mPFC DUSP1调解了青少年可卡因暴露引起的成年期对药物的更高敏感性
Xiaoyan Wei1, Jiasong Chang1, Zhen Cheng1
1Department of Human Anatomy and Histoembryology, Nanjing University of Chinese Medicine, Nanjing, China.
EMBO reports
|August 3, 2023
概括
青少年接触可卡因会使大脑开始工作,使成年小鼠对可卡因更敏感. 这种高度敏感性与中部前额叶皮质DUSP1表达的变化有关,这表明它是成治疗的目标.
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:
- 青少年对可卡因的滥用增加了以后生活中发展成的风险.
- 这种增加的敏感性背后的精确分子机制尚未完全理解.
研究的目的:
- 在青少年暴露于可卡因 (ACE) 的小鼠中,研究双重特异性蛋白激酶酸酶-1 (DUSP1) 在中间前额皮层 (mPFC) 中的作用.
- 为了确定DUSP1是否调节了青少年暴露后成年人对可卡因的敏感性.
主要方法:
- 青少年暴露于可卡因 (ACE) 的雄性小鼠模型的建立.
- 评估成年期在低于值可卡因剂量 (sdC) 治疗后的有条件位置偏好 (CPP).
- 对CaMKII阳性神经元活动,DUSP1mRNA和蛋白质水平以及mPFC中的DUSP1活动的分析.
- 在CaMKII阳性神经元中操纵DUSP1表达 (过度表达和耗尽).
主要成果:
- 与对照组不同的是,ACE小鼠在接受sdC治疗后在成年期表现出CPP.
- 在mPFC中,ACE小鼠表现出增加的CaMKII阳性神经元激活,更高的DUSP1mRNA和更低的DUSP1活性/表达.
- 在mPFC神经元中过度表达DUSP1阻断了sdC诱导的CPP,而耗尽DUSP1则增强了它.
- ERK1/2信号可能是DUSP1.1的下游目标.
结论:
- mPFC DUSP1在青春期暴露于可卡因的成年小鼠中观察到的对可卡因的高度敏感性中发挥着关键作用.
- DUSP1代表了一个潜在的药理目标,用于预测或治疗由青少年使用物质引起的药物敏感性.
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