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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
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.
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.
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