Causal relationship between immune cells and neurodegenerative diseases: a two-sample Mendelian randomisation study

Area of Science:

• Immunology
• Neuroscience
• Genetics

Background:

• Growing evidence links immune cell types to neurodegenerative diseases.
• Causal relationships between immune cells and neurodegeneration remain unclear.

Purpose of the Study:

• To determine the causal relationship between immune cell features and neurodegenerative diseases.
• Utilize Mendelian randomization to investigate causality.

Main Methods:

• Two-sample Mendelian randomization analysis.
• Utilized GWAS data for 731 immune cell features and four neurodegenerative diseases: Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and multiple sclerosis (MS).
• Employed multiple MR methods and strict instrumental variable selection criteria.

Main Results:

• Identified potential causal links between specific immune cells and neurodegenerative diseases.
• Found 8 immune cell types associated with AD, 1 with PD, 6 with ALS, and 6 with MS.
• Confirmed specific immune cell types causally influence the risk of these conditions.

Conclusions:

• Genetically demonstrated causal associations between immune cells and AD, PD, ALS, and MS.
• Findings provide valuable insights for future clinical research and therapeutic strategies.
• Highlights the critical role of specific immune cell types in neurodegeneration.