Sex‐role reversal is reflected in the brain of African black coucals (Centropus grillii)
Sex‐role reversal is reflected in the brain of African black coucals (Centropus grillii)
复制标题
性别角色逆转反映在非洲黑人（Centropus Grillii）的大脑中
作者：
C. Voigt;W. Goymann
在大多数鸟类物种中，雄性在建立和保卫繁殖领土或保卫配偶时会竞争获得雌性，并且循环雄激素水平升高。特鲁姆参与调节男性的领土侵略和性展示。在少数鸟类中，传统的性别角色被颠倒，雌性具有高度的攻击性，并争夺雄性。这些物种是研究雌性攻击行为的激素调节的极好模型。性别角色逆转物种的血浆性类固醇浓度遵循具有“传统”性别角色的鸟类的模式。调节性角色逆转鸟类内分泌和交配行为相互作用的神经机制目前尚不清楚。我们研究了雄激素受体、雌激素受体α和芳香化酶mRNA表达的性别差异，这些基因在黑鸦科参与生殖和攻击行为的两个脑核团中，即带核和终纹床核。在床核有没有性别差异的受体或芳香化酶的表达。然而，在带核中，我们首次发现，女性雄激素受体的mRNA表达高于男性。这些结果表明，在女性中的激动和求偶行为的表达不依赖于升高的血液激素水平，但可以通过增加类固醇激素的敏感性在特定的目标区域在大脑中进行调节。因此，女性和男性的攻击性可能确实受到相同激素的调节，但在神经内分泌级联的不同水平上进行调节。© 2007 Wiley Periodicals，Inc.开发神经生物学，2007年
In most bird species males compete over access to females and have elevated circulating androgen levels when they establish and defend a breeding territory or guard a mate. Testosterone is involved in the regulation of territorial aggression and sexual display in males. In few bird species the traditional sex‐roles are reversed and females are highly aggressive and compete over access to males. Such species represent excellent models to study the hormonal modulation of aggressive behavior in females. Plasma sex steroid concentrations in sex‐role reversed species follow the patterns of birds with “traditional” sex‐roles. The neural mechanisms modulating endocrine secretion and hormone–behavior interactions in sex‐role reversed birds are currently unknown. We investigated the sex differences in the mRNA expression of androgen receptors, estrogen receptor α, and aromatase in two brain nuclei involved in reproductive and aggressive behavior in the black coucal, the nucleus taeniae and the bed nucleus of the stria terminalis. In the bed nucleus there were no sex differences in the receptor or aromatase expression. In the nucleus taeniae, however, we show for the first time, that females have a higher mRNA expression of androgen receptors than males. These results suggest that the expression of agonistic and courtship behavior in females does not depend on elevated blood hormone levels, but may be regulated via increased steroid hormone sensitivity in particular target areas in the brain. Hence, aggression in females and males may indeed be modulated by the same hormones, but regulated at different levels of the neuroendocrine cascade. © 2007 Wiley Periodicals, Inc. Develop Neurobiol, 2007
分析性别角色逆转物种 Wilsons phalarope 大脑中催乳素结合活性和下丘脑 GnRH 浓度的性别和繁殖阶段差异。
影响因子：
2.7
作者：
Buntin,JD;Halawani,ME;Ottinger,MA;Fan,Y;Fivizzani,AJ
通讯作者：
Fivizzani,AJ
雌雄二态的红鹪鹩和白鹪鹩的鸣叫核中类固醇的积累。
DOI：
10.1002/(sici)1097-4695(199610)31:2
发表时间：
1996
期刊：
Journal of neurobiology
影响因子：
--
作者：
Brenowitz,EA;Arnold,AP;Loesche,P
通讯作者：
Loesche,P
DOI：
10.1002/(sici)1097-4695(19990905)40:3
发表时间：
1999-09-05
期刊：
JOURNAL OF NEUROBIOLOGY
影响因子：
--
作者：
Foidart, A;Lakaye, B;Balthazart, J
通讯作者：
Balthazart, J