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Establishing an RNA sensor with high sensitivity and dynamic range utilizing a signal amplifier platform
Ha Eun Lim1, James Chappell1,2, Laura Segatori1,2,3
1Department of Bioengineering, Rice University, Houston, TX, 77005, USA.
Biorxiv : the Preprint Server for Biology
|September 26, 2025
Summary
This study enhances RNA sensors (RADAR) with signal amplification for precise gene expression monitoring. The improved platform offers higher sensitivity and dynamic range for detecting low-abundance transcripts in dynamic disease environments.
Area of Science:
- Biotechnology
- Molecular Biology
- Gene Expression Regulation
Background:
- Precise gene expression control is crucial for treating dynamic diseases like cancer and inflammation.
- Current methods struggle with heterogeneous cell states and low-abundance transcripts.
- RNA sensors offer programmable cell-state classification but have limited sensitivity.
Purpose of the Study:
- To enhance the sensitivity and dynamic range of RNA sensors for detecting endogenous transcripts.
- To develop a platform for real-time monitoring of gene expression in complex biological systems.
- To enable precision therapeutic strategies through improved transcript detection.
Main Methods:
- Integration of RADAR (RNA sensing using Adenosine Deaminases Acting on RNA) sensors with a signal amplification circuit.
- Development of a combined RADAR-amplifier platform for transcript detection.
- Testing the platform's performance under physiological conditions for real-time monitoring.
Main Results:
- The integrated RADAR-amplifier platform significantly enhanced sensitivity and dynamic range.
- The system enabled real-time monitoring of subtle changes in endogenous transcript abundance.
- Demonstrated utility for fundamental biological studies and precision therapeutics.
Conclusions:
- The enhanced RADAR-amplifier platform overcomes limitations of traditional RNA sensors.
- This technology provides a sensitive tool for studying gene expression in dynamic environments.
- The platform holds promise for advancing precision medicine and therapeutic development.
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