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通过双重表位向合成抗体保护对致命的犬病毒感染

Melanie Scherer^1,2,3, Nadia Djabeur^2,4, Oliver Siering⁵

¹Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.

Nature communications

|January 7, 2026

概括

这项研究开发了针对犬病毒 (CDV) H蛋白的新型抗体,提供了强大的中和作用. 一种双型抗体在低剂量下保护了小鹿免受致命的CDV挑战,为新的Morbillivirus疗法铺平了道路.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
结构生物学结构生物学

背景情况:

麻疹病毒和犬病毒 (CDV) 等麻疹病毒,尽管有疫苗,但它们对健康构成重大风险.
CDV的受体结合 (H) 蛋白是抗病毒疗法的关键标.

研究的目的:

识别和描述针对CDV H蛋白的强效中和抗体.
探索新型的中和机制和治疗策略,用于morbilliviral感染.

主要方法:

对抗CDV H蛋白单一域抗体的鉴定和表征.
结构分析以确定H蛋白的脆弱部位.
在活体中测试四价抗体,两价抗体在模型中的有效性.

主要成果:

确定了两种强大的中和单一域抗体,它们针对CDV H蛋白的不同部位.
结构分析揭示了两个关键的中和表位,一个重叠在受体结合部位,另一个在二维接口.
一种工程双型抗体在低剂量 (1毫克/公斤) 的情况下,证明了对致命的CDV挑战的显著保护.

结论:

在单个抗体格式中结合多个中和机制,可以提高治疗效率.
这项研究为设计下一代治疗方法的设计提供了一个框架,用于对抗Morbillivirus和其他病毒病原体.
针对病毒H蛋白上不同表位的向,为开发广泛的抗病毒药物提供了一个有前途的战略.

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