Lasting epigenetic influence of early-life adversity on the BDNF gene.

Lasting epigenetic influence of early-life adversity on the BDNF gene.
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DOI:
10.1016/j.biopsych.2008.11.028
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发表时间:
2009-05-01
影响因子:
10.6
通讯作者:
Sweatt, J. David
Sweatt, J. David
中科院分区:
医学1区
文献类型:
--
作者:
Roth, Tania L.;Lubin, Farah D.;Funk, Adam J.;Sweatt, J. David

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童年虐待和早期创伤会在认知和情感的神经机制上留下持久的印记。我们使用一个由看护者虐待婴儿的大鼠模型,研究早期生活逆境是否在CNS中的脑源性神经营养因子(BDNF)基因上留下持久的表观遗传标记。在出生后的第一周,我们将幼鼠暴露于主要表现出虐待行为的压力看护者。然后,我们评估了整个生命周期中的DNA甲基化模式和基因表达,以及下一代婴儿的DNA甲基化模式。早期的虐待导致BDNF DNA甲基化的持续变化,导致成年前额叶皮层BDNF基因表达的改变。此外,我们观察到,在后代的BDNF DNA甲基化改变的女性,以前经历了虐待方案。这些结果强调了一种表观遗传分子机制,这种机制可能是由早期虐待和忽视引起的基因表达和行为变化的终身和跨代延续的基础。
Childhood maltreatment and early trauma leave lasting imprints on neural mechanisms of cognition and emotion. Using a rat model of infant maltreatment by a caregiver, we investigated whether early-life adversity leaves lasting epigenetic marks at the Brain-derived Neurotrophic Factor (BDNF) gene in the CNS. During the first postnatal week, we exposed infant rats to stressed caretakers that predominately displayed abusive behaviors. We then assessed DNA methylation patterns and gene expression throughout the life span, as well as DNA methylation patterns in the next generation of infants. Early maltreatment produced persisting changes in methylation of BDNF DNA that caused altered BDNF gene expression in the adult prefrontal cortex. Furthermore, we observed altered BDNF DNA methylation in offspring of females that had previously experienced the maltreatment regimen. These results highlight an epigenetic molecular mechanism potentially underlying lifelong and transgenerational perpetuation of changes in gene expression and behavior incited by early abuse and neglect.
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