胎盘胰岛素样生长因子1缺乏驱动自闭症相关的行为变化与性别特定的脆弱性
bioRxiv : the preprint server for biology
|January 16, 2026
概括
胎盘胰岛素样生长因子1 (IGF1) 对胎儿大脑发育至关重要. 它的不足导致特定性别的神经发育和行为变化,可能增加自闭症风险.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 围产期的逆境,如早产,可以减少胎盘的支持,包括必不可少的激素,如胰岛素样生长因子1 (IGF1).
- 降低IGF1和早产与神经发育障碍的风险增加有关,例如自闭症谱系障碍.
- 胎盘IGF1缺陷在驱动这些神经发育风险方面的具体作用尚不清楚.
研究的目的:
- 调查胎盘IGF1缺陷和神经发育结果之间的因果关系.
- 检查胎盘IGF1缺乏对胚胎前脑发育和产后神经行为的性别特异性影响.
主要方法:
- 在小鼠中利用胎盘向的CRISPR产生IGF1不足.
- 评估性别特定的胚胎前脑发育,包括结构和转录组变化.
- 评估后产子的神经行为轨迹,使用学习,运动和情感任务,以及神经立体学.
主要成果:
- 胎盘IGF1不足减少了胚胎前脑生长和两性细胞群.
- 转录组分析揭示了性别特异性变化,男性的自闭症相关途径下调,女性的自闭症风险基因丰富.
- 男性后代在运动学习方面表现出缺陷,并增加了刻板印象的行为,而女性则表现出明显的行为变化和最小的结构变化.
结论:
- 胎盘IGF1对于后代前脑正常发育至关重要.
- 早期的胎盘IGF1缺陷导致持续的,性别特异的神经行为效应.
- 研究结果提供了关于自闭症风险机制的见解,以及早期胎盘缺陷后的干预措施的潜在目标.
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