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首页> 外文期刊>The European Journal of Neuroscience >Effect of a single and repeated stress exposure on gene expression of catecholamine biosynthetic enzymes in brainstem catecholaminergic cell groups in rats
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Effect of a single and repeated stress exposure on gene expression of catecholamine biosynthetic enzymes in brainstem catecholaminergic cell groups in rats

机译:一次和多次应激暴露对大鼠脑干儿茶酚胺能细胞群中儿茶酚胺生物合成酶基因表达的影响

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摘要

Brainstem catecholaminergic neurons significantly participate in the regulation of neuroendocrine system activity, particularly during stressful conditions. However, so far the precise quantitative characterisation of basal and stress-induced changes in gene expression and protein levels of catecholaminergic biosynthetic enzymes in these neurons has been missing. Using a quantitative reverse transcription-polymerase chain reaction method, we investigated gene expression of catecholamine biosynthetic enzymes in brainstem noradrenergic and adrenergic cell groups in rats under resting conditions as well as in acutely and repeatedly stressed animals. For the first time, we described quantitative differences in basal levels of catecholamine biosynthetic enzyme mRNA in brainstem catecholaminergic ascending and descending projecting cell groups. Moreover, we found and defined some differences among catecholaminergic cell groups in the time-course of mRNA levels of catecholaminergic enzymes following a single and especially repeated immobilisation stress. The data obtained support the assumption that brainstem catecholaminergic cell groups represent a functionally differentiated system, which is highly (but specifically) activated in rats exposed to stress. Therefore, potential interventions for the treatment of stress-related diseases need to affect the activity of brainstem catecholaminergic neurons not uniformly but with some degree of selectivity.
机译:脑干儿茶酚胺能神经元明显参与神经内分泌系统活动的调节,特别是在压力条件下。但是,到目前为止,这些神经元中儿茶酚胺能生物合成酶的基因表达和蛋白质水平的基础和应激诱导的变化的精确定量表征尚缺乏。使用定量逆转录-聚合酶链反应方法,我们研究了静息状态下大鼠以及急性和反复应激动物脑干去甲肾上腺素能和肾上腺素能细胞群中儿茶酚胺生物合成酶的基因表达。首次,我们描述了脑干儿茶酚胺能上升和下降投射细胞群中儿茶酚胺生物合成酶mRNA基础水平的定量差异。此外,我们发现并定义了单一(尤其是反复)固定应激后儿茶酚胺能细胞的时间变化过程中儿茶酚胺能细胞群之间的一些差异。获得的数据支持以下假设:脑干儿茶酚胺能细胞群代表功能分化的系统,该系统在暴露于应激的大鼠中被高度(但特异性地)激活。因此,用于治疗与压力有关的疾病的潜在干预措施需要不均匀地影响脑干儿茶酚胺能神经元的活动,而是具有一定程度的选择性。

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