肝转录组对禽病原性大肠杆菌感染的反应,在用皮质治疗的 brojlers 中
Mengru Chen1, Yifei He1, Yimin Jia1
1MOE Joint International Research Laboratory of Animal Health & Food Safety, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China; Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
Poultry science
|March 15, 2025
概括
由皮质 (CORT) 和禽病原性大肠杆菌 (APEC) 引起的 brojler 压力会损害生长和肝功能. CORT预治疗可以通过增强免疫反应和脂质代谢来减轻APEC诱导的肝损伤.
科学领域:
- 兽医免疫学 兽医免疫学
- 禽类病理学 禽类病理学
- 压力生理学 压力生理学
背景情况:
- 禽类致病性大肠杆菌 (APEC) 导致家禽大幅损失.
- 家禽养殖涉及多种压力因素,包括皮质激素 (CORT) 暴露.
- 压力和APEC感染对家禽免疫力和健康的综合影响尚不清楚.
研究的目的:
- 为了研究皮质 (CORT) 管理和APEC感染对肉的影响.
- 评估CORT预处理如何影响肉对APEC挑战的反应.
- 探索潜在的分子机制,包括免疫反应和脂质代谢,在压力和感染下的 brojlers.
主要方法:
- brojlers 接受了皮下CORT给药7天,随后是肌内APEC挑战.
- 测量了生长性能参数 (体重,ADG,FCR).
- 分析了生理指标 (血皮质,H/L比,肝酶,免疫标记物) 和肝脏组织病理学.
- 进行了肝脏转录组分析,以确定差异表达基因 (DEG) 和丰富的通路.
主要成果:
- 无论是CORT治疗还是APEC感染,都对生长表现产生了负面影响.
- 综合压力和感染增加了压力激素和肝损伤标志物,但CORT预治疗减少了肝损伤和改善了免疫标志物 (LZM,TP,GLOB).
- 转录组分析揭示了与脂质代谢,免疫信号 (细胞因子-细胞因子受体,Toll-like受体,MAPK) 和类固醇激素生物合成相关的显著基因表达变化.
结论:
- 科尔特治疗和APEC感染显著损害肉生长,免疫功能和肝脏健康.
- 科尔特预处理表明,它对APEC诱导的肝损伤有保护作用,可能通过增强先天免疫力和调节脂质代谢.
- 脂质代谢在肉对压力和APEC感染的反应中发挥着关键作用,其中包括葡萄糖皮质体受体 (GR).
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