Alcohol exposure decreases CREB binding protein expression and histone acetylation in the developing cerebellum.

Alcohol exposure decreases CREB binding protein expression and histone acetylation in the developing cerebellum.
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DOI:
10.1371/journal.pone.0019351
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Zhao X
Zhao X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Guo W;Crossey EL;Zhang L;Zucca S;George OL;Valenzuela CF;Zhao X

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在美国,每100名儿童中就有1人受到胎儿酒精暴露的影响,这使其成为导致智力低下的主要原因。人们早就知道酒精会影响小脑的发育和功能。然而,其潜在的分子机制尚不清楚。我们证明CREB结合蛋白(CBP)广泛表达于幼稚大鼠小脑皮质发育中的颗粒神经元和浦肯野神经元。我们还表明,在相当于人类怀孕的第三个三个月期间,接触乙醇会降低CBP水平。CBP是一种组蛋白乙酰转移酶,是控制神经元基因表达的表观遗传机制的组成部分。我们进一步证明,乙醇处理的大鼠小脑中组蛋白H3和H4的乙酰化程度降低。这些发现表明,酒精暴露降低了发育中的小脑中CBP的表达和功能。酒精的这种效应可能是导致运动协调缺陷的原因,这种缺陷是胎儿酒精谱系障碍的特征。
Fetal alcohol exposure affects 1 in 100 children making it the leading cause of mental retardation in the US. It has long been known that alcohol affects cerebellum development and function. However, the underlying molecular mechanism is unclear. We demonstrate that CREB binding protein (CBP) is widely expressed in granule and Purkinje neurons of the developing cerebellar cortex of naïve rats. We also show that exposure to ethanol during the 3rd trimester-equivalent of human pregnancy reduces CBP levels. CBP is a histone acetyltransferase, a component of the epigenetic mechanism controlling neuronal gene expression. We further demonstrate that the acetylation of both histone H3 and H4 is reduced in the cerebellum of ethanol- treated rats. These findings indicate that ethanol exposure decreases the expression and function of CBP in the developing cerebellum. This effect of ethanol may be responsible for the motor coordination deficits that characterize fetal alcohol spectrum disorders.
DOI: 10.1111/j.1530-0277.1993.tb00808.x
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