畜牧兽医学报 ›› 2017, Vol. 48 ›› Issue (10): 1920-1931.doi: 10.11843/j.issn.0366-6964.2017.10.015

• 预防兽医 • 上一篇    下一篇

同时监测8种牛常见病原体的GeXP高通量快速检测技术

范晴, 谢芝勋*, 谢志勤, 谢丽基, 黄莉, 黄娇玲, 张艳芳, 曾婷婷, 王盛, 罗思思, 邓显文, 刘加波, 庞耀珊   

  1. 广西兽医研究所 广西兽医生物技术重点实验室, 南宁 530001
  • 收稿日期:2017-04-07 出版日期:2017-10-23 发布日期:2017-10-23
  • 通讯作者: 谢芝勋,E-mail:xiezhixun@126.com
  • 作者简介:范晴(1982-),女,云南红河人,副研究员,主要从事牛病防治与病原分子生物学研究,Tel:0771-3120371,E-mail:fanqing1224@126.com
  • 基金资助:

    广西自然科学基金(2016GXNSFCA380003;2014GXNSFBA118105);桂科(AB16380003)。

Development of a GeXP Assay for Simultaneous Differentiation of 8 Pathogens of Bovine Infectious Diseases

FAN Qing, XIE Zhi-xun*, XIE Zhi-qin, XIE Li-ji, HUANG Li, HUANG Jiao-ling, ZHANG Yan-fang, ZENG Ting-ting, WANG Sheng, LUO Si-si, DENG Xian-wen, LIU Jia-bo, PANG Yao-shan   

  1. Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning 530001, China
  • Received:2017-04-07 Online:2017-10-23 Published:2017-10-23

摘要:

本研究旨在建立一种可同时检测8种常见牛传染病病原体(口蹄疫病毒、蓝舌病病毒、水疱性口炎病毒、牛病毒性腹泻病毒、牛轮状病毒、产肠毒大肠杆菌、牛传染性鼻气管炎病毒和小反刍兽疫病毒)的GeXP高通量快速检测方法。将多重PCR技术和毛细管电泳技术有效地结合,根据上述8种病原体的基因保守序列,设计并合成了8对特异性引物,在每对特异性引物的5'端加上一段通用引物,形成特异性嵌合引物。优化反应体系和反应条件,用单一病毒和混合病毒样品来验证所建立的GeXP方法的特异性,用克隆质粒稀释液来测试GeXP方法的灵敏度,检测305份临床样品,进一步验证该方法的可靠性。结果:优化后的GeXP检测体系,可扩增出各病原体对应的特异片段,能在100拷贝·μL-1水平同时并特异地检测出8种牛病病原体核酸。305份临床样品的检测结果与荧光PCR检测结果一致,阳性样品测序结果表明无非特异性扩增的假阳性。结果显示,所建立的GeXP方法具有高通量、特异性好、灵敏度高、方便快速等优点,可用于临床鉴别诊断和流行病学调查,具有较高的临床应用价值。

Abstract:

The aim of this study was to develop a multiple PCR assay on a basis of Genome Lab Genetic Expression Analysis System (GeXP) for simultaneous detection of 8 pathogens of bovine infectious diseases, including food-and-mouth disease virus (FMDV), bluetongue virus (BTV) ,vesicular stomatitis virus (VSV), bovine viral diarrheal virus (BVDV), bovine rotavirus (BRV), enterotoxigenic E. coli (ETEC), bovine herpesvirus 1 (IBRV), Peste des petits ruminants virus (PPRV). The GeXP profilerutilisesgene-specific primers containing 5'-universal adaptor sequences. Eight gene-specific primers consist of a universal sequence fused to the 5'-end and a gene-specific sequence were designed according to the conserved sequence of each pathogen and used for amplification.The reaction system and condition were optimized. The specificity of GeXP were examined with samples of the single and mixture of 8 viruses' co-infection. The sensitivity was evaluated by performing the assay on serial 10-fold dilutions of cloned plasmids. And 305 clinical samples were detected by GeXP to further evaluate the reliability. The results showed that the corresponding specific fragments of genes were amplified respectively. The detection limit of GeXP was 100 copies·μL-1 when all of 8 pre-mixed plasmids containing target genes of 8 bovine pathogens. In detection of 305 clinical samples, the results of GeXP were consistent with real-time PCR completely. Analysis of positive samples by sequencing demonstrated that the GeXP assay had no false positive samples of nonspecific amplification. In conclusion, this GeXP assay is a high throughput, specific, sensitive, rapid and simple method for the detection of 8 pathogens of bovine infectious diseases. It is an effective tool applied to differential diagnosis rapidly for clinical samples and epidemiological investigation.

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