畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (5): 802-808.doi: 10.11843/j.issn.0366-6964.2014.05.018

• 预防兽医 • 上一篇    下一篇

猪圆环病毒2型感染仔猪肺泡巨噬细胞Toll样受体mRNA转录的变化

张亚群,韩俊源,郭华,陈萌萌,段滇宁,张书霞*   

  1. (南京农业大学动物医学院,南京 210095)
  • 收稿日期:2013-11-13 出版日期:2014-05-23 发布日期:2014-05-15
  • 通讯作者: 张书霞,教授,博导,主要从事动物分子病理学研究,Tel:025-84395316, E-mail:shuxia@njau.edu.cn
  • 作者简介:张亚群(1987-),男,山东曲阜人,硕士生,主要从事动物分子病理学研究,E-mail:zhangyaqun624@163.com
  • 基金资助:

    国家自然科学基金项目(31172292)

Changes of Toll-like Receptor mRNA Transcription in Alveolar Macrophages of Piglets Infected with Porcine Circovirus Type 2

ZHANG Ya-qun, HAN Jun-yuan, GUO Hua, CHEN Meng-meng, DUAN Dian-ning, ZHANG Shu-xia*   

  1. (College of Veterinary Medicine,Nanjing Agricultural University,Nanjing 210095, China)
  • Received:2013-11-13 Online:2014-05-23 Published:2014-05-15

摘要:

选用6头经ELISA和荧光定量PCR方法检测猪圆环病毒2型(PCV2)和猪繁殖与呼吸综合征病毒(PRRSV)血清抗体和抗原均为阴性的普通断奶仔猪,无菌分离肺泡巨噬细胞(AMs),分为对照组和PCV2感染组(PCV2组)进行体外培养,分别在培养0、6、12、24和48 h收集AMs。间接免疫荧光法定位检测PCV2感染AMs情况;荧光定量PCR方法检测TLR2、TLR3、TLR4、TLR7、TLR8和TLR9 mRNA转录量的变化。结果表明,TLR2 mRNA的转录量在感染后6 h迅速升高,12 h后又迅速下降,但仍显著高于对照组(P<0.01或P<0.05),到48 h时恢复;TLR3 mRNA的转录量,攻毒后6和12 h显著高于对照组(P<0.05),24和48 h时恢复到对照组水平;PCV2明显升高感染后12 h AMs 中TLR4 mRNA的转录(P<0.05),而明显抑制感染后24和48 h的转录(P<0.05);PCV2引起感染后6和12 h的AMs中TLR7、TLR8和TLR9 mRNA转录量显著升高(P<0.01或P<0.05),而到感染后24和48 h又恢复到对照组水平。结果表明,PCV2可显著影响体外培养仔猪AMs TLR2、TLR3、TLR4、TLR7、TLR8和TLR9 mRNA的转录。

关键词: 猪圆环病毒2型, 荧光定量PCR, 肺泡巨噬细胞, Toll样受体

Abstract:

Six conventional piglets free of porcine circovirus type 2 (PCV2) and porcine reproductive and respiratory syndrome virus (PRRSV) were used in this experiment as detected by ELISA and fluorescence quantitative PCR.The alveolar macrophages (AMs) were isolated aseptically and divided into two groups,control group and PCV2 infection group (PCV2 group) and cultured in vitro.The AMs were collected at 0,6,12,24 and 48 hours post infection (hpi).The amount of PCV2 infected cells was observed by indirect immunofluorescence assay (IFA) and the mRNA transcription of TLR2,TLR3,TLR4,TLR7,TLR8 and TLR9 were detected by real-time PCR.The results show that the mRNA levels of TLR2 were significantly higher at 6,12 and 24 h (hpi) (P<0.01 or P<0.05),then the levels were recovered at 48 hpi.The expression of TLR3 were significantly elevated at 6 and 12 hpi (P<0.05),and the transcription were then restored at 24 and 48 hpi; PCV2 stimulation up-regulated the transcriptions of TLR4 in AMs at 12 hpi (P<0.05) and down-regulated the transcriptions at 24 and 48 hpi (P<0.05); PCV2-infection increased TLR7,TLR8 and TLR9 transcriptions in AMs at 6 and 12 hpi (P<0.01 or P<0.05) and their of transcriptions were restored at 24 and 48 hpi.Thus,PCV2 can significantly affect TLR2,TLR3,TLR4,TLR7,TLR8 and TLR9 transcriptions in piglets AMs in vitro.

Key words: porcine circovirus type 2, RT-PCR, alveolar macrophages, Toll like receptors

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