已经存在的抗牛流感病毒H5N1的中和抗体可以在未暴露的个体中检测到
Katharina Daniel1, Leon Ullrich1, Denis Ruchnewitz2
1Laboratory of Experimental Immunology, Institute of Virology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne 50931, Germany.
Immunity
|January 31, 2026
概括
人类感染禽流感A病毒H5N1分类2.3.4.4b的感染是一个流行病问题. 这项研究发现H5N1原始个体具有部分预先存在的免疫力,具有已识别的抗体,可以对H5N1德克萨斯菌株提供保护.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 公共卫生 公共卫生
背景情况:
- 禽流感 A 病毒 H5N1 类 2.3.4.4b 从牛传播到人类的信号传染疫情的风险.
- 了解先前存在的免疫力对于管理病毒感染和预测疾病严重程度至关重要.
研究的目的:
- 评估没有先前接触H5N1的个体对H5N1 A/Texas/37/2024菌株的幽默免疫反应.
- 描述抗体对这种新出现的H5N1菌株的中和能力和交叉反应性.
主要方法:
- 结合和中和试验对66名H5N1原始个体进行,对抗76个流感A病毒分离物.
- 克隆和鉴定了136个来自B细胞的单克隆抗体.
- 用小鼠模型来评估对致命的H5N1病毒的保护.
主要成果:
- 与A/Texas/37/2024相比,观察到低但可检测到的交叉中和标位,与H1N1和H3N2菌株相比,其活性降低.
- 在六个个个体中,有五个个体中发现了针对A/Texas/37/2024的强有力的中和抗体.
- 这些抗体证明了H1的交叉中和,向血凝素 (HA) 干,并在小鼠中给予保护.
结论:
- 在H5N1原始人群中,对H5N1 A/Texas/37/2024菌株存在部分预先存在的幽默免疫力.
- 已识别的单克隆抗体代表了潜在的治疗候选人和针对H5N1.1疫苗开发的目标.
- 需要进一步的研究才能充分理解这种交叉免疫力对流行病准备的影响.
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