Multiplexed, universal probe-based rare variant detection with USE-PCR.

Area of Science:

• Molecular Biology
• Biotechnology
• Genomics

Background:

• Polymerase chain reaction (PCR) is crucial for research and diagnostics.
• Current PCR methods face limitations in multiplexing, probe specificity, and data interpretation.
• There is a need for more robust and scalable target detection technologies.

Purpose of the Study:

• To introduce Universal Signal Encoding PCR (USE-PCR) as a novel approach for overcoming PCR limitations.
• To develop a scalable and robust platform for high-throughput multiplexed analyte detection.
• To enable simultaneous detection of multiple targets and single nucleotide variants.

Main Methods:

• Developed USE-PCR integrating universal hydrolysis probes, amplitude modulation, multispectral encoding, and standardized analysis.
• Validated USE-PCR using 32 synthetic templates across four digital PCR (dPCR) platforms.
• Combined USE-PCR with RNase H-based detection chemistry for single nucleotide variant analysis.

Main Results:

• USE-PCR achieved high target identification accuracy: 92.6% (high copy) and 97.6% (low copy).
• Demonstrated excellent linearity (R²=0.99) and a four-order-of-magnitude dynamic range.
• Enabled simultaneous calling of 32 single nucleotide variants with up to 86.5% accuracy in cancer cell lines.

Conclusions:

• USE-PCR is a transformative platform for robust, scalable, and high-throughput multiplexed analyte detection.
• The technology significantly improves upon traditional PCR limitations.
• USE-PCR holds significant potential for applications in both research and clinical settings.