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首页> 外文期刊>Neurological Research: An Interdisciplinary Quarterly Journal >Activation and blockade of dorsal hippocampal Serotonin(6) receptors regulate anxiety-like behaviors in a unilateral 6-hydroxydopamine rat model of Parkinson's disease
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Activation and blockade of dorsal hippocampal Serotonin(6) receptors regulate anxiety-like behaviors in a unilateral 6-hydroxydopamine rat model of Parkinson's disease

机译:背侧海马血清素(6)受体在单侧6-羟基多胺大鼠模型中调节焦虑样行为的帕金森病

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摘要

Objectives: This study aimed to investigate the effect of serotonin(6) (5-HT6) receptors in the dorsal hippocampus (dHip) on the regulation of Parkinson's disease (PD)-associated anxiety. Methods: We examined whether intra-dHip injection of both 5-HT6 receptor agonist and antagonist was involved in the regulation of anxiety-like behaviors in sham-operated rats and rats with unilateral 6-hydroxydopamine (6-OHDA) lesions of the medial forebrain bundle by the open-field and elevated plus maze (EPM) tests. Four weeks after injection of 6-OHDA, the concentrations of dopamine (DA), noradrenaline (NA) and 5-hydroxytryptamine (5-HT) in relative related brain regions were measured by reverse-phase high-performance liquid chromatography. Results: In sham-operated rats, intra-dHip injection of both 5-HT6 receptor agonist WAY208466 (3 and 6 mu g/rat) and antagonist SB258585 (4 mu g/rat) increased the percentage of time spent in the center area in the open-field test and percentages of open arm entries and open arm time in EPM test, indicating that induced anxiolytic effects. In the lesioned rats, WAY208466 (1.5, 3 and 6 mu g/rat) produced anxiolytic responses, whereas SB258585 (2 and 4 mu g/rat) produced anxiogenic effects. Neurochemical results showed that intra-dHip injection of WAY208466 (6 mu g/rat) decreased NA level in the amygdala, and SB258585 (4 mu g/rat) increased DA levels in the dHip and vHip in sham-operated rats, whereas WAY208466 increased DA levels in the dHip, vHip, and amygdala in the lesioned rats. Discussion: dHip 5-HT6 receptors are involved in the regulation of anxiety-like behaviors, which may be mediated through different neurochemical mechanisms, and the dHip is an important site involved in these effects.
机译:目的:本研究旨在探讨苏罗顿素(6)(5-HT6)受体在背部海马(DHIP)对帕金森病(PD)的调控的影响。方法:我们检查了在假手术大鼠和单侧6-羟基多胺(6-OHDA)病变的中间前脑的单侧6-羟基多胺(6-OHDA)病变中的焦虑症行为的调节患者患有5-HT6受体激动剂和拮抗剂的内含内的焦虑行为的调节由开放场和升高的Plus Maze(EPM)测试捆绑。注射6-OHDA后四周,通过反相高效液相色谱法测量相对相关脑区中的多巴胺(DA),去甲肾上腺素(NA)和5-羟基 - 羟基(5-HT)的浓度。结果:在假手术大鼠中,5-HT6受体激动剂Way208466(3和6μg/大鼠)和拮抗剂Sb258585(4μg/大鼠)的血清内注射增加(4μg/大鼠)增加了中心区域所花费的时间百分比开放式测试和开放式臂条目的百分比和开放式ARM时间在EPM测试中,表明诱导抗焦虑作用。在损伤的大鼠中,Way208466(1.5,3和6μg/大鼠)产生抗焦虑反应,而Sb258585(2和4μg/大鼠)产生焦虑作用。神经化学研究结果表明,在杏仁达拉的NA208466(6μg/大鼠)的肝癌中,DAP水平降低,SB258585(4 mu g /大鼠)在假手术大鼠中增加了DA水平,而608466则增加在损伤的大鼠中,瓦希和杏仁达的DA水平。讨论:DHIP 5-HT6受体参与调节焦虑的行为,这可能通过不同的神经化学机制介导,而DHIP是参与这些影响的重要部位。

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  • 作者单位

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

    Xi An Jiao Tong Univ Hlth Sci Ctr Sch Basic Med Sci Dept Physiol &

    Pathophysiol Yan Ta Xi Lu 76;

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  • 正文语种 eng
  • 中图分类 神经病学;
  • 关键词

    Parkinson's disease; anxiety; dorsal hippocampus; 5-HT6 receptors;

    机译:帕金森病;焦虑;背海马;5-HT6受体;

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