Diffusion abnormalities in adolescents and young adults with a history of heavy cannabis use

被引:106
|
作者
Ashtari, Manzar [1 ]
Cervellione, Kelly [2 ]
Cottone, John [3 ]
Ardekani, Babak A. [4 ]
Kumra, Sanjiv [5 ]
机构
[1] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[2] Jamaica Hosp Med Ctr, Dept Clin Res, Jamaica, NY USA
[3] Zucker Hillside Hosp, Dept Psychiat Res, Glen Oaks, NY USA
[4] Nathan S Kline Inst Psychiat Res, Ctr Adv Brain Imaging, Orangeburg, NY 10962 USA
[5] Univ Minnesota, Dept Psychiat, Minneapolis, MN 55455 USA
关键词
Brain; Cannabis; Adolescent; Diffusion tensor imaging; Tractography; Magnetic resonance imaging;
D O I
10.1016/j.jpsychires.2008.12.002
中图分类号
R749 [精神病学];
学科分类号
100205 ;
摘要
Background: There is growing evidence that adolescence is a key period for neuronal maturation. Despite the high prevalence of marijuana use among adolescents and young adults in the United States and internationally, very little is known about its impact on the developing brain. Based on neuroimaging literature on normal brain developmental during adolescence, we hypothesized that individuals with heavy cannabis use (HCU) would have brain structure abnormalities in similar brain regions that undergo development during late adolescence, particularly the fronto-temporal connection. Method: Fourteen young adult males in residential treatment for cannabis dependence and 14 age-matched healthy male control subjects were recruited. Patients had a history of HCU throughout adolescence; 5 had concurrent alcohol abuse. Subjects underwent structural and diffusion tensor magnetic resonance imaging. White matter integrity was compared between subject groups using voxelwise and fiber tractography analysis. Results: Voxelwise and tractography analyses revealed that adolescents with HCU had reduced fractional anisotropy, increased radial diffusivity, and increased trace in the homologous areas known to be involved in ongoing development during late adolescence, particularly in the fronto-temporal connection via arcuate fasciculus. Conclusions: Our results support the hypothesis that heavy cannabis use during adolescence may affect the trajectory of normal brain maturation. Due to concurrent alcohol consumption in five HCU subjects, conclusions from this study should be considered preliminary, as the DTI findings reported here may be reflective of the combination of alcohol and marijuana use. Further research in larger samples, longitudinal in nature, and controlling for alcohol consumption is needed to better understand the pathophysiology of the effect of cannabis on the developing brain. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:189 / 204
页数:16
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