中国农业科技导报 ›› 2020, Vol. 22 ›› Issue (7): 117-123.DOI: 10.13304/j.nykjdb.2019.0553

• 动植物健康 • 上一篇    下一篇

不同宿主源弓形虫ROP16基因的遗传变异分析

黄勉1,冯伟利2,植广林1,杨子鹏2,左珂菁1,杨晓颖2,陈绚姣1,袁浩2,袁子国2*   

  1. 1.广州动物园, 广州 510070; 2.华南农业大学兽医学院, 广州 510642
  • 收稿日期:2019-07-08 出版日期:2020-07-15 发布日期:2019-10-22
  • 通讯作者: *通信作者 袁子国 E-mail: ziguoyuan@scau.edu.cn
  • 作者简介:黄勉 E-mail: 876894631@qq.com;
  • 基金资助:
    国家重点研发计划项目(2018YFD0501200);广州动物园专项项目(h2016141);广东省重点领域研发计划项目(2019B020218004);国家自然科学基金项目(31972707);广东省自然科学基金项目(2019A1515011534)。

Genetic Variation Analysis of ROP16 Gene in Toxoplasma gondii From Different  Isolates

HUANG Mian1, FENG Weili2, ZHI Guanglin1, YANG Zipeng2, ZUO Kejing1, YANG Xiaoying2, CHEN Xuanjiao1, YUAN Hao2, YUAN Ziguo2*   

  1. 1.Guangzhou Zoo, Guangzhou 510070, China; 2.College of Veterinary Medicine, South China Agricultural University, Guangzhou 51064, China
  • Received:2019-07-08 Online:2020-07-15 Published:2019-10-22

摘要: 为研究不同分离株弓形虫棒状体蛋白ROP16基因的遗传变异,扩增9种不同来源的弓形虫样品的ROP16基因,并对其序列进行比对及构建进化树的分析。结果表明,弓形虫不同分离株ROP16序列的同源性均在990%以上,但存在限制性位点多态性;用弓形虫ROP16作为PCR-RFLP的标记分子,未能鉴别出传统的弓形虫Ⅰ型、Ⅱ型、Ⅲ型,却鉴定出一株特殊的猪源弓形虫分离株。弓形虫ROP16基因的株间保守性提示其是一个用于预防弓形虫病的潜在疫苗候选分子,值得对其进行深入研究。

关键词: 弓形虫, ROP16, 遗传变异, 序列分析, PCR-RFLP

Abstract: To study the heritable variation of ROP16 gene (TgROP16) of   different Toxoplasma gondii strain, this paper amplified and analyzed TgROP16 gene sequences of the strains from different hosts and geographical locations. Phylogenetic analysis of TgROP16 genes from the examined T.gondii isolates was conducted with MEGA 5.05 using the Maximum Likelihood method program. Variation in TgROP16 sequences among the 9  examined T. gondii isolates were low with a homology of more than 99.0%. Phylogenetic analysis of the sequences of TgROP16 gene showed that the clustering of the 9 T. gondii isolates was not matched to the three classical genotypes. The results suggested that TgROP16 gene might be a promising vaccine candidate against all genotypes of toxoplasmosis because of its highly conservation among different strains.