中国农业科学 ›› 2021, Vol. 54 ›› Issue (11): 2419-2433.doi: 10.3864/j.issn.0578-1752.2021.11.014

• 食品科学与工程 • 上一篇    下一篇

基于适配体的光学和电化学法对食源性致病菌检测的研究进展

惠媛媛(),彭海帅,王毕妮(),张富新,刘玉芳,贾蓉,任荣   

  1. 陕西师范大学食品工程与营养科学学院,西安 710119
  • 收稿日期:2020-09-16 接受日期:2020-12-21 出版日期:2021-06-01 发布日期:2021-06-09
  • 通讯作者: 王毕妮
  • 作者简介:惠媛媛,E-mail:570421161@qq.com
  • 基金资助:
    陕西省重点研发计划重点产业创新链项目(2019ZDLNY06-06);中央高校基本科研业务费专项(GK202003084);西安市科技计划农业技术研发项目(20NYYF0014);西安市科技计划农业技术研发项目(20NYYF0018)

Research Progress of Food-Borne Pathogen Detection Based on Electrochemical and Optical Aptasensors

HUI YuanYuan(),PENG HaiShuai,WANG BiNi(),ZHANG FuXin,LIU YuFang,JIA Rong,REN Rong   

  1. School of Food Engineering and Nutrition Sciences, Shaanxi Normal University, Xi’an 710119
  • Received:2020-09-16 Accepted:2020-12-21 Online:2021-06-01 Published:2021-06-09
  • Contact: BiNi WANG

摘要:

由于食品的多样性和食品基质的复杂性,食品安全问题已成为全社会共同关注的热点问题,其中微生物引起的食源性疾病居全球食品安全问题之首。食源性致病菌的检测是食源性疾病预防与控制的关键环节。平板计数法被评为微生物检测的金标准,但在致病菌检测过程中信号的放大需要通过单个细胞生长成菌落来实现,因此检测周期较长(3—7 d)。此外,现有的准确检测致病菌的技术有聚合酶链式反应(PCR)和酶联免疫吸附法(ELISA)等,但由于预处理时间长、操作复杂、检测结果存在假阳性等问题,不适合对致病菌进行现场快速有效的检测。核酸适配体是利用指数富集的配体系统进化技术(SELEX)从核酸分子文库中得到的寡核苷酸片段,具有良好的特异性、稳定性、易于修饰和亲和力高等特点,在毒素、抗生素、重金属和致病菌等其他小分子的检测中有很大的潜力。目前,国内外学者已开发了各种基于适配体的检测方法。本文综述了食品中常见的食源性致病菌及其传统的检测方法和近十年来用于致病菌检测的光学和电化学适配传感器,涵盖每种方法的检测策略、检测时间、检测范围和检测限等信息,也提出了适配体传感器在食品安全检测中存在的主要问题,并对其未来研究的发展趋势进行了展望,这些将为今后的研究工作提供一定的基础。

关键词: 食源性致病菌, 适配体, 快速检测, 食品安全

Abstract:

Food safety has become a heated topic attracting widespread attention from the society due to the diversity of food and complexity of food production system. Food-borne diseases caused by microorganisms have the highest rates in food safety problem. The detection of food-borne pathogenic bacteria is the key link for the food-borne disease prevention and control. The plate counting method is rated as the gold standard for microbial detection, but the signal amplification was achieved by the growth of individual bacterial cells into visible colony during the detection of pathogenic bacteria, so the detection time is longer (3-7 days). Although polymerase chain reaction (PCR) and enzyme-linked immunoabsorbent assay (ELISA) are now applied in the detection of food-borne pathogenic bacteria, they are not suitable for timely and rapid on-site detection due to time-consuming pretreatment, complex operations and false positive results. Aptamers (Apt) are oligonucleotides that are isolated from combinatorial DNA library via systemic evolution of ligands by exponential enrichment (SELEX) technology, which present great potential in the field of detection of toxin, heavy metal, antibiotics, food pathogens and other small molecules due to their small size, easy synthesis and modification. Currently, many researchers of domestic and overseas have developed various detection methods by using aptamer as bio-recognition elements. This paper reviewed common food-borne pathogenic bacteria, traditional detection methods of food-borne pathogenic bacteria, and the electrochemical and optical aptasensors for detection of food-borne pathogenic bacteria in recent years. The descriptions covered the detection strategy of each method and provided details such as the detection time, range and limit. Finally, the paper pointed out the flaw of aptasensor in food safety detection, and the research development tendency was prospected, which provided bases for the further related work.

Key words: food-born pathogen bacteria, aptamer, rapid detection, food safety