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Related Concept Videos

Real Time RT-PCR02:57

Real Time RT-PCR

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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.
The real-time quantification of the number of amplified products is...
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Updated: Jul 28, 2025

Simple Bulk Readout of Digital Nucleic Acid Quantification Assays
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Hydrogel capsule-based digital quantitative polymerase chain reaction.

Zheng Lin Tan1, Masato Yasuura2, Yukichi Horiguchi2

  • 1Sensing System Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan. tan.zhenglin@aist.go.jp.

Mikrochimica Acta
|June 1, 2023
PubMed
Summary
This summary is machine-generated.

Gel capsule-based digital PCR (gc-dPCR) offers improved stability and sensitivity over traditional droplet digital PCR (ddPCR). This novel method enhances nucleic acid quantification and reduces costs, making it more accessible.

Keywords:
Droplet digital polymerase chain reactionGel capsule digital polymerase chain reaction; Fluorescence microplate readerHydrogelNucleic acid quantification

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Analytical Chemistry

Background:

  • Droplet digital PCR (ddPCR) offers high accuracy in nucleic acid quantification due to its linearity and sensitivity.
  • The stability of droplets during thermal cycling is a limitation for ddPCR, impacting quantification accuracy.
  • Current methods to improve droplet stability, such as fluorinated oil or surfactants, increase costs and complicate post-PCR analysis.

Purpose of the Study:

  • To introduce a novel gel capsule-based digital PCR (gc-dPCR) method.
  • To enhance the stability and sensitivity of digital PCR.
  • To reduce the cost and complexity associated with ddPCR.

Main Methods:

  • Development of hydrogel capsules to encapsulate PCR reaction mixtures.
  • Conducting PCR reactions within these hydrogel capsules.
  • Readout of results using quantitative PCR (qPCR) systems or fluorescence microplate readers, with comparison to vortex ddPCR.

Main Results:

  • Gel capsule-based digital PCR (gc-dPCR) demonstrated higher fluorescence intensity compared to vortex ddPCR, indicating increased sensitivity.
  • Hydrogel capsules exhibited superior stability during thermal cycling compared to oil-based droplets.
  • The gc-dPCR method allows for quantification of all partitions, preventing information loss from low-concentration samples.

Conclusions:

  • Gel capsule-based digital PCR (gc-dPCR) significantly improves upon droplet digital PCR (ddPCR) by enhancing droplet stability and assay sensitivity.
  • This method reduces the overall cost of digital PCR, addressing a key barrier for its adoption in resource-limited settings.
  • The gc-dPCR approach is adaptable to other droplet-based PCR techniques, offering broad applicability in nucleic acid quantification.