青少年小鼠的甲基胺受条件的位置偏好:性别和菌株之间的相互作用
Lewis Nunez Severino1,2,3, Andre B Toussaint1,4, Rachael M Langa1
1Department of Psychology, Hunter College, City University of New York, USA.
Journal of psychopharmacology (Oxford, England)
|February 28, 2026
概括
在青少年小鼠中,甲基胺奖励效应显示出显著的性别和菌株差异. 核心和海马体中的神经回路反应各不相同,影响行为敏感化.
科学领域:
- 神经科学是一个神经科学.
- 青少年药理学 青少年药理学
- 行为遗传学 行为遗传学
背景情况:
- 青少年使用甲基胺 (METH) 的女性比男性更为普遍.
- 动物研究表明,METH的强化作用存在性别差异,但青少年的神经电路反应仍未得到充分研究.
- 很少有研究探讨了青春期METH作用背后的神经回路中的性别差异.
研究的目的:
- 为了研究METH在青少年小鼠中的奖励效应的性别差异.
- 为了识别相关神经回路的性别和应变依赖的变化.
- 检查METH对用于转基因研究的两种常见小鼠菌株 (129Sv/Ev和C57Bl/6) 的影响.
主要方法:
- 在青少年雄性和雌性129Sv/Ev和C57Bl/6小鼠中评估METH诱导的条件化位置偏好 (CPP).
- 用1mg/kg的METH诱导CPP.
- 经过条件化后,在核 (NAc) 和海马体 (CA1) 中量化c-Fos蛋白表达.
主要成果:
- C57Bl/6雌性,但不是雄性,表现出METH诱导的CPP.
- 129Sv/Ev雄性,但不是雌性,显示METH诱导的CPP.
- 与对照人群相比,显示CPP的两种菌株在NAc和CA1中增加了c-Fos+细胞.
- 只有在129Sv/Ev的男性身上观察到行为敏感性.
结论:
- 在青少年小鼠中,METH的有益效果取决于性别和遗传背景.
- 对METH的神经和行为反应的结果是性别特异性和遗传因素之间的相互作用.
- 这些发现将为未来的METH研究,特别是转基因模型中选择小鼠菌株提供信息.
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