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- W2012044322 abstract "<h3>Objective:</h3> To provide clinical data on a cohort of 6 patients with massive expansion (>200 CAG repeats) of spinocerebellar ataxia type 2 (SCA2) and investigate possible pathways of pathogenesis using bioinformatics analysis of ATXN2 networks. <h3>Methods:</h3> We present data on 6 patients with massive expansion of SCA2 who presented in infancy with variable combinations of hypotonia, global developmental delay, infantile spasms, and retinitis pigmentosa. ATXN2 is known to interact with a network of synaptic proteins. To investigate pathways of pathogenesis, we performed bioinformatics analysis on <i>ATXN2</i> combined with known genes associated with infantile spasms, retinitis pigmentosa, and synaptic function. <h3>Results:</h3> All patients had a progressive encephalopathy with autonomic dysfunction, 4 had retinitis pigmentosa, and 3 had infantile spasms. The bioinformatics analysis led to several interesting findings. First, an interaction between ATXN2 and SYNJ1 may account for the development of retinitis pigmentosa. Second, dysfunction of postsynaptic vesicle endocytosis may be important in children with this progressive encephalopathy. Infantile spasms may be associated with interactions between ATXN2 and the postsynaptic structural proteins MAGI2 and SPTAN1. <h3>Conclusions:</h3> Severe phenotype in children with massive expansion of SCA2 may be due to a functional deficit in protein networks in the postsynapse, specifically involving vesicle endocytosis." @default.
- W2012044322 created "2016-06-24" @default.
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- W2012044322 date "2011-08-31" @default.
- W2012044322 modified "2023-09-26" @default.
- W2012044322 title "Massive expansion of SCA2 with autonomic dysfunction, retinitis pigmentosa, and infantile spasms" @default.
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- W2012044322 doi "https://doi.org/10.1212/wnl.0b013e31822e5627" @default.
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