相关实验视频
Updated: Jun 19, 2026

10:44
Sex Stratified Neuronal Cultures to Study Ischemic Cell Death Pathways
Published on: December 9, 2013
雌激素使神经通路和性别特异性行为变得男性化
Melody V Wu1, Devanand S Manoli, Eleanor J Fraser
1Program in Neuroscience, University of California-San Francisco, San Francisco, CA 94158, USA.
Cell
|October 7, 2009
概括
测试激素 测试激素是什么
科学领域:
- 神经内分泌学神经内分泌学
- 行为神经科学 行为神经科学
- 发育神经科学的发展神经科学.
背景情况:
- 性激素,包括和雌激素,对于大脑发育和性别特异性行为至关重要.
- 在男性行为中丸激素和雌激素通路之间的相互作用尚未完全理解.
- 通过雄激素受体 (AR) 起作用,并在大脑中通过芳酶转化为雌激素.
研究的目的:
- 研究芳香酶在性差异化和激活控制男性行为的神经回路中的作用.
- 为了阐明和雌激素在大脑中的信号交叉.
- 确定芳酶独立和依赖途径在男性化中的贡献.
主要方法:
- 在芳香酶表达神经元中检查了性二态.
- 研究了和雌激素对女性芳香酶表达神经元的影响.
- 在AR突变男性和新生儿暴露于雌激素的女性中评估男性特异性行为 (侵略性,尿液标记).
- 利用遗传模型 (AR突变) 和荷尔蒙操纵.
主要成果:
- 在芳香酶表达神经元的数量和投影中表现出显著的性二态.
- 表明这些神经元的男性化独立于雄激素受体 (AR).
- 发现或雌激素可以诱导女性这些神经元的男性化.
- 提供了证据,证明芳酶对于激活男性侵略和尿液标记至关重要,即使没有AR信号.
结论:
- 的向雌激素的芳香化在男性领土行为背后的神经回路的发展和激活中起着至关重要的作用.
- 由芳酶介导的雌激素信号传递对于特定神经元群体的性差异化至关重要.
- 雄激素受体 (AR) 不需要用于芳香酶表达神经元的男性化,突出了激素影响的替代途径.
相关概念视频
Socioemotional Experience and Gender Development
Social-emotional experiences and cultural influences play significant roles in shaping gender development. During middle childhood, from ages 6 to 11, peer groups become dominant in reinforcing gender norms. Children in this age group often align with same-gender peer groups, which actively encourage behaviors that conform to traditional gender roles. For instance, boys may be discouraged from engaging in activities perceived as feminine, reinforcing culturally dictated norms about masculinity...
The Y Chromosome Determines Maleness
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Signs of Puberty
Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
Development of the Sexual Organs in the Embryo and Fetus
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Major Hormones and Their Functions
Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
X-linked Traits
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
