父亲的年龄扩大了人类精子中的冷诱导的压力
Silvia Pérez Casasús1, Francesca Paola Luongo1, Alesandro Haxhiu1
1Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy.
Cells
|April 12, 2024
概括
先进的父亲年龄 (APA) 对精子质量产生负面影响,增加DNA碎片化,降低线粒体质量. 冷保存进一步加剧了老年男性的这些问题,影响了辅助生殖技术 (ART) 的精子生存能力.
科学领域:
- 生殖生物学 生殖生物学
- 安德罗学与人类学
- 精子研究研究精子.
背景情况:
- 全球男性生育率下降是多因素的,受环境,生活方式和衰老的影响.
- 辅助生殖技术 (ART) 使老年夫妇能够怀孕,从而增加了父亲的平均年龄.
- 先进的父亲年龄 (APA),通常定义为父亲年龄≥40,影响男性生殖生理学.
研究的目的:
- 调查晚年父亲年龄 (APA) 对精子质量和冷保存耐受性的影响.
- 为了比较年轻的 (非APA) 和年长的 (APA) 诺莫动物精子男性之间的精子参数.
- 评估父亲年龄和冷保存对精子DNA完整性,线粒体功能和体完整性的综合影响.
主要方法:
- 一项前性队列研究,涉及200名诺莫动物精子患者 (105名非APA ≤35岁;95名APA ≥42岁).
- 评估新鲜和冷保存的精子的DNA碎片化指数 (DFI),线粒体DNA复制数 (mtDNAcn),宏粒体完整性和铁酸蛋白水平.
- 非APA和APA组之间的比较分析,以及冷保存前与后的比较.
主要成果:
- 与非APA男性相比,APA男性在新鲜精子中表现出明显更高的DFI (21.7%对15.4%).
- 冷保存增加了APA精子 (26.7%) 的DFI,但不是非APA精子.
- 在新鲜和冷的精子中,APA与mtDNAcn的升高有关,这表明线粒体健康状况较差.
- 冰保存在两组中都降低了体完整性,在非APA男性中更为明显.
- 低温保存降低了年轻男性精子中的铁酸酸化.
结论:
- 先进的父亲年龄会影响精子质量,特别是DNA完整性和线粒体功能.
- 冷保存加剧了老年男性精子中的DNA碎片化.
- 父亲的年龄和冷保存对与ART成功相关的精子关键参数产生重大影响.
- 研究结果提供了关于受老化和ART中的冷保存影响的精子发育能力机制的见解.
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