A large-scale genetic correlation scan identified the plasma proteins associated with brain function related traits

Area of Science:

• Genetics
• Neuroscience
• Biochemistry

Background:

• Insomnia, intelligence, and neuroticism are key brain-regulated traits.
• Understanding their genetic underpinnings is crucial for neurological and psychiatric research.
• Human plasma proteins are potential biomarkers for various physiological and pathological states.

Purpose of the Study:

• To investigate the genetic correlations between human plasma proteins and brain function-related traits.
• To identify specific plasma proteins associated with insomnia, intelligence, and neuroticism.
• To uncover shared genetic links between these traits and plasma proteins.

Main Methods:

• Genome-wide association study (GWAS) summary statistics for over 3000 plasma proteins were utilized.
• Linkage Disequilibrium Score (LDSC) regression analysis was performed to estimate genetic correlations.
• Statistical significance thresholds were applied to identify relevant genetic associations.

Main Results:

• LDSC analysis revealed significant genetic correlations between specific plasma proteins and the studied brain traits.
• 18 proteins were associated with insomnia (e.g., Periostin), 21 with intelligence (e.g., Ecto-ADP-ribosyltransferase 3), and 6 with neuroticism (e.g., CD70 antigen).
• Shared proteins were identified between insomnia and intelligence (e.g., Periostin, Neurexin-1), and between intelligence and neuroticism (e.g., CD70 antigen).

Conclusions:

• The study identifies novel genetic relationships between plasma proteins and key brain functions.
• These findings contribute to understanding the biological mechanisms linking peripheral proteins to central nervous system traits.
• The identified proteins may serve as potential targets for future research in brain health and dysfunction.