在羊群中,LPS通过TLR4/ERK通路调节子宫内膜免疫恒温和受体
Jinzi Wei1, Xing Fan1, Xiaorui Zang1
1College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.
Animals : an open access journal from MDPI
|June 26, 2025
概括
雌羊的细菌感染通过破坏子宫免疫环境和降低子宫内膜受容性来损害胚胎植入. 这项研究表明,LPS诱导的炎症通过TLR4/ERK通路破坏了关键的植入因子,提供了潜在的治疗点.
科学领域:
- 生殖免疫学 生殖免疫学
- 动物科学动物科学
- 分子生物学分子生物学
背景情况:
- 绵羊子宫的细菌感染通过阻碍胚胎植入而造成重大经济损失.
- 子宫内膜受容性和免疫微环境对于反动物成功怀孕至关重要.
研究的目的:
- 调查脂聚糖 (LPS) 输液在关键植入期期间对母羊的子宫免疫微环境和子宫内膜受容性的影响.
- 阐明TLR4/ERK途径在LPS诱导的胚胎植入障碍中的作用.
主要方法:
- 用RT-qPCR,西斑和免疫光来分析子宫内膜组织中的细胞因子和基因表达.
- 羊子宫内膜上皮细胞 (SEECs) 用于验证使用TLR4和ERK通路抑制剂的发现.
- 评估了PTE治疗对LPS诱导变化的影响.
主要成果:
- 输入LPS显著增加了Th1细胞因子 (TNF-α,IL-1β,IL-8,IL-6) 并减少了Th2细胞因子 (IL-4,IL-10).
- 关键植入因子 (ITGB3,ITGB5,VEGF,LIF) 的表达受到LPS的干扰.
- 在LPS后,TLR4蛋白和ERK酸化升高,表明TLR4/ERK通路激活.
- 抑制TLR4和ERK的药物,以及PTE治疗,减轻了LPS诱导的对子宫内膜受体和基因表达的负面影响.
结论:
- 由LPS诱导的子宫炎症通过使免疫平衡偏向Th1反应并破坏与植入相关的基因表达,损害了绵羊的子宫内膜受容性.
- TLR4/ERK信号通路与中介LPS诱导的子宫内膜受体损伤有关.
- 针对TLR4/ERK通路或使用PTE等化合物可能提供治疗策略,以改善受子宫感染影响的绵羊胚胎植入率.
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