应用化学 ›› 2022, Vol. 39 ›› Issue (3): 498-506.DOI: 10.19894/j.issn.1000-0518.210182

• 研究论文 • 上一篇    

商品化血糖仪用于乙型肝炎病毒的便携式体外分子诊断

于佳雪1,2, 王昶2,3, 杨媚婷2, 杜衍2,3(), 刘畅1()   

  1. 1.锦州医科大学药学院,锦州 121000
    2.中国科学院长春应用化学研究所,电分析化学国家重点实验室,长春 130022
    3.中国科学技术大学,合肥 230026
  • 收稿日期:2020-04-12 接受日期:2020-07-30 出版日期:2022-03-01 发布日期:2022-03-15
  • 通讯作者: 杜衍,刘畅
  • 基金资助:
    国家自然科学基金(21874129);吉林省科技厅国际科技合作项目(20200801044GH)

A Commercial Glucose Meter for Portable in vitro Molecular Diagnosis of Hepatitis B Virus

Jia-Xue YU1,2, Chang WANG2,3, Mei-Ting YANG2, Yan DU2,3(), Chang LIU1()   

  1. 1.College of Pharmacy,Jinzhou Medical University,Jinzhou 121001,China
    2.State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    3.School of Applied Chemistry and Engineering,University of Science & Technology of China,Hefei 230026,China
  • Received:2020-04-12 Accepted:2020-07-30 Published:2022-03-01 Online:2022-03-15
  • Contact: Yan DU,Chang LIU
  • About author:liuchang@jzmu.edu.cnduyan@ciac.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21874129);the International Technological Cooperation Project of Jilin Scientific and Technological Development Program(20200801044GH)

摘要:

为解决当前乙型肝炎病毒(HBV)基因检测技术在一定程度上存在成本高、操作繁琐、误诊率高等问题,在此提出了一种便携式生物传感平台用于HBV基因的超灵敏检测,可检出低至2 copies/μL的HBV基因。首次通过设计针对HBV检测序列的环介导等温扩增(LAMP)反应,实现了在40 min之内对HBV基因型单拷贝基因的检测。然后,通过在磁球上固定LAMP产物的捕获探针FP(F-Probe),同时在与FP部分互补的FPc(Complementary probe of F-Probe)链上修饰耐热蔗糖转化酶(Inv)构成Inv-FPc信号探针,Inv-FPc与FP杂交后组成信号转导探针。HBV基因的LAMP扩增产物与信号转导探针发生核酸链置换反应,使Inv-FPc信号探针脱离信号转导探针,磁性分离后溶液中的Inv-FPc信号探针可催化蔗糖转化为葡萄糖,最后通过血糖仪进行信号输出,即可间接实现对HBV基因的超灵敏检测。结果表明,所构建的生物传感平台在10~500 nmol/L浓度范围内对HBV基因片段具有良好的信号响应。选用诺如病毒基因对传感器的检测特异性进行验证,其信号与背景信号几乎一致。最后,通过对含10%体积分数人血清中的HBV基因进行检测,传感器依然展现了良好的“是/否”的特异性信号响应。为HBV的分子诊断提出一种新思路,所提出的新式传感器有望应用于HBV的现场即时(point-of-care,POC)诊断。

关键词: 环介导等温扩增, 血糖仪, 乙型肝炎病毒, 现场即时诊断

Abstract:

The current detection methods for hepatitis B virus (HBV) require high cost, complicated manipulation and are usually with high misdiagnosis rate. All the above issues have inspired us to develop a portable biosensing platform for the HBV detection. The loop-mediated isothermal amplification (LAMP) reaction designed for HBV sequence contributes to the single copy gene detection within 40 min. The immobilization of capture probe F-Probe (FP) on the magnetic beads (MBs) and the modification of FPc (partially complementary to FP) with heat-resistant invertase (Inv) collectively constitute the Inv-FPc signal probe, and the hybridization of Inv-FPc and FP creates the signal transduction probe, which with the HBV LAMP amplicons would induce the replacement of nucleic acid chains, isolating the Inv-FPc from the signal transduction probe. The Inv-FPc signal probe in the solution after magnetic separation would catalyze the transformation of sucrose into glucose that is read by glucometer. The experimental results show that the qualified signal response is in the concentration range of 10~500 nmol/L of HBV gene segments. Almost concordant signal and background are observed when employing Norovirus (NoV) gene as the target. The biosensor presents a perfect “yes/no” signal response in 10% human serum and has a potential to be applied in point of care diagnosis of HBV.

Key words: Loop-mediated isothermal amplification, Glucometer, Hepatitis B virus, Point-of-care testing

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