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具有扩展遗传代码的减弱RNA病毒在PylRS-tRNACUAPyl转基因小鼠中引起可调节的免疫反应

Zhetao Zheng¹, Xuesheng Wu¹, Yu Wang¹

¹State Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.

|October 28, 2023

概括

合成生物学使得使用非自然氨基酸能够制造一种可控制的Enterovirus 71 (EV71) 病毒. 这种工程病毒在小鼠模型中表现出预防作用,这表明有可能开发针对RNA病毒的新型疫苗.

科学领域:

合成生物学合成生物学
病毒学病毒学
免疫学免疫学免疫学

背景情况:

核糖核酸 (RNA) 病毒带来了重大的公共卫生挑战.
合成生物学为人工控制病毒复制提供了潜力,有助于减弱策略.
目前控制病毒复制的方法在很大程度上处于探索阶段.

研究的目的:

使用遗传密码扩展设计一种可控制的Enterovirus 71 (EV71) 菌株.
为了研究工程病毒的体外和体内特征.
探索这项技术对抗RNA病毒的疫苗开发的潜力.

主要方法:

遗传密码扩展技术将非自然氨基酸 (UAA) 引入到EV71.1.
使用Nε-2-azidoethyloxycarbonyl-L-lysine (NAEK) 制造EV71-NAEK病毒.
在两个不同的小鼠模型中进行了体外感染测定和体内验证.

主要成果:

EV71-NAEK病毒在体外表现出NAEK剂量和时间依赖的感染.
用EV71-NAEK接种疫苗对新生小鼠提供了对致命挑战的保护.
在转基因小鼠中观察到可调节的中和抗体反应,这取决于外部NAEK剂量.

结论:

EV71-NAEK作为一种可控制的病毒,用于操纵毒性菌株,并作为免疫计划的基础.
该策略可适应其他病毒,如Coxsackievirus,证明了广泛的适用性.
这种方法为通过人工病毒控制开发新型疫苗候选人提供了有希望的方向.

关键词:

有缺陷的干扰颗粒.遗传密码扩张扩张复制无能力的病毒复制无能力的病毒病毒工程是病毒工程.病毒的演变病毒的演变

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