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Environment
使用生物提取现场试剂盒和现场qPCR单元进行微生物DNA分析
使用生物提取现场试剂盒和现场qPCR单元进行微生物DNA分析
JoVE Journal
Environment
This content is Free Access.
JoVE Journal Environment
Microbial DNA Analysis in the Field Using a Biological Extraction Field Kit and a Field qPCR Unit

使用生物提取现场试剂盒和现场qPCR单元进行微生物DNA分析

Full Text
263 Views
07:33 min
January 2, 2026

DOI: 10.3791/69713-v

Sam Rosolina1, Adam Partin1, Charles Slater1, Dora Taggart1

1Microbial Insights, Inc.

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Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

This study presents reliable methods for field-deployable DNA analysis, focusing on environmental microbial analysis. It details the isolation of microbial DNA using a biological extraction field kit and subsequent analysis via a field qPCR unit.

Key Study Components

Area of Science

  • Environmental Microbiology
  • Molecular Biology
  • Field-deployable Techniques

Background

  • Field-deployable DNA analysis is essential for various industries.
  • Reliable molecular biological workflows can address research and accessibility gaps.
  • Understanding microbial roles in remediation and sustainability is crucial.
  • Current methods often lack portability and ease of use.

Purpose of Study

  • To develop simple and effective methods for field-based microbial DNA analysis.
  • To enhance environmental monitoring capabilities in remote locations.
  • To compare field methods with laboratory-based techniques.

Methods Used

  • Isolation of microbial DNA using a biological extraction field kit.
  • Analysis of DNA using a field-based qPCR unit.
  • Standard culture dilution for precision testing.
  • Field-extracted DNA samples processed for qPCR analysis.

Main Results

  • Successful DNA isolation confirmed by consistent qPCR results.
  • Low deviation in standard culture dilution across multiple repetitions.
  • Relative standard deviation below 5% across all runs.
  • Findings support enhanced environmental monitoring and community engagement.

Conclusions

  • The methods enable effective environmental monitoring in remote areas.
  • Results highlight the importance of immediate extraction and analysis.
  • Future research will explore limits of these methods under extreme conditions.

Frequently Asked Questions

What is the significance of field-deployable DNA analysis?
Field-deployable DNA analysis allows for immediate microbial assessment in remote locations, enhancing environmental monitoring.
How does the biological extraction field kit work?
The kit isolates microbial DNA from environmental samples using a series of syringes and filters to ensure effective extraction.
What are the advantages of using a field qPCR unit?
A field qPCR unit provides rapid DNA analysis, enabling timely results for environmental assessments.
How were the methods validated?
The methods were validated by comparing results with a laboratory-based approach, showing consistent outcomes.
What future research directions are suggested?
Future research will focus on testing these methods under extreme environmental conditions and with challenging sample types.

可靠且准确的现场部署DNA分析对许多行业至关重要。本文提出了两种用于现场环境微生物分析的方法:1)使用生物提取现场试剂盒从环境样本中分离微生物DNA,2)通过现场qPCR单元分析DNA。

我们的研究范围主要是进行分子分析,用于表征参与修复、采矿、防腐蚀的微生物,这也帮助我们解答关于可持续性的问题。本研究通过使用可靠且可现场携带的分子生物学工作流,解决了多个研究和可及性不足,这些工作流易于使用。打开滤芯两端,用锁定润滑器连接一个装满空气的三毫升注射器连接到滤芯。

推动空气排出残留水分。断开注射器,吸入更多空气后再重复。然后,重新盖上红色插座盖。

用注射器倒置溶液混合。取下Luer锁定注射器盖,通过Luer锁定尖端将溶液A注射器连接到封装的0.2微米滤芯入口。按下活塞,缓慢加入溶液A。然后用力摇晃关闭的滤芯五分钟。

现在,将溶液B注射器倒转几次以混合。取下Luer锁定盖,通过Luer锁定尖端将注射器连接到封装的过滤器入口。重新盖好进水口滤芯盖后,用力用手摇晃关闭的滤芯五分钟。

拆下进气口盖,倒置滤芯。使用连接在封装滤芯单元上的三毫升注射器,将一毫升空气注入滤芯。然后,拉回活塞,把所有裂解液都抽出来。

将裂解液转移到五毫升的珠管中。用防腐胶封好后,用力摇晃珠管五分钟后再竖直。将样品制备筒放在平面上,并将可锁定的Luer柱连接到一毫升注射器上。

用色柱尖端在样品制备盒的第一段上戳两个孔。从珠管中注入一毫升溶液,注入第一段新打孔的孔中。将注射器柱重新插入红色部分。

然后,将液体完全吸入注射器,再推出10次。现在,将注射器柱尖放在红橙色部分,穿透箔膜两孔。用活塞把注射器里的液体完全抽出,然后完全抽出。

同样,用注射筒柱刺穿并泵送橙色、黄色、蓝色、自然干燥和绿色部分,按该部分列出的次数拉动和推动活塞。然后,使用一毫升注射器和样品制备柱,将绿色切片中的所有溶液转移到标记清晰的一毫升微管中。将最多三份现场提取的DNA样本放入现场qPCR仪器的纯样本托盘批次中,确保每个指定切片各取一份样本。

将每个样品的检测试纸放入托盘对应的A、B或C条槽,使每个试纸的第一孔与托盘上的第一个槽对齐。解锁手机,打开以注册商标qPCR仪器命名的应用程序。应用程序打开后,点击“开始运行”按钮。

在下一界面,点击生成ID按钮。通过点击样本ID下方输入样本名称,输入样本信息。点击样品单位并选择相应单位,然后点击样本量,输入提取时使用的体积。

输入所有样本信息后,点击继续按钮。在下一界面,点击文件夹图标,然后点击“保存到当前文件夹”。输入运行名并点击确认。

按住电源键,直到所有前灯亮起,即可启动仪表。在应用中点击确认即可继续。在应用中通过集成的短距离无线连接。

按下仪表上的集成短距离无线按钮,直到蓝灯闪烁。然后点击确认,选择连接的乐器名称。取出第一个样品时,先把Go strip管上的盖子取下来。

向每个井中加入18微升无菌水,轻轻移液器溶解沉淀。每口井加入两微升样品,并用橡胶检测条封口封管,确保正确方向。所有试纸准备好后,在应用中点击确认。

取出每条检测试纸。检查井底是否有气泡,然后轻轻摇晃带状物直到气泡上升。点击确认即可继续。

打开仪器盖,将检测试纸按正确顺序和方向放入仪器中。盖上盖子直到锁上,然后点击确认。在应用中点击“开始运行”按钮即可开始运行。

跑步结束后,点击“邮件结果”。连接无线互联网后,点击“再次发送”即可发送结果。每次运行时彻底清洁托盘以防止污染。

与经过验证的实验室方法相比,通过一致的qPCR结果确认了使用生物提取现场试剂盒完成DNA分离的成功。使用现场qPCR单位分析的Dehalococcoides标准培养稀释结果显示,在21摄氏度和30摄氏度的10次重复中偏差较低。对现场仪器的精密测试显示,所有运行的相对标准差均低于5%。

因此,我们的发现通过使环境监测能够在这些偏远地区进行,推动了该领域的进步,促进了可及性、社区参与,并带来了极具影响力的科学研究。我们的结果为理解样品在运输过程中的变化与即时提取和分析的区别奠定了基础。未来的研究将聚焦于定义这些方法在盐水等极端样本以及极端天气条件下的极限。

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