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  COMT Polymorphism and Memory Dedifferentiation in Old Age

Papenberg, G., Bäckman, L., Nagel, I. E., Nietfeld, W., Schröder, J., Bertram, L., et al. (2014). COMT Polymorphism and Memory Dedifferentiation in Old Age. Psychology and Aging, 29(2), 374-383. doi:10.1037/a0033225.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F9B2-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-AA56-B
Genre: Journal Article

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 Creators:
Papenberg, Goran, Author
Bäckman, Lars, Author
Nagel, Irene E., Author
Nietfeld, Wilfried1, Author              
Schröder, Julia, Author
Bertram, Lars2, Author              
Heekeren, Hauke R., Author
Lindenberger, Ulman, Author
Li, Shu-Chen, Author
Affiliations:
1Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1433550              
2Neuropsychiatric Genetics (Lars Bertram), Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479655              

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 Abstract: According to a neurocomputational theory of cognitive aging, senescent changes in dopaminergic modulation lead to noisier and less differentiated processing. The authors tested a corollary hypothesis of this theory, according to which genetic predispositions of individual differences in prefrontal dopamine (DA) signaling may affect associations between memory functions, particularly in old age. Latent correlations between factors of verbal episodic memory and spatial working memory were compared between individuals carrying different allelic variants of the Catechol-O-Methyltransferase (COMT) Val158Met polymorphism, which influences DA availability in prefrontal cortex. In younger adults (n = 973), correlations between memory functions did not differ significantly among the 3 COMT genotypes (r = .35); in older adults (n = 1333), however, the correlation was significantly higher in Val homozygotes (r = .70), whose prefrontal DA availability is supposedly the lowest of all groups examined, than in heterozygotes and Met homozygotes (both rs = .29). Latent means of the episodic memory and working memory factors did not differ by COMT status within age groups. However, when restricting the analysis to the low-performing tertile of older adults (n = 443), we found that Val homozygotes showed lower levels of performance in both episodic memory and working memory than heterozygotes and Met homozygotes. In line with the neurocomputational theory, the observed dedifferentiation of memory functions in older Val homozygotes suggests that suboptimal dopaminergic modulation may underlie multiple facets of memory declines during aging. Future longitudinal work needs to test this conjecture more directly. (PsycINFO Database Record (c) 2013 APA, all rights reserved)

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Language(s): eng - English
 Dates: 2013-07-082014-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1037/a0033225
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Title: Psychology and Aging
Source Genre: Journal
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Publ. Info: Arlington, VA : American Psychological Association (PsycARTICLES)
Pages: - Volume / Issue: 29 (2) Sequence Number: - Start / End Page: 374 - 383 Identifier: ISSN: 0882-7974
CoNE: https://pure.mpg.de/cone/journals/resource/954925548313