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探索DAT异合体大鼠表原型中的跨代遗传:循环节异常和注意力脆弱性
Concetto Puzzo1, Fabiana Festucci2, Giuseppe Curcio2
1Faculty of Psychology, Università Telematica Internazionale Uninettuno, Rome, Italy; Center for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, Rome, Italy.
Behavioural brain research
|February 26, 2024
概括
多巴胺载体 (DAT) 基因变异的跨代效应影响了几代老鼠的行为. 祖父母的印记影响后代的活动和类似ADHD的症状,这表明在高多巴胺环境中对妊娠起着保护作用.
科学领域:
- 神经科学是一个神经科学.
- 行为遗传学 行为遗传学
- 发展生物学 发展生物学
背景情况:
- 多巴胺转运体 (DAT) 调节多巴胺水平,影响运动控制,奖励和母亲的行为.
- DAT的遗传淘汰 (KO) 会导致超多巴胺的状态,在老鼠中引起过度活跃和刻板印象的行为.
- 了解跨代表观遗传对于复杂特征研究至关重要.
研究的目的:
- 在大鼠中研究异构多巴胺载体 (DAT) 基因变异的跨代行为后果.
- 检查祖先基因型和性别对F1,F2和F3世代后代表型的影响.
- 探索印记的作用,特别是祖母与祖父的祖母与祖父的关系,在DAT相关的行为特征上.
主要方法:
- 研究的异合体DAT大鼠 (HETs) 来自特定的交叉繁殖策略来研究印记效应.
- 分析了不同世代 (F1,F2,F3) 的昼夜运动运动活动模式.
- 使用升高加迷宫 (EPM) 测试评估类似焦虑和类似ADHD的行为.
主要成果:
- F1一代表现出多动性,而F2一代表现出低活动性;F3 (MYX) 鼠与野生类型相似.
- 在高架+迷宫的开臂探索表明了PIX和MIX (F2) 鼠的冒险行为.
- 马特和MYX (F1/F3) 老鼠表现出类似ADHD的注意力缺失症状,注意力缺失的一般趋势从F1转移到F3.
结论:
- 与DAT相关的行为表型是跨世代遗传的,受到祖父母印记的影响.
- 这项研究表明,妊娠在高多巴胺作用子宫内具有潜在的保护作用.
- 代际模式 (奇数与偶数) 和祖先的性别影响现象型的传播,突出复杂的表观遗传遗传机制.
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