title: Negative and interactive effects of sex, aging, and alcohol abuse on gray matter morphometry.
abstract: Chronic alcohol use is associated with declines in gray matter (GM) volume, as is the normal aging process. Less apparent, however, is how the interaction between aging and heavy alcohol use affects changes in GM across the lifespan. There is some evidence that women are more vulnerable to the negative effects of alcohol use on GM than men. In the current study, we examined whether localized GM was related to measures of alcohol use disorder (e.g., AUDIT score) in a large sample (N = 436) of participants, ages 18-55 years, with a range of disease severity, using both voxel-based morphometry (VBM) and surface-based morphometry (SBM). We also explored whether GM associations with alcohol use disorder (AUD) severity are moderated by sex and age. Results showed significant negative associations between AUD severity and GM volume throughout temporal, parietal, frontal, and occipital lobes. Women showed more negative effects of alcohol use than men for cortical thickness in left orbitofrontal cortex, but evidence for increased vulnerability based on sex was limited overall. Similarly, a specific age by alcohol use interaction was observed for volume of right insula, but other regional or global interactions were not statistically supported. However, significant negative associations between heavy alcohol use and GM volumes were observed as early as 18-25 years. These findings support that alcohol has deleterious effects on global and regional GM above and beyond age, and, of particular importance, that regional associations emerge in early adulthood. Hum Brain Mapp 37:2276-2292, 2016. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Psychology & Neuroscience, University of Colorado Boulder, Boulder, Colorado.
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Thayer
authors.affiliation: Department of Psychology & Neuroscience, University of Colorado Boulder, Boulder, Colorado.
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Hagerty
authors.affiliation: Department of Psychology & Neuroscience, University of Colorado Boulder, Boulder, Colorado.
authors.forename: Amithrupa
authors.initials: A
authors.lastname: Sabbineni
authors.affiliation: Mind Research Network, Albuquerque, New Mexico.
authors.forename: Eric D
authors.initials: ED
authors.lastname: Claus
authors.affiliation: Department of Psychology & Neuroscience, University of Colorado Boulder, Boulder, Colorado.
authors.forename: Kent E
authors.initials: KE
authors.lastname: Hutchison
authors.affiliation: Department of Psychology & Neuroscience, University of Colorado Boulder, Boulder, Colorado.
authors.forename: Barbara J
authors.initials: BJ
authors.lastname: Weiland
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging / Q000473:pathology*; D000437:Alcoholism / Q000000981:diagnostic imaging*; D002540:Cerebral Cortex / Q000000981:diagnostic imaging*; D005260:Female; D066128:Gray Matter / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D012720:Severity of Illness Index; D012727:Sex Characteristics; D055815:Young Adult
keywords: aging; alcohol use disorder; neuroimaging; sex differences; surface-based morphometry; voxel-based morphometry