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Related Experiment Video

Updated: Feb 20, 2026

CIRCLE-Seq for Interrogation of Off-Target Gene Editing

CIRCLE-Seq for Interrogation of Off-Target Gene Editing

Published on: November 1, 2024

Programmable AND-gate strategy to reduce false positives in rolling circle amplification.

Jiho Seok¹, Mark P Styczynski¹

¹School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0100, United States.

Biosensors & Bioelectronics

|February 18, 2026

Summary

This summary is machine-generated.

Multi-Key Rolling Circle Amplification (RCA) uses Boolean logic to detect multiple nucleic acid sequences, significantly reducing false positives in point-of-care diagnostics. This synthetic biology approach enhances biosensor specificity for field applications.

Keywords:

Boolean logic False-positives Lateral flow assay (LFA)Multiplexed detection Rolling circle amplification (RCA)

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Published on: June 14, 2021

Area of Science:

Synthetic Biology
Molecular Diagnostics
Biosensor Technology

Background:

Improving biosensor specificity and reducing false positives is critical for point-of-care (POC) diagnostics.
Nucleic acid detection biosensors are valuable for POC applications but often suffer from false positives during isothermal amplification.
Rolling Circle Amplification (RCA) is a common isothermal method susceptible to near-target amplification, leading to inaccuracies.

Purpose of the Study:

To develop a novel nucleic acid detection method with enhanced specificity and reduced false positives for POC diagnostics.
To introduce an AND-gate Boolean logic system into RCA to create Multi-Key RCA.
To integrate Multi-Key RCA with a lateral flow assay for a user-friendly, equipment-free diagnostic platform.

Main Methods:

Developed Multi-Key RCA incorporating an AND-gate Boolean logic requiring detection of multiple nucleic acid sequences for amplification.
Evaluated Multi-Key RCA for its ability to reduce false positives and detect single-nucleotide polymorphisms (SNPs).
Integrated Multi-Key RCA with a lateral flow assay, enabling a one-pot reaction and lyophilization for stability.

Main Results:

Multi-Key RCA significantly reduced false positives compared to conventional RCA.
Achieved high specificity in detecting single-nucleotide polymorphisms (SNPs).
Demonstrated the ability of Multi-Key RCA to detect RNA and be expanded to more than two inputs.
Successfully created a user-friendly, equipment-free diagnostic platform using Multi-Key RCA and lateral flow assay.

Conclusions:

Boolean logic-based synthetic biology, specifically Multi-Key RCA, effectively reduces false positives in nucleic acid biosensors.
The developed platform is suitable for field-deployable diagnostics due to its simplicity, user-friendliness, and potential for long-term storage.
This approach holds significant promise for improving the accuracy and reliability of POC diagnostic tools.