在异卵性DAT大鼠的行为表现型的表征基于家谱
Gioia Zanfino1, Concetto Puzzo1,2, Vincenzo de Laurenzi3,4
1Center for Behavioral Sciences and Mental Health, Istituto Superiore di Sanità, 00161 Rome, Italy.
Biomedicines
|September 28, 2023
概括
多巴胺载体基因表原型的父母起源影响子孙的跨代行为. 母子宫环境显著影响大鼠中强迫症表型的发展.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 行为科学 行为科学
背景情况:
- 多巴胺是调节运动控制,奖励,认知和睡眠-清醒周期的关键神经递质.
- 多巴胺载体 (DAT) 基因 (SLC6A3) 负责多巴胺的再吸收.
- 多巴胺载体淘汰 (DAT-KO) 鼠表现出过度活跃,记忆力缺陷和改变的昼夜节律.
研究的目的:
- 为了研究父母的起源和子宫环境对多巴胺载体基因表观型的跨代影响.
- 确定代际表观遗传修饰如何影响行为表型,包括对母亲的照顾.
- 阐明母亲子宫在调节DAT表观型效应中的作用.
主要方法:
- 生成专门的老鼠系 (MAT-HETs,QULL) 来研究父母和祖父母的表观遗传.
- 涉及野生类型 (WT),DAT-KO,DAT-HET,MAT-HET和QULL表原型的交叉繁殖实验.
- 跨越三代人的行为分析,重点关注母亲的照顾和强迫症表型的出现.
主要成果:
- 来自MAT-HET-dam × QULL-sire繁殖的后代表现出强迫和痴迷的行为.
- QULL表观型的表观遗传状态受到KO祖母子宫的影响,显著影响了后代的行为.
- 行为异常在几代人之间有所不同,与基因谱系中任何一个等位基因的子宫暴露相关.
结论:
- 父母的起源和母亲的子宫环境在塑造与多巴胺载体基因相关的行为结果方面发挥着关键作用.
- 表观遗传修饰,特别是那些受产前子宫环境影响的,可以导致行为特征的跨代遗传.
- 需要进一步的研究才能充分理解神经发育障碍中遗传学,表观遗传学和行为之间的复杂相互作用.
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