电子烟对前额叶皮质,腹膜区域和核的年龄相关影响
Brandon J Henderson1, Lauren E Young2, Nathan A Olszewski2
1Department of Biomedical Sciences, Joan C Edwards School of Medicine at Marshall University, Huntington, WV, USA. Hendersonbr@marshall.edu.
Communications biology
|November 21, 2024
概括
青少年接触电子尼古丁输送系统 (ENDS) 增加了雄性小鼠的大脑刺激性和寻找药物的行为,突出了中部前额叶皮质在青少年尼古丁依赖中的作用.
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:
- 电子尼古丁输送系统 (ENDS) 非常受欢迎,特别是在青少年中,因为它具有风味.
- 蒸发尼古丁对青少年大脑发育,特别是前额叶皮层的影响还未得到充分研究.
- 需要进行临床前研究,以了解ENDS暴露的年龄相关影响.
研究的目的:
- 通过ENDS调查青少年与成人尼古丁暴露对神经元功能和药物自我管理的影响.
- 为了比较青少年和成年暴露的小鼠之间的行为和神经生理结果.
- 确定潜在的大脑区域和机制,是青少年尼古丁依赖的基础.
主要方法:
- 在青少年和成年男性和女性C57BL/6J小鼠中使用了20个会话的e-Vape®自我管理 (EVSA) 试验.
- 在急性脑部切片上进行了补丁电生理学和快速扫描循环电压测量.
- 分析了中枢前额叶皮层 (mPFC) 中的神经元内在兴奋度和内腔体区域 (VTA) 中的尼古丁性乙胆受体 (nAChR) 表达.
主要成果:
- 青少年暴露的雄性小鼠比成人暴露的雄性表现出更大的强化相关行为;雌性表现出类似的行为.
- 暴露于青少年的小鼠在mPFC金字塔神经元中表现出增加的内在兴奋性.
- 在青少年暴露的小鼠中,mPFC的神经刺激与自我管理行为相关,但不是成人暴露的小鼠.
- 在成年暴露于尼古丁的小鼠中,VTA nAChR上调与尼古丁自我管理相关,但未暴露于青少年的小鼠.
结论:
- 青少年通过ENDS接触尼古丁会改变发育中的大脑中的神经元功能.
- 中部前额叶皮质在青少年的尼古丁依赖中发挥着至关重要的作用,由兴奋度和行为之间的相关性证明.
- 对尼古丁的神经生物学反应的年龄相关差异可能会影响成的轨迹.
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