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Updated: May 21, 2025

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Investigating the causal relationships between mitochondrial proteins and dementia with Lewy bodies

Jingna Ye1, Xuelian Dai1, Canwen Zhang2

  • 1Department of Neurology, Luoyang Center Hospital Affiliated to Zhengzhou University, Luoyang, China.

Journal of Alzheimer'S Disease : JAD
|March 20, 2025
PubMed

Insights

Mitochondrial proteins play a role in dementia with Lewy bodies (DLB). Some proteins increase DLB risk, while others, like GLRX-2, offer protection, suggesting new therapeutic targets.

Area of Science:

  • Neuroscience
  • Genetics
  • Biochemistry

Background:

  • Mitochondrial dysfunction is linked to neurodegenerative diseases.
  • The specific role of mitochondrial proteins in dementia with Lewy bodies (DLB) pathogenesis is unclear.

Purpose of the Study:

  • To investigate potential causal links between mitochondrial proteins and DLB risk.
  • Utilize Mendelian randomization (MR) to assess these relationships.

Main Methods:

  • MR analysis of 66 mitochondrial proteins (MPs) and DLB risk.
  • Employed genome-wide association studies (GWAS) data and various analytical methods.
  • Assessed heterogeneity and pleiotropy using Cochran's Q statistics and sensitivity analyses.

Main Results:

  • Increased levels of ES1 protein homolog and apoptosis-inducing factor 1 (AIF-1) were associated with higher DLB risk.
  • Elevated levels of glutaredoxin-2 (GLRX-2), C1QBP, and GC2 showed a protective effect against DLB.
  • Sensitivity analyses confirmed the robustness of the findings, with no significant heterogeneity or pleiotropy.

Conclusions:

  • Identified specific mitochondrial proteins causally linked to DLB risk.
  • These findings provide insights into MP-related mechanisms in DLB pathogenesis.
  • Highlights potential novel therapeutic targets for DLB.
Keywords:
Alzheimer's diseaseMendelian randomizationdementia with Lewy bodiesmitochondrial proteins

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