β-Galactosidase-deficient mouse as an animal model for GM1-gangliosidosis
- 1 January 1997
- journal article
- Published by Springer Science and Business Media LLC in Glycoconjugate Journal
- Vol. 14 (6), 729-736
- https://doi.org/10.1023/a:1018573518127
Abstract
GM1-gangliosidosis is a progressive neurological disease in humans caused by deficiency of lysosomal acid β-galactosidase, which hydrolyses the terminal β-galactosidic residue from ganglioside GM1 and other glycoconjugates. In this study, we generated a mouse model for GM1-gangliosidosis by gene targeting in embryonic stem cells. The mouse homozygous for the disrupted β-galactosidase gene showed β-galactosidase deficiency, presented with progressive spastic diplegia, and died of emaciation at 7–10 months of age. Pathologically, PAS-positive intracytoplasmic storage was observed in neuronal cells of various areas in the brain. Biochemical analysis revealed a marked accumulation of ganglioside GM1 and asialo GM1 in brain tissue. This animal model will be useful for pathogenetic analysis and therapeutic trial of human GM1-gangliosidosis.Keywords
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