畜牧兽医学报 ›› 2020, Vol. 51 ›› Issue (8): 1956-1969.doi: 10.11843/j.issn.0366-6964.2020.08.020

• 预防兽医 • 上一篇    下一篇

马立克病病毒编码的miR-M4-5p调控宿主靶基因的筛选及鉴定

苏芮1,2,3, 滕蔓2,3, 李会珍1,2,3, 郑鹿平2,3, 刘豪丽2,3,4, 刘金玲2,3, 朱志坚2,3, 罗俊2,3,4, 张改平1,2,5*   

  1. 1. 河南农业大学牧医工程学院, 郑州 450002;
    2. 河南省农业科学院动物免疫学重点实验室, 农业部动物免疫学重点实验室, 河南省动物免疫学重点实验室, 郑州 450002;
    3. 河南省农业科学院, 中英禽病国际研究中心, 郑州 450002;
    4. 河南科技大学动物科技学院, 动物疫病与公共安全重点实验室, 洛阳 471003;
    5. 扬州大学江苏高校动物重要疫病与人兽共患病防控协同创新中心, 扬州 225009
  • 收稿日期:2020-01-17 出版日期:2020-08-25 发布日期:2020-08-19
  • 通讯作者: 张改平,主要从事动物免疫学及重大疫病快速检测技术研究,E-mail:zhanggaip@126.com
  • 作者简介:苏芮(1995-),女,河南卫辉人,硕士生,主要从事病毒分子致病机制研究,Tel:0371-65756056,E-mail:919608211@qq.com
  • 基金资助:
    国家自然科学基金(U1604232;31602050);中原千人计划-中原基础研究领军人才;河南省重点研发与推广专项(192102110072);河南省农业科学院杰出青年科技基金(2019JQ01)

Screening and Characterization of the Host mRNA Targets for the miR-M4-5p Encoded by Marek's Disease Virus

SU Rui1,2,3, TENG Man2,3, LI Huizhen1,2,3, ZHENG Luping2,3, LIU Haoli2,3,4, LIU Jinling2,3, ZHU Zhijian2,3, LUO Jun2,3,4, ZHANG Gaiping1,2,5*   

  1. 1. College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China;
    2. Key Laboratory of Animal Immunology of Ministry of Agriculture&Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    3. UK-China Centre of Excellence for Research on Avian Diseases, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    4. Key Laboratory of Animal Disease and Public Safety, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, China;
    5. Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
  • Received:2020-01-17 Online:2020-08-25 Published:2020-08-19

摘要: 血清1型马立克病病毒(MDV-1)感染引起的鸡马立克病(MD)一直以来被认为是研究病毒诱导肿瘤发生机制的理想模型。此前研究发现,MDV-1编码的miR-M4-5p是宿主癌基因miR-155的病毒同源物,从基因组中敲除miR-M4-5p可显著降低MDV-1的致病性和致瘤性,表明miR-M4-5p可能是MDV-1诱导肿瘤发生的重要调控因子。为进一步揭示miR-M4-5p的调控机制,以CEF细胞总RNA反转录产物cDNA为模板,利用hybrid-PCR技术构建了miR-M4-5p的候选靶基因文库。通过基因克隆、PCR鉴定及序列比对分析,获得128个候选基因序列,有73个基因的3'-UTR存在miR-M4-5p的潜在结合靶点,其中23个3'-UTR结合靶点与miR-M4-5p完全互补配对。通过双荧光素酶报告试验和qRT-PCR分析,对miR-M4-5p与3'-UTR的体内外相互作用以及候选靶基因的表达水平进行分析和验证,最终鉴定DPTTMEM230和DCLK1为miR-M4-5p调控的宿主靶基因。本研究为后续进一步阐明miR-M4-5p在MD肿瘤发生中的调控机制奠定了重要基础。

关键词: MDV, miRNA, 宿主靶基因, 肿瘤发生, hybrid-PCR

Abstract: Marek's disease, a rapid-onset neoplastic disease in poultry caused by the serotype 1 Marek's disease virus (MDV-1), has been historically regarded as an ideal model for the research on virally-induced cancers. Previous studies have demonstrated that the deletion of the miR-M4-5p, a viral analog of cellular oncogene miR-155 encoded by MDV-1, from the viral genome significantly reduces virus pathogenicity and oncogenicity, suggesting an important regulatory role responsible for MD tumorigenesis. To further reveal the regulatory mechanism mediated by miR-M4-5p in MD biology, we used CEF total cellular RNA as the template to produce a cDNA library utilizing the hybrid-PCR, for screening the host mRNA targets for miR-M4-5p. A total of 128 candidate host genes were obtained, of which there are 73 candidate binding sites were located in the 3'-UTRs and 23 of them contain the perfect matches of miRNA:mRNA. Further experiments of the dual luciferase reporter assay (DLRA) and the quantitative real-time PCR (qRT-PCR) analysis characterized three host genes, DPT, TMEM230 and DCLK1, as the in vivo targets for miR-M4-5p. Our work provides an important basis for further elucidating the regulatory mechanism of miR-M4-5p in MD oncogenesis.

Key words: Marek's disease virus, miRNA, host candidate target gene, oncogenesis, hybrid-PCR

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