中国疾病预防控制中心病毒病预防控制所,传染病溯源预警和智能决策全国重点实验室,国家卫生健康委员会医学病毒与病毒病重点实验室;中国医科大学公共卫生学院;
为制备一种安全、有效的人偏肺病毒(Human metapneumovirus,HMPV)假病毒阳性标准品,并用于核酸检测的质量控制,本研究对335条HMPV全基因序列比对分析,选择HMPV基因表达量高且进化较为保守的N基因构建重组假病毒颗粒。合成全长1 185 bp的N基因序列并与CD513B载体进行重组连接,采用第三代慢病毒包装体系构建HMPV假病毒颗粒,超速离心浓缩后感染HEK293T细胞,RT-qPCR核酸检测N基因和透射电镜观察鉴定重组假病毒颗粒,确定假病毒阳性标准品使用浓度,进一步评价阳性标准品的热稳定性和均一性。研究结果显示,包装获得的HMPV假病毒颗粒能够感染HEK293T细胞,假病毒颗粒为圆形或椭圆形病毒样结构,直径在150~200 nm之间,并带有G蛋白刺突。HMPV假病毒稀释103倍后Ct值最适于进行核酸检测,并且均一性和稳定性可达到阳性标准品要求。本研究成功构建了含有HMPV N基因全长的假病毒颗粒,可作为核酸检测方法的阳性标准品,实现HMPV核酸提取和核酸检测过程的全程质量控制。
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基本信息:
DOI:10.13242/j.cnki.bingduxuebao.004615
中图分类号:R373.1
引用信息:
[1]郑诗源,黄益曼,孟小草等.人偏肺病毒假病毒阳性标准品的制备与鉴定[J].病毒学报,2024,40(06):1263-1273.DOI:10.13242/j.cnki.bingduxuebao.004615.
基金信息:
中国疾病预防控制中心病毒病预防控制所青年科学基金(项目号:IVDC-202304),题目:基于铁蛋白的呼吸道合胞病毒和人偏肺病毒二联纳米颗粒疫苗研究~~