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SHC2 gene copy number in multiple system atrophy (MSA).

Marcus C Ferguson1, Emily M Garland, Lora Hedges

  • 1Autonomic Dysfunction Center, Department of Medicine, Vanderbilt University, AA3228 Medical Center North, Nashville, TN, 37232-2195, USA, marcus.ferguson@vanderbilt.edu.

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Summary

SHC2 gene deletions are not a common cause of Multiple System Atrophy (MSA) in the US population. This contrasts with Japanese findings, suggesting genetic differences in MSA.

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Area of Science:

  • Neurodegenerative diseases
  • Genetics
  • Neuroscience

Background:

  • Multiple system atrophy (MSA) is a progressive neurodegenerative disorder characterized by autonomic failure and motor symptoms.
  • The pathology of MSA involves alpha-synuclein aggregates in glial cytoplasmic inclusions, classifying it as an alpha-synucleinopathy.
  • Previous research suggested a link between SHC2 gene deletions and MSA in Japanese individuals.

Purpose of the Study:

  • To investigate the role of SHC2 gene copy number variation in a US cohort of Multiple System Atrophy (MSA) patients.
  • To determine if heterozygous SHC2 gene deletions contribute to MSA in the American population.

Main Methods:

  • Studied 105 well-characterized MSA patients and 5 control subjects.
  • Utilized TaqMan Gene Copy Number Assays to quantify SHC2 gene copy number in two distinct segments.

Main Results:

  • All 105 MSA subjects in the US cohort consistently showed two copies of both tested SHC2 gene segments.
  • No evidence of SHC2 gene deletions was found in the studied American MSA population.

Conclusions:

  • SHC2 gene deletions appear to be a rare cause of well-characterized MSA in the US.
  • The findings suggest genetic heterogeneity of MSA across different populations, contrasting with previous Japanese studies.