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Chaperone effect of sulfated disaccharide from heparin on mutant iduronate-2-sulfatase in mucopolysaccharidosis type II.

Abstract：

:Small molecules called pharmacological chaperones have been shown to improve the stability, intracellular localization, and function of mutated enzymes in several lysosomal storage diseases, and proposed as promising therapeutic agents for them. However, a chaperone compound for mucopolysaccharidosis type II (MPS II), which is an X-linked lysosomal storage disorder characterized by a deficiency of iduronate-2-sulfatase (IDS) and the accumulation of glycosaminoglycans (GAGs), has still not been developed. Here we focused on the Δ-unsaturated 2-sulfouronic acid-N-sulfoglucosamine (D2S0), which is a sulfated disaccharide derived from heparin, as a candidate compound for a pharmacological chaperone for MPS II, and analyzed the chaperone effect of the saccharide on IDS by using recombinant protein and cells expressing mutated enzyme. When D2S0 was incubated with recombinant human IDS (rhIDS) in vitro, the disaccharide attenuated the thermal degeneration of the enzyme. This effect of D2S0 on the thermal degeneration of rhIDS was enhanced in a dose-dependent manner. D2S0 also increased the residual activity of mutant IDS in patient fibroblasts. Furthermore, D2S0 improved the enzyme activity of IDS mutants derived from six out of seven different mutations in HEK293T cells transiently expressing them. These results indicate that D2S0 is a potential pharmacological chaperone for MPS II.

journal_name

Mol Genet Metab

journal_title

Molecular genetics and metabolism

authors

Hoshina H,Shimada Y,Higuchi T,Kobayashi H,Ida H,Ohashi T

doi

10.1016/j.ymgme.2017.12.428

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

118-122

issue

2

eissn

1096-7192

issn

1096-7206

pii

S1096-7192(17)30658-3

journal_volume

123

pub_type

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