前额前环Homer1调节可卡因诱导的突触和行为适应
Yun Chen1,2, Zhongyu Zhang1, Xianfeng Li3
1National Institute on Drug Dependence and Beijing Key Laboratory on Drug Dependence Research, Peking University, Beijing, 100191, China.
Molecular psychiatry
|November 8, 2025
概括
循环RNAs (circRNAs),特别是circHomer1,在物质使用障碍 (SUD) 中发挥着关键作用. 大脑中较低的circHomer1水平增加了可卡因奖励,这表明circHomer1是成治疗的潜在目标.
科学领域:
- 神经精神病学医学 神经精神病学医学
- 分子神经科学 分子神经科学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 药物使用障碍 (SUD) 是一个重大的挑战,具有难以捉摸的分子机制.
- 循环RNAs (circRNAs) 与SUD病理生理学有关.
- circHomer1,一个神经元丰富的circRNA,在暴露于可卡因后显示出改变的表达.
研究的目的:
- 研究circHomer1在可卡因诱导的奖励和突触可塑性中的作用.
- 确定circHomer1在可卡因成中的功能细胞类型特异性和机制性途径.
主要方法:
- 使用反复暴露于可卡因和条件偏好的地方 (CPP) 的老鼠模型.
- 采用病毒介导的基因调节技术来操纵circHomer1水平.
- 评估了前极皮质中的分子和细胞变化,包括树突性脊柱形态和突触活动.
主要成果:
- 重复暴露在可卡因下调了在大鼠和患有可卡因使用障碍的人类患者的前临床皮质中的circHomer1表达.
- 提高circHomer1减弱了可卡因诱导的CPP,而抑制则增强了奖励效应,特别是在刺激神经元中.
- circHomer1恢复正常化了树突脊柱密度和可卡因暴露引起的刺激后突触电流频率缺陷.
- circHomer1通过多巴胺D1受体信号调节可卡因奖励,并对精神兴奋剂表现出特异性.
结论:
- circHomer1是可卡因奖励和相关的突触适应的关键调节者.
- 循环Homer1的下调有助于可卡因的奖励作用.
- circHomer1代表了一个新的分子标,用于开发治疗策略来对抗精神兴奋剂成.
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