Lateral flow nucleic acid assay for Ecytonucleospora hepatopenaei based on recombinase polymerase amplification and strand displacement reaction.

IF 1.1 4区 农林科学 Q3 FISHERIES
Na Ying, Yuan Wang, Bo Qin, Yanqing Wu, Zitong Wang, Huijuan Chen, Xuefeng Song, Zhixing Su, Wenhong Fang
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引用次数: 0

Abstract

The incidence of Ecytonucleospora hepatopenaei (EHP) infections in farmed shrimp has increased markedly in recent years, resulting in significant economic losses for the global shrimp farming industry. The lack of an efficacious drug for EHP infection has led to the development of a strategy based on the timely screening and elimination of EHP-carrying shrimp seeds as a means of preventing financial loss. This strategy requires portable, accurate and rapid detection methods for EHP, especially when applied to sites such as farms. However, the current lack of user-friendly devices capable of real-time detection under field conditions represents a significant challenge in the implementation of this strategy. In this study, an isothermal amplification nucleic acid biosensor for EHP detection was developed. The biosensor targeted the spore wall protein gene of EHP and amplified the target gene by recombinase polymerase amplification (RPA) combined with strand displacement reaction (SDR). The amplified products were applied on gold nanoparticle-based lateral flow nucleic acid strips (LFNAS) for visual signal conversion. The limit of detection of the SDR-RPA-LFNAS assay was 7 copies reaction-1, and the entire process could be completed in 30 min without cross-reaction. In contrast to existing conventional RPA-related detection methods, the introduction of SDR, which is used to eliminate the background signal produced by long primers, avoids the use of endonucleases and reduces costs. Moreover, the biosensor is straightforward to operate and does not require the use of expensive machinery, rendering it more suitable for the in situ detection of EHP in shrimp farms or aquaculture facilities.

基于重组酶聚合酶扩增和链置换反应的肝芽胞核孢子虫侧流核酸检测。
近年来,养殖对虾中肝芽胞核孢子虫(EHP)感染的发病率显著增加,给全球虾养殖业造成了重大的经济损失。由于缺乏治疗EHP感染的有效药物,因此制定了一项以及时筛查和消除携带EHP的虾种子为基础的战略,作为防止经济损失的一种手段。这一战略需要便携式、准确和快速的EHP检测方法,特别是在应用于农场等地点时。然而,目前缺乏能够在现场条件下实时检测的用户友好设备,这对实施这一战略构成了重大挑战。本研究研制了一种用于EHP检测的等温扩增核酸生物传感器。该生物传感器以EHP的孢子壁蛋白基因为靶点,采用重组酶聚合酶扩增(RPA)和链置换反应(SDR)相结合的方法对目标基因进行扩增。将扩增产物应用于基于金纳米颗粒的侧流核酸条带(LFNAS)上进行视觉信号转换。dr - rpa - lfnas法的检出限为7拷贝反应-1,整个过程可在30 min内完成,无交叉反应。与现有的常规rna相关检测方法相比,SDR的引入消除了长引物产生的背景信号,避免了内切酶的使用,降低了成本。此外,生物传感器操作简单,不需要使用昂贵的机器,使其更适合对虾养殖场或水产养殖设施的EHP现场检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Diseases of aquatic organisms
Diseases of aquatic organisms 农林科学-兽医学
CiteScore
3.10
自引率
0.00%
发文量
53
审稿时长
8-16 weeks
期刊介绍: DAO publishes Research Articles, Reviews, and Notes, as well as Comments/Reply Comments (for details see DAO 48:161), Theme Sections and Opinion Pieces. For details consult the Guidelines for Authors. Papers may cover all forms of life - animals, plants and microorganisms - in marine, limnetic and brackish habitats. DAO''s scope includes any research focusing on diseases in aquatic organisms, specifically: -Diseases caused by coexisting organisms, e.g. viruses, bacteria, fungi, protistans, metazoans; characterization of pathogens -Diseases caused by abiotic factors (critical intensities of environmental properties, including pollution)- Diseases due to internal circumstances (innate, idiopathic, genetic)- Diseases due to proliferative disorders (neoplasms)- Disease diagnosis, treatment and prevention- Molecular aspects of diseases- Nutritional disorders- Stress and physical injuries- Epidemiology/epizootiology- Parasitology- Toxicology- Diseases of aquatic organisms affecting human health and well-being (with the focus on the aquatic organism)- Diseases as indicators of humanity''s detrimental impact on nature- Genomics, proteomics and metabolomics of disease- Immunology and disease prevention- Animal welfare- Zoonosis
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