A Multivalent Ligand for the Mannose-6-Phosphate Receptor for Endolysosomal Targeting of an Activity-Based Probe
作者:Sascha Hoogendoorn、Gijs H. M. van Puijvelde、Johan Kuiper、Gijs A. van der Marel、Herman S. Overkleeft
DOI:10.1002/anie.201406842
日期:2014.10.6
expressed mannose‐6‐phosphate receptors (MPRs) are a promising class of receptors for targeted compound delivery into the endolysosomal compartments of a variety of cell types. The development of a synthetic, multivalent, mannose‐6‐phosphate (M6P) glycopeptide‐based MPR ligand is described. The conjugation of this ligand to fluorescent DCG‐04, an activity‐based probe for cysteine cathepsins, enabled
普遍表达的甘露糖6磷酸受体(MPR)是一类有前途的受体,可将化合物靶向递送到各种细胞类型的溶酶体区室中。描述了合成,多价,基于甘露糖-6-磷酸(M6P)糖肽的MPR配体的开发。该配体与荧光DCG-04(一种基于活性的半胱氨酸组织蛋白酶的探针)的缀合使得能够荧光读取其受体靶向特性。结果表明,所得的M6P-簇–BODIPY–DCG-04探针可有效标记细胞裂解液和活细胞中的组织蛋白酶。此外,引入了6- O与含甘露糖的配体相比,磷酸酯可导致COS和树突状细胞的摄取谱完全改变。与甘露糖-6-磷酸的竞争消除了探针在COS细胞中的所有摄取,我们得出的结论是,甘露糖-6-磷酸簇以MPR为靶标,并确保将与簇结合的货物靶向递送至溶酶体途径。