产前大麻素暴露引发了与减少PSA-NCAM表达,改变的谷氨酸信号和海马突突触可塑性适应相关的记忆缺陷
Priyanka D Pinky1,2, Jenna Bloemer1,3, Warren D Smith1
1Department of Drug Discovery and Development, Auburn University, Auburn, AL 36849, USA.
Cells
|November 10, 2023
概括
在大鼠中产前大麻素暴露 (PCE) 损害了青少年后代.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 怀孕期间大麻的使用量正在增加,对胎儿神经发育构成风险.
- 产前大麻素暴露 (PCE) 可以导致持久的认知和神经功能变化.
- 了解PCE引起的记忆缺陷背后的机制至关重要.
研究的目的:
- 调查PCE后青少年后代的学习和记忆缺陷背后的机制.
- 在海马体中识别特定的突触和分子变化.
主要方法:
- 怀孕的老鼠接受了合成大麻素激动剂 (WIN55,212-2).
- 青少年后代接受了行为,电生理学和免疫化学分析.
- 评估了海马突触可塑性,包括长期强化 (LTP) 和长期抑郁 (LTD).
主要成果:
- 在青少年后代中,PCE导致海马体依赖的记忆缺陷.
- 突触可塑性发生变化,在Schaffer附带-CA1突触中减少LTP和增强LTD.
- PCE降低了神经细胞粘附分子 (NCAM) 和聚化-NCAM (PSA-NCAM) 表达,影响了GluN2A/GluN2B信号传输.
结论:
- 通过改变NCAM和PSA-NCAM表达,PCE破坏海马突触可塑性,影响GluN2A/GluN2B信号传递.
- 外源性PSA给药部分恢复了LTP,表明其治疗潜力.
- 这些发现提供了关于PCE对记忆和潜在治疗点的影响的见解.
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