在CHRNB2中罕见的编码变体降低了吸烟的可能性
Veera M Rajagopal1, Kyoko Watanabe1, Joelle Mbatchou1
1Regeneron Genetics Center, Tarrytown, NY, USA.
Nature genetics
|June 12, 2023
概括
在CHRNB2中罕见的遗传变异可以防止重度吸烟. 尼古丁乙胆受体子单元β-2的这一发现为治疗尼古丁成提供了新的途径.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 关于吸烟行为的人类遗传研究主要集中在常见变体上.
- 研究罕见的编码变体为识别用于戒烟的新药标提供了潜在的潜力.
研究的目的:
- 进行一个全外体关联研究 (EWAS),以确定影响吸烟行为的遗传因素.
- 探索CHRNB2中罕见变异的作用,该变异在吸烟表型中编码alpha4beta2尼古丁乙胆受体的β-2亚单元.
主要方法:
- 在一个多达749,459个个体的大队伍中对吸烟表型进行了一项外基因组范围的关联研究 (EWAS).
- 在CHRNB2.2中分析了罕见的预测功能丧失和可能有害的误解变体.
- 在同一基因中调查了一种独立的常见变异关联 (rs2072659).
主要成果:
- 在罕见的CHRNB2变体和重度吸烟之间发现了显著的保护性关联 (OR=0.65,P=1.9×10−8).
- 总的来说,CHRNB2的罕见变异与重度吸烟的几率下降35%有关.
- 在CHRNB2中确定了一种独立的常见变异关联在保护方向 (rs2072659,OR=0.96,P=5.3×10−6),表明一个等位列序列.
结论:
- 人类的遗传发现证实了几十年来在小鼠身上进行的关于β-2亚单元在尼古丁反应中的作用的实验观察.
- 这一遗传发现强调了CHRNB2作为开发尼古丁成新药物治疗的有希望的目标.
- 未来的药物设计工作应该考虑在戒烟疗法中针对大脑中的CHRNB2.
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