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首页> 外文期刊>Journal of chemical neuroanatomy >Neurobehavioral and neurophysiological effects of prolonged osmotic stress in rats: A focus on anxiety state and pain perception
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Neurobehavioral and neurophysiological effects of prolonged osmotic stress in rats: A focus on anxiety state and pain perception

机译:大鼠长期渗透胁迫的神经兽性和神经生理学效应:焦虑症态度和疼痛感知

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This study examined the effect of prolonged water deprivation, in rat, on 5-HT and TH- immuno-expression in Dorsal Raphe Nucleus (DRN), Substantia Nigra pars compacta (SNc), Ventral Tegmental Area (VTA), and Magnus Raphe Nucleus (MRN). In parallel, we evaluated the anxiety state and pain perception in dehydrated rats. Our Findings revealed that dehydrated rats exhibited more preference for the dark compartment, suggesting that prolonged water deprivation is associated to an anxiogenic effect. After one week, 5 H T IR in the DRN of dehydrated rates showed a significant decrease. This was reversed to a significant increase post week 2 of dehydration. Our findings also demonstrated that TH-IR in DRN, MRN, SNc and VTA neuronal systems is significantly and gradually enhanced after 1-and-2-week osmotic stress. In addition, our results proved that all dehydrated rats were characterized by a significant and proportional rise of the reaction time to the nociceptive response in the hot plate test, as water deprivation duration increased, suggesting that dehydration caused a significant decrease in pain perception. Finally, the data described here clearly showed the implication of serotonin and dopamine neurotransmitter systems in the resistance to osmotic stress. Therefore, in this study, such central impairments were traduced by a few peripheral outcomes manifested by changes in mood state and nociception.
机译:本研究检测了延长水剥夺的效果,在大鼠中,在背甲核(DRN)中,体内NIGRA的5-HT和TH-免疫表达,腹膜菌,腹带区域(VTA)和Magnus Raphe核(MRN)。同时,我们评估了脱水大鼠中的焦虑状态和疼痛感知。我们的研究结果显示,脱水大鼠对黑暗隔室表现出更多的偏好,表明延长的水剥夺与焦虑作用有关。在一周之后,脱水率DRN中的5小时IR显示出显着降低。这逆转到脱水的第2周的显着增加。我们的研究结果还证明了在1-2周渗透压力后显着且逐渐增强了DRN,MRN,SNC和VTA神经元系统中的TH-IR。此外,我们的结果证明,随着水剥夺持续时间的增加,所有脱水大鼠都是对热板试验中的伤害性反应的重大和比例升高,表明脱水导致疼痛感性显着降低。最后,这里描述的数据清楚地表明血清素和多巴胺神经递质系统在抗渗透胁迫下的含义。因此,在这项研究中,通过情绪状态和伤害效果的变化表现出了一些外周期外的外围成果来进行这种中央损伤。

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