کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1066917 948853 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Withdrawal from chronic intermittent alcohol exposure increases dendritic spine density in the lateral orbitofrontal cortex of mice
ترجمه فارسی عنوان
پرهیز از مواجهه متناوب مزمن با الکل باعث افزایش تراکم ستون فقرات دندریتیک در قشر اورتربرونتال جانبی موش می شود
کلمات کلیدی
قرار گرفتن متناوب در معرض اتانول مزمن؛ ستون دندریتیک؛ OFC جانبی؛ شکل پذیری سازه؛ گیرنده NMDA
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی

Alcohol use disorders (AUDs) are associated with functional and morphological changes in subfields of the prefrontal cortex. Clinical and preclinical evidence indicates that the orbitofrontal cortex (OFC) is critical for controlling impulsive behaviors, representing the value of a predicted outcome, and reversing learned associations. Individuals with AUDs often demonstrate deficits in OFC-dependent tasks, and rodent models of alcohol exposure show that OFC-dependent behaviors are impaired by chronic alcohol exposure. To explore the mechanisms that underlie these impairments, we examined dendritic spine density and morphology, and NMDA-type glutamate receptor expression in the lateral OFC of C57BL/6J mice following chronic intermittent ethanol (CIE) exposure. Western blot analysis demonstrated that NMDA receptors were not altered immediately following CIE exposure or after 7 days of withdrawal. Morphological analysis of basal dendrites of layer II/III pyramidal neurons revealed that dendritic spine density was also not affected immediately after CIE exposure. However, the total density of dendritic spines was significantly increased after a 7-day withdrawal from CIE exposure. The effect of withdrawal on spine density was mediated by an increase in the density of long, thin spines with no change in either stubby or mushroom spines. These data suggest that morphological neuroadaptations in lateral OFC neurons develop during alcohol withdrawal and occur in the absence of changes in the expression of NMDA-type glutamate receptors. The enhanced spine density that follows alcohol withdrawal may contribute to the impairments in OFC-dependent behaviors observed in CIE-treated mice.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Alcohol - Volume 49, Issue 1, February 2015, Pages 21–27
نویسندگان
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