时间偏差在生理和免疫反应的内毒素挑战在牛犊的时间偏差
Zahoor Ahmad Pampori1, Aasif Ahmad Sheikh1, Fozia Shah1
1Division of Veterinary Physiology, Faculty of Veterinary Sciences & Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology - Kashmir, Srinagar, India.
Chronobiology international
|July 31, 2025
概括
牛犊对内毒素挑战的生理和免疫反应因一天中的时间而异. 了解牛免疫功能中的这些昼夜节律可以为更好的动物护理和疾病管理策略提供信息.
科学领域:
- 兽医免疫学 兽医免疫学
- 动物生理学 动物生理学
- 时间生物学 时间生物学
背景情况:
- 牲畜对全球粮食和营养安全至关重要,需要最佳的动物护理.
- 已知循环节律会影响对生理挑战的免疫内分泌反应.
- 牛的健康管理可以从了解免疫反应的时间依赖的变化中获益.
研究的目的:
- 调查昼夜计时对牛犊对内毒素挑战的生理和免疫反应的影响.
- 为了确定一天中不同时间给予内毒素是否会引起直肠温度,心率,呼吸率和免疫标志物的不同反应.
- 基于牛免疫功能的日间变化,探索兽医学中慢性治疗的潜力.
主要方法:
- 十五只青春期前的牛犊被分为早晨,下午和晚上组.
- 小牛在早上6点,下午2点或晚上10点接受静脉内毒素挑战 (大肠杆菌055:B5).
- 在挑战后的12小时间隔收集生理参数和血液样本,以分析免疫标记物 (IL-1β,IL-6,IL-10,TNF-α) 和血糖.
主要成果:
- 在挑战后的早晨小组中,生理反应 (直肠温度,心率,呼吸率) 显著更高.
- 总白细胞计数和血糖在内毒素挑战后显示下降.
- 挑战后免疫标记物 (IL-1β,IL-6,IL-10,TNF-α) 升高,晚上组的IL-1β最低,早上组的IL-6,IL-10,TNF-α最低.
结论:
- 牛犊在24小时的昼夜周期中对内毒素挑战有不同的反应.
- 免疫反应的循环变化可以影响牛群的疾病进展和治疗结果.
- 这些发现表明,慢性治疗在兽医学中的潜在应用是为了优化治疗策略.
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