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通过PEDV毒性菌株和减弱菌株诱导的B细胞免疫反应的比较
Chen Yuan1,2, Xue Zhao1,2, Yawen Feng3
1College of Veterinary Medicine, Hebei Agricultural University, Baoding, China.
Frontiers in microbiology
|April 8, 2024
概括
猪流行性腹病毒 (PEDV) 根据猪年龄和病毒菌株不同影响猪B细胞. 有毒和减弱的PEDV菌株改变B细胞反应,影响不同年龄的猪的细胞因子分泌和抗体产生.
科学领域:
- 兽医免疫学 兽医免疫学
- 病毒学 病毒学
- 猪健康 猪健康
背景情况:
- B细胞对于免疫反应至关重要,包括抗体产生和细胞因子分泌.
- 猪流行性腹病毒 (PEDV) 感染期间B细胞的特定作用尚未完全理解.
- PEDV是一种影响所有年龄段的猪的重要病原体.
研究的目的:
- 调查病毒性 (QY2016) 和减弱 (CV777) PEDV菌株对不同年龄 (新生儿,幼儿园,母猪) 猪的B细胞的影响.
- 分析B细胞表面分子表达,细胞因子分泌和PEDV感染后抗体生产的变化.
主要方法:
- 从新生猪,托儿所猪和母猪中分离出B细胞.
- 细胞被感染了毒性PEDV-QY2016或减弱的PEDV-CV777菌株.
- 使用流式细胞计测试来评估表面分子表达 (CD54,CD27,CD80,MHC II,IgM).
- 测量了细胞因子分泌 (IFN-α,GM-CSF,IL-1,IL-4,TGF-β) 和抗体的产生 (IgA,IgM,IgG).
主要成果:
- 这两种PEDV菌株都在新生猪B细胞上增加了CD54和CD27的表达.
- 与PEDV-CV777.7相比,PEDV-QY2016感染导致新生儿B细胞的CD80,MHC II和IgM表达率较低.
- 这两种菌株都刺激了不同的细胞因子分泌,这取决于猪的年龄.
- 抗体 (IgA,IgM,IgG) 的分泌被诱导在幼猪和母猪中,但不是新生猪,在母猪中CV777感染后观察到更高的水平.
结论:
- PEDV感染显著改变B细胞表面分子表达,细胞因子分泌和抗体产生.
- 这些影响取决于猪的年龄和感染PEDV菌株的毒性.
- 这些发现突出了PEDV,B细胞和宿主年龄之间的复杂相互作用,决定了免疫结果.
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