一种可视化双重荧光RT-LAMP方法鉴别不同毒力新城疫病毒Development and evaluation of a duplex fluorescence loop-mediated isothermal amplification method for distinguishing detection of virulent and non-virulent NDV
曾婷婷,谢丽基,谢芝勋,罗思思,李孟,黄娇玲,张民秀,张艳芳,范晴,邓显文
摘要(Abstract):
环介导等温扩增(loop-mediated isothermal amplification, LAMP)检测技术具有快速、敏感、仪器简单的优势。为了达到多重鉴别检测的目的,将分子信标引入LAMP反应体系,建立一套鉴别不同毒力新城疫病毒(Newcastle disease virus, NDV)的可视化双重荧光RT-LAMP方法。分别设计2套扩增不同毒力ClassⅡNDV F基因的LAMP引物,针对区分NDV毒力的分子标志F蛋白裂解位点的基序差异设计2条分子信标。中、强毒NDV分子信标5′端标记FAM荧光基团,3′端标记Dabcyl淬灭基团;弱毒NDV 5′端标记CY5荧光基团,3′端标记BHQ3淬灭基团。用经过条件优化的RT-LAMP体系对不同毒力NDV及其他病原进行鉴别检测,结果显示,LAMP引物能特异地扩增ClassⅡNDV,在荧光成像仪下,中、强毒NDV显示绿色荧光,弱毒显示红色荧光,混合感染显示黄色荧光,而其他家禽常见病原无荧光显示;以体外转录的NDV ssRNA片段为模板,建立的RT-LAMP反应体系最低检测限度为100 copies/μL;随机检测疑似NDV病料20份,鉴定结果与经分离、测序鉴定的结果一致。本研究建立的分子信标与LAMP结合的检测方法,可为NDV多重检测提供新的思路。
关键词(KeyWords): 双重荧光RT-LAMP;分子信标;新城疫病毒;F基因
基金项目(Foundation): 广西创新驱动发展专项资助项目(桂科AA17204057);; 广西重点研发计划资助项目(桂科AB16380054);; 广西科技基地与人才专项资助项目(桂科AD17195083);; “广西八桂学者”专项资助项目(2019A50)
作者(Author): 曾婷婷,谢丽基,谢芝勋,罗思思,李孟,黄娇玲,张民秀,张艳芳,范晴,邓显文
DOI: 10.16303/j.cnki.1005-4545.2021.10.03
参考文献(References):
- [1] ABABNEH M M K,DALAB A E,ALSAAD S R,et al.Molecular characterization of a recent Newcastle disease virus outbreak in Jordan[J].Res Vet Sci,2012,93(3):1512-1514.
- [2] CZEGLéDI A,UJVáRI D,SOMOGYI E,et al.Third genome size category of avian paramyxovirus serotype 1 (Newcastle disease virus) and evolutionary implications[J].Virus Res,2006,120(1/2):36-48.
- [3] OIE.Newcastle Disease,biological standards commission,manual of diagnostic tests and vaccines for terrestrial animals:mammals,birds and bees,7th[M].Paris,France:World Organisation for Animal Health,2012:555-574.
- [4] 唐小飞,谢芝勋,刘加波,等.多重RT-PCR快速检测鉴别新城疫病毒强毒株和弱毒疫苗株方法的建立[J].中国兽医科学,2005,35(11):888-891.
- [5] 王珂,袁乾亮,尹仁福,等.强、弱毒力新城疫病毒双重荧光定量RT-PCR检测方法的建立[J].中国兽医学报,2017,37(1):1-6.
- [6] NOTOMI T,OKAYAMA H,MASUBUCHI H,et al.Loop-mediated isothermal amplification of DNA[J].Nucleic Acids Res,2000,28(12):E63.
- [7] 谢丽基,谢芝勋,罗思思,等.2017年广西地区活禽市场新城疫病原学监测与遗传进化分析[J].中国预防兽医学报,2018,40(8):89-92.
- [8] 曾婷婷,谢芝勋,谢丽基,等.2018年广西活禽市场新城疫病毒分子流行病学分析[J].中国家禽,2020,42(3):22-28.
- [9] 甘文佳,胡旭初.LAMP技术及其在病原基因诊断中的应用[J].中国病原生物学杂志,2010,5(2):143-145.
- [10] 张玉霞,杨金兴,孟凯,等.鹅星状病毒 LAMP 快速检测方法的建立与应用[J].中国预防兽医学报,2019,41(11):1137-1140.
- [11] 范晴,邓显文,刘加波,等.二重荧光RT-LAMP方法鉴别检测口蹄疫病毒和水泡性口炎病毒[J].畜牧兽医学报,2018,49(5):996-1004.
- [12] 谢志勤,张民秀,谢芝勋,等.猪瘟病毒和猪繁殖与呼吸综合征病毒二重荧光 LAMP 检测方法的建立[J].中国兽医科学,2020,54(9):4-12.
- [13] TYAGI S,KRAMER F R.Molecular beacons:probes that fluoresce upon hybridization[J].Nat Biotechnol,1996,14(3):303-308.
- [14] ZHENG J,YANG R H,SHI M L,et al.Rationally designed molecular beacons for bioanalytical and biomedical applications[J].Chem Soc Rev,2015,44(10):3036-3055.
- [15] LEEUW D.Virulence of Newcastle disease virus is determined by the cleavage site of the fusion protein and by both the stem region and globular head of the haemagglutinin-neuraminidase protein[J].J Gen Virol,2005,86(6):1759-1769.
- [16] HE Y,LU B,DIMITROV K M,et al.Complete genome sequencing,molecular epidemiological,and pathogenicity analysis of pigeon paramyxoviruses type 1 isolated in guangxi,China during 2012-2018[J].Viruses,2020,12(4):366.
- [17] AFONSO C L.Not so fast on recombination analysis of Newcastle disease virus[J].J Virol,2008,82(18):9303.
- [18] SONG Q,CAO Y,LI Q,et al.Artificial recombination may influence the evolutionary analysis of Newcastle disease virus[J].J Virol,2011,85(19):10409.