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长非编码RNA Pnky 在小鼠行为中的性别特异性作用
Parna Saha1,2, Rebecca E Andersen1,2, Sung Jun Hong1,2
1Department of Neurological Surgery; University of California, San Francisco, San Francisco, CA 94143, USA.
bioRxiv : the preprint server for biology
|December 18, 2023
概括
长非编码RNA Pnky在小鼠行为中扮演性别特异性的角色. 遗传学研究表明,Pnky影响男性的恐惧回忆和女性的惊反应,证明了它在哺乳动物中的转变功能.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 数以千计的长非编码RNAs (lncRNAs) 在人类大脑中表达,异常表达与认知和精神疾病有关.
- 虽然一些lncRNAs调节神经发育和功能,但很少有基因与动物行为有关,特别是通过转基因作用机制.
- 众所周知,Pnky是一种保存的神经lncRNA,可以调节大脑发育.
研究的目的:
- 通过使用遗传策略,研究神经lncRNA Pnky在哺乳动物行为中的作用.
- 确定Pnky是否在行为中具有性别特异性功能,并通过跨作用机制运行.
- 为 lncRNA 参与成年哺乳动物行为及其与情绪和认知障碍的潜在联系提供遗传证据.
主要方法:
- 利用了小鼠遗传策略,包括Pnky-knockout (KO) 模型.
- 评估了雄性和雌性Pnky-KO小鼠的行为表型,重点关注诱导恐惧回忆,声学惊慌响应 (ASR) 和前脉冲抑制 (PPI).
- 采用一种细菌人造染色体 (BAC) 转基因来表达Pnky并评估行为表型的救援.
主要成果:
- 雄性Pnky-KO小鼠在提示性恐惧回忆方面表现出缺陷,这是一种联想性记忆形式.
- 雌性Pnky-KO小鼠显示ASR增加和PPI降低,这些行为与情感障碍相关.
- 在雌性Pnky-KO小鼠中,Pnky的转基因表达成功逆转了ASR表型,证实了Pnky的转基因作用功能.
结论:
- lncRNA Pnky在小鼠行为中具有独特的性别特异性作用,影响关联记忆和惊吓反应.
- 基功能在成年哺乳动物中调节特定的行为,在lncRNAs和行为之间提供遗传联系.
- 这些发现为了解 lncRNAs 如何与认知和情绪障碍相关,提供了至关重要的知识.
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