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Related Concept Videos

Real Time RT-PCR02:57

Real Time RT-PCR

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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Visual Detection of Multiple Nucleic Acids in a Capillary Array
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Published on: November 15, 2017

Comprehensive GMO detection using real-time PCR array: single-laboratory validation.

Junichi Mano1, Mioko Harada, Reona Takabatake

  • 1National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan.

Journal of AOAC International
|June 2, 2012
PubMed
Summary

A new real-time PCR array method accurately detects genetically modified (GM) organisms and their DNA. This validated approach ensures reliable identification of GM events in agricultural products.

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Area of Science:

  • Food safety and analytical chemistry
  • Molecular biology and biotechnology
  • Agricultural science

Background:

  • Accurate detection of genetically modified (GM) organisms is crucial for regulatory compliance and consumer safety.
  • Existing methods may lack comprehensiveness or require extensive validation for diverse agricultural matrices.
  • A validated, multi-target approach is needed for robust GM detection.

Purpose of the Study:

  • To develop and validate a real-time PCR array method for comprehensive GM organism detection.
  • To validate DNA extraction methods for various agricultural products (maize, soybean, canola).
  • To validate individual PCR assays for specificity and limit of detection (LOD).

Main Methods:

  • Development of a 96-well real-time PCR array targeting specific GM events, recombinant DNA (r-DNA) segments, and taxon-specific DNA.
  • Selection and evaluation of DNA extraction methods for maize flour, soybean flour, and ground canola seeds.
  • Validation of component PCR assays for specificity and LOD, and assessment of DNA quality (quantity, fragmentation, inhibition).

Main Results:

  • The developed real-time PCR array method comprehensively detects GM organisms.
  • Selected DNA extraction methods yielded high-quality DNA suitable for PCR analysis across different matrices.
  • All component PCR assays met predefined validation criteria for specificity and LOD.

Conclusions:

  • The single-laboratory validation confirmed the reliability of the real-time PCR array method for GM detection.
  • The validated DNA extraction and PCR assay components provide a robust tool for agricultural product analysis.
  • This method supports accurate and comprehensive monitoring of GM content in food and feed.