热冲击抑制了牛子宫内膜上皮细胞的先天免疫反应
Arslan Tariq1, Masroor Sagheer1, Zachary K Seekford1,2
1Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, 32611, USA.
Reproduction & fertility
|February 10, 2026
概括
热应激会损害牛子宫内膜上皮细胞的先天免疫反应,降低它们对抗病原体的能力. 这种细胞免疫功能障碍可能会在热应激期间增加乳牛的子宫疾病发病率.
科学领域:
- 动物科学动物科学
- 免疫学 免疫学 免疫学
- 生殖生物学 生殖生物学
背景情况:
- 全球气温上升给畜牧业的健康和生产力带来了挑战.
- 奶牛容易受到热应激,这可能导致子宫疾病和降低生育能力.
- 热冲击对子宫内膜上皮细胞天生的免疫能力的影响尚不清楚.
研究的目的:
- 研究热冲击如何影响牛子宫内膜上皮细胞的先天免疫反应和线粒体呼吸.
- 评估急性和连续性热冲击对免疫基因表达和细胞功能的影响.
主要方法:
- 主要的牛子宫内膜上皮细胞是在热中性或热冲击条件下培养的.
- 用脂聚糖 (LPS) 刺激细胞,并暴露于单次或连续的热冲击.
- 分析了基因表达 (HSPA1A,TLR4,CXCL8,IL6,IL1B),细胞活力 (MTT试验) 和线粒体呼吸.
主要成果:
- 热冲击没有影响细胞活力或整体线粒体呼吸.
- 急性热冲击诱导HSPA1A表达,但抑制了LPS刺激的CXCL8和IL6表达.
- 热像受体4 (TLR4) 的表达在热冲击后或连续热冲击后恢复时增加,但整体的炎症媒介表达没有增强.
结论:
- 急性热冲击可以降低牛子宫内膜上皮细胞对LPS的先天免疫反应,而不会影响细胞活力或线粒体功能.
- 在热应激下改变子宫内膜免疫功能可能会导致乳牛的子宫疾病发病率增加.
- 了解这些细胞机制对于制定减轻热应激对乳牛健康影响的策略至关重要.
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