布鲁塞拉堕胎突变A19mut2的特征,这是一个潜在的DIVA疫苗候选人,对脂多糖酸盐进行了修改
Hosny Ahmed Abdelgawad1,2, Zhengmin Lian1, Yi Yin1
1Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai 200241, China.
Vaccines
|July 29, 2023
概括
一种新的布鲁塞拉DIVA疫苗候选人A19mut2通过修改B. abortusA19菌株来开发. 这种疫苗显示病毒性降低,同时保持保护性免疫力,并使血清诊断差异化.
科学领域:
- 兽医免疫学 兽医免疫学
- 细菌学 细菌学是一门学科.
- 疫苗开发 疫苗开发
背景情况:
- 布鲁塞拉堕胎会导致牛牛病,而A19疫苗菌株由于与毒性菌株相似的LPS抗原而带来诊断挑战.
- 目前的血清诊断方法难以区分疫苗接种和感染的动物.
研究的目的:
- 开发一种新的布鲁塞拉疫苗,使得感染者与接种疫苗的动物 (DIVA) 可以区分开来.
主要方法:
- 通过用大肠杆菌的wbdR基因替换wbkC基因来改造B. abortus A19mut2以修改O-多糖.
- 评估了A19mut2的生物表型,残留毒性和小鼠的保护功效.
- 评估 humoral 和细胞免疫反应,包括抗体水平和细胞因子生产.
主要成果:
- 与A19菌株相比,A19mut2在小鼠中表现出较低的毒性.
- 显著的幽默和细胞免疫反应是由A19mut2引起的,与A19.2相似.
- A19mut2免疫提供了对B. abortus S2308 NalR感染的保护,类似于A19.
结论:
- 该A19mut2突变体显示出作为未来DIVA牛肉病疫苗候选人的潜力.
- 这种修改后的疫苗可以通过血清学测定来更好地区分疫苗接种和感染的动物.
关键词:
布鲁塞拉流产 (Brucella abortus) 是一种流产.差异诊断是一种差异诊断.脂多糖类糖化物 (Lipopolysaccharide) 是一种脂多糖类糖.修改的意思是改变的意思.疫苗 疫苗 疫苗 疫苗更多相关视频
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