In contrast, uptake of βCDs and liposomes with terminal D-Man or D-GlcNAc residues was markedly reduced. The D-Gal/D-GalNAc-functionalized βCDs and liposomes presented here enable hepatocyte-specific targeting. Gal-functionalized βCDs are efficient molecular carriers to deliver doxorubicin in vitro into hepatocytes and induce apoptosis.
针对糖结合受体的策略在细胞特异性药物和基因传递中具有吸引力。C型凝集素脱唾液酸糖蛋白受体(ASGPR)由于其仅由实质性肝细胞表达,特别适合于肝脏特异性传递。在本研究中,我们设计并开发了一种高效的碳水化合物功能化β-环糊精(βCDs)和脂质体的合成方法,用于肝细胞特异性传递。为了针对ASGPR进行靶向,罗丹明B负载的βCDs通过糖树枝状聚合物进行功能化。脂质体配备含有末端D-GalNAc残基的合成糖脂,以介导与ASGPR的结合。在人肝细胞癌细胞系HepG2中的摄取研究表明,显示末端D-Gal/D-GalNAc残基的βCDs和脂质体优先被内吞。相比之下,具有末端D-Man或D-GlcNAc残基的βCDs和脂质体的摄取明显减少。这里展示的D-Gal/D-GalNAc功能化的βCDs和脂质体实现了肝细胞特异性靶向。Gal功能化的βCDs是有效的分子载体,能够在体外将多柔比星传递到肝细胞并诱导凋亡。