Medial preoptic area in mice is capable of mediating sexually dimorphic behaviors regardless of gender.

Medial preoptic area in mice is capable of mediating sexually dimorphic behaviors regardless of gender.
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小鼠内侧视前区能够介导性别二态性行为,无论性别如何

DOI:
10.1038/s41467-017-02648-0
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发表时间:
2018-01-18
影响因子:
16.6
通讯作者:
Xu XH
Xu XH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wei YC;Wang SR;Jiao ZL;Zhang W;Lin JK;Li XY;Li SS;Zhang X;Xu XH

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内侧视前区(mPOA)在几乎所有研究过的物种中,包括人类,在雄性和雌性之间都是不同的。在这里,使用纤维光度法记录自由行为小鼠的Ca2+瞬态,我们发现在雄性典型的攀爬和雌性典型的幼崽检索的两性二态显示之前,mPOA的活动增加并与之相关。引人注目的是,mPOA的光遗传刺激在雄性和雌性中都引起了相似的上马和幼崽取回的表现。此外,通过记录、消融、光基因激活和抑制,我们发现表达雌激素受体α (Esr1)的mPOA神经元对这些行为的性别偏见表现至关重要。总之,这些结果强调了在雄性和雌性小鼠中可以调节性别特异性行为的大脑共享布局,并为未来解码控制两性二态行为的神经机制提供了重要的功能框架。哺乳动物大脑的内侧视前区(mPOA)是两性二态的,但其在调节性别特异性行为中的确切功能尚不清楚。在这里,Xu和他的同事们表明,光遗传学操作雄性小鼠的mPOA会诱导雌性小鼠的刻板行为,反之亦然。
The medial preoptic area (mPOA) differs between males and females in nearly all species examined to date, including humans. Here, using fiber photometry recordings of Ca2+ transients in freely behaving mice, we show ramping activities in the mPOA that precede and correlate with sexually dimorphic display of male-typical mounting and female-typical pup retrieval. Strikingly, optogenetic stimulation of the mPOA elicits similar display of mounting and pup retrieval in both males and females. Furthermore, by means of recording, ablation, optogenetic activation, and inhibition, we show mPOA neurons expressing estrogen receptor alpha (Esr1) are essential for the sexually biased display of these behaviors. Together, these results underscore the shared layout of the brain that can mediate sex-specific behaviors in both male and female mice and provide an important functional frame to decode neural mechanisms governing sexually dimorphic behaviors in the future. The medial preoptic area (mPOA) in a mammalian brain is sexually dimorphic, and yet its exact function in mediating gender-specific behavior remains unclear. Here, Xu and colleagues show that optogenetic manipulation of the mPOA in male mice induce female-stereotyped behaviors and vice versa.
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