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A specific and potent inhibitor of glucosylceramide synthase for substrate inhibition therapy of Gaucher disease.

Abstract：

:An approach to treating Gaucher disease is substrate inhibition therapy which seeks to abate the aberrant lysosomal accumulation of glucosylceramide. We have identified a novel inhibitor of glucosylceramide synthase (Genz-112638) and assessed its activity in a murine model of Gaucher disease (D409V/null). Biochemical characterization of Genz-112638 showed good potency (IC(50) approximately 24nM) and specificity against the target enzyme. Mice that received drug prior to significant accumulation of substrate (10 weeks of age) showed reduced levels of glucosylceramide and number of Gaucher cells in the spleen, lung and liver when compared to age-matched control animals. Treatment of older mice that already displayed significant amounts of tissue glucosylceramide (7 months old) resulted in arrest of further accumulation of the substrate and appearance of additional Gaucher cells in affected organs. These data indicate that substrate inhibition therapy with Genz-112638 represents a viable alternate approach to enzyme therapy to treat the visceral pathology in Gaucher disease.

journal_name

Mol Genet Metab

journal_title

Molecular genetics and metabolism

authors

McEachern KA,Fung J,Komarnitsky S,Siegel CS,Chuang WL,Hutto E,Shayman JA,Grabowski GA,Aerts JM,Cheng SH,Copeland DP,Marshall J

doi

10.1016/j.ymgme.2007.04.001

subject

Has Abstract

pub_date

2007-07-01 00:00:00

pages

259-67

issue

3

eissn

1096-7192

issn

1096-7206

pii

S1096-7192(07)00125-4

journal_volume

91

pub_type

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