畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (6): 1247-1252.doi: 10.11843/j.issn.0366-6964.2016.06.021

• 基础兽医 • 上一篇    下一篇

Let-7a对犬流感病毒诱导细胞凋亡调控作用的初步研究

胡仁峻1,2,涂黎晴1,2,孙凌霜1,2,贾坤1,2,远立国1,2,李守军1,2*   

  1. (1.华南农业大学兽医学院,广州 510642;2.广东省兽医临床重大疾病综合防控重点实验室,广州 510642)
  • 收稿日期:2015-11-25 出版日期:2016-06-23 发布日期:2016-06-23
  • 通讯作者: 李守军,男,博士,教授,博士生导师,主要从事犬流感及其流行病学相关研究,E-mail:shoujunli@scau.edu.cn
  • 作者简介:胡仁峻(1990-),男,江苏盐城人,硕士生,主要从事犬流感感染与microRNA相关研究,E-mail:1149243709@qq.com
  • 基金资助:

    国家自然科学基金(31372448);公益性行业(农业)科研专项(201303042);广东省自然科学基金(S2013020013858);广东省促进科技服务业发展计划项目(2013B040200032);广东省科技计划项目(2013B020202001;2013B020224001);广东省兽医临床重大疾病综合防控重点实验室(2013A061401013)

Study on Regulation Function of Let-7a on Canine Influenza Virus Induced Cells Apoptosis

HU Ren-jun 1,2,TU Li-qing 1,2,SUN Ling-shuang 1,2,JIA Kun 1,2,YUAN Li-guo 1,2,LI Shou-jun 1,2*   

  1. (1.College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China;2.Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases,Guangzhou 510642,China)
  • Received:2015-11-25 Online:2016-06-23 Published:2016-06-23

摘要:

犬流感(CI)是由犬流感病毒(CIV)感染犬引起的传染性疾病,感染犬主要表现为急性呼吸道症状。为了探究犬microRNA let-7a对CIV诱导细胞凋亡的调控作用,在体外用CIV对MDCK细胞进行感染,通过AO/EB染色和流式细胞术检测是否能引起细胞凋亡,并用荧光定量PCR测定let-7a的转录水平,最后通过转染let-7a来评价其对于细胞凋亡的影响。结果表明,CIV能够引起MDCK细胞发生凋亡且被感染细胞内let-7a转录下调,而过转录细胞内let-7a则能够有效地抑制病毒诱导的凋亡。研究结果显示,犬let-7a在CIV感染细胞中起着抗凋亡作用,而let-7a的低转录促进了细胞凋亡,并且这一机制可能在CIV感染犬的呼吸道损伤中扮演了一定的角色。

Abstract:

Canine influenza (CI) is an infectious disease caused by canine influenza virus (CIV) infection,which is mainly manifested as acute respiratory symptoms.In order to explore the effect of let-7a on CIV induced cells apoptosis,MDCK cells were infected by CIV in vitro,and AO/EB staining and flow cytometry were used to detect cells apoptosis,and the transcription of let-7a was also determined by real time PCR,and the effect of let-7a on cell apoptosis was evaluated by the transfection of let-7a.The results showed that CIV could induce apoptosis of MDCK cells and downregulate the transcription of let-7a in infected cells,and over-transcription of let-7a could effectively inhibit the virus induced apoptosis.This study showe that let-7a plays an anti-apoptotic role in CIV infected cells,and the low transcription of let-7a promotes apoptosis,and this mechanism may play a role in the respiratory tract injury of CIV infected dogs.

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