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Phenotypic Characterization of a Mouse Model of Juvenile Neuronal Ceroid Lipofuscinosis

Overview
Journal Neurobiol Dis
Specialty Neurology
Date 2007 Oct 27
PMID 17962032
Citations 21
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Abstract

Juvenile neuronal ceroid lipofuscinosis (JNCL) is an autosomal recessively inherited neurodegenerative disorder that results from mutations in the CLN3 gene. JNCL is characterized by accumulation of autofluorescent lysosomal storage bodies, vision loss, seizures, progressive cognitive and motor decline, and premature death. Studies were undertaken to characterize the neuronal ceroid lipofuscinosis phenotype in a Cln3 knockout mouse model. Progressive accumulation of autofluorescent storage material was observed in brain and retina of affected mice. The Cln3(-/-) mice exhibited progressively impaired inner retinal function, altered pupillary light reflexes, losses of inner retinal neurons, and reduced brain mass. Behavioral changes included reduced spontaneous activity levels and impaired learning and memory. In addition, Cln3(-/-) mice had significantly shortened life spans. These phenotypic features indicate that the mouse model will be useful for investigating the mechanisms underlying the disease pathology in JNCL and provide quantitative markers of disease pathology that can be used for evaluating the efficacies of therapeutic interventions.

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