海马Cdk5在雄性和雌性小鼠中受到不同的压力范式的调节
bioRxiv : the preprint server for biology
|January 9, 2026
概括
在雄性和雌性小鼠中,压力和社会隔离对焦虑的影响不同. 研究人员发现,与隔离相结合的长时间压力影响了海马Cdk5 (环素依赖激酶5) 表达,特别是在男性中,而单独的社会隔离则改变了女性的表达.
科学领域:
- 神经科学是一个神经科学.
- 压力和焦虑研究 压力和焦虑研究
- 生物学中的性别差异
背景情况:
- 焦虑和情绪障碍在COVID-19后增加,女性受到的影响不成比例.
- 女人的社会隔离和压力的相互作用还没有得到充分的研究.
- 循环素依赖性激酶5 (Cdk5) 在压力下显示性别特异性调节,但研究偏向于男性.
研究的目的:
- 为了研究小鼠海马Cdk5mRNA和蛋白质水平的性别差异.
- 检查克制压力和社会隔离对Cdk5表达和行为的影响.
- 了解心理和环境压力因素对Cdk5监管的综合影响.
主要方法:
- 小鼠接受了短时间 (10分钟) 和长时间 (1小时) 的克制压力,有或没有社会隔离.
- 测量了海马体Cdk5mRNA和蛋白质水平.
- 评估了类似焦虑的和探索性的行为.
主要成果:
- 短暂的克制压力在两性中都引起了焦虑,但没有改变Cdk5.5.
- 长时间的克制压力与社会隔离相结合,导致雄性特异性增加海马体Cdk5mRNA和核蛋白转位.
- 仅仅社会隔离就增加了女性的Cdk5蛋白.
- 重复的克制压力增强了两性探索行为,这表明压力反应发生了变化.
- 女性在各种条件下表现出较少的不动性和更多的探索性.
结论:
- 这项研究揭示了由综合性压力因素对海马体Cdk5的性别特异调节.
- 这些发现突出了男性和女性对压力和孤立的独特分子反应.
- 这项研究为与压力相关的疾病中性别差异的神经生物学基础提供了关键的见解.
相关概念视频
The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Dosage Compensation
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...
Positive Regulator Molecules
Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
Inhibition of Cdk Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
M-Cdk Drives Transition Into Mitosis
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
M-Cdk Drives Transition Into Mitosis
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...


