中国疾病预防控制中心病毒病预防控制所,国家脊髓灰质炎实验室,世界卫生组织西太平洋区脊髓灰质炎参比实验室;传染病溯源预警与智能决策全国重点实验室;国家卫生健康委员会生物安全重点实验室;
埃可病毒11型(Echovirus 11,E11)是一种常被检出的肠道病毒,近年来在亚洲与欧洲地区多次报道由E11引发新生儿重症病例甚至导致死亡。自1994年E11在我国被首次检出后,其基因型历经多次更替。为探究基因型更替与型间交叉中和能力是否存在相关性,本研究选取了曾经在中国流行的A1、A2、C1、C3、D5以及E基因型的代表性毒株,依次进行噬斑试验、浓缩、纯化和灭活,随后与铝佐剂混合,于第0周、第2周、第4周,分三次对6周龄雌性BALB/c小鼠进行免疫。在末次免疫1周后,采集小鼠抗血清进行交叉中和效果评估。中和实验结果表明,不同基因型间的交叉中和能力存在显著差异。部分毒株能够突破前代毒株所形成的免疫保护屏障,这一现象与E11流行基因型转换的规律相契合。其中,D5基因型毒株展现出较高的免疫原性以及较为广谱的交叉保护特性,具备作为理想疫苗候选株的特征。同时,当前流行的D5基因型毒株抗血清对C1和C3基因型毒株提供的交叉保护作用有限,提示未来有可能出现新的基因型更替。此外,通过序列分析发现,VP1-BC loop和VP2-EF loop区域的差异可能对E11毒株的抗原性产生影响,进一步揭示了E11免疫逃逸的潜在机制。本研究系统地探讨了E11的交叉免疫效应及其对基因型更替的影响,为制订E11感染的防控策略和开展疫苗研发提供了重要的参考依据。
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基本信息:
DOI:10.13242/j.cnki.bingduxuebao.250051
中图分类号:R373.2
引用信息:
[1]刘莹,李冀琛,王蕊等.埃可病毒11型不同基因型间交叉中和效应及抗原性变异的初步研究[J].病毒学报,2025,41(02):291-300.DOI:10.13242/j.cnki.bingduxuebao.250051.
基金信息:
国家重点研究计划(项目号:2024YFC2310403),题目:新型肠道病毒疫苗的临床前研究; 北京市自然科学基金:(项目号:L234052),题目:我国手足口病病原谱及重要肠道病毒变异变迁规律~~