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Cerebellar Pathology and Motor Deficits in the Palmitoyl Protein Thioesterase 1-deficient Mouse

Overview
Journal Exp Neurol
Specialty Neurology
Date 2009 May 7
PMID 19416667
Citations 46
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Abstract

Infantile neuronal ceroid lipofuscinosis (INCL, Infantile Batten Disease) is an inherited, neurodegenerative lysosomal storage disorder. INCL is the result of a CLN1 gene mutation leading to a deficiency in palmitoyl protein thioesterase 1 (PPT1) activity. Studies in the forebrain demonstrate the PPT1-deficient mouse (PPT1-/-) mimics the clinical symptoms and underlying pathology of INCL; however, little is known about changes in cerebellar function or pathology. In this study, we demonstrate Purkinje cell loss beginning at 3 months, which correlates with changes in rotarod performance. Concurrently, we observed an early stage reactive gliosis and a primary pathology in astrocytes, including changes in S100beta and GLAST expression. Conversely, there was a late stage granule cell loss, microglial activation, and demyelination. This study suggests that neuronal-glial interactions are the core pathology in the PPT1-/- cerebellum. In addition, these data identify potential endpoints for use in future efficacy studies for the treatment of INCL.

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