KIBRA gene polymorphism has no association with verbal or visual episodic memory performance

Area of Science:

• Neuroscience
• Genetics
• Cognitive Psychology

Background:

• Individual differences in memory performance are partly attributed to genetic variations affecting proteins crucial for long-term potentiation (LTP).
• The KIBRA gene has been implicated in synaptic plasticity and memory, making its genetic variants potential contributors to memory variability.

Purpose of the Study:

• To investigate the association between a specific single-nucleotide polymorphism (SNP) in the KIBRA gene (rs17070145) and episodic memory performance.
• To determine if KIBRA genotype influences verbal and visual episodic memory in a cohort of healthy older adults.

Main Methods:

• Recruitment of 386 healthy older adults (256 female, 130 male; mean age 60.86 years) from the Tasmanian Healthy Brain Project (THBP).
• Assessment of episodic memory using multiple neuropsychological tests, including the Rey Auditory Verbal Learning Task, Logical Memory test, Paired Associates Learning test, and Rey Complex Figure Task.
• Genotyping for the KIBRA rs17070145 single-nucleotide polymorphism (SNP).

Main Results:

• No statistically significant association was found between the KIBRA rs17070145 polymorphism and performance on any of the episodic memory measures used.
• Episodic memory performance, encompassing both verbal and visual modalities, was not demonstrably affected by the KIBRA genotype in this sample.

Conclusions:

• The findings suggest that the KIBRA rs17070145 polymorphism has minimal to no functional impact on episodic memory performance in healthy older adults.
• Further research may be needed to explore other genetic factors or non-genetic influences on inter-individual variability in memory function.