畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (8): 1400-1408.doi: 10.11843/j.issn.0366-6964.2015.08.016

• 预防兽医 • 上一篇    下一篇

猪圆环病毒2型对小鼠淋巴细胞发育的抑制作用

吴斌1,肖惠1,胡林1,杨了寒1,叶十一2,何启盖2,蔡双双3,张淑君1*   

  1. (1.华中农业大学动物科技学院动物遗传育种与繁殖教育部重点实验室,武汉 430070;2.华中农业大学动物医学院农业微生物学国家重点实验室,武汉 430070;3.湖北三峡职业技术学院,宜昌 443000)
  • 收稿日期:2014-10-31 出版日期:2015-08-23 发布日期:2015-08-23
  • 通讯作者: 张淑君,教授,E-mail:sjxiaogzhang@mail.hzau.edu.cn
  • 作者简介:吴斌(1988- ),男,四川遂宁人,硕士生,主要从事动物抗病遗传育种研究,E-mail:wubinghao510902@163.com
  • 基金资助:

    国家自然科学基金(31272427);欧盟第七框架FP7项目(PIIF-GA-2012-328205)

The Study on the Inhibition of Mouse Lymphocyte Development Caused by Porcine Circovirus Type 2

WU Bin1,XIAO Hui1,HU Lin1,YANG Liao-han1,YE Shi-yi2,HE Qi-gai2,CAI Shuang-shuang3,ZHANG Shu-jun1*   

  1. (1.The Key Laboratory of Animal Genetics,Breeding and Reproduction of Education Ministry,College of Animal Science and Technology,Huazhong Agricultural University,Wuhan 430070,China;2.State Key Laboratory of Agricultural Microbiology,College of Veterinary Medicine,Huazhong Agricultural University,Wuhan 430070,China;3.Hubei Three Gorges Polytechnic,Yichang 443000,China)
  • Received:2014-10-31 Online:2015-08-23 Published:2015-08-23

摘要:

猪圆环病毒2型(PCV2)是引起仔猪断奶多系统衰竭综合征的病原微生物,该病毒可以降低免疫反应引起严重的免疫抑制,直接导致体内淋巴细胞的凋亡和耗竭。为研究PCV2对发育中淋巴细胞的影响,本文以小鼠为试验模型,用免疫荧光法统计骨髓、胸腺、脾CD3、CD19阳性淋巴细胞数,qPCR定量分析淋巴细胞发育相关基因转录水平,MTT法检测体外培养淋巴细胞增殖能力。结果表明:(1)PCV2造成感染早期小鼠外周血淋巴细胞不同程度减少,并抑制体外培养淋巴细胞的增殖;(2)PCV2导致骨髓和脾CD19阳性B淋巴细胞极显著降低(P<0.01),并抑制淋巴细胞发育相关基因的转录;(3)PCV2对发育中淋巴细胞的凋亡也有一定促进作用。因此,PCV2抑制早期淋巴细胞的发育和促进发育中淋巴细胞凋亡可能是导致体内淋巴细胞大量耗竭的原因之一。

Abstract:

Porcine circovirus type 2 (PCV2) is the pathogen of postweaning multisystemic wasting syndrome (PMWS),and can reduce immune reaction and cause serious immunosupression by causing the apoptosis and depletion of lymphocyte directly.To investigate the influence of PCV2 on the early development of lymphocyte,we used mice as experiment model,then selected immunofluorescence assay to detece the CD3,CD19 positive cell number in bone marrow,thymus and spleen,selected qPCR to quantify the gene expression involved in lymphocyte development,and selected MTT assay to test the lymphocyte proliferation ability in vitro.The result showed that:1) PCV2 decreased of lymphocyte in peripheral blood during the early infection stage and inhibited the proliferation ability in vitro;2) PCV2 decreased the number of CD19 positive cell significantly (P<0.01) in bone marrow and spleen,some important gene which are involved in the development of lymphocyte were inhibited significantly;and 3) PCV2 promoted the apoptosis of lymphocyte in development stage.Taken together,the results presented here demonstrate that PCV2 inhibits the development of lymphocyte and induces lymphocyte apoptosis may be one of the reasons causing lymphocyte depletion in PMWS case.

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