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Genetically Predicted Leucine Level Mediates Association Between CD4/CD8br T Lymphocytes and Insomnia
Sumei Luo1, Jianyin Yin1, Jie Zhang1
1Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, China.
Cellular and Molecular Neurobiology
|January 22, 2025
Summary
This study reveals a causal link between specific immune cells and metabolites in insomnia. Certain immune cell types and metabolites act as protective factors, while others increase insomnia risk, with leucine mediating one such relationship.
Area of Science:
- Immunology
- Metabolomics
- Sleep Science
- Genetics
Background:
- Immune and metabolic dysregulation are implicated in insomnia.
- Understanding the causal links between these factors and insomnia is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate the causal relationships between immune cell phenotypes, metabolites, and insomnia.
- To identify potential mediating roles of metabolites in the association between immune cells and insomnia.
Main Methods:
- Utilized two-way Mendelian randomization analysis.
- Employed genetic data from the GWAS open-access database for immune cell phenotypes (731), metabolites (1400), and insomnia.
Main Results:
- Identified eight immune cell phenotypes causally linked to insomnia; two were protective (CD8br %T cells, CD80 on myeloid dendritic cells) and six were risk factors.
- Revealed 11 metabolites causally related to insomnia; five were protective and six were risk factors.
- Found that leucine mediates the relationship between CD4/CD8br ratio and insomnia.
Conclusions:
- Confirmed genetic evidence for causal relationships between insomnia, specific immune cell phenotypes, and metabolite levels.
- Highlighted the mediating role of plasma metabolites, such as leucine, in the immune cell-insomnia axis.
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