›› 2013, Vol. 40 ›› Issue (10): 37-41.

• 生物技术 • 上一篇    下一篇

新城疫病毒基因Ⅲ型强毒JS/7/05/Ch的拯救

宋庆庆, 朱杰, 丁平云, 段志强, 屠颉, 刘晓文, 刘秀梵   

  1. 扬州大学农业部畜禽传染病学重点开放实验室, 江苏扬州 225009
  • 收稿日期:2013-04-15 出版日期:2013-10-20 发布日期:2013-12-19
  • 通讯作者: 刘秀梵 E-mail:xfliu@yzu.edu.cn
  • 作者简介:宋庆庆(1985-),男,山东人,博士生,研究方向:分子病原。
  • 基金资助:
    国家自然科学基金(31172338);现代农业产业技术体系建设专项资金(nycytx-41-G07);公益性行业(农业)专项经费(201003012)。

Rescue of Genotype Ⅲ Velogenic Newcastle Disease Virus Strain JS/7/05/Ch

SONG Qing-qing, ZHU Jie, DING Ping-yun, DUAN Zhi-qiang, TU Jie, LIU Xiao-wen, LIU Xiu-fan   

  1. Key Laboratory of Animal Infectious Diseases, Ministry of Agriculture, Yangzhou University, Yangzhou 225009, China
  • Received:2013-04-15 Online:2013-10-20 Published:2013-12-19

摘要: 新城疫病毒Ⅰ系苗Mukteswar株为中等毒力,野外分离株JS/7/05/Ch的基因组核苷酸与其具有高于99%的相似性,但其毒力却明显强于前者。为了给基因Ⅲ型NDV的遗传进化机制研究提供基础,本研究成功构建了JS/7/05/Ch株的反向遗传平台。首先根据GenBank上公布的基因Ⅲ型新城疫病毒JS/7/05/Ch株基因组全序列设计并合成8对引物,RT-PCR扩增目的片段后,分别依次亚克隆至pCR2.1载体中构建含有JS/7/05/Ch全长基因组cDNA的克隆质粒pJS/7/05/Ch,然后再通过特异性酶切位点将JS/7/05株全长基因组cDNA转移到TVT7R(0.0)转录载体中,成功构建出含JS/7/05/Ch株基因组全长cDNA的转录质粒pTVT/JS705。然后将该质粒与3个辅助质粒pCI-NP、pCI-P和pCI-L共转染BSR-T7/5细胞,转染60 h后将该细胞及其上清接种鸡胚;血凝(HA)试验和RT-PCR结果表明JS/7/05/Ch株新城疫病毒被成功拯救。

关键词: 新城疫病毒; 基因Ⅲ型; 反向遗传技术; 拯救

Abstract: The genome of JS/7/05/Ch isolate shared more than 99% nucleotide identity with that of Mukteswar strain. However, the pathogenicity of JS/7/05/Ch was much stronger than that of Mukteswar strain. In order to provide a good foundation for the further related research, we built the rescue system of JS/7/05/Ch in this study. Based on the genomic sequence of JS/7/05/Ch strain, eight pairs of primers were designed to amplify the genomic fragments by RT-PCR and cloned into pCR2.1 vector, to construct the plasmid pJS/7/05/Ch which contained the full-length cDNA of NDV. Then the full-length cDNA was transferred to TVT7R(0.0) vector to construct full-length NDV infectious clone, pTVT/JS705, using specific enzymes. The infectious clone together with three helper plasmids (pCI-NP, pCI-P and pCI-L) were cotransfected into BSR-T7/5 cell, and the transfection supernatant was inoculated into SPF embryonated eggs to rescue the virus. The results of HA and RT-PCR indicated that JS/7/05/Ch strain of NDV was successfully rescued.

Key words: Newcastle disease virus; genotype Ⅲ; reverse genetics technique; rescue

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