| 摘要: |
| 目的 分析寨卡病毒基因组序列特征,建立寨卡病毒的核酸检测方法。方法 构建81种虫媒传播黄病毒和寨卡病毒的系统进化树,比较寨卡病毒与登革病毒4型、日本脑炎病毒的核酸和氨基酸序列差异,分析亚洲型和非洲型寨卡病毒基因变异位点,尤其是中国的4株输入性寨卡病毒基因序列。通过比较亚洲型和非洲型寨卡病毒全基因组核酸序列,设计一组寨卡病毒实时荧光定量PCR检测的引物和探针,并检测其敏感性与特异性。结果 81种虫媒传播黄病毒中,寨卡病毒与Spondweni、Kedougou病毒同源性最近。全基因组核酸序列比较结果显示寨卡病毒与登革病毒4型的同源性比日本脑炎病毒更近,而氨基酸序列比较结果显示寨卡病毒与日本脑炎病毒的同源性更近。与传统亚洲型寨卡病毒比较,广东GD01株有5个氨基酸突变位点,广东GDZ16001株有3个,浙江ZJ03株有6个,赣县VE Ganxian株有33个。所设计的PCR引物和探针对质粒标准品检测呈阳性,检测下限为100 拷贝/mL,对细胞培养的寨卡病毒RNA检测呈阳性,而对登革病毒1~4型和日本脑炎病毒检测呈阴性。结论 寨卡病毒与Spondweni病毒同源性最近,赣县VE Ganxian株的高变异显示寨卡病毒正在快速变异。本研究设计的PCR引物和探针可用于亚洲型和非洲型寨卡病毒株检测,具有较高的敏感性和特异性。 |
| 关键词: 寨卡病毒 病毒基因组 RNA序列分析 核酸检测 亚洲 |
| DOI：10.16781/j.0258-879x.2016.06.0661 |
| 投稿时间：2016-04-01修订日期：2016-05-11 |
| 基金项目:上海市卫生与计划生育委员会课题(20154Y125),上海市公共卫生三年行动计划重点学科建设项目(15GWZK0103). |
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| Zika virus: genome sequence analysis and nucleic acid detection methods |
| DI Hong-wei1△,PENG Hao-ran1△,ZHU Shan-bang2,ZHU Shi-ying1,QI Zhong-tian1,TANG Hai-lin1,ZHAO Ping1* |
(1. Department of Biological Defense(Microbiology), Shanghai Key Laboratory of Medical Biodefence, Faculty of Tropical Medicine and Public Health, Second Military Medical University, Shanghai 200433, China;
2. The 7th Team of Student Brigade, Administration Office for Undergraduate Students, Second Military Medical University, Shanghai 200433, China
△Co-first authors
*Corresponding author) |
| Abstract: |
| Objective To analyze the genome sequence characteristics of Zika virus and to develop nucleic acid detection methods for Zika virus. Methods The phylogenetic tree of 81 kinds of Flavivirus was constructed. The differences of nucleotide and amino acid sequence among Zika virus, type 4 dengue and Japanese encephalitis virus (JEV) were analyzed and compared. The gene mutated sites of Asian and African Zika virus, especially four Zika virus strains from China, were analyzed. A set of primers and probes of real-time quantitative PCR for Zika virus were designed after comparing the genome sequences of Asian and African Zika virus. Results Spondweni and Kedougou viruses were the closest homologously to Zika virus among 81 kinds of Flavivirus. Comparison of full genomic nucleic acid sequence showed that Zika virus was closer to type 4 dengue virus than JEV, whereas comparison of amino acid yielded an opposite result. Compared with traditional Asian type Zika virus, Guangdong GD01 strains had 5 amino acid mutated sites, Zhejiang ZJ03 strains had 6 mutated sites, and VE Ganxian strains had 33 mutated sites. Detection of designed PCR primers and probes for plasmid RNA was positive, with the lower limit of detection being 100 copies/mL and Zika virus RNA was detected to be positive, type 1-4 dengue virus and Japanese encephalitis virus being negative. Conclusion Zika virus and Spondweni virus are the closest homologously. The high mutation character of VE Ganxian strains indicates that Zika might evolve fast. PCR primers and probes designed in this paper can be used for Asian and African type Zika virus detection, with relatively higher sensitivity and specificity. |
| Key words: Zika virus viral genome RNA sequence analysis nucleic acid detection Asia |
