中国畜牧兽医 ›› 2022, Vol. 49 ›› Issue (11): 4346-4355.doi: 10.16431/j.cnki.1671-7236.2022.11.025

• 预防兽医 • 上一篇    下一篇

基于F和HN蛋白的基因Ⅶ型新城疫病毒嵌合疫苗的构建及免疫效力评估

李丽1,2,3, 王国康1,2,3,4, 商雨1,2,3, 徐英英1,2,3, 冯贺龙1,2,3, 汪宏才1,2,3, 张蓉蓉1,2,3, 曾哲1,2,3, 罗青平1,2,3, 邵华斌1,2,3, 曾驰4, 温国元1,2,3   

  1. 1. 湖北省农业科学院畜牧兽医研究所, 武汉 430064;
    2. 农业农村部畜禽细菌病防治制剂创制重点实验室, 武汉 430064;
    3. 畜禽病原微生物学湖北重点实验室, 武汉 430064;
    4. 武汉轻工大学生物与制药工程学院, 武汉 430023
  • 收稿日期:2022-04-01 出版日期:2022-11-05 发布日期:2022-11-04
  • 通讯作者: 温国元 E-mail:wgy_524@163.com
  • 作者简介:李丽,E-mail:734267021@qq.com;王国康,E-mail:965012690@qq.com。
  • 基金资助:
    湖北省自然科学基金杰出青年人才项目(2019CFA071);国家自然科学基金面上项目(31873018);国家现代农业产业技术体系(CARS-41-G13);湖北省农业科技创新中心项目(2019-620-000-001-017);湖北省科技创新项目重大专项(2020ABA016)

Construction and Immune Efficacy Evaluation of a Genotype Ⅶ Newcastle Disease Virus Chimeric Vaccine Based on F and HN Proteins

LI Li1,2,3, WANG Guokang1,2,3,4, SHANG Yu1,2,3, XU Yingying1,2,3, FENG Helong1,2,3, WANG Hongcai1,2,3, ZHANG Rongrong1,2,3, ZENG Zhe1,2,3, LUO Qingping1,2,3, SHAO Huabin1,2,3, ZENG Chi4, WEN Guoyuan1,2,3   

  1. 1. Institute of Animal Husbandry and Veterinary, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
    2. Key Laboratory of Prevention and Control Agents for Animal Bacteriosis, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China;
    3. Hubei Provincial Key Laboratory of Animal Pathogenic Microbiology, Wuhan 430064, China;
    4. School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
  • Received:2022-04-01 Online:2022-11-05 Published:2022-11-04

摘要: 【目的】 试验旨在构建一种基因Ⅶ型新城疫病毒(Newcastle disease virus,NDV)嵌合疫苗,并对其免疫效力进行评估。【方法】 利用反向遗传学技术,以含有禽偏禽腮腺炎病毒2型(Avian metaavulavirus-2,AMAV-2) Y2株基因组的重组质粒pT7-Y2为模板,将Y2株的F和HN蛋白的胞外区替换为基因Ⅶ型NDV HB0901株的F和HN蛋白的胞外区,将HB0901株的F蛋白裂解位点突变为LaSota弱毒株的F蛋白裂解位点,构建嵌合重组病毒rY2-FHNR株。对rY2-FHNR株的增殖特性、致病力及遗传稳定性等生物学特性进行检测,并通过接种2周龄SPF鸡评估rY2-FHNR株的免疫原性及其免疫血清与Y2株的交叉反应性,利用NDV NP蛋白的间接ELISA方法对免疫血清进行检测,验证其鉴别诊断效果。【结果】 试验成功获得了嵌合重组病毒rY2-FHNR株,生物学特性检测结果显示,rY2-FHNR株在鸡胚中的增殖滴度和致病性符合弱毒特征,其鸡胚传代的遗传稳定性良好。rY2-FHNR株可诱导机体产生针对NDV的抗体,且免疫血清不与rY2株抗原发生交叉反应。通过NDV NP ELISA抗体检测方法可以实现区分疫苗免疫与野毒感染。【结论】 本试验研发了一种基因Ⅶ型NDV嵌合候选疫苗,为基因Ⅶ型NDV的监测、防控和净化提供了技术支撑。

关键词: 新城疫病毒(NDV); 基因Ⅶ型; 禽偏禽腮腺炎病毒血清2型(AMAV-2); 反向遗传技术; 嵌合疫苗

Abstract: 【Objective】 This study was aimed to construct a genotype Ⅶ Newcastle disease virus (NDV) chimeric vaccine, and access its immune efficacy.【Method】 The F and HN protein ectodomains of recombinant plasmid pT7-Y2 of the Avian metaavulavirus-2 (AMAV-2) Y2 strain were replaced with the corresponding F and HN protein ectodomains of genotype Ⅶ NDV HB0901 strain by utilizing reverse genetic technology.Then F protein cleavage site of HB0901 strain was transformed into that of lentogenic LaSota strain, and the chimeric virus was recovered and named rY2-FHNR.The growth characteristics, pathogenicity and genetic stability of rY2-FHNR strain were evaluated, then 2-week-old SPF chickens were immunized with rY2-FHNR to determine the immunogenicity and cross-reactivity between immune serum and Y2 strain.The immune serum was identified by indirect NDV NP ELISA to verify its diagnosis effect.【Result】 Chimeric recombinant virus strain rY2-FHNR was constructed successfully.The biological characteristics results showed that the proliferation titer and pathogenicity in chicken embryos of rY2-FHNR strain were avirulent, while the chimeric virus was genetic stable when serially passaged in chicken embryos.Immunization with rY2-FHNR stimulated antibodies against NDV, and the immune serum had no cross-reactivity with rY2 strain.Through indirect NDV NP ELISA could distinguish infected animals from vaccinated animals.【Conclusion】 This study developed a genotype Ⅶ NDV chimeric vaccine candidate, which could be used as chimeric vaccine, provided technological support for the monitoring, prevention and eradication of genotype Ⅶ NDV.

Key words: Newcastle disease virus (NDV); genotype Ⅶ; Avian metaavulavirus-2(AMAV-2); reverse genetic technology; chimeric vaccine

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