Differential effects of COMT on gait and executive control in aging

R. Holtzer, L. Ozelius, X. Xue, T. Wang, R. B. Lipton, J. Verghese

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

Walking speed is associated with attention and executive control processes subserved by the prefrontal cortex. Because polymorphisms in catechol-O-methyltransferase (COMT) influence these cognitive processes we hypothesized that the same polymorphisms may influence gait velocity. We examined the associations between the Val158Met polymorphism in COMT and gait velocity as well as attention and executive function. Participants were 278 non-demented older adults. The results revealed that methionine (Met)/valine (Val) was associated with faster gait velocity. This association can be explained by the putative role of the Val allele in regulating tonic dopamine release in the striatum. In contrast, Met/Met was associated with better attention and executive function. Stratification by gender revealed that the association between COMT genotype and gait was significant only in men. Conversely, the association between COMT genotype and attention and executive function was significant only in women. These findings suggest a differential effect in relating the Val158Met polymorphism to gait and to cognitive function while supporting the previously described sexual dimorphism in the phenotypic expressions of COMT.

Original languageEnglish (US)
Pages (from-to)523-531
Number of pages9
JournalNeurobiology of Aging
Volume31
Issue number3
DOIs
StatePublished - Mar 1 2010

Keywords

  • Aging
  • Attention
  • COMT
  • Cognition
  • Executive function
  • Gait velocity

ASJC Scopus subject areas

  • Neuroscience(all)
  • Aging
  • Clinical Neurology
  • Developmental Biology
  • Geriatrics and Gerontology

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