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Oogenesis02:07

Oogenesis

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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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Hormonal Control of the Ovarian Cycle01:30

Hormonal Control of the Ovarian Cycle

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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...
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Updated: Feb 28, 2026

Studying Mitochondrial Structure and Function in Drosophila Ovaries
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Studying Mitochondrial Structure and Function in Drosophila Ovaries

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暴露于DEHP会影响卵巢卵泡发育期间的线粒体功能.

Shu-Jie Yang1, Xiao-Kang Lu1, Li-Shu Li1

  • 1College of Animal Science and Technology & College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, Zhejiang, China.

Environmental toxicology
|February 27, 2026
PubMed
概括

暴露于二二甲基甲酸盐 (DEHP) 会通过破坏卵巢发育和功能来损害女性的生育能力. 这项研究揭示了DEHP通过特定的分子通路损害了线粒体动力学和DNA完整性.

关键词:
在DEHP中,DEHP是DEHP.线粒体中的线粒体.线粒细胞衰变 (mitophagy) 是一种神经衰变的过程.卵巢 卵巢是一个卵巢.氧化应激是一种氧化应激.

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Visualizing the Effects of Oxidative Damage on Drosophila Egg Chambers using Live Imaging
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In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
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相关实验视频

Last Updated: Feb 28, 2026

Studying Mitochondrial Structure and Function in Drosophila Ovaries
09:53

Studying Mitochondrial Structure and Function in Drosophila Ovaries

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Visualizing the Effects of Oxidative Damage on Drosophila Egg Chambers using Live Imaging
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Visualizing the Effects of Oxidative Damage on Drosophila Egg Chambers using Live Imaging

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In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
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科学领域:

  • 生殖毒理学 生殖毒理学
  • 环境健康 环境健康
  • 分子生物学分子生物学

背景情况:

  • 乙二甲基甲酸 (DEHP) 是一种广泛存在的环境污染物,与女性生殖问题有关.
  • 以前的研究表明,暴露于DEHP会使卵巢毛囊枯竭,并破坏激素的产生.
  • 在DEHP对卵巢功能影响的基础上,精确的分子机制在很大程度上是未知的.

研究的目的:

  • 研究DEHP对雌性小鼠卵巢发育和功能的体内影响.
  • 为了阐明涉及DEHP诱导的卵巢损伤的分子途径.

主要方法:

  • 一个体内小鼠模型在28天内暴露于200mg/kg的DEHP中.
  • 评估了卵巢发育,卵泡数,线粒体动态,氧化应激和DNA损伤.
  • 分析了包括Sirt3/Sod2和Akt/mTOR在内的关键信号通路.

主要成果:

  • 暴露于DEHP抑制了卵巢发育和卵泡成熟,减少了初级和腹卵泡的数量.
  • 线粒体动力学受到干扰,导致线粒体和自.
  • 氧化应激,异常的线粒体能量代谢,DNA损伤和亡是由DEHP诱导的.
  • 观察到Sirt3/Sod2和Akt/mTOR信号通路的抑制.

结论:

  • 暴露于DEHP显著损害女性卵巢功能和生殖能力.
  • 通过抑制Sirt3/Sod2和Akt/mTOR信号通路来介导有害影响.
  • 这项研究为女性生殖系统中DEHP毒性的分子机制提供了关键的见解.