在VTA的生命早期应激激活细胞中,持久的开放色素状态
Rebekah L Rashford1, Michael DeBerardine1, Shu Dan1
1Princeton Neuroscience Institute, Princeton University, Princeton, NJ, 08544, USA.
Scientific reports
|October 15, 2025
概括
生命早期的压力会在大脑的腹膜区域 (VTA) 中产生持久的表观遗传变化. 这种分子记忆为应激激活的细胞提供了原始信息,从而增加了对压力和精神疾病的终身脆弱性.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 精神病学是一个精神病学.
背景情况:
- 早期生活压力 (ELS) 通过使个人对随后的压力因素敏感,增加了患精神疾病的终身风险.
- 腹膜区域 (VTA) 是一个关键的大脑区域,与应激反应和心理健康有关.
- ELS在VTA中诱导长期的分子变化,这表明表观遗传原始化作为应激敏感性的机制.
研究的目的:
- 调查早期生活压力的长期影响VTA内的染色质结构.
- 了解ELS诱导的VTA表观遗传修饰如何促进终身压力敏感性.
主要方法:
- 使用活动依赖的细胞标记与ATAC测序结合 (使用测序测定转化酶可访问染色质的测试).
- 在ELS暴露后,分析了VTA细胞中的染色质可访问性变化.
主要成果:
- 在成年后,ELS会导致染色质的持续开放,特别是在VTA的压力激活细胞中.
- 这种在cis调节元件上的染色质重塑,包括增强剂,增强了对成人压力的转录反应.
- 在ELS响应的VTA细胞内证明了增强剂原始化.
结论:
- 通过持续的染色质开放,ELS在VTA中建立了一种分子记忆形式.
- 在ELS-响应的VTA细胞中增强原始化作为一种生物学机制,是终身压力敏感性的基础.
- 这些发现为了解早期生活压力对心理健康的长期后果提供了分子基础.
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