降低的miR-486-5p通过促进SMAD2表达,参与脂聚糖诱导的HTR-8/SVneo细胞功能障碍
概括
减少miR-486-5p的表达与早期妊娠丧失 (EPL) 相关,因为它会损害外性热囊细胞 (EVT) 侵袭并增加TNFα. 在LPS诱导的EVT功能障碍和EPL病变发生过程中,miR-486-5p/Smad2通路至关重要.
科学领域:
- 生殖生物学 生殖生物学
- 分子遗传学 分子遗传学
- 病理学 病理学 病理学
背景情况:
- 与胎盘相关的病理,如早孕流产 (EPL),涉及到不足的外性热囊细胞 (EVT) 侵袭.
- 下调的miR-486-5p表达与减少EVT入侵和EPL有关,但潜在的分子机制尚不清楚.
研究的目的:
- 调查miR-486-5p/Smad2通路在脂聚糖 (LPS) 诱导的EVT功能障碍中的作用.
- 阐明miR-486-5p在EVT入侵和早期怀孕流产中的分子机制.
主要方法:
- 使用LPS诱导的EPL小鼠模型和一个永生的人类EVT细胞系 (HTR-8/SVneo).
- 评估了EVT入侵,生存能力和TNFα产生.
- 分析了miR-486-5p和Smad2.2的基因表达.
- 研究了人类的决定性单细胞RNA测序和转录组数据集.
主要成果:
- LPS抑制了EVT的入侵和活力,降低了miR-486-5p,增加了Smad2的表达.
- miR-486-5p模仿了减弱的LPS诱导的Smad2上调.
- 降低Smad2的调控恢复了EVT的入侵和可行性.
- LPS增加了TNFα的产生,这是通过Smad2或miR-486-5p调制逆转的.
- 在人类复发性流产患者中观察到SMAD2表达的增加.
结论:
- 减少miR-486-5p的表达通过向SMAD2,抑制EVT入侵,并促进TNFα的产生,有助于EPL.
- miR-486-5p/Smad2通路是LPS诱导的EVT功能障碍和EPL病变的关键参与者.
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