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Updated: Jun 22, 2026
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Generalized Psychophysiological Interaction (PPI) Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
Published on: November 14, 2017
Gene polymorphisms in prodynorphin (PDYN) are associated with episodic memory in the elderly
Heike Kölsch1, Michael Wagner, Andras Bilkei-Gorzó
1Department of Psychiatry, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany. heike.koelsch@ukb.uni-bonn.de
Summary
Genetic variations in the prodynorphin (PDYN) gene are linked to better episodic memory in older adults. Specific single nucleotide polymorphisms (SNPs) and haplotypes within PDYN show a significant association with enhanced memory performance.
Area of Science:
- Neuroscience
- Genetics
- Gerontology
Background:
- Cognitive functions exhibit significant variability and heritability in elderly populations.
- Dynorphins, peptides influenced by the prodynorphin (PDYN) gene, are known to affect cognition and memory, particularly in aged animal models.
Purpose of the Study:
- To investigate the association between variations in the PDYN gene and cognitive functions, specifically episodic memory and verbal fluency, in a large cohort of elderly individuals.
- To examine the impact of four single nucleotide polymorphisms (SNPs) and a VNTR promoter polymorphism in the PDYN gene on cognitive performance.
Main Methods:
- A large sample of 1619 elderly individuals (mean age 80 years) from the AgeCoDe study were genotyped for specific PDYN SNPs (rs7272891, rs1997794, rs2235751, rs910080) and a VNTR promoter polymorphism.
- Episodic memory and verbal fluency were assessed in relation to the identified genetic variations.
- Statistical analyses were performed to determine the association between genotypes, haplotypes, and cognitive scores.
Main Results:
- Carriers of the minor alleles for rs1997794 (P < 0.002) and rs910080 (P < 0.005) demonstrated significantly higher episodic memory scores compared to homozygote carriers of the major alleles.
- A three-marker haplotype (rs1997794, rs2235751, rs910080) was also significantly associated with improved episodic memory.
- While verbal fluency scores were directionally better in carriers of these alleles, the association was not statistically significant.
Conclusions:
- Genetic variations within the PDYN gene play a role in modulating episodic memory function in elderly humans.
- These findings highlight the potential of PDYN gene polymorphisms as biomarkers for cognitive aging and memory performance.
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