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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
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Related Experiment Video

Updated: Jul 2, 2025

Open-Source Miniature Fluorimeter to Monitor Real-Time Isothermal Nucleic Acid Amplification Reactions in Resource-Limited Settings
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Three-Dimensional-Printed Instrument for Isothermal Nucleic Acid Amplification with Real-Time Colorimetric Imaging.

Tiffany R Layne1, Anchi Scott1, Larissa L Cunha1

  • 1Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA.

Micromachines
|February 24, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel, automated system for objective colorimetric analysis of isothermal amplification, specifically loop-mediated isothermal amplification (LAMP). The cost-effective, 3D-printed device offers high-throughput, precise detection for various research applications.

Keywords:
3D printingLabVIEWRaspberry Piforensic body fluid identificationimage analysisisothermalloop-mediated isothermal amplification

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Analytical Chemistry

Background:

  • Isothermal amplification methods, like loop-mediated isothermal amplification (LAMP), are valued for their simplicity.
  • Colorimetry is a common, yet subjective, method for monitoring LAMP reactions.
  • Objective detection is needed to overcome limitations in visual interpretation of color changes.

Purpose of the Study:

  • To develop a novel, automated, and integrated analysis system for objective colorimetric detection of isothermal amplification.
  • To create a cost-effective, high-throughput platform adaptable to various colorimetric dyes.
  • To validate the system's performance against conventional methods.

Main Methods:

  • Development of a one-step, automated analysis system featuring 3D-printed convective heating.
  • Integration of programmed image capture with simultaneous heating for real-time monitoring.
  • Utilization of LabVIEW software for automated image analysis and objective colorimetric assessment.
  • Validation using messenger-RNA targets and mock forensic samples.

Main Results:

  • The developed system provides objective colorimetric analysis of isothermal amplification.
  • Performance was comparable to conventional thermal cyclers and smartphone-based image analysis.
  • The system demonstrated exceptional throughput, analyzing up to 96 samples concurrently.
  • The device is cost-effective and adaptable to multiple colorimetric dyes.

Conclusions:

  • The novel automated system enhances the objectivity and efficiency of isothermal amplification monitoring.
  • This integrated platform offers a cost-effective and high-throughput solution for molecular diagnostics and research.
  • The technology has potential applications in various fields requiring precise nucleic acid detection.