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Association Between Reduced Brain Glucose Metabolism and Cortical Thickness in Alcoholics: Evidence of Neurotoxicity.
International Journal of Neuropsychopharmacology ( IF 4.8 ) Pub Date : 2019-09-01 , DOI: 10.1093/ijnp/pyz036
Dardo G Tomasi 1 , Corinde E Wiers 1 , Ehsan Shokri-Kojori 1 , Amna Zehra 1 , Veronica Ramirez 1 , Clara Freeman 1 , Jamie Burns 1 , Christopher Kure Liu 1 , Peter Manza 1 , Sung W Kim 1 , Gene-Jack Wang 1 , Nora D Volkow 1, 2
Affiliation  

BACKGROUND Excessive alcohol consumption is associated with reduced cortical thickness (CT) and lower cerebral metabolic rate of glucose (CMRGlu), but the correlation between these 2 measures has not been investigated. METHODS We tested the association between CT and cerebral CMRGlu in 19 participants with alcohol use disorder (AUD) and 20 healthy controls. Participants underwent 2-Deoxy-2-[18F]fluoroglucose positron emission tomography to map CMRGlu and magnetic resonance imaging to assess CT. RESULTS Although performance accuracy on a broad range of cognitive domains did not differ significantly between AUD and HC, AUD had widespread decreases in CT and CMRGlu. CMRGlu, normalized to cerebellum (rCMRGlu), showed significant correlation with CT across participants. Although there were large group differences in CMRGlu (>17%) and CT (>6%) in medial orbitofrontal and BA 47, the superior parietal cortex showed large reductions in CMRGlu (~17%) and minimal CT differences (~2.2%). Though total lifetime alcohol (TLA) was associated with CT and rCMRGlu, the causal mediation analysis revealed significant direct effects of TLA on rCMRGlu but not on CT, and there were no significant mediation effects of TLA, CT, and rCMRGlu. CONCLUSIONS The significant correlation between decrements in CT and CMRGlu across AUD participants is suggestive of alcohol-induced neurotoxicity, whereas the findings that the most metabolically affected regions in AUD had minimal atrophy and vice versa indicates that changes in CT and CMRGlu reflect distinct responses to alcohol across brain regions.

中文翻译:

酒精中毒者大脑葡萄糖代谢减少与皮层厚度之间的关联:神经毒性的证据。

背景技术过量饮酒与皮质厚度(CT)降低和葡萄糖脑代谢速率(CMRGlu)降低有关,但尚未研究这两种措施之间的相关性。方法我们测试了19位饮酒障碍(AUD)参与者和20位健康对照者的CT与大脑CMRGlu之间的关联。参与者进行了2-脱氧-2- [18F]氟葡萄糖正电子发射断层扫描以绘制CMRGlu的图,并通过磁共振成像评估CT。结果尽管AUD和HC在广泛的认知领域中的表现准确性没有显着差异,但是AUD在CT和CMRGlu中普遍下降。标准化为小脑(rCMRGlu)的CMRGlu与参与者的CT显示显着相关性。尽管CMRGlu(> 17%)和CT(>> 在内侧眶额叶和BA 47中,有6%的上皮层表现出CMRGlu的大幅降低(〜17%)和最小的CT差异(〜2.2%)。尽管总终生酒精含量(TLA)与CT和rCMRGlu相关,但因果关系分析显示TLA对rCMRGlu有明显的直接影响,但对CT没有影响,并且TLA,CT和rCMRGlu没有显着的中介作用。结论AUD参与者中CT和CMRGlu的降低之间的显着相关性提示酒精诱导的神经毒性,而AUD代谢最易受影响的区域萎缩最小,反之亦然,这表明CT和CMRGlu的变化反映了对酒精的不同反应跨大脑区域。上层顶叶皮层显示CMRGlu大幅降低(〜17%),CT差异最小(〜2.2%)。尽管总终生酒精含量(TLA)与CT和rCMRGlu相关,但因果关系分析显示TLA对rCMRGlu有明显的直接影响,但对CT没有影响,并且TLA,CT和rCMRGlu没有显着的中介作用。结论AUD参与者中CT和CMRGlu的降低之间的显着相关性提示酒精诱导的神经毒性,而AUD代谢最易受影响的区域萎缩最小,反之亦然,这表明CT和CMRGlu的变化反映了对酒精的不同反应跨大脑区域。上层顶叶皮层显示CMRGlu大幅降低(〜17%),CT差异最小(〜2.2%)。尽管终生总酒精含量(TLA)与CT和rCMRGlu相关,但因果关系分析显示TLA对rCMRGlu有明显的直接影响,但对CT没有影响,并且TLA,CT和rCMRGlu没有显着的中介作用。结论AUD参与者中CT和CMRGlu的降低之间的显着相关性提示酒精诱导的神经毒性,而AUD代谢最易受影响的区域萎缩最小,反之亦然,这表明CT和CMRGlu的变化反映了对酒精的不同反应跨大脑区域。因果调解分析显示,TLA对rCMRGlu有显着的直接影响,但对CT没有影响,并且TLA,CT和rCMRGlu没有显着的调解作用。结论AUD参与者中CT和CMRGlu的降低之间的显着相关性提示酒精诱导的神经毒性,而AUD代谢最易受影响的区域萎缩最小,反之亦然,这表明CT和CMRGlu的变化反映了对酒精的不同反应跨大脑区域。因果调解分析显示,TLA对rCMRGlu有显着的直接影响,但对CT没有影响,并且TLA,CT和rCMRGlu没有显着的调解作用。结论AUD参与者中CT和CMRGlu的降低之间的显着相关性提示酒精诱导的神经毒性,而AUD代谢最易受影响的区域萎缩最小,反之亦然,这表明CT和CMRGlu的变化反映了对酒精的不同反应跨大脑区域。
更新日期:2019-11-01
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