A bicyclic 1-deoxygalactonojirimycin derivative as a novel pharmacological chaperone for GM1 gangliosidosis

Tomoko Takai, Katsumi Higaki*, Matilde Aguilar-Moncayo, Teresa Mena-Barragán, Yuki Hirano, Kei Yura, Liang Yu, Haruaki Ninomiya, M. Isabel García-Moreno, Yasubumi Sakakibara, Kousaku Ohno, Eiji Nanba, Carmen Ortiz Mellet, José M. García Fernández, Yoshiyuki Suzuki

*この研究の対応する著者

研究成果: Article査読

55 被引用数 (Scopus)

抄録

Lysosomal β-galactosidase (β-Gal) deficiency causes a group of disorders that include neuronopathic GM1 gangliosidosis and non-neuronopathic Morquio B disease. We have previously proposed the use of small molecule ligands of β-Gal as pharmacological chaperones (PCs) for the treatment of GM1 gangliosidosis brain pathology. Although it is still under development, PC therapy has yielded promising preclinical results in several lysosomal diseases. In this study, we evaluated the effect of bicyclic 1-deoxygalactonojirimycin (DGJ) derivative of the sp2-iminosugar type, namely 5N,6S-(N′-butyliminomethylidene)-6-thio-1- deoxygalactonojirimycin (6S-NBI-DGJ), as a novel PC for human mutant β-Gal. In vitro, 6S-NBI-DGJ had the ability to inhibit the activity of human β-Gal in a competitive manner and was able to protect this enzyme from heat-induced degradation. Computational analysis supported that the rigid glycone bicyclic core of 6S-NBI-DGJ binds to the active site of the enzyme, with the aglycone N′-butyl substituent, in a precise E-orientation, located at a hydrophobic region nearby. Chaperone potential profiling indicated significant increases of enzyme activity in 24 of 88 β-Gal mutants, including four common mutations. Finally, oral administration of 6S-NBI-DGJ ameliorated the brain pathology of GM1 gangliosidosis model mice. These results suggest that 6S-NBI-DGJ is a novel PC that may be effective on a broad range of β-Gal mutants.

本文言語English
ページ(範囲)526-532
ページ数7
ジャーナルMolecular Therapy
21
3
DOI
出版ステータスPublished - 2013 3
外部発表はい

ASJC Scopus subject areas

  • 分子医療
  • 分子生物学
  • 遺伝学
  • 薬理学
  • 創薬

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