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Chemical chaperone therapy: clinical effect in murine GM1-gangliosidosis



Certain low-molecular-weight substrate analogs act both as in vitro competitive inhibitors of lysosomal hydrolases and as intracellular enhancers (chemical chaperones) by stabilization of mutant proteins. In this study, we performed oral administration of a chaperone compound N-octyl-4-epi-β-valienamine to GM1-gangliosidosis model mice expressing R201C mutant human β-galactosidase. A newly developed neurological scoring system was used for clinical assessment. N-Octyl-4-epi-β-valienamine was delivered rapidly to the brain, increased β-galactosidase activity, decreased ganglioside GM1, and prevented neurological deterioration within a few months. No adverse effect was observed during this experiment. N-Octyl-4-epi-β-valienamine will be useful for chemical chaperone therapy of human GM1-gangliosidosis. Ann Neurol 2007

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