编程的介质性错误促进了丝虫Bombyx mori的二分性精子生产
L Benner1, M Richmond2, Y Xiang2
1Unit on Chromosome Dynamics, Division of Development Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, 20982, USA.
bioRxiv : the preprint server for biology
|August 19, 2025
概括
和蝶雄性产生两种精子类型,对受精至关重要. 这项研究揭示了关键的介质差异和分子途径,包括Sxl在易发生错误的阿皮尔内精子形成中的作用.
科学领域:
- 生殖生物学 生殖生物学
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 半月变异通常会产生平分体性雌同体,这对生育能力和后代健康至关重要.
- 类飞的雄性只能产生两种精子形态:受精的eupyrene和非受精的apyrene精子.
- 在Lepidoptera中产生双形精子的分子机制尚不清楚.
研究的目的:
- 阐明勒比类动物中eupyrene和apyrene精子生成之间的细胞学和分子差异.
- 为了研究Sex-lethal (Sxl) 在阿皮雷尼精子发育中的作用.
主要方法:
- 发育精子早期介质事件的细胞学分析.
- 丸的RNA测序产生尤皮林和阿皮林的精子.
- 野生类型和Sxl-knockout的阿皮伦丸的比较.
主要成果:
- 在第一阶段,apyrene精子细胞表现出失败的染色体凝聚,配对和端粒附着.
- 显著的转录变化发生在apyrene半半变化中,有半变性和细胞周期检查点基因的下调.
- 性致死性 (Sxl) 对于检查点无活化至关重要,它允许易发生错误的阿皮林半转化,而不是调节半转化基因表达.
结论:
- 在eupyrene和apyrene精子形成的介质途径中存在显著的差异.
- Sxl 作为细胞周期检查点的关键调节者,使得阿皮林精子生成的进展成为可能.
- 这些发现为莱比多的二形精子生产的分子基础提供了新的见解.
相关概念视频
Dosage Compensation
6.3K
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...
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...
6.3K
The Ratio of X Chromosome to Autosomes
8.8K
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...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.8K
Meiosis I
41.3K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
41.3K
Meiosis vs. Mitosis
58.2K
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...
58.2K


