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Published on: January 9, 2020
Genetic variants associated with longitudinal changes in brain structure across the lifespan
Rachel M Brouwer1,2, Marieke Klein3,4,5,6, Katrina L Grasby7
1Department of Psychiatry, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands. r.m2.brouwer@vu.nl.
This study identified genetic variants influencing human brain growth and atrophy rates. These findings link brain development and aging to various health conditions, including psychiatric and neurodegenerative diseases.
Area of Science:
- Neuroscience
- Genetics
- Human Lifespan Development
Background:
- Human brain structure undergoes continuous changes across the lifespan.
- Deviations in brain growth or atrophy rates are linked to numerous psychiatric, developmental, and neurodegenerative disorders.
Purpose of the Study:
- To conduct the first genome-wide association meta-analysis to identify genetic variants affecting brain morphology changes throughout life.
- To investigate the genetic underpinnings of brain growth and atrophy rates.
Main Methods:
- Utilized longitudinal magnetic resonance imaging data from 15,640 individuals.
- Calculated rates of change for 15 distinct brain structures.
- Performed a genome-wide association meta-analysis.
Main Results:
- Identified significant genetic variants, including GPR139, DACH1, and APOE, associated with brain structure changes.
- These genes are linked to metabolic processes.
- Found genetic overlap with conditions such as depression, schizophrenia, cognitive function, insomnia, height, BMI, and smoking.
Conclusions:
- Genetic variants play a crucial role in modulating rates of brain growth and atrophy.
- These genetic factors are implicated in both early brain development and neurodegenerative processes.
- Understanding these variants can illuminate biological pathways for healthy and dysfunctional brain development and aging.
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