CRISPR/dCas9-Assisted On-Bead Multiplex Detection (BeadPlex2) for Genetically Modified Crops.
Wang H, Li F, He Y, Liu X, Yin Y
Crispr
Knowing exactly which genetic modifications are in your food—whether it's the corn in your tortilla chips or the soy in your protein bar—just got easier and more reliable thanks to a test that can check for five different GM markers at once.
Researchers created tiny magnetic beads coated with gold nanoparticles, each tuned to glow with a unique light signature. They paired these beads with a modified version of the CRISPR gene-editing tool that can find and latch onto specific DNA sequences in crops without cutting them. When the tool finds a genetic modification, the bead lights up in a way that can be read by a laser, allowing five different genetic changes to be detected in a single test.
Key Findings
Five distinct types of magnetic bead sensors (MagGERTs) were created, each encoding a unique Raman spectral signature to enable simultaneous multiplex detection of GM events
The system uses CRISPR/dCas9 (a DNA-binding version of CRISPR that does not cut DNA) for highly precise target recognition, reducing false positives compared to traditional methods
The BeadPlex2 platform was validated across diverse genetically modified crop events, demonstrating broad applicability for GM crop identification
chevron_right Technical Summary
Scientists developed a new lab test called BeadPlex2 that can simultaneously detect multiple genetic modifications in crops with high accuracy, using CRISPR gene-targeting technology combined with light-scattering nanoparticles attached to magnetic beads.
Abstract Preview
This study leverages the precise recognition ability of CRISPR/dCas9 and the Raman coding feature of the gap-enhanced Raman tag-encoded magnetic beads (MagGERTs) to create a unique on-bead nucleic ...
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