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设计的小蛋白有效抑制并保护MERS-CoV

Robert J Ragotte^1,2, M Alejandra Tortorici¹, Nicholas J Catanzaro³

¹Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.

bioRxiv : the preprint server for biology

|November 22, 2024

概括

新型迷你蛋白质通过阻止病毒的进入来中和中东呼吸综合征冠状病毒 (MERS-CoV). 鼻内注射在小鼠中显示出保护作用,为这种危险病毒提供了潜在的新治疗策略.

科学领域:

病毒学病毒学
药物发现药物发现药物发现
免疫学免疫学免疫学

背景情况:

中东呼吸综合征冠状病毒 (MERS-CoV) 是一种动物性病毒,人类病例死亡率高.
目前还没有批准的疫苗或治疗方法用于人类或其驼储存库的MERS-CoV.

研究的目的:

通过计算设计高亲和度小蛋白来准MERS-CoV尖端 (S) 糖蛋白.
评估这些小蛋白质的广泛中和能力和作用机制.
评估小蛋白作为潜在的MERS-CoV对策的体内有效性.

主要方法:

单质和同质寡质微蛋白的计算设计.
在体外中和测定对一个面板的MERS-CoV S变体.
对MERS-CoV受体结合域 (RBD) 的迷你蛋白结合和与DPP4受体结合的竞争的分析.
在MERS-CoV小鼠模型中使用鼻腔注射进行体内预防性疗效研究.

主要成果:

设计的迷你蛋白显示出与MERS-CoV S糖蛋白结合的高亲和力.
迷你蛋白质通过向保存的RBD部位,广泛中和了多种不同的MERS-CoV变体.
迷你蛋白质通过与DPP4受体结合竞争来阻止病毒的附着和膜融合.
在一个MERS-CoV小鼠挑战模型中,微蛋白的鼻内注射赋予了预防性保护.

结论:

经过计算设计的小蛋白质代表了对MERS-CoV.病毒的有前途的治疗策略.
这些小蛋白质提供广泛的中和作用,并通过一种针对病毒进入的新机制起作用.
这些小蛋白的进一步临床开发是作为对MERS-CoV. 下一代对策的必要.

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