Gonçalves Luciana Kneib, da Silva Ivy Reichert Vital, Cechinel Laura Reck, Frusciante Marina Rocha, de Mello Alexandre Silva, Elsner Viviane Rostirola, Funchal Claudia, Dani Caroline
Programa de Pós Graduação em Biociências e Reabilitação do Centro Universitário Metodista-IPA, Porto Alegre, Rio Grande do Sul, Brazil.
Programa de Pós Graduação em Ciências Biológicas: Fisiologia, Porto Alegre, Rio Grande do Sul, Brazil.
Neurosci Lett. 2017 Nov 20;661:29-32. doi: 10.1016/j.neulet.2017.09.042. Epub 2017 Sep 23.
This study aimed to investigate the impact of maternal consumption of a hyperlipid diet and grape juice on global histone H4 acetylation levels in the offsprinǵs hippocampus at different stages of development. During pregnancy and lactation of offspring, dams were divided into 4 groups: control diet (CD), high-fat diet (HFD), control diet and purple grape juice (PGJCD) and purple grape juice and high-fat diet (PGJHFD). Male Wistar rats were euthanized at 21days of age (PN21, adolescents) and at 50days of age (PN50, adults). The maternal consumption of grape juice increased global histone H4 acetylation levels in hippocampus of adolescents pups (PN21), an indicative of enhanced transcriptional activity and increased gene expression. On the other hand, the maternal high-fat diet diminished significantly this epigenetic marker in the adult phase (PN50), suggesting gene silencing. These preliminary findings demonstrated that the maternal choices are able to induce changes on histone H4 acetylation status in hippocampus of the offspring, which may modulate the expression of specific genes. Interestingly, this response occurs in an age and stimuli-dependent manner and strongly reinforce the importance of maternal choices during gestation.
本研究旨在调查母体食用高脂饮食和葡萄汁对后代海马体在不同发育阶段的整体组蛋白H4乙酰化水平的影响。在后代的怀孕和哺乳期,母鼠被分为4组:对照饮食(CD)、高脂饮食(HFD)、对照饮食加紫葡萄汁(PGJCD)和紫葡萄汁加高脂饮食(PGJHFD)。雄性Wistar大鼠在21日龄(PN21,青少年期)和50日龄(PN50,成年期)时被安乐死。母体食用葡萄汁可增加青少年幼崽(PN21)海马体中的整体组蛋白H4乙酰化水平,这表明转录活性增强且基因表达增加。另一方面,母体高脂饮食在成年期(PN50)显著降低了这种表观遗传标记,表明基因沉默。这些初步研究结果表明,母体的选择能够诱导后代海马体中组蛋白H4乙酰化状态的变化,这可能会调节特定基因的表达。有趣的是,这种反应以年龄和刺激依赖的方式发生,并有力地强化了孕期母体选择的重要性。