环介导等温扩增技术(LAMP)检测人星状病毒方法的建立及其在再生水检测中的应用
-
杨丽1,2,3,
-
何晓青1,
-
韦玉梅1,2,
-
朱轶1,
-
程莉1,2,
-
王子健2,
-
黄文3
作者简介:
杨丽(1986-),女,硕士研究生,主要研究方向为水环境中病原微生物检测,E-mail:yl870723@sina.com
- 1. 北京林业大学生物科学与技术学院, 北京 100083;
- 2. 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;
- 3. 华中农业大学食品科技学院, 湖北武汉 430070
摘要: 为快速高效地检测人星状病毒,建立了一种新的试验方法——环介导等温扩增技术(loop-mediated isothermal amplification technology,LAMP),并对人星状病毒LAMP反应条件进行了优化。结果表明,镁离子终浓度为4 mmol·L-1、甜菜碱终浓度为1 mol·L-1的25 μL体系下65℃反应90 min为其最佳反应条件。对扩增终产物进一步进行酶切分析得到的条带大小与预期的结果(84和135 bp)吻合,以人星状病毒、轮状病毒及诺如病毒为模板进行特异性测试亦没有发生交叉反应。将人星状病毒质粒等倍稀释后分别用LAMP及聚合酶链式反应(PCR)检测其灵敏度,结果表明,LAMP与PCR的灵敏度分别达到5.04 copies·μL-1和50.4 copies·μL-1。用改良的逆转录环介导等温扩增技术(RT-LAMP)及逆转录PCR (RT-PCR)检测12个再生水水样,其中人星状病毒检出率为分别为41.7%(5/12)和33.3%(4/12)。以上结果证明,LAMP是一种检测程序简单、灵敏度和特异性较高的检测手段,在人星状病毒的快速检测方面具有一定的开发潜力。
Loop-Mediated Isothermal Amplification (LAMP) for Detection of Human Astrovirus and Its Application in Reclaimed Water
-
Yang Li1,2,3,
-
He Xiaoqing1,
-
Wei Yumei1,2,
-
Zhu Yi1,
-
Cheng Li1,2,
-
Wang Zijian2,
-
Huang Wen3
- 1. School of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China;
- 2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
- 3. School of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Received Date:
2011-02-13
Fund Project:
Abstract: A loop-mediated isothermal amplification (LAMP) technology was developed for rapidly detecting human astrovirus. The data showed that the optimal amplification condition was at 65℃ for 90 min with 4 mmol·L-1 magnesium ions and 1 mol·L-1 betaine. The specificity of RT-LAMP assay was further validated by restriction analgsis of the amplified products and we got two bands (84bp and 135bp) as expected. There is also no cross-reaction with different virus (human rotavirus and norovirus) and restriction analysis of the amplified products. The sensitivity of the LAMP and PCR were 5.04 copies·μL-1 and 5.04×10 copies·μL-1, respectively. Improved RT-LAMP and RT-PCR were both used for detection of human astrovirus in 12 reclaimed water samples. The detection rates of human astrovirus were 41.7% (5/12) and 33.3% (4/12), respectively. All these results suggested that LAMP was a simple, high sensitivity and specificity method which was potential for rapid detection of human astrovirus.