母体缺铁会导致小鼠胚胎的性别逆转
Naoki Okashita1, Ryo Maeda1, Shunsuke Kuroki1
1Laboratory of Epigenome Dynamics, Graduate School of Frontier Biosciences, Osaka University, Suita, Japan.
Nature
|June 4, 2025
概括
铁对于哺乳动物的男性性别决定至关重要. 缺铁会破坏Sry基因的基因脱甲基,导致生殖腺发育时发生男性对女性的性别逆转.
科学领域:
- 发育生物学
- 表观遗传学
- 哺乳动物繁殖
背景情况:
- 铁 (Fe2+) 对真核细胞功能至关重要,包括DNA和蛋白质脱甲基化.
- 在哺乳动物男性的性别确定过程中,对Sry基因的表观基因调节至关重要.
研究的目的:
- 研究铁代谢,基因素脱甲基和哺乳动物的性别决定之间的联系.
- 阐明铁在调节Sry基因表达和性腺发育中的作用.
主要方法:
- 在发育中的小鼠生殖腺中分析Fe2+产生途径.
- 在培养的XY生殖腺中化铁,以评估对Sry表达和脱甲基化的影响.
- 在小鼠体内包括条件删除Tfrc基因和药物抑制铁的研究.
- 在怀孕小鼠中长期的低铁食,与遗传变异相结合.
主要成果:
- 在小鼠胚胎的关键性性别决定期内,Fe2+产生途径被激活.
- 在XY性腺中,铁化减少了KDM3A介导的Sry的H3K9脱甲基化,抑制了Sry的表达,并诱导了卵巢标记物.
- 在一定比例的后代中,有条件的Tfrc删除或铁抑制导致雄性转为雌性.
- 母亲的低铁饮食与Kdm3a变体相结合导致Sry抑制和部分后代的性别逆转.
结论:
- 铁代谢在哺乳动物男性的性别决定中起着关键作用.
- 铁的可用性对于通过基因素脱甲基的适当Sry基因调节至关重要.
- 孕产妇饮食中的铁摄入量会影响胎儿的性腺发育和性别决定.
更多相关视频
05:36Author Spotlight: Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination
Published on: July 7, 2023
8.6K
03:19Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
Published on: June 28, 2024
506
相关概念视频
X-Inactivation
39.0K
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
39.0K
Meiosis vs. Mitosis
39.6K
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
39.6K
