柯萨奇A组病毒16型疫苗候选株筛选

彭婕; 柳洁; 胡凌峰; 廖芸; 李琦涵; 范胜涛

doi:10.12259/j.issn.2095-610X.S20250402

柯萨奇A组病毒16型疫苗候选株筛选

doi: 10.12259/j.issn.2095-610X.S20250402

北京协和医学院/中国医学科学院医学生物学研究所，云南昆明　650118

基金项目: 国家重点研发计划项目（2023YFC2307900）；云南省创新疫苗技术与产业转化研发平台资助项目（202002AA100009）

详细信息

作者简介:
彭婕（2000～），女，陕西安康人，在读硕士研究生，主要从事病毒免疫相关工作

通讯作者:
范胜涛，E-mail：fst@imbcams.com.cn

中图分类号: R373.1
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出版历程
- 收稿日期: 2024-12-10
- 网络出版日期: 2025-04-05
- 刊出日期: 2025-04-25

Screening of Candidate Strains for Coxsackievirus Group A Virus Type 16 Vaccine

Institute of Medical Biology，Chinese Academy of Medical Sciences & Peking Union Medical College，Kunming Yunnan 650118，China

摘要

摘要: 目的筛选柯萨奇A组病毒16型（CA16）疫苗候选株，为手足口病疫苗研发提供前期基础。方法对2019年3月至2020年3月来自昆明市不同地区的35份手足口病患者临床标本进行细胞接种及连续传代，对产生细胞病变的收获液通过CA16标准血清进行鉴别试验，阳性样本通过病毒滴度测定、蚀斑纯化、VP1序列同源性及进化分析，筛选疫苗株。结果在收集的35份临床口咽拭子样本中，有23份出现细胞病变，经血清学鉴定10份为CA16病毒，阳性率为43.5%。10株病毒经适应性培养，病毒滴度逐渐升高，但从48 h开始趋于稳定，保持在7.0 lgCCID50。毒株蚀斑显示，所有毒株均可形成0.2～0.8 cm的空斑，呈现规则性差异，KM/M08蚀斑大小比较均一。所有毒株均为B1b型，核苷酸的同源性在93.3%～100%，其中KM/M08与其他毒株的同源性最高，在95.2%～100%之间。结论通过病毒增殖动力学曲线及其基因同源性、进化分析，KM/M08在上述各方面评价中都比较符合预期筛选标准，拟作为疫苗候选株进行后续研究。
- 手足口病 /
- CA16 /
- 疫苗株 /
- 进化分析
Abstract: Objective To screen Coxsackievirus A16 （CA16） vaccine candidate strains and provide preliminary basis for the development of vaccine against hand, foot and mouth disease （HFMD）. Methods Cell inoculation and continuous passage were performed on the 35 clinical specimens of patients with hand, foot, and mouth disease from different areas of Kunming. The harvested solution with cytopathic effects was identified using CA16 standard serum. Positive samples were screened for vaccine strains through the virus titer determination, plaque purification, VP1 sequence homology and evolutionary analysis. Results Among the 35 collected clinical oropharyngeal swab samples, 23 showed cellular lesions, and 10 were identified as CA16 virus by serology, with a positive rate of 43.5%. After the adaptive cultivation, the virus titers of 10 strains gradually increased, but stabilized at 7.0 lgCCID50 from 48 hours onwards. The plaque of the strain showed that all strains can form plaques of 0.2～0.8 cm, showing the regular differences, and the size of KM/M08 plaques was relatively uniform. All strains were B1b type, with nucleotide homology ranging from 93.3～100%. Among them, KM/M08 had the highest homology with other strains, ranging from 95.2～100%. Conclusion Through the analysis of virus proliferation kinetics curve, gene homology, and evolution, KM/M08 meets the expected screening criteria in all aspects of evaluation and is proposed as a vaccine candidate strain for further researches.
- Hand-foot-and-mouth disease /
- CA16 /
- Vaccine strains /
- Evolutionary analysis

HTML全文

图 1 10株病毒在Vero细胞上适应性生长（100×）

Figure 1. Adaptive growth of 10 viral strains on Vero cells （100×）

下载: 全尺寸图片幻灯片

图 2 10株病毒在Vero细胞增殖动力学分析

Figure 2. Kinetic analysis of the proliferation of 10 viruses in Vero cells

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图 3 10株病毒在Vero细胞蚀斑形态分析

Figure 3. Plaque morphology analysis of 10 virus strains in Vero cells

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图 4 10株病毒VP1基因的核苷酸同源性关系

Figure 4. Nucleotide homology of the VP1 gene of 10 viruses

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图 5 CA16毒株进化树构建及其分析

Figure 5. Construction and analysis of phylogenetic tree of CA16 strains

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图 6 KM/M08在Vero细胞上连续进行蚀斑克隆筛选

Figure 6. KM/M08 was serially screened for plaque clones on Vero cells

下载: 全尺寸图片幻灯片

表 1 VP1扩增引物序列

Table 1. Primer sequences for VP1 amplification

引物名称序列（5' –3' ）扩增长度（bp）

CA16-VP1F GGACTTCGGGTTGCAGTCTTCTG 1229

CA16-VP1R AGTCGTTATGCGTGGCAAGGTGT

下载: 导出CSV

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