A novel universal primer-multiplex-PCR method with sequencing gel electrophoresis analysis

Area of Science:

• Molecular Biology
• Biotechnology
• Genetics

Background:

• Conventional multiplex PCR methods for detecting genetically modified (GM) organisms often suffer from complex procedures, reduced sensitivity, and amplification inconsistencies.
• Existing techniques may struggle with specificity and accurate quantification, particularly in complex sample matrices.

Purpose of the Study:

• To develop and validate a novel universal primer-multiplex PCR (UP-M-PCR) assay for sensitive and specific detection of GM crops.
• To overcome the limitations of traditional multiplex PCR, including self-inhibition and amplification disparity.

Main Methods:

• A universal primer (UP) was incorporated into the multiplex PCR reaction system.
• Specific primer pairs were designed with a universal adapter at the 5'-end, functioning as the UP.
• PCR products were analyzed using high-resolution sequencing gel electrophoresis (SGE).

Main Results:

• The UP-M-PCR method demonstrated high specificity and a low detection limit of 0.1 ng for individual crop types in mixture samples.
• The assay effectively addressed issues like complex manipulation, lower sensitivity, self-inhibition, and amplification disparity inherent in conventional multiplex PCR.
• Extraordinary resolution was achieved through sequencing gel electrophoresis analysis.

Conclusions:

• The developed UP-M-PCR assay combined with SGE provides a robust and efficient tool for GM crop detection.
• This novel method is applicable for verifying GM status across various crops and GM traits, irrespective of the sample composition.
• The UP-M-PCR technique offers significant advantages for regulatory screening and quality control in the agricultural biotechnology sector.