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Updated: Jun 5, 2025

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在Znrf3缺乏的小鼠中,单细胞分辨率的阴道性别逆转
Raissa G G Kay1, Richard Reeves1, Pam Siggers1
1MRC Mammalian Genetics Unit, MRC Harwell Institute, Didcot, Oxfordshire OX11 0RD, UK.
概括
在XY小鼠中,ZNRF3的丧失导致淋巴腺性逆转,导致卵巢组织发育. 这项研究揭示了破坏的塞尔托利和花质细胞分化,挑战了二元性别确定模型.
科学领域:
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
背景情况:
- WNT信号通路在胚胎发育中起着至关重要的作用,包括性别决定.
- ZNRF3 作为E3 泛素酶和 WNT 信号的负调节剂.
- 破坏WNT信号传递可以导致异常的淋巴腺发育和性别逆转.
研究的目的:
- 通过使用小鼠模型,研究ZNRF3在淋巴腺性别确定中的作用.
- 分析缺乏功能ZNRF3.3的XY生殖腺中的细胞和转录组变化.
- 了解ZNRF3缺陷小鼠发生性逆转的基因机制.
主要方法:
- 在性别确定期间,XY Znrf3 缺陷的小鼠淋巴体的单细胞RNA 测序 (scRNA-seq).
- 细胞轨迹和转录基因数据的计算分析.
- 开发基于机器学习的得分,以量化塞尔托利和颗粒素细胞的身份.
主要成果:
- 缺少XY Znrf3的淋巴体表现出与卵巢组织的变性性反转.
- 塞尔托利前细胞未能承担塞尔托利细胞命运和异常的XY粒状细胞发育.
- 在支持细胞系中显著的转录组和细胞异质性,细胞共同表达pro-Sertoli和pro-granulosa标记物.
- 在ZNRF3缺乏支持细胞前体细胞中丸细胞命运获取的破坏.
结论:
- 丧失ZNRF3会通过破坏支持细胞分化,导致淋巴体的性别逆转.
- ZNRF3对于正确地致力于塞尔托利细胞命运和防止XY生殖腺中粒状细胞的发展至关重要.
- 这些发现挑战了淋巴体性别决定的简单二元模型,突出了细胞可塑性和异质性.
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