A Fluorescent sp2-Iminosugar With Pharmacological Chaperone Activity for Gaucher Disease: Synthesis and Intracellular Distribution Studies
作者:Zhuo Luan、Katsumi Higaki、Matilde Aguilar-Moncayo、Linjing Li、Haruaki Ninomiya、Eiji Nanba、Kousaku Ohno、M. Isabel García-Moreno、Carmen Ortiz Mellet、José M. García Fernández、Yoshiyuki Suzuki
DOI:10.1002/cbic.201000323
日期:2010.11.22
Bicyclic nojirimycin (NJ) derivatives of the sp2‐iminosugar type, including 6S‐NOI‐NJ, are selective competitive inhibitors of the lysosomal β‐Glu and exhibit chaperoneactivities for several Gaucherdisease mutations. We have synthesized a fluorescent analogue and shown that it accumulates in lysosome‐related organelles in both normal and GD fibroblasts.
Fluorescent-tagged sp2-iminosugars with potent β-glucosidase inhibitory activity
作者:Matilde Aguilar-Moncayo、M. Isabel García-Moreno、Arnold E. Stütz、José M. García Fernández、Tanja M. Wrodnigg、Carmen Ortiz Mellet
DOI:10.1016/j.bmc.2010.09.003
日期:2010.11
New fluorescently-labelled sp(2)-iminosugars based on the 5N,6S-[N'-(4-aminobutyl)iminomethylidene]-6-thionojirimycin skeleton have been synthesized as photoprobes to monitor glycosidase binding. Dansyl, dapoxyl and coumarin fluorophores were appended to the terminal amino group at the N'-substituent by either sulfonamide or amide bridging reaction. All the conjugates behaved as strong (low micromolar to nanomolar) and selective inhibitors of beta-glucosidases (almonds and bovine liver) and naringinase, in agreement with the inhibition pattern previously encountered for related iso(thio)urea-type bicyclic sp(2)-iminosugars. The presence of the fluorescent probe allows real-time and continuous monitoring of beta-glucosidase inhibition by fluorescence resonance energy transfer (FRET), taking advantage of the intrinsic tryptophan-associated fluorescence of the protein. (C) 2010 Elsevier Ltd. All rights reserved.