相关实验视频
Updated: Jun 11, 2025

10:43
Dissection of Larval Zebrafish Gonadal Tissue
Published on: April 26, 2017
10.2K
在尼罗河鱼中,dmrt1是导致雄激素诱导的男性化的原因
Shengfei Dai1, Mei Li1, Jie Yuan1
1Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Chongqing Municipality for Aquatic Economic Animal Resources Conservation and Germplasm Creation, School of Life Sciences, Southwest University, Chongqing 400715, China.
Genes
|September 28, 2024
概括
17α-甲基 (MT) 通过抑制类固醇合成和激活dmrt1基因,使鱼类变得男性化. 这项研究揭示了dmrt1对尼罗河鱼中MT诱导的男性化至关重要,澄清了分子机制.
科学领域:
- 发展生物学 发展生物学
- 内分泌学 在内分泌学.
- 水产养殖是水产养殖的一种方式.
背景情况:
- 17α-甲基 (MT) 对于在水产养殖中生产全男性鱼类至关重要.
- 驱动MT诱导的男性化的精确分子机制尚未完全理解.
- 研究性逆变异体中的基因功能,为性别决定途径提供了洞察力.
研究的目的:
- 确定负责17α-甲基 (MT) 诱导的男性化的主要基因.
- 阐明尼罗河鱼 (Oreochromis niloticus) 中MT作用的分子机制.
- 分析amhy,dmrt1和gsdf基因在MT诱导的性别逆转中的作用.
主要方法:
- 用MT对来自amhy,dmrt1和gsdf突变系的尼罗河鱼幼进行治疗.
- 淋巴细胞转录组分析以比较基因表达模式.
- 路西法雷斯记者测试评估MT对cyp19a1a促进者活动的影响.
- 对生殖细胞增殖和基因表达变化的分析.
主要成果:
- MT治疗成功地使amhy和gsdf突变体变得男性化,但dmrt1突变体没有.
- MT抑制了早期的类固醇酶表达,并抑制了cyp19a1a促进剂的活性.
- 在野生类型和其他突变系中,dmrt1表达是由MT诱导的,而在amhy和gsdf突变种中,胚胎细胞增殖被抑制,但dmrt1突变种中没有.
结论:
- 在尼罗河鱼中,dmrt1对于17α-甲基 (MT) 诱导的男性化是不可或缺的.
- MT通过抑制早期的类固醇生成并随后激活dmrt1来促进丸发育而起作用.
- 这项研究澄清了MT作用的分子途径,这对于水产养殖应用至关重要.
相关概念视频
The Y Chromosome Determines Maleness
6.5K
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....
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....
6.5K
The Ratio of X Chromosome to Autosomes
8.4K
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...
8.4K

