在雄性小鼠中,与年龄相关的精子生成活性下降伴随着内皮细胞衰老
Manabu Ozawa1, Hideto Mori1, Tsutomu Endo2
1Laboratory of Reproductive Systems Biology, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.
iScience
|December 11, 2023
概括
男性的生育能力随着年龄的增长而下降,原因是精子的减少. 衰老导致丸内皮细胞 (ECs) 变老,损害它们对精子生产的支持. 移除这些衰老的EC可以恢复生育能力.
科学领域:
- 生殖生物学 生殖生物学
- 老年学是一门学科.
- 细胞生物学 细胞生物学
背景情况:
- 男性的生育能力自然会随着年龄的增长而下降.
- 精子产量下降是与年龄相关的男性不孕症的一个关键因素.
- 在老年男性中丸功能改变背后的精确机制仍然不完全理解.
研究的目的:
- 为了研究丸体细胞中与年龄相关的变化.
- 确定这些变化对精子生成活性的影响.
- 阐明内皮细胞 (ECs) 在与年龄相关的生育能力下降中的作用.
主要方法:
- 在年轻和老年小鼠中对精子数和增殖的比较分析.
- 在丸组织中识别衰老细胞,使用与衰老相关的β-galactosidase染色.
- 来自不同年龄小鼠的丸ECs的转录组分析.
- 评估ECs在体外对精子的增殖的支持能力.
- 对老年EC和其支持性功能的老化治疗效应的评估.
主要成果:
- 在老年小鼠中观察到精子数和增殖的显著减少.
- 与衰老相关的β-galactosidase阳性细胞在老龄化的丸EC中被发现,但不是在生殖细胞中.
- 转录组数据证实了老年小鼠的ECs中的衰老.
- 老年ECs支持精子生殖增殖的能力显著下降.
- 老化治疗成功地从老年EC中去除了衰老细胞,使其支持功能恢复到年轻EC中所见的水平.
结论:
- 丸中老化的内皮细胞 (ECs) 的积累是与年龄相关的精子生成衰退的潜在贡献者.
- 衰老的EC表现出对精子细胞增殖的支持减少.
- 针对衰老的EC可以提供一种治疗策略,以减轻与年龄相关的男性不孕症.
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