title: Global white matter microstructural abnormalities associated with addiction liability score in drug naïve youth.
abstract: Abnormalities in brain white matter (WM) structure have been reported in youths having a family history of substance use disorders (SUDs). It was hypothesized that these abnormalities constitute features of the liability for SUDs transmitted across generations. The association between severity of intergenerational risk for SUD, measured by the Transmissible Liability Index (TLI), and white matter microstructure was examined. Diffusion tensor imaging (DTI) measured WM microstructure in forty-four drug-naïve 10-14 year-olds (N = 19 with parental SUD). Metrics of WM microstructure (i.e., fractional anisotropy, radial diffusivity, mean diffusivity and axial diffusivity) were quantified across the whole brain and in four tracts of interest: anterior corona radiata, superior and inferior longitudinal fasciculi and superior fronto-occipital fasciculi. The TLI was completed by the youths, their parents and, when available, their teachers. The relationship between WM structure and TLI score across the entire group was evaluated using linear multiple regression and between group comparisons were also examined. Fractional anisotropy and radial diffusivity in multiple tracts across the brain were significantly associated with TLI scores. Confirming and extending prior research, the findings indicate that global atypicality in WM tracts was linearly related to liability for eventual SUD development in drug naïve youths.
authors.affiliation: Department of Psychiatry, Indiana University School of Medicine, 705 Riley Hospital Drive, Room 4300, Indianapolis, IN, 46205, USA. lhulvers@iupui.edu.
authors.forename: Leslie
authors.initials: L
authors.lastname: Hulvershorn
authors.affiliation: Department of Psychiatry, Indiana University School of Medicine, 705 Riley Hospital Drive, Room 4300, Indianapolis, IN, 46205, USA.
authors.forename: Tom
authors.initials: T
authors.lastname: Hummer
authors.affiliation: Department of Radiology, Indiana University School of Medicine, Indianapolis, IN, USA.
authors.forename: Yu-Chien
authors.initials: YC
authors.lastname: Wu
authors.affiliation: Center for Education and Drug Abuse Research (CEDAR), University of Pittsburgh School of Pharmacy, Pittsburgh, PA, USA.
authors.forename: Ralph
authors.initials: R
authors.lastname: Tarter
authors.affiliation: Department of Psychiatry, Indiana University School of Medicine, 705 Riley Hospital Drive, Room 4300, Indianapolis, IN, 46205, USA.
authors.forename: Parker
authors.initials: P
authors.lastname: Rea
authors.affiliation: Center for Behavioral Health, Cleveland Clinic, Cleveland, OH, USA.
authors.forename: Amit
authors.initials: A
authors.lastname: Anand
authors.affiliation: Department of Psychiatry, Indiana University School of Medicine, 705 Riley Hospital Drive, Room 4300, Indianapolis, IN, 46205, USA.
authors.forename: R
authors.initials: R
authors.lastname: Andrew Chambers
authors.affiliation: Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Finn
mesh_terms: D000293:Adolescent; D016739:Behavior, Addictive / Q000000981:diagnostic imaging* / Q000235:genetics / Q000473:pathology; D001921:Brain / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000473:pathology; D002648:Child; D056324:Diffusion Tensor Imaging; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D009434:Neural Pathways / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000473:pathology; D010290:Parents; D012044:Regression Analysis; D019966:Substance-Related Disorders / Q000000981:diagnostic imaging* / Q000235:genetics / Q000473:pathology; D066127:White Matter / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000473:pathology
keywords: Adolescence; Diffusion; Substance use disorders; White matter