The androgen receptor governs the execution, but not programming, of male sexual and territorial behaviors.

The androgen receptor governs the execution, but not programming, of male sexual and territorial behaviors.
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DOI:
10.1016/j.neuron.2010.03.024
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发表时间:
2010-04-29
期刊:
影响因子:
16.2
通讯作者:
Shah, Nirao M.
Shah, Nirao M.
中科院分区:
医学1区
文献类型:
--
作者:
Juntti, Scott A.;Tollkuhn, Jessica;Wu, Melody V.;Fraser, Eleanor J.;Soderborg, Taylor;Tan, Stella;Honda, Shin-ichiro;Harada, Nobuhiro;Shah, Nirao M.

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睾酮和雌激素对于脊椎动物的雄性行为至关重要。这两条信号通路如何相互作用来控制大脑的男性化和行为仍有待确定。循环中的睾酮会激活雄激素受体(AR),同时也是大脑中雌激素的来源。我们使用遗传策略专门删除小鼠神经系统中的 AR。这种方法使我们能够确定 AR 在男性性二态性行为中的功能,同时将循环睾酮水平维持在正常范围内。我们发现 AR 突变雄性表现出男性的性行为和领地展示,但它们在这些行为的特定组成部分上有显着的缺陷。考虑到 AR 在发育中大脑中的表达出人意料地有限,我们的研究结果表明,睾酮作为雌激素的前体,使大脑和行为男性化,并通过 AR 发出信号来控制男性行为表现的水平。
Testosterone and estrogen are essential for male behaviors in vertebrates. How these two signaling pathways interact to control masculinization of the brain and behavior remains to be established. Circulating testosterone activates the androgen receptor (AR) and also serves as the source of estrogen in the brain. We have used a genetic strategy to delete AR specifically in the mouse nervous system. This approach permits us to determine the function of AR in sexually dimorphic behaviors in males while maintaining circulating testosterone levels within the normal range. We find that AR mutant males exhibit masculine sexual and territorial displays, but they have striking deficits in specific components of these behaviors. Taken together with the surprisingly limited expression of AR in the developing brain, our findings indicate that testosterone acts as a precursor to estrogen to masculinize the brain and behavior, and signals via AR to control the levels of male behavioral displays.
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