GALNTL5与GalNAc结合,并被要求通过子宫管结和精子区域皮质结合的迁移
Taichi Noda1,2,3, Reika Uriu4, Daisuke Mashiko5
1Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, Japan. noda-t@kumamoto-u.ac.jp.
Nature communications
|September 17, 2025
概括
精子表面蛋白质GalNAc-T-like 5 (GALNTL5) 对于精子来说至关重要,以结合子宫管结 (UTJ) 和毛囊区 (ZP),确保男性生育能力. 它与N-乙银胺 (GalNAc) 的相互作用调解了这一必不可少的结合过程.
科学领域:
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 已知有超过20个基因对通过子宫管结 (UTJ) 进行精子迁移至关重要.
- 带有尿道迁移缺陷的精子也表现出对透视区 (ZP) 的结合受损.
- 两个主要的途径,ADAM3依赖性和ADAM3独立性,参与精子运输.
研究的目的:
- 研究一种精子表面蛋白 GalNAc-T-like 5 (GALNTL5) 在精子迁移和结合中的作用.
- 阐明精子-UTJ和精子-ZP相互作用背后的分子机制.
主要方法:
- 产生并分析Galntl5淘汰赛雄性小鼠以评估生育能力和精子功能.
- 在缺少Adam3或Lypd4.4的精子中检查了GALNTL5表达.
- 研究了GALNTL5与UTJ和ZP上的N-乙烯基 галактозамин (GalNAc) 的结合.
- 评估了GalNAc阻塞对精子结合的影响.
主要成果:
- 在Galntl5淘汰赛中,由于精子与UTJ和ZP的结合受损,男性表现出严重的不孕症.
- GALNTL5的表达依赖于Adam3和Lypd4,表明其集成到已知的两个途径中.
- GALNTL5直接与UTJ和ZP上存在的GalNAc结合.
- 阻止GalNAc显著降低了精子与UTJ和ZP的结合.
结论:
- GALNTL5是调解精子向UTJ和ZP迁移和结合的关键因素.
- 精子上的GALNTL5与UTJ/ZP上的GalNAc之间的相互作用对于成功受精至关重要.
- 这项研究揭示了精子-卵相互作用和男性生育能力的新型分子机制.
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