Please use this identifier to cite or link to this item:
|Title:||The COMT Val158Met polymorphism and cognition in depressed and nondepressed older adults|
|Citation:||Potter, G.G., Taylor, W.D., McQuoid, D.R., Steffens, D.C., Welsh-Bohmer, K.A., Krishnan, K.R.R. (2009-10). The COMT Val158Met polymorphism and cognition in depressed and nondepressed older adults. International Journal of Geriatric Psychiatry 24 (10) : 1127-1133. ScholarBank@NUS Repository. https://doi.org/10.1002/gps.2235|
|Abstract:||Objective: The objective of the current study was to examine the relationship between the COMT Val158Met polymorphism and neuropsychological performance in depressed and nondepressed older adults. Methods: One hundred and twenty-six clinically depressed older adults and 105 nondepressed comparison participants were compared on neuropsychological performance and COMT Val158Met (Val/Val, Val/Met, Met/Met). Results: Based on multivariate regression models, the COMT Val158Met polymorphism was not associated with cognitive performance among depressed or nondepressed individuals, nor did this polymorphism account for the fact that depressed individuals performed worse than nondepressed individuals on several neuropsychological tests that are typically affected by depression. There was also no difference in frequency of the COMT Val158Met alleles between depressed and nondepressed individuals. Conclusions: Although the current study found no association between COMT Val158Met polymorphism on a number of clinical neuropsychological tests that are typically found to be sensitive to depression, differential effects of the COMT Val158Met polymorphism on dopamine transmission in psychiatric and non-psychiatric populations may be further clarified by clinical research with neuroscience-based paradigms that segregate cognitive tasks into component processes with precise neural substrates, particularly with respect to the complex functions of the prefrontal cortex. Negative results can be important to narrowing down target processes and understanding the influence of clinical and demographic characteristics in studies of psychiatric genetics. Copyright © 2009 John Wiley & Sons, Ltd.|
|Source Title:||International Journal of Geriatric Psychiatry|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 18, 2018
WEB OF SCIENCETM
checked on Jul 17, 2018
checked on Aug 10, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.