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Common Variants Near ZIC1 and ZIC4 in Autopsy-Confirmed Multiple System Atrophy.

Franziska Hopfner1, Anja K Tietz2, Viktoria C Ruf3

  • 1Department of Neurology Hannover Medical School, Hannover, Germany.

Movement Disorders : Official Journal of the Movement Disorder Society
|August 23, 2022
PubMed
Summary
This summary is machine-generated.

This study identified genetic markers associated with Multiple System Atrophy (MSA) in autopsy-confirmed cases. Reduced ZIC4 expression in MSA subtypes suggests a potential role in neurodegeneration.

Keywords:
ZIC1ZIC4autopsy-confirmedgenome-wide association studymultiple system atrophy

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Area of Science:

  • Neuroscience
  • Genetics
  • Pathology

Background:

  • Multiple System Atrophy (MSA) is a rare, fatal neurodegenerative disorder characterized by alpha-synuclein aggregation.
  • MSA presents with autonomic dysfunction, parkinsonism, and cerebellar ataxia, often leading to misdiagnosis due to overlapping symptoms with other neurological conditions.

Purpose of the Study:

  • To identify genetic predisposing factors for Multiple System Atrophy (MSA) by analyzing common genetic variations.
  • To investigate the role of ZIC4 in the neuropathology of MSA subtypes using immunohistochemical analysis.

Main Methods:

  • Genome-wide association study (GWAS) on 731 autopsy-confirmed Multiple System Atrophy (MSA) cases and 2898 controls.
  • Immunohistochemical analysis of ZIC4 expression in brain tissue from 24 MSA patients and controls.

Main Results:

  • Significant association of genetic markers rs16859966 (chromosome 3), rs7013955 (chromosome 8), and rs116607983 (chromosome 4) with MSA.
  • ZIC1 and ZIC4 genes, located near the chromosome 3 locus, were identified as potential candidates.
  • Reduced ZIC4-immunoreactive neurons observed in the olivopontocerebellar atrophy subtype of MSA compared to controls and striatonigral degeneration subtype.

Conclusions:

  • Genetic variations, particularly near the ZIC1/ZIC4 locus, are associated with Multiple System Atrophy (MSA).
  • Decreased ZIC4 expression in specific MSA subtypes suggests its potential involvement in neuronal vulnerability and disease pathogenesis.