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Early exposure to environmental enrichment modulates the effects of prenatal ethanol exposure upon opioid gene expression and adolescent ethanol intake.
Neuropharmacology ( IF 4.6 ) Pub Date : 2019-12-19 , DOI: 10.1016/j.neuropharm.2019.107917
Aranza Wille-Bille 1 , Fabio Bellia 2 , Ana María Jiménez García 3 , Roberto Sebastián Miranda-Morales 4 , Claudio D'Addario 2 , Ricardo Marcos Pautassi 4
Affiliation  

Prenatal ethanol exposure (PEE) promotes ethanol consumption in the adolescent offspring accompanied by the transcriptional regulation of kappa opioid receptor (KOR) system genes. This study analysed if environmental enrichment (EE, from gestational day 20 to postnatal day 26) exerts protective effects upon PEE-modulation of gene expression, ethanol intake and anxiety responses. Pregnant rats were exposed to PEE (0.0 or 2.0 g/kg ethanol, gestational days 17-20) and subsequently the dam and offspring were reared under EE or standard conditions. PEE upregulated KOR mRNA levels in amygdala (AMY) and prodynorphin (PDYN) mRNA levels in ventral tegmental area (VTA) with the latter effect associated with lower DNA methylation at the gene promoter. These effects were normalized by exposure to EE. PEE modulated BDNF mRNA levels in VTA and Nucleus accumbens (AcbN), and EE mitigated the changes in AcbN. EE induced a protective effect on ethanol intake and preference, an effect more noticeable in males than in females, and in prenatal vehicle-treated (PV) than in PEE rats. The male offspring drank significantly less ethanol than the female offspring. The latter result suggests that the protective effect of EE on ethanol drinking may only emerge at lower levels of drinking. In the dams, PEE induced an upregulation of PDYN and KOR in AcbN. PDYN gene expression was normalized by exposure to EE. These results suggest that EE is a promising treatment to inhibit the effects of PEE. The results confirm that PEE effects are mediated by alterations in the transcriptional regulation of KOR system genes.

中文翻译:

尽早暴露于环境富集可以调节产前乙醇暴露对阿片样物质基因表达和青春期乙醇摄入的影响。

产前乙醇暴露(PEE)促进青春期后代的乙醇消耗,并伴随着κ阿片受体(KOR)系统基因的转录调控。这项研究分析了环境富集(从妊娠第20天到产后第26天)是否对PEE调节基因表达,乙醇摄入和焦虑反应有保护作用。将妊娠大鼠暴露于PEE(0.0或2.0 g / kg乙醇,妊娠第17-20天),随后将大坝和后代在EE或标准条件下饲养。PEE上调了杏仁核(AMY)中的KOR mRNA水平和腹侧被盖区(VTA)中的强啡肽(PDYN)mRNA水平,后者的作用与基因启动子处较低的DNA甲基化有关。通过暴露于EE将这些影响归一化。PEE调节了VTA和伏伏核(AcbN)中的BDNF mRNA水平,而EE减轻了AcbN的变化。EE诱导了对乙醇摄入和偏好的保护作用,这种作用在雄性中比在雌性中更明显,在产前媒介物处理(PV)中比在PEE大鼠中更明显。雄性后代比雌性后代喝更少的乙醇。后一个结果表明,EE对乙醇饮用的保护作用可能仅在较低的饮用水平下出现。在大坝中,PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。EE诱导了对乙醇摄入和偏好的保护作用,这种作用在雄性中比在雌性中更明显,在产前媒介物处理(PV)中比在PEE大鼠中更明显。雄性后代比雌性后代喝更少的乙醇。后一个结果表明,EE对乙醇饮用的保护作用可能仅在较低的饮用水平下出现。在大坝中,PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。EE诱导了对乙醇摄入和偏好的保护作用,这种作用在雄性中比在雌性中更明显,在产前媒介物处理(PV)中比在PEE大鼠中更明显。雄性后代比雌性后代喝更少的乙醇。后一个结果表明,EE对乙醇饮用的保护作用可能仅在较低的饮用水平下出现。在大坝中,PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。以及在产前媒介治疗(PV)中比在PEE大鼠中高。雄性后代比雌性后代喝更少的乙醇。后一个结果表明,EE对乙醇饮用的保护作用可能仅在较低的饮用水平下出现。在大坝中,PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。以及在产前媒介治疗(PV)中比在PEE大鼠中高。雄性后代比雌性后代喝更少的乙醇。后一个结果表明,EE对乙醇饮用的保护作用可能仅在较低的饮用水平下出现。在大坝中,PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。PEE诱导了AcbN中PDYN和KOR的上调。通过暴露于EE使PDYN基因表达标准化。这些结果表明,EE是抑制PEE作用的有前途的治疗方法。结果证实,PEE效应是由KOR系统基因转录调控的改变介导的。
更新日期:2019-12-19
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