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Published on: November 14, 2017
Gene network effects on brain microstructure and intellectual performance identified in 472 twins
Ming-Chang Chiang1, Marina Barysheva, Katie L McMahon
1Department of Biomedical Engineering, National Yang-Ming University, Taipei, 112, Taiwan.
Summary
Researchers identified a gene network influencing brain wiring and integrity in young adults. This network impacts intellectual performance by connecting genetic variants to white matter tract integrity.
Area of Science:
- Neuroscience
- Genetics
- Brain Imaging
Background:
- Identifying genes affecting brain integrity and function is a major neuroscience challenge.
- Current genome-wide studies face high false positive rates and struggle to analyze gene interactions.
- Understanding genetic contributions to brain connectivity is complex.
Purpose of the Study:
- To develop a novel computational approach for discovering genes that influence brain wiring and fiber integrity.
- To identify networks of genes with common genetic determination in brain systems.
- To investigate the relationship between genetic networks, brain integrity, and intellectual performance.
Main Methods:
- Studied genetic correlations across thousands of points in human brain images from 472 twins and siblings.
- Combined clustering with genome-wide scanning to identify brain systems with shared genetic influences.
- Employed network analysis and novel image filtering techniques to find causal genes.
Main Results:
- Discovered a network of genes significantly affecting brain wiring and fiber integrity in healthy young adults.
- The identified gene network exhibited small-world and scale-free properties, indicating efficient and resilient genetic interactions.
- Genetic variants at network hubs modulated the association between intelligence quotient and white matter tract integrity.
Conclusions:
- The novel strategy enhances the computational tractability of discovering genes related to brain integrity.
- The findings reveal a complex genetic architecture underlying brain connectivity and its link to cognitive function.
- This research provides insights into the genetic basis of brain structure-function relationships and intellectual performance.
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