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The role of KIBRA in reconstructive episodic memory
Armin Zlomuzica1, Friederike Preusser2, Susanna Roberts3
1Mental Health Research and Treatment Center, Ruhr-Universität Bochum, 150, 44780, Bochum, Germany. armin.zlomuzica@rub.de.
Molecular Medicine (Cambridge, Mass.)
|August 24, 2018
Summary
The KIBRA rs17070145 T-allele enhances episodic memory retrieval and accuracy in a gender-specific way. This finding is crucial for understanding memory processes and conditions like dementia and PTSD.
Area of Science:
- Neuroscience
- Genetics
- Cognitive Psychology
Background:
- Episodic memory retrieval involves reconstructing past events using semantic memory.
- Failures in reconstruction lead to false memories.
- KIBRA rs17070145 polymorphism is associated with episodic memory and risks for Alzheimer's disease and PTSD.
Purpose of the Study:
- To investigate the role of KIBRA rs17070145 polymorphism in reconstructive episodic memory.
- To examine gender differences in the effects of this polymorphism.
Main Methods:
- Utilized the Deese-Roediger-McDermott (DRM) paradigm.
- Studied 219 healthy individuals, analyzing CC vs. CT/TT genotypes in males and females.
- Assessed free recall and recognition performance.
Main Results:
- Females showed better free recall than males.
- A trend for gender x genotype interaction was observed in false recognition rates.
- CT/TT carriers had lower false recognition rates for critical lures compared to CC carriers, particularly in females.
- CT/TT carriers exhibited more "remember" and fewer "know" responses than CC carriers for correctly recognized items.
Conclusions:
- The T-allele of KIBRA rs17070145 supports recollection-based episodic memory retrieval.
- This allele contributes to memory accuracy in a gender-dependent manner.
- Findings have implications for understanding memory deficits in dementia and PTSD.
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