畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (4): 654-660.doi: 10.11843/j.issn.0366-6964.2014.04.021

• 基础兽医 • 上一篇    下一篇

IBDV感染鸡后外周血淋巴细胞PD-1及其配体PD-L1/PD-L2转录变化的初步分析

王爱国1,2,孙国鹏1,李博文1,2,岳锋1,张艳芳1,朱艳平1,银梅2,杨媛2,郭东光1,王选年1,2*   

  1. (1.新乡学院生物技术研究中心生命科学与技术系,新乡 453003;2.河南科技学院动物科学学院,新乡 453003)
  • 收稿日期:2013-07-30 出版日期:2014-04-23 发布日期:2014-04-23
  • 通讯作者: 王选年,教授,E-mail:wangxuannian@163.com
  • 作者简介:王爱国(1988-),男,河南夏邑人,硕士研究生,主要从事动物病理学与免疫学研究,E-mail:agwangaiguo@163.com
  • 基金资助:

    国家自然科学基金(31272539)

An Elementary Analysis for PD-l,PD-L1 and PD-L2 Genes Transcription Level of Peripheral Blood Lymphoctes in Chicken after IBDV Infection

WANG Ai-guo1,2,SUN Guo-peng1,LI Bo-wen1,2,YUE Feng1,ZHANG Yan-fang1,ZHU Yan-ping1,YIN Mei2 ,YANG Yuan2,GUO Dong-guang1,WANG Xuan-nian1,2*   

  1. (1.College of Life Science and Biotechnology,Biotechnology Research Center,Xinxiang University,Xinxiang 453003, China;2.College of Animal Sciences,Henan Institute of Science and Technology,Xinxiang 453003, China)
  • Received:2013-07-30 Online:2014-04-23 Published:2014-04-23

摘要:

建立鸡PD-1及配体PD-L1/PD-L2 SYBR Green Ⅰ实时荧光定量RT-PCR检测方法,并用所建立的方法研究和分析雏鸡感染IBDV的不同阶段体内PD-1及配体PD-L1/PD-L2 的转录变化。根据 GenBank中PD-1、PD-L1和PD-L2的基因序列,分别设计特异引物扩增目的基因,得到各自阳性克隆质粒,以阳性质粒作为标准品建立标准曲线,并进行敏感性、特异性和重复性试验。应用所建立的实时荧光定量RT-PCR方法对4周龄健康雏鸡人工感染IBDV后第3、5、7、10天PBMC中PD-1及配体PD-L1/PD-L2 的转录变化进行检测,同时用半定量RT-PCR方法以及IBDV快速检测试纸条对病毒感染后各时间点法氏囊组织中IBDV的载量进行检测。结果表明,建立的方法在1×101~1×109 copies·μL-1模板范围内具有良好的线性关系(R2>0.99),可检测至少101 copies·μL-1的阳性标准样品,且具有较好的特异性和重复性。IBDV感染后,病毒在雏鸡体内复制逐渐增加,至第5天病毒载量达到最高。实时荧光定量RT-PCR检测结果表明,PD-1及配体PD-L1/PD-L2 在病毒感染后不同阶段转录量均有所升高,其中PD-1在病毒感染后第7天显著(P<0.05)升高,在病毒感染后第3天PD-L1极显著(P<0.01)升高,PD-L2显著(P<0.05)升高。本研究成功建立了PD-1及配体PD-L1/PD-L2 实时荧光定量RT-PCR检测方法;并应用该方法初步分析了PD-1及配体PD-L1/PD-L2 在IBDV感染不同阶段的转录变化,发现IBDV感染后不同阶段PD-1及配体PD-L1/PD-L2 的转录均升高,且PD-L1、PD-L2 的转录先于PD-1升高,并与病毒载量呈正相关。

Abstract:

An assay of SYBR Green Ⅰ real-time fluorescent quantitative RT-PCR was established to investigate the expression pattern of chicken PD-l,PD-L1 and PD-L2  genes at different stages after IBDV infection.The specific primers were designed according to the sequences of PD-l,PD-L1 and PD-L2  from GenBank to amplify the objective genes for corresponding plasmids construction,and then they were used as quantitative template to construct the standard curve and melting curve for detection sensitivity,specificity and repeatability.The established SYBRS Green Ⅰ real-time fluorescent quantitative PCR (Rea1 time FQ-PCR) assay worked well with a good coefficient correlation(R2>0.99) while the template concentration was from 1×101-1×109 copies·μL-1,the sensitivity was sufficient to detect at least 101 copies of the samples.The relative transcription levels of chicken PD-l,PD-L1 and PD-L2 mRNA in PBMCs from chicken were detected on the 3rd,5th,7th and 10th day after IBDV infection by the developed Rea1 time FQ-PCR assay.At the same time,the semi quantitative RT-PCR and IBDV rapid test strip for detection were carried out to analyze the viral loads in bursal tissue.Real-time RT-PCR analysis show that the expression of PD-1 increased significantly (P<0.05) in the 7th day after infection,the expression of PD-L1 and PD-L2  increased significantly (P<0.01,P<0.05) in the 3rd day after infection and the IBDV loads in bursal tissue are highest in the 5th days after infection.The established assay was able to detect the expression of the three genes in PBMC.Our results revealing the pattern of chicken PD-l,PD-L1 and PD-L2 genes at different stages after IBDV infection,which showed that the gene transcription increased positively correlated with IBDV loads,and PD-L1 , PD-L2 increasing transcription precede PD-1.

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