Genetics, Mechanisms, and Therapeutic Progress in Polyglutamine Spinocerebellar Ataxias


Autosomal dominant cerebellar ataxias (ADCAs) are a group of neurodegenerative disorders characterized by degeneration of the cerebellum and its connections. All ADCAs have progressive ataxia as their main clinical feature, frequently accompanied by dysarthria and oculomotor deficits. The most common spinocerebellar ataxias (SCAs) are 6 polyglutamine (polyQ) SCAs. These diseases are all caused by a CAG repeat expansion in the coding region of a gene. Currently, no curative treatment is available for any of the polyQ SCAs, but increasing knowledge on the genetics and the pathological mechanisms of these polyQ SCAs has provided promising therapeutic targets to potentially slow disease progression. Potential treatments can be divided into pharmacological and gene therapies that target the toxic downstream effects, gene therapies that target the polyQ SCA genes, and stem cell replacement therapies. Here, we will provide a review on the genetics, mechanisms, and therapeutic progress in polyglutamine spinocerebellar ataxias.

Authors Buijsen RAM, Toonen LJA, Gardiner SL, van Roon-Mom WMC
Journal Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics
Publication Date 2019 Apr;16(2):263-286
PubMed 30607747
PubMed Central PMC6554265
DOI 10.1007/s13311-018-00696-y

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