聚乙烯纳米颗粒诱导TM4塞尔托利细胞中的转录抑制
Xin Huang1, Kexuan He2, Ying Jiang1
1School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, China.
Journal of applied toxicology : JAT
|September 10, 2025
概括
聚乙烯纳米颗粒 (PS-NPs) 通过降低Tet3的调节,破坏男性生殖细胞,影响DNA甲基化和基因表达. 这种表观遗传干扰会影响精子生成的微环境.
科学领域:
- 环境毒理学环境毒理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 生殖生物学 生殖生物学
背景情况:
- 聚乙烯纳米颗粒 (PS-NP) 是常见的环境污染物.
- PS-NP可以积聚在生物组织中,造成潜在的健康风险.
- 塞尔托利细胞 (TM4) 对于维持男性精子生成微环境至关重要.
研究的目的:
- 研究PS-NP对TM4细胞的影响.
- 评估PS-NP诱导的细胞毒性,内化和聚合.
- 确定暴露于PS-NPs的TM4细胞中的转录和表观遗传变化.
主要方法:
- 在24-72小时内,TM4细胞暴露于不同度的PS-NP (0-100μg/mL).
- 测量了细胞活力,膜完整性和ROS水平.
- 使用了传输电子显微镜 (TEM),转录组测序和qRT-PCR.
主要成果:
- PS-NP被内部化并聚合在TM4细胞中,增加ROS水平并损害膜完整性.
- 转录组分析显示382个差异表达基因 (DEGs),其中320个是下调调的.
- 暴露于PS-NP显著降低了Tet3表达,这与异常的DNA甲基化模式和转录抑制有关.
结论:
- PS-NP诱导TM4细胞的表观遗传变化,主要是通过Tet3下调和破坏DNA甲基化.
- 这些表观遗传变化表明可能对男性生殖微环境和精子生成产生不良影响.
- 该研究强调,需要了解环境污染物的表观遗传影响,如PS-NPs.
相关概念视频
Somatic to iPS Cell Reprogramming
2.6K
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
2.6K
Eukaryotic Transcription Inhibitors
10.9K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
10.9K


