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A Novel Quantification Method for Gene-Edited Animal Detection Based on ddPCR.

Kaili Wang1, Yi Ji2,3, Cheng Peng2,3

  • 1School of Food Science and Engineering, Ningbo University, Ningbo 215211, China.

Biology
|February 26, 2025
PubMed
Summary

A new droplet digital PCR (ddPCR) method accurately detects gene-edited cattle, addressing the need for quantitative analysis of gene-edited products. This advancement supports consumer safety and regulatory oversight for gene-edited foods.

Keywords:
MSTNddPCRgene editingnucleic acid detection

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Area of Science:

  • Biotechnology
  • Food Science
  • Molecular Biology

Background:

  • Gene-editing technologies are advancing, leading to commercialized products in the US and Japan.
  • Current detection methods like qPCR lack quantitative capabilities for gene-editing components.
  • Ensuring consumer safety and regulatory compliance for gene-edited products is critical.

Purpose of the Study:

  • To develop a novel, quantitative droplet digital PCR (ddPCR) detection method for gene-edited products.
  • To specifically target and quantify edits in MSTN-edited cattle.
  • To provide a reliable tool for regulatory monitoring of gene-edited animal-derived foods.

Main Methods:

  • Designed primers and probes targeting MSTN gene editing sites.
  • Developed and validated a ddPCR assay for specificity, sensitivity, and detection thresholds.
  • Tested the method on actual gene-edited cattle samples and plasmid DNA dilutions.

Main Results:

  • The ddPCR method demonstrated high specificity.
  • Achieved a sensitive detection limit of 5 copies/µL.
  • Successfully detected MSTN edits in all 11 tested cattle samples and showed consistent results across various concentrations (5%, 1%, 0.01%).

Conclusions:

  • The developed ddPCR assay is a sensitive and specific tool for detecting MSTN gene-edited cattle.
  • This method enables quantitative detection of gene-edited components in products.
  • The assay provides crucial support for the regulatory monitoring of gene-edited animal-derived foods.