Hydrogel-Based Colorimetric Assay for Multiplexed MicroRNA Detection in a Microfluidic Device.
Hyewon Lee1, Jiseok Lee2, Seung-Goo Lee1,3
1Synthetic Biology and Bioengineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea.
Analytical Chemistry
|March 26, 2020
Summary
This study presents a novel hydrogel microfluidic platform for easy, point-of-care microRNA (miRNA) profiling. The system enables sensitive and reliable detection of miRNA biomarkers in cancer diagnostics without complex equipment.
Area of Science:
- Biomedical Engineering
- Molecular Diagnostics
- Microfluidics
Background:
- MicroRNA (miRNA) expression patterns are crucial for understanding disease states.
- Current miRNA diagnostics face challenges in point-of-care (POC) translation due to complex equipment requirements.
Purpose of the Study:
- To develop a user-friendly, hydrogel-based microfluidic platform for miRNA profiling.
- To enable sensitive and reliable miRNA detection in a POC setting without specialized instrumentation.
Main Methods:
- Development of a hydrogel-based microfluidic device for integrated miRNA assay.
- Implementation of gold deposition for signal amplification and dark-field imaging for sensitive detection.
- Assay validation using multiplexed detection of miRNA panels in biological samples.
Main Results:
- Achieved a limit of detection of 260 fM for miRNA quantification.
- Demonstrated successful multiplexing of miRNA panels in healthy and cancer samples.
- Platform operates without complex external fluidic or imaging systems.
Conclusions:
- The developed platform offers a versatile solution for high-confidence POC profiling of cancer-associated miRNA dysregulation.
- Hydrogel substrate and colorimetric analysis facilitate on-chip miRNA detection.
- This technology can advance accessible miRNA diagnostics for various applications.
