Universal PCR Assay for Multi-GMO Detection
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Solution Overview
Problem
Current methods for detecting genetically modified organisms (GMOs) in food and feed products are laborious and costly due to the need for multiple event-specific assays, which are expensive and limited to single-event detection, making it inefficient for the increasing number of authorized GMOs.
Innovation Solution
A method using PCR amplification with carefully chosen sequence features that are not event-specific, allowing for the detection of multiple GMOs in a single assay, reducing the number of tests required and improving cost, time, and labor effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple event-specific assays are used to detect different GMOs, then detection accuracy and reliability are improved, but the number of tests, labor, and cost increase significantly
Solution Approach 1:
The patent applies universality by designing a single PCR assay that can detect multiple different GMO events simultaneously using shared sequence features (such as promoter regions, terminator sequences, or gene constructs) that are common across multiple transgenic plant events. This multi-functional assay replaces the need for multiple separate event-specific assays, thereby maintaining detection accuracy while significantly improving testing efficiency and reducing labor and cost.
2Measurement precision
If event-specific assays are used for each GMO type, then detection specificity is improved, but the complexity and cost of the detection system increase
Solution Approach 1:
The patent implements a universal PCR assay that detects multiple GMO events through shared sequence features, reducing assay complexity while maintaining specificity. By using common elements like viral promoters (e.g., CaMV 35S), plant promoters (e.g., Ubiquitin, Cauliflower Mosaic Virus), or specific gene constructs that appear across multiple events, the system achieves specific detection without requiring separate assays for each event.
Solution Approach 2:
The patent merges multiple detection functions into a single assay by combining detection of different GMO events that share common sequence features. This consolidation reduces the number of separate tests required, simplifies the overall detection system, and lowers operational complexity while still providing event-specific information where needed.
3Loss of information
If a battery of separate event-specific detection assays is applied to each sample, then comprehensive GMO characterization is achieved, but time expense and labor intensity increase
Solution Approach 1:
The patent employs a universal PCR-based detection system that simultaneously characterizes multiple GMO events in a single test by detecting shared sequence features. This approach provides comprehensive GMO composition characterization (identifying which events are present) while reducing testing time and labor intensity compared to running multiple separate event-specific assays sequentially.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the number of tests needed to characterize GMO composition, enhancing the efficiency and cost-effectiveness of GMO detection by allowing simultaneous detection of multiple GMOs using shared sequence features.
Implementation Method 1
the presence or absence of nucleic acids in a sample is detected using PCR amplification, preferably real-time PCR amplification
Data Source
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AI summary
The present invention relates to detection of materials derived from transgenic plant events. Inparticular, the invention provides methods, reagents, kits and reference materials for detecting the presence or absence in a sample of genetic material derived from and attributable to select transgenic plant events.