Efferent projections of prokineticin 2 expressing neurons in the mouse suprachiasmatic nucleus.

Efferent projections of prokineticin 2 expressing neurons in the mouse suprachiasmatic nucleus.
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DOI:
10.1371/journal.pone.0007151
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发表时间:
2009-09-28
期刊:
影响因子:
3.7
通讯作者:
Zhou QY
Zhou QY
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang C;Truong KK;Zhou QY

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下丘脑视交叉上核(SCN)是哺乳动物的主要生物钟。为了起到起搏器的作用,SCN的内在定时信号必须被传输到不同的大脑区域。前动力蛋白2(PK2)是SCN的候选输出分子之一。在这项研究中,我们研究了PK2表达神经元的传出投射在SCN通过转基因报告的方法。使用细菌人工染色体(BAC)转基因小鼠系,其中增强的绿色荧光蛋白(EGFP)报告基因的表达是由PK2启动子驱动,我们能够获得一个传出投射地图从EGFP表达的神经元在SCN。我们的数据显示,在SCN的EGFP表达的神经元,因此代表一些PK2表达的神经元,投射到许多已知的SCN的目标领域,包括腹侧隔,内侧视前区,室旁带,室旁核,背内侧下丘脑核,外侧下丘脑区和室旁丘脑核。PK2表达神经元的传出投射支持PK2作为SCN的输出分子的作用。
The suprachiasmatic nucleus (SCN) in the hypothalamus is the predominant circadian clock in mammals. To function as a pacemaker, the intrinsic timing signal from the SCN must be transmitted to different brain regions. Prokineticin 2 (PK2) is one of the candidate output molecules from the SCN. In this study, we investigated the efferent projections of PK2-expressing neurons in the SCN through a transgenic reporter approach. Using a bacterial artificial chromosome (BAC) transgenic mouse line, in which the enhanced green fluorescence protein (EGFP) reporter gene expression was driven by the PK2 promoter, we were able to obtain an efferent projections map from the EGFP-expressing neurons in the SCN. Our data revealed that EGFP-expressing neurons in the SCN, hence representing some of the PK2-expressing neurons, projected to many known SCN target areas, including the ventral lateral septum, medial preoptic area, subparaventricular zone, paraventricular nucleus, dorsomedial hypothalamic nucleus, lateral hypothalamic area and paraventricular thalamic nucleus. The efferent projections of PK2-expressing neurons supported the role of PK2 as an output molecule of the SCN.
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