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A Large-Scale Genetic Correlation Scan Between Intelligence and Brain Imaging Phenotypes.

Shiqiang Cheng1, Cuiyan Wu1, Xin Qi1

  • 1Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, No. 76, West Yanta Road, Xi'an, China.

Cerebral Cortex (New York, N.Y. : 1991)
|February 29, 2020
PubMed
Summary
This summary is machine-generated.

This study explored brain imaging and intelligence links using genetic data. A specific brain imaging measure (NET100_0624) showed a significant genetic association with intelligence in a large UK Biobank sample.

Keywords:
brain image-derived phenotypesintelligencelinkage disequilibrium score regressionpolygenic risk score

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Area of Science:

  • Neuroimaging genetics
  • Cognitive neuroscience
  • Quantitative genetics

Background:

  • Limited research exists on the genetic links between brain structure/function and intelligence.
  • Brain image-derived phenotypes (IDPs) offer insights into neural correlates of cognition.

Purpose of the Study:

  • To systematically investigate genetic relationships between 3144 brain IDPs and intelligence.
  • To identify specific brain imaging traits genetically associated with intelligence.

Main Methods:

  • Two-stage analysis: Genome-wide association studies (GWAS) linkage disequilibrium score regression (LDSC) and polygenic risk score (PRS) analysis.
  • Utilized summary statistics from GWAS of brain IDPs and intelligence datasets.
  • Employed UK Biobank individual-level data (N=160,124) for replication.

Main Results:

  • LDSC identified significant genetic correlations between several brain IDPs and intelligence.
  • NET100_0624 demonstrated a consistent genetic association with intelligence across two datasets.
  • PRS analysis confirmed NET100_0624's association with intelligence (P=5.26×10⁻²⁰) in UK Biobank participants.

Conclusions:

  • This study provides evidence for shared genetic underpinnings between specific brain imaging phenotypes and intelligence.
  • NET100_0624 emerges as a key brain imaging trait linked to intelligence.
  • Findings contribute to understanding the genetic basis of intelligence and brain structure/function relationships.