University of Colorado-Boulder, Department of Psychology and Neuroscience, Muenzinger Building, UCB 345, Boulder, CO 80309, USA.
Behav Brain Res. 2011 Jun 1;219(2):378-81. doi: 10.1016/j.bbr.2011.01.030. Epub 2011 Jan 22.
In rodents, exposure to acute inescapable, but not escapable, stress potentiates morphine conditioned place preference (CPP), an effect that is dependent upon hyperactivation of serotonin (5-HT) neurons in the dorsal raphe nucleus (DRN). Six weeks of voluntary wheel running constrains activation of DRN 5-HT neurons during exposure to inescapable stress. Six weeks of voluntary wheel running before inescapable stress blocked stress-induced potentiation of morphine CPP.
在啮齿类动物中,急性不可逃避但可逃避的应激暴露会增强吗啡条件性位置偏爱(CPP),这种效应依赖于中缝背核(DRN)5-羟色胺(5-HT)神经元的过度激活。6 周的自愿轮跑会限制在不可逃避的应激暴露期间 DRN 5-HT 神经元的激活。在不可逃避的应激之前进行 6 周的自愿轮跑会阻止应激诱导的吗啡 CPP 的增强。