激活的休眠干细胞在化学辐射疗法诱导的不孕症中恢复精子生成
Shu-Hua Yang1, Yi-Zhe Zeng1, Xi-Zheng Jia1
1MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
Cell reports
|August 3, 2024
概括
化学辐射疗法可能导致男性不孕. 一个特定的休眠细胞群体,表达Setd4的精子干细胞 (SSCs),在治疗中幸存下来并重新开始精子生产,突出了它们在生育恢复中的关键作用.
科学领域:
- 生殖生物学 生殖生物学
- 发展生物学 发展生物学
- 癌症研究 癌症研究
背景情况:
- 化学放射治疗是男性不孕症的已知原因之一.
- 治疗后负责精子生成恢复的特定干细胞尚不清楚.
- 识别这些细胞及其机制对于生育保存策略至关重要.
研究的目的:
- 为了识别能够在化疗和放射治疗中生存的特定精子干细胞 (SSCs).
- 阐明这些SSC抵御毒性并启动精子生成恢复的机制.
- 确定表达Setd4的SSC在丸发育和生育能力恢复中的作用.
主要方法:
- 在小鼠的精卵管中识别和描述表达Setd4的SSCs.
- 在高剂量化疗或放射治疗后评估SSC存活率和功能.
- 对Setd4+SSC进行遗传删除,以评估它们对于精子生成恢复的必要性.
- 参与SSC激活的分子通路的分析,包括染色质重塑和基因表达 (Notch1,Aurora,p21,p53).
主要成果:
- 鉴定了一种独特的休眠,胎儿衍生的Setd4表达的SSC群体.
- 这些Setd4+SSCs能够在高剂量化疗和放射治疗中存活下来,并且对于精子生成恢复至关重要.
- 删除Setd4+ SSCs会取消治疗后的生育恢复.
- SSC激活涉及染色质重塑,导致Notch1/Aurora激活和p21/p53沉默.
结论:
- 表达Setd4的SSC是负责启动丸发育和恢复化学放射治疗诱导不孕症后的精子生成的关键细胞群.
- 这些细胞是旨在保护男性生育能力的治疗干预的关键目标.
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