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在牛冠状病毒的核体蛋白上确定了第一个线性B细胞表位

Yulong Zhou¹, Jiawen Zhang², Hailiang Wu²

¹College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, 163319, China; Heilongjiang Provincial Technology Innovation Center for Bovine Disease Control and Prevention, Daqing, 163319, China; Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, Daqing, 163319, China.

|June 8, 2025

概括

研究人员在牛冠状病毒 (BCoV) 核体蛋白上发现了一个保存的表位. 这一发现对于开发BCoV和相关冠状病毒的特定诊断工具和疫苗至关重要.

科学领域:

兽医病毒学兽医病毒学
免疫学免疫学免疫学
分子生物学分子生物学

背景情况:

牛冠状病毒 (BCoV) 在牛群中造成重大经济损失,影响小牛的健康和乳制品生产.
由于其保存性质,BCoV的核体 (N) 蛋白是免疫反应和诊断发展的关键目标.
识别BCoV N蛋白质上的特定表位对创建敏感和准确的诊断方法和有效疫苗至关重要.

研究的目的:

识别和表征BCoV核体蛋白上保存的B细胞表位.
评估这些表位在诊断和疫苗开发方面的潜力.
调查已识别的表位的进化和跨物种影响.

主要方法:

用重组BCoV N蛋白对BALB/c小鼠进行免疫接种.
产生和表征N特异性单克隆抗体 (mAbs).
使用最小的识别碎片 (³⁸⁰YQQQDG³⁸⁵) 进行皮层映射.
对不同BCoV菌株和相关冠状病毒的表位序列的同质分析.

主要成果:

产生了两个N特异性单克隆抗体,2F9和7H6.
这些mAbs在BCoV N蛋白上识别了一个保存的线性B细胞表位 (YQQQDG) (³⁸⁰).
该表位在BCoV菌株中具有很高的保存性,但与其他动物冠状病毒的同质性较低,除了人类冠状病毒OC43和狗冠状病毒CRCoV/BJ-221外.

结论:

已识别的表位是开发BCoV. 病毒特定诊断工具的有价值的目标.
独特的交叉反应概况为冠状病毒的进化和物种间传播提供了洞察力.
这项研究促进了对BCoV N蛋白质结构和功能的理解,有助于疾病控制策略.

关键词:

抗原的表位是抗原的表位.这是一个BCoV.单克隆抗体是一种单克隆抗体.核体蛋白质是一种核体蛋白质.

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