人类NPY表达的遗传变异会影响应激反应和情绪
Zhifeng Zhou1, Guanshan Zhu, Ahmad R Hariri
1Laboratory of Neurogenetics, NIAAA, NIH, Bethesda, Maryland 20892, USA.
Nature
|April 4, 2008
概括
神经Y (NPY) 的遗传变异会影响个人对压力和情绪挑战的反应. 较低的NPY表达与焦虑的增加和大脑活动的改变有关,影响了应激弹性.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 精神病学是一个精神病学.
背景情况:
- 压力反应的个体差异受到影响,影响行为和大脑代谢的遗传因素.
- 神经Y (NPY) 是一种具有抗焦虑性质的关键神经递质,在压力期间释放出来,在与情绪相关的大脑区域中大量存在.
研究的目的:
- 研究NPY遗传变异 (哈普类型) 在预测大脑对情绪和压力挑战的反应中的作用.
- 探索NPY单质类型,NPY表达水平和特征焦虑之间的相关性.
主要方法:
- 在死后脑组织和淋巴细胞中分析NPY信使RNA (mRNA) 水平.
- 对血NPY水平的测量.
- 评估大脑激活模式 (杏仁体,阿片类神经传递) 响应情绪和压力刺激.
- 在NPY促进区内对特定单核酸多态 (SNP rs16147) 的体外和体内分析.
主要成果:
- NPY单质类型准确地预测了大脑和血中的NPY表达水平.
- 较低的NPY表达与高度的杏仁体激活与情绪刺激相关.
- 减少NPY表达与减少的应激弹性有关,由改变的内源性阿片类药物系统激活表明.
结论:
- 哈普洛型驱动的NPY表达是个人应激反应和焦虑水平差异的重要预测因素.
- 这些发现阐明了抗压能力的遗传基础及其对疾病风险的影响.
- 在NPY促进器区域的特定SNP (rs16147) 显著影响NPY表达,并可能解释实体内变化的很大一部分.
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