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2025年8月8日 星期五
农业生物技术学报  2023, Vol. 31 Issue (12): 2665-2673    DOI: 10.3969/j.issn.1674-7968.2023.12.020
  研究资源与技术改进 本期目录 | 过刊浏览 | 高级检索 |
弓形虫半巢式PCR实时荧光检测方法的建立
陈梦陶1, 朱龙佼2,3, 刘海燕4,*, 许文涛2,3,*
1 华北理工大学 公共卫生学院,唐山 063210;
2 中国农业大学 营养与健康系/食品精准营养与质量控制教育部重点实验室,北京 100083;
3 中国农业大学 食品科学与营养工程学院 转基因生物安全性评价(食品安全)重点实验室/食品质量与安全北京实验室,北京 100083;
4 天津体育学院 运动营养与健康组学研究中心,天津 301617
Development of a New Semi-nested PCR Real-time Fluorescence Technology for Detection of Toxoplasma gondii
CHEN Meng-Tao1, ZHU Long-Jiao2,3, LIU Hai-Yan4,*, XU Wen-Tao2,3,*
1 School of Public Health, North China University of Science and Technology, Tangshan 063210, China;
2 Department of Nutrition and Health, Key Laboratory of Food Precision Nutrition and Quality Control, China Agricultural University, Beijing 100083, China;
3 College of Food Science & Nutritional engineering, Key Laboratory of Transgenic Biological Safety Evaluation (Food Safety)/Food Science and Nutrition Engineering, Beijing Laboratory of Food Quality and Safety, China Agricultural University, Beijing 100083, China;
4 Research Center for Sports Nutrition and Eudainomics, Tianjin University of Sport, Tianjin 301617, China
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摘要 弓形虫(Toxoplasma gondii)是一种全世界分布的人畜共患寄生虫,在猪(Sus scrofa)和小型家畜中的慢性感染率较高,能够经食源性传播感染人类,对免疫功能较弱的个体会造成极大的危害。本研究根据GenBank公布的弓形虫529 bp基因序列(DQ779191.1)设计了一组特异性引物,基于SYBR GreenⅠ染料建立了半巢式PCR实时荧光法对弓形虫进行检测。第一轮扩增利用外引物扩增弓形虫529 bp重复序列,第二轮则结合SYBR GreenⅠ染料利用内引物对529 bp基因片段进行实时荧光扩增,其最终产物片段长度为260 bp。在优化后的最佳反应条件下,该方法的检测限为18.4 fg/μL,灵敏度较高;与细粒棘球绦虫(Echinococcus granulosus)、猪肉绦虫(Taenia solium)基因组均无交叉反应,特异性较强。因此,本研究成功建立了灵敏度高、特异性强的半巢式PCR实时荧光检测方法,为监测家畜及肉类食品中弓形虫感染情况提供了有效的技术手段。
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陈梦陶
朱龙佼
刘海燕
许文涛
关键词 半巢式PCRSYBR GreenⅠ染料弓形虫实时荧光检测    
AbstractToxoplasma gondii is a worldwide zoonotic parasite with a high chronic infection rate in pigs (Sus scrofa) and small ruminants. It can cause great harm to individuals after being infected with immunocompromised people through food-borne transmission. In this study, a set of specific primers were designed according to the 529 bp gene sequence of T. gondii (DQ779191.1) published in GenBank, and a semi-nested PCR real-time fluorescence method was established based on SYBR GreenⅠ dye to detect T. gondii. In the first-round of amplification, the 529 bp repetitive sequence of T.gondii was amplified by external primers, and then the 529 bp gene fragment was amplified by real-time fluorescence amplification with the internal primer of the second-round of amplification combined with SYBR GreenⅠ dye, and the final product fragment length was 260 bp. Under the optimized reaction conditions, the detection limit of this method was 18.4 fg/μL with high sensitivity. There was no cross reaction with the genomes of Echinococcus granulosus and Taenia solium, and the specificity was sound. Therefore, this study successfully established a new semi-nested PCR real-time fluorescence detection method with high sensitivity and specificity, which provides an effective technical means for monitoring T. gondii infection in livestock and meat products.
Key wordsSemi-nested PCR    SYBR GreenⅠdye    Toxoplasma gondii    Real-time fluorescence detection
收稿日期: 2023-02-27     
ZTFLH:  S828  
基金资助:国家重点研发计划(2022YFF0607900); 北京市科技计划(Z221100007122004); 北京市景观休闲农业创新团队项目(BAIC09-2023); 河北省重点研发计划(21372801D); 青年人才托举工程项目(BYESS2022133)
通讯作者: *xuwentao@cau.edu.cn;freeair772000@163.com   
引用本文:   
陈梦陶, 朱龙佼, 刘海燕, 许文涛. 弓形虫半巢式PCR实时荧光检测方法的建立[J]. 农业生物技术学报, 2023, 31(12): 2665-2673.
CHEN Meng-Tao, ZHU Long-Jiao, LIU Hai-Yan, XU Wen-Tao. Development of a New Semi-nested PCR Real-time Fluorescence Technology for Detection of Toxoplasma gondii. 农业生物技术学报, 2023, 31(12): 2665-2673.
链接本文:  
https://journal05.magtech.org.cn/Jwk_ny/CN/10.3969/j.issn.1674-7968.2023.12.020     或     https://journal05.magtech.org.cn/Jwk_ny/CN/Y2023/V31/I12/2665
 
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