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Related Experiment Video

Updated: Jun 13, 2025

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Clonal hematopoiesis with DNMT3A mutations is associated with multiple system atrophy.

Seungmin Lee1, Han-Joon Kim1, Seoyeon Kim1

  • 1Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.

Parkinsonism & Related Disorders
|September 15, 2024
PubMed
Summary

Clonal hematopoiesis of indeterminate potential (CHIP) is linked to multiple system atrophy (MSA). DNMT3A mutations, a marker of CHIP, were more prevalent in MSA patients, suggesting a potential connection.

Keywords:
Clonal hematopoiesisDNMT3AMultiple system atrophy

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Area of Science:

  • Neuroscience
  • Genetics
  • Hematology

Background:

  • Clonal hematopoiesis of indeterminate potential (CHIP) is linked to cardiovascular and other disorders, potentially through inflammation.
  • Emerging evidence suggests a connection between CHIP and neurodegenerative diseases.

Purpose of the Study:

  • To investigate the association between multiple system atrophy (MSA) and CHIP.

Main Methods:

  • Targeted sequencing of 25 common CHIP genes in 100 MSA patients and 4457 controls.
  • Assessed CHIP prevalence at variant allele frequency (VAF) thresholds of 1.5% and 2.0%.

Main Results:

  • DNMT3A mutation rates were significantly higher in MSA patients at a 1.5% VAF threshold.
  • This association remained significant after adjusting for age and sex (aOR=1.848, p=0.0416).

Conclusions:

  • The study suggests a significant association between DNMT3A mutations and multiple system atrophy (MSA).
  • This finding may indicate a role for CHIP in the pathogenesis of MSA.