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受到Arg171和Lys176编码的羊-PrP多态变体的子感染的菌株依赖性易感性

Juan Carlos Espinosa¹, Natalia Fernández-Borges¹, Alba Marin-Moreno¹

¹Centro de Investigación en Sanidad Animal (CISA-INIA-CSIC), Valdeolmos, 28130 Madrid, Spain.

The Journal of infectious diseases

|April 15, 2025

概括

羊蛋白 (PrP) 变种R171和K176提供了对古典尖病的保护. 这些多态度以取决于菌株的方式限制了子的传播,有助于子菌株的歧视.

科学领域:

兽医医学兽医医学兽医医学
神经科学是一个神经科学.
分子生物学分子生物学

背景情况:

绵羊的古典性疹是由多种菌株引起的,与流行性古典性牛形脑病变 (BSE) 不同.
在β2-α2循环区域的绵羊蛋白 (PrP) 多态 R171 和 K176 与预防古典草病有关.
了解这些多态性对于管理牲畜中的性疾病至关重要.

研究的目的:

调查R171和K176羊PrP变体对不同子菌株的保护作用.
评估表达这些变异的转基因小鼠模型对各种子分离物的敏感性和耐药性.
确定这些变体在区分不同菌株的有用性.

主要方法:

转基因小鼠线 (R171-Tg552和K176-Tg570) 的生成,表达特定的绵羊 PrP 多态变体.
这些小鼠线的内挑战与各种菌株组成的小组,包括经典的疹和BSE分离物.
在转基因小鼠中对子传播和疾病进展的表征.

主要成果:

两种R171和K176小鼠线都显示出高易感性和较长的存活时间与非典型的黄病分离物.
在R171-Tg552小鼠中,古典性疹分离物被完全阻断,而在K176-Tg570小鼠中则受到很大限制.
在适应后,在R171-Tg552小鼠中,只有BSE传播才成功,而K176-Tg570小鼠在羊中传播后仍然具有耐药性.

结论:

绵羊PrP的R171和K176多态变体以一种取决于菌株的方式限制了子的传播.
这些变体作为有价值的工具来区分子菌株.
这些发现对了解病病原体和开发诊断策略具有重要意义.

关键词:

牛乳腺硬化症 (BSE) 是一种严重的疾病.PrP多态变体的多态变体 PrP.牛的海绵状脑病变 (Bovine spongiform encephalopathy) 是一种疾病.普里昂菌株普里昂菌株草虫是一种草虫.传输屏障是传输的障碍.

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