RGS2 mediates the anxiolytic effect of oxytocin

RGS2 mediates the anxiolytic effect of oxytocin
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RGS2介导催产素的抗焦虑作用

DOI:
10.1016/j.brainres.2012.03.012
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发表时间:
2012
期刊:
影响因子:
2.9
通讯作者:
Tomizawa K
Tomizawa K
中科院分区:
医学3区
文献类型:
--
作者:
Okimoto N;Bosch OJ;Slattery DA;Pflaum K;Matsushita H;Wei FY;Ohmori M;Nishiki T;Ohmori I;Hiramatsu Y;Matsui H;Neumann ID;Tomizawa K

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神经肽催产素(OT)已被证明在男性和女性中发挥多种功能,并在中枢神经系统(CNS)的情绪调节中发挥关键作用。OT在啮齿动物和人类的CNS中具有抗焦虑作用。然而,这种效应的分子机制尚不清楚。在这里,我们表明,OT诱导表达的G蛋白信号转导调节因子2(RGS2),焦虑的调节因子,在中央杏仁核(CeA)的雌性小鼠。OT浴应用增加RGS2水平在切片的杏仁核的处女小鼠。哺乳期小鼠CeA中的RGS2水平高于未交配小鼠。相比之下,当幼崽被移除时,已经分娩的小鼠中的RGS2水平没有增加。急性束缚应激4h诱导CeA内RGS2表达,局部给予OT受体拮抗剂抑制这种表达。行为实验表明,短暂的约束压力有抗焦虑作用的野生型女性,和RGS2水平的CeA与抗焦虑行为。相比之下,在OT受体缺陷小鼠中,束缚应激既没有增加CeA中的RGS2水平,也没有抗焦虑作用。这些结果表明,OT通过诱导CNS中的RGS2表达而显示出抗焦虑作用。
The neuropeptide oxytocin (OT) has been shown to exert multiple functions in both males and females, and to play a key role in the regulation of emotionality in the central nervous system (CNS). OT has an anxiolytic effect in the CNS of rodents and humans. However, the molecular mechanisms of this effect are unclear. Here we show that OT induced the expression of regulator of G-protein signaling 2 (RGS2), a regulatory factor for anxiety, in the central amygdala (CeA) of female mice. Bath application of OT increased RGS2 levels in slices of the amygdala of virgin mice. RGS2 levels in the CeA were higher in lactating mice than in virgin mice. In contrast, RGS2 levels in mice that had given birth did not increase when the pups were removed. Acute restraint stress for 4h induced RGS2 expression within the CeA, and local administration of an OT receptor antagonist inhibited this expression. Behavioral experiments revealed that transient restraint stress had an anxiolytic effect in wild-type females, and RGS2 levels in the CeA correlated with the anxiolytic behavior. By contrast, in the OT receptor-deficient mice, restraint stress neither increased RGS2 levels in the CeA nor had an anxiolytic effect. These results suggest that OT displays an anxiolytic effect through the induction of RGS2 expression in the CNS.
3 – 杏仁核:在自主神经和神经内分泌应激反应中的作用
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