Dystonia and cerebellar degeneration in the leaner mouse mutant

Brain Research
Robert S RaikeH A Jinnah

Abstract

Cerebellar degeneration is traditionally associated with ataxia. Yet, there are examples of both ataxia and dystonia occurring in individuals with cerebellar degeneration. There is also substantial evidence suggesting that cerebellar dysfunction alone may cause dystonia. The types of cerebellar defects that may cause ataxia, dystonia, or both have not been delineated. In the current study, we explored the relationship between cerebellar degeneration and dystonia using the leaner mouse mutant. Leaner mice have severe dystonia that is associated with dysfunctional and degenerating cerebellar Purkinje cells. Whereas the density of Purkinje cells was not significantly reduced in 4 week-old leaner mice, approximately 50% of the neurons was lost by 34 weeks of age. On the other hand, the dystonia and associated functional disability became significantly less severe during this same interval. In other words, dystonia improved as Purkinje cells were lost, suggesting that dysfunctional Purkinje cells, rather than Purkinje cell loss, contribute to the dystonia. These results provide evidence that distorted cerebellar function may cause dystonia and support the concept that different types of cerebellar defects can have different function...Continue Reading

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Citations

Sep 16, 2015·Human Molecular Genetics·Corinne E Weisheit, William T Dauer
Sep 2, 2016·Scientific Reports·Simone E HieberBert Müller
Oct 14, 2016·The Cerebellum·Vikram G ShakkottaiPeter L Strick
May 11, 2018·Current Opinion in Neurology·Tommaso SchirinziAntonio Pisani

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