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No association between CTNNBL1 and episodic memory performance
T Liu1, S-C Li2, G Papenberg3
11] Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany [2] Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, Berlin, Germany.
Translational Psychiatry
|October 1, 2014
Summary
Genetic variations in the CTNNBL1 gene were previously linked to memory. However, this study found no significant association between CTNNBL1 gene variants and episodic memory performance in a larger cohort.
Area of Science:
- Neurogenetics
- Cognitive Neuroscience
- Human Genetics
Background:
- Recent genome-wide association studies suggested a link between catenin-β-like 1 (CTNNBL1) gene polymorphisms and verbal episodic memory, specifically delayed free recall.
- This prior finding indicated a potential genetic influence on specific memory functions in healthy young adults.
Purpose of the Study:
- To validate and expand upon the association between CTNNBL1 genetic variations and episodic memory performance.
- To investigate the relationship between a comprehensive set of CTNNBL1 single-nucleotide polymorphisms (SNPs) and multiple measures of episodic memory.
Main Methods:
- Genotyped 455 single-nucleotide polymorphisms (SNPs) within or near the CTNNBL1 gene in 1743 participants from the Berlin Aging Study II.
- Assessed episodic memory using 14 distinct measures across three different tasks.
- Employed linear regression analysis to test for associations between CTNNBL1 SNPs and memory performance measures.
Main Results:
- No statistically significant associations were found between any of the tested CTNNBL1 SNPs and the 14 measures of episodic memory.
- The study possessed sufficient statistical power to detect the effect sizes reported in previous research.
- The previously reported association between CTNNBL1 and verbal delayed free recall was not replicated.
Conclusions:
- The findings suggest that the previously reported effects of CTNNBL1 gene polymorphisms on episodic memory performance may not generalize to a broader range of memory tasks or a wider age demographic.
- If not spurious, the effects of CTNNBL1 on memory might be confined to a very specific cognitive domain, such as delayed verbal free recall within a narrow time window.
- Further research is necessary to elucidate the precise role of the CTNNBL1 gene in human memory functions.
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