在前临床前额叶皮层中的基因组脱乙酶5限制了与上下文相关的可卡因寻找
bioRxiv : the preprint server for biology
|September 30, 2024
概括
在前临床皮质中的基因组脱乙酶5 (HDAC5) 限制了与可卡因相关的学习,降低了物质使用障碍的复发风险. 这种表观遗传调节器会影响突触可塑性和奖励回路.
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
- 成研究 研究成研究
背景情况:
- 重复使用可卡因导致神经适应支持渴望和复发物质使用障碍 (SUDs).
- 与药物使用相关的环境线索可以在SUD患者中引发复发.
- 药物背景关联背后的分子机制仍然不清楚.
研究的目的:
- 为了研究基因组脱乙酶5 (HDAC5) 在前临界 (PrL) 和下临界 (IL) 皮层在情境相关的可卡因寻找中的作用.
- 阐明HDAC5调节这些关联的分子机制.
主要方法:
- 使用了一种老鼠静脉可卡因自给药 (SA) 模型.
- 采用病毒分子工具,化学遗传学,RNA测序,电生理学和免疫组织化学.
- 在PrL和IL皮层中操纵HDAC5水平.
主要成果:
- 在PrL中减少HDAC5增加了与上下文相关的可卡因寻找.
- 在PrL中过度表达HDAC5减少了与上下文相关的可卡因寻求,而不是糖寻求.
- HDAC5和可卡因SA改变了PrL中的基因表达,影响了突触可塑性和抑制性传播.
结论:
- PrL HDAC5在限制可卡因相关环境中形成的关联方面发挥着至关重要的作用.
- HDAC5影响PrL中的刺激/抑制平衡,可能是通过突触基因的表观遗传调节.
- HDAC5是奖励回路神经适应的关键调节者,与SUD复发触发器相关.
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