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Cerebellar pathology and motor deficits in the palmitoyl protein thioesterase 1-deficient mouse.

by: Shannon L. Macauley, David F. Wozniak, Catherine Kielar, Yun Tan, Jonathan D. Cooper, Mark S. Sands
Experimental neurology, Vol. 217, No. 1. (May 2009), pp. 124-135, doi:10.1016/j.expneurol.2009.01.022  Key: citeulike:4502980

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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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