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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.
Abstract:
Precise control of gene expression in a cell-state-specific manner is essential for effective therapeutic interventions in complex and dynamic disease microenvironments. Traditional targeting strategies that rely on surface markers or cell type-specific promoters often assume static cellular identities, limiting effectiveness in contexts such as cancer and inflammation, where cell states are highly heterogeneous and dynamic. RNA sensors, such as RADAR (RNA sensing using Adenosine Deaminases Acting on RNA), provide a modular, programmable, and non-integrating platform for classifying cell states. However, it is also characterized by low sensitivity and dynamic range, which limits its applications in detecting low-abundance transcripts. In this work, we integrate RADAR sensors with a signal amplification circuit to enhance sensitivity and dynamic range. We demonstrate that this combined RADAR-amplifier platform enables real-time monitoring of subtle changes in the abundance of endogenous transcripts under physiological conditions. Our results demonstrate the utility of this platform for fundamental biological studies and the development of precision therapeutic strategies.
Insights
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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