跨代表观遗传早期生活压力从祖母通过父亲的游戏:损坏的社会认知和减少对DAT-HET老鼠中厌恶预测者的反应性
Eleonora D'Antonio1, Gioia Zanfino2, Concetto Puzzo2,3,4,5
1Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
Biology
|September 27, 2025
概括
祖先的早期生活压力可以在表观遗传上改变后代的行为,影响社会认知和威胁反应. 这项研究表明,由于遗传的表观遗传变化,第四代大鼠表现出受损的社会认知能力和减弱的恐惧反应.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 跨代表观遗传为早期生活压力提供了一种机制,可以在没有直接创伤的情况下影响后代的行为.
- 在这种情况下,微妙的行为变化,特别是社会和情绪处理,是很难理解的.
研究的目的:
- 为了研究来自受虐待祖先的第四代异合体多巴胺转运体 (DAT-HET) 鼠的行为特征.
- 评估抑制控制,社会认知和社会偏好方面的变化.
主要方法:
- 采用了多代大鼠模型 (SIKK组),其祖先在幼年时遭受虐待.
- 采用了信号/避免惩罚 (SLAP) 任务,诱导偏好测试 (EPT) 和社会识别测试 (SRT).
- 在行为任务中比较SIKK老鼠与控制 (SX) 老鼠.
主要成果:
- 在SLAP任务中,SIKK大鼠表现出被动回避的获取速度较慢,这表明对厌恶线索的敏感性降低.
- 在EPT中,对照大鼠比SIKK大鼠更喜欢对照同类,这表明表观遗传改变动物的社会吸引力减少.
- 在SRT中,SIKK老鼠无法区分新型与熟悉的同类,从而显示出社会认知功能受损.
结论:
- 被虐待祖先的第四代后代表现出独特的行为表型,包括高度的威胁反应能力和社会偏好和认知的缺陷.
- 这些遗传性行为变化与边缘多巴aminergic 电路,特别是前额叶皮层 (PFC) 的功能障碍有关.
- 这项研究提供了一个模型来理解祖先的逆境如何塑造适应性行为,并有助于精神疾病的脆弱性.
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